ipfw: Add ipfrag filter.
[dragonfly.git] / sbin / ipfw / ipfw2.c
1 /*
2  * Copyright (c) 2002 Luigi Rizzo
3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4  * Copyright (c) 1994 Ugen J.S.Antsilevich
5  *
6  * Idea and grammar partially left from:
7  * Copyright (c) 1993 Daniel Boulet
8  *
9  * Redistribution and use in source forms, with and without modification,
10  * are permitted provided that this entire comment appears intact.
11  *
12  * Redistribution in binary form may occur without any restrictions.
13  * Obviously, it would be nice if you gave credit where credit is due
14  * but requiring it would be too onerous.
15  *
16  * This software is provided ``AS IS'' without any warranties of any kind.
17  *
18  * NEW command line interface for IP firewall facility
19  *
20  * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $
21  */
22
23 #include <sys/param.h>
24 #include <sys/mbuf.h>
25 #include <sys/socket.h>
26 #include <sys/sockio.h>
27 #include <sys/sysctl.h>
28 #include <sys/time.h>
29 #include <sys/wait.h>
30
31 #include <ctype.h>
32 #include <err.h>
33 #include <errno.h>
34 #include <grp.h>
35 #include <limits.h>
36 #include <netdb.h>
37 #include <pwd.h>
38 #include <signal.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <string.h>
43 #include <timeconv.h>
44 #include <unistd.h>
45 #include <sysexits.h>
46
47 #include <net/if.h>
48 #include <netinet/in.h>
49 #include <netinet/in_systm.h>
50 #include <netinet/ip.h>
51 #include <netinet/ip_icmp.h>
52 #include <net/ipfw/ip_fw.h>
53 #include <net/route.h> /* def. of struct route */
54 #include <net/ethernet.h>
55 #include <net/dummynet/ip_dummynet.h>
56 #include <netinet/tcp.h>
57 #include <arpa/inet.h>
58
59 int             s,                      /* main RAW socket */
60                 do_resolv,              /* Would try to resolve all */
61                 do_acct,                /* Show packet/byte count */
62                 do_time,                /* Show time stamps */
63                 do_quiet,               /* Be quiet in add and flush */
64                 do_force,               /* Don't ask for confirmation */
65                 do_pipe,                /* this cmd refers to a pipe */
66                 do_table,               /* this cmd referes to a table */
67                 do_sort,                /* field to sort results (0 = no) */
68                 do_dynamic,             /* display dynamic rules */
69                 do_expired,             /* display expired dynamic rules */
70                 do_compact,             /* show rules in compact mode */
71                 show_sets,              /* display rule sets */
72                 verbose;
73
74 #define IP_MASK_ALL     0xffffffff
75
76 /*
77  * structure to hold flag names and associated values to be
78  * set in the appropriate masks.
79  * A NULL string terminates the array.
80  * Often, an element with 0 value contains an error string.
81  *
82  */
83 struct _s_x {
84         const char *s;
85         uint32_t x;
86 };
87
88 static struct _s_x f_tcpflags[] = {
89         { "syn", TH_SYN },
90         { "fin", TH_FIN },
91         { "ack", TH_ACK },
92         { "psh", TH_PUSH },
93         { "rst", TH_RST },
94         { "urg", TH_URG },
95         { "tcp flag", 0 },
96         { NULL, 0 }
97 };
98
99 static struct _s_x f_tcpopts[] = {
100         { "mss",        IP_FW_TCPOPT_MSS },
101         { "maxseg",     IP_FW_TCPOPT_MSS },
102         { "window",     IP_FW_TCPOPT_WINDOW },
103         { "sack",       IP_FW_TCPOPT_SACK },
104         { "ts",         IP_FW_TCPOPT_TS },
105         { "timestamp",  IP_FW_TCPOPT_TS },
106         { "cc",         IP_FW_TCPOPT_CC },
107         { "tcp option", 0 },
108         { NULL, 0 }
109 };
110
111 /*
112  * IP options span the range 0 to 255 so we need to remap them
113  * (though in fact only the low 5 bits are significant).
114  */
115 static struct _s_x f_ipopts[] = {
116         { "ssrr",       IP_FW_IPOPT_SSRR},
117         { "lsrr",       IP_FW_IPOPT_LSRR},
118         { "rr",         IP_FW_IPOPT_RR},
119         { "ts",         IP_FW_IPOPT_TS},
120         { "ip option",  0 },
121         { NULL, 0 }
122 };
123
124 static struct _s_x f_iptos[] = {
125         { "lowdelay",   IPTOS_LOWDELAY},
126         { "throughput", IPTOS_THROUGHPUT},
127         { "reliability", IPTOS_RELIABILITY},
128         { "mincost",    IPTOS_MINCOST},
129         { "congestion", IPTOS_CE},
130         { "ecntransport", IPTOS_ECT},
131         { "ip tos option", 0},
132         { NULL, 0 }
133 };
134
135 static struct _s_x limit_masks[] = {
136         {"all",         DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
137         {"src-addr",    DYN_SRC_ADDR},
138         {"src-port",    DYN_SRC_PORT},
139         {"dst-addr",    DYN_DST_ADDR},
140         {"dst-port",    DYN_DST_PORT},
141         {NULL,          0}
142 };
143
144 /*
145  * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
146  * This is only used in this code.
147  */
148 #define IPPROTO_ETHERTYPE       0x1000
149 static struct _s_x ether_types[] = {
150     /*
151      * Note, we cannot use "-:&/" in the names because they are field
152      * separators in the type specifications. Also, we use s = NULL as
153      * end-delimiter, because a type of 0 can be legal.
154      */
155         { "ip",         0x0800 },
156         { "ipv4",       0x0800 },
157         { "ipv6",       0x86dd },
158         { "arp",        0x0806 },
159         { "rarp",       0x8035 },
160         { "vlan",       0x8100 },
161         { "loop",       0x9000 },
162         { "trail",      0x1000 },
163         { "pppoe_disc", 0x8863 },
164         { "pppoe_sess", 0x8864 },
165         { "ipx_8022",   0x00E0 },
166         { "ipx_8023",   0x0000 },
167         { "ipx_ii",     0x8137 },
168         { "ipx_snap",   0x8137 },
169         { "ipx",        0x8137 },
170         { "ns",         0x0600 },
171         { NULL,         0 }
172 };
173
174 static void show_usage(void);
175
176 enum tokens {
177         TOK_NULL=0,
178
179         TOK_OR,
180         TOK_NOT,
181         TOK_STARTBRACE,
182         TOK_ENDBRACE,
183
184         TOK_ACCEPT,
185         TOK_COUNT,
186         TOK_DEFRAG,
187         TOK_PIPE,
188         TOK_QUEUE,
189         TOK_DIVERT,
190         TOK_TEE,
191         TOK_FORWARD,
192         TOK_SKIPTO,
193         TOK_DENY,
194         TOK_REJECT,
195         TOK_RESET,
196         TOK_UNREACH,
197         TOK_CHECKSTATE,
198
199         TOK_UID,
200         TOK_GID,
201         TOK_IN,
202         TOK_LIMIT,
203         TOK_KEEPSTATE,
204         TOK_LAYER2,
205         TOK_OUT,
206         TOK_XMIT,
207         TOK_RECV,
208         TOK_VIA,
209         TOK_FRAG,
210         TOK_IPFRAG,
211         TOK_IPOPTS,
212         TOK_IPLEN,
213         TOK_IPID,
214         TOK_IPPRECEDENCE,
215         TOK_IPTOS,
216         TOK_IPTTL,
217         TOK_IPVER,
218         TOK_ESTAB,
219         TOK_SETUP,
220         TOK_TCPFLAGS,
221         TOK_TCPOPTS,
222         TOK_TCPSEQ,
223         TOK_TCPACK,
224         TOK_TCPWIN,
225         TOK_ICMPTYPES,
226         TOK_MAC,
227         TOK_MACTYPE,
228
229         TOK_PLR,
230         TOK_NOERROR,
231         TOK_BUCKETS,
232         TOK_DSTIP,
233         TOK_SRCIP,
234         TOK_DSTPORT,
235         TOK_SRCPORT,
236         TOK_ALL,
237         TOK_MASK,
238         TOK_BW,
239         TOK_DELAY,
240         TOK_RED,
241         TOK_GRED,
242         TOK_DROPTAIL,
243         TOK_PROTO,
244         TOK_WEIGHT,
245 };
246
247 struct _s_x dummynet_params[] = {
248         { "plr",                TOK_PLR },
249         { "noerror",            TOK_NOERROR },
250         { "buckets",            TOK_BUCKETS },
251         { "dst-ip",             TOK_DSTIP },
252         { "src-ip",             TOK_SRCIP },
253         { "dst-port",           TOK_DSTPORT },
254         { "src-port",           TOK_SRCPORT },
255         { "proto",              TOK_PROTO },
256         { "weight",             TOK_WEIGHT },
257         { "all",                TOK_ALL },
258         { "mask",               TOK_MASK },
259         { "droptail",           TOK_DROPTAIL },
260         { "red",                TOK_RED },
261         { "gred",               TOK_GRED },
262         { "bw",                 TOK_BW },
263         { "bandwidth",          TOK_BW },
264         { "delay",              TOK_DELAY },
265         { "pipe",               TOK_PIPE },
266         { "queue",              TOK_QUEUE },
267         { "dummynet-params",    TOK_NULL },
268         { NULL, 0 }
269 };
270
271 struct _s_x rule_actions[] = {
272         { "accept",             TOK_ACCEPT },
273         { "pass",               TOK_ACCEPT },
274         { "allow",              TOK_ACCEPT },
275         { "permit",             TOK_ACCEPT },
276         { "count",              TOK_COUNT },
277         { "pipe",               TOK_PIPE },
278         { "queue",              TOK_QUEUE },
279         { "divert",             TOK_DIVERT },
280         { "tee",                TOK_TEE },
281         { "fwd",                TOK_FORWARD },
282         { "forward",            TOK_FORWARD },
283         { "skipto",             TOK_SKIPTO },
284         { "deny",               TOK_DENY },
285         { "drop",               TOK_DENY },
286         { "reject",             TOK_REJECT },
287         { "reset",              TOK_RESET },
288         { "unreach",            TOK_UNREACH },
289         { "check-state",        TOK_CHECKSTATE },
290         { "defrag",             TOK_DEFRAG },
291         { NULL,                 TOK_NULL },
292         { NULL, 0 }
293 };
294
295 struct _s_x rule_options[] = {
296         { "uid",                TOK_UID },
297         { "gid",                TOK_GID },
298         { "in",                 TOK_IN },
299         { "limit",              TOK_LIMIT },
300         { "keep-state",         TOK_KEEPSTATE },
301         { "layer2",             TOK_LAYER2 },
302         { "out",                TOK_OUT },
303         { "xmit",               TOK_XMIT },
304         { "recv",               TOK_RECV },
305         { "via",                TOK_VIA },
306         { "fragment",           TOK_FRAG },
307         { "frag",               TOK_FRAG },
308         { "ipfrag",             TOK_IPFRAG },
309         { "ipoptions",          TOK_IPOPTS },
310         { "ipopts",             TOK_IPOPTS },
311         { "iplen",              TOK_IPLEN },
312         { "ipid",               TOK_IPID },
313         { "ipprecedence",       TOK_IPPRECEDENCE },
314         { "iptos",              TOK_IPTOS },
315         { "ipttl",              TOK_IPTTL },
316         { "ipversion",          TOK_IPVER },
317         { "ipver",              TOK_IPVER },
318         { "estab",              TOK_ESTAB },
319         { "established",        TOK_ESTAB },
320         { "setup",              TOK_SETUP },
321         { "tcpflags",           TOK_TCPFLAGS },
322         { "tcpflgs",            TOK_TCPFLAGS },
323         { "tcpoptions",         TOK_TCPOPTS },
324         { "tcpopts",            TOK_TCPOPTS },
325         { "tcpseq",             TOK_TCPSEQ },
326         { "tcpack",             TOK_TCPACK },
327         { "tcpwin",             TOK_TCPWIN },
328         { "icmptype",           TOK_ICMPTYPES },
329         { "icmptypes",          TOK_ICMPTYPES },
330         { "dst-ip",             TOK_DSTIP },
331         { "src-ip",             TOK_SRCIP },
332         { "dst-port",           TOK_DSTPORT },
333         { "src-port",           TOK_SRCPORT },
334         { "proto",              TOK_PROTO },
335         { "MAC",                TOK_MAC },
336         { "mac",                TOK_MAC },
337         { "mac-type",           TOK_MACTYPE },
338
339         { "not",                TOK_NOT },              /* pseudo option */
340         { "!", /* escape ? */   TOK_NOT },              /* pseudo option */
341         { "or",                 TOK_OR },               /* pseudo option */
342         { "|", /* escape */     TOK_OR },               /* pseudo option */
343         { "{",                  TOK_STARTBRACE },       /* pseudo option */
344         { "(",                  TOK_STARTBRACE },       /* pseudo option */
345         { "}",                  TOK_ENDBRACE },         /* pseudo option */
346         { ")",                  TOK_ENDBRACE },         /* pseudo option */
347         { NULL,                 TOK_NULL },
348         { NULL, 0 }
349 };
350
351 /**
352  * match_token takes a table and a string, returns the value associated
353  * with the string (0 meaning an error in most cases)
354  */
355 static int
356 match_token(struct _s_x *table, char *string)
357 {
358         struct _s_x *pt;
359         int i = strlen(string);
360
361         for (pt = table ; i && pt->s != NULL ; pt++)
362                 if ((int)strlen(pt->s) == i && !bcmp(string, pt->s, i))
363                         return pt->x;
364         return -1;
365 };
366
367 static const char *
368 match_value(struct _s_x *p, u_int32_t value)
369 {
370         for (; p->s != NULL; p++)
371                 if (p->x == value)
372                         return p->s;
373         return NULL;
374 }
375
376 /*
377  * prints one port, symbolic or numeric
378  */
379 static void
380 print_port(int proto, u_int16_t port)
381 {
382
383         if (proto == IPPROTO_ETHERTYPE) {
384                 const char *str;
385
386                 if (do_resolv && (str = match_value(ether_types, port)) )
387                         printf("%s", str);
388                 else
389                         printf("0x%04x", port);
390         } else {
391                 struct servent *se = NULL;
392                 if (do_resolv) {
393                         struct protoent *pe = getprotobynumber(proto);
394
395                         se = getservbyport(htons(port), pe ? pe->p_name : NULL);
396                 }
397                 if (se)
398                         printf("%s", se->s_name);
399                 else
400                         printf("%d", port);
401         }
402 }
403
404 /*
405  * print the values in a list of ports
406  * XXX todo: add support for mask.
407  */
408 static void
409 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
410 {
411         u_int16_t *p = cmd->ports;
412         int i;
413         const char *sep= " ";
414
415         if (cmd->o.len & F_NOT)
416                 printf(" not");
417         if (opcode != 0)
418                 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
419                     (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
420         for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
421                 printf("%s", sep);
422                 print_port(proto, p[0]);
423                 if (p[0] != p[1]) {
424                         printf("-");
425                         print_port(proto, p[1]);
426                 }
427                 sep = ",";
428         }
429 }
430
431 /*
432  * Like strtol, but also translates service names into port numbers
433  * for some protocols.
434  * In particular:
435  *      proto == -1 disables the protocol check;
436  *      proto == IPPROTO_ETHERTYPE looks up an internal table
437  *      proto == <some value in /etc/protocols> matches the values there.
438  * Returns *end == s in case the parameter is not found.
439  */
440 static int
441 strtoport(char *str, char **end, int base, int proto)
442 {
443         char *p, *buf;
444         char *s1;
445         int i;
446
447         *end = str;             /* default - not found */
448         if (*str == '\0')
449                 return 0;       /* not found */
450
451         if (isdigit(*str))
452                 return strtol(str, end, base);
453
454         /*
455          * find separator. '\\' escapes the next char.
456          */
457         for (s1 = str; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
458                 if (*s1 == '\\' && s1[1] != '\0')
459                         s1++;
460
461         buf = malloc(s1 - str + 1);
462         if (buf == NULL)
463                 return 0;
464
465         /*
466          * copy into a buffer skipping backslashes
467          */
468         for (p = str, i = 0; p != s1 ; p++)
469                 if ( *p != '\\')
470                         buf[i++] = *p;
471         buf[i++] = '\0';
472
473         if (proto == IPPROTO_ETHERTYPE) {
474                 i = match_token(ether_types, buf);
475                 free(buf);
476                 if (i != -1) {  /* found */
477                         *end = s1;
478                         return i;
479                 }
480         } else {
481                 struct protoent *pe = NULL;
482                 struct servent *se;
483
484                 if (proto != 0)
485                         pe = getprotobynumber(proto);
486                 setservent(1);
487                 se = getservbyname(buf, pe ? pe->p_name : NULL);
488                 free(buf);
489                 if (se != NULL) {
490                         *end = s1;
491                         return ntohs(se->s_port);
492                 }
493         }
494         return 0;       /* not found */
495 }
496
497 /*
498  * fill the body of the command with the list of port ranges.
499  * At the moment it only understands numeric ranges.
500  */
501 static int
502 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
503 {
504         u_int16_t *p = cmd->ports;
505         int i = 0;
506         char *str = av;
507
508         while (*str) {
509                 u_int16_t a, b;
510
511                 a = strtoport(av, &str, 0, proto);
512                 if (str == av) /* no parameter */
513                         break;
514                 if (*str == '-') { /* a range */
515                         av = str+1;
516                         b = strtoport(av, &str, 0, proto);
517                         if (str == av) /* no parameter */
518                                 break;
519                         p[0] = a;
520                         p[1] = b;
521                 } else if (*str == ',' || *str == '\0' ) {
522                         p[0] = p[1] = a;
523                 } else {        /* invalid separator */
524                         errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
525                                 *str, av);
526                 }
527                 i++;
528                 p += 2;
529                 av = str+1;
530         }
531         if (i > 0) {
532                 if (i+1 > F_LEN_MASK)
533                         errx(EX_DATAERR, "too many ports/ranges\n");
534                 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
535         }
536         return i;
537 }
538
539 static struct _s_x icmpcodes[] = {
540       { "net",                  ICMP_UNREACH_NET },
541       { "host",                 ICMP_UNREACH_HOST },
542       { "protocol",             ICMP_UNREACH_PROTOCOL },
543       { "port",                 ICMP_UNREACH_PORT },
544       { "needfrag",             ICMP_UNREACH_NEEDFRAG },
545       { "srcfail",              ICMP_UNREACH_SRCFAIL },
546       { "net-unknown",          ICMP_UNREACH_NET_UNKNOWN },
547       { "host-unknown",         ICMP_UNREACH_HOST_UNKNOWN },
548       { "isolated",             ICMP_UNREACH_ISOLATED },
549       { "net-prohib",           ICMP_UNREACH_NET_PROHIB },
550       { "host-prohib",          ICMP_UNREACH_HOST_PROHIB },
551       { "tosnet",               ICMP_UNREACH_TOSNET },
552       { "toshost",              ICMP_UNREACH_TOSHOST },
553       { "filter-prohib",        ICMP_UNREACH_FILTER_PROHIB },
554       { "host-precedence",      ICMP_UNREACH_HOST_PRECEDENCE },
555       { "precedence-cutoff",    ICMP_UNREACH_PRECEDENCE_CUTOFF },
556       { NULL, 0 }
557 };
558
559 static void
560 fill_reject_code(u_short *codep, char *str)
561 {
562         int val;
563         char *s1;
564
565         val = strtoul(str, &s1, 0);
566         if (s1 == str || *s1 != '\0' || val >= 0x100)
567                 val = match_token(icmpcodes, str);
568         if (val < 0)
569                 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
570         *codep = val;
571         return;
572 }
573
574 static void
575 print_reject_code(u_int16_t code)
576 {
577         const char *str = match_value(icmpcodes, code);
578
579         if (str != NULL)
580                 printf("unreach %s", str);
581         else
582                 printf("unreach %u", code);
583 }
584
585 /*
586  * Returns the number of bits set (from left) in a contiguous bitmask,
587  * or -1 if the mask is not contiguous.
588  * XXX this needs a proper fix.
589  * This effectively works on masks in big-endian (network) format.
590  * when compiled on little endian architectures.
591  *
592  * First bit is bit 7 of the first byte -- note, for MAC addresses,
593  * the first bit on the wire is bit 0 of the first byte.
594  * len is the max length in bits.
595  */
596 static int
597 contigmask(u_char *p, int len)
598 {
599         int i, n;
600         for (i=0; i<len ; i++)
601                 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
602                         break;
603         for (n=i+1; n < len; n++)
604                 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
605                         return -1; /* mask not contiguous */
606         return i;
607 }
608
609 /*
610  * print flags set/clear in the two bitmasks passed as parameters.
611  * There is a specialized check for f_tcpflags.
612  */
613 static void
614 print_flags(const char *name, ipfw_insn *cmd, struct _s_x *list)
615 {
616         const char *comma="";
617         int i;
618         u_char set = cmd->arg1 & 0xff;
619         u_char clear = (cmd->arg1 >> 8) & 0xff;
620
621         if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
622                 printf(" setup");
623                 return;
624         }
625
626         printf(" %s ", name);
627         for (i=0; list[i].x != 0; i++) {
628                 if (set & list[i].x) {
629                         set &= ~list[i].x;
630                         printf("%s%s", comma, list[i].s);
631                         comma = ",";
632                 }
633                 if (clear & list[i].x) {
634                         clear &= ~list[i].x;
635                         printf("%s!%s", comma, list[i].s);
636                         comma = ",";
637                 }
638         }
639 }
640
641 /*
642  * Print the ip address contained in a command.
643  */
644 static void
645 print_ip(ipfw_insn_ip *cmd, const char *str)
646 {
647         struct hostent *he = NULL;
648         int mb;
649
650         printf("%s%s ", cmd->o.len & F_NOT ? " not": "", str);
651
652         if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
653                 printf("me");
654                 return;
655         }
656         if (cmd->o.opcode == O_IP_SRC_TABLE ||
657             cmd->o.opcode == O_IP_DST_TABLE) {
658                 printf("<%u>", cmd->o.arg1);
659                 return;
660         }
661         if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
662                 u_int32_t x, *d;
663                 int i;
664                 char comma = '{';
665
666                 x = cmd->o.arg1 - 1;
667                 x = htonl( ~x );
668                 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
669                 printf("%s/%d", inet_ntoa(cmd->addr),
670                         contigmask((u_char *)&x, 32));
671                 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
672                 x &= 0xff; /* base */
673                 d = (u_int32_t *)&(cmd->mask);
674                 for (i=0; i < cmd->o.arg1; i++)
675                         if (d[ i/32] & (1<<(i & 31))) {
676                                 printf("%c%d", comma, i+x);
677                                 comma = ',';
678                         }
679                 printf("}");
680                 return;
681         }
682         if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
683                 mb = 32;
684         else
685                 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
686         if (mb == 32 && do_resolv)
687                 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long),
688                     AF_INET);
689         if (he != NULL)         /* resolved to name */
690                 printf("%s", he->h_name);
691         else if (mb == 0)       /* any */
692                 printf("any");
693         else {          /* numeric IP followed by some kind of mask */
694                 printf("%s", inet_ntoa(cmd->addr));
695                 if (mb < 0)
696                         printf(":%s", inet_ntoa(cmd->mask));
697                 else if (mb < 32)
698                         printf("/%d", mb);
699         }
700 }
701
702 /*
703  * prints a MAC address/mask pair
704  */
705 static void
706 print_mac(u_char *addr, u_char *mask)
707 {
708         int l = contigmask(mask, 48);
709
710         if (l == 0)
711                 printf(" any");
712         else {
713                 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
714                     addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
715                 if (l == -1)
716                         printf("&%02x:%02x:%02x:%02x:%02x:%02x",
717                             mask[0], mask[1], mask[2],
718                             mask[3], mask[4], mask[5]);
719                 else if (l < 48)
720                         printf("/%d", l);
721         }
722 }
723
724 static void
725 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
726 {
727         u_int8_t type;
728
729         cmd->d[0] = 0;
730         while (*av) {
731                 if (*av == ',')
732                         av++;
733
734                 type = strtoul(av, &av, 0);
735
736                 if (*av != ',' && *av != '\0')
737                         errx(EX_DATAERR, "invalid ICMP type");
738
739                 if (type > 31)
740                         errx(EX_DATAERR, "ICMP type out of range");
741
742                 cmd->d[0] |= 1 << type;
743         }
744         cmd->o.opcode = O_ICMPTYPE;
745         cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
746 }
747
748 static void
749 print_icmptypes(ipfw_insn_u32 *cmd)
750 {
751         int i;
752         char sep= ' ';
753
754         printf(" icmptypes");
755         for (i = 0; i < 32; i++) {
756                 if ( (cmd->d[0] & (1 << (i))) == 0)
757                         continue;
758                 printf("%c%d", sep, i);
759                 sep = ',';
760         }
761 }
762
763 /*
764  * show_ipfw() prints the body of an ipfw rule.
765  * Because the standard rule has at least proto src_ip dst_ip, we use
766  * a helper function to produce these entries if not provided explicitly.
767  * The first argument is the list of fields we have, the second is
768  * the list of fields we want to be printed.
769  *
770  * Special cases if we have provided a MAC header:
771  *   + if the rule does not contain IP addresses/ports, do not print them;
772  *   + if the rule does not contain an IP proto, print "all" instead of "ip";
773  *
774  * Once we have 'have_options', IP header fields are printed as options.
775  */
776 #define HAVE_PROTO      0x0001
777 #define HAVE_SRCIP      0x0002
778 #define HAVE_DSTIP      0x0004
779 #define HAVE_MAC        0x0008
780 #define HAVE_MACTYPE    0x0010
781 #define HAVE_OPTIONS    0x8000
782
783 #define HAVE_IP         (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
784 static void
785 show_prerequisites(int *flags, int want, int cmd)
786 {
787         if ( (*flags & HAVE_IP) == HAVE_IP)
788                 *flags |= HAVE_OPTIONS;
789
790         if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
791              cmd != O_MAC_TYPE) {
792                 /*
793                  * mac-type was optimized out by the compiler,
794                  * restore it
795                  */
796                 printf(" any");
797                 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
798                 return;
799         }
800         if ( !(*flags & HAVE_OPTIONS)) {
801                 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
802                         printf(" ip");
803                 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
804                         printf(" from any");
805                 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
806                         printf(" to any");
807         }
808         *flags |= want;
809 }
810
811 static void
812 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth)
813 {
814         static int twidth = 0;
815         int l;
816         ipfw_insn *cmd;
817         int proto = 0;          /* default */
818         int flags = 0;  /* prerequisites */
819         ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
820         int or_block = 0;       /* we are in an or block */
821
822         u_int32_t set_disable = rule->set_disable;
823
824         if (set_disable & (1 << rule->set)) { /* disabled */
825                 if (!show_sets)
826                         return;
827                 else
828                         printf("# DISABLED ");
829         }
830         printf("%05u ", rule->rulenum);
831
832         if (do_acct)
833                 printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth,
834                     (uintmax_t)rule->bcnt);
835
836         if (do_time) {
837                 char timestr[30];
838
839                 if (twidth == 0) {
840                         time_t t0 = 0;
841
842                         strcpy(timestr, ctime((time_t *)&t0));
843                         *strchr(timestr, '\n') = '\0';
844                         twidth = strlen(timestr);
845                 }
846                 if (rule->timestamp) {
847                         time_t t = _long_to_time(rule->timestamp);
848
849                         strcpy(timestr, ctime(&t));
850                         *strchr(timestr, '\n') = '\0';
851                         printf("%s ", timestr);
852                 } else {
853                         printf("%*s ", twidth, " ");
854                 }
855         }
856
857         if (show_sets)
858                 printf("set %d ", rule->set);
859
860         /*
861          * print the optional "match probability"
862          */
863         if (rule->cmd_len > 0) {
864                 cmd = rule->cmd ;
865                 if (cmd->opcode == O_PROB) {
866                         ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
867                         double d = 1.0 * p->d[0];
868
869                         d = (d / 0x7fffffff);
870                         printf("prob %f ", d);
871                 }
872         }
873
874         /*
875          * first print actions
876          */
877         for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
878                         l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
879                 switch(cmd->opcode) {
880                 case O_CHECK_STATE:
881                         printf("check-state");
882                         flags = HAVE_IP; /* avoid printing anything else */
883                         break;
884
885                 case O_ACCEPT:
886                         printf("allow");
887                         break;
888
889                 case O_COUNT:
890                         printf("count");
891                         break;
892
893                 case O_DEFRAG:
894                         printf("defrag");
895                         break;
896
897                 case O_DENY:
898                         printf("deny");
899                         break;
900
901                 case O_REJECT:
902                         if (cmd->arg1 == ICMP_REJECT_RST)
903                                 printf("reset");
904                         else if (cmd->arg1 == ICMP_UNREACH_HOST)
905                                 printf("reject");
906                         else
907                                 print_reject_code(cmd->arg1);
908                         break;
909
910                 case O_SKIPTO:
911                         printf("skipto %u", cmd->arg1);
912                         break;
913
914                 case O_PIPE:
915                         printf("pipe %u", cmd->arg1);
916                         break;
917
918                 case O_QUEUE:
919                         printf("queue %u", cmd->arg1);
920                         break;
921
922                 case O_DIVERT:
923                         printf("divert %u", cmd->arg1);
924                         break;
925
926                 case O_TEE:
927                         printf("tee %u", cmd->arg1);
928                         break;
929
930                 case O_FORWARD_IP:
931                     {
932                         ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd;
933
934                         printf("fwd %s", inet_ntoa(sa->sa.sin_addr));
935                         if (sa->sa.sin_port)
936                                 printf(",%d", sa->sa.sin_port);
937                     }
938                         break;
939
940                 case O_LOG: /* O_LOG is printed last */
941                         logptr = (ipfw_insn_log *)cmd;
942                         break;
943
944                 default:
945                         printf("** unrecognized action %d len %d",
946                                 cmd->opcode, cmd->len);
947                 }
948         }
949         if (logptr) {
950                 if (logptr->max_log > 0)
951                         printf(" log logamount %d", logptr->max_log);
952                 else
953                         printf(" log");
954         }
955
956         /*
957          * then print the body.
958          */
959         if (rule->usr_flags & IPFW_USR_F_NORULE) {
960                 /* empty rules before options */
961                 if (!do_compact)
962                         printf(" ip from any to any");
963                 flags |= HAVE_IP | HAVE_OPTIONS;
964         }
965
966         for (l = rule->act_ofs, cmd = rule->cmd ;
967                         l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
968                 /* useful alias */
969                 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
970
971                 show_prerequisites(&flags, 0, cmd->opcode);
972
973                 switch(cmd->opcode) {
974                 case O_PROB:    
975                         break;  /* done already */
976
977                 case O_PROBE_STATE:
978                         break; /* no need to print anything here */
979
980                 case O_MACADDR2: {
981                         ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
982
983                         if ((cmd->len & F_OR) && !or_block)
984                                 printf(" {");
985                         if (cmd->len & F_NOT)
986                                 printf(" not");
987                         printf(" MAC");
988                         flags |= HAVE_MAC;
989                         print_mac( m->addr, m->mask);
990                         print_mac( m->addr + 6, m->mask + 6);
991                         }
992                         break;
993
994                 case O_MAC_TYPE:
995                         if ((cmd->len & F_OR) && !or_block)
996                                 printf(" {");
997                         print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
998                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
999                         flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
1000                         break;
1001
1002                 case O_IP_SRC:
1003                 case O_IP_SRC_MASK:
1004                 case O_IP_SRC_ME:
1005                 case O_IP_SRC_SET:
1006                 case O_IP_SRC_TABLE:
1007                         show_prerequisites(&flags, HAVE_PROTO, 0);
1008                         if (!(flags & HAVE_SRCIP))
1009                                 printf(" from");
1010                         if ((cmd->len & F_OR) && !or_block)
1011                                 printf(" {");
1012                         print_ip((ipfw_insn_ip *)cmd,
1013                                 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1014                         flags |= HAVE_SRCIP;
1015                         break;
1016
1017                 case O_IP_DST:
1018                 case O_IP_DST_MASK:
1019                 case O_IP_DST_ME:
1020                 case O_IP_DST_SET:
1021                 case O_IP_DST_TABLE:
1022                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1023                         if (!(flags & HAVE_DSTIP))
1024                                 printf(" to");
1025                         if ((cmd->len & F_OR) && !or_block)
1026                                 printf(" {");
1027                         print_ip((ipfw_insn_ip *)cmd,
1028                                 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1029                         flags |= HAVE_DSTIP;
1030                         break;
1031
1032                 case O_IP_DSTPORT:
1033                         show_prerequisites(&flags, HAVE_IP, 0);
1034                 case O_IP_SRCPORT:
1035                         show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1036                         if ((cmd->len & F_OR) && !or_block)
1037                                 printf(" {");
1038                         print_newports((ipfw_insn_u16 *)cmd, proto,
1039                                 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1040                         break;
1041
1042                 case O_PROTO: {
1043                         struct protoent *pe;
1044
1045                         if ((cmd->len & F_OR) && !or_block)
1046                                 printf(" {");
1047                         if (cmd->len & F_NOT)
1048                                 printf(" not");
1049                         proto = cmd->arg1;
1050                         pe = getprotobynumber(cmd->arg1);
1051                         if (flags & HAVE_OPTIONS)
1052                                 printf(" proto");
1053                         if (pe)
1054                                 printf(" %s", pe->p_name);
1055                         else
1056                                 printf(" %u", cmd->arg1);
1057                         }
1058                         flags |= HAVE_PROTO;
1059                         break;
1060
1061                 default: /*options ... */
1062                         show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1063                         if ((cmd->len & F_OR) && !or_block)
1064                                 printf(" {");
1065                         if (cmd->len & F_NOT && cmd->opcode != O_IN)
1066                                 printf(" not");
1067                         switch(cmd->opcode) {
1068                         case O_FRAG:
1069                                 printf(" frag");
1070                                 break;
1071
1072                         case O_IPFRAG:
1073                                 printf(" ipfrag");
1074                                 break;
1075
1076                         case O_IN:
1077                                 printf(cmd->len & F_NOT ? " out" : " in");
1078                                 break;
1079
1080                         case O_LAYER2:
1081                                 printf(" layer2");
1082                                 break;
1083                         case O_XMIT:
1084                         case O_RECV:
1085                         case O_VIA: {
1086                                 const char *dir;
1087                                 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1088
1089                                 if (cmd->opcode == O_XMIT)
1090                                         dir = "xmit";
1091                                 else if (cmd->opcode == O_RECV)
1092                                         dir = "recv";
1093                                 else if (cmd->opcode == O_VIA)
1094                                         dir = "via";
1095                                 else
1096                                         dir = "?huh?";
1097                                 if (cmdif->name[0] == '\0')
1098                                         printf(" %s %s", dir,
1099                                             inet_ntoa(cmdif->p.ip));
1100                                 printf(" %s %s", dir, cmdif->name);
1101                                 }
1102                                 break;
1103
1104                         case O_IPID:
1105                                 printf(" ipid %u", cmd->arg1 );
1106                                 break;
1107
1108                         case O_IPTTL:
1109                                 printf(" ipttl %u", cmd->arg1 );
1110                                 break;
1111
1112                         case O_IPVER:
1113                                 printf(" ipver %u", cmd->arg1 );
1114                                 break;
1115
1116                         case O_IPPRECEDENCE:
1117                                 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1118                                 break;
1119
1120                         case O_IPLEN:
1121                                 printf(" iplen %u", cmd->arg1 );
1122                                 break;
1123
1124                         case O_IPOPT:
1125                                 print_flags("ipoptions", cmd, f_ipopts);
1126                                 break;
1127
1128                         case O_IPTOS:
1129                                 print_flags("iptos", cmd, f_iptos);
1130                                 break;
1131
1132                         case O_ICMPTYPE:
1133                                 print_icmptypes((ipfw_insn_u32 *)cmd);
1134                                 break;
1135
1136                         case O_ESTAB:
1137                                 printf(" established");
1138                                 break;
1139
1140                         case O_TCPFLAGS:
1141                                 print_flags("tcpflags", cmd, f_tcpflags);
1142                                 break;
1143
1144                         case O_TCPOPTS:
1145                                 print_flags("tcpoptions", cmd, f_tcpopts);
1146                                 break;
1147
1148                         case O_TCPWIN:
1149                                 printf(" tcpwin %d", ntohs(cmd->arg1));
1150                                 break;
1151
1152                         case O_TCPACK:
1153                                 printf(" tcpack %u", ntohl(cmd32->d[0]));
1154                                 break;
1155
1156                         case O_TCPSEQ:
1157                                 printf(" tcpseq %u", ntohl(cmd32->d[0]));
1158                                 break;
1159
1160                         case O_UID:
1161                             {
1162                                 struct passwd *pwd = getpwuid(cmd32->d[0]);
1163
1164                                 if (pwd)
1165                                         printf(" uid %s", pwd->pw_name);
1166                                 else
1167                                         printf(" uid %u", cmd32->d[0]);
1168                             }
1169                                 break;
1170
1171                         case O_GID:
1172                             {
1173                                 struct group *grp = getgrgid(cmd32->d[0]);
1174
1175                                 if (grp)
1176                                         printf(" gid %s", grp->gr_name);
1177                                 else
1178                                         printf(" gid %u", cmd32->d[0]);
1179                             }
1180                                 break;
1181
1182                         case O_KEEP_STATE:
1183                                 printf(" keep-state");
1184                                 break;
1185
1186                         case O_LIMIT:
1187                             {
1188                                 struct _s_x *p = limit_masks;
1189                                 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1190                                 u_int8_t x = c->limit_mask;
1191                                 const char *comma = " ";
1192
1193                                 printf(" limit");
1194                                 for ( ; p->x != 0 ; p++)
1195                                         if ((x & p->x) == p->x) {
1196                                                 x &= ~p->x;
1197                                                 printf("%s%s", comma, p->s);
1198                                                 comma = ",";
1199                                         }
1200                                 printf(" %d", c->conn_limit);
1201                             }
1202                                 break;
1203
1204                         default:
1205                                 printf(" [opcode %d len %d]",
1206                                     cmd->opcode, cmd->len);
1207                         }
1208                 }
1209                 if (cmd->len & F_OR) {
1210                         printf(" or");
1211                         or_block = 1;
1212                 } else if (or_block) {
1213                         printf(" }");
1214                         or_block = 0;
1215                 }
1216         }
1217         show_prerequisites(&flags, HAVE_IP, 0);
1218
1219         printf("\n");
1220 }
1221
1222 static void
1223 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth)
1224 {
1225         struct protoent *pe;
1226         struct in_addr a;
1227
1228         if (!do_expired) {
1229                 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1230                         return;
1231         }
1232
1233         printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt,
1234             bcwidth, (uintmax_t)d->bcnt, d->expire);
1235         switch (d->dyn_type) {
1236         case O_LIMIT_PARENT:
1237                 printf(" PARENT %d", d->count);
1238                 break;
1239         case O_LIMIT:
1240                 printf(" LIMIT");
1241                 break;
1242         case O_KEEP_STATE: /* bidir, no mask */
1243                 printf(" STATE");
1244                 break;
1245         }
1246
1247         if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL)
1248                 printf(" %s", pe->p_name);
1249         else
1250                 printf(" proto %u", d->id.u.ip.proto);
1251
1252         a.s_addr = htonl(d->id.u.ip.src_ip);
1253         printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port);
1254
1255         a.s_addr = htonl(d->id.u.ip.dst_ip);
1256         printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port);
1257         printf("\n");
1258 }
1259
1260 static int
1261 sort_q(const void *pa, const void *pb)
1262 {
1263         int rev = (do_sort < 0);
1264         int field = rev ? -do_sort : do_sort;
1265         long long res = 0;
1266         const struct dn_ioc_flowqueue *a = pa;
1267         const struct dn_ioc_flowqueue *b = pb;
1268
1269         switch (field) {
1270         case 1: /* pkts */
1271                 res = a->len - b->len;
1272                 break;
1273         case 2: /* bytes */
1274                 res = a->len_bytes - b->len_bytes;
1275                 break;
1276
1277         case 3: /* tot pkts */
1278                 res = a->tot_pkts - b->tot_pkts;
1279                 break;
1280
1281         case 4: /* tot bytes */
1282                 res = a->tot_bytes - b->tot_bytes;
1283                 break;
1284         }
1285         if (res < 0)
1286                 res = -1;
1287         if (res > 0)
1288                 res = 1;
1289         return (int)(rev ? res : -res);
1290 }
1291
1292 static void
1293 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q)
1294 {
1295         int l;
1296
1297         printf("    mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1298             fs->flow_mask.u.ip.proto,
1299             fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port,
1300             fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port);
1301         if (fs->rq_elements == 0)
1302                 return;
1303
1304         printf("BKT Prot ___Source IP/port____ "
1305             "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1306         if (do_sort != 0)
1307                 heapsort(q, fs->rq_elements, sizeof(*q), sort_q);
1308         for (l = 0; l < fs->rq_elements; l++) {
1309                 struct in_addr ina;
1310                 struct protoent *pe;
1311
1312                 ina.s_addr = htonl(q[l].id.u.ip.src_ip);
1313                 printf("%3d ", q[l].hash_slot);
1314                 pe = getprotobynumber(q[l].id.u.ip.proto);
1315                 if (pe)
1316                         printf("%-4s ", pe->p_name);
1317                 else
1318                         printf("%4u ", q[l].id.u.ip.proto);
1319                 printf("%15s/%-5d ",
1320                     inet_ntoa(ina), q[l].id.u.ip.src_port);
1321                 ina.s_addr = htonl(q[l].id.u.ip.dst_ip);
1322                 printf("%15s/%-5d ",
1323                     inet_ntoa(ina), q[l].id.u.ip.dst_port);
1324                 printf("%4ju %8ju %2u %4u %3u\n",
1325                     (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes,
1326                     q[l].len, q[l].len_bytes, q[l].drops);
1327                 if (verbose)
1328                         printf("   S %20ju  F %20ju\n",
1329                             (uintmax_t)q[l].S, (uintmax_t)q[l].F);
1330         }
1331 }
1332
1333 static void
1334 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix)
1335 {
1336         int l;
1337         char qs[30];
1338         char plr[30];
1339         char red[90];   /* Display RED parameters */
1340
1341         l = fs->qsize;
1342         if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1343                 if (l >= 8192)
1344                         sprintf(qs, "%d KB", l / 1024);
1345                 else
1346                         sprintf(qs, "%d B", l);
1347         } else
1348                 sprintf(qs, "%3d sl.", l);
1349         if (fs->plr)
1350                 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1351         else
1352                 plr[0] = '\0';
1353         if (fs->flags_fs & DN_IS_RED)   /* RED parameters */
1354                 sprintf(red,
1355                     "\n\t  %cRED w_q %f min_th %d max_th %d max_p %f",
1356                     (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1357                     1.0 * fs->w_q / (double)(1 << SCALE_RED),
1358                     SCALE_VAL(fs->min_th),
1359                     SCALE_VAL(fs->max_th),
1360                     1.0 * fs->max_p / (double)(1 << SCALE_RED));
1361         else
1362                 sprintf(red, "droptail");
1363
1364         printf("%s %s%s %d queues (%d buckets) %s\n",
1365             prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1366 }
1367
1368 static void
1369 list_pipes(void *data, int nbytes, int ac, char *av[])
1370 {
1371         u_long rulenum;
1372         void *next = data;
1373         struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data;
1374         struct dn_ioc_flowset *fs;
1375         struct dn_ioc_flowqueue *q;
1376         int l;
1377
1378         if (ac > 0)
1379                 rulenum = strtoul(*av++, NULL, 10);
1380         else
1381                 rulenum = 0;
1382         for (; nbytes >= (int)sizeof(*p); p = (struct dn_ioc_pipe *)next) {
1383                 double b = p->bandwidth;
1384                 char buf[30];
1385                 char prefix[80];
1386
1387                 if (p->fs.fs_type != DN_IS_PIPE)
1388                         break;  /* done with pipes, now queues */
1389
1390                 /*
1391                  * compute length, as pipe have variable size
1392                  */
1393                 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1394                 next = (uint8_t *)p + l;
1395                 nbytes -= l;
1396
1397                 if (rulenum != 0 && rulenum != (u_long)p->pipe_nr)
1398                         continue;
1399
1400                 /*
1401                  * Print rate
1402                  */
1403                 if (b == 0)
1404                         sprintf(buf, "unlimited");
1405                 else if (b >= 1000000)
1406                         sprintf(buf, "%7.3f Mbit/s", b/1000000);
1407                 else if (b >= 1000)
1408                         sprintf(buf, "%7.3f Kbit/s", b/1000);
1409                 else
1410                         sprintf(buf, "%7.3f bit/s ", b);
1411
1412                 sprintf(prefix, "%05d: %s %4d ms ",
1413                     p->pipe_nr, buf, p->delay);
1414                 print_flowset_parms(&p->fs, prefix);
1415                 if (verbose)
1416                         printf("   V %20ju\n", (uintmax_t)p->V >> MY_M);
1417
1418                 q = (struct dn_ioc_flowqueue *)(p+1);
1419                 list_queues(&p->fs, q);
1420         }
1421         for (fs = next; nbytes >= (int)sizeof(*fs); fs = next) {
1422                 char prefix[80];
1423
1424                 if (fs->fs_type != DN_IS_QUEUE)
1425                         break;
1426                 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1427                 next = (uint8_t *)fs + l;
1428                 nbytes -= l;
1429                 q = (struct dn_ioc_flowqueue *)(fs+1);
1430                 sprintf(prefix, "q%05d: weight %d pipe %d ",
1431                     fs->fs_nr, fs->weight, fs->parent_nr);
1432                 print_flowset_parms(fs, prefix);
1433                 list_queues(fs, q);
1434         }
1435 }
1436
1437 /*
1438  * This one handles all set-related commands
1439  *      ipfw set { show | enable | disable }
1440  *      ipfw set swap X Y
1441  *      ipfw set move X to Y
1442  *      ipfw set move rule X to Y
1443  */
1444 static void
1445 sets_handler(int ac, char *av[])
1446 {
1447         u_int32_t set_disable, masks[2];
1448         int i, nbytes;
1449         u_int16_t rulenum;
1450         u_int8_t cmd, new_set;
1451
1452         ac--;
1453         av++;
1454
1455         if (!ac)
1456                 errx(EX_USAGE, "set needs command");
1457         if (!strncmp(*av, "show", strlen(*av)) ) {
1458                 void *data;
1459                 const char *msg;
1460
1461                 nbytes = sizeof(struct ipfw_ioc_rule);
1462                 if ((data = malloc(nbytes)) == NULL)
1463                         err(EX_OSERR, "malloc");
1464                 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1465                         err(EX_OSERR, "getsockopt(IP_FW_GET)");
1466                 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable;
1467
1468                 for (i = 0, msg = "disable" ; i < 31; i++)
1469                         if (  (set_disable & (1<<i))) {
1470                                 printf("%s %d", msg, i);
1471                                 msg = "";
1472                         }
1473                 msg = (set_disable) ? " enable" : "enable";
1474                 for (i = 0; i < 31; i++)
1475                         if ( !(set_disable & (1<<i))) {
1476                                 printf("%s %d", msg, i);
1477                                 msg = "";
1478                         }
1479                 printf("\n");
1480         } else if (!strncmp(*av, "swap", strlen(*av))) {
1481                 ac--; av++;
1482                 if (ac != 2)
1483                         errx(EX_USAGE, "set swap needs 2 set numbers\n");
1484                 rulenum = atoi(av[0]);
1485                 new_set = atoi(av[1]);
1486                 if (!isdigit(*(av[0])) || rulenum > 30)
1487                         errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1488                 if (!isdigit(*(av[1])) || new_set > 30)
1489                         errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1490                 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1491                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1492                         masks, sizeof(u_int32_t));
1493         } else if (!strncmp(*av, "move", strlen(*av))) {
1494                 ac--; av++;
1495                 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1496                         cmd = 2;
1497                         ac--; av++;
1498                 } else
1499                         cmd = 3;
1500                 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1501                         errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1502                 rulenum = atoi(av[0]);
1503                 new_set = atoi(av[2]);
1504                 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1505                         (cmd == 2 && rulenum == 65535) )
1506                         errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1507                 if (!isdigit(*(av[2])) || new_set > 30)
1508                         errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1509                 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1510                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1511                         masks, sizeof(u_int32_t));
1512         } else if (!strncmp(*av, "disable", strlen(*av)) ||
1513                    !strncmp(*av, "enable",  strlen(*av)) ) {
1514                 int which = !strncmp(*av, "enable",  strlen(*av)) ? 1 : 0;
1515
1516                 ac--; av++;
1517                 masks[0] = masks[1] = 0;
1518
1519                 while (ac) {
1520                         if (isdigit(**av)) {
1521                                 i = atoi(*av);
1522                                 if (i < 0 || i > 30)
1523                                         errx(EX_DATAERR,
1524                                             "invalid set number %d\n", i);
1525                                 masks[which] |= (1<<i);
1526                         } else if (!strncmp(*av, "disable", strlen(*av)))
1527                                 which = 0;
1528                         else if (!strncmp(*av, "enable", strlen(*av)))
1529                                 which = 1;
1530                         else
1531                                 errx(EX_DATAERR,
1532                                         "invalid set command %s\n", *av);
1533                         av++; ac--;
1534                 }
1535                 if ( (masks[0] & masks[1]) != 0 )
1536                         errx(EX_DATAERR,
1537                             "cannot enable and disable the same set\n");
1538
1539                 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1540                 if (i)
1541                         warn("set enable/disable: setsockopt(IP_FW_DEL)");
1542         } else
1543                 errx(EX_USAGE, "invalid set command %s\n", *av);
1544 }
1545
1546 static void
1547 sysctl_handler(int ac, char *av[], int which)
1548 {
1549         ac--;
1550         av++;
1551
1552         if (*av == NULL) {
1553                 warnx("missing keyword to enable/disable\n");
1554         } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1555                 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1556                     &which, sizeof(which));
1557         } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1558                 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1559                     &which, sizeof(which));
1560         } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1561                 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1562                     &which, sizeof(which));
1563         } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1564                 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1565                     &which, sizeof(which));
1566         } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1567                 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1568                     &which, sizeof(which));
1569         } else {
1570                 warnx("unrecognize enable/disable keyword: %s\n", *av);
1571         }
1572 }
1573
1574 static void
1575 list(int ac, char *av[])
1576 {
1577         struct ipfw_ioc_rule *r;
1578         struct ipfw_ioc_state *dynrules, *d;
1579
1580         void *data = NULL;
1581         int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1582         int exitval = EX_OK;
1583         int lac;
1584         char **lav;
1585         u_long rnum;
1586         char *endptr;
1587         int seen = 0;
1588
1589         const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1590         int nalloc = 1024;      /* start somewhere... */
1591
1592         ac--;
1593         av++;
1594
1595         /* get rules or pipes from kernel, resizing array as necessary */
1596         nbytes = nalloc;
1597
1598         while (nbytes >= nalloc) {
1599                 nalloc = nalloc * 2 + 200;
1600                 nbytes = nalloc;
1601                 if ((data = realloc(data, nbytes)) == NULL)
1602                         err(EX_OSERR, "realloc");
1603                 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1604                         err(EX_OSERR, "getsockopt(IP_%s_GET)",
1605                                 do_pipe ? "DUMMYNET" : "FW");
1606         }
1607
1608         if (do_pipe) {
1609                 list_pipes(data, nbytes, ac, av);
1610                 goto done;
1611         }
1612
1613         /*
1614          * Count static rules.
1615          */
1616         r = data;
1617         nstat = r->static_count;
1618
1619         /*
1620          * Count dynamic rules. This is easier as they have
1621          * fixed size.
1622          */
1623         dynrules = (struct ipfw_ioc_state *)((uint8_t *)r + r->static_len);
1624         ndyn = (nbytes - r->static_len) / sizeof(*dynrules);
1625
1626         /* if showing stats, figure out column widths ahead of time */
1627         bcwidth = pcwidth = 0;
1628         if (do_acct) {
1629                 for (n = 0, r = data; n < nstat; n++,
1630                 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) {
1631                         /* packet counter */
1632                         width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt);
1633                         if (width > pcwidth)
1634                                 pcwidth = width;
1635
1636                         /* byte counter */
1637                         width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt);
1638                         if (width > bcwidth)
1639                                 bcwidth = width;
1640                 }
1641         }
1642         if (do_dynamic && ndyn) {
1643                 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1644                         width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt);
1645                         if (width > pcwidth)
1646                                 pcwidth = width;
1647
1648                         width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt);
1649                         if (width > bcwidth)
1650                                 bcwidth = width;
1651                 }
1652         }
1653         /* if no rule numbers were specified, list all rules */
1654         if (ac == 0) {
1655                 for (n = 0, r = data; n < nstat; n++,
1656                 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r)))
1657                         show_ipfw(r, pcwidth, bcwidth);
1658
1659                 if (do_dynamic && ndyn) {
1660                         printf("## Dynamic rules (%d):\n", ndyn);
1661                         for (n = 0, d = dynrules; n < ndyn; n++, d++)
1662                                 show_dyn_ipfw(d, pcwidth, bcwidth);
1663                 }
1664                 goto done;
1665         }
1666
1667         /* display specific rules requested on command line */
1668
1669         for (lac = ac, lav = av; lac != 0; lac--) {
1670                 /* convert command line rule # */
1671                 rnum = strtoul(*lav++, &endptr, 10);
1672                 if (*endptr) {
1673                         exitval = EX_USAGE;
1674                         warnx("invalid rule number: %s", *(lav - 1));
1675                         continue;
1676                 }
1677                 for (n = seen = 0, r = data; n < nstat; n++,
1678                 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) {
1679                         if (r->rulenum > rnum)
1680                                 break;
1681                         if (r->rulenum == rnum) {
1682                                 show_ipfw(r, pcwidth, bcwidth);
1683                                 seen = 1;
1684                         }
1685                 }
1686                 if (!seen) {
1687                         /* give precedence to other error(s) */
1688                         if (exitval == EX_OK)
1689                                 exitval = EX_UNAVAILABLE;
1690                         warnx("rule %lu does not exist", rnum);
1691                 }
1692         }
1693
1694         if (do_dynamic && ndyn) {
1695                 printf("## Dynamic rules:\n");
1696                 for (lac = ac, lav = av; lac != 0; lac--) {
1697                         rnum = strtoul(*lav++, &endptr, 10);
1698                         if (*endptr)
1699                                 /* already warned */
1700                                 continue;
1701                         for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1702                                 if (d->rulenum > rnum)
1703                                         break;
1704                                 if (d->rulenum == rnum)
1705                                         show_dyn_ipfw(d, pcwidth, bcwidth);
1706                         }
1707                 }
1708         }
1709
1710         ac = 0;
1711
1712 done:
1713         free(data);
1714
1715         if (exitval != EX_OK)
1716                 exit(exitval);
1717 }
1718
1719 static void
1720 show_usage(void)
1721 {
1722         fprintf(stderr, "usage: ipfw [options]\n"
1723 "    add [number] rule\n"
1724 "    pipe number config [pipeconfig]\n"
1725 "    queue number config [queueconfig]\n"
1726 "    [pipe] flush\n"
1727 "    [pipe] delete number ...\n"
1728 "    [pipe] {list|show} [number ...]\n"
1729 "    {zero|resetlog} [number ...]\n"
1730 "do \"ipfw -h\" or see ipfw manpage for details\n"
1731 );
1732
1733         exit(EX_USAGE);
1734 }
1735
1736 static void
1737 help(void)
1738 {
1739
1740         fprintf(stderr, "ipfw syntax summary:\n"
1741 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1742 "ipfw {pipe|queue} N config BODY\n"
1743 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1744 "\n"
1745 "RULE:          [1..] [PROB] BODY\n"
1746 "RULENUM:       INTEGER(1..65534)\n"
1747 "PROB:          prob REAL(0..1)\n"
1748 "BODY:          check-state [LOG] (no body) |\n"
1749 "               ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1750 "ACTION:        check-state | allow | count | deny | reject | skipto N |\n"
1751 "               {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1752 "ADDR:          [ MAC dst src ether_type ] \n"
1753 "               [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1754 "IPLIST:        IPADDR | ( IPADDR or ... or IPADDR )\n"
1755 "IPADDR:        [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1756 "OPTION_LIST:   OPTION [,OPTION_LIST]\n"
1757 );
1758 exit(0);
1759 }
1760
1761
1762 static int
1763 lookup_host (char *host, struct in_addr *ipaddr)
1764 {
1765         struct hostent *he;
1766
1767         if (!inet_aton(host, ipaddr)) {
1768                 if ((he = gethostbyname(host)) == NULL)
1769                         return(-1);
1770                 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1771         }
1772         return(0);
1773 }
1774
1775 /*
1776  * fills the addr and mask fields in the instruction as appropriate from av.
1777  * Update length as appropriate.
1778  * The following formats are allowed:
1779  *      any     matches any IP. Actually returns an empty instruction.
1780  *      me      returns O_IP_*_ME
1781  *      1.2.3.4         single IP address
1782  *      1.2.3.4:5.6.7.8 address:mask
1783  *      1.2.3.4/24      address/mask
1784  *      1.2.3.4/26{1,6,5,4,23}  set of addresses in a subnet
1785  */
1786 static void
1787 fill_ip(ipfw_insn_ip *cmd, char *av)
1788 {
1789         char *p = NULL, md = 0;
1790         u_int32_t i;
1791
1792         cmd->o.len &= ~F_LEN_MASK;      /* zero len */
1793
1794         if (!strncmp(av, "any", strlen(av)))
1795                 return;
1796
1797         if (!strncmp(av, "me", strlen(av))) {
1798                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1799                 return;
1800         }
1801
1802         if (strlen(av) >= 3 && av[0] == '<' && av[strlen(av) - 1] == '>') {
1803                 int pos = strlen(av) - 1;
1804                 uint16_t tableid;
1805                 char *eptr;
1806
1807                 /*
1808                  * Table: "<tableid>"
1809                  */
1810                 av[pos] = '\0';
1811                 tableid = strtoul(&av[1], &eptr, 0);
1812                 if (*eptr != '\0') {
1813                         av[pos] = '>';
1814                         errx(EX_DATAERR, "invalid tableid ``%s''", av);
1815                 }
1816                 av[pos] = '>';
1817                 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1818                 cmd->o.opcode = O_IP_DST_TABLE;
1819                 cmd->o.arg1 = tableid;
1820                 return;
1821         }
1822
1823         p = strchr(av, '/');
1824         if (!p)
1825                 p = strchr(av, ':');
1826         if (p) {
1827                 md = *p;
1828                 *p++ = '\0';
1829         }
1830
1831         if (lookup_host(av, &cmd->addr) != 0)
1832                 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1833         switch (md) {
1834         case ':':
1835                 if (!inet_aton(p, &cmd->mask))
1836                         errx(EX_DATAERR, "bad netmask ``%s''", p);
1837                 break;
1838         case '/':
1839                 i = atoi(p);
1840                 if (i == 0)
1841                         cmd->mask.s_addr = htonl(0);
1842                 else if (i > 32)
1843                         errx(EX_DATAERR, "bad width ``%s''", p);
1844                 else
1845                         cmd->mask.s_addr = htonl(~0 << (32 - i));
1846                 break;
1847         default:
1848                 cmd->mask.s_addr = htonl(~0);
1849                 break;
1850         }
1851         cmd->addr.s_addr &= cmd->mask.s_addr;
1852         /*
1853          * now look if we have a set of addresses. They are stored as follows:
1854          *   arg1       is the set size (powers of 2, 2..256)
1855          *   addr       is the base address IN HOST FORMAT
1856          *   mask..     is an array of u_int32_t with bits set.
1857          */
1858         if (p)
1859                 p = strchr(p, '{');
1860         if (p) {        /* fetch addresses */
1861                 u_int32_t *d;
1862                 int low, high;
1863                 int ii = contigmask((u_char *)&(cmd->mask), 32);
1864
1865                 if (ii < 24 || ii > 31) {
1866                         fprintf(stderr, "invalid set with mask %d\n",
1867                                 ii);
1868                         exit(0);
1869                 }
1870                 cmd->o.arg1 = 1<<(32-ii);
1871                 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1872                 d = (u_int32_t *)&cmd->mask;
1873                 cmd->o.opcode = O_IP_DST_SET;   /* default */
1874                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1875                 for (ii = 0; ii < (cmd->o.arg1+31)/32 ; ii++)
1876                         d[ii] = 0;      /* clear masks */
1877
1878                 av = p+1;
1879                 low = cmd->addr.s_addr & 0xff;
1880                 high = low + cmd->o.arg1 - 1;
1881                 while (isdigit(*av)) {
1882                         char *str;
1883                         u_int16_t a = strtol(av, &str, 0);
1884
1885                         if (str == av) /* no parameter */
1886                                 break;
1887                         if (a < low || a > high) {
1888                             fprintf(stderr, "addr %d out of range [%d-%d]\n",
1889                                 a, low, high);
1890                             exit(0);
1891                         }
1892                         a -= low;
1893                         d[ a/32] |= 1<<(a & 31);
1894                         if (*str != ',')
1895                                 break;
1896                         av = str+1;
1897                 }
1898                 return;
1899         }
1900
1901         if (cmd->mask.s_addr == 0) { /* any */
1902                 if (cmd->o.len & F_NOT)
1903                         errx(EX_DATAERR, "not any never matches");
1904                 else    /* useless, nuke it */
1905                         return;
1906         } else if (cmd->mask.s_addr ==  IP_MASK_ALL)    /* one IP */
1907                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1908         else                                            /* addr/mask */
1909                 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1910 }
1911
1912
1913 /*
1914  * helper function to process a set of flags and set bits in the
1915  * appropriate masks.
1916  */
1917 static void
1918 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1919         struct _s_x *flags, char *p)
1920 {
1921         u_int8_t set=0, clear=0;
1922
1923         while (p && *p) {
1924                 char *q;        /* points to the separator */
1925                 int val;
1926                 u_int8_t *which;        /* mask we are working on */
1927
1928                 if (*p == '!') {
1929                         p++;
1930                         which = &clear;
1931                 } else
1932                         which = &set;
1933                 q = strchr(p, ',');
1934                 if (q)
1935                         *q++ = '\0';
1936                 val = match_token(flags, p);
1937                 if (val <= 0)
1938                         errx(EX_DATAERR, "invalid flag %s", p);
1939                 *which |= (u_int8_t)val;
1940                 p = q;
1941         }
1942         cmd->opcode = opcode;
1943         cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
1944         cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
1945 }
1946
1947
1948 static void
1949 delete(int ac, char *av[])
1950 {
1951         u_int32_t rulenum;
1952         struct dn_ioc_pipe pipe;
1953         int i;
1954         int exitval = EX_OK;
1955         int do_set = 0;
1956
1957         memset(&pipe, 0, sizeof pipe);
1958
1959         av++; ac--;
1960         if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
1961                 do_set = 1;     /* delete set */
1962                 ac--; av++;
1963         }
1964
1965         /* Rule number */
1966         while (ac && isdigit(**av)) {
1967                 i = atoi(*av); av++; ac--;
1968                 if (do_pipe) {
1969                         if (do_pipe == 1)
1970                                 pipe.pipe_nr = i;
1971                         else
1972                                 pipe.fs.fs_nr = i;
1973                         i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
1974                             &pipe, sizeof pipe);
1975                         if (i) {
1976                                 exitval = 1;
1977                                 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
1978                                     do_pipe == 1 ? pipe.pipe_nr :
1979                                     pipe.fs.fs_nr);
1980                         }
1981                 } else {
1982                         rulenum =  (i & 0xffff) | (do_set << 24);
1983                         i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
1984                             sizeof rulenum);
1985                         if (i) {
1986                                 exitval = EX_UNAVAILABLE;
1987                                 warn("rule %u: setsockopt(IP_FW_DEL)",
1988                                     rulenum);
1989                         }
1990                 }
1991         }
1992         if (exitval != EX_OK)
1993                 exit(exitval);
1994 }
1995
1996
1997 /*
1998  * fill the interface structure. We do not check the name as we can
1999  * create interfaces dynamically, so checking them at insert time
2000  * makes relatively little sense.
2001  * Interface names containing '*', '?', or '[' are assumed to be shell 
2002  * patterns which match interfaces.
2003  */
2004 static void
2005 fill_iface(ipfw_insn_if *cmd, char *arg)
2006 {
2007         cmd->name[0] = '\0';
2008         cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2009
2010         /* Parse the interface or address */
2011         if (!strcmp(arg, "any"))
2012                 cmd->o.len = 0;         /* effectively ignore this command */
2013         else if (!isdigit(*arg)) {
2014                 strlcpy(cmd->name, arg, sizeof(cmd->name));
2015                 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2016         } else if (!inet_aton(arg, &cmd->p.ip))
2017                 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2018 }
2019
2020 static unsigned long
2021 getbw(const char *str, u_short *flags, int kb)
2022 {
2023     char *end;
2024     unsigned long val;
2025     int inbytes = 0;
2026
2027     val = strtoul(str, &end, 0);
2028     if (*end == 'k' || *end == 'K') {
2029         ++end;
2030         val *= kb;
2031     } else if (*end == 'm' || *end == 'M') {
2032         ++end;
2033         val *= kb * kb;
2034     }
2035
2036     /*
2037      * Deal with bits or bytes or b(bits) or B(bytes).  If there is no
2038      * trailer assume bits.
2039      */
2040     if (strncasecmp(end, "bit", 3) == 0) {
2041         ;
2042     } else if (strncasecmp(end, "byte", 4) == 0) {
2043         inbytes = 1;
2044     } else if (*end == 'b') {
2045         ;
2046     } else if (*end == 'B') {
2047         inbytes = 1;
2048     }
2049
2050     /*
2051      * Return in bits if flags is NULL, else flag bits
2052      * or bytes in flags and return the unconverted value.
2053      */
2054     if (inbytes && flags)
2055         *flags |= DN_QSIZE_IS_BYTES;
2056     else if (inbytes && flags == NULL)
2057         val *= 8;
2058     return(val);
2059 }
2060
2061 /*
2062  * the following macro returns an error message if we run out of
2063  * arguments.
2064  */
2065 #define NEED1(msg)      {if (!ac) errx(EX_USAGE, msg);}
2066
2067 static void
2068 config_pipe(int ac, char **av)
2069 {
2070         struct dn_ioc_pipe pipe;
2071         int i;
2072         char *end;
2073         u_int32_t a;
2074
2075         memset(&pipe, 0, sizeof pipe);
2076
2077         av++; ac--;
2078         /* Pipe number */
2079         if (ac && isdigit(**av)) {
2080                 i = atoi(*av); av++; ac--;
2081                 if (do_pipe == 1)
2082                         pipe.pipe_nr = i;
2083                 else
2084                         pipe.fs.fs_nr = i;
2085         }
2086         while (ac > 0) {
2087                 double d;
2088                 int tok = match_token(dummynet_params, *av);
2089                 ac--; av++;
2090
2091                 switch(tok) {
2092                 case TOK_NOERROR:
2093                         pipe.fs.flags_fs |= DN_NOERROR;
2094                         break;
2095
2096                 case TOK_PLR:
2097                         NEED1("plr needs argument 0..1\n");
2098                         d = strtod(av[0], NULL);
2099                         if (d > 1)
2100                                 d = 1;
2101                         else if (d < 0)
2102                                 d = 0;
2103                         pipe.fs.plr = (int)(d*0x7fffffff);
2104                         ac--; av++;
2105                         break;
2106
2107                 case TOK_QUEUE:
2108                         NEED1("queue needs queue size\n");
2109                         end = NULL;
2110                         pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2111                         ac--; av++;
2112                         break;
2113
2114                 case TOK_BUCKETS:
2115                         NEED1("buckets needs argument\n");
2116                         pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2117                         ac--; av++;
2118                         break;
2119
2120                 case TOK_MASK:
2121                         NEED1("mask needs mask specifier\n");
2122                         /*
2123                          * per-flow queue, mask is dst_ip, dst_port,
2124                          * src_ip, src_port, proto measured in bits
2125                          */
2126
2127                         pipe.fs.flow_mask.type = ETHERTYPE_IP;
2128                         pipe.fs.flow_mask.u.ip.dst_ip = 0;
2129                         pipe.fs.flow_mask.u.ip.src_ip = 0;
2130                         pipe.fs.flow_mask.u.ip.dst_port = 0;
2131                         pipe.fs.flow_mask.u.ip.src_port = 0;
2132                         pipe.fs.flow_mask.u.ip.proto = 0;
2133                         end = NULL;
2134
2135                         while (ac >= 1) {
2136                             u_int32_t *p32 = NULL;
2137                             u_int16_t *p16 = NULL;
2138
2139                             tok = match_token(dummynet_params, *av);
2140                             ac--; av++;
2141                             switch(tok) {
2142                             case TOK_ALL:
2143                                     /*
2144                                      * special case, all bits significant
2145                                      */
2146                                     pipe.fs.flow_mask.u.ip.dst_ip = ~0;
2147                                     pipe.fs.flow_mask.u.ip.src_ip = ~0;
2148                                     pipe.fs.flow_mask.u.ip.dst_port = ~0;
2149                                     pipe.fs.flow_mask.u.ip.src_port = ~0;
2150                                     pipe.fs.flow_mask.u.ip.proto = ~0;
2151                                     pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2152                                     goto end_mask;
2153
2154                             case TOK_DSTIP:
2155                                     p32 = &pipe.fs.flow_mask.u.ip.dst_ip;
2156                                     break;
2157
2158                             case TOK_SRCIP:
2159                                     p32 = &pipe.fs.flow_mask.u.ip.src_ip;
2160                                     break;
2161
2162                             case TOK_DSTPORT:
2163                                     p16 = &pipe.fs.flow_mask.u.ip.dst_port;
2164                                     break;
2165
2166                             case TOK_SRCPORT:
2167                                     p16 = &pipe.fs.flow_mask.u.ip.src_port;
2168                                     break;
2169
2170                             case TOK_PROTO:
2171                                     break;
2172
2173                             default:
2174                                     ac++; av--; /* backtrack */
2175                                     goto end_mask;
2176                             }
2177                             if (ac < 1)
2178                                     errx(EX_USAGE, "mask: value missing");
2179                             if (*av[0] == '/') {
2180                                     a = strtoul(av[0]+1, &end, 0);
2181                                     a = (a == 32) ? ~0 : (1 << a) - 1;
2182                             } else
2183                                     a = strtoul(av[0], &end, 0);
2184                             if (p32 != NULL)
2185                                     *p32 = a;
2186                             else if (p16 != NULL) {
2187                                     if (a > 65535)
2188                                             errx(EX_DATAERR,
2189                                                 "mask: must be 16 bit");
2190                                     *p16 = (u_int16_t)a;
2191                             } else {
2192                                     if (a > 255)
2193                                             errx(EX_DATAERR,
2194                                                 "mask: must be 8 bit");
2195                                     pipe.fs.flow_mask.u.ip.proto = (uint8_t)a;
2196                             }
2197                             if (a != 0)
2198                                     pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2199                             ac--; av++;
2200                         } /* end while, config masks */
2201 end_mask:
2202                         break;
2203
2204                 case TOK_RED:
2205                 case TOK_GRED:
2206                         NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2207                         pipe.fs.flags_fs |= DN_IS_RED;
2208                         if (tok == TOK_GRED)
2209                                 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2210                         /*
2211                          * the format for parameters is w_q/min_th/max_th/max_p
2212                          */
2213                         if ((end = strsep(&av[0], "/"))) {
2214                             double w_q = strtod(end, NULL);
2215                             if (w_q > 1 || w_q <= 0)
2216                                 errx(EX_DATAERR, "0 < w_q <= 1");
2217                             pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2218                         }
2219                         if ((end = strsep(&av[0], "/"))) {
2220                             pipe.fs.min_th = strtoul(end, &end, 0);
2221                             if (*end == 'K' || *end == 'k')
2222                                 pipe.fs.min_th *= 1024;
2223                         }
2224                         if ((end = strsep(&av[0], "/"))) {
2225                             pipe.fs.max_th = strtoul(end, &end, 0);
2226                             if (*end == 'K' || *end == 'k')
2227                                 pipe.fs.max_th *= 1024;
2228                         }
2229                         if ((end = strsep(&av[0], "/"))) {
2230                             double max_p = strtod(end, NULL);
2231                             if (max_p > 1 || max_p <= 0)
2232                                 errx(EX_DATAERR, "0 < max_p <= 1");
2233                             pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2234                         }
2235                         ac--; av++;
2236                         break;
2237
2238                 case TOK_DROPTAIL:
2239                         pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2240                         break;
2241
2242                 case TOK_BW:
2243                         NEED1("bw needs bandwidth\n");
2244                         if (do_pipe != 1)
2245                             errx(EX_DATAERR, "bandwidth only valid for pipes");
2246                         /*
2247                          * set bandwidth value
2248                          */
2249                         pipe.bandwidth = getbw(av[0], NULL, 1000);
2250                         if (pipe.bandwidth < 0)
2251                             errx(EX_DATAERR, "bandwidth too large");
2252                         ac--; av++;
2253                         break;
2254
2255                 case TOK_DELAY:
2256                         if (do_pipe != 1)
2257                                 errx(EX_DATAERR, "delay only valid for pipes");
2258                         NEED1("delay needs argument 0..10000ms\n");
2259                         pipe.delay = strtoul(av[0], NULL, 0);
2260                         ac--; av++;
2261                         break;
2262
2263                 case TOK_WEIGHT:
2264                         if (do_pipe == 1)
2265                                 errx(EX_DATAERR,"weight only valid for queues");
2266                         NEED1("weight needs argument 0..100\n");
2267                         pipe.fs.weight = strtoul(av[0], &end, 0);
2268                         ac--; av++;
2269                         break;
2270
2271                 case TOK_PIPE:
2272                         if (do_pipe == 1)
2273                                 errx(EX_DATAERR,"pipe only valid for queues");
2274                         NEED1("pipe needs pipe_number\n");
2275                         pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2276                         ac--; av++;
2277                         break;
2278
2279                 default:
2280                         errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2281                 }
2282         }
2283         if (do_pipe == 1) {
2284                 if (pipe.pipe_nr == 0)
2285                         errx(EX_DATAERR, "pipe_nr must be > 0");
2286                 if (pipe.delay > 10000)
2287                         errx(EX_DATAERR, "delay must be < 10000");
2288         } else { /* do_pipe == 2, queue */
2289                 if (pipe.fs.parent_nr == 0)
2290                         errx(EX_DATAERR, "pipe must be > 0");
2291                 if (pipe.fs.weight >100)
2292                         errx(EX_DATAERR, "weight must be <= 100");
2293         }
2294         if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2295                 if (pipe.fs.qsize > 1024*1024)
2296                         errx(EX_DATAERR, "queue size must be < 1MB");
2297         } else {
2298                 if (pipe.fs.qsize > 100)
2299                         errx(EX_DATAERR, "2 <= queue size <= 100");
2300         }
2301         if (pipe.fs.flags_fs & DN_IS_RED) {
2302                 size_t len;
2303                 int lookup_depth, avg_pkt_size;
2304                 double step, idle, weight, w_q;
2305                 int clock_hz;
2306                 int t;
2307
2308                 if (pipe.fs.min_th >= pipe.fs.max_th)
2309                     errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2310                         pipe.fs.min_th, pipe.fs.max_th);
2311                 if (pipe.fs.max_th == 0)
2312                     errx(EX_DATAERR, "max_th must be > 0");
2313
2314                 len = sizeof(int);
2315                 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2316                         &lookup_depth, &len, NULL, 0) == -1)
2317
2318                     errx(1, "sysctlbyname(\"%s\")",
2319                         "net.inet.ip.dummynet.red_lookup_depth");
2320                 if (lookup_depth == 0)
2321                     errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2322                         " must be greater than zero");
2323
2324                 len = sizeof(int);
2325                 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2326                         &avg_pkt_size, &len, NULL, 0) == -1)
2327
2328                     errx(1, "sysctlbyname(\"%s\")",
2329                         "net.inet.ip.dummynet.red_avg_pkt_size");
2330                 if (avg_pkt_size == 0)
2331                         errx(EX_DATAERR,
2332                             "net.inet.ip.dummynet.red_avg_pkt_size must"
2333                             " be greater than zero");
2334
2335                 len = sizeof(clock_hz);
2336                 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len,
2337                                  NULL, 0) == -1) {
2338                         errx(1, "sysctlbyname(\"%s\")",
2339                              "net.inet.ip.dummynet.hz");
2340                 }
2341
2342                 /*
2343                  * Ticks needed for sending a medium-sized packet.
2344                  * Unfortunately, when we are configuring a WF2Q+ queue, we
2345                  * do not have bandwidth information, because that is stored
2346                  * in the parent pipe, and also we have multiple queues
2347                  * competing for it. So we set step=0, which is not very
2348                  * correct. But on the other hand, why do we want RED with
2349                  * WF2Q+ ?
2350                  */
2351                 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2352                         step = 0;
2353                 else
2354                         step = clock_hz * avg_pkt_size * 8 / pipe.bandwidth;
2355
2356                 /*
2357                  * max idle time (in ticks) before avg queue size becomes 0.
2358                  * NOTA:  (3/w_q) is approx the value x so that
2359                  * (1-w_q)^x < 10^-3.
2360                  */
2361                 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2362                 idle = step * 3. / w_q;
2363                 pipe.fs.lookup_step = (int)idle / lookup_depth;
2364                 if (!pipe.fs.lookup_step)
2365                         pipe.fs.lookup_step = 1;
2366                 weight = 1 - w_q;
2367                 for (t = pipe.fs.lookup_step; t > 0; --t)
2368                         weight *= weight;
2369                 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2370         }
2371         i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2372                             sizeof pipe);
2373         if (i)
2374                 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2375 }
2376
2377 static void
2378 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2379 {
2380         int i, l;
2381
2382         for (i=0; i<6; i++)
2383                 addr[i] = mask[i] = 0;
2384         if (!strcmp(p, "any"))
2385                 return;
2386
2387         for (i=0; *p && i<6;i++, p++) {
2388                 addr[i] = strtol(p, &p, 16);
2389                 if (*p != ':') /* we start with the mask */
2390                         break;
2391         }
2392         if (*p == '/') { /* mask len */
2393                 l = strtol(p+1, &p, 0);
2394                 for (i=0; l>0; l -=8, i++)
2395                         mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2396         } else if (*p == '&') { /* mask */
2397                 for (i=0, p++; *p && i<6;i++, p++) {
2398                         mask[i] = strtol(p, &p, 16);
2399                         if (*p != ':')
2400                                 break;
2401                 }
2402         } else if (*p == '\0') {
2403                 for (i=0; i<6; i++)
2404                         mask[i] = 0xff;
2405         }
2406         for (i=0; i<6; i++)
2407                 addr[i] &= mask[i];
2408 }
2409
2410 /*
2411  * helper function, updates the pointer to cmd with the length
2412  * of the current command, and also cleans up the first word of
2413  * the new command in case it has been clobbered before.
2414  */
2415 static ipfw_insn *
2416 next_cmd(ipfw_insn *cmd)
2417 {
2418         cmd += F_LEN(cmd);
2419         bzero(cmd, sizeof(*cmd));
2420         return cmd;
2421 }
2422
2423 /*
2424  * A function to fill simple commands of size 1.
2425  * Existing flags are preserved.
2426  */
2427 static void
2428 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2429 {
2430         cmd->opcode = opcode;
2431         cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2432         cmd->arg1 = arg;
2433 }
2434
2435 /*
2436  * Fetch and add the MAC address and type, with masks. This generates one or
2437  * two microinstructions, and returns the pointer to the last one.
2438  */
2439 static ipfw_insn *
2440 add_mac(ipfw_insn *cmd, int ac, char *av[])
2441 {
2442         ipfw_insn_mac *mac;
2443
2444         if (ac < 2)
2445                 errx(EX_DATAERR, "MAC dst src");
2446
2447         cmd->opcode = O_MACADDR2;
2448         cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2449
2450         mac = (ipfw_insn_mac *)cmd;
2451         get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2452         get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2453         return cmd;
2454 }
2455
2456 static ipfw_insn *
2457 add_mactype(ipfw_insn *cmd, int ac, char *av)
2458 {
2459         if (ac < 1)
2460                 errx(EX_DATAERR, "missing MAC type");
2461         if (strcmp(av, "any") != 0) { /* we have a non-null type */
2462                 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2463                 cmd->opcode = O_MAC_TYPE;
2464                 return cmd;
2465         } else
2466                 return NULL;
2467 }
2468
2469 static ipfw_insn *
2470 add_proto(ipfw_insn *cmd, char *av)
2471 {
2472         struct protoent *pe;
2473         u_char proto = 0;
2474
2475         if (!strncmp(av, "all", strlen(av)))
2476                 ; /* same as "ip" */
2477         else if ((proto = atoi(av)) > 0)
2478                 ; /* all done! */
2479         else if ((pe = getprotobyname(av)) != NULL)
2480                 proto = pe->p_proto;
2481         else
2482                 return NULL;
2483         if (proto != IPPROTO_IP)
2484                 fill_cmd(cmd, O_PROTO, 0, proto);
2485         return cmd;
2486 }
2487
2488 static ipfw_insn *
2489 add_srcip(ipfw_insn *cmd, char *av)
2490 {
2491         fill_ip((ipfw_insn_ip *)cmd, av);
2492         if (cmd->opcode == O_IP_DST_SET)                        /* set */
2493                 cmd->opcode = O_IP_SRC_SET;
2494         else if (cmd->opcode == O_IP_DST_TABLE)                 /* table */
2495                 cmd->opcode = O_IP_SRC_TABLE;
2496         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
2497                 cmd->opcode = O_IP_SRC_ME;
2498         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
2499                 cmd->opcode = O_IP_SRC;
2500         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip))       /* addr/mask */
2501                 cmd->opcode = O_IP_SRC_MASK;
2502         return cmd;
2503 }
2504
2505 static ipfw_insn *
2506 add_dstip(ipfw_insn *cmd, char *av)
2507 {
2508         fill_ip((ipfw_insn_ip *)cmd, av);
2509         if (cmd->opcode == O_IP_DST_SET)                        /* set */
2510                 ;
2511         else if (cmd->opcode == O_IP_DST_TABLE)                 /* table */
2512                 ;
2513         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))          /* me */
2514                 cmd->opcode = O_IP_DST_ME;
2515         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))      /* one IP */
2516                 cmd->opcode = O_IP_DST;
2517         else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip))       /* addr/mask */
2518                 cmd->opcode = O_IP_DST_MASK;
2519         return cmd;
2520 }
2521
2522 static ipfw_insn *
2523 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2524 {
2525         if (!strncmp(av, "any", strlen(av))) {
2526                 return NULL;
2527         } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2528                 /* XXX todo: check that we have a protocol with ports */
2529                 cmd->opcode = opcode;
2530                 return cmd;
2531         }
2532         return NULL;
2533 }
2534
2535 /*
2536  * Parse arguments and assemble the microinstructions which make up a rule.
2537  * Rules are added into the 'rulebuf' and then copied in the correct order
2538  * into the actual rule.
2539  *
2540  * The syntax for a rule starts with the action, followed by an
2541  * optional log action, and the various match patterns.
2542  * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2543  * (generated if the rule includes a keep-state option), then the
2544  * various match patterns, the "log" action, and the actual action.
2545  *
2546  */
2547 static void
2548 add(int ac, char *av[])
2549 {
2550         /*
2551          * rules are added into the 'rulebuf' and then copied in
2552          * the correct order into the actual rule.
2553          * Some things that need to go out of order (prob, action etc.)
2554          * go into actbuf[].
2555          */
2556         static uint32_t rulebuf[IPFW_RULE_SIZE_MAX];
2557         static uint32_t actbuf[IPFW_RULE_SIZE_MAX];
2558         static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX];
2559
2560         ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2561         ipfw_insn *first_cmd;   /* first match pattern */
2562
2563         struct ipfw_ioc_rule *rule;
2564
2565         /*
2566          * various flags used to record that we entered some fields.
2567          */
2568         ipfw_insn *have_state = NULL;   /* check-state or keep-state */
2569
2570         int i;
2571
2572         int open_par = 0;       /* open parenthesis ( */
2573
2574         /* proto is here because it is used to fetch ports */
2575         u_char proto = IPPROTO_IP;      /* default protocol */
2576
2577         double match_prob = 1; /* match probability, default is always match */
2578
2579         bzero(actbuf, sizeof(actbuf));          /* actions go here */
2580         bzero(cmdbuf, sizeof(cmdbuf));
2581         bzero(rulebuf, sizeof(rulebuf));
2582
2583         rule = (struct ipfw_ioc_rule *)rulebuf;
2584         cmd = (ipfw_insn *)cmdbuf;
2585         action = (ipfw_insn *)actbuf;
2586
2587         av++; ac--;
2588
2589         /* [rule N]     -- Rule number optional */
2590         if (ac && isdigit(**av)) {
2591                 rule->rulenum = atoi(*av);
2592                 av++;
2593                 ac--;
2594         }
2595
2596         /* [set N]      -- set number (0..30), optional */
2597         if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2598                 int set = strtoul(av[1], NULL, 10);
2599                 if (set < 0 || set > 30)
2600                         errx(EX_DATAERR, "illegal set %s", av[1]);
2601                 rule->set = set;
2602                 av += 2; ac -= 2;
2603         }
2604
2605         /* [prob D]     -- match probability, optional */
2606         if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2607                 match_prob = strtod(av[1], NULL);
2608
2609                 if (match_prob <= 0 || match_prob > 1)
2610                         errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2611                 av += 2; ac -= 2;
2612         }
2613
2614         /* action       -- mandatory */
2615         NEED1("missing action");
2616         i = match_token(rule_actions, *av);
2617         ac--; av++;
2618         action->len = 1;        /* default */
2619         switch(i) {
2620         case TOK_CHECKSTATE:
2621                 have_state = action;
2622                 action->opcode = O_CHECK_STATE;
2623                 break;
2624
2625         case TOK_ACCEPT:
2626                 action->opcode = O_ACCEPT;
2627                 break;
2628
2629         case TOK_DEFRAG:
2630                 action->opcode = O_DEFRAG;
2631                 action->arg1 = 0;
2632                 break;
2633
2634         case TOK_DENY:
2635                 action->opcode = O_DENY;
2636                 action->arg1 = 0;
2637                 break;
2638
2639         case TOK_REJECT:
2640                 action->opcode = O_REJECT;
2641                 action->arg1 = ICMP_UNREACH_HOST;
2642                 break;
2643
2644         case TOK_RESET:
2645                 action->opcode = O_REJECT;
2646                 action->arg1 = ICMP_REJECT_RST;
2647                 break;
2648
2649         case TOK_UNREACH:
2650                 action->opcode = O_REJECT;
2651                 NEED1("missing reject code");
2652                 fill_reject_code(&action->arg1, *av);
2653                 ac--; av++;
2654                 break;
2655
2656         case TOK_COUNT:
2657                 action->opcode = O_COUNT;
2658                 break;
2659
2660         case TOK_QUEUE:
2661         case TOK_PIPE:
2662                 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2663         case TOK_SKIPTO:
2664                 if (i == TOK_QUEUE)
2665                         action->opcode = O_QUEUE;
2666                 else if (i == TOK_PIPE)
2667                         action->opcode = O_PIPE;
2668                 else if (i == TOK_SKIPTO)
2669                         action->opcode = O_SKIPTO;
2670                 NEED1("missing skipto/pipe/queue number");
2671                 action->arg1 = strtoul(*av, NULL, 10);
2672                 av++; ac--;
2673                 break;
2674
2675         case TOK_DIVERT:
2676         case TOK_TEE:
2677                 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2678                 NEED1("missing divert/tee port");
2679                 action->arg1 = strtoul(*av, NULL, 0);
2680                 if (action->arg1 == 0) {
2681                         struct servent *serv;
2682                         setservent(1);
2683                         serv = getservbyname(av[0], "divert");
2684                         if (serv != NULL)
2685                                 action->arg1 = ntohs(serv->s_port);
2686                         else
2687                                 errx(EX_DATAERR, "illegal divert/tee port");
2688                 }
2689                 ac--; av++;
2690                 break;
2691
2692         case TOK_FORWARD: {
2693                 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2694                 char *st, *end;
2695
2696                 NEED1("missing forward address[:port]");
2697
2698                 action->opcode = O_FORWARD_IP;
2699                 action->len = F_INSN_SIZE(ipfw_insn_sa);
2700
2701                 p->sa.sin_len = sizeof(struct sockaddr_in);
2702                 p->sa.sin_family = AF_INET;
2703                 p->sa.sin_port = 0;
2704                 /*
2705                  * locate the address-port separator (':' or ',')
2706                  */
2707                 st = strchr(*av, ':');
2708                 if (st == NULL)
2709                         st = strchr(*av, ',');
2710                 if (st != NULL) {
2711                         *(st++) = '\0';
2712                         i = strtoport(st, &end, 0 /* base */, 0 /* proto */);
2713                         if (st == end)
2714                                 errx(EX_DATAERR,
2715                                     "illegal forwarding port ``%s''", st);
2716                         p->sa.sin_port = (u_short)i;
2717                 }
2718                 lookup_host(*av, &(p->sa.sin_addr));
2719                 }
2720                 ac--; av++;
2721                 break;
2722
2723         default:
2724                 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2725         }
2726         action = next_cmd(action);
2727
2728         /*
2729          * [log [logamount N]]  -- log, optional
2730          *
2731          * If exists, it goes first in the cmdbuf, but then it is
2732          * skipped in the copy section to the end of the buffer.
2733          */
2734         if (ac && !strncmp(*av, "log", strlen(*av))) {
2735                 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2736
2737                 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2738                 cmd->opcode = O_LOG;
2739                 av++; ac--;
2740                 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2741                         ac--; av++;
2742                         NEED1("logamount requires argument");
2743                         c->max_log = atoi(*av);
2744                         ac--; av++;
2745                 }
2746                 cmd = next_cmd(cmd);
2747         }
2748
2749         if (have_state) /* must be a check-state, we are done */
2750                 goto done;
2751
2752 #define OR_START(target)                                        \
2753         if (ac && (*av[0] == '(' || *av[0] == '{')) {           \
2754                 if (open_par)                                   \
2755                         errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2756                 prev = NULL;                                    \
2757                 open_par = 1;                                   \
2758                 if ( (av[0])[1] == '\0') {                      \
2759                         ac--; av++;                             \
2760                 } else                                          \
2761                         (*av)++;                                \
2762         }                                                       \
2763         target:                                                 \
2764
2765
2766 #define CLOSE_PAR                                               \
2767         if (open_par) {                                         \
2768                 if (ac && (                                     \
2769                     !strncmp(*av, ")", strlen(*av)) ||          \
2770                     !strncmp(*av, "}", strlen(*av)) )) {        \
2771                         prev = NULL;                            \
2772                         open_par = 0;                           \
2773                         ac--; av++;                             \
2774                 } else                                          \
2775                         errx(EX_USAGE, "missing \")\"\n");      \
2776         }
2777
2778 #define NOT_BLOCK                                               \
2779         if (ac && !strncmp(*av, "not", strlen(*av))) {          \
2780                 if (cmd->len & F_NOT)                           \
2781                         errx(EX_USAGE, "double \"not\" not allowed\n"); \
2782                 cmd->len |= F_NOT;                              \
2783                 ac--; av++;                                     \
2784         }
2785
2786 #define OR_BLOCK(target)                                        \
2787         if (ac && !strncmp(*av, "or", strlen(*av))) {           \
2788                 if (prev == NULL || open_par == 0)              \
2789                         errx(EX_DATAERR, "invalid OR block");   \
2790                 prev->len |= F_OR;                              \
2791                 ac--; av++;                                     \
2792                 goto target;                                    \
2793         }                                                       \
2794         CLOSE_PAR;
2795
2796         first_cmd = cmd;
2797
2798 #if 0
2799         /*
2800          * MAC addresses, optional.
2801          * If we have this, we skip the part "proto from src to dst"
2802          * and jump straight to the option parsing.
2803          */
2804         NOT_BLOCK;
2805         NEED1("missing protocol");
2806         if (!strncmp(*av, "MAC", strlen(*av)) ||
2807             !strncmp(*av, "mac", strlen(*av))) {
2808                 ac--; av++;     /* the "MAC" keyword */
2809                 add_mac(cmd, ac, av); /* exits in case of errors */
2810                 cmd = next_cmd(cmd);
2811                 ac -= 2; av += 2;       /* dst-mac and src-mac */
2812                 NOT_BLOCK;
2813                 NEED1("missing mac type");
2814                 if (add_mactype(cmd, ac, av[0]))
2815                         cmd = next_cmd(cmd);
2816                 ac--; av++;     /* any or mac-type */
2817                 goto read_options;
2818         }
2819 #endif
2820
2821         /*
2822          * protocol, mandatory
2823          */
2824     OR_START(get_proto);
2825         NOT_BLOCK;
2826         NEED1("missing protocol");
2827         if (add_proto(cmd, *av)) {
2828                 av++; ac--;
2829                 if (F_LEN(cmd) == 0)    /* plain IP */
2830                         proto = 0;
2831                 else {
2832                         proto = cmd->arg1;
2833                         prev = cmd;
2834                         cmd = next_cmd(cmd);
2835                 }
2836         } else if (first_cmd != cmd) {
2837                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2838         } else
2839                 goto read_options;
2840     OR_BLOCK(get_proto);
2841
2842         /*
2843          * "from", mandatory
2844          */
2845         if (!ac || strncmp(*av, "from", strlen(*av)))
2846                 errx(EX_USAGE, "missing ``from''");
2847         ac--; av++;
2848
2849         /*
2850          * source IP, mandatory
2851          */
2852     OR_START(source_ip);
2853         NOT_BLOCK;      /* optional "not" */
2854         NEED1("missing source address");
2855         if (add_srcip(cmd, *av)) {
2856                 ac--; av++;
2857                 if (F_LEN(cmd) != 0) {  /* ! any */
2858                         prev = cmd;
2859                         cmd = next_cmd(cmd);
2860                 }
2861         }
2862     OR_BLOCK(source_ip);
2863
2864         /*
2865          * source ports, optional
2866          */
2867         NOT_BLOCK;      /* optional "not" */
2868         if (ac) {
2869                 if (!strncmp(*av, "any", strlen(*av)) ||
2870                     add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2871                         ac--; av++;
2872                         if (F_LEN(cmd) != 0)
2873                                 cmd = next_cmd(cmd);
2874                 }
2875         }
2876
2877         /*
2878          * "to", mandatory
2879          */
2880         if (!ac || strncmp(*av, "to", strlen(*av)))
2881                 errx(EX_USAGE, "missing ``to''");
2882         av++; ac--;
2883
2884         /*
2885          * destination, mandatory
2886          */
2887     OR_START(dest_ip);
2888         NOT_BLOCK;      /* optional "not" */
2889         NEED1("missing dst address");
2890         if (add_dstip(cmd, *av)) {
2891                 ac--; av++;
2892                 if (F_LEN(cmd) != 0) {  /* ! any */
2893                         prev = cmd;
2894                         cmd = next_cmd(cmd);
2895                 }
2896         }
2897     OR_BLOCK(dest_ip);
2898
2899         /*
2900          * dest. ports, optional
2901          */
2902         NOT_BLOCK;      /* optional "not" */
2903         if (ac) {
2904                 if (!strncmp(*av, "any", strlen(*av)) ||
2905                     add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
2906                         ac--; av++;
2907                         if (F_LEN(cmd) != 0)
2908                                 cmd = next_cmd(cmd);
2909                 }
2910         }
2911
2912 read_options:
2913         if (ac && first_cmd == cmd) {
2914                 /*
2915                  * nothing specified so far, store in the rule to ease
2916                  * printout later.
2917                  */
2918                  rule->usr_flags = IPFW_USR_F_NORULE;
2919         }
2920         prev = NULL;
2921         while (ac) {
2922                 char *s1;
2923                 ipfw_insn_u32 *cmd32;   /* alias for cmd */
2924
2925                 s1 = *av;
2926                 cmd32 = (ipfw_insn_u32 *)cmd;
2927
2928                 if (*s1 == '!') {       /* alternate syntax for NOT */
2929                         if (cmd->len & F_NOT)
2930                                 errx(EX_USAGE, "double \"not\" not allowed\n");
2931                         cmd->len = F_NOT;
2932                         s1++;
2933                 }
2934                 i = match_token(rule_options, s1);
2935                 ac--; av++;
2936                 switch(i) {
2937                 case TOK_NOT:
2938                         if (cmd->len & F_NOT)
2939                                 errx(EX_USAGE, "double \"not\" not allowed\n");
2940                         cmd->len = F_NOT;
2941                         break;
2942
2943                 case TOK_OR:
2944                         if (open_par == 0 || prev == NULL)
2945                                 errx(EX_USAGE, "invalid \"or\" block\n");
2946                         prev->len |= F_OR;
2947                         break;
2948
2949                 case TOK_STARTBRACE:
2950                         if (open_par)
2951                                 errx(EX_USAGE, "+nested \"(\" not allowed\n");
2952                         open_par = 1;
2953                         break;
2954
2955                 case TOK_ENDBRACE:
2956                         if (!open_par)
2957                                 errx(EX_USAGE, "+missing \")\"\n");
2958                         open_par = 0;
2959                         prev = NULL;
2960                         break;
2961
2962                 case TOK_IN:
2963                         fill_cmd(cmd, O_IN, 0, 0);
2964                         break;
2965
2966                 case TOK_OUT:
2967                         cmd->len ^= F_NOT; /* toggle F_NOT */
2968                         fill_cmd(cmd, O_IN, 0, 0);
2969                         break;
2970
2971                 case TOK_FRAG:
2972                         fill_cmd(cmd, O_FRAG, 0, 0);
2973                         break;
2974
2975                 case TOK_IPFRAG:
2976                         fill_cmd(cmd, O_IPFRAG, 0, 0);
2977                         break;
2978
2979                 case TOK_LAYER2:
2980                         fill_cmd(cmd, O_LAYER2, 0, 0);
2981                         break;
2982
2983                 case TOK_XMIT:
2984                 case TOK_RECV:
2985                 case TOK_VIA:
2986                         NEED1("recv, xmit, via require interface name"
2987                                 " or address");
2988                         fill_iface((ipfw_insn_if *)cmd, av[0]);
2989                         ac--; av++;
2990                         if (F_LEN(cmd) == 0)    /* not a valid address */
2991                                 break;
2992                         if (i == TOK_XMIT)
2993                                 cmd->opcode = O_XMIT;
2994                         else if (i == TOK_RECV)
2995                                 cmd->opcode = O_RECV;
2996                         else if (i == TOK_VIA)
2997                                 cmd->opcode = O_VIA;
2998                         break;
2999
3000                 case TOK_ICMPTYPES:
3001                         NEED1("icmptypes requires list of types");
3002                         fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3003                         av++; ac--;
3004                         break;
3005
3006                 case TOK_IPTTL:
3007                         NEED1("ipttl requires TTL");
3008                         fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3009                         ac--; av++;
3010                         break;
3011
3012                 case TOK_IPID:
3013                         NEED1("ipid requires length");
3014                         fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3015                         ac--; av++;
3016                         break;
3017
3018                 case TOK_IPLEN:
3019                         NEED1("iplen requires length");
3020                         fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3021                         ac--; av++;
3022                         break;
3023
3024                 case TOK_IPVER:
3025                         NEED1("ipver requires version");
3026                         fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3027                         ac--; av++;
3028                         break;
3029
3030                 case TOK_IPPRECEDENCE:
3031                         NEED1("ipprecedence requires value");
3032                         fill_cmd(cmd, O_IPPRECEDENCE, 0,
3033                             (strtoul(*av, NULL, 0) & 7) << 5);
3034                         ac--; av++;
3035                         break;
3036
3037                 case TOK_IPOPTS:
3038                         NEED1("missing argument for ipoptions");
3039                         fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3040                         ac--; av++;
3041                         break;
3042
3043                 case TOK_IPTOS:
3044                         NEED1("missing argument for iptos");
3045                         fill_flags(cmd, O_IPTOS, f_iptos, *av);
3046                         ac--; av++;
3047                         break;
3048
3049                 case TOK_UID:
3050                         NEED1("uid requires argument");
3051                     {
3052                         char *end;
3053                         uid_t uid;
3054                         struct passwd *pwd;
3055
3056                         cmd->opcode = O_UID;
3057                         uid = strtoul(*av, &end, 0);
3058                         pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3059                         if (pwd == NULL)
3060                                 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3061                         cmd32->d[0] = pwd->pw_uid;
3062                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3063                         ac--; av++;
3064                     }
3065                         break;
3066
3067                 case TOK_GID:
3068                         NEED1("gid requires argument");
3069                     {
3070                         char *end;
3071                         gid_t gid;
3072                         struct group *grp;
3073
3074                         cmd->opcode = O_GID;
3075                         gid = strtoul(*av, &end, 0);
3076                         grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3077                         if (grp == NULL)
3078                                 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3079                         cmd32->d[0] = grp->gr_gid;
3080                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3081                         ac--; av++;
3082                     }
3083                         break;
3084
3085                 case TOK_ESTAB:
3086                         fill_cmd(cmd, O_ESTAB, 0, 0);
3087                         break;
3088
3089                 case TOK_SETUP:
3090                         fill_cmd(cmd, O_TCPFLAGS, 0,
3091                                 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3092                         break;
3093
3094                 case TOK_TCPOPTS:
3095                         NEED1("missing argument for tcpoptions");
3096                         fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3097                         ac--; av++;
3098                         break;
3099
3100                 case TOK_TCPSEQ:
3101                 case TOK_TCPACK:
3102                         NEED1("tcpseq/tcpack requires argument");
3103                         cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3104                         cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3105                         cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3106                         ac--; av++;
3107                         break;
3108
3109                 case TOK_TCPWIN:
3110                         NEED1("tcpwin requires length");
3111                         fill_cmd(cmd, O_TCPWIN, 0,
3112                             htons(strtoul(*av, NULL, 0)));
3113                         ac--; av++;
3114                         break;
3115
3116                 case TOK_TCPFLAGS:
3117                         NEED1("missing argument for tcpflags");
3118                         cmd->opcode = O_TCPFLAGS;
3119                         fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3120                         ac--; av++;
3121                         break;
3122
3123                 case TOK_KEEPSTATE:
3124                         if (open_par)
3125                                 errx(EX_USAGE, "keep-state cannot be part "
3126                                     "of an or block");
3127                         if (have_state)
3128                                 errx(EX_USAGE, "only one of keep-state "
3129                                         "and limit is allowed");
3130                         have_state = cmd;
3131                         fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3132                         break;
3133
3134                 case TOK_LIMIT:
3135                         if (open_par)
3136                                 errx(EX_USAGE, "limit cannot be part "
3137                                     "of an or block");
3138                         if (have_state)
3139                                 errx(EX_USAGE, "only one of keep-state "
3140                                         "and limit is allowed");
3141                         NEED1("limit needs mask and # of connections");
3142                         have_state = cmd;
3143                     {
3144                         ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3145
3146                         cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3147                         cmd->opcode = O_LIMIT;
3148                         c->limit_mask = 0;
3149                         c->conn_limit = 0;
3150                         for (; ac >1 ;) {
3151                                 int val;
3152
3153                                 val = match_token(limit_masks, *av);
3154                                 if (val <= 0)
3155                                         break;
3156                                 c->limit_mask |= val;
3157                                 ac--; av++;
3158                         }
3159                         c->conn_limit = atoi(*av);
3160                         if (c->conn_limit == 0)
3161                                 errx(EX_USAGE, "limit: limit must be >0");
3162                         if (c->limit_mask == 0)
3163                                 errx(EX_USAGE, "missing limit mask");
3164                         ac--; av++;
3165                     }
3166                         break;
3167
3168                 case TOK_PROTO:
3169                         NEED1("missing protocol");
3170                         if (add_proto(cmd, *av)) {
3171                                 proto = cmd->arg1;
3172                                 ac--; av++;
3173                         } else
3174                                 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3175                         break;
3176
3177                 case TOK_SRCIP:
3178                         NEED1("missing source IP");
3179                         if (add_srcip(cmd, *av)) {
3180                                 ac--; av++;
3181                         }
3182                         break;
3183
3184                 case TOK_DSTIP:
3185                         NEED1("missing destination IP");
3186                         if (add_dstip(cmd, *av)) {
3187                                 ac--; av++;
3188                         }
3189                         break;
3190
3191                 case TOK_SRCPORT:
3192                         NEED1("missing source port");
3193                         if (!strncmp(*av, "any", strlen(*av)) ||
3194                             add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3195                                 ac--; av++;
3196                         } else
3197                                 errx(EX_DATAERR, "invalid source port %s", *av);
3198                         break;
3199
3200                 case TOK_DSTPORT:
3201                         NEED1("missing destination port");
3202                         if (!strncmp(*av, "any", strlen(*av)) ||
3203                             add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3204                                 ac--; av++;
3205                         } else
3206                                 errx(EX_DATAERR, "invalid destination port %s",
3207                                     *av);
3208                         break;
3209
3210                 case TOK_MAC:
3211                         if (ac < 2)
3212                                 errx(EX_USAGE, "MAC dst-mac src-mac");
3213                         if (add_mac(cmd, ac, av)) {
3214                                 ac -= 2; av += 2;
3215                         }
3216                         break;
3217
3218                 case TOK_MACTYPE:
3219                         NEED1("missing mac type");
3220                         if (!add_mactype(cmd, ac, *av))
3221                                 errx(EX_DATAERR, "invalid mac type %s", *av);
3222                         ac--; av++;
3223                         break;
3224
3225                 default:
3226                         errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s1);
3227                 }
3228                 if (F_LEN(cmd) > 0) {   /* prepare to advance */
3229                         prev = cmd;
3230                         cmd = next_cmd(cmd);
3231                 }
3232         }
3233
3234 done:
3235         /*
3236          * Now copy stuff into the rule.
3237          * If we have a keep-state option, the first instruction
3238          * must be a PROBE_STATE (which is generated here).
3239          * If we have a LOG option, it was stored as the first command,
3240          * and now must be moved to the top of the action part.
3241          */
3242         dst = (ipfw_insn *)rule->cmd;
3243
3244         /*
3245          * First thing to write into the command stream is the match probability.
3246          */
3247         if (match_prob != 1) { /* 1 means always match */
3248                 dst->opcode = O_PROB;
3249                 dst->len = 2;
3250                 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3251                 dst += dst->len;
3252         }
3253
3254         /*
3255          * generate O_PROBE_STATE if necessary
3256          */
3257         if (have_state && have_state->opcode != O_CHECK_STATE) {
3258                 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3259                 dst = next_cmd(dst);
3260         }
3261         /*
3262          * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT
3263          */
3264         for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3265                 i = F_LEN(src);
3266
3267                 switch (src->opcode) {
3268                 case O_LOG:
3269                 case O_KEEP_STATE:
3270                 case O_LIMIT:
3271                         break;
3272                 default:
3273                         bcopy(src, dst, i * sizeof(u_int32_t));
3274                         dst += i;
3275                 }
3276         }
3277
3278         /*
3279          * put back the have_state command as last opcode
3280          */
3281         if (have_state && have_state->opcode != O_CHECK_STATE) {
3282                 i = F_LEN(have_state);
3283                 bcopy(have_state, dst, i * sizeof(u_int32_t));
3284                 dst += i;
3285         }
3286         /*
3287          * start action section
3288          */
3289         rule->act_ofs = dst - rule->cmd;
3290
3291         /*
3292          * put back O_LOG if necessary
3293          */
3294         src = (ipfw_insn *)cmdbuf;
3295         if ( src->opcode == O_LOG ) {
3296                 i = F_LEN(src);
3297                 bcopy(src, dst, i * sizeof(u_int32_t));
3298                 dst += i;
3299         }
3300         /*
3301          * copy all other actions
3302          */
3303         for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3304                 i = F_LEN(src);
3305                 bcopy(src, dst, i * sizeof(u_int32_t));
3306                 dst += i;
3307         }
3308
3309         rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3310         i = (uint8_t *)dst - (uint8_t *)rule;
3311         if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3312                 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3313         if (!do_quiet)
3314                 show_ipfw(rule, 10, 10);
3315 }
3316
3317 static void
3318 zero(int ac, char *av[])
3319 {
3320         int rulenum;
3321         int failed = EX_OK;
3322
3323         av++; ac--;
3324
3325         if (!ac) {
3326                 /* clear all entries */
3327                 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3328                         err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3329                 if (!do_quiet)
3330                         printf("Accounting cleared.\n");
3331
3332                 return;
3333         }
3334
3335         while (ac) {
3336                 /* Rule number */
3337                 if (isdigit(**av)) {
3338                         rulenum = atoi(*av);
3339                         av++;
3340                         ac--;
3341                         if (setsockopt(s, IPPROTO_IP,
3342                             IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3343                                 warn("rule %u: setsockopt(IP_FW_ZERO)",
3344                                     rulenum);
3345                                 failed = EX_UNAVAILABLE;
3346                         } else if (!do_quiet)
3347                                 printf("Entry %d cleared\n", rulenum);
3348                 } else {
3349                         errx(EX_USAGE, "invalid rule number ``%s''", *av);
3350                 }
3351         }
3352         if (failed != EX_OK)
3353                 exit(failed);
3354 }
3355
3356 static void
3357 resetlog(int ac, char *av[])
3358 {
3359         int rulenum;
3360         int failed = EX_OK;
3361
3362         av++; ac--;
3363
3364         if (!ac) {
3365                 /* clear all entries */
3366                 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3367                         err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3368                 if (!do_quiet)
3369                         printf("Logging counts reset.\n");
3370
3371                 return;
3372         }
3373
3374         while (ac) {
3375                 /* Rule number */
3376                 if (isdigit(**av)) {
3377                         rulenum = atoi(*av);
3378                         av++;
3379                         ac--;
3380                         if (setsockopt(s, IPPROTO_IP,
3381                             IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3382                                 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3383                                     rulenum);
3384                                 failed = EX_UNAVAILABLE;
3385                         } else if (!do_quiet)
3386                                 printf("Entry %d logging count reset\n",
3387                                     rulenum);
3388                 } else {
3389                         errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3390                 }
3391         }
3392         if (failed != EX_OK)
3393                 exit(failed);
3394 }
3395
3396 static void
3397 flush(void)
3398 {
3399         int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3400
3401         if (!do_force && !do_quiet) { /* need to ask user */
3402                 int c;
3403
3404                 printf("Are you sure? [yn] ");
3405                 fflush(stdout);
3406                 do {
3407                         c = toupper(getc(stdin));
3408                         while (c != '\n' && getc(stdin) != '\n')
3409                                 if (feof(stdin))
3410                                         return; /* and do not flush */
3411                 } while (c != 'Y' && c != 'N');
3412                 printf("\n");
3413                 if (c == 'N')   /* user said no */
3414                         return;
3415         }
3416         if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3417                 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3418                     do_pipe ? "DUMMYNET" : "FW");
3419         if (!do_quiet)
3420                 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3421 }
3422
3423 static void
3424 table_create(int ac, char **av)
3425 {
3426         struct ipfw_ioc_table tbl;
3427         char *eptr;
3428
3429         ac--;
3430         av++;
3431
3432         if (ac == 0)
3433                 errx(EX_DATAERR, "missing table id");
3434
3435         memset(&tbl, 0, sizeof(tbl));
3436         tbl.tableid = strtoul(*av, &eptr, 0);
3437         if (*eptr != '\0')
3438                 errx(EX_DATAERR, "invalid table id %s", *av);
3439         if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_CREATE, &tbl, sizeof(tbl)) < 0)
3440                 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_CREATE)");
3441         if (!do_quiet)
3442                 printf("Created table %d\n", tbl.tableid);
3443 }
3444
3445 static void
3446 table_flush(int ac, char **av, int opt)
3447 {
3448         struct ipfw_ioc_table tbl;
3449         char *eptr;
3450
3451         ac--;
3452         av++;
3453
3454         memset(&tbl, 0, sizeof(tbl));
3455
3456         if (ac == 0) {
3457                 if (opt == IP_FW_TBL_FLUSH) {
3458                         /* Flush all tables */
3459                         tbl.tableid = -1;
3460                         goto flush;
3461                 }
3462                 errx(EX_DATAERR, "missing table id");
3463         }
3464
3465         tbl.tableid = strtoul(*av, &eptr, 0);
3466         if (*eptr != '\0')
3467                 errx(EX_DATAERR, "invalid table id %s", *av);
3468
3469 flush:
3470         if (!do_force && !do_quiet) { /* need to ask user */
3471                 int c;
3472
3473                 printf("Are you sure? [yn] ");
3474                 fflush(stdout);
3475                 do {
3476                         c = toupper(getc(stdin));
3477                         while (c != '\n' && getc(stdin) != '\n')
3478                                 if (feof(stdin))
3479                                         return; /* and do not flush */
3480                 } while (c != 'Y' && c != 'N');
3481                 printf("\n");
3482                 if (c == 'N')   /* user said no */
3483                         return;
3484         }
3485
3486         if (setsockopt(s, IPPROTO_IP, opt, &tbl, sizeof(tbl)) < 0) {
3487                 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)",
3488                     opt == IP_FW_TBL_FLUSH ? "FLUSH" : "DESTROY");
3489         }
3490         if (!do_quiet) {
3491                 if (tbl.tableid >= 0) {
3492                         printf("%sed table %d\n",
3493                             opt == IP_FW_TBL_FLUSH ? "Flush" : "Destroy",
3494                             tbl.tableid);
3495                 } else {
3496                         printf("Flushed all tables\n");
3497                 }
3498         }
3499 }
3500
3501 static void
3502 table_list(void)
3503 {
3504         struct ipfw_ioc_tbllist *list;
3505         int table_max, i;
3506         size_t len;
3507         socklen_t len1;
3508
3509         len = sizeof(table_max);
3510         if (sysctlbyname("net.inet.ip.fw.table_max", &table_max, &len,
3511             NULL, 0) < 0)
3512                 err(EX_UNAVAILABLE, "sysctl net.inet.ip.fw.table_max failed");
3513
3514         len1 = __offsetof(struct ipfw_ioc_tbllist, tables[table_max]);
3515         list = malloc(len1);
3516         list->tableid = -1;
3517
3518         if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, list, &len1) < 0)
3519                 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)");
3520
3521         for (i = 0; i < list->tablecnt; ++i)
3522                 printf("%u\n", list->tables[i]);
3523 }
3524
3525 /* XXX copied from route(8) */
3526 static void
3527 inet_makenetandmask(in_addr_t net, struct sockaddr_in *in,
3528     struct sockaddr_in *in_mask, int bits)
3529 {
3530         in_addr_t addr, mask = 0;
3531         char *cp;
3532
3533         /*
3534          * XXX: This approach unable to handle 0.0.0.1/32 correctly
3535          * as inet_network() converts 0.0.0.1 and 1 equally.
3536          */
3537         if (net <= 0xff)
3538                 addr = net << IN_CLASSA_NSHIFT;
3539         else if (net <= 0xffff)
3540                 addr = net << IN_CLASSB_NSHIFT;
3541         else if (net <= 0xffffff)
3542                 addr = net << IN_CLASSC_NSHIFT;
3543         else
3544                 addr = net;
3545
3546         if (bits != 0)
3547                 mask = 0xffffffff << (32 - bits);
3548         else if (net == 0)
3549                 mask = 0;
3550         else if (IN_CLASSA(addr))
3551                 mask = IN_CLASSA_NET;
3552         else if (IN_CLASSB(addr))
3553                 mask = IN_CLASSB_NET;
3554         else if (IN_CLASSC(addr))
3555                 mask = IN_CLASSC_NET;
3556         else if (IN_MULTICAST(addr))
3557                 mask = IN_CLASSD_NET;
3558         else
3559                 mask = 0xffffffff;
3560
3561         in->sin_family = AF_INET;
3562         in->sin_len = sizeof(struct sockaddr_in);
3563         in->sin_addr.s_addr = htonl(addr);
3564
3565         if (mask != 0xffffffff) {
3566                 in_mask->sin_addr.s_addr = htonl(mask);
3567                 cp = (char *)(&in_mask->sin_addr + 1);
3568                 while (*--cp == 0 && cp > (char *)in_mask)
3569                         ;
3570                 in_mask->sin_len = 1 + cp - (char *)in_mask;
3571         }
3572 }
3573
3574 static void
3575 table_alt(int ac, char **av, int opt)
3576 {
3577         struct ipfw_ioc_tblcont ent;
3578         struct ipfw_ioc_tblent *te;
3579         char *eptr;
3580
3581         --ac;
3582         ++av;
3583         if (ac == 0)
3584                 errx(EX_DATAERR, "missing table id");
3585
3586         memset(&ent, 0, sizeof(ent));
3587         ent.tableid = strtoul(*av, &eptr, 0);
3588         ent.entcnt = 1;
3589         te = &ent.ent[0];
3590         if (*eptr != '\0')
3591                 errx(EX_DATAERR, "invalid table id %s", *av);
3592
3593         --ac;
3594         ++av;
3595         if (ac == 0)
3596                 errx(EX_DATAERR, "missing addresses");
3597
3598         while (ac > 0) {
3599                 char *q;
3600
3601                 q = strchr(*av, '/');
3602                 if (q != NULL) {
3603                         in_addr_t val;
3604                         int bits;
3605
3606                         *q = '\0';
3607                         val = inet_network(*av);
3608                         *q = '/';
3609                         if (val == INADDR_NONE) {
3610                                 fflush(stdout);
3611                                 errx(EX_DATAERR, "invalid address %s", *av);
3612                         }
3613
3614                         bits = strtoul(q + 1, &eptr, 0);
3615                         if (*eptr != '\0') {
3616                                 fflush(stdout);
3617                                 errx(EX_DATAERR, "invalid address %s", *av);
3618                         }
3619                         inet_makenetandmask(val, &te->key, &te->netmask, bits);
3620                 } else {
3621                         int n;
3622
3623                         n = inet_pton(AF_INET, *av, &te->key.sin_addr);
3624                         if (n == 0) {
3625                                 fflush(stdout);
3626                                 errx(EX_DATAERR, "invalid address %s", *av);
3627                         } else if (n < 0) {
3628                                 fflush(stdout);
3629                                 err(EX_UNAVAILABLE, "inet_pton failed");
3630                         }
3631                         te->key.sin_family = AF_INET;
3632                         te->key.sin_len = sizeof(struct sockaddr_in);
3633                 }
3634
3635                 if (setsockopt(s, IPPROTO_IP, opt, &ent, sizeof(ent)) < 0) {
3636                         if (opt == IP_FW_TBL_ADD && errno == EEXIST) {
3637                                 printf("Failed to add %s to table %d\n",
3638                                      *av, ent.tableid);
3639                         } else if (opt == IP_FW_TBL_DEL && errno == ESRCH) {
3640                                 printf("Failed to delete %s from table %d\n",
3641                                      *av, ent.tableid);
3642                         } else {
3643                                 fflush(stdout);
3644                                 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)",
3645                                     opt == IP_FW_TBL_ADD ? "ADD" : "DEL");
3646                         }
3647                 } else if (!do_quiet) {
3648                         printf("%sed %s %s table %d\n",
3649                             opt == IP_FW_TBL_ADD ? "Add" : "Delet", *av,
3650                             opt == IP_FW_TBL_ADD ? "to" : "from", ent.tableid);
3651                 }
3652
3653                 --ac;
3654                 ++av;
3655         }
3656 }
3657
3658 static void
3659 table_show(int ac, char **av)
3660 {
3661         struct ipfw_ioc_tblcont *cont = NULL;
3662         int tableid, count = 128, i, uwidth = 0, lwidth = 0;
3663         char *eptr;
3664
3665         --ac;
3666         ++av;
3667         if (ac == 0)
3668                 errx(EX_DATAERR, "missing table id");
3669
3670         tableid = strtoul(*av, &eptr, 0);
3671         if (*eptr != '\0')
3672                 errx(EX_DATAERR, "invalid table id %s", *av);
3673
3674         for (;;) {
3675                 socklen_t len;
3676
3677                 len = __offsetof(struct ipfw_ioc_tblcont, ent[count]);
3678                 cont = reallocf(cont, len);
3679                 cont->tableid = tableid;
3680
3681                 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, cont, &len) < 0) {
3682                         if (errno == E2BIG) {
3683                                 count *= 2;
3684                                 continue;
3685                         }
3686                         err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)");
3687                 }
3688                 break;
3689         }
3690         if (cont->entcnt == 0)
3691                 return;
3692
3693         if (do_acct) {
3694                 for (i = 0; i < cont->entcnt; ++i) {
3695                         int width;
3696
3697                         width = snprintf(NULL, 0, "%ju",
3698                             (uintmax_t)cont->ent[i].use);
3699                         if (width > uwidth)
3700                                 uwidth = width;
3701                 }
3702         }
3703
3704         for (i = 0; i < cont->entcnt; ++i) {
3705                 const struct ipfw_ioc_tblent *te = &cont->ent[i];
3706                 char addr[INET_ADDRSTRLEN];
3707
3708                 if (do_acct)
3709                         printf("%*ju ", uwidth, (uintmax_t)te->use);
3710                 if (do_time) {
3711                         char timestr[30];
3712
3713                         if (lwidth == 0) {
3714                                 time_t t0 = 0;
3715
3716                                 strcpy(timestr, ctime(&t0));
3717                                 *strchr(timestr, '\n') = '\0';
3718                                 lwidth = strlen(timestr);
3719                         }
3720                         if (te->last_used) {
3721                                 time_t t = _long_to_time(te->last_used);
3722
3723                                 strcpy(timestr, ctime(&t));
3724                                 *strchr(timestr, '\n') = '\0';
3725                                 printf("%s ", timestr);
3726                         } else {
3727                                 printf("%*s ", lwidth, " ");
3728                         }
3729                 }
3730
3731                 if (te->netmask.sin_len == 0) {
3732                         printf("%s\n", inet_ntop(AF_INET,
3733                             &te->key.sin_addr, addr, sizeof(addr)));
3734                 } else {
3735                         struct sockaddr_in mask;
3736                         int b;
3737
3738                         memset(&mask, 0, sizeof(mask));
3739                         memcpy(&mask, &te->netmask,
3740                             te->netmask.sin_len);
3741                         b = ffs(ntohl(te->netmask.sin_addr.s_addr));
3742                         b = 32 - (b - 1);
3743
3744                         printf("%s/%d\n", inet_ntop(AF_INET,
3745                             &te->key.sin_addr, addr, sizeof(addr)), b);
3746                 }
3747         }
3748 }
3749
3750 static void
3751 table_zero(int ac, char **av)
3752 {
3753         struct ipfw_ioc_table tbl;
3754
3755         --ac;
3756         ++av;
3757
3758         memset(&tbl, 0, sizeof(tbl));
3759         if (ac == 0) {
3760                 tbl.tableid = -1;
3761         } else {
3762                 char *eptr;
3763
3764                 tbl.tableid = strtoul(*av, &eptr, 0);
3765                 if (*eptr != '\0')
3766                         errx(EX_DATAERR, "invalid table id %s", *av);
3767         }
3768
3769         if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_ZERO, &tbl, sizeof(tbl)) < 0)
3770                 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_ZERO)");
3771         if (!do_quiet)
3772                 printf("Accounting cleared\n");
3773 }
3774
3775 static void
3776 table_expire(int ac, char **av)
3777 {
3778         struct ipfw_ioc_tblexp tbl;
3779         char *eptr;
3780         socklen_t len;
3781
3782         --ac;
3783         ++av;
3784
3785         memset(&tbl, 0, sizeof(tbl));
3786         if (ac == 0) {
3787                 errx(EX_DATAERR, "missing expire time");
3788         } else if (ac == 1) {
3789                 tbl.tableid = -1;
3790         } else {
3791                 tbl.tableid = strtoul(*av, &eptr, 0);
3792                 if (*eptr != '\0')
3793                         errx(EX_DATAERR, "invalid table id %s", *av);
3794                 --ac;
3795                 ++av;
3796         }
3797
3798         tbl.expire = strtoul(*av, &eptr, 0);
3799         if (*eptr != '\0')
3800                 errx(EX_DATAERR, "invalid expire timeout %s", *av);
3801
3802         if (!do_force && !do_quiet) { /* need to ask user */
3803                 int c;
3804
3805                 printf("Are you sure? [yn] ");
3806                 fflush(stdout);
3807                 do {
3808                         c = toupper(getc(stdin));
3809                         while (c != '\n' && getc(stdin) != '\n')
3810                                 if (feof(stdin))
3811                                         return; /* and do not flush */
3812                 } while (c != 'Y' && c != 'N');
3813                 printf("\n");
3814                 if (c == 'N')   /* user said no */
3815                         return;
3816         }
3817
3818         len = sizeof(tbl);
3819         if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_EXPIRE, &tbl, &len) < 0)
3820                 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_EXPIRE)");
3821         if (!do_quiet) {
3822                 printf("Expired %d address%s\n", tbl.expcnt,
3823                     (tbl.expcnt == 0 || tbl.expcnt > 1) ? "es" : "");
3824         }
3825 }
3826
3827 static int
3828 ipfw_main(int ac, char **av)
3829 {
3830         int ch;
3831