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
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
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.
16 * This software is provided ``AS IS'' without any warranties of any kind.
18 * NEW command line interface for IP firewall facility
20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $
21 * $DragonFly: src/sbin/ipfw/ipfw2.c,v 1.6 2004/12/18 21:43:38 swildner Exp $
24 #include <sys/param.h>
26 #include <sys/socket.h>
27 #include <sys/sockio.h>
28 #include <sys/sysctl.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/dummynet/ip_dummynet.h>
55 #include <netinet/tcp.h>
56 #include <arpa/inet.h>
58 int s, /* main RAW socket */
59 do_resolv, /* Would try to resolve all */
60 do_acct, /* Show packet/byte count */
61 do_time, /* Show time stamps */
62 do_quiet, /* Be quiet in add and flush */
63 do_force, /* Don't ask for confirmation */
64 do_pipe, /* this cmd refers to a pipe */
65 do_sort, /* field to sort results (0 = no) */
66 do_dynamic, /* display dynamic rules */
67 do_expired, /* display expired dynamic rules */
68 do_compact, /* show rules in compact mode */
69 show_sets, /* display rule sets */
72 #define IP_MASK_ALL 0xffffffff
75 * structure to hold flag names and associated values to be
76 * set in the appropriate masks.
77 * A NULL string terminates the array.
78 * Often, an element with 0 value contains an error string.
86 static struct _s_x f_tcpflags[] = {
97 static struct _s_x f_tcpopts[] = {
98 { "mss", IP_FW_TCPOPT_MSS },
99 { "maxseg", IP_FW_TCPOPT_MSS },
100 { "window", IP_FW_TCPOPT_WINDOW },
101 { "sack", IP_FW_TCPOPT_SACK },
102 { "ts", IP_FW_TCPOPT_TS },
103 { "timestamp", IP_FW_TCPOPT_TS },
104 { "cc", IP_FW_TCPOPT_CC },
110 * IP options span the range 0 to 255 so we need to remap them
111 * (though in fact only the low 5 bits are significant).
113 static struct _s_x f_ipopts[] = {
114 { "ssrr", IP_FW_IPOPT_SSRR},
115 { "lsrr", IP_FW_IPOPT_LSRR},
116 { "rr", IP_FW_IPOPT_RR},
117 { "ts", IP_FW_IPOPT_TS},
122 static struct _s_x f_iptos[] = {
123 { "lowdelay", IPTOS_LOWDELAY},
124 { "throughput", IPTOS_THROUGHPUT},
125 { "reliability", IPTOS_RELIABILITY},
126 { "mincost", IPTOS_MINCOST},
127 { "congestion", IPTOS_CE},
128 { "ecntransport", IPTOS_ECT},
129 { "ip tos option", 0},
133 static struct _s_x limit_masks[] = {
134 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
135 {"src-addr", DYN_SRC_ADDR},
136 {"src-port", DYN_SRC_PORT},
137 {"dst-addr", DYN_DST_ADDR},
138 {"dst-port", DYN_DST_PORT},
143 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
144 * This is only used in this code.
146 #define IPPROTO_ETHERTYPE 0x1000
147 static struct _s_x ether_types[] = {
149 * Note, we cannot use "-:&/" in the names because they are field
150 * separators in the type specifications. Also, we use s = NULL as
151 * end-delimiter, because a type of 0 can be legal.
164 { "pppoe_disc", 0x8863 },
165 { "pppoe_sess", 0x8864 },
166 { "ipx_8022", 0x00E0 },
167 { "ipx_8023", 0x0000 },
168 { "ipx_ii", 0x8137 },
169 { "ipx_snap", 0x8137 },
175 static void show_usage(void);
246 struct _s_x dummynet_params[] = {
248 { "noerror", TOK_NOERROR },
249 { "buckets", TOK_BUCKETS },
250 { "dst-ip", TOK_DSTIP },
251 { "src-ip", TOK_SRCIP },
252 { "dst-port", TOK_DSTPORT },
253 { "src-port", TOK_SRCPORT },
254 { "proto", TOK_PROTO },
255 { "weight", TOK_WEIGHT },
257 { "mask", TOK_MASK },
258 { "droptail", TOK_DROPTAIL },
260 { "gred", TOK_GRED },
262 { "bandwidth", TOK_BW },
263 { "delay", TOK_DELAY },
264 { "pipe", TOK_PIPE },
265 { "queue", TOK_QUEUE },
266 { "dummynet-params", TOK_NULL },
270 struct _s_x rule_actions[] = {
271 { "accept", TOK_ACCEPT },
272 { "pass", TOK_ACCEPT },
273 { "allow", TOK_ACCEPT },
274 { "permit", TOK_ACCEPT },
275 { "count", TOK_COUNT },
276 { "pipe", TOK_PIPE },
277 { "queue", TOK_QUEUE },
278 { "divert", TOK_DIVERT },
280 { "fwd", TOK_FORWARD },
281 { "forward", TOK_FORWARD },
282 { "skipto", TOK_SKIPTO },
283 { "deny", TOK_DENY },
284 { "drop", TOK_DENY },
285 { "reject", TOK_REJECT },
286 { "reset", TOK_RESET },
287 { "unreach", TOK_UNREACH },
288 { "check-state", TOK_CHECKSTATE },
293 struct _s_x rule_options[] = {
297 { "limit", TOK_LIMIT },
298 { "keep-state", TOK_KEEPSTATE },
299 { "bridged", TOK_LAYER2 },
300 { "layer2", TOK_LAYER2 },
302 { "xmit", TOK_XMIT },
303 { "recv", TOK_RECV },
305 { "fragment", TOK_FRAG },
306 { "frag", TOK_FRAG },
307 { "ipoptions", TOK_IPOPTS },
308 { "ipopts", TOK_IPOPTS },
309 { "iplen", TOK_IPLEN },
310 { "ipid", TOK_IPID },
311 { "ipprecedence", TOK_IPPRECEDENCE },
312 { "iptos", TOK_IPTOS },
313 { "ipttl", TOK_IPTTL },
314 { "ipversion", TOK_IPVER },
315 { "ipver", TOK_IPVER },
316 { "estab", TOK_ESTAB },
317 { "established", TOK_ESTAB },
318 { "setup", TOK_SETUP },
319 { "tcpflags", TOK_TCPFLAGS },
320 { "tcpflgs", TOK_TCPFLAGS },
321 { "tcpoptions", TOK_TCPOPTS },
322 { "tcpopts", TOK_TCPOPTS },
323 { "tcpseq", TOK_TCPSEQ },
324 { "tcpack", TOK_TCPACK },
325 { "tcpwin", TOK_TCPWIN },
326 { "icmptype", TOK_ICMPTYPES },
327 { "icmptypes", TOK_ICMPTYPES },
328 { "dst-ip", TOK_DSTIP },
329 { "src-ip", TOK_SRCIP },
330 { "dst-port", TOK_DSTPORT },
331 { "src-port", TOK_SRCPORT },
332 { "proto", TOK_PROTO },
335 { "mac-type", TOK_MACTYPE },
337 { "not", TOK_NOT }, /* pseudo option */
338 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
339 { "or", TOK_OR }, /* pseudo option */
340 { "|", /* escape */ TOK_OR }, /* pseudo option */
341 { "{", TOK_STARTBRACE }, /* pseudo option */
342 { "(", TOK_STARTBRACE }, /* pseudo option */
343 { "}", TOK_ENDBRACE }, /* pseudo option */
344 { ")", TOK_ENDBRACE }, /* pseudo option */
350 * match_token takes a table and a string, returns the value associated
351 * with the string (0 meaning an error in most cases)
354 match_token(struct _s_x *table, char *string)
357 int i = strlen(string);
359 for (pt = table ; i && pt->s != NULL ; pt++)
360 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
366 match_value(struct _s_x *p, u_int32_t value)
368 for (; p->s != NULL; p++)
375 * prints one port, symbolic or numeric
378 print_port(int proto, u_int16_t port)
381 if (proto == IPPROTO_ETHERTYPE) {
384 if (do_resolv && (s = match_value(ether_types, port)) )
387 printf("0x%04x", port);
389 struct servent *se = NULL;
391 struct protoent *pe = getprotobynumber(proto);
393 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
396 printf("%s", se->s_name);
403 * print the values in a list of ports
404 * XXX todo: add support for mask.
407 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
409 u_int16_t *p = cmd->ports;
413 if (cmd->o.len & F_NOT)
416 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
417 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
418 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
420 print_port(proto, p[0]);
423 print_port(proto, p[1]);
430 * Like strtol, but also translates service names into port numbers
431 * for some protocols.
433 * proto == -1 disables the protocol check;
434 * proto == IPPROTO_ETHERTYPE looks up an internal table
435 * proto == <some value in /etc/protocols> matches the values there.
436 * Returns *end == s in case the parameter is not found.
439 strtoport(char *s, char **end, int base, int proto)
445 *end = s; /* default - not found */
447 return 0; /* not found */
450 return strtol(s, end, base);
453 * find separator. '\\' escapes the next char.
455 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
456 if (*s1 == '\\' && s1[1] != '\0')
459 buf = malloc(s1 - s + 1);
464 * copy into a buffer skipping backslashes
466 for (p = s, i = 0; p != s1 ; p++)
471 if (proto == IPPROTO_ETHERTYPE) {
472 i = match_token(ether_types, buf);
474 if (i != -1) { /* found */
479 struct protoent *pe = NULL;
483 pe = getprotobynumber(proto);
485 se = getservbyname(buf, pe ? pe->p_name : NULL);
489 return ntohs(se->s_port);
492 return 0; /* not found */
496 * fill the body of the command with the list of port ranges.
497 * At the moment it only understands numeric ranges.
500 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
502 u_int16_t *p = cmd->ports;
509 a = strtoport(av, &s, 0, proto);
510 if (s == av) /* no parameter */
512 if (*s == '-') { /* a range */
514 b = strtoport(av, &s, 0, proto);
515 if (s == av) /* no parameter */
519 } else if (*s == ',' || *s == '\0' ) {
521 } else { /* invalid separator */
522 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
530 if (i+1 > F_LEN_MASK)
531 errx(EX_DATAERR, "too many ports/ranges\n");
532 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
537 static struct _s_x icmpcodes[] = {
538 { "net", ICMP_UNREACH_NET },
539 { "host", ICMP_UNREACH_HOST },
540 { "protocol", ICMP_UNREACH_PROTOCOL },
541 { "port", ICMP_UNREACH_PORT },
542 { "needfrag", ICMP_UNREACH_NEEDFRAG },
543 { "srcfail", ICMP_UNREACH_SRCFAIL },
544 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
545 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
546 { "isolated", ICMP_UNREACH_ISOLATED },
547 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
548 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
549 { "tosnet", ICMP_UNREACH_TOSNET },
550 { "toshost", ICMP_UNREACH_TOSHOST },
551 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
552 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
553 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
558 fill_reject_code(u_short *codep, char *str)
563 val = strtoul(str, &s, 0);
564 if (s == str || *s != '\0' || val >= 0x100)
565 val = match_token(icmpcodes, str);
567 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
573 print_reject_code(u_int16_t code)
575 char *s = match_value(icmpcodes, code);
578 printf("unreach %s", s);
580 printf("unreach %u", code);
584 * Returns the number of bits set (from left) in a contiguous bitmask,
585 * or -1 if the mask is not contiguous.
586 * XXX this needs a proper fix.
587 * This effectively works on masks in big-endian (network) format.
588 * when compiled on little endian architectures.
590 * First bit is bit 7 of the first byte -- note, for MAC addresses,
591 * the first bit on the wire is bit 0 of the first byte.
592 * len is the max length in bits.
595 contigmask(u_char *p, int len)
598 for (i=0; i<len ; i++)
599 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
601 for (n=i+1; n < len; n++)
602 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
603 return -1; /* mask not contiguous */
608 * print flags set/clear in the two bitmasks passed as parameters.
609 * There is a specialized check for f_tcpflags.
612 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list)
616 u_char set = cmd->arg1 & 0xff;
617 u_char clear = (cmd->arg1 >> 8) & 0xff;
619 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
624 printf(" %s ", name);
625 for (i=0; list[i].x != 0; i++) {
626 if (set & list[i].x) {
628 printf("%s%s", comma, list[i].s);
631 if (clear & list[i].x) {
633 printf("%s!%s", comma, list[i].s);
640 * Print the ip address contained in a command.
643 print_ip(ipfw_insn_ip *cmd, char *s)
645 struct hostent *he = NULL;
648 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
650 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
654 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
661 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
662 printf("%s/%d", inet_ntoa(cmd->addr),
663 contigmask((u_char *)&x, 32));
664 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
665 x &= 0xff; /* base */
666 d = (u_int32_t *)&(cmd->mask);
667 for (i=0; i < cmd->o.arg1; i++)
668 if (d[ i/32] & (1<<(i & 31))) {
669 printf("%c%d", comma, i+x);
675 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
678 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
679 if (mb == 32 && do_resolv)
680 he = gethostbyaddr((char *)&(cmd->addr.s_addr),
681 sizeof(u_long), AF_INET);
682 if (he != NULL) /* resolved to name */
683 printf("%s", he->h_name);
684 else if (mb == 0) /* any */
686 else { /* numeric IP followed by some kind of mask */
687 printf("%s", inet_ntoa(cmd->addr));
689 printf(":%s", inet_ntoa(cmd->mask));
696 * prints a MAC address/mask pair
699 print_mac(u_char *addr, u_char *mask)
701 int l = contigmask(mask, 48);
706 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
707 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
709 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
710 mask[0], mask[1], mask[2],
711 mask[3], mask[4], mask[5]);
718 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
727 type = strtoul(av, &av, 0);
729 if (*av != ',' && *av != '\0')
730 errx(EX_DATAERR, "invalid ICMP type");
733 errx(EX_DATAERR, "ICMP type out of range");
735 cmd->d[0] |= 1 << type;
737 cmd->o.opcode = O_ICMPTYPE;
738 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
742 print_icmptypes(ipfw_insn_u32 *cmd)
747 printf(" icmptypes");
748 for (i = 0; i < 32; i++) {
749 if ( (cmd->d[0] & (1 << (i))) == 0)
751 printf("%c%d", sep, i);
757 * show_ipfw() prints the body of an ipfw rule.
758 * Because the standard rule has at least proto src_ip dst_ip, we use
759 * a helper function to produce these entries if not provided explicitly.
760 * The first argument is the list of fields we have, the second is
761 * the list of fields we want to be printed.
763 * Special cases if we have provided a MAC header:
764 * + if the rule does not contain IP addresses/ports, do not print them;
765 * + if the rule does not contain an IP proto, print "all" instead of "ip";
767 * Once we have 'have_options', IP header fields are printed as options.
769 #define HAVE_PROTO 0x0001
770 #define HAVE_SRCIP 0x0002
771 #define HAVE_DSTIP 0x0004
772 #define HAVE_MAC 0x0008
773 #define HAVE_MACTYPE 0x0010
774 #define HAVE_OPTIONS 0x8000
776 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
778 show_prerequisites(int *flags, int want, int cmd)
780 if ( (*flags & HAVE_IP) == HAVE_IP)
781 *flags |= HAVE_OPTIONS;
783 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
786 * mac-type was optimized out by the compiler,
790 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
793 if ( !(*flags & HAVE_OPTIONS)) {
794 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
796 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
798 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
805 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
807 static int twidth = 0;
810 int proto = 0; /* default */
811 int flags = 0; /* prerequisites */
812 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
813 int or_block = 0; /* we are in an or block */
815 u_int32_t set_disable = (u_int32_t)(rule->next_rule);
817 if (set_disable & (1 << rule->set)) { /* disabled */
821 printf("# DISABLED ");
823 printf("%05u ", rule->rulenum);
826 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth,
833 strcpy(timestr, ctime((time_t *)&twidth));
834 *strchr(timestr, '\n') = '\0';
835 twidth = strlen(timestr);
837 if (rule->timestamp) {
838 #if _FreeBSD_version < 500000 /* XXX check */
839 #define _long_to_time(x) (time_t)(x)
841 time_t t = _long_to_time(rule->timestamp);
843 strcpy(timestr, ctime(&t));
844 *strchr(timestr, '\n') = '\0';
845 printf("%s ", timestr);
847 printf("%*s ", twidth, " ");
852 printf("set %d ", rule->set);
855 * print the optional "match probability"
857 if (rule->cmd_len > 0) {
859 if (cmd->opcode == O_PROB) {
860 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
861 double d = 1.0 * p->d[0];
863 d = (d / 0x7fffffff);
864 printf("prob %f ", d);
869 * first print actions
871 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
872 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
873 switch(cmd->opcode) {
875 printf("check-state");
876 flags = HAVE_IP; /* avoid printing anything else */
892 if (cmd->arg1 == ICMP_REJECT_RST)
894 else if (cmd->arg1 == ICMP_UNREACH_HOST)
897 print_reject_code(cmd->arg1);
901 printf("skipto %u", cmd->arg1);
905 printf("pipe %u", cmd->arg1);
909 printf("queue %u", cmd->arg1);
913 printf("divert %u", cmd->arg1);
917 printf("tee %u", cmd->arg1);
922 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
924 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
926 printf(",%d", s->sa.sin_port);
930 case O_LOG: /* O_LOG is printed last */
931 logptr = (ipfw_insn_log *)cmd;
935 printf("** unrecognized action %d len %d",
936 cmd->opcode, cmd->len);
940 if (logptr->max_log > 0)
941 printf(" log logamount %d", logptr->max_log);
947 * then print the body.
949 if (rule->_pad & 1) { /* empty rules before options */
951 printf(" ip from any to any");
952 flags |= HAVE_IP | HAVE_OPTIONS;
955 for (l = rule->act_ofs, cmd = rule->cmd ;
956 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
958 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
960 show_prerequisites(&flags, 0, cmd->opcode);
962 switch(cmd->opcode) {
964 break; /* done already */
967 break; /* no need to print anything here */
970 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
972 if ((cmd->len & F_OR) && !or_block)
974 if (cmd->len & F_NOT)
978 print_mac( m->addr, m->mask);
979 print_mac( m->addr + 6, m->mask + 6);
984 if ((cmd->len & F_OR) && !or_block)
986 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
987 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
988 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
995 show_prerequisites(&flags, HAVE_PROTO, 0);
996 if (!(flags & HAVE_SRCIP))
998 if ((cmd->len & F_OR) && !or_block)
1000 print_ip((ipfw_insn_ip *)cmd,
1001 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1002 flags |= HAVE_SRCIP;
1009 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1010 if (!(flags & HAVE_DSTIP))
1012 if ((cmd->len & F_OR) && !or_block)
1014 print_ip((ipfw_insn_ip *)cmd,
1015 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1016 flags |= HAVE_DSTIP;
1020 show_prerequisites(&flags, HAVE_IP, 0);
1022 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1023 if ((cmd->len & F_OR) && !or_block)
1025 print_newports((ipfw_insn_u16 *)cmd, proto,
1026 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1030 struct protoent *pe;
1032 if ((cmd->len & F_OR) && !or_block)
1034 if (cmd->len & F_NOT)
1037 pe = getprotobynumber(cmd->arg1);
1038 if (flags & HAVE_OPTIONS)
1041 printf(" %s", pe->p_name);
1043 printf(" %u", cmd->arg1);
1045 flags |= HAVE_PROTO;
1048 default: /*options ... */
1049 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1050 if ((cmd->len & F_OR) && !or_block)
1052 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1054 switch(cmd->opcode) {
1060 printf(cmd->len & F_NOT ? " out" : " in");
1070 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1072 if (cmd->opcode == O_XMIT)
1074 else if (cmd->opcode == O_RECV)
1076 else if (cmd->opcode == O_VIA)
1080 if (cmdif->name[0] == '\0')
1082 inet_ntoa(cmdif->p.ip));
1083 printf(" %s %s", s, cmdif->name);
1088 printf(" ipid %u", cmd->arg1 );
1092 printf(" ipttl %u", cmd->arg1 );
1096 printf(" ipver %u", cmd->arg1 );
1099 case O_IPPRECEDENCE:
1100 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1104 printf(" iplen %u", cmd->arg1 );
1108 print_flags("ipoptions", cmd, f_ipopts);
1112 print_flags("iptos", cmd, f_iptos);
1116 print_icmptypes((ipfw_insn_u32 *)cmd);
1120 printf(" established");
1124 print_flags("tcpflags", cmd, f_tcpflags);
1128 print_flags("tcpoptions", cmd, f_tcpopts);
1132 printf(" tcpwin %d", ntohs(cmd->arg1));
1136 printf(" tcpack %ld", ntohl(cmd32->d[0]));
1140 printf(" tcpseq %ld", ntohl(cmd32->d[0]));
1145 struct passwd *pwd = getpwuid(cmd32->d[0]);
1148 printf(" uid %s", pwd->pw_name);
1150 printf(" uid %u", cmd32->d[0]);
1156 struct group *grp = getgrgid(cmd32->d[0]);
1159 printf(" gid %s", grp->gr_name);
1161 printf(" gid %u", cmd32->d[0]);
1166 printf(" keep-state");
1171 struct _s_x *p = limit_masks;
1172 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1173 u_int8_t x = c->limit_mask;
1177 for ( ; p->x != 0 ; p++)
1178 if ((x & p->x) == p->x) {
1180 printf("%s%s", comma, p->s);
1183 printf(" %d", c->conn_limit);
1188 printf(" [opcode %d len %d]",
1189 cmd->opcode, cmd->len);
1192 if (cmd->len & F_OR) {
1195 } else if (or_block) {
1200 show_prerequisites(&flags, HAVE_IP, 0);
1206 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1208 struct protoent *pe;
1212 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1216 printf("%05d %*llu %*llu (%ds)", (int)(d->rule), pcwidth, d->pcnt,
1217 bcwidth, d->bcnt, d->expire);
1218 switch (d->dyn_type) {
1219 case O_LIMIT_PARENT:
1220 printf(" PARENT %d", d->count);
1225 case O_KEEP_STATE: /* bidir, no mask */
1230 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1231 printf(" %s", pe->p_name);
1233 printf(" proto %u", d->id.proto);
1235 a.s_addr = htonl(d->id.src_ip);
1236 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1238 a.s_addr = htonl(d->id.dst_ip);
1239 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1244 sort_q(const void *pa, const void *pb)
1246 int rev = (do_sort < 0);
1247 int field = rev ? -do_sort : do_sort;
1249 const struct dn_flow_queue *a = pa;
1250 const struct dn_flow_queue *b = pb;
1254 res = a->len - b->len;
1257 res = a->len_bytes - b->len_bytes;
1260 case 3: /* tot pkts */
1261 res = a->tot_pkts - b->tot_pkts;
1264 case 4: /* tot bytes */
1265 res = a->tot_bytes - b->tot_bytes;
1272 return (int)(rev ? res : -res);
1276 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q)
1280 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1281 fs->flow_mask.proto,
1282 fs->flow_mask.src_ip, fs->flow_mask.src_port,
1283 fs->flow_mask.dst_ip, fs->flow_mask.dst_port);
1284 if (fs->rq_elements == 0)
1287 printf("BKT Prot ___Source IP/port____ "
1288 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1290 heapsort(q, fs->rq_elements, sizeof *q, sort_q);
1291 for (l = 0; l < fs->rq_elements; l++) {
1293 struct protoent *pe;
1295 ina.s_addr = htonl(q[l].id.src_ip);
1296 printf("%3d ", q[l].hash_slot);
1297 pe = getprotobynumber(q[l].id.proto);
1299 printf("%-4s ", pe->p_name);
1301 printf("%4u ", q[l].id.proto);
1302 printf("%15s/%-5d ",
1303 inet_ntoa(ina), q[l].id.src_port);
1304 ina.s_addr = htonl(q[l].id.dst_ip);
1305 printf("%15s/%-5d ",
1306 inet_ntoa(ina), q[l].id.dst_port);
1307 printf("%4qu %8qu %2u %4u %3u\n",
1308 q[l].tot_pkts, q[l].tot_bytes,
1309 q[l].len, q[l].len_bytes, q[l].drops);
1311 printf(" S %20qd F %20qd\n",
1317 print_flowset_parms(struct dn_flow_set *fs, char *prefix)
1322 char red[90]; /* Display RED parameters */
1325 if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1327 sprintf(qs, "%d KB", l / 1024);
1329 sprintf(qs, "%d B", l);
1331 sprintf(qs, "%3d sl.", l);
1333 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1336 if (fs->flags_fs & DN_IS_RED) /* RED parameters */
1338 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
1339 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1340 1.0 * fs->w_q / (double)(1 << SCALE_RED),
1341 SCALE_VAL(fs->min_th),
1342 SCALE_VAL(fs->max_th),
1343 1.0 * fs->max_p / (double)(1 << SCALE_RED));
1345 sprintf(red, "droptail");
1347 printf("%s %s%s %d queues (%d buckets) %s\n",
1348 prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1352 list_pipes(void *data, int nbytes, int ac, char *av[])
1356 struct dn_pipe *p = (struct dn_pipe *) data;
1357 struct dn_flow_set *fs;
1358 struct dn_flow_queue *q;
1362 rulenum = strtoul(*av++, NULL, 10);
1365 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) {
1366 double b = p->bandwidth;
1370 if (p->next != (struct dn_pipe *)DN_IS_PIPE)
1371 break; /* done with pipes, now queues */
1374 * compute length, as pipe have variable size
1376 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1377 next = (void *)p + l;
1380 if (rulenum != 0 && rulenum != p->pipe_nr)
1384 * Print rate (or clocking interface)
1386 if (p->if_name[0] != '\0')
1387 sprintf(buf, "%s", p->if_name);
1389 sprintf(buf, "unlimited");
1390 else if (b >= 1000000)
1391 sprintf(buf, "%7.3f Mbit/s", b/1000000);
1393 sprintf(buf, "%7.3f Kbit/s", b/1000);
1395 sprintf(buf, "%7.3f bit/s ", b);
1397 sprintf(prefix, "%05d: %s %4d ms ",
1398 p->pipe_nr, buf, p->delay);
1399 print_flowset_parms(&(p->fs), prefix);
1401 printf(" V %20qd\n", p->V >> MY_M);
1403 q = (struct dn_flow_queue *)(p+1);
1404 list_queues(&(p->fs), q);
1406 for (fs = next; nbytes >= sizeof *fs; fs = next) {
1409 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE)
1411 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1412 next = (void *)fs + l;
1414 q = (struct dn_flow_queue *)(fs+1);
1415 sprintf(prefix, "q%05d: weight %d pipe %d ",
1416 fs->fs_nr, fs->weight, fs->parent_nr);
1417 print_flowset_parms(fs, prefix);
1423 * This one handles all set-related commands
1424 * ipfw set { show | enable | disable }
1426 * ipfw set move X to Y
1427 * ipfw set move rule X to Y
1430 sets_handler(int ac, char *av[])
1432 u_int32_t set_disable, masks[2];
1435 u_int8_t cmd, new_set;
1441 errx(EX_USAGE, "set needs command");
1442 if (!strncmp(*av, "show", strlen(*av)) ) {
1446 nbytes = sizeof(struct ip_fw);
1447 if ((data = malloc(nbytes)) == NULL)
1448 err(EX_OSERR, "malloc");
1449 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1450 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1451 set_disable = (u_int32_t)(((struct ip_fw *)data)->next_rule);
1453 for (i = 0, msg = "disable" ; i < 31; i++)
1454 if ( (set_disable & (1<<i))) {
1455 printf("%s %d", msg, i);
1458 msg = (set_disable) ? " enable" : "enable";
1459 for (i = 0; i < 31; i++)
1460 if ( !(set_disable & (1<<i))) {
1461 printf("%s %d", msg, i);
1465 } else if (!strncmp(*av, "swap", strlen(*av))) {
1468 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1469 rulenum = atoi(av[0]);
1470 new_set = atoi(av[1]);
1471 if (!isdigit(*(av[0])) || rulenum > 30)
1472 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1473 if (!isdigit(*(av[1])) || new_set > 30)
1474 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1475 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1476 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1477 masks, sizeof(u_int32_t));
1478 } else if (!strncmp(*av, "move", strlen(*av))) {
1480 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1485 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1486 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1487 rulenum = atoi(av[0]);
1488 new_set = atoi(av[2]);
1489 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1490 (cmd == 2 && rulenum == 65535) )
1491 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1492 if (!isdigit(*(av[2])) || new_set > 30)
1493 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1494 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1495 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1496 masks, sizeof(u_int32_t));
1497 } else if (!strncmp(*av, "disable", strlen(*av)) ||
1498 !strncmp(*av, "enable", strlen(*av)) ) {
1499 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0;
1502 masks[0] = masks[1] = 0;
1505 if (isdigit(**av)) {
1507 if (i < 0 || i > 30)
1509 "invalid set number %d\n", i);
1510 masks[which] |= (1<<i);
1511 } else if (!strncmp(*av, "disable", strlen(*av)))
1513 else if (!strncmp(*av, "enable", strlen(*av)))
1517 "invalid set command %s\n", *av);
1520 if ( (masks[0] & masks[1]) != 0 )
1522 "cannot enable and disable the same set\n");
1524 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1526 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1528 errx(EX_USAGE, "invalid set command %s\n", *av);
1532 sysctl_handler(int ac, char *av[], int which)
1538 warnx("missing keyword to enable/disable\n");
1539 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1540 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1541 &which, sizeof(which));
1542 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1543 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1544 &which, sizeof(which));
1545 } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1546 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1547 &which, sizeof(which));
1548 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1549 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1550 &which, sizeof(which));
1551 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1552 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1553 &which, sizeof(which));
1555 warnx("unrecognize enable/disable keyword: %s\n", *av);
1560 list(int ac, char *av[])
1563 ipfw_dyn_rule *dynrules, *d;
1565 void *lim, *data = NULL;
1566 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1567 int exitval = EX_OK;
1574 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1575 int nalloc = 1024; /* start somewhere... */
1580 /* get rules or pipes from kernel, resizing array as necessary */
1583 while (nbytes >= nalloc) {
1584 nalloc = nalloc * 2 + 200;
1586 if ((data = realloc(data, nbytes)) == NULL)
1587 err(EX_OSERR, "realloc");
1588 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1589 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1590 do_pipe ? "DUMMYNET" : "FW");
1594 list_pipes(data, nbytes, ac, av);
1599 * Count static rules. They have variable size so we
1600 * need to scan the list to count them.
1602 for (nstat = 1, r = data, lim = data + nbytes;
1603 r->rulenum < 65535 && (void *)r < lim;
1604 ++nstat, r = (void *)r + RULESIZE(r) )
1608 * Count dynamic rules. This is easier as they have
1611 r = (void *)r + RULESIZE(r);
1612 dynrules = (ipfw_dyn_rule *)r ;
1613 n = (void *)r - data;
1614 ndyn = (nbytes - n) / sizeof *dynrules;
1616 /* if showing stats, figure out column widths ahead of time */
1617 bcwidth = pcwidth = 0;
1619 for (n = 0, r = data; n < nstat;
1620 n++, r = (void *)r + RULESIZE(r)) {
1621 /* packet counter */
1622 width = snprintf(NULL, 0, "%llu", r->pcnt);
1623 if (width > pcwidth)
1627 width = snprintf(NULL, 0, "%llu", r->bcnt);
1628 if (width > bcwidth)
1632 if (do_dynamic && ndyn) {
1633 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1634 width = snprintf(NULL, 0, "%llu", d->pcnt);
1635 if (width > pcwidth)
1638 width = snprintf(NULL, 0, "%llu", d->bcnt);
1639 if (width > bcwidth)
1643 /* if no rule numbers were specified, list all rules */
1645 for (n = 0, r = data; n < nstat;
1646 n++, r = (void *)r + RULESIZE(r) )
1647 show_ipfw(r, pcwidth, bcwidth);
1649 if (do_dynamic && ndyn) {
1650 printf("## Dynamic rules (%d):\n", ndyn);
1651 for (n = 0, d = dynrules; n < ndyn; n++, d++)
1652 show_dyn_ipfw(d, pcwidth, bcwidth);
1657 /* display specific rules requested on command line */
1659 for (lac = ac, lav = av; lac != 0; lac--) {
1660 /* convert command line rule # */
1661 rnum = strtoul(*lav++, &endptr, 10);
1664 warnx("invalid rule number: %s", *(lav - 1));
1667 for (n = seen = 0, r = data; n < nstat;
1668 n++, r = (void *)r + RULESIZE(r) ) {
1669 if (r->rulenum > rnum)
1671 if (r->rulenum == rnum) {
1672 show_ipfw(r, pcwidth, bcwidth);
1677 /* give precedence to other error(s) */
1678 if (exitval == EX_OK)
1679 exitval = EX_UNAVAILABLE;
1680 warnx("rule %lu does not exist", rnum);
1684 if (do_dynamic && ndyn) {
1685 printf("## Dynamic rules:\n");
1686 for (lac = ac, lav = av; lac != 0; lac--) {
1687 rnum = strtoul(*lav++, &endptr, 10);
1689 /* already warned */
1691 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1692 if ((int)(d->rule) > rnum)
1694 if ((int)(d->rule) == rnum)
1695 show_dyn_ipfw(d, pcwidth, bcwidth);
1705 if (exitval != EX_OK)
1712 fprintf(stderr, "usage: ipfw [options]\n"
1713 " add [number] rule\n"
1714 " pipe number config [pipeconfig]\n"
1715 " queue number config [queueconfig]\n"
1717 " [pipe] delete number ...\n"
1718 " [pipe] {list|show} [number ...]\n"
1719 " {zero|resetlog} [number ...]\n"
1720 "do \"ipfw -h\" or see ipfw manpage for details\n"
1730 fprintf(stderr, "ipfw syntax summary:\n"
1731 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1732 "ipfw {pipe|queue} N config BODY\n"
1733 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1735 "RULE: [1..] [PROB] BODY\n"
1736 "RULENUM: INTEGER(1..65534)\n"
1737 "PROB: prob REAL(0..1)\n"
1738 "BODY: check-state [LOG] (no body) |\n"
1739 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1740 "ACTION: check-state | allow | count | deny | reject | skipto N |\n"
1741 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1742 "ADDR: [ MAC dst src ether_type ] \n"
1743 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1744 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n"
1745 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1746 "OPTION_LIST: OPTION [,OPTION_LIST]\n"
1753 lookup_host (char *host, struct in_addr *ipaddr)
1757 if (!inet_aton(host, ipaddr)) {
1758 if ((he = gethostbyname(host)) == NULL)
1760 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1766 * fills the addr and mask fields in the instruction as appropriate from av.
1767 * Update length as appropriate.
1768 * The following formats are allowed:
1769 * any matches any IP. Actually returns an empty instruction.
1770 * me returns O_IP_*_ME
1771 * 1.2.3.4 single IP address
1772 * 1.2.3.4:5.6.7.8 address:mask
1773 * 1.2.3.4/24 address/mask
1774 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1777 fill_ip(ipfw_insn_ip *cmd, char *av)
1779 char *p = 0, md = 0;
1782 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1784 if (!strncmp(av, "any", strlen(av)))
1787 if (!strncmp(av, "me", strlen(av))) {
1788 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1792 p = strchr(av, '/');
1794 p = strchr(av, ':');
1800 if (lookup_host(av, &cmd->addr) != 0)
1801 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1804 if (!inet_aton(p, &cmd->mask))
1805 errx(EX_DATAERR, "bad netmask ``%s''", p);
1810 cmd->mask.s_addr = htonl(0);
1812 errx(EX_DATAERR, "bad width ``%s''", p);
1814 cmd->mask.s_addr = htonl(~0 << (32 - i));
1817 cmd->mask.s_addr = htonl(~0);
1820 cmd->addr.s_addr &= cmd->mask.s_addr;
1822 * now look if we have a set of addresses. They are stored as follows:
1823 * arg1 is the set size (powers of 2, 2..256)
1824 * addr is the base address IN HOST FORMAT
1825 * mask.. is an array of u_int32_t with bits set.
1829 if (p) { /* fetch addresses */
1832 int i = contigmask((u_char *)&(cmd->mask), 32);
1834 if (i < 24 || i > 31) {
1835 fprintf(stderr, "invalid set with mask %d\n",
1839 cmd->o.arg1 = 1<<(32-i);
1840 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1841 d = (u_int32_t *)&cmd->mask;
1842 cmd->o.opcode = O_IP_DST_SET; /* default */
1843 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1844 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
1845 d[i] = 0; /* clear masks */
1848 low = cmd->addr.s_addr & 0xff;
1849 high = low + cmd->o.arg1 - 1;
1850 while (isdigit(*av)) {
1852 u_int16_t a = strtol(av, &s, 0);
1854 if (s == av) /* no parameter */
1856 if (a < low || a > high) {
1857 fprintf(stderr, "addr %d out of range [%d-%d]\n",
1862 d[ a/32] |= 1<<(a & 31);
1870 if (cmd->mask.s_addr == 0) { /* any */
1871 if (cmd->o.len & F_NOT)
1872 errx(EX_DATAERR, "not any never matches");
1873 else /* useless, nuke it */
1875 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */
1876 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1877 else /* addr/mask */
1878 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1883 * helper function to process a set of flags and set bits in the
1884 * appropriate masks.
1887 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1888 struct _s_x *flags, char *p)
1890 u_int8_t set=0, clear=0;
1893 char *q; /* points to the separator */
1895 u_int8_t *which; /* mask we are working on */
1905 val = match_token(flags, p);
1907 errx(EX_DATAERR, "invalid flag %s", p);
1908 *which |= (u_int8_t)val;
1911 cmd->opcode = opcode;
1912 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
1913 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
1918 delete(int ac, char *av[])
1921 struct dn_pipe pipe;
1923 int exitval = EX_OK;
1926 memset(&pipe, 0, sizeof pipe);
1929 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
1930 do_set = 1; /* delete set */
1935 while (ac && isdigit(**av)) {
1936 i = atoi(*av); av++; ac--;
1942 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
1943 &pipe, sizeof pipe);
1946 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
1947 do_pipe == 1 ? pipe.pipe_nr :
1951 rulenum = (i & 0xffff) | (do_set << 24);
1952 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
1955 exitval = EX_UNAVAILABLE;
1956 warn("rule %u: setsockopt(IP_FW_DEL)",
1961 if (exitval != EX_OK)
1967 * fill the interface structure. We do not check the name as we can
1968 * create interfaces dynamically, so checking them at insert time
1969 * makes relatively little sense.
1970 * Interface names containing '*', '?', or '[' are assumed to be shell
1971 * patterns which match interfaces.
1974 fill_iface(ipfw_insn_if *cmd, char *arg)
1976 cmd->name[0] = '\0';
1977 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
1979 /* Parse the interface or address */
1980 if (!strcmp(arg, "any"))
1981 cmd->o.len = 0; /* effectively ignore this command */
1982 else if (!isdigit(*arg)) {
1983 strlcpy(cmd->name, arg, sizeof(cmd->name));
1984 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
1985 } else if (!inet_aton(arg, &cmd->p.ip))
1986 errx(EX_DATAERR, "bad ip address ``%s''", arg);
1989 static unsigned long
1990 getbw(const char *str, u_short *flags, int kb)
1996 val = strtoul(str, &end, 0);
1997 if (*end == 'k' || *end == 'K') {
2000 } else if (*end == 'm' || *end == 'M') {
2006 * Deal with bits or bytes or b(bits) or B(bytes). If there is no
2007 * trailer assume bits.
2009 if (strncasecmp(end, "bit", 3) == 0) {
2011 } else if (strncasecmp(end, "byte", 4) == 0) {
2013 } else if (*end == 'b') {
2015 } else if (*end == 'B') {
2020 * Return in bits if flags is NULL, else flag bits
2021 * or bytes in flags and return the unconverted value.
2023 if (inbytes && flags)
2024 *flags |= DN_QSIZE_IS_BYTES;
2025 else if (inbytes && flags == NULL)
2031 * the following macro returns an error message if we run out of
2034 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
2037 config_pipe(int ac, char **av)
2039 struct dn_pipe pipe;
2045 memset(&pipe, 0, sizeof pipe);
2049 if (ac && isdigit(**av)) {
2050 i = atoi(*av); av++; ac--;
2058 int tok = match_token(dummynet_params, *av);
2063 pipe.fs.flags_fs |= DN_NOERROR;
2067 NEED1("plr needs argument 0..1\n");
2068 d = strtod(av[0], NULL);
2073 pipe.fs.plr = (int)(d*0x7fffffff);
2078 NEED1("queue needs queue size\n");
2080 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2085 NEED1("buckets needs argument\n");
2086 pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2091 NEED1("mask needs mask specifier\n");
2093 * per-flow queue, mask is dst_ip, dst_port,
2094 * src_ip, src_port, proto measured in bits
2098 pipe.fs.flow_mask.dst_ip = 0;
2099 pipe.fs.flow_mask.src_ip = 0;
2100 pipe.fs.flow_mask.dst_port = 0;
2101 pipe.fs.flow_mask.src_port = 0;
2102 pipe.fs.flow_mask.proto = 0;
2106 u_int32_t *p32 = NULL;
2107 u_int16_t *p16 = NULL;
2109 tok = match_token(dummynet_params, *av);
2114 * special case, all bits significant
2116 pipe.fs.flow_mask.dst_ip = ~0;
2117 pipe.fs.flow_mask.src_ip = ~0;
2118 pipe.fs.flow_mask.dst_port = ~0;
2119 pipe.fs.flow_mask.src_port = ~0;
2120 pipe.fs.flow_mask.proto = ~0;
2121 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2125 p32 = &pipe.fs.flow_mask.dst_ip;
2129 p32 = &pipe.fs.flow_mask.src_ip;
2133 p16 = &pipe.fs.flow_mask.dst_port;
2137 p16 = &pipe.fs.flow_mask.src_port;
2144 ac++; av--; /* backtrack */
2148 errx(EX_USAGE, "mask: value missing");
2149 if (*av[0] == '/') {
2150 a = strtoul(av[0]+1, &end, 0);
2151 a = (a == 32) ? ~0 : (1 << a) - 1;
2153 a = strtoul(av[0], &end, 0);
2156 else if (p16 != NULL) {
2159 "mask: must be 16 bit");
2160 *p16 = (u_int16_t)a;
2164 "mask: must be 8 bit");
2165 pipe.fs.flow_mask.proto = (u_int8_t)a;
2168 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2170 } /* end while, config masks */
2176 NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2177 pipe.fs.flags_fs |= DN_IS_RED;
2178 if (tok == TOK_GRED)
2179 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2181 * the format for parameters is w_q/min_th/max_th/max_p
2183 if ((end = strsep(&av[0], "/"))) {
2184 double w_q = strtod(end, NULL);
2185 if (w_q > 1 || w_q <= 0)
2186 errx(EX_DATAERR, "0 < w_q <= 1");
2187 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2189 if ((end = strsep(&av[0], "/"))) {
2190 pipe.fs.min_th = strtoul(end, &end, 0);
2191 if (*end == 'K' || *end == 'k')
2192 pipe.fs.min_th *= 1024;
2194 if ((end = strsep(&av[0], "/"))) {
2195 pipe.fs.max_th = strtoul(end, &end, 0);
2196 if (*end == 'K' || *end == 'k')
2197 pipe.fs.max_th *= 1024;
2199 if ((end = strsep(&av[0], "/"))) {
2200 double max_p = strtod(end, NULL);
2201 if (max_p > 1 || max_p <= 0)
2202 errx(EX_DATAERR, "0 < max_p <= 1");
2203 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2209 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2213 NEED1("bw needs bandwidth or interface\n");
2215 errx(EX_DATAERR, "bandwidth only valid for pipes");
2217 * set clocking interface or bandwidth value
2219 if (av[0][0] >= 'a' && av[0][0] <= 'z') {
2220 int l = sizeof(pipe.if_name)-1;
2221 /* interface name */
2222 strncpy(pipe.if_name, av[0], l);
2223 pipe.if_name[l] = '\0';
2226 pipe.if_name[0] = '\0';
2227 pipe.bandwidth = strtoul(av[0], &end, 0);
2228 pipe.bandwidth = getbw(av[0], NULL, 1000);
2229 if (pipe.bandwidth < 0)
2230 errx(EX_DATAERR, "bandwidth too large");
2237 errx(EX_DATAERR, "delay only valid for pipes");
2238 NEED1("delay needs argument 0..10000ms\n");
2239 pipe.delay = strtoul(av[0], NULL, 0);
2245 errx(EX_DATAERR,"weight only valid for queues");
2246 NEED1("weight needs argument 0..100\n");
2247 pipe.fs.weight = strtoul(av[0], &end, 0);
2253 errx(EX_DATAERR,"pipe only valid for queues");
2254 NEED1("pipe needs pipe_number\n");
2255 pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2260 errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2264 if (pipe.pipe_nr == 0)
2265 errx(EX_DATAERR, "pipe_nr must be > 0");
2266 if (pipe.delay > 10000)
2267 errx(EX_DATAERR, "delay must be < 10000");
2268 } else { /* do_pipe == 2, queue */
2269 if (pipe.fs.parent_nr == 0)
2270 errx(EX_DATAERR, "pipe must be > 0");
2271 if (pipe.fs.weight >100)
2272 errx(EX_DATAERR, "weight must be <= 100");
2274 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2275 if (pipe.fs.qsize > 1024*1024)
2276 errx(EX_DATAERR, "queue size must be < 1MB");
2278 if (pipe.fs.qsize > 100)
2279 errx(EX_DATAERR, "2 <= queue size <= 100");
2281 if (pipe.fs.flags_fs & DN_IS_RED) {
2283 int lookup_depth, avg_pkt_size;
2284 double s, idle, weight, w_q;
2285 struct clockinfo clock;
2288 if (pipe.fs.min_th >= pipe.fs.max_th)
2289 errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2290 pipe.fs.min_th, pipe.fs.max_th);
2291 if (pipe.fs.max_th == 0)
2292 errx(EX_DATAERR, "max_th must be > 0");
2295 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2296 &lookup_depth, &len, NULL, 0) == -1)
2298 errx(1, "sysctlbyname(\"%s\")",
2299 "net.inet.ip.dummynet.red_lookup_depth");
2300 if (lookup_depth == 0)
2301 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2302 " must be greater than zero");
2305 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2306 &avg_pkt_size, &len, NULL, 0) == -1)
2308 errx(1, "sysctlbyname(\"%s\")",
2309 "net.inet.ip.dummynet.red_avg_pkt_size");
2310 if (avg_pkt_size == 0)
2312 "net.inet.ip.dummynet.red_avg_pkt_size must"
2313 " be greater than zero");
2315 len = sizeof(struct clockinfo);
2316 if (sysctlbyname("kern.clockrate", &clock, &len, NULL, 0) == -1)
2317 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate");
2320 * Ticks needed for sending a medium-sized packet.
2321 * Unfortunately, when we are configuring a WF2Q+ queue, we
2322 * do not have bandwidth information, because that is stored
2323 * in the parent pipe, and also we have multiple queues
2324 * competing for it. So we set s=0, which is not very
2325 * correct. But on the other hand, why do we want RED with
2328 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2331 s = clock.hz * avg_pkt_size * 8 / pipe.bandwidth;
2334 * max idle time (in ticks) before avg queue size becomes 0.
2335 * NOTA: (3/w_q) is approx the value x so that
2336 * (1-w_q)^x < 10^-3.
2338 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2339 idle = s * 3. / w_q;
2340 pipe.fs.lookup_step = (int)idle / lookup_depth;
2341 if (!pipe.fs.lookup_step)
2342 pipe.fs.lookup_step = 1;
2344 for (t = pipe.fs.lookup_step; t > 0; --t)
2346 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2348 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2351 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2355 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2360 addr[i] = mask[i] = 0;
2361 if (!strcmp(p, "any"))
2364 for (i=0; *p && i<6;i++, p++) {
2365 addr[i] = strtol(p, &p, 16);
2366 if (*p != ':') /* we start with the mask */
2369 if (*p == '/') { /* mask len */
2370 l = strtol(p+1, &p, 0);
2371 for (i=0; l>0; l -=8, i++)
2372 mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2373 } else if (*p == '&') { /* mask */
2374 for (i=0, p++; *p && i<6;i++, p++) {
2375 mask[i] = strtol(p, &p, 16);
2379 } else if (*p == '\0') {
2388 * helper function, updates the pointer to cmd with the length
2389 * of the current command, and also cleans up the first word of
2390 * the new command in case it has been clobbered before.
2393 next_cmd(ipfw_insn *cmd)
2396 bzero(cmd, sizeof(*cmd));
2401 * A function to fill simple commands of size 1.
2402 * Existing flags are preserved.
2405 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2407 cmd->opcode = opcode;
2408 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2413 * Fetch and add the MAC address and type, with masks. This generates one or
2414 * two microinstructions, and returns the pointer to the last one.
2417 add_mac(ipfw_insn *cmd, int ac, char *av[])
2422 errx(EX_DATAERR, "MAC dst src");
2424 cmd->opcode = O_MACADDR2;
2425 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2427 mac = (ipfw_insn_mac *)cmd;
2428 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2429 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2434 add_mactype(ipfw_insn *cmd, int ac, char *av)
2437 errx(EX_DATAERR, "missing MAC type");
2438 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2439 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2440 cmd->opcode = O_MAC_TYPE;
2447 add_proto(ipfw_insn *cmd, char *av)
2449 struct protoent *pe;
2452 if (!strncmp(av, "all", strlen(av)))
2453 ; /* same as "ip" */
2454 else if ((proto = atoi(av)) > 0)
2456 else if ((pe = getprotobyname(av)) != NULL)
2457 proto = pe->p_proto;
2460 if (proto != IPPROTO_IP)
2461 fill_cmd(cmd, O_PROTO, 0, proto);
2466 add_srcip(ipfw_insn *cmd, char *av)
2468 fill_ip((ipfw_insn_ip *)cmd, av);
2469 if (cmd->opcode == O_IP_DST_SET) /* set */
2470 cmd->opcode = O_IP_SRC_SET;
2471 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2472 cmd->opcode = O_IP_SRC_ME;
2473 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2474 cmd->opcode = O_IP_SRC;
2475 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2476 cmd->opcode = O_IP_SRC_MASK;
2481 add_dstip(ipfw_insn *cmd, char *av)
2483 fill_ip((ipfw_insn_ip *)cmd, av);
2484 if (cmd->opcode == O_IP_DST_SET) /* set */
2486 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2487 cmd->opcode = O_IP_DST_ME;
2488 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2489 cmd->opcode = O_IP_DST;
2490 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2491 cmd->opcode = O_IP_DST_MASK;
2496 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2498 if (!strncmp(av, "any", strlen(av))) {
2500 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2501 /* XXX todo: check that we have a protocol with ports */
2502 cmd->opcode = opcode;
2509 * Parse arguments and assemble the microinstructions which make up a rule.
2510 * Rules are added into the 'rulebuf' and then copied in the correct order
2511 * into the actual rule.
2513 * The syntax for a rule starts with the action, followed by an
2514 * optional log action, and the various match patterns.
2515 * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2516 * (generated if the rule includes a keep-state option), then the
2517 * various match patterns, the "log" action, and the actual action.
2521 add(int ac, char *av[])
2524 * rules are added into the 'rulebuf' and then copied in
2525 * the correct order into the actual rule.
2526 * Some things that need to go out of order (prob, action etc.)
2529 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255];
2531 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2532 ipfw_insn *first_cmd; /* first match pattern */
2537 * various flags used to record that we entered some fields.
2539 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2543 int open_par = 0; /* open parenthesis ( */
2545 /* proto is here because it is used to fetch ports */
2546 u_char proto = IPPROTO_IP; /* default protocol */
2548 double match_prob = 1; /* match probability, default is always match */
2550 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2551 bzero(cmdbuf, sizeof(cmdbuf));
2552 bzero(rulebuf, sizeof(rulebuf));
2554 rule = (struct ip_fw *)rulebuf;
2555 cmd = (ipfw_insn *)cmdbuf;
2556 action = (ipfw_insn *)actbuf;
2560 /* [rule N] -- Rule number optional */
2561 if (ac && isdigit(**av)) {
2562 rule->rulenum = atoi(*av);
2567 /* [set N] -- set number (0..30), optional */
2568 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2569 int set = strtoul(av[1], NULL, 10);
2570 if (set < 0 || set > 30)
2571 errx(EX_DATAERR, "illegal set %s", av[1]);
2576 /* [prob D] -- match probability, optional */
2577 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2578 match_prob = strtod(av[1], NULL);
2580 if (match_prob <= 0 || match_prob > 1)
2581 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2585 /* action -- mandatory */
2586 NEED1("missing action");
2587 i = match_token(rule_actions, *av);
2589 action->len = 1; /* default */
2591 case TOK_CHECKSTATE:
2592 have_state = action;
2593 action->opcode = O_CHECK_STATE;
2597 action->opcode = O_ACCEPT;
2601 action->opcode = O_DENY;
2606 action->opcode = O_REJECT;
2607 action->arg1 = ICMP_UNREACH_HOST;
2611 action->opcode = O_REJECT;
2612 action->arg1 = ICMP_REJECT_RST;
2616 action->opcode = O_REJECT;
2617 NEED1("missing reject code");
2618 fill_reject_code(&action->arg1, *av);
2623 action->opcode = O_COUNT;
2628 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2631 action->opcode = O_QUEUE;
2632 else if (i == TOK_PIPE)
2633 action->opcode = O_PIPE;
2634 else if (i == TOK_SKIPTO)
2635 action->opcode = O_SKIPTO;
2636 NEED1("missing skipto/pipe/queue number");
2637 action->arg1 = strtoul(*av, NULL, 10);
2643 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2644 NEED1("missing divert/tee port");
2645 action->arg1 = strtoul(*av, NULL, 0);
2646 if (action->arg1 == 0) {
2649 s = getservbyname(av[0], "divert");
2651 action->arg1 = ntohs(s->s_port);
2653 errx(EX_DATAERR, "illegal divert/tee port");
2659 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2662 NEED1("missing forward address[:port]");
2664 action->opcode = O_FORWARD_IP;
2665 action->len = F_INSN_SIZE(ipfw_insn_sa);
2667 p->sa.sin_len = sizeof(struct sockaddr_in);
2668 p->sa.sin_family = AF_INET;
2671 * locate the address-port separator (':' or ',')
2673 s = strchr(*av, ':');
2675 s = strchr(*av, ',');
2678 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2681 "illegal forwarding port ``%s''", s);
2682 p->sa.sin_port = (u_short)i;
2684 lookup_host(*av, &(p->sa.sin_addr));
2690 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2692 action = next_cmd(action);
2695 * [log [logamount N]] -- log, optional
2697 * If exists, it goes first in the cmdbuf, but then it is
2698 * skipped in the copy section to the end of the buffer.
2700 if (ac && !strncmp(*av, "log", strlen(*av))) {
2701 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2703 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2704 cmd->opcode = O_LOG;
2706 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2708 NEED1("logamount requires argument");
2709 c->max_log = atoi(*av);
2711 errx(EX_DATAERR, "logamount must be positive");
2714 cmd = next_cmd(cmd);
2717 if (have_state) /* must be a check-state, we are done */
2720 #define OR_START(target) \
2721 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
2723 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2726 if ( (av[0])[1] == '\0') { \
2737 !strncmp(*av, ")", strlen(*av)) || \
2738 !strncmp(*av, "}", strlen(*av)) )) { \
2743 errx(EX_USAGE, "missing \")\"\n"); \
2747 if (ac && !strncmp(*av, "not", strlen(*av))) { \
2748 if (cmd->len & F_NOT) \
2749 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2750 cmd->len |= F_NOT; \
2754 #define OR_BLOCK(target) \
2755 if (ac && !strncmp(*av, "or", strlen(*av))) { \
2756 if (prev == NULL || open_par == 0) \
2757 errx(EX_DATAERR, "invalid OR block"); \
2758 prev->len |= F_OR; \
2768 * MAC addresses, optional.
2769 * If we have this, we skip the part "proto from src to dst"
2770 * and jump straight to the option parsing.
2773 NEED1("missing protocol");
2774 if (!strncmp(*av, "MAC", strlen(*av)) ||
2775 !strncmp(*av, "mac", strlen(*av))) {
2776 ac--; av++; /* the "MAC" keyword */
2777 add_mac(cmd, ac, av); /* exits in case of errors */
2778 cmd = next_cmd(cmd);
2779 ac -= 2; av += 2; /* dst-mac and src-mac */
2781 NEED1("missing mac type");
2782 if (add_mactype(cmd, ac, av[0]))
2783 cmd = next_cmd(cmd);
2784 ac--; av++; /* any or mac-type */
2790 * protocol, mandatory
2792 OR_START(get_proto);
2794 NEED1("missing protocol");
2795 if (add_proto(cmd, *av)) {
2797 if (F_LEN(cmd) == 0) /* plain IP */
2802 cmd = next_cmd(cmd);
2804 } else if (first_cmd != cmd) {
2805 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2808 OR_BLOCK(get_proto);
2813 if (!ac || strncmp(*av, "from", strlen(*av)))
2814 errx(EX_USAGE, "missing ``from''");
2818 * source IP, mandatory
2820 OR_START(source_ip);
2821 NOT_BLOCK; /* optional "not" */
2822 NEED1("missing source address");
2823 if (add_srcip(cmd, *av)) {
2825 if (F_LEN(cmd) != 0) { /* ! any */
2827 cmd = next_cmd(cmd);
2830 OR_BLOCK(source_ip);
2833 * source ports, optional
2835 NOT_BLOCK; /* optional "not" */
2837 if (!strncmp(*av, "any", strlen(*av)) ||
2838 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2840 if (F_LEN(cmd) != 0)
2841 cmd = next_cmd(cmd);
2848 if (!ac || strncmp(*av, "to", strlen(*av)))
2849 errx(EX_USAGE, "missing ``to''");
2853 * destination, mandatory
2856 NOT_BLOCK; /* optional "not" */
2857 NEED1("missing dst address");
2858 if (add_dstip(cmd, *av)) {
2860 if (F_LEN(cmd) != 0) { /* ! any */
2862 cmd = next_cmd(cmd);
2868 * dest. ports, optional
2870 NOT_BLOCK; /* optional "not" */
2872 if (!strncmp(*av, "any", strlen(*av)) ||
2873 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
2875 if (F_LEN(cmd) != 0)
2876 cmd = next_cmd(cmd);
2881 if (ac && first_cmd == cmd) {
2883 * nothing specified so far, store in the rule to ease
2891 ipfw_insn_u32 *cmd32; /* alias for cmd */
2894 cmd32 = (ipfw_insn_u32 *)cmd;
2896 if (*s == '!') { /* alternate syntax for NOT */
2897 if (cmd->len & F_NOT)
2898 errx(EX_USAGE, "double \"not\" not allowed\n");
2902 i = match_token(rule_options, s);
2906 if (cmd->len & F_NOT)
2907 errx(EX_USAGE, "double \"not\" not allowed\n");
2912 if (open_par == 0 || prev == NULL)
2913 errx(EX_USAGE, "invalid \"or\" block\n");
2917 case TOK_STARTBRACE:
2919 errx(EX_USAGE, "+nested \"(\" not allowed\n");
2925 errx(EX_USAGE, "+missing \")\"\n");
2931 fill_cmd(cmd, O_IN, 0, 0);
2935 cmd->len ^= F_NOT; /* toggle F_NOT */
2936 fill_cmd(cmd, O_IN, 0, 0);
2940 fill_cmd(cmd, O_FRAG, 0, 0);
2944 fill_cmd(cmd, O_LAYER2, 0, 0);
2950 NEED1("recv, xmit, via require interface name"
2952 fill_iface((ipfw_insn_if *)cmd, av[0]);
2954 if (F_LEN(cmd) == 0) /* not a valid address */
2957 cmd->opcode = O_XMIT;
2958 else if (i == TOK_RECV)
2959 cmd->opcode = O_RECV;
2960 else if (i == TOK_VIA)
2961 cmd->opcode = O_VIA;
2965 NEED1("icmptypes requires list of types");
2966 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
2971 NEED1("ipttl requires TTL");
2972 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
2977 NEED1("ipid requires length");
2978 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
2983 NEED1("iplen requires length");
2984 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
2989 NEED1("ipver requires version");
2990 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
2994 case TOK_IPPRECEDENCE:
2995 NEED1("ipprecedence requires value");
2996 fill_cmd(cmd, O_IPPRECEDENCE, 0,
2997 (strtoul(*av, NULL, 0) & 7) << 5);
3002 NEED1("missing argument for ipoptions");
3003 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3008 NEED1("missing argument for iptos");
3009 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3014 NEED1("uid requires argument");
3020 cmd->opcode = O_UID;
3021 uid = strtoul(*av, &end, 0);
3022 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3024 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3025 cmd32->d[0] = pwd->pw_uid;
3026 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3032 NEED1("gid requires argument");
3038 cmd->opcode = O_GID;
3039 gid = strtoul(*av, &end, 0);
3040 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3042 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3043 cmd32->d[0] = grp->gr_gid;
3044 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3050 fill_cmd(cmd, O_ESTAB, 0, 0);
3054 fill_cmd(cmd, O_TCPFLAGS, 0,
3055 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3059 NEED1("missing argument for tcpoptions");
3060 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3066 NEED1("tcpseq/tcpack requires argument");
3067 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3068 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3069 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3074 NEED1("tcpwin requires length");
3075 fill_cmd(cmd, O_TCPWIN, 0,
3076 htons(strtoul(*av, NULL, 0)));
3081 NEED1("missing argument for tcpflags");
3082 cmd->opcode = O_TCPFLAGS;
3083 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3089 errx(EX_USAGE, "keep-state cannot be part "
3092 errx(EX_USAGE, "only one of keep-state "
3093 "and limit is allowed");
3095 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3100 errx(EX_USAGE, "limit cannot be part "
3103 errx(EX_USAGE, "only one of keep-state "
3104 "and limit is allowed");
3105 NEED1("limit needs mask and # of connections");
3108 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3110 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3111 cmd->opcode = O_LIMIT;
3117 val = match_token(limit_masks, *av);
3120 c->limit_mask |= val;
3123 c->conn_limit = atoi(*av);
3124 if (c->conn_limit == 0)
3125 errx(EX_USAGE, "limit: limit must be >0");
3126 if (c->limit_mask == 0)
3127 errx(EX_USAGE, "missing limit mask");
3133 NEED1("missing protocol");
3134 if (add_proto(cmd, *av)) {
3138 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3142 NEED1("missing source IP");
3143 if (add_srcip(cmd, *av)) {
3149 NEED1("missing destination IP");
3150 if (add_dstip(cmd, *av)) {
3156 NEED1("missing source port");
3157 if (!strncmp(*av, "any", strlen(*av)) ||
3158 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3161 errx(EX_DATAERR, "invalid source port %s", *av);
3165 NEED1("missing destination port");
3166 if (!strncmp(*av, "any", strlen(*av)) ||
3167 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3170 errx(EX_DATAERR, "invalid destination port %s",
3176 errx(EX_USAGE, "MAC dst-mac src-mac");
3177 if (add_mac(cmd, ac, av)) {
3183 NEED1("missing mac type");
3184 if (!add_mactype(cmd, ac, *av))
3185 errx(EX_DATAERR, "invalid mac type %s", *av);
3190 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3192 if (F_LEN(cmd) > 0) { /* prepare to advance */
3194 cmd = next_cmd(cmd);
3200 * Now copy stuff into the rule.
3201 * If we have a keep-state option, the first instruction
3202 * must be a PROBE_STATE (which is generated here).
3203 * If we have a LOG option, it was stored as the first command,
3204 * and now must be moved to the top of the action part.
3206 dst = (ipfw_insn *)rule->cmd;
3209 * First thing to write into the command stream is the match probability.
3211 if (match_prob != 1) { /* 1 means always match */
3212 dst->opcode = O_PROB;
3214 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3219 * generate O_PROBE_STATE if necessary
3221 if (have_state && have_state->opcode != O_CHECK_STATE) {
3222 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3223 dst = next_cmd(dst);
3226 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT
3228 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3231 switch (src->opcode) {
3237 bcopy(src, dst, i * sizeof(u_int32_t));
3243 * put back the have_state command as last opcode
3245 if (have_state && have_state->opcode != O_CHECK_STATE) {
3246 i = F_LEN(have_state);
3247 bcopy(have_state, dst, i * sizeof(u_int32_t));
3251 * start action section
3253 rule->act_ofs = dst - rule->cmd;
3256 * put back O_LOG if necessary
3258 src = (ipfw_insn *)cmdbuf;
3259 if ( src->opcode == O_LOG ) {
3261 bcopy(src, dst, i * sizeof(u_int32_t));
3265 * copy all other actions
3267 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3269 bcopy(src, dst, i * sizeof(u_int32_t));
3273 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3274 i = (void *)dst - (void *)rule;
3275 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3276 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3278 show_ipfw(rule, 10, 10);
3282 zero(int ac, char *av[])
3290 /* clear all entries */
3291 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3292 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3294 printf("Accounting cleared.\n");
3301 if (isdigit(**av)) {
3302 rulenum = atoi(*av);
3305 if (setsockopt(s, IPPROTO_IP,
3306 IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3307 warn("rule %u: setsockopt(IP_FW_ZERO)",
3309 failed = EX_UNAVAILABLE;
3310 } else if (!do_quiet)
3311 printf("Entry %d cleared\n", rulenum);
3313 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3316 if (failed != EX_OK)
3321 resetlog(int ac, char *av[])
3329 /* clear all entries */
3330 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3331 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3333 printf("Logging counts reset.\n");
3340 if (isdigit(**av)) {
3341 rulenum = atoi(*av);
3344 if (setsockopt(s, IPPROTO_IP,
3345 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3346 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3348 failed = EX_UNAVAILABLE;
3349 } else if (!do_quiet)
3350 printf("Entry %d logging count reset\n",
3353 errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3356 if (failed != EX_OK)
3363 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3365 if (!do_force && !do_quiet) { /* need to ask user */
3368 printf("Are you sure? [yn] ");
3371 c = toupper(getc(stdin));
3372 while (c != '\n' && getc(stdin) != '\n')
3374 return; /* and do not flush */
3375 } while (c != 'Y' && c != 'N');
3377 if (c == 'N') /* user said no */
3380 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3381 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3382 do_pipe ? "DUMMYNET" : "FW");
3384 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3388 ipfw_main(int ac, char **av)
3395 /* Set the force flag for non-interactive processes */
3396 do_force = !isatty(STDIN_FILENO);
3398 optind = optreset = 1;
3399 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3401 case 'h': /* help */
3403 break; /* NOTREACHED */
3405 case 's': /* sort */
3406 do_sort = atoi(optarg);
3435 case 'v': /* verbose */
3444 NEED1("bad arguments, for usage summary ``ipfw''");
3447 * optional: pipe or queue
3449 if (!strncmp(*av, "pipe", strlen(*av))) {
3453 } else if (!strncmp(*av, "queue", strlen(*av))) {
3458 NEED1("missing command");
3461 * for pipes and queues we normally say 'pipe NN config'
3462 * but the code is easier to parse as 'pipe config NN'
3463 * so we swap the two arguments.
3465 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') {
3470 if (!strncmp(*av, "add", strlen(*av)))
3472 else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
3473 config_pipe(ac, av);
3474 else if (!strncmp(*av, "delete", strlen(*av)))
3476 else if (!strncmp(*av, "flush", strlen(*av)))
3478 else if (!strncmp(*av, "zero", strlen(*av)))
3480 else if (!strncmp(*av, "resetlog", strlen(*av)))
3482 else if (!strncmp(*av, "print", strlen(*av)) ||
3483 !strncmp(*av, "list", strlen(*av)))
3485 else if (!strncmp(*av, "enable", strlen(*av)))
3486 sysctl_handler(ac, av, 1);
3487 else if (!strncmp(*av, "disable", strlen(*av)))
3488 sysctl_handler(ac, av, 0);
3489 else if (!strncmp(*av, "set", strlen(*av)))
3490 sets_handler(ac, av);
3491 else if (!strncmp(*av, "show", strlen(*av))) {
3495 errx(EX_USAGE, "bad command `%s'", *av);
3501 ipfw_readfile(int ac, char *av[])
3504 #define WHITESP " \t\f\v\n\r"
3506 char *a, *p, *args[MAX_ARGS], *cmd = NULL;
3508 int i=0, lineno=0, qflag=0, pflag=0, status;
3513 while ((c = getopt(ac, av, "D:U:p:q")) != -1)
3517 errx(EX_USAGE, "-D requires -p");
3518 if (i > MAX_ARGS - 2)
3520 "too many -D or -U options");
3527 errx(EX_USAGE, "-U requires -p");
3528 if (i > MAX_ARGS - 2)
3530 "too many -D or -U options");
3547 errx(EX_USAGE, "bad arguments, for usage"
3548 " summary ``ipfw''");
3554 errx(EX_USAGE, "extraneous filename arguments");
3556 if ((f = fopen(av[0], "r")) == NULL)
3557 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
3560 /* pipe through preprocessor (cpp or m4) */
3565 if (pipe(pipedes) == -1)
3566 err(EX_OSERR, "cannot create pipe");
3568 switch((preproc = fork())) {
3570 err(EX_OSERR, "cannot fork");
3574 if (dup2(fileno(f), 0) == -1
3575 || dup2(pipedes[1], 1) == -1)
3576 err(EX_OSERR, "dup2()");
3581 err(EX_OSERR, "execvp(%s) failed", cmd);
3587 if ((f = fdopen(pipedes[0], "r")) == NULL) {
3588 int savederrno = errno;
3590 kill(preproc, SIGTERM);
3592 err(EX_OSERR, "fdopen()");
3597 while (fgets(buf, BUFSIZ, f)) {
3599 sprintf(linename, "Line %d", lineno);
3604 if ((p = strchr(buf, '#')) != NULL)
3609 for (a = strtok(buf, WHITESP);
3610 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
3612 if (i == (qflag? 2: 1))
3615 errx(EX_USAGE, "%s: too many arguments",
3623 if (waitpid(preproc, &status, 0) == -1)
3624 errx(EX_OSERR, "waitpid()");
3625 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
3626 errx(EX_UNAVAILABLE,
3627 "preprocessor exited with status %d",
3628 WEXITSTATUS(status));
3629 else if (WIFSIGNALED(status))
3630 errx(EX_UNAVAILABLE,
3631 "preprocessor exited with signal %d",
3637 main(int ac, char *av[])
3639 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
3641 err(EX_UNAVAILABLE, "socket");
3644 * If the last argument is an absolute pathname, interpret it
3645 * as a file to be preprocessed.
3648 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
3649 ipfw_readfile(ac, av);