| 1 | /*- |
| 2 | * Copyright (c) 1980, 1992, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)netcmds.c 8.1 (Berkeley) 6/6/93 |
| 34 | * $FreeBSD: src/usr.bin/systat/netcmds.c,v 1.9 1999/08/28 01:06:04 peter Exp $ |
| 35 | * $DragonFly: src/usr.bin/systat/netcmds.c,v 1.7 2008/11/10 04:59:45 swildner Exp $ |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * Common network command support routines. |
| 40 | */ |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/queue.h> |
| 43 | #include <sys/socket.h> |
| 44 | #include <sys/socketvar.h> |
| 45 | #include <sys/protosw.h> |
| 46 | |
| 47 | #include <net/route.h> |
| 48 | #include <netinet/in.h> |
| 49 | #include <netinet/in_systm.h> |
| 50 | #include <netinet/ip.h> |
| 51 | #include <netinet/in_pcb.h> |
| 52 | #include <arpa/inet.h> |
| 53 | |
| 54 | #include <netdb.h> |
| 55 | #include <stdlib.h> |
| 56 | #include <string.h> |
| 57 | #include <ctype.h> |
| 58 | #include "systat.h" |
| 59 | #include "extern.h" |
| 60 | |
| 61 | #define streq(a,b) (strcmp(a,b)==0) |
| 62 | |
| 63 | static struct hitem { |
| 64 | struct in_addr addr; |
| 65 | int onoff; |
| 66 | } *hosts; |
| 67 | |
| 68 | int nports, nhosts, protos; |
| 69 | |
| 70 | static void changeitems(char *, int); |
| 71 | static int selectproto(char *); |
| 72 | static void showprotos(void); |
| 73 | static int selectport(long, int); |
| 74 | static void showports(void); |
| 75 | static int selecthost(struct in_addr *, int); |
| 76 | static void showhosts(void); |
| 77 | |
| 78 | int |
| 79 | netcmd(const char *cmd, char *args) |
| 80 | { |
| 81 | |
| 82 | if (prefix(cmd, "proto")) { |
| 83 | if (*args == '\0') { |
| 84 | move(CMDLINE, 0); |
| 85 | clrtoeol(); |
| 86 | addstr("which proto?"); |
| 87 | } else if (!selectproto(args)) { |
| 88 | error("%s: Unknown protocol.", args); |
| 89 | } |
| 90 | return (1); |
| 91 | } |
| 92 | if (prefix(cmd, "ignore") || prefix(cmd, "display")) { |
| 93 | changeitems(args, prefix(cmd, "display")); |
| 94 | return (1); |
| 95 | } |
| 96 | if (prefix(cmd, "reset")) { |
| 97 | selectproto(0); |
| 98 | selecthost(0, 0); |
| 99 | selectport(-1, 0); |
| 100 | return (1); |
| 101 | } |
| 102 | if (prefix(cmd, "show")) { |
| 103 | move(CMDLINE, 0); clrtoeol(); |
| 104 | if (*args == '\0') { |
| 105 | showprotos(); |
| 106 | showhosts(); |
| 107 | showports(); |
| 108 | return (1); |
| 109 | } |
| 110 | if (prefix(args, "protos")) |
| 111 | showprotos(); |
| 112 | else if (prefix(args, "hosts")) |
| 113 | showhosts(); |
| 114 | else if (prefix(args, "ports")) |
| 115 | showports(); |
| 116 | else |
| 117 | addstr("show what?"); |
| 118 | return (1); |
| 119 | } |
| 120 | return (0); |
| 121 | } |
| 122 | |
| 123 | |
| 124 | static void |
| 125 | changeitems(char *args, int onoff) |
| 126 | { |
| 127 | char *cp; |
| 128 | struct servent *sp; |
| 129 | struct hostent *hp; |
| 130 | struct in_addr in; |
| 131 | |
| 132 | cp = strchr(args, '\n'); |
| 133 | if (cp) |
| 134 | *cp = '\0'; |
| 135 | for (;;args = cp) { |
| 136 | for (cp = args; *cp && isspace(*cp); cp++) |
| 137 | ; |
| 138 | args = cp; |
| 139 | for (; *cp && !isspace(*cp); cp++) |
| 140 | ; |
| 141 | if (*cp) |
| 142 | *cp++ = '\0'; |
| 143 | if (cp - args == 0) |
| 144 | break; |
| 145 | sp = getservbyname(args, |
| 146 | protos == TCP ? "tcp" : protos == UDP ? "udp" : 0); |
| 147 | if (sp) { |
| 148 | selectport(sp->s_port, onoff); |
| 149 | continue; |
| 150 | } |
| 151 | hp = gethostbyname(args); |
| 152 | if (hp == 0) { |
| 153 | in.s_addr = inet_addr(args); |
| 154 | if ((int)in.s_addr == -1) { |
| 155 | error("%s: unknown host or port", args); |
| 156 | continue; |
| 157 | } |
| 158 | } else |
| 159 | in = *(struct in_addr *)hp->h_addr; |
| 160 | selecthost(&in, onoff); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | static int |
| 165 | selectproto(char *proto) |
| 166 | { |
| 167 | |
| 168 | if (proto == 0 || streq(proto, "all")) |
| 169 | protos = TCP | UDP; |
| 170 | else if (streq(proto, "tcp")) |
| 171 | protos = TCP; |
| 172 | else if (streq(proto, "udp")) |
| 173 | protos = UDP; |
| 174 | else |
| 175 | return (0); |
| 176 | |
| 177 | return (protos); |
| 178 | } |
| 179 | |
| 180 | static void |
| 181 | showprotos(void) |
| 182 | { |
| 183 | |
| 184 | if ((protos&TCP) == 0) |
| 185 | addch('!'); |
| 186 | addstr("tcp "); |
| 187 | if ((protos&UDP) == 0) |
| 188 | addch('!'); |
| 189 | addstr("udp "); |
| 190 | } |
| 191 | |
| 192 | static struct pitem { |
| 193 | long port; |
| 194 | int onoff; |
| 195 | } *ports; |
| 196 | |
| 197 | static int |
| 198 | selectport(long port, int onoff) |
| 199 | { |
| 200 | struct pitem *p; |
| 201 | |
| 202 | if (port == -1) { |
| 203 | if (ports == 0) |
| 204 | return (0); |
| 205 | free((char *)ports), ports = 0; |
| 206 | nports = 0; |
| 207 | return (1); |
| 208 | } |
| 209 | for (p = ports; p < ports+nports; p++) |
| 210 | if (p->port == port) { |
| 211 | p->onoff = onoff; |
| 212 | return (0); |
| 213 | } |
| 214 | if (nports == 0) |
| 215 | ports = (struct pitem *)malloc(sizeof (*p)); |
| 216 | else |
| 217 | ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p)); |
| 218 | p = &ports[nports++]; |
| 219 | p->port = port; |
| 220 | p->onoff = onoff; |
| 221 | return (1); |
| 222 | } |
| 223 | |
| 224 | int |
| 225 | checkport(struct inpcb *inp) |
| 226 | { |
| 227 | struct pitem *p; |
| 228 | |
| 229 | if (ports) |
| 230 | for (p = ports; p < ports+nports; p++) |
| 231 | if (p->port == inp->inp_lport || p->port == inp->inp_fport) |
| 232 | return (p->onoff); |
| 233 | return (1); |
| 234 | } |
| 235 | |
| 236 | static void |
| 237 | showports(void) |
| 238 | { |
| 239 | struct pitem *p; |
| 240 | struct servent *sp; |
| 241 | |
| 242 | for (p = ports; p < ports+nports; p++) { |
| 243 | sp = getservbyport(p->port, |
| 244 | protos == (TCP|UDP) ? 0 : protos == TCP ? "tcp" : "udp"); |
| 245 | if (!p->onoff) |
| 246 | addch('!'); |
| 247 | if (sp) |
| 248 | printw("%s ", sp->s_name); |
| 249 | else |
| 250 | printw("%d ", p->port); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | static int |
| 255 | selecthost(struct in_addr *in, int onoff) |
| 256 | { |
| 257 | struct hitem *p; |
| 258 | |
| 259 | if (in == 0) { |
| 260 | if (hosts == 0) |
| 261 | return (0); |
| 262 | free((char *)hosts), hosts = 0; |
| 263 | nhosts = 0; |
| 264 | return (1); |
| 265 | } |
| 266 | for (p = hosts; p < hosts+nhosts; p++) |
| 267 | if (p->addr.s_addr == in->s_addr) { |
| 268 | p->onoff = onoff; |
| 269 | return (0); |
| 270 | } |
| 271 | if (nhosts == 0) |
| 272 | hosts = (struct hitem *)malloc(sizeof (*p)); |
| 273 | else |
| 274 | hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p)); |
| 275 | p = &hosts[nhosts++]; |
| 276 | p->addr = *in; |
| 277 | p->onoff = onoff; |
| 278 | return (1); |
| 279 | } |
| 280 | |
| 281 | int |
| 282 | checkhost(struct inpcb *inp) |
| 283 | { |
| 284 | struct hitem *p; |
| 285 | |
| 286 | if (hosts) |
| 287 | for (p = hosts; p < hosts+nhosts; p++) |
| 288 | if (p->addr.s_addr == inp->inp_laddr.s_addr || |
| 289 | p->addr.s_addr == inp->inp_faddr.s_addr) |
| 290 | return (p->onoff); |
| 291 | return (1); |
| 292 | } |
| 293 | |
| 294 | static void |
| 295 | showhosts(void) |
| 296 | { |
| 297 | struct hitem *p; |
| 298 | struct hostent *hp; |
| 299 | |
| 300 | for (p = hosts; p < hosts+nhosts; p++) { |
| 301 | hp = gethostbyaddr(&p->addr, sizeof (p->addr), AF_INET); |
| 302 | if (!p->onoff) |
| 303 | addch('!'); |
| 304 | printw("%s ", hp ? hp->h_name : (char *)inet_ntoa(p->addr)); |
| 305 | } |
| 306 | } |