arp.c revision 1.15.2.3
1 1.15.2.3 is /* $NetBSD: arp.c,v 1.15.2.3 1997/03/10 20:26:06 is Exp $ */ 2 1.15.2.2 is 3 1.15.2.2 is /* 4 1.15.2.2 is * Copyright (c) 1984, 1993 5 1.15.2.2 is * The Regents of the University of California. All rights reserved. 6 1.15.2.2 is * 7 1.15.2.2 is * This code is derived from software contributed to Berkeley by 8 1.15.2.2 is * Sun Microsystems, Inc. 9 1.15.2.2 is * 10 1.15.2.2 is * Redistribution and use in source and binary forms, with or without 11 1.15.2.2 is * modification, are permitted provided that the following conditions 12 1.15.2.2 is * are met: 13 1.15.2.2 is * 1. Redistributions of source code must retain the above copyright 14 1.15.2.2 is * notice, this list of conditions and the following disclaimer. 15 1.15.2.2 is * 2. Redistributions in binary form must reproduce the above copyright 16 1.15.2.2 is * notice, this list of conditions and the following disclaimer in the 17 1.15.2.2 is * documentation and/or other materials provided with the distribution. 18 1.15.2.2 is * 3. All advertising materials mentioning features or use of this software 19 1.15.2.2 is * must display the following acknowledgement: 20 1.15.2.2 is * This product includes software developed by the University of 21 1.15.2.2 is * California, Berkeley and its contributors. 22 1.15.2.2 is * 4. Neither the name of the University nor the names of its contributors 23 1.15.2.2 is * may be used to endorse or promote products derived from this software 24 1.15.2.2 is * without specific prior written permission. 25 1.15.2.2 is * 26 1.15.2.2 is * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.15.2.2 is * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.15.2.2 is * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.15.2.2 is * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.15.2.2 is * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.15.2.2 is * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.15.2.2 is * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.15.2.2 is * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.15.2.2 is * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.15.2.2 is * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.15.2.2 is * SUCH DAMAGE. 37 1.15.2.2 is */ 38 1.15.2.2 is 39 1.15.2.2 is #ifndef lint 40 1.15.2.2 is static char copyright[] = 41 1.15.2.2 is "@(#) Copyright (c) 1984, 1993\n\ 42 1.15.2.2 is The Regents of the University of California. All rights reserved.\n"; 43 1.15.2.2 is #endif /* not lint */ 44 1.15.2.2 is 45 1.15.2.2 is #ifndef lint 46 1.15.2.2 is /*static char sccsid[] = "from: @(#)arp.c 8.2 (Berkeley) 1/2/94";*/ 47 1.15.2.3 is static char *rcsid = "$NetBSD: arp.c,v 1.15.2.3 1997/03/10 20:26:06 is Exp $"; 48 1.15.2.2 is #endif /* not lint */ 49 1.15.2.2 is 50 1.15.2.2 is /* 51 1.15.2.2 is * arp - display, set, and delete arp table entries 52 1.15.2.2 is */ 53 1.15.2.2 is 54 1.15.2.2 is #include <sys/param.h> 55 1.15.2.2 is #include <sys/file.h> 56 1.15.2.2 is #include <sys/socket.h> 57 1.15.2.2 is #include <sys/sysctl.h> 58 1.15.2.2 is 59 1.15.2.2 is #include <net/if.h> 60 1.15.2.2 is #include <net/if_dl.h> 61 1.15.2.2 is #include <net/if_ether.h> 62 1.15.2.2 is #include <net/if_types.h> 63 1.15.2.2 is #include <net/route.h> 64 1.15.2.2 is #include <netinet/in.h> 65 1.15.2.3 is #include <netinet/if_inarp.h> 66 1.15.2.2 is #include <arpa/inet.h> 67 1.15.2.2 is 68 1.15.2.2 is #include <err.h> 69 1.15.2.2 is #include <errno.h> 70 1.15.2.2 is #include <netdb.h> 71 1.15.2.2 is #include <nlist.h> 72 1.15.2.2 is #include <paths.h> 73 1.15.2.2 is #include <stdio.h> 74 1.15.2.2 is #include <stdlib.h> 75 1.15.2.2 is #include <string.h> 76 1.15.2.2 is #include <unistd.h> 77 1.15.2.2 is 78 1.15.2.2 is int delete __P((const char *, const char *)); 79 1.15.2.2 is void dump __P((u_long)); 80 1.15.2.2 is void sdl_print __P((const struct sockaddr_dl *)); 81 1.15.2.2 is int atosdl __P((const char *s, struct sockaddr_dl *sdl)); 82 1.15.2.2 is int file __P((char *)); 83 1.15.2.2 is void get __P((const char *)); 84 1.15.2.2 is int getinetaddr __P((const char *, struct in_addr *)); 85 1.15.2.2 is void getsocket __P((void)); 86 1.15.2.2 is int rtmsg __P((int)); 87 1.15.2.2 is int set __P((int, char **)); 88 1.15.2.2 is void usage __P((void)); 89 1.15.2.2 is 90 1.15.2.2 is static int pid; 91 1.15.2.2 is static int nflag; 92 1.15.2.2 is static int s = -1; 93 1.15.2.2 is 94 1.15.2.2 is int 95 1.15.2.2 is main(argc, argv) 96 1.15.2.2 is int argc; 97 1.15.2.2 is char **argv; 98 1.15.2.2 is { 99 1.15.2.2 is int ch; 100 1.15.2.2 is int op = 0; 101 1.15.2.2 is 102 1.15.2.2 is pid = getpid(); 103 1.15.2.2 is 104 1.15.2.2 is while ((ch = getopt(argc, argv, "andsf")) != -1) 105 1.15.2.2 is switch((char)ch) { 106 1.15.2.2 is case 'a': 107 1.15.2.2 is case 'd': 108 1.15.2.2 is case 's': 109 1.15.2.2 is case 'f': 110 1.15.2.2 is if (op) 111 1.15.2.2 is usage(); 112 1.15.2.2 is op = ch; 113 1.15.2.2 is break; 114 1.15.2.2 is case 'n': 115 1.15.2.2 is nflag = 1; 116 1.15.2.2 is break; 117 1.15.2.2 is default: 118 1.15.2.2 is usage(); 119 1.15.2.2 is } 120 1.15.2.2 is argc -= optind; 121 1.15.2.2 is argv += optind; 122 1.15.2.2 is 123 1.15.2.2 is switch((char)op) { 124 1.15.2.2 is case 'a': 125 1.15.2.2 is dump(0); 126 1.15.2.2 is break; 127 1.15.2.2 is case 'd': 128 1.15.2.2 is if (argc < 1 || argc > 2) 129 1.15.2.2 is usage(); 130 1.15.2.2 is (void)delete(argv[0], argv[1]); 131 1.15.2.2 is break; 132 1.15.2.2 is case 's': 133 1.15.2.2 is if (argc < 2 || argc > 5) 134 1.15.2.2 is usage(); 135 1.15.2.2 is return (set(argc, argv) ? 1 : 0); 136 1.15.2.2 is case 'f': 137 1.15.2.2 is if (argc != 1) 138 1.15.2.2 is usage(); 139 1.15.2.2 is return (file(argv[0])); 140 1.15.2.2 is default: 141 1.15.2.2 is if (argc != 1) 142 1.15.2.2 is usage(); 143 1.15.2.2 is get(argv[0]); 144 1.15.2.2 is break; 145 1.15.2.2 is } 146 1.15.2.2 is return (0); 147 1.15.2.2 is } 148 1.15.2.2 is 149 1.15.2.2 is /* 150 1.15.2.2 is * Process a file to set standard arp entries 151 1.15.2.2 is */ 152 1.15.2.2 is int 153 1.15.2.2 is file(name) 154 1.15.2.2 is char *name; 155 1.15.2.2 is { 156 1.15.2.2 is char line[100], arg[5][50], *args[5]; 157 1.15.2.2 is int i, retval; 158 1.15.2.2 is FILE *fp; 159 1.15.2.2 is 160 1.15.2.2 is if ((fp = fopen(name, "r")) == NULL) 161 1.15.2.2 is err(1, "cannot open %s", name); 162 1.15.2.2 is args[0] = &arg[0][0]; 163 1.15.2.2 is args[1] = &arg[1][0]; 164 1.15.2.2 is args[2] = &arg[2][0]; 165 1.15.2.2 is args[3] = &arg[3][0]; 166 1.15.2.2 is args[4] = &arg[4][0]; 167 1.15.2.2 is retval = 0; 168 1.15.2.2 is while (fgets(line, 100, fp) != NULL) { 169 1.15.2.2 is i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2], 170 1.15.2.2 is arg[3], arg[4]); 171 1.15.2.2 is if (i < 2) { 172 1.15.2.2 is warnx("bad line: %s", line); 173 1.15.2.2 is retval = 1; 174 1.15.2.2 is continue; 175 1.15.2.2 is } 176 1.15.2.2 is if (set(i, args)) 177 1.15.2.2 is retval = 1; 178 1.15.2.2 is } 179 1.15.2.2 is fclose(fp); 180 1.15.2.2 is return (retval); 181 1.15.2.2 is } 182 1.15.2.2 is 183 1.15.2.2 is void 184 1.15.2.2 is getsocket() 185 1.15.2.2 is { 186 1.15.2.2 is if (s >= 0) 187 1.15.2.2 is return; 188 1.15.2.2 is s = socket(PF_ROUTE, SOCK_RAW, 0); 189 1.15.2.2 is if (s < 0) 190 1.15.2.2 is err(1, "socket"); 191 1.15.2.2 is } 192 1.15.2.2 is 193 1.15.2.2 is struct sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}}; 194 1.15.2.2 is struct sockaddr_inarp blank_sin = {sizeof(blank_sin), AF_INET }, sin_m; 195 1.15.2.2 is struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; 196 1.15.2.2 is int expire_time, flags, export_only, doing_proxy, found_entry; 197 1.15.2.2 is struct { 198 1.15.2.2 is struct rt_msghdr m_rtm; 199 1.15.2.2 is char m_space[512]; 200 1.15.2.2 is } m_rtmsg; 201 1.15.2.2 is 202 1.15.2.2 is /* 203 1.15.2.2 is * Set an individual arp entry 204 1.15.2.2 is */ 205 1.15.2.2 is int 206 1.15.2.2 is set(argc, argv) 207 1.15.2.2 is int argc; 208 1.15.2.2 is char **argv; 209 1.15.2.2 is { 210 1.15.2.2 is register struct sockaddr_inarp *sin; 211 1.15.2.2 is register struct sockaddr_dl *sdl; 212 1.15.2.2 is register struct rt_msghdr *rtm; 213 1.15.2.2 is struct ether_addr *ea; 214 1.15.2.2 is char *host = argv[0], *eaddr; 215 1.15.2.2 is 216 1.15.2.2 is sin = &sin_m; 217 1.15.2.2 is rtm = &(m_rtmsg.m_rtm); 218 1.15.2.2 is eaddr = argv[1]; 219 1.15.2.2 is 220 1.15.2.2 is getsocket(); 221 1.15.2.2 is argc -= 2; 222 1.15.2.2 is argv += 2; 223 1.15.2.2 is sdl_m = blank_sdl; /* struct copy */ 224 1.15.2.2 is sin_m = blank_sin; /* struct copy */ 225 1.15.2.2 is if (getinetaddr(host, &sin->sin_addr) == -1) 226 1.15.2.2 is return (1); 227 1.15.2.2 is if (atosdl(eaddr, &sdl_m)) 228 1.15.2.2 is warnx("invalid link-level address '%s'", eaddr); 229 1.15.2.2 is doing_proxy = flags = export_only = expire_time = 0; 230 1.15.2.2 is while (argc-- > 0) { 231 1.15.2.2 is if (strncmp(argv[0], "temp", 4) == 0) { 232 1.15.2.2 is struct timeval time; 233 1.15.2.2 is (void)gettimeofday(&time, 0); 234 1.15.2.2 is expire_time = time.tv_sec + 20 * 60; 235 1.15.2.2 is } 236 1.15.2.2 is else if (strncmp(argv[0], "pub", 3) == 0) { 237 1.15.2.2 is flags |= RTF_ANNOUNCE; 238 1.15.2.2 is doing_proxy = SIN_PROXY; 239 1.15.2.2 is } else if (strncmp(argv[0], "trail", 5) == 0) { 240 1.15.2.2 is (void)printf( 241 1.15.2.2 is "%s: Sending trailers is no longer supported\n", 242 1.15.2.2 is host); 243 1.15.2.2 is } 244 1.15.2.2 is argv++; 245 1.15.2.2 is } 246 1.15.2.2 is tryagain: 247 1.15.2.2 is if (rtmsg(RTM_GET) < 0) { 248 1.15.2.2 is warn("%s", host); 249 1.15.2.2 is return (1); 250 1.15.2.2 is } 251 1.15.2.2 is sin = (struct sockaddr_inarp *)(rtm + 1); 252 1.15.2.2 is sdl = (struct sockaddr_dl *)(sin->sin_len + (char *)sin); 253 1.15.2.2 is if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) { 254 1.15.2.2 is if (sdl->sdl_family == AF_LINK && 255 1.15.2.2 is (rtm->rtm_flags & RTF_LLINFO) && 256 1.15.2.2 is !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { 257 1.15.2.2 is case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 258 1.15.2.2 is case IFT_ISO88024: case IFT_ISO88025: 259 1.15.2.2 is goto overwrite; 260 1.15.2.2 is } 261 1.15.2.2 is if (doing_proxy == 0) { 262 1.15.2.2 is (void)printf("set: can only proxy for %s\n", host); 263 1.15.2.2 is return (1); 264 1.15.2.2 is } 265 1.15.2.2 is if (sin_m.sin_other & SIN_PROXY) { 266 1.15.2.2 is (void)printf( 267 1.15.2.2 is "set: proxy entry exists for non 802 device\n"); 268 1.15.2.2 is return (1); 269 1.15.2.2 is } 270 1.15.2.2 is sin_m.sin_other = SIN_PROXY; 271 1.15.2.2 is export_only = 1; 272 1.15.2.2 is goto tryagain; 273 1.15.2.2 is } 274 1.15.2.2 is overwrite: 275 1.15.2.2 is if (sdl->sdl_family != AF_LINK) { 276 1.15.2.2 is (void)printf("cannot intuit interface index and type for %s\n", 277 1.15.2.2 is host); 278 1.15.2.2 is return (1); 279 1.15.2.2 is } 280 1.15.2.2 is sdl_m.sdl_type = sdl->sdl_type; 281 1.15.2.2 is sdl_m.sdl_index = sdl->sdl_index; 282 1.15.2.2 is return (rtmsg(RTM_ADD)); 283 1.15.2.2 is } 284 1.15.2.2 is 285 1.15.2.2 is /* 286 1.15.2.2 is * Display an individual arp entry 287 1.15.2.2 is */ 288 1.15.2.2 is void 289 1.15.2.2 is get(host) 290 1.15.2.2 is const char *host; 291 1.15.2.2 is { 292 1.15.2.2 is struct sockaddr_inarp *sin; 293 1.15.2.2 is 294 1.15.2.2 is sin = &sin_m; 295 1.15.2.2 is sin_m = blank_sin; /* struct copy */ 296 1.15.2.2 is if (getinetaddr(host, &sin->sin_addr) == -1) 297 1.15.2.2 is exit(1); 298 1.15.2.2 is dump(sin->sin_addr.s_addr); 299 1.15.2.2 is if (found_entry == 0) { 300 1.15.2.2 is (void)printf("%s (%s) -- no entry\n", host, 301 1.15.2.2 is inet_ntoa(sin->sin_addr)); 302 1.15.2.2 is exit(1); 303 1.15.2.2 is } 304 1.15.2.2 is } 305 1.15.2.2 is 306 1.15.2.2 is /* 307 1.15.2.2 is * Delete an arp entry 308 1.15.2.2 is */ 309 1.15.2.2 is int 310 1.15.2.2 is delete(host, info) 311 1.15.2.2 is const char *host; 312 1.15.2.2 is const char *info; 313 1.15.2.2 is { 314 1.15.2.2 is register struct sockaddr_inarp *sin; 315 1.15.2.2 is register struct rt_msghdr *rtm; 316 1.15.2.2 is struct sockaddr_dl *sdl; 317 1.15.2.2 is 318 1.15.2.2 is sin = &sin_m; 319 1.15.2.2 is rtm = &m_rtmsg.m_rtm; 320 1.15.2.2 is 321 1.15.2.2 is if (info && strncmp(info, "pro", 3) ) 322 1.15.2.2 is export_only = 1; 323 1.15.2.2 is getsocket(); 324 1.15.2.2 is sin_m = blank_sin; /* struct copy */ 325 1.15.2.2 is if (getinetaddr(host, &sin->sin_addr) == -1) 326 1.15.2.2 is return (1); 327 1.15.2.2 is tryagain: 328 1.15.2.2 is if (rtmsg(RTM_GET) < 0) { 329 1.15.2.2 is warn("%s", host); 330 1.15.2.2 is return (1); 331 1.15.2.2 is } 332 1.15.2.2 is sin = (struct sockaddr_inarp *)(rtm + 1); 333 1.15.2.2 is sdl = (struct sockaddr_dl *)(sin->sin_len + (char *)sin); 334 1.15.2.2 is if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) { 335 1.15.2.2 is if (sdl->sdl_family == AF_LINK && 336 1.15.2.2 is (rtm->rtm_flags & RTF_LLINFO) && 337 1.15.2.2 is !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { 338 1.15.2.2 is case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: 339 1.15.2.2 is case IFT_ISO88024: case IFT_ISO88025: 340 1.15.2.2 is goto delete; 341 1.15.2.2 is } 342 1.15.2.2 is } 343 1.15.2.2 is if (sin_m.sin_other & SIN_PROXY) { 344 1.15.2.2 is warnx("delete: can't locate %s", host); 345 1.15.2.2 is return (1); 346 1.15.2.2 is } else { 347 1.15.2.2 is sin_m.sin_other = SIN_PROXY; 348 1.15.2.2 is goto tryagain; 349 1.15.2.2 is } 350 1.15.2.2 is delete: 351 1.15.2.2 is if (sdl->sdl_family != AF_LINK) { 352 1.15.2.2 is (void)printf("cannot locate %s\n", host); 353 1.15.2.2 is return (1); 354 1.15.2.2 is } 355 1.15.2.2 is if (rtmsg(RTM_DELETE)) 356 1.15.2.2 is return (1); 357 1.15.2.2 is (void)printf("%s (%s) deleted\n", host, inet_ntoa(sin->sin_addr)); 358 1.15.2.2 is return (0); 359 1.15.2.2 is } 360 1.15.2.2 is 361 1.15.2.2 is /* 362 1.15.2.2 is * Dump the entire arp table 363 1.15.2.2 is */ 364 1.15.2.2 is void 365 1.15.2.2 is dump(addr) 366 1.15.2.2 is u_long addr; 367 1.15.2.2 is { 368 1.15.2.2 is int mib[6]; 369 1.15.2.2 is size_t needed; 370 1.15.2.2 is char *host, *lim, *buf, *next; 371 1.15.2.2 is struct rt_msghdr *rtm; 372 1.15.2.2 is struct sockaddr_inarp *sin; 373 1.15.2.2 is struct sockaddr_dl *sdl; 374 1.15.2.2 is extern int h_errno; 375 1.15.2.2 is struct hostent *hp; 376 1.15.2.2 is 377 1.15.2.2 is mib[0] = CTL_NET; 378 1.15.2.2 is mib[1] = PF_ROUTE; 379 1.15.2.2 is mib[2] = 0; 380 1.15.2.2 is mib[3] = AF_INET; 381 1.15.2.2 is mib[4] = NET_RT_FLAGS; 382 1.15.2.2 is mib[5] = RTF_LLINFO; 383 1.15.2.2 is if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 384 1.15.2.2 is err(1, "route-sysctl-estimate"); 385 1.15.2.2 is if ((buf = malloc(needed)) == NULL) 386 1.15.2.2 is err(1, "malloc"); 387 1.15.2.2 is if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 388 1.15.2.2 is err(1, "actual retrieval of routing table"); 389 1.15.2.2 is lim = buf + needed; 390 1.15.2.2 is for (next = buf; next < lim; next += rtm->rtm_msglen) { 391 1.15.2.2 is rtm = (struct rt_msghdr *)next; 392 1.15.2.2 is sin = (struct sockaddr_inarp *)(rtm + 1); 393 1.15.2.2 is sdl = (struct sockaddr_dl *)(sin + 1); 394 1.15.2.2 is if (addr) { 395 1.15.2.2 is if (addr != sin->sin_addr.s_addr) 396 1.15.2.2 is continue; 397 1.15.2.2 is found_entry = 1; 398 1.15.2.2 is } 399 1.15.2.2 is if (nflag == 0) 400 1.15.2.2 is hp = gethostbyaddr((caddr_t)&(sin->sin_addr), 401 1.15.2.2 is sizeof sin->sin_addr, AF_INET); 402 1.15.2.2 is else 403 1.15.2.2 is hp = 0; 404 1.15.2.2 is if (hp) 405 1.15.2.2 is host = hp->h_name; 406 1.15.2.2 is else { 407 1.15.2.2 is host = "?"; 408 1.15.2.2 is if (h_errno == TRY_AGAIN) 409 1.15.2.2 is nflag = 1; 410 1.15.2.2 is } 411 1.15.2.2 is (void)printf("%s (%s) at ", host, inet_ntoa(sin->sin_addr)); 412 1.15.2.2 is if (sdl->sdl_alen) 413 1.15.2.2 is sdl_print(sdl); 414 1.15.2.2 is else 415 1.15.2.2 is (void)printf("(incomplete)"); 416 1.15.2.2 is if (rtm->rtm_rmx.rmx_expire == 0) 417 1.15.2.2 is (void)printf(" permanent"); 418 1.15.2.2 is if (sin->sin_other & SIN_PROXY) 419 1.15.2.2 is (void)printf(" published (proxy only)"); 420 1.15.2.2 is if (rtm->rtm_addrs & RTA_NETMASK) { 421 1.15.2.2 is sin = (struct sockaddr_inarp *) 422 1.15.2.2 is (sdl->sdl_len + (char *)sdl); 423 1.15.2.2 is if (sin->sin_addr.s_addr == 0xffffffff) 424 1.15.2.2 is (void)printf(" published"); 425 1.15.2.2 is if (sin->sin_len != 8) 426 1.15.2.2 is (void)printf("(wierd)"); 427 1.15.2.2 is } 428 1.15.2.2 is (void)printf("\n"); 429 1.15.2.2 is } 430 1.15.2.2 is } 431 1.15.2.2 is 432 1.15.2.2 is void 433 1.15.2.2 is sdl_print(sdl) 434 1.15.2.2 is const struct sockaddr_dl *sdl; 435 1.15.2.2 is { 436 1.15.2.2 is int i; 437 1.15.2.2 is u_int8_t *p; 438 1.15.2.2 is 439 1.15.2.2 is i = sdl->sdl_alen; 440 1.15.2.2 is p = LLADDR(sdl); 441 1.15.2.2 is 442 1.15.2.2 is (void)printf("%x", *p); 443 1.15.2.2 is while (--i > 0) 444 1.15.2.2 is (void)printf(":%x", *++p); 445 1.15.2.2 is } 446 1.15.2.2 is 447 1.15.2.2 is int 448 1.15.2.2 is atosdl(s, sdl) 449 1.15.2.2 is const char *s; 450 1.15.2.2 is struct sockaddr_dl *sdl; 451 1.15.2.2 is { 452 1.15.2.2 is int i; 453 1.15.2.2 is long b; 454 1.15.2.2 is caddr_t endp; 455 1.15.2.2 is caddr_t p; 456 1.15.2.2 is char *t, *r; 457 1.15.2.2 is 458 1.15.2.2 is p = LLADDR(sdl); 459 1.15.2.2 is endp = ((caddr_t)sdl) + sdl->sdl_len; 460 1.15.2.2 is i = 0; 461 1.15.2.2 is 462 1.15.2.2 is b = strtol(s, &t, 16); 463 1.15.2.2 is if (t == s) 464 1.15.2.2 is return 1; 465 1.15.2.2 is 466 1.15.2.2 is *p++ = b; 467 1.15.2.2 is ++i; 468 1.15.2.2 is while ((p < endp) && (*t++ == ':')) { 469 1.15.2.2 is b = strtol(t, &r, 16); 470 1.15.2.2 is if (r == t) 471 1.15.2.2 is break; 472 1.15.2.2 is *p++ = b; 473 1.15.2.2 is ++i; 474 1.15.2.2 is t = r; 475 1.15.2.2 is } 476 1.15.2.2 is sdl->sdl_alen = i; 477 1.15.2.2 is 478 1.15.2.2 is return 0; 479 1.15.2.2 is } 480 1.15.2.2 is 481 1.15.2.2 is void 482 1.15.2.2 is usage() 483 1.15.2.2 is { 484 1.15.2.2 is (void)fprintf(stderr, "usage: arp [-n] hostname\n"); 485 1.15.2.2 is (void)fprintf(stderr, "usage: arp [-n] -a\n"); 486 1.15.2.2 is (void)fprintf(stderr, "usage: arp -d hostname\n"); 487 1.15.2.2 is (void)fprintf(stderr, 488 1.15.2.2 is "usage: arp -s hostname ether_addr [temp] [pub]\n"); 489 1.15.2.2 is (void)fprintf(stderr, "usage: arp -f filename\n"); 490 1.15.2.2 is exit(1); 491 1.15.2.2 is } 492 1.15.2.2 is 493 1.15.2.2 is int 494 1.15.2.2 is rtmsg(cmd) 495 1.15.2.2 is int cmd; 496 1.15.2.2 is { 497 1.15.2.2 is static int seq; 498 1.15.2.2 is int rlen; 499 1.15.2.2 is register struct rt_msghdr *rtm; 500 1.15.2.2 is register char *cp; 501 1.15.2.2 is register int l; 502 1.15.2.2 is 503 1.15.2.2 is rtm = &m_rtmsg.m_rtm; 504 1.15.2.2 is cp = m_rtmsg.m_space; 505 1.15.2.2 is errno = 0; 506 1.15.2.2 is 507 1.15.2.2 is if (cmd == RTM_DELETE) 508 1.15.2.2 is goto doit; 509 1.15.2.2 is (void)memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 510 1.15.2.2 is rtm->rtm_flags = flags; 511 1.15.2.2 is rtm->rtm_version = RTM_VERSION; 512 1.15.2.2 is 513 1.15.2.2 is switch (cmd) { 514 1.15.2.2 is default: 515 1.15.2.2 is errx(1, "internal wrong cmd"); 516 1.15.2.2 is /*NOTREACHED*/ 517 1.15.2.2 is case RTM_ADD: 518 1.15.2.2 is rtm->rtm_addrs |= RTA_GATEWAY; 519 1.15.2.2 is rtm->rtm_rmx.rmx_expire = expire_time; 520 1.15.2.2 is rtm->rtm_inits = RTV_EXPIRE; 521 1.15.2.2 is rtm->rtm_flags |= (RTF_HOST | RTF_STATIC); 522 1.15.2.2 is sin_m.sin_other = 0; 523 1.15.2.2 is if (doing_proxy) { 524 1.15.2.2 is if (export_only) 525 1.15.2.2 is sin_m.sin_other = SIN_PROXY; 526 1.15.2.2 is else { 527 1.15.2.2 is rtm->rtm_addrs |= RTA_NETMASK; 528 1.15.2.2 is rtm->rtm_flags &= ~RTF_HOST; 529 1.15.2.2 is } 530 1.15.2.2 is } 531 1.15.2.2 is /* FALLTHROUGH */ 532 1.15.2.2 is case RTM_GET: 533 1.15.2.2 is rtm->rtm_addrs |= RTA_DST; 534 1.15.2.2 is } 535 1.15.2.2 is #define NEXTADDR(w, s) \ 536 1.15.2.2 is if (rtm->rtm_addrs & (w)) { \ 537 1.15.2.2 is (void)memcpy(cp, &s, sizeof(s)); cp += sizeof(s);} 538 1.15.2.2 is 539 1.15.2.2 is NEXTADDR(RTA_DST, sin_m); 540 1.15.2.2 is NEXTADDR(RTA_GATEWAY, sdl_m); 541 1.15.2.2 is NEXTADDR(RTA_NETMASK, so_mask); 542 1.15.2.2 is 543 1.15.2.2 is rtm->rtm_msglen = cp - (char *)&m_rtmsg; 544 1.15.2.2 is doit: 545 1.15.2.2 is l = rtm->rtm_msglen; 546 1.15.2.2 is rtm->rtm_seq = ++seq; 547 1.15.2.2 is rtm->rtm_type = cmd; 548 1.15.2.2 is if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 549 1.15.2.2 is if (errno != ESRCH || cmd != RTM_DELETE) { 550 1.15.2.2 is warn("writing to routing socket"); 551 1.15.2.2 is return (-1); 552 1.15.2.2 is } 553 1.15.2.2 is } 554 1.15.2.2 is do { 555 1.15.2.2 is l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 556 1.15.2.2 is } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); 557 1.15.2.2 is if (l < 0) 558 1.15.2.2 is warn("read from routing socket"); 559 1.15.2.2 is return (0); 560 1.15.2.2 is } 561 1.15.2.2 is 562 1.15.2.2 is int 563 1.15.2.2 is getinetaddr(host, inap) 564 1.15.2.2 is const char *host; 565 1.15.2.2 is struct in_addr *inap; 566 1.15.2.2 is { 567 1.15.2.2 is struct hostent *hp; 568 1.15.2.2 is 569 1.15.2.2 is if (inet_aton(host, inap) == 1) 570 1.15.2.2 is return (0); 571 1.15.2.2 is if ((hp = gethostbyname(host)) == NULL) { 572 1.15.2.2 is warnx("%s: %s\n", host, hstrerror(h_errno)); 573 1.15.2.2 is return (-1); 574 1.15.2.2 is } 575 1.15.2.2 is (void)memcpy(inap, hp->h_addr, sizeof(*inap)); 576 1.15.2.2 is return (0); 577 1.15.2.2 is } 578
Indexes created Tue Sep 30 20:09:53 GMT 2025