if.c revision 1.19
1 /* $NetBSD: if.c,v 1.19 1996/06/07 21:43:26 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94"; 39 #else 40 static char *rcsid = "$NetBSD: if.c,v 1.19 1996/06/07 21:43:26 thorpej Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/protosw.h> 46 #include <sys/socket.h> 47 48 #include <net/if.h> 49 #include <net/if_dl.h> 50 #include <netinet/in.h> 51 #include <netinet/in_var.h> 52 #include <netns/ns.h> 53 #include <netns/ns_if.h> 54 #include <netiso/iso.h> 55 #include <netiso/iso_var.h> 56 #include <arpa/inet.h> 57 58 #include <signal.h> 59 #include <stdio.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include "netstat.h" 64 65 #define YES 1 66 #define NO 0 67 68 static void sidewaysintpr __P((u_int, u_long)); 69 static void catchalarm __P((int)); 70 71 /* 72 * Print a description of the network interfaces. 73 * NOTE: ifnetaddr is the location of the kernel global "ifnet", 74 * which is a TAILQ_HEAD. 75 */ 76 void 77 intpr(interval, ifnetaddr) 78 int interval; 79 u_long ifnetaddr; 80 { 81 struct ifnet ifnet; 82 union { 83 struct ifaddr ifa; 84 struct in_ifaddr in; 85 struct ns_ifaddr ns; 86 struct iso_ifaddr iso; 87 } ifaddr; 88 u_long ifaddraddr; 89 struct sockaddr *sa; 90 struct ifnet_head ifhead; /* TAILQ_HEAD */ 91 char name[IFNAMSIZ]; 92 93 if (ifnetaddr == 0) { 94 printf("ifnet: symbol not defined\n"); 95 return; 96 } 97 if (interval) { 98 sidewaysintpr((unsigned)interval, ifnetaddr); 99 return; 100 } 101 102 /* 103 * Find the pointer to the first ifnet structure. Replace 104 * the pointer to the TAILQ_HEAD with the actual pointer 105 * to the first list element. 106 */ 107 if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead)) 108 return; 109 ifnetaddr = (u_long)ifhead.tqh_first; 110 111 printf("%-5.5s %-5.5s %-11.11s %-17.17s %8.8s %5.5s %8.8s %5.5s", 112 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 113 "Opkts", "Oerrs"); 114 printf(" %5s", "Coll"); 115 if (tflag) 116 printf(" %s", "Time"); 117 if (dflag) 118 printf(" %s", "Drop"); 119 putchar('\n'); 120 ifaddraddr = 0; 121 while (ifnetaddr || ifaddraddr) { 122 struct sockaddr_in *sin; 123 register char *cp; 124 int n, m; 125 126 if (ifaddraddr == 0) { 127 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 128 return; 129 bcopy(ifnet.if_xname, name, IFNAMSIZ); 130 name[IFNAMSIZ - 1] = '\0'; /* sanity */ 131 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 132 if (interface != 0 && strcmp(name, interface) != 0) 133 continue; 134 cp = index(name, '\0'); 135 if ((ifnet.if_flags & IFF_UP) == 0) 136 *cp++ = '*'; 137 *cp = '\0'; 138 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 139 } 140 printf("%-5.5s %-5d ", name, ifnet.if_mtu); 141 if (ifaddraddr == 0) { 142 printf("%-11.11s ", "none"); 143 printf("%-15.15s ", "none"); 144 } else { 145 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 146 ifaddraddr = 0; 147 continue; 148 } 149 #define CP(x) ((char *)(x)) 150 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 151 CP(&ifaddr); sa = (struct sockaddr *)cp; 152 switch (sa->sa_family) { 153 case AF_UNSPEC: 154 printf("%-11.11s ", "none"); 155 printf("%-17.17s ", "none"); 156 break; 157 case AF_INET: 158 sin = (struct sockaddr_in *)sa; 159 #ifdef notdef 160 /* can't use inet_makeaddr because kernel 161 * keeps nets unshifted. 162 */ 163 in = inet_makeaddr(ifaddr.in.ia_subnet, 164 INADDR_ANY); 165 printf("%-11.11s ", netname(in.s_addr, 166 ifaddr.in.ia_subnetmask)); 167 #else 168 printf("%-11.11s ", 169 netname(ifaddr.in.ia_subnet, 170 ifaddr.in.ia_subnetmask)); 171 #endif 172 printf("%-17.17s ", 173 routename(sin->sin_addr.s_addr)); 174 175 if (aflag) { 176 u_long multiaddr; 177 struct in_multi inm; 178 179 multiaddr = (u_long)ifaddr.in.ia_multiaddrs.lh_first; 180 while (multiaddr != 0) { 181 kread(multiaddr, (char *)&inm, 182 sizeof inm); 183 printf("\n%23s %-15.15s ", "", 184 routename(inm.inm_addr.s_addr)); 185 multiaddr = (u_long)inm.inm_list.le_next; 186 } 187 } 188 break; 189 case AF_NS: 190 { 191 struct sockaddr_ns *sns = 192 (struct sockaddr_ns *)sa; 193 u_long net; 194 char netnum[8]; 195 196 *(union ns_net *) &net = sns->sns_addr.x_net; 197 sprintf(netnum, "%lxH", ntohl(net)); 198 upHex(netnum); 199 printf("ns:%-8s ", netnum); 200 printf("%-17s ", 201 ns_phost((struct sockaddr *)sns)); 202 } 203 break; 204 case AF_LINK: 205 { 206 struct sockaddr_dl *sdl = 207 (struct sockaddr_dl *)sa; 208 cp = (char *)LLADDR(sdl); 209 n = sdl->sdl_alen; 210 } 211 m = printf("%-11.11s ", "<Link>"); 212 goto hexprint; 213 default: 214 m = printf("(%d)", sa->sa_family); 215 for (cp = sa->sa_len + (char *)sa; 216 --cp > sa->sa_data && (*cp == 0);) {} 217 n = cp - sa->sa_data + 1; 218 cp = sa->sa_data; 219 hexprint: 220 while (--n >= 0) 221 m += printf("%x%c", *cp++ & 0xff, 222 n > 0 ? '.' : ' '); 223 m = 30 - m; 224 while (m-- > 0) 225 putchar(' '); 226 break; 227 } 228 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 229 } 230 printf("%8d %5d %8d %5d %5d", 231 ifnet.if_ipackets, ifnet.if_ierrors, 232 ifnet.if_opackets, ifnet.if_oerrors, 233 ifnet.if_collisions); 234 if (tflag) 235 printf(" %3d", ifnet.if_timer); 236 if (dflag) 237 printf(" %3d", ifnet.if_snd.ifq_drops); 238 putchar('\n'); 239 } 240 } 241 242 #define MAXIF 100 243 struct iftot { 244 char ift_name[IFNAMSIZ]; /* interface name */ 245 int ift_ip; /* input packets */ 246 int ift_ie; /* input errors */ 247 int ift_op; /* output packets */ 248 int ift_oe; /* output errors */ 249 int ift_co; /* collisions */ 250 int ift_dr; /* drops */ 251 } iftot[MAXIF]; 252 253 u_char signalled; /* set if alarm goes off "early" */ 254 255 /* 256 * Print a running summary of interface statistics. 257 * Repeat display every interval seconds, showing statistics 258 * collected over that interval. Assumes that interval is non-zero. 259 * First line printed at top of screen is always cumulative. 260 */ 261 static void 262 sidewaysintpr(interval, off) 263 unsigned interval; 264 u_long off; 265 { 266 struct ifnet ifnet; 267 u_long firstifnet; 268 register struct iftot *ip, *total; 269 register int line; 270 struct iftot *lastif, *sum, *interesting; 271 struct ifnet_head ifhead; /* TAILQ_HEAD */ 272 int oldmask; 273 274 /* 275 * Find the pointer to the first ifnet structure. Replace 276 * the pointer to the TAILQ_HEAD with the actual pointer 277 * to the first list element. 278 */ 279 if (kread(off, (char *)&ifhead, sizeof ifhead)) 280 return; 281 firstifnet = (u_long)ifhead.tqh_first; 282 283 lastif = iftot; 284 sum = iftot + MAXIF - 1; 285 total = sum - 1; 286 interesting = (interface == NULL) ? iftot : NULL; 287 for (off = firstifnet, ip = iftot; off;) { 288 if (kread(off, (char *)&ifnet, sizeof ifnet)) 289 break; 290 bzero(ip->ift_name, sizeof(ip->ift_name)); 291 snprintf(ip->ift_name, IFNAMSIZ, "(%s)", ifnet.if_xname); 292 if (interface && strcmp(ifnet.if_xname, interface) == 0) 293 interesting = ip; 294 ip++; 295 if (ip >= iftot + MAXIF - 2) 296 break; 297 off = (u_long)ifnet.if_list.tqe_next; 298 } 299 if (interesting == NULL) { 300 fprintf(stderr, "%s: %s: unknown interface\n", 301 __progname, interface); 302 exit(1); 303 } 304 lastif = ip; 305 306 (void)signal(SIGALRM, catchalarm); 307 signalled = NO; 308 (void)alarm(interval); 309 banner: 310 printf(" input %-6.6s output ", interesting->ift_name); 311 if (lastif - iftot > 0) { 312 if (dflag) 313 printf(" "); 314 printf(" input (Total) output"); 315 } 316 for (ip = iftot; ip < iftot + MAXIF; ip++) { 317 ip->ift_ip = 0; 318 ip->ift_ie = 0; 319 ip->ift_op = 0; 320 ip->ift_oe = 0; 321 ip->ift_co = 0; 322 ip->ift_dr = 0; 323 } 324 putchar('\n'); 325 printf("%8.8s %5.5s %8.8s %5.5s %5.5s ", 326 "packets", "errs", "packets", "errs", "colls"); 327 if (dflag) 328 printf("%5.5s ", "drops"); 329 if (lastif - iftot > 0) 330 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 331 "packets", "errs", "packets", "errs", "colls"); 332 if (dflag) 333 printf(" %5.5s", "drops"); 334 putchar('\n'); 335 fflush(stdout); 336 line = 0; 337 loop: 338 sum->ift_ip = 0; 339 sum->ift_ie = 0; 340 sum->ift_op = 0; 341 sum->ift_oe = 0; 342 sum->ift_co = 0; 343 sum->ift_dr = 0; 344 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 345 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 346 off = 0; 347 continue; 348 } 349 if (ip == interesting) { 350 printf("%8d %5d %8d %5d %5d", 351 ifnet.if_ipackets - ip->ift_ip, 352 ifnet.if_ierrors - ip->ift_ie, 353 ifnet.if_opackets - ip->ift_op, 354 ifnet.if_oerrors - ip->ift_oe, 355 ifnet.if_collisions - ip->ift_co); 356 if (dflag) 357 printf(" %5d", 358 ifnet.if_snd.ifq_drops - ip->ift_dr); 359 } 360 ip->ift_ip = ifnet.if_ipackets; 361 ip->ift_ie = ifnet.if_ierrors; 362 ip->ift_op = ifnet.if_opackets; 363 ip->ift_oe = ifnet.if_oerrors; 364 ip->ift_co = ifnet.if_collisions; 365 ip->ift_dr = ifnet.if_snd.ifq_drops; 366 sum->ift_ip += ip->ift_ip; 367 sum->ift_ie += ip->ift_ie; 368 sum->ift_op += ip->ift_op; 369 sum->ift_oe += ip->ift_oe; 370 sum->ift_co += ip->ift_co; 371 sum->ift_dr += ip->ift_dr; 372 off = (u_long)ifnet.if_list.tqe_next; 373 } 374 if (lastif - iftot > 0) { 375 printf(" %8d %5d %8d %5d %5d", 376 sum->ift_ip - total->ift_ip, 377 sum->ift_ie - total->ift_ie, 378 sum->ift_op - total->ift_op, 379 sum->ift_oe - total->ift_oe, 380 sum->ift_co - total->ift_co); 381 if (dflag) 382 printf(" %5d", sum->ift_dr - total->ift_dr); 383 } 384 *total = *sum; 385 putchar('\n'); 386 fflush(stdout); 387 line++; 388 oldmask = sigblock(sigmask(SIGALRM)); 389 if (! signalled) { 390 sigpause(0); 391 } 392 sigsetmask(oldmask); 393 signalled = NO; 394 (void)alarm(interval); 395 if (line == 21) 396 goto banner; 397 goto loop; 398 /*NOTREACHED*/ 399 } 400 401 /* 402 * Called if an interval expires before sidewaysintpr has completed a loop. 403 * Sets a flag to not wait for the alarm. 404 */ 405 static void 406 catchalarm(signo) 407 int signo; 408 { 409 signalled = YES; 410 } 411
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