if.c revision 1.20
1 /* $NetBSD: if.c,v 1.20 1997/03/26 01:51:25 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 1.20 1997/03/26 01:51:25 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 <net/if_types.h> 51 #include <netinet/in.h> 52 #include <netinet/in_var.h> 53 #include <netns/ns.h> 54 #include <netns/ns_if.h> 55 #include <netiso/iso.h> 56 #include <netiso/iso_var.h> 57 #include <arpa/inet.h> 58 59 #include <signal.h> 60 #include <stdio.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 #include "netstat.h" 65 66 #define YES 1 67 #define NO 0 68 69 static void sidewaysintpr __P((u_int, u_long)); 70 static void catchalarm __P((int)); 71 72 /* 73 * Print a description of the network interfaces. 74 * NOTE: ifnetaddr is the location of the kernel global "ifnet", 75 * which is a TAILQ_HEAD. 76 */ 77 void 78 intpr(interval, ifnetaddr) 79 int interval; 80 u_long ifnetaddr; 81 { 82 struct ifnet ifnet; 83 union { 84 struct ifaddr ifa; 85 struct in_ifaddr in; 86 struct ns_ifaddr ns; 87 struct iso_ifaddr iso; 88 } ifaddr; 89 u_long ifaddraddr; 90 struct sockaddr *sa; 91 struct ifnet_head ifhead; /* TAILQ_HEAD */ 92 char name[IFNAMSIZ]; 93 94 if (ifnetaddr == 0) { 95 printf("ifnet: symbol not defined\n"); 96 return; 97 } 98 if (interval) { 99 sidewaysintpr((unsigned)interval, ifnetaddr); 100 return; 101 } 102 103 /* 104 * Find the pointer to the first ifnet structure. Replace 105 * the pointer to the TAILQ_HEAD with the actual pointer 106 * to the first list element. 107 */ 108 if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead)) 109 return; 110 ifnetaddr = (u_long)ifhead.tqh_first; 111 112 printf("%-5.5s %-5.5s %-11.11s %-17.17s %8.8s %5.5s %8.8s %5.5s", 113 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 114 "Opkts", "Oerrs"); 115 printf(" %5s", "Coll"); 116 if (tflag) 117 printf(" %s", "Time"); 118 if (dflag) 119 printf(" %s", "Drop"); 120 putchar('\n'); 121 ifaddraddr = 0; 122 while (ifnetaddr || ifaddraddr) { 123 struct sockaddr_in *sin; 124 register char *cp; 125 int n, m; 126 127 if (ifaddraddr == 0) { 128 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet)) 129 return; 130 bcopy(ifnet.if_xname, name, IFNAMSIZ); 131 name[IFNAMSIZ - 1] = '\0'; /* sanity */ 132 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 133 if (interface != 0 && strcmp(name, interface) != 0) 134 continue; 135 cp = index(name, '\0'); 136 if ((ifnet.if_flags & IFF_UP) == 0) 137 *cp++ = '*'; 138 *cp = '\0'; 139 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 140 } 141 printf("%-5.5s %-5d ", name, ifnet.if_mtu); 142 if (ifaddraddr == 0) { 143 printf("%-11.11s ", "none"); 144 printf("%-15.15s ", "none"); 145 } else { 146 char hexsep = '.'; /* for hexprint */ 147 const char *hexfmt = "%x%c"; /* for hexprint */ 148 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 149 ifaddraddr = 0; 150 continue; 151 } 152 #define CP(x) ((char *)(x)) 153 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 154 CP(&ifaddr); sa = (struct sockaddr *)cp; 155 switch (sa->sa_family) { 156 case AF_UNSPEC: 157 printf("%-11.11s ", "none"); 158 printf("%-17.17s ", "none"); 159 break; 160 case AF_INET: 161 sin = (struct sockaddr_in *)sa; 162 #ifdef notdef 163 /* can't use inet_makeaddr because kernel 164 * keeps nets unshifted. 165 */ 166 in = inet_makeaddr(ifaddr.in.ia_subnet, 167 INADDR_ANY); 168 printf("%-11.11s ", netname(in.s_addr, 169 ifaddr.in.ia_subnetmask)); 170 #else 171 printf("%-11.11s ", 172 netname(ifaddr.in.ia_subnet, 173 ifaddr.in.ia_subnetmask)); 174 #endif 175 printf("%-17.17s ", 176 routename(sin->sin_addr.s_addr)); 177 178 if (aflag) { 179 u_long multiaddr; 180 struct in_multi inm; 181 182 multiaddr = (u_long)ifaddr.in.ia_multiaddrs.lh_first; 183 while (multiaddr != 0) { 184 kread(multiaddr, (char *)&inm, 185 sizeof inm); 186 printf("\n%23s %-15.15s ", "", 187 routename(inm.inm_addr.s_addr)); 188 multiaddr = (u_long)inm.inm_list.le_next; 189 } 190 } 191 break; 192 case AF_NS: 193 { 194 struct sockaddr_ns *sns = 195 (struct sockaddr_ns *)sa; 196 u_long net; 197 char netnum[8]; 198 199 *(union ns_net *) &net = sns->sns_addr.x_net; 200 sprintf(netnum, "%lxH", ntohl(net)); 201 upHex(netnum); 202 printf("ns:%-8s ", netnum); 203 printf("%-17s ", 204 ns_phost((struct sockaddr *)sns)); 205 } 206 break; 207 case AF_LINK: 208 { 209 struct sockaddr_dl *sdl = 210 (struct sockaddr_dl *)sa; 211 cp = (char *)LLADDR(sdl); 212 if (sdl->sdl_type == IFT_FDDI 213 || sdl->sdl_type == IFT_ETHER) 214 hexsep = ':', hexfmt = "%02x%c"; 215 n = sdl->sdl_alen; 216 } 217 m = printf("%-11.11s ", "<Link>"); 218 goto hexprint; 219 default: 220 m = printf("(%d)", sa->sa_family); 221 for (cp = sa->sa_len + (char *)sa; 222 --cp > sa->sa_data && (*cp == 0);) {} 223 n = cp - sa->sa_data + 1; 224 cp = sa->sa_data; 225 hexprint: 226 while (--n >= 0) 227 m += printf(hexfmt, *cp++ & 0xff, 228 n > 0 ? hexsep : ' '); 229 m = 30 - m; 230 while (m-- > 0) 231 putchar(' '); 232 break; 233 } 234 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 235 } 236 printf("%8d %5d %8d %5d %5d", 237 ifnet.if_ipackets, ifnet.if_ierrors, 238 ifnet.if_opackets, ifnet.if_oerrors, 239 ifnet.if_collisions); 240 if (tflag) 241 printf(" %3d", ifnet.if_timer); 242 if (dflag) 243 printf(" %3d", ifnet.if_snd.ifq_drops); 244 putchar('\n'); 245 } 246 } 247 248 #define MAXIF 100 249 struct iftot { 250 char ift_name[IFNAMSIZ]; /* interface name */ 251 int ift_ip; /* input packets */ 252 int ift_ie; /* input errors */ 253 int ift_op; /* output packets */ 254 int ift_oe; /* output errors */ 255 int ift_co; /* collisions */ 256 int ift_dr; /* drops */ 257 } iftot[MAXIF]; 258 259 u_char signalled; /* set if alarm goes off "early" */ 260 261 /* 262 * Print a running summary of interface statistics. 263 * Repeat display every interval seconds, showing statistics 264 * collected over that interval. Assumes that interval is non-zero. 265 * First line printed at top of screen is always cumulative. 266 */ 267 static void 268 sidewaysintpr(interval, off) 269 unsigned interval; 270 u_long off; 271 { 272 struct ifnet ifnet; 273 u_long firstifnet; 274 register struct iftot *ip, *total; 275 register int line; 276 struct iftot *lastif, *sum, *interesting; 277 struct ifnet_head ifhead; /* TAILQ_HEAD */ 278 int oldmask; 279 280 /* 281 * Find the pointer to the first ifnet structure. Replace 282 * the pointer to the TAILQ_HEAD with the actual pointer 283 * to the first list element. 284 */ 285 if (kread(off, (char *)&ifhead, sizeof ifhead)) 286 return; 287 firstifnet = (u_long)ifhead.tqh_first; 288 289 lastif = iftot; 290 sum = iftot + MAXIF - 1; 291 total = sum - 1; 292 interesting = (interface == NULL) ? iftot : NULL; 293 for (off = firstifnet, ip = iftot; off;) { 294 if (kread(off, (char *)&ifnet, sizeof ifnet)) 295 break; 296 bzero(ip->ift_name, sizeof(ip->ift_name)); 297 snprintf(ip->ift_name, IFNAMSIZ, "(%s)", ifnet.if_xname); 298 if (interface && strcmp(ifnet.if_xname, interface) == 0) 299 interesting = ip; 300 ip++; 301 if (ip >= iftot + MAXIF - 2) 302 break; 303 off = (u_long)ifnet.if_list.tqe_next; 304 } 305 if (interesting == NULL) { 306 fprintf(stderr, "%s: %s: unknown interface\n", 307 __progname, interface); 308 exit(1); 309 } 310 lastif = ip; 311 312 (void)signal(SIGALRM, catchalarm); 313 signalled = NO; 314 (void)alarm(interval); 315 banner: 316 printf(" input %-6.6s output ", interesting->ift_name); 317 if (lastif - iftot > 0) { 318 if (dflag) 319 printf(" "); 320 printf(" input (Total) output"); 321 } 322 for (ip = iftot; ip < iftot + MAXIF; ip++) { 323 ip->ift_ip = 0; 324 ip->ift_ie = 0; 325 ip->ift_op = 0; 326 ip->ift_oe = 0; 327 ip->ift_co = 0; 328 ip->ift_dr = 0; 329 } 330 putchar('\n'); 331 printf("%8.8s %5.5s %8.8s %5.5s %5.5s ", 332 "packets", "errs", "packets", "errs", "colls"); 333 if (dflag) 334 printf("%5.5s ", "drops"); 335 if (lastif - iftot > 0) 336 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 337 "packets", "errs", "packets", "errs", "colls"); 338 if (dflag) 339 printf(" %5.5s", "drops"); 340 putchar('\n'); 341 fflush(stdout); 342 line = 0; 343 loop: 344 sum->ift_ip = 0; 345 sum->ift_ie = 0; 346 sum->ift_op = 0; 347 sum->ift_oe = 0; 348 sum->ift_co = 0; 349 sum->ift_dr = 0; 350 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 351 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 352 off = 0; 353 continue; 354 } 355 if (ip == interesting) { 356 printf("%8d %5d %8d %5d %5d", 357 ifnet.if_ipackets - ip->ift_ip, 358 ifnet.if_ierrors - ip->ift_ie, 359 ifnet.if_opackets - ip->ift_op, 360 ifnet.if_oerrors - ip->ift_oe, 361 ifnet.if_collisions - ip->ift_co); 362 if (dflag) 363 printf(" %5d", 364 ifnet.if_snd.ifq_drops - ip->ift_dr); 365 } 366 ip->ift_ip = ifnet.if_ipackets; 367 ip->ift_ie = ifnet.if_ierrors; 368 ip->ift_op = ifnet.if_opackets; 369 ip->ift_oe = ifnet.if_oerrors; 370 ip->ift_co = ifnet.if_collisions; 371 ip->ift_dr = ifnet.if_snd.ifq_drops; 372 sum->ift_ip += ip->ift_ip; 373 sum->ift_ie += ip->ift_ie; 374 sum->ift_op += ip->ift_op; 375 sum->ift_oe += ip->ift_oe; 376 sum->ift_co += ip->ift_co; 377 sum->ift_dr += ip->ift_dr; 378 off = (u_long)ifnet.if_list.tqe_next; 379 } 380 if (lastif - iftot > 0) { 381 printf(" %8d %5d %8d %5d %5d", 382 sum->ift_ip - total->ift_ip, 383 sum->ift_ie - total->ift_ie, 384 sum->ift_op - total->ift_op, 385 sum->ift_oe - total->ift_oe, 386 sum->ift_co - total->ift_co); 387 if (dflag) 388 printf(" %5d", sum->ift_dr - total->ift_dr); 389 } 390 *total = *sum; 391 putchar('\n'); 392 fflush(stdout); 393 line++; 394 oldmask = sigblock(sigmask(SIGALRM)); 395 if (! signalled) { 396 sigpause(0); 397 } 398 sigsetmask(oldmask); 399 signalled = NO; 400 (void)alarm(interval); 401 if (line == 21) 402 goto banner; 403 goto loop; 404 /*NOTREACHED*/ 405 } 406 407 /* 408 * Called if an interval expires before sidewaysintpr has completed a loop. 409 * Sets a flag to not wait for the alarm. 410 */ 411 static void 412 catchalarm(signo) 413 int signo; 414 { 415 signalled = YES; 416 } 417
Indexes created Thu Sep 25 16:09:42 GMT 2025