if.c revision 1.15
1 /* $NetBSD: if.c,v 1.15 1996/05/07 02:55:00 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 1.15 1996/05/07 02:55:00 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 && 133 (strlen(name) != strlen(interface) || 134 strcmp(name, interface) != 0)) 135 continue; 136 cp = index(name, '\0'); 137 if ((ifnet.if_flags & IFF_UP) == 0) 138 *cp++ = '*'; 139 *cp = '\0'; 140 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 141 } 142 printf("%-5.5s %-5d ", name, ifnet.if_mtu); 143 if (ifaddraddr == 0) { 144 printf("%-11.11s ", "none"); 145 printf("%-15.15s ", "none"); 146 } else { 147 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 148 ifaddraddr = 0; 149 continue; 150 } 151 #define CP(x) ((char *)(x)) 152 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 153 CP(&ifaddr); sa = (struct sockaddr *)cp; 154 switch (sa->sa_family) { 155 case AF_UNSPEC: 156 printf("%-11.11s ", "none"); 157 printf("%-17.17s ", "none"); 158 break; 159 case AF_INET: 160 sin = (struct sockaddr_in *)sa; 161 #ifdef notdef 162 /* can't use inet_makeaddr because kernel 163 * keeps nets unshifted. 164 */ 165 in = inet_makeaddr(ifaddr.in.ia_subnet, 166 INADDR_ANY); 167 printf("%-11.11s ", netname(in.s_addr, 168 ifaddr.in.ia_subnetmask)); 169 #else 170 printf("%-11.11s ", 171 netname(ifaddr.in.ia_subnet, 172 ifaddr.in.ia_subnetmask)); 173 #endif 174 printf("%-17.17s ", 175 routename(sin->sin_addr.s_addr)); 176 177 if (aflag) { 178 u_long multiaddr; 179 struct in_multi inm; 180 181 multiaddr = (u_long)ifaddr.in.ia_multiaddrs.lh_first; 182 while (multiaddr != 0) { 183 kread(multiaddr, (char *)&inm, 184 sizeof inm); 185 printf("\n%23s %-15.15s ", "", 186 routename(inm.inm_addr.s_addr)); 187 multiaddr = (u_long)inm.inm_list.le_next; 188 } 189 } 190 break; 191 case AF_NS: 192 { 193 struct sockaddr_ns *sns = 194 (struct sockaddr_ns *)sa; 195 u_long net; 196 char netnum[8]; 197 198 *(union ns_net *) &net = sns->sns_addr.x_net; 199 sprintf(netnum, "%lxH", ntohl(net)); 200 upHex(netnum); 201 printf("ns:%-8s ", netnum); 202 printf("%-17s ", 203 ns_phost((struct sockaddr *)sns)); 204 } 205 break; 206 case AF_LINK: 207 { 208 struct sockaddr_dl *sdl = 209 (struct sockaddr_dl *)sa; 210 cp = (char *)LLADDR(sdl); 211 n = sdl->sdl_alen; 212 } 213 m = printf("%-11.11s ", "<Link>"); 214 goto hexprint; 215 default: 216 m = printf("(%d)", sa->sa_family); 217 for (cp = sa->sa_len + (char *)sa; 218 --cp > sa->sa_data && (*cp == 0);) {} 219 n = cp - sa->sa_data + 1; 220 cp = sa->sa_data; 221 hexprint: 222 while (--n >= 0) 223 m += printf("%x%c", *cp++ & 0xff, 224 n > 0 ? '.' : ' '); 225 m = 30 - m; 226 while (m-- > 0) 227 putchar(' '); 228 break; 229 } 230 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 231 } 232 printf("%8d %5d %8d %5d %5d", 233 ifnet.if_ipackets, ifnet.if_ierrors, 234 ifnet.if_opackets, ifnet.if_oerrors, 235 ifnet.if_collisions); 236 if (tflag) 237 printf(" %3d", ifnet.if_timer); 238 if (dflag) 239 printf(" %3d", ifnet.if_snd.ifq_drops); 240 putchar('\n'); 241 } 242 } 243 244 #define MAXIF 10 245 struct iftot { 246 char ift_name[IFNAMSIZ]; /* interface name */ 247 int ift_ip; /* input packets */ 248 int ift_ie; /* input errors */ 249 int ift_op; /* output packets */ 250 int ift_oe; /* output errors */ 251 int ift_co; /* collisions */ 252 int ift_dr; /* drops */ 253 } iftot[MAXIF]; 254 255 u_char signalled; /* set if alarm goes off "early" */ 256 257 /* 258 * Print a running summary of interface statistics. 259 * Repeat display every interval seconds, showing statistics 260 * collected over that interval. Assumes that interval is non-zero. 261 * First line printed at top of screen is always cumulative. 262 */ 263 static void 264 sidewaysintpr(interval, off) 265 unsigned interval; 266 u_long off; 267 { 268 struct ifnet ifnet; 269 u_long firstifnet; 270 register struct iftot *ip, *total; 271 register int line; 272 struct iftot *lastif, *sum, *interesting; 273 struct ifnet_head ifhead; /* TAILQ_HEAD */ 274 int oldmask; 275 276 /* 277 * Find the pointer to the first ifnet structure. Replace 278 * the pointer to the TAILQ_HEAD with the actual pointer 279 * to the first list element. 280 */ 281 if (kread(off, (char *)&ifhead, sizeof ifhead)) 282 return; 283 firstifnet = (u_long)ifhead.tqh_first; 284 285 lastif = iftot; 286 sum = iftot + MAXIF - 1; 287 total = sum - 1; 288 interesting = iftot; 289 for (off = firstifnet, ip = iftot; off;) { 290 if (kread(off, (char *)&ifnet, sizeof ifnet)) 291 break; 292 ip->ift_name[0] = '('; 293 bcopy(ifnet.if_xname, ip->ift_name + 1, IFNAMSIZ - 1); 294 if (interface && 295 strlen(ip->ift_name + 1) == strlen(interface) && 296 strcmp(ip->ift_name + 1, interface) == 0) 297 interesting = ip; 298 ip->ift_name[IFNAMSIZ - 1] = '\0'; 299 ip++; 300 if (ip >= iftot + MAXIF - 2) 301 break; 302 off = (u_long)ifnet.if_list.tqe_next; 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
Indexes created Thu Sep 25 16:09:42 GMT 2025