if.c revision 1.14
1 /* $NetBSD: if.c,v 1.14 1995/10/17 07:17:04 jtc 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 1.14 1995/10/17 07:17:04 jtc 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 */ 74 void 75 intpr(interval, ifnetaddr) 76 int interval; 77 u_long ifnetaddr; 78 { 79 struct ifnet ifnet; 80 union { 81 struct ifaddr ifa; 82 struct in_ifaddr in; 83 struct ns_ifaddr ns; 84 struct iso_ifaddr iso; 85 } ifaddr; 86 u_long ifaddraddr; 87 struct sockaddr *sa; 88 char name[16]; 89 90 if (ifnetaddr == 0) { 91 printf("ifnet: symbol not defined\n"); 92 return; 93 } 94 if (interval) { 95 sidewaysintpr((unsigned)interval, ifnetaddr); 96 return; 97 } 98 if (kread(ifnetaddr, (char *)&ifnetaddr, sizeof ifnetaddr)) 99 return; 100 printf("%-5.5s %-5.5s %-11.11s %-17.17s %8.8s %5.5s %8.8s %5.5s", 101 "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs", 102 "Opkts", "Oerrs"); 103 printf(" %5s", "Coll"); 104 if (tflag) 105 printf(" %s", "Time"); 106 if (dflag) 107 printf(" %s", "Drop"); 108 putchar('\n'); 109 ifaddraddr = 0; 110 while (ifnetaddr || ifaddraddr) { 111 struct sockaddr_in *sin; 112 register char *cp; 113 int n, m; 114 115 if (ifaddraddr == 0) { 116 if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) || 117 kread((u_long)ifnet.if_name, name, 16)) 118 return; 119 name[15] = '\0'; 120 ifnetaddr = (u_long)ifnet.if_list.tqe_next; 121 if (interface != 0 && (strcmp(name, interface) != 0 || 122 unit != ifnet.if_unit)) 123 continue; 124 cp = index(name, '\0'); 125 cp += sprintf(cp, "%d", ifnet.if_unit); 126 if ((ifnet.if_flags & IFF_UP) == 0) 127 *cp++ = '*'; 128 *cp = '\0'; 129 ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first; 130 } 131 printf("%-5.5s %-5d ", name, ifnet.if_mtu); 132 if (ifaddraddr == 0) { 133 printf("%-11.11s ", "none"); 134 printf("%-15.15s ", "none"); 135 } else { 136 if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) { 137 ifaddraddr = 0; 138 continue; 139 } 140 #define CP(x) ((char *)(x)) 141 cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) + 142 CP(&ifaddr); sa = (struct sockaddr *)cp; 143 switch (sa->sa_family) { 144 case AF_UNSPEC: 145 printf("%-11.11s ", "none"); 146 printf("%-17.17s ", "none"); 147 break; 148 case AF_INET: 149 sin = (struct sockaddr_in *)sa; 150 #ifdef notdef 151 /* can't use inet_makeaddr because kernel 152 * keeps nets unshifted. 153 */ 154 in = inet_makeaddr(ifaddr.in.ia_subnet, 155 INADDR_ANY); 156 printf("%-11.11s ", netname(in.s_addr, 157 ifaddr.in.ia_subnetmask)); 158 #else 159 printf("%-11.11s ", 160 netname(ifaddr.in.ia_subnet, 161 ifaddr.in.ia_subnetmask)); 162 #endif 163 printf("%-17.17s ", 164 routename(sin->sin_addr.s_addr)); 165 166 if (aflag) { 167 u_long multiaddr; 168 struct in_multi inm; 169 170 multiaddr = (u_long)ifaddr.in.ia_multiaddrs.lh_first; 171 while (multiaddr != 0) { 172 kread(multiaddr, (char *)&inm, 173 sizeof inm); 174 printf("\n%23s %-15.15s ", "", 175 routename(inm.inm_addr.s_addr)); 176 multiaddr = (u_long)inm.inm_list.le_next; 177 } 178 } 179 break; 180 case AF_NS: 181 { 182 struct sockaddr_ns *sns = 183 (struct sockaddr_ns *)sa; 184 u_long net; 185 char netnum[8]; 186 187 *(union ns_net *) &net = sns->sns_addr.x_net; 188 sprintf(netnum, "%lxH", ntohl(net)); 189 upHex(netnum); 190 printf("ns:%-8s ", netnum); 191 printf("%-17s ", 192 ns_phost((struct sockaddr *)sns)); 193 } 194 break; 195 case AF_LINK: 196 { 197 struct sockaddr_dl *sdl = 198 (struct sockaddr_dl *)sa; 199 cp = (char *)LLADDR(sdl); 200 n = sdl->sdl_alen; 201 } 202 m = printf("%-11.11s ", "<Link>"); 203 goto hexprint; 204 default: 205 m = printf("(%d)", sa->sa_family); 206 for (cp = sa->sa_len + (char *)sa; 207 --cp > sa->sa_data && (*cp == 0);) {} 208 n = cp - sa->sa_data + 1; 209 cp = sa->sa_data; 210 hexprint: 211 while (--n >= 0) 212 m += printf("%x%c", *cp++ & 0xff, 213 n > 0 ? '.' : ' '); 214 m = 30 - m; 215 while (m-- > 0) 216 putchar(' '); 217 break; 218 } 219 ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next; 220 } 221 printf("%8d %5d %8d %5d %5d", 222 ifnet.if_ipackets, ifnet.if_ierrors, 223 ifnet.if_opackets, ifnet.if_oerrors, 224 ifnet.if_collisions); 225 if (tflag) 226 printf(" %3d", ifnet.if_timer); 227 if (dflag) 228 printf(" %3d", ifnet.if_snd.ifq_drops); 229 putchar('\n'); 230 } 231 } 232 233 #define MAXIF 10 234 struct iftot { 235 char ift_name[16]; /* interface name */ 236 int ift_ip; /* input packets */ 237 int ift_ie; /* input errors */ 238 int ift_op; /* output packets */ 239 int ift_oe; /* output errors */ 240 int ift_co; /* collisions */ 241 int ift_dr; /* drops */ 242 } iftot[MAXIF]; 243 244 u_char signalled; /* set if alarm goes off "early" */ 245 246 /* 247 * Print a running summary of interface statistics. 248 * Repeat display every interval seconds, showing statistics 249 * collected over that interval. Assumes that interval is non-zero. 250 * First line printed at top of screen is always cumulative. 251 */ 252 static void 253 sidewaysintpr(interval, off) 254 unsigned interval; 255 u_long off; 256 { 257 struct ifnet ifnet; 258 u_long firstifnet; 259 register struct iftot *ip, *total; 260 register int line; 261 struct iftot *lastif, *sum, *interesting; 262 int oldmask; 263 264 if (kread(off, (char *)&firstifnet, sizeof (u_long))) 265 return; 266 lastif = iftot; 267 sum = iftot + MAXIF - 1; 268 total = sum - 1; 269 interesting = iftot; 270 for (off = firstifnet, ip = iftot; off;) { 271 char *cp; 272 273 if (kread(off, (char *)&ifnet, sizeof ifnet)) 274 break; 275 ip->ift_name[0] = '('; 276 if (kread((u_long)ifnet.if_name, ip->ift_name + 1, 15)) 277 break; 278 if (interface && strcmp(ip->ift_name + 1, interface) == 0 && 279 unit == ifnet.if_unit) 280 interesting = ip; 281 ip->ift_name[15] = '\0'; 282 cp = index(ip->ift_name, '\0'); 283 sprintf(cp, "%d)", ifnet.if_unit); 284 ip++; 285 if (ip >= iftot + MAXIF - 2) 286 break; 287 off = (u_long)ifnet.if_list.tqe_next; 288 } 289 lastif = ip; 290 291 (void)signal(SIGALRM, catchalarm); 292 signalled = NO; 293 (void)alarm(interval); 294 banner: 295 printf(" input %-6.6s output ", interesting->ift_name); 296 if (lastif - iftot > 0) { 297 if (dflag) 298 printf(" "); 299 printf(" input (Total) output"); 300 } 301 for (ip = iftot; ip < iftot + MAXIF; ip++) { 302 ip->ift_ip = 0; 303 ip->ift_ie = 0; 304 ip->ift_op = 0; 305 ip->ift_oe = 0; 306 ip->ift_co = 0; 307 ip->ift_dr = 0; 308 } 309 putchar('\n'); 310 printf("%8.8s %5.5s %8.8s %5.5s %5.5s ", 311 "packets", "errs", "packets", "errs", "colls"); 312 if (dflag) 313 printf("%5.5s ", "drops"); 314 if (lastif - iftot > 0) 315 printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", 316 "packets", "errs", "packets", "errs", "colls"); 317 if (dflag) 318 printf(" %5.5s", "drops"); 319 putchar('\n'); 320 fflush(stdout); 321 line = 0; 322 loop: 323 sum->ift_ip = 0; 324 sum->ift_ie = 0; 325 sum->ift_op = 0; 326 sum->ift_oe = 0; 327 sum->ift_co = 0; 328 sum->ift_dr = 0; 329 for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) { 330 if (kread(off, (char *)&ifnet, sizeof ifnet)) { 331 off = 0; 332 continue; 333 } 334 if (ip == interesting) { 335 printf("%8d %5d %8d %5d %5d", 336 ifnet.if_ipackets - ip->ift_ip, 337 ifnet.if_ierrors - ip->ift_ie, 338 ifnet.if_opackets - ip->ift_op, 339 ifnet.if_oerrors - ip->ift_oe, 340 ifnet.if_collisions - ip->ift_co); 341 if (dflag) 342 printf(" %5d", 343 ifnet.if_snd.ifq_drops - ip->ift_dr); 344 } 345 ip->ift_ip = ifnet.if_ipackets; 346 ip->ift_ie = ifnet.if_ierrors; 347 ip->ift_op = ifnet.if_opackets; 348 ip->ift_oe = ifnet.if_oerrors; 349 ip->ift_co = ifnet.if_collisions; 350 ip->ift_dr = ifnet.if_snd.ifq_drops; 351 sum->ift_ip += ip->ift_ip; 352 sum->ift_ie += ip->ift_ie; 353 sum->ift_op += ip->ift_op; 354 sum->ift_oe += ip->ift_oe; 355 sum->ift_co += ip->ift_co; 356 sum->ift_dr += ip->ift_dr; 357 off = (u_long)ifnet.if_list.tqe_next; 358 } 359 if (lastif - iftot > 0) { 360 printf(" %8d %5d %8d %5d %5d", 361 sum->ift_ip - total->ift_ip, 362 sum->ift_ie - total->ift_ie, 363 sum->ift_op - total->ift_op, 364 sum->ift_oe - total->ift_oe, 365 sum->ift_co - total->ift_co); 366 if (dflag) 367 printf(" %5d", sum->ift_dr - total->ift_dr); 368 } 369 *total = *sum; 370 putchar('\n'); 371 fflush(stdout); 372 line++; 373 oldmask = sigblock(sigmask(SIGALRM)); 374 if (! signalled) { 375 sigpause(0); 376 } 377 sigsetmask(oldmask); 378 signalled = NO; 379 (void)alarm(interval); 380 if (line == 21) 381 goto banner; 382 goto loop; 383 /*NOTREACHED*/ 384 } 385 386 /* 387 * Called if an interval expires before sidewaysintpr has completed a loop. 388 * Sets a flag to not wait for the alarm. 389 */ 390 static void 391 catchalarm(signo) 392 int signo; 393 { 394 signalled = YES; 395 } 396
Indexes created Sat Sep 27 22:09:54 GMT 2025