route.c revision 1.68
1 /* $NetBSD: route.c,v 1.68 2006/08/26 15:33:20 matt 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94"; 36 #else 37 __RCSID("$NetBSD: route.c,v 1.68 2006/08/26 15:33:20 matt Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/mbuf.h> 45 #include <sys/un.h> 46 47 #include <net/if.h> 48 #include <net/if_dl.h> 49 #include <net/if_types.h> 50 #define _KERNEL 51 #include <net/route.h> 52 #undef _KERNEL 53 #include <netinet/in.h> 54 #include <netatalk/at.h> 55 #include <netiso/iso.h> 56 57 #ifdef NS 58 #include <netns/ns.h> 59 #endif 60 61 #include <sys/sysctl.h> 62 63 #include <arpa/inet.h> 64 65 #include <err.h> 66 #include <kvm.h> 67 #include <netdb.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <unistd.h> 72 73 #include "netstat.h" 74 75 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d))) 76 77 /* alignment constraint for routing socket */ 78 #define ROUNDUP(a) \ 79 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 80 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 81 82 /* 83 * XXX we put all of the sockaddr types in here to force the alignment 84 * to be correct. 85 */ 86 static union sockaddr_union { 87 struct sockaddr u_sa; 88 struct sockaddr_in u_in; 89 struct sockaddr_un u_un; 90 struct sockaddr_iso u_iso; 91 struct sockaddr_at u_at; 92 struct sockaddr_dl u_dl; 93 #ifdef NS 94 struct sockaddr_ns u_ns; 95 #endif 96 u_short u_data[128]; 97 int u_dummy; /* force word-alignment */ 98 } pt_u; 99 100 int do_rtent = 0; 101 struct rtentry rtentry; 102 struct radix_node rnode; 103 struct radix_mask rmask; 104 105 static struct sockaddr *kgetsa(struct sockaddr *); 106 static void p_tree(struct radix_node *); 107 static void p_rtnode(void); 108 static void p_krtentry(struct rtentry *); 109 110 /* 111 * Print routing tables. 112 */ 113 void 114 routepr(rtree) 115 u_long rtree; 116 { 117 struct radix_node_head *rnh, head; 118 struct radix_node_head *rt_tables[AF_MAX+1]; 119 int i; 120 121 printf("Routing tables\n"); 122 123 if (rtree == 0) { 124 printf("rt_tables: symbol not in namelist\n"); 125 return; 126 } 127 128 kget(rtree, rt_tables); 129 for (i = 0; i <= AF_MAX; i++) { 130 if ((rnh = rt_tables[i]) == 0) 131 continue; 132 kget(rnh, head); 133 if (i == AF_UNSPEC) { 134 if (Aflag && (af == 0 || af == 0xff)) { 135 printf("Netmasks:\n"); 136 p_tree(head.rnh_treetop); 137 } 138 } else if (af == AF_UNSPEC || af == i) { 139 pr_family(i); 140 do_rtent = 1; 141 pr_rthdr(i, Aflag); 142 p_tree(head.rnh_treetop); 143 } 144 } 145 } 146 147 static struct sockaddr * 148 kgetsa(dst) 149 struct sockaddr *dst; 150 { 151 152 kget(dst, pt_u.u_sa); 153 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 154 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 155 return (&pt_u.u_sa); 156 } 157 158 static void 159 p_tree(rn) 160 struct radix_node *rn; 161 { 162 163 again: 164 kget(rn, rnode); 165 if (rnode.rn_b < 0) { 166 if (Aflag) 167 printf("%-8.8lx ", (u_long) rn); 168 if (rnode.rn_flags & RNF_ROOT) { 169 if (Aflag) 170 printf("(root node)%s", 171 rnode.rn_dupedkey ? " =>\n" : "\n"); 172 } else if (do_rtent) { 173 kget(rn, rtentry); 174 p_krtentry(&rtentry); 175 if (Aflag) 176 p_rtnode(); 177 } else { 178 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 179 NULL, 0, 44); 180 putchar('\n'); 181 } 182 if ((rn = rnode.rn_dupedkey) != NULL) 183 goto again; 184 } else { 185 if (Aflag && do_rtent) { 186 printf("%-8.8lx ", (u_long) rn); 187 p_rtnode(); 188 } 189 rn = rnode.rn_r; 190 p_tree(rnode.rn_l); 191 p_tree(rn); 192 } 193 } 194 195 static void 196 p_rtnode() 197 { 198 struct radix_mask *rm = rnode.rn_mklist; 199 char nbuf[20]; 200 201 if (rnode.rn_b < 0) { 202 if (rnode.rn_mask) { 203 printf("\t mask "); 204 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 205 NULL, 0, -1); 206 } else if (rm == 0) 207 return; 208 } else { 209 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 210 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 211 (u_long) rnode.rn_r); 212 } 213 while (rm) { 214 kget(rm, rmask); 215 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 216 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 217 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 218 if (rmask.rm_flags & RNF_NORMAL) { 219 struct radix_node rnode_aux; 220 printf(" <normal>, "); 221 kget(rmask.rm_leaf, rnode_aux); 222 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 223 NULL, 0, -1); 224 } else 225 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 226 NULL, 0, -1); 227 putchar('}'); 228 if ((rm = rmask.rm_mklist) != NULL) 229 printf(" ->"); 230 } 231 putchar('\n'); 232 } 233 234 static struct sockaddr *sockcopy __P((struct sockaddr *, 235 union sockaddr_union *)); 236 237 /* 238 * copy a sockaddr into an allocated region, allocate at least sockaddr 239 * bytes and zero unused 240 */ 241 static struct sockaddr * 242 sockcopy(sp, dp) 243 struct sockaddr *sp; 244 union sockaddr_union *dp; 245 { 246 int len; 247 248 if (sp == 0 || sp->sa_len == 0) 249 (void)memset(dp, 0, sizeof (*sp)); 250 else { 251 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 252 (void)memcpy(dp, sp, len); 253 } 254 return ((struct sockaddr *)dp); 255 } 256 257 static void 258 p_krtentry(rt) 259 struct rtentry *rt; 260 { 261 static struct ifnet ifnet, *lastif; 262 union sockaddr_union addr_un, mask_un; 263 struct sockaddr *addr, *mask; 264 int af; 265 266 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 267 return; 268 269 memset(&addr_un, 0, sizeof(addr_un)); 270 memset(&mask_un, 0, sizeof(mask_un)); 271 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 272 af = addr->sa_family; 273 if (rt_mask(rt)) 274 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 275 else 276 mask = sockcopy(NULL, &mask_un); 277 p_addr(addr, mask, rt->rt_flags); 278 p_gwaddr(kgetsa(rt->rt_gateway), kgetsa(rt->rt_gateway)->sa_family); 279 p_flags(rt->rt_flags, "%-6.6s "); 280 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 281 if (rt->rt_rmx.rmx_mtu) 282 printf("%6lu", rt->rt_rmx.rmx_mtu); 283 else 284 printf("%6s", "-"); 285 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 286 if (rt->rt_ifp) { 287 if (rt->rt_ifp != lastif) { 288 kget(rt->rt_ifp, ifnet); 289 lastif = rt->rt_ifp; 290 } 291 printf(" %.16s%s", ifnet.if_xname, 292 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 293 } 294 putchar('\n'); 295 if (vflag) { 296 printf("\texpire %10lu%c recvpipe %10ld%c " 297 "sendpipe %10ld%c\n", 298 rt->rt_rmx.rmx_expire, 299 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 300 rt->rt_rmx.rmx_recvpipe, 301 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 302 rt->rt_rmx.rmx_sendpipe, 303 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 304 printf("\tssthresh %10lu%c rtt %10ld%c " 305 "rttvar %10ld%c\n", 306 rt->rt_rmx.rmx_ssthresh, 307 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 308 rt->rt_rmx.rmx_rtt, 309 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 310 rt->rt_rmx.rmx_rttvar, 311 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 312 printf("\thopcount %10lu%c\n", 313 rt->rt_rmx.rmx_hopcount, 314 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 315 } 316 } 317 318 /* 319 * Print routing statistics 320 */ 321 void 322 rt_stats(off) 323 u_long off; 324 { 325 struct rtstat rtstat; 326 327 if (use_sysctl) { 328 size_t rtsize = sizeof(rtstat); 329 330 if (sysctlbyname("net.route.stats", &rtstat, &rtsize, 331 NULL, 0) == -1) 332 err(1, "rt_stats: sysctl"); 333 } else if (off == 0) { 334 printf("rtstat: symbol not in namelist\n"); 335 return; 336 } else 337 kread(off, (char *)&rtstat, sizeof (rtstat)); 338 339 printf("routing:\n"); 340 printf("\t%llu bad routing redirect%s\n", 341 (unsigned long long)rtstat.rts_badredirect, 342 plural(rtstat.rts_badredirect)); 343 printf("\t%llu dynamically created route%s\n", 344 (unsigned long long)rtstat.rts_dynamic, 345 plural(rtstat.rts_dynamic)); 346 printf("\t%llu new gateway%s due to redirects\n", 347 (unsigned long long)rtstat.rts_newgateway, 348 plural(rtstat.rts_newgateway)); 349 printf("\t%llu destination%s found unreachable\n", 350 (unsigned long long)rtstat.rts_unreach, 351 plural(rtstat.rts_unreach)); 352 printf("\t%llu use%s of a wildcard route\n", 353 (unsigned long long)rtstat.rts_wildcard, 354 plural(rtstat.rts_wildcard)); 355 } 356 357 #ifdef NS 358 short ns_nullh[] = {0,0,0}; 359 short ns_bh[] = {-1,-1,-1}; 360 361 char * 362 ns_print(sa) 363 struct sockaddr *sa; 364 { 365 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 366 struct ns_addr work; 367 union { 368 union ns_net net_e; 369 u_long long_e; 370 } net; 371 u_short port; 372 static char mybuf[50], cport[10], chost[25]; 373 char *host = ""; 374 char *p; 375 u_char *q; 376 377 work = sns->sns_addr; 378 port = ntohs(work.x_port); 379 work.x_port = 0; 380 net.net_e = work.x_net; 381 if (ns_nullhost(work) && net.long_e == 0) { 382 if (port ) { 383 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 384 upHex(mybuf); 385 } else 386 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 387 return (mybuf); 388 } 389 390 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 391 host = "any"; 392 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 393 host = "*"; 394 } else { 395 q = work.x_host.c_host; 396 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 397 q[0], q[1], q[2], q[3], q[4], q[5]); 398 for (p = chost; *p == '0' && p < chost + 12; p++) 399 continue; 400 host = p; 401 } 402 if (port) 403 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 404 else 405 *cport = 0; 406 407 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 408 host, cport); 409 upHex(mybuf); 410 return (mybuf); 411 } 412 413 char * 414 ns_phost(sa) 415 struct sockaddr *sa; 416 { 417 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 418 struct sockaddr_ns work; 419 static union ns_net ns_zeronet; 420 char *p; 421 422 work = *sns; 423 work.sns_addr.x_port = 0; 424 work.sns_addr.x_net = ns_zeronet; 425 426 p = ns_print((struct sockaddr *)&work); 427 if (strncmp("0H.", p, 3) == 0) 428 p += 3; 429 return (p); 430 } 431 #endif 432 433 void 434 upHex(p0) 435 char *p0; 436 { 437 char *p = p0; 438 439 for (; *p; p++) 440 switch (*p) { 441 case 'a': 442 case 'b': 443 case 'c': 444 case 'd': 445 case 'e': 446 case 'f': 447 *p += ('A' - 'a'); 448 } 449 } 450 451 452
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