route.c revision 1.67
1 /* $NetBSD: route.c,v 1.67 2006/05/28 16:51:40 elad 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 1.67 2006/05/28 16:51:40 elad 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 #include <netns/ns.h> 58 59 #include <sys/sysctl.h> 60 61 #include <arpa/inet.h> 62 63 #include <err.h> 64 #include <kvm.h> 65 #include <netdb.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 71 #include "netstat.h" 72 73 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d))) 74 75 /* alignment constraint for routing socket */ 76 #define ROUNDUP(a) \ 77 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 78 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 79 80 /* 81 * XXX we put all of the sockaddr types in here to force the alignment 82 * to be correct. 83 */ 84 static union sockaddr_union { 85 struct sockaddr u_sa; 86 struct sockaddr_in u_in; 87 struct sockaddr_un u_un; 88 struct sockaddr_iso u_iso; 89 struct sockaddr_at u_at; 90 struct sockaddr_dl u_dl; 91 struct sockaddr_ns u_ns; 92 u_short u_data[128]; 93 int u_dummy; /* force word-alignment */ 94 } pt_u; 95 96 int do_rtent = 0; 97 struct rtentry rtentry; 98 struct radix_node rnode; 99 struct radix_mask rmask; 100 101 static struct sockaddr *kgetsa(struct sockaddr *); 102 static void p_tree(struct radix_node *); 103 static void p_rtnode(void); 104 static void p_krtentry(struct rtentry *); 105 106 /* 107 * Print routing tables. 108 */ 109 void 110 routepr(rtree) 111 u_long rtree; 112 { 113 struct radix_node_head *rnh, head; 114 struct radix_node_head *rt_tables[AF_MAX+1]; 115 int i; 116 117 printf("Routing tables\n"); 118 119 if (rtree == 0) { 120 printf("rt_tables: symbol not in namelist\n"); 121 return; 122 } 123 124 kget(rtree, rt_tables); 125 for (i = 0; i <= AF_MAX; i++) { 126 if ((rnh = rt_tables[i]) == 0) 127 continue; 128 kget(rnh, head); 129 if (i == AF_UNSPEC) { 130 if (Aflag && (af == 0 || af == 0xff)) { 131 printf("Netmasks:\n"); 132 p_tree(head.rnh_treetop); 133 } 134 } else if (af == AF_UNSPEC || af == i) { 135 pr_family(i); 136 do_rtent = 1; 137 pr_rthdr(i, Aflag); 138 p_tree(head.rnh_treetop); 139 } 140 } 141 } 142 143 static struct sockaddr * 144 kgetsa(dst) 145 struct sockaddr *dst; 146 { 147 148 kget(dst, pt_u.u_sa); 149 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 150 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 151 return (&pt_u.u_sa); 152 } 153 154 static void 155 p_tree(rn) 156 struct radix_node *rn; 157 { 158 159 again: 160 kget(rn, rnode); 161 if (rnode.rn_b < 0) { 162 if (Aflag) 163 printf("%-8.8lx ", (u_long) rn); 164 if (rnode.rn_flags & RNF_ROOT) { 165 if (Aflag) 166 printf("(root node)%s", 167 rnode.rn_dupedkey ? " =>\n" : "\n"); 168 } else if (do_rtent) { 169 kget(rn, rtentry); 170 p_krtentry(&rtentry); 171 if (Aflag) 172 p_rtnode(); 173 } else { 174 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 175 NULL, 0, 44); 176 putchar('\n'); 177 } 178 if ((rn = rnode.rn_dupedkey) != NULL) 179 goto again; 180 } else { 181 if (Aflag && do_rtent) { 182 printf("%-8.8lx ", (u_long) rn); 183 p_rtnode(); 184 } 185 rn = rnode.rn_r; 186 p_tree(rnode.rn_l); 187 p_tree(rn); 188 } 189 } 190 191 static void 192 p_rtnode() 193 { 194 struct radix_mask *rm = rnode.rn_mklist; 195 char nbuf[20]; 196 197 if (rnode.rn_b < 0) { 198 if (rnode.rn_mask) { 199 printf("\t mask "); 200 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 201 NULL, 0, -1); 202 } else if (rm == 0) 203 return; 204 } else { 205 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 206 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 207 (u_long) rnode.rn_r); 208 } 209 while (rm) { 210 kget(rm, rmask); 211 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 212 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 213 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 214 if (rmask.rm_flags & RNF_NORMAL) { 215 struct radix_node rnode_aux; 216 printf(" <normal>, "); 217 kget(rmask.rm_leaf, rnode_aux); 218 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 219 NULL, 0, -1); 220 } else 221 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 222 NULL, 0, -1); 223 putchar('}'); 224 if ((rm = rmask.rm_mklist) != NULL) 225 printf(" ->"); 226 } 227 putchar('\n'); 228 } 229 230 static struct sockaddr *sockcopy __P((struct sockaddr *, 231 union sockaddr_union *)); 232 233 /* 234 * copy a sockaddr into an allocated region, allocate at least sockaddr 235 * bytes and zero unused 236 */ 237 static struct sockaddr * 238 sockcopy(sp, dp) 239 struct sockaddr *sp; 240 union sockaddr_union *dp; 241 { 242 int len; 243 244 if (sp == 0 || sp->sa_len == 0) 245 (void)memset(dp, 0, sizeof (*sp)); 246 else { 247 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 248 (void)memcpy(dp, sp, len); 249 } 250 return ((struct sockaddr *)dp); 251 } 252 253 static void 254 p_krtentry(rt) 255 struct rtentry *rt; 256 { 257 static struct ifnet ifnet, *lastif; 258 union sockaddr_union addr_un, mask_un; 259 struct sockaddr *addr, *mask; 260 int af; 261 262 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 263 return; 264 265 memset(&addr_un, 0, sizeof(addr_un)); 266 memset(&mask_un, 0, sizeof(mask_un)); 267 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 268 af = addr->sa_family; 269 if (rt_mask(rt)) 270 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 271 else 272 mask = sockcopy(NULL, &mask_un); 273 p_addr(addr, mask, rt->rt_flags); 274 p_gwaddr(kgetsa(rt->rt_gateway), kgetsa(rt->rt_gateway)->sa_family); 275 p_flags(rt->rt_flags, "%-6.6s "); 276 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 277 if (rt->rt_rmx.rmx_mtu) 278 printf("%6lu", rt->rt_rmx.rmx_mtu); 279 else 280 printf("%6s", "-"); 281 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 282 if (rt->rt_ifp) { 283 if (rt->rt_ifp != lastif) { 284 kget(rt->rt_ifp, ifnet); 285 lastif = rt->rt_ifp; 286 } 287 printf(" %.16s%s", ifnet.if_xname, 288 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 289 } 290 putchar('\n'); 291 if (vflag) { 292 printf("\texpire %10lu%c recvpipe %10ld%c " 293 "sendpipe %10ld%c\n", 294 rt->rt_rmx.rmx_expire, 295 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 296 rt->rt_rmx.rmx_recvpipe, 297 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 298 rt->rt_rmx.rmx_sendpipe, 299 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 300 printf("\tssthresh %10lu%c rtt %10ld%c " 301 "rttvar %10ld%c\n", 302 rt->rt_rmx.rmx_ssthresh, 303 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 304 rt->rt_rmx.rmx_rtt, 305 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 306 rt->rt_rmx.rmx_rttvar, 307 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 308 printf("\thopcount %10lu%c\n", 309 rt->rt_rmx.rmx_hopcount, 310 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 311 } 312 } 313 314 /* 315 * Print routing statistics 316 */ 317 void 318 rt_stats(off) 319 u_long off; 320 { 321 struct rtstat rtstat; 322 323 if (use_sysctl) { 324 size_t rtsize = sizeof(rtstat); 325 326 if (sysctlbyname("net.route.stats", &rtstat, &rtsize, 327 NULL, 0) == -1) 328 err(1, "rt_stats: sysctl"); 329 } else if (off == 0) { 330 printf("rtstat: symbol not in namelist\n"); 331 return; 332 } else 333 kread(off, (char *)&rtstat, sizeof (rtstat)); 334 335 printf("routing:\n"); 336 printf("\t%llu bad routing redirect%s\n", 337 (unsigned long long)rtstat.rts_badredirect, 338 plural(rtstat.rts_badredirect)); 339 printf("\t%llu dynamically created route%s\n", 340 (unsigned long long)rtstat.rts_dynamic, 341 plural(rtstat.rts_dynamic)); 342 printf("\t%llu new gateway%s due to redirects\n", 343 (unsigned long long)rtstat.rts_newgateway, 344 plural(rtstat.rts_newgateway)); 345 printf("\t%llu destination%s found unreachable\n", 346 (unsigned long long)rtstat.rts_unreach, 347 plural(rtstat.rts_unreach)); 348 printf("\t%llu use%s of a wildcard route\n", 349 (unsigned long long)rtstat.rts_wildcard, 350 plural(rtstat.rts_wildcard)); 351 } 352 353 short ns_nullh[] = {0,0,0}; 354 short ns_bh[] = {-1,-1,-1}; 355 356 char * 357 ns_print(sa) 358 struct sockaddr *sa; 359 { 360 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 361 struct ns_addr work; 362 union { 363 union ns_net net_e; 364 u_long long_e; 365 } net; 366 u_short port; 367 static char mybuf[50], cport[10], chost[25]; 368 char *host = ""; 369 char *p; 370 u_char *q; 371 372 work = sns->sns_addr; 373 port = ntohs(work.x_port); 374 work.x_port = 0; 375 net.net_e = work.x_net; 376 if (ns_nullhost(work) && net.long_e == 0) { 377 if (port ) { 378 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 379 upHex(mybuf); 380 } else 381 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 382 return (mybuf); 383 } 384 385 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 386 host = "any"; 387 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 388 host = "*"; 389 } else { 390 q = work.x_host.c_host; 391 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 392 q[0], q[1], q[2], q[3], q[4], q[5]); 393 for (p = chost; *p == '0' && p < chost + 12; p++) 394 continue; 395 host = p; 396 } 397 if (port) 398 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 399 else 400 *cport = 0; 401 402 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 403 host, cport); 404 upHex(mybuf); 405 return (mybuf); 406 } 407 408 char * 409 ns_phost(sa) 410 struct sockaddr *sa; 411 { 412 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 413 struct sockaddr_ns work; 414 static union ns_net ns_zeronet; 415 char *p; 416 417 work = *sns; 418 work.sns_addr.x_port = 0; 419 work.sns_addr.x_net = ns_zeronet; 420 421 p = ns_print((struct sockaddr *)&work); 422 if (strncmp("0H.", p, 3) == 0) 423 p += 3; 424 return (p); 425 } 426 427 void 428 upHex(p0) 429 char *p0; 430 { 431 char *p = p0; 432 433 for (; *p; p++) 434 switch (*p) { 435 case 'a': 436 case 'b': 437 case 'c': 438 case 'd': 439 case 'e': 440 case 'f': 441 *p += ('A' - 'a'); 442 } 443 } 444 445 446
Indexes created Wed Oct 15 03:09:54 GMT 2025