route.c revision 1.78.2.2
1 /* $NetBSD: route.c,v 1.78.2.2 2014/05/22 11:42:46 yamt 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 1.78.2.2 2014/05/22 11:42:46 yamt Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdbool.h> 42 #include <sys/param.h> 43 #include <sys/protosw.h> 44 #include <sys/socket.h> 45 #include <sys/mbuf.h> 46 #include <sys/un.h> 47 48 #include <net/if.h> 49 #include <net/if_dl.h> 50 #include <net/if_types.h> 51 #include <net/route.h> 52 #include <netinet/in.h> 53 #include <netatalk/at.h> 54 #include <netmpls/mpls.h> 55 56 #include <sys/sysctl.h> 57 58 #include <arpa/inet.h> 59 60 #include <err.h> 61 #include <kvm.h> 62 #include <netdb.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 68 #include "netstat.h" 69 70 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d))) 71 72 /* 73 * XXX we put all of the sockaddr types in here to force the alignment 74 * to be correct. 75 */ 76 static union sockaddr_union { 77 struct sockaddr u_sa; 78 struct sockaddr_in u_in; 79 struct sockaddr_un u_un; 80 struct sockaddr_at u_at; 81 struct sockaddr_dl u_dl; 82 u_short u_data[128]; 83 int u_dummy; /* force word-alignment */ 84 } pt_u; 85 86 int do_rtent = 0; 87 struct rtentry rtentry; 88 struct radix_node rnode; 89 struct radix_mask rmask; 90 91 static struct sockaddr *kgetsa(const struct sockaddr *); 92 static void p_tree(struct radix_node *); 93 static void p_rtnode(void); 94 static void p_krtentry(struct rtentry *); 95 96 /* 97 * Print routing tables. 98 */ 99 void 100 routepr(u_long rtree) 101 { 102 struct radix_node_head *rnh, head; 103 struct radix_node_head *rt_nodes[AF_MAX+1]; 104 int i; 105 106 printf("Routing tables\n"); 107 108 if (rtree == 0) { 109 printf("rt_tables: symbol not in namelist\n"); 110 return; 111 } 112 113 kget(rtree, rt_nodes); 114 for (i = 0; i <= AF_MAX; i++) { 115 if ((rnh = rt_nodes[i]) == 0) 116 continue; 117 kget(rnh, head); 118 if (i == AF_UNSPEC) { 119 if (Aflag && (af == 0 || af == 0xff)) { 120 printf("Netmasks:\n"); 121 p_tree(head.rnh_treetop); 122 } 123 } else if (af == AF_UNSPEC || af == i) { 124 pr_family(i); 125 do_rtent = 1; 126 pr_rthdr(i, Aflag); 127 p_tree(head.rnh_treetop); 128 } 129 } 130 } 131 132 static struct sockaddr * 133 kgetsa(const struct sockaddr *dst) 134 { 135 136 kget(dst, pt_u.u_sa); 137 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 138 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 139 return (&pt_u.u_sa); 140 } 141 142 static void 143 p_tree(struct radix_node *rn) 144 { 145 146 again: 147 kget(rn, rnode); 148 if (rnode.rn_b < 0) { 149 if (Aflag) 150 printf("%-8.8lx ", (u_long) rn); 151 if (rnode.rn_flags & RNF_ROOT) { 152 if (Aflag) 153 printf("(root node)%s", 154 rnode.rn_dupedkey ? " =>\n" : "\n"); 155 } else if (do_rtent) { 156 kget(rn, rtentry); 157 p_krtentry(&rtentry); 158 if (Aflag) 159 p_rtnode(); 160 } else { 161 p_sockaddr(kgetsa((const struct sockaddr *)rnode.rn_key), 162 NULL, 0, 44); 163 putchar('\n'); 164 } 165 if ((rn = rnode.rn_dupedkey) != NULL) 166 goto again; 167 } else { 168 if (Aflag && do_rtent) { 169 printf("%-8.8lx ", (u_long) rn); 170 p_rtnode(); 171 } 172 rn = rnode.rn_r; 173 p_tree(rnode.rn_l); 174 p_tree(rn); 175 } 176 } 177 178 static void 179 p_rtnode(void) 180 { 181 struct radix_mask *rm = rnode.rn_mklist; 182 char nbuf[20]; 183 184 if (rnode.rn_b < 0) { 185 if (rnode.rn_mask) { 186 printf("\t mask "); 187 p_sockaddr(kgetsa((const struct sockaddr *)rnode.rn_mask), 188 NULL, 0, -1); 189 } else if (rm == 0) 190 return; 191 } else { 192 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 193 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 194 (u_long) rnode.rn_r); 195 } 196 while (rm) { 197 kget(rm, rmask); 198 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 199 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 200 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 201 if (rmask.rm_flags & RNF_NORMAL) { 202 struct radix_node rnode_aux; 203 printf(" <normal>, "); 204 kget(rmask.rm_leaf, rnode_aux); 205 p_sockaddr(kgetsa((const struct sockaddr *)rnode_aux.rn_mask), 206 NULL, 0, -1); 207 } else 208 p_sockaddr(kgetsa((const struct sockaddr *)rmask.rm_mask), 209 NULL, 0, -1); 210 putchar('}'); 211 if ((rm = rmask.rm_mklist) != NULL) 212 printf(" ->"); 213 } 214 putchar('\n'); 215 } 216 217 static struct sockaddr *sockcopy(struct sockaddr *, union sockaddr_union *); 218 219 /* 220 * copy a sockaddr into an allocated region, allocate at least sockaddr 221 * bytes and zero unused 222 */ 223 static struct sockaddr * 224 sockcopy(struct sockaddr *sp, union sockaddr_union *dp) 225 { 226 int len; 227 228 if (sp == 0 || sp->sa_len == 0) 229 (void)memset(dp, 0, sizeof (*sp)); 230 else { 231 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 232 (void)memcpy(dp, sp, len); 233 } 234 return ((struct sockaddr *)dp); 235 } 236 237 static void 238 p_krtentry(struct rtentry *rt) 239 { 240 static struct ifnet ifnet, *lastif; 241 union sockaddr_union addr_un, mask_un; 242 struct sockaddr *addr, *mask; 243 244 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 245 return; 246 247 memset(&addr_un, 0, sizeof(addr_un)); 248 memset(&mask_un, 0, sizeof(mask_un)); 249 addr = sockcopy(kgetsa(rt_getkey(rt)), &addr_un); 250 if (rt_mask(rt)) 251 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 252 else 253 mask = sockcopy(NULL, &mask_un); 254 p_addr(addr, mask, rt->rt_flags); 255 p_gwaddr(kgetsa(rt->rt_gateway), kgetsa(rt->rt_gateway)->sa_family); 256 p_flags(rt->rt_flags, "%-6.6s "); 257 printf("%6d %8"PRIu64" ", rt->rt_refcnt, rt->rt_use); 258 if (rt->rt_rmx.rmx_mtu) 259 printf("%6"PRIu64, rt->rt_rmx.rmx_mtu); 260 else 261 printf("%6s", "-"); 262 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 263 if (tagflag == 1) { 264 if (rt->rt_tag != NULL) { 265 const struct sockaddr *tagsa = kgetsa(rt->rt_tag); 266 char *tagstr; 267 268 if (tagsa->sa_family == AF_MPLS) { 269 tagstr = mpls_ntoa(tagsa); 270 if (strlen(tagstr) < 7) 271 printf("%7s", tagstr); 272 else 273 printf("%s", tagstr); 274 } 275 else 276 printf("%7s", "-"); 277 } else 278 printf("%7s", "-"); 279 } 280 if (rt->rt_ifp) { 281 if (rt->rt_ifp != lastif) { 282 kget(rt->rt_ifp, ifnet); 283 lastif = rt->rt_ifp; 284 } 285 printf(" %.16s%s", ifnet.if_xname, 286 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 287 } 288 putchar('\n'); 289 if (vflag) 290 pr_rtrmx(&rt->rt_rmx); 291 } 292 293 void 294 pr_rtrmx(struct rt_metrics *rmx) 295 { 296 printf("\texpire %10"PRId64"%c recvpipe %10"PRIu64"%c " 297 "sendpipe %10"PRIu64"%c\n", 298 (int64_t)rmx->rmx_expire, 299 (rmx->rmx_locks & RTV_EXPIRE) ? 'L' : ' ', rmx->rmx_recvpipe, 300 (rmx->rmx_locks & RTV_RPIPE) ? 'L' : ' ', rmx->rmx_sendpipe, 301 (rmx->rmx_locks & RTV_SPIPE) ? 'L' : ' '); 302 printf("\tssthresh %10"PRIu64"%c rtt %10"PRIu64"%c " 303 "rttvar %10"PRIu64"%c\n", rmx->rmx_ssthresh, 304 (rmx->rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 305 rmx->rmx_rtt, (rmx->rmx_locks & RTV_RTT) ? 'L' : ' ', 306 rmx->rmx_rttvar, (rmx->rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 307 printf("\thopcount %10"PRIu64"%c\n", 308 rmx->rmx_hopcount, (rmx->rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 309 } 310 311 /* 312 * Print routing statistics 313 */ 314 void 315 rt_stats(u_long off) 316 { 317 struct rtstat rtstats; 318 319 if (use_sysctl) { 320 size_t rtsize = sizeof(rtstats); 321 322 if (sysctlbyname("net.route.stats", &rtstats, &rtsize, 323 NULL, 0) == -1) 324 err(1, "rt_stats: sysctl"); 325 } else if (off == 0) { 326 printf("rtstat: symbol not in namelist\n"); 327 return; 328 } else 329 kread(off, (char *)&rtstats, sizeof(rtstats)); 330 331 printf("routing:\n"); 332 printf("\t%llu bad routing redirect%s\n", 333 (unsigned long long)rtstats.rts_badredirect, 334 plural(rtstats.rts_badredirect)); 335 printf("\t%llu dynamically created route%s\n", 336 (unsigned long long)rtstats.rts_dynamic, 337 plural(rtstats.rts_dynamic)); 338 printf("\t%llu new gateway%s due to redirects\n", 339 (unsigned long long)rtstats.rts_newgateway, 340 plural(rtstats.rts_newgateway)); 341 printf("\t%llu destination%s found unreachable\n", 342 (unsigned long long)rtstats.rts_unreach, 343 plural(rtstats.rts_unreach)); 344 printf("\t%llu use%s of a wildcard route\n", 345 (unsigned long long)rtstats.rts_wildcard, 346 plural(rtstats.rts_wildcard)); 347 } 348
Indexes created Wed Oct 15 03:09:54 GMT 2025