1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2019 Conrad Meyer <cem@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 #include "opt_inet.h" 31 #include "opt_inet6.h" 32 33 #include <sys/ctype.h> 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/mbuf.h> 38 #include <sys/socket.h> 39 #include <sys/sysctl.h> 40 #include <sys/syslog.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/rmlock.h> 44 45 #include <ddb/ddb.h> 46 #include <ddb/db_lex.h> 47 48 #include <net/if.h> 49 #include <net/if_var.h> 50 #include <net/if_private.h> 51 #include <net/if_dl.h> 52 #include <net/route.h> 53 #include <net/route/nhop.h> 54 #include <net/route/route_ctl.h> 55 #include <net/route/route_var.h> 56 57 /* 58 * Unfortunately, RTF_ values are expressed as raw masks rather than powers of 59 * 2, so we cannot use them as nice C99 initializer indices below. 60 */ 61 static const char * const rtf_flag_strings[] = { 62 "UP", 63 "GATEWAY", 64 "HOST", 65 "REJECT", 66 "DYNAMIC", 67 "MODIFIED", 68 "DONE", 69 "UNUSED_0x80", 70 "UNUSED_0x100", 71 "XRESOLVE", 72 "LLDATA", 73 "STATIC", 74 "BLACKHOLE", 75 "UNUSED_0x2000", 76 "PROTO2", 77 "PROTO1", 78 "UNUSED_0x10000", 79 "UNUSED_0x20000", 80 "PROTO3", 81 "FIXEDMTU", 82 "PINNED", 83 "LOCAL", 84 "BROADCAST", 85 "MULTICAST", 86 /* Big gap. */ 87 [28] = "STICKY", 88 [30] = "RNH_LOCKED", 89 [31] = "GWFLAG_COMPAT", 90 }; 91 92 static const char * __pure 93 rt_flag_name(unsigned idx) 94 { 95 if (idx >= nitems(rtf_flag_strings)) 96 return ("INVALID_FLAG"); 97 if (rtf_flag_strings[idx] == NULL) 98 return ("UNKNOWN"); 99 return (rtf_flag_strings[idx]); 100 } 101 102 static void 103 rt_dumpaddr_ddb(const char *name, const struct sockaddr *sa) 104 { 105 char buf[INET6_ADDRSTRLEN], *res; 106 107 res = NULL; 108 if (sa == NULL) 109 res = "NULL"; 110 else if (sa->sa_family == AF_INET) { 111 res = inet_ntop(AF_INET, 112 &((const struct sockaddr_in *)sa)->sin_addr, 113 buf, sizeof(buf)); 114 } else if (sa->sa_family == AF_INET6) { 115 res = inet_ntop(AF_INET6, 116 &((const struct sockaddr_in6 *)sa)->sin6_addr, 117 buf, sizeof(buf)); 118 } else if (sa->sa_family == AF_LINK) { 119 res = "on link"; 120 } 121 122 if (res != NULL) { 123 db_printf("%s <%s> ", name, res); 124 return; 125 } 126 127 db_printf("%s <af:%d> ", name, sa->sa_family); 128 } 129 130 static int 131 rt_dumpentry_ddb(struct radix_node *rn, void *arg __unused) 132 { 133 struct sockaddr_storage ss; 134 struct rtentry *rt; 135 struct nhop_object *nh; 136 int flags, idx; 137 138 /* If RNTORT is important, put it in a header. */ 139 rt = (void *)rn; 140 nh = (struct nhop_object *)rt->rt_nhop; 141 142 rt_dumpaddr_ddb("dst", rt_key(rt)); 143 rt_dumpaddr_ddb("gateway", &rt->rt_nhop->gw_sa); 144 rt_dumpaddr_ddb("netmask", rtsock_fix_netmask(rt_key(rt), rt_mask(rt), 145 &ss)); 146 if ((nh->nh_ifp->if_flags & IFF_DYING) == 0) { 147 rt_dumpaddr_ddb("ifp", nh->nh_ifp->if_addr->ifa_addr); 148 rt_dumpaddr_ddb("ifa", nh->nh_ifa->ifa_addr); 149 } 150 151 db_printf("flags "); 152 flags = rt->rte_flags | nhop_get_rtflags(nh); 153 if (flags == 0) 154 db_printf("none"); 155 156 while ((idx = ffs(flags)) > 0) { 157 idx--; 158 159 db_printf("%s", rt_flag_name(idx)); 160 flags &= ~(1ul << idx); 161 if (flags != 0) 162 db_printf(","); 163 } 164 165 db_printf("\n"); 166 return (0); 167 } 168 169 DB_SHOW_COMMAND(routetable, db_show_routetable) 170 { 171 struct rib_head *rnh; 172 int error, i, lim; 173 174 if (have_addr) 175 i = lim = addr; 176 else { 177 i = 1; 178 lim = AF_MAX; 179 } 180 181 for (; i <= lim; i++) { 182 rnh = rt_tables_get_rnh(0, i); 183 if (rnh == NULL) { 184 if (have_addr) { 185 db_printf("%s: AF %d not supported?\n", 186 __func__, i); 187 break; 188 } 189 continue; 190 } 191 192 if (!have_addr && i > 1) 193 db_printf("\n"); 194 195 db_printf("Route table for AF %d%s%s%s:\n", i, 196 (i == AF_INET || i == AF_INET6) ? " (" : "", 197 (i == AF_INET) ? "INET" : (i == AF_INET6) ? "INET6" : "", 198 (i == AF_INET || i == AF_INET6) ? ")" : ""); 199 200 error = rnh->rnh_walktree(&rnh->head, rt_dumpentry_ddb, NULL); 201 if (error != 0) 202 db_printf("%s: walktree(%d): %d\n", __func__, i, 203 error); 204 } 205 } 206 207 DB_SHOW_COMMAND_FLAGS(route, db_show_route, CS_OWN) 208 { 209 char abuf[INET6_ADDRSTRLEN], *buf, *end; 210 struct rib_head *rh; 211 struct radix_node *rn; 212 void *dst_addrp; 213 struct rtentry *rt; 214 union { 215 struct sockaddr_in dest_sin; 216 struct sockaddr_in6 dest_sin6; 217 } u; 218 int af; 219 220 buf = db_get_line(); 221 222 /* Remove whitespaces from both ends */ 223 end = buf + strlen(buf) - 1; 224 for (; (end >= buf) && (*end=='\n' || isspace(*end)); end--) 225 *end = '\0'; 226 while (isspace(*buf)) 227 buf++; 228 229 /* Determine AF */ 230 if (strchr(buf, ':') != NULL) { 231 af = AF_INET6; 232 u.dest_sin6.sin6_family = af; 233 u.dest_sin6.sin6_len = sizeof(struct sockaddr_in6); 234 dst_addrp = &u.dest_sin6.sin6_addr; 235 } else { 236 af = AF_INET; 237 u.dest_sin.sin_family = af; 238 u.dest_sin.sin_len = sizeof(struct sockaddr_in); 239 dst_addrp = &u.dest_sin.sin_addr; 240 } 241 242 if (inet_pton(af, buf, dst_addrp) != 1) 243 goto usage; 244 245 if (inet_ntop(af, dst_addrp, abuf, sizeof(abuf)) != NULL) 246 db_printf("Looking up route to destination '%s'\n", abuf); 247 248 rt = NULL; 249 CURVNET_SET(vnet0); 250 251 rh = rt_tables_get_rnh(RT_DEFAULT_FIB, af); 252 253 rn = rh->rnh_matchaddr(&u, &rh->head); 254 if (rn && ((rn->rn_flags & RNF_ROOT) == 0)) 255 rt = (struct rtentry *)rn; 256 257 CURVNET_RESTORE(); 258 259 if (rt == NULL) { 260 db_printf("Could not get route for that server.\n"); 261 return; 262 } 263 264 rt_dumpentry_ddb((void *)rt, NULL); 265 266 return; 267 usage: 268 db_printf("Usage: 'show route <address>'\n" 269 " Currently accepts only IPv4 and IPv6 addresses\n"); 270 db_skip_to_eol(); 271 } 272