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 #include "opt_inet.h" 30 #include "opt_inet6.h" 31 32 #include <sys/ctype.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/mbuf.h> 37 #include <sys/socket.h> 38 #include <sys/sysctl.h> 39 #include <sys/syslog.h> 40 #include <sys/kernel.h> 41 #include <sys/lock.h> 42 #include <sys/rmlock.h> 43 44 #include <ddb/ddb.h> 45 #include <ddb/db_lex.h> 46 47 #include <net/if.h> 48 #include <net/if_var.h> 49 #include <net/if_private.h> 50 #include <net/if_dl.h> 51 #include <net/route.h> 52 #include <net/route/nhop.h> 53 #include <net/route/route_ctl.h> 54 #include <net/route/route_var.h> 55 56 /* 57 * Unfortunately, RTF_ values are expressed as raw masks rather than powers of 58 * 2, so we cannot use them as nice C99 initializer indices below. 59 */ 60 static const char * const rtf_flag_strings[] = { 61 "UP", 62 "GATEWAY", 63 "HOST", 64 "REJECT", 65 "DYNAMIC", 66 "MODIFIED", 67 "DONE", 68 "UNUSED_0x80", 69 "UNUSED_0x100", 70 "XRESOLVE", 71 "LLDATA", 72 "STATIC", 73 "BLACKHOLE", 74 "UNUSED_0x2000", 75 "PROTO2", 76 "PROTO1", 77 "UNUSED_0x10000", 78 "UNUSED_0x20000", 79 "PROTO3", 80 "FIXEDMTU", 81 "PINNED", 82 "LOCAL", 83 "BROADCAST", 84 "MULTICAST", 85 /* Big gap. */ 86 [28] = "STICKY", 87 [30] = "RNH_LOCKED", 88 [31] = "GWFLAG_COMPAT", 89 }; 90 91 static const char * __pure 92 rt_flag_name(unsigned idx) 93 { 94 if (idx >= nitems(rtf_flag_strings)) 95 return ("INVALID_FLAG"); 96 if (rtf_flag_strings[idx] == NULL) 97 return ("UNKNOWN"); 98 return (rtf_flag_strings[idx]); 99 } 100 101 static void 102 rt_dumpaddr_ddb(const char *name, const struct sockaddr *sa) 103 { 104 char buf[INET6_ADDRSTRLEN], *res; 105 106 res = NULL; 107 if (sa == NULL) 108 res = "NULL"; 109 else if (sa->sa_family == AF_INET) { 110 res = inet_ntop(AF_INET, 111 &((const struct sockaddr_in *)sa)->sin_addr, 112 buf, sizeof(buf)); 113 } else if (sa->sa_family == AF_INET6) { 114 res = inet_ntop(AF_INET6, 115 &((const struct sockaddr_in6 *)sa)->sin6_addr, 116 buf, sizeof(buf)); 117 } else if (sa->sa_family == AF_LINK) { 118 res = "on link"; 119 } 120 121 if (res != NULL) { 122 db_printf("%s <%s> ", name, res); 123 return; 124 } 125 126 db_printf("%s <af:%d> ", name, sa->sa_family); 127 } 128 129 static int 130 rt_dumpentry_ddb(struct radix_node *rn, void *arg __unused) 131 { 132 struct sockaddr_storage ss; 133 struct rtentry *rt; 134 struct nhop_object *nh; 135 int flags, idx; 136 137 /* If RNTORT is important, put it in a header. */ 138 rt = (void *)rn; 139 nh = (struct nhop_object *)rt->rt_nhop; 140 141 rt_dumpaddr_ddb("dst", rt_key(rt)); 142 rt_dumpaddr_ddb("gateway", &rt->rt_nhop->gw_sa); 143 rt_dumpaddr_ddb("netmask", rtsock_fix_netmask(rt_key(rt), rt_mask(rt), 144 &ss)); 145 if ((nh->nh_ifp->if_flags & IFF_DYING) == 0) { 146 rt_dumpaddr_ddb("ifp", nh->nh_ifp->if_addr->ifa_addr); 147 rt_dumpaddr_ddb("ifa", nh->nh_ifa->ifa_addr); 148 } 149 150 db_printf("flags "); 151 flags = rt->rte_flags | nhop_get_rtflags(nh); 152 if (flags == 0) 153 db_printf("none"); 154 155 while ((idx = ffs(flags)) > 0) { 156 idx--; 157 158 db_printf("%s", rt_flag_name(idx)); 159 flags &= ~(1ul << idx); 160 if (flags != 0) 161 db_printf(","); 162 } 163 164 db_printf("\n"); 165 return (0); 166 } 167 168 DB_SHOW_COMMAND(routetable, db_show_routetable) 169 { 170 struct rib_head *rnh; 171 int error, i, lim; 172 173 if (have_addr) 174 i = lim = addr; 175 else { 176 i = 1; 177 lim = AF_MAX; 178 } 179 180 for (; i <= lim; i++) { 181 rnh = rt_tables_get_rnh(0, i); 182 if (rnh == NULL) { 183 if (have_addr) { 184 db_printf("%s: AF %d not supported?\n", 185 __func__, i); 186 break; 187 } 188 continue; 189 } 190 191 if (!have_addr && i > 1) 192 db_printf("\n"); 193 194 db_printf("Route table for AF %d%s%s%s:\n", i, 195 (i == AF_INET || i == AF_INET6) ? " (" : "", 196 (i == AF_INET) ? "INET" : (i == AF_INET6) ? "INET6" : "", 197 (i == AF_INET || i == AF_INET6) ? ")" : ""); 198 199 error = rnh->rnh_walktree(&rnh->head, rt_dumpentry_ddb, NULL); 200 if (error != 0) 201 db_printf("%s: walktree(%d): %d\n", __func__, i, 202 error); 203 } 204 } 205 206 DB_SHOW_COMMAND_FLAGS(route, db_show_route, CS_OWN) 207 { 208 char abuf[INET6_ADDRSTRLEN], *buf, *end; 209 struct rib_head *rh; 210 struct radix_node *rn; 211 void *dst_addrp; 212 struct rtentry *rt; 213 union { 214 struct sockaddr_in dest_sin; 215 struct sockaddr_in6 dest_sin6; 216 } u; 217 int af; 218 219 buf = db_get_line(); 220 221 /* Remove whitespaces from both ends */ 222 end = buf + strlen(buf) - 1; 223 for (; (end >= buf) && (*end=='\n' || isspace(*end)); end--) 224 *end = '\0'; 225 while (isspace(*buf)) 226 buf++; 227 228 /* Determine AF */ 229 if (strchr(buf, ':') != NULL) { 230 af = AF_INET6; 231 u.dest_sin6.sin6_family = af; 232 u.dest_sin6.sin6_len = sizeof(struct sockaddr_in6); 233 dst_addrp = &u.dest_sin6.sin6_addr; 234 } else { 235 af = AF_INET; 236 u.dest_sin.sin_family = af; 237 u.dest_sin.sin_len = sizeof(struct sockaddr_in); 238 dst_addrp = &u.dest_sin.sin_addr; 239 } 240 241 if (inet_pton(af, buf, dst_addrp) != 1) 242 goto usage; 243 244 if (inet_ntop(af, dst_addrp, abuf, sizeof(abuf)) != NULL) 245 db_printf("Looking up route to destination '%s'\n", abuf); 246 247 rt = NULL; 248 CURVNET_SET(vnet0); 249 250 rh = rt_tables_get_rnh(RT_DEFAULT_FIB, af); 251 252 rn = rh->rnh_matchaddr(&u, &rh->head); 253 if (rn && ((rn->rn_flags & RNF_ROOT) == 0)) 254 rt = (struct rtentry *)rn; 255 256 CURVNET_RESTORE(); 257 258 if (rt == NULL) { 259 db_printf("Could not get route for that server.\n"); 260 return; 261 } 262 263 rt_dumpentry_ddb((void *)rt, NULL); 264 265 return; 266 usage: 267 db_printf("Usage: 'show route <address>'\n" 268 " Currently accepts only IPv4 and IPv6 addresses\n"); 269 db_skip_to_eol(); 270 } 271