1 /* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/usr.sbin/ifmcstat/ifmcstat.c,v 1.3.2.2 2001/07/03 11:02:06 ume Exp $ 30 * $DragonFly: src/usr.sbin/ifmcstat/ifmcstat.c,v 1.9 2008/03/07 11:34:21 sephe Exp $ 31 */ 32 33 #define _KERNEL_STRUCTURES 34 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <fcntl.h> 38 #include <kvm.h> 39 #include <nlist.h> 40 #include <string.h> 41 #include <limits.h> 42 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 #include <sys/queue.h> 46 47 #include <net/if.h> 48 #include <net/if_var.h> 49 #include <net/if_types.h> 50 #include <net/if_dl.h> 51 #include <netinet/in.h> 52 #include <netinet/if_ether.h> 53 #include <netinet/in_var.h> 54 #include <arpa/inet.h> 55 56 #include <netdb.h> 57 58 kvm_t *kvmd; 59 60 struct nlist nl[] = { 61 #define N_IFNET 0 62 { "_ifnet" }, 63 { "" }, 64 }; 65 66 const char *inet6_n2a(struct in6_addr *); 67 int main(int, char **); 68 char *ifname(struct ifnet *); 69 void kread(u_long, void *, int); 70 void if6_addrlist(struct ifaddr_container *); 71 void in6_multilist(struct in6_multi *); 72 struct in6_multi * in6_multientry(struct in6_multi *); 73 74 #define KREAD(addr, buf, type) \ 75 kread((u_long)addr, (void *)buf, sizeof(type)) 76 77 #ifdef N_IN6_MK 78 struct multi6_kludge { 79 LIST_ENTRY(multi6_kludge) mk_entry; 80 struct ifnet *mk_ifp; 81 struct in6_multihead mk_head; 82 }; 83 #endif 84 85 const char * 86 inet6_n2a(struct in6_addr *p) 87 { 88 static char buf[NI_MAXHOST]; 89 struct sockaddr_in6 sin6; 90 u_int32_t scopeid; 91 #ifdef NI_WITHSCOPEID 92 const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID; 93 #else 94 const int niflags = NI_NUMERICHOST; 95 #endif 96 97 memset(&sin6, 0, sizeof(sin6)); 98 sin6.sin6_family = AF_INET6; 99 sin6.sin6_len = sizeof(struct sockaddr_in6); 100 sin6.sin6_addr = *p; 101 if (IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MC_LINKLOCAL(p)) { 102 scopeid = ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 103 if (scopeid) { 104 sin6.sin6_scope_id = scopeid; 105 sin6.sin6_addr.s6_addr[2] = 0; 106 sin6.sin6_addr.s6_addr[3] = 0; 107 } 108 } 109 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 110 buf, sizeof(buf), NULL, 0, niflags) == 0) 111 return buf; 112 else 113 return "(invalid)"; 114 } 115 116 int 117 main(int argc __unused, char **argv __unused) 118 { 119 char buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ]; 120 struct ifnet *ifp, *nifp, ifnet; 121 struct arpcom arpcom; 122 123 if ((kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, buf)) == NULL) { 124 perror("kvm_openfiles"); 125 exit(1); 126 } 127 if (kvm_nlist(kvmd, nl) < 0) { 128 perror("kvm_nlist"); 129 exit(1); 130 } 131 if (nl[N_IFNET].n_value == 0) { 132 printf("symbol %s not found\n", nl[N_IFNET].n_name); 133 exit(1); 134 } 135 KREAD(nl[N_IFNET].n_value, &ifp, struct ifnet *); 136 while (ifp) { 137 struct ifaddrhead head; 138 struct ifaddr_container ifac, *ifacp = NULL; 139 140 KREAD(ifp, &ifnet, struct ifnet); 141 printf("%s:\n", if_indextoname(ifnet.if_index, ifname)); 142 143 KREAD(ifnet.if_addrheads, &head, struct ifaddrhead); 144 if (TAILQ_FIRST(&head) != NULL) { 145 KREAD(TAILQ_FIRST(&head), &ifac, 146 struct ifaddr_container); 147 ifacp = &ifac; 148 } 149 150 if6_addrlist(ifacp); 151 nifp = ifnet.if_link.tqe_next; 152 153 /* not supported */ 154 155 ifp = nifp; 156 } 157 158 exit(0); 159 /*NOTREACHED*/ 160 } 161 162 char * 163 ifname(struct ifnet *ifp) 164 { 165 static char buf[BUFSIZ]; 166 struct ifnet ifnet; 167 168 KREAD(ifp, &ifnet, struct ifnet); 169 strlcpy(buf, ifnet.if_xname, sizeof(buf)); 170 return buf; 171 } 172 173 void 174 kread(u_long addr, void *buf, int len) 175 { 176 if (kvm_read(kvmd, addr, buf, len) != len) { 177 perror("kvm_read"); 178 exit(1); 179 } 180 } 181 182 void 183 if6_addrlist(struct ifaddr_container *ifac) 184 { 185 struct ifaddr *ifap; 186 struct ifaddr ifa; 187 struct sockaddr sa; 188 struct in6_ifaddr if6a; 189 struct in6_multi *mc = 0; 190 struct ifaddr *ifap0; 191 192 if (ifac != NULL) 193 ifap = ifac->ifa; 194 else 195 ifap = NULL; 196 197 ifap0 = ifap; 198 while (ifap) { 199 KREAD(ifap, &ifa, struct ifaddr); 200 if (ifa.ifa_addr == NULL) 201 goto nextifap; 202 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 203 if (sa.sa_family != PF_INET6) 204 goto nextifap; 205 KREAD(ifap, &if6a, struct in6_ifaddr); 206 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr)); 207 nextifap: 208 if (TAILQ_NEXT(ifac, ifa_link) == NULL) { 209 ifap = NULL; 210 } else { 211 KREAD(TAILQ_NEXT(ifac, ifa_link), ifac, 212 struct ifaddr_container); 213 ifap = ifac->ifa; 214 } 215 } 216 if (ifap0) { 217 struct ifnet ifnet; 218 struct ifmultiaddr ifm, *ifmp = 0; 219 struct sockaddr_in6 sin6; 220 struct in6_multi in6m; 221 struct sockaddr_dl sdl; 222 int in6_multilist_done = 0; 223 224 KREAD(ifap0, &ifa, struct ifaddr); 225 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 226 if (TAILQ_FIRST(&ifnet.if_multiaddrs)) 227 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs); 228 while (ifmp) { 229 KREAD(ifmp, &ifm, struct ifmultiaddr); 230 if (ifm.ifma_addr == NULL) 231 goto nextmulti; 232 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 233 if (sa.sa_family != AF_INET6) 234 goto nextmulti; 235 in6_multientry((struct in6_multi *)ifm.ifma_protospec); 236 if (ifm.ifma_lladdr == 0) 237 goto nextmulti; 238 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl); 239 printf("\t\t\tmcast-macaddr %s multicnt %d\n", 240 ether_ntoa((struct ether_addr *)LLADDR(&sdl)), 241 ifm.ifma_refcount); 242 nextmulti: 243 ifmp = TAILQ_NEXT(&ifm, ifma_link); 244 } 245 } 246 #ifdef N_IN6_MK 247 if (nl[N_IN6_MK].n_value != 0) { 248 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk; 249 struct multi6_kludge *mkp, mk; 250 char *nam; 251 252 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype); 253 KREAD(ifap0, &ifa, struct ifaddr); 254 255 nam = strdup(ifname(ifa.ifa_ifp)); 256 if (!nam) { 257 fprintf(stderr, "ifmcstat: not enough core\n"); 258 exit(1); 259 } 260 261 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) { 262 KREAD(mkp, &mk, struct multi6_kludge); 263 if (strcmp(nam, ifname(mk.mk_ifp)) == 0 && 264 mk.mk_head.lh_first) { 265 printf("\t(on kludge entry for %s)\n", nam); 266 in6_multilist(mk.mk_head.lh_first); 267 } 268 } 269 270 free(nam); 271 } 272 #endif 273 } 274 275 struct in6_multi * 276 in6_multientry(struct in6_multi *mc) 277 { 278 struct in6_multi multi; 279 280 KREAD(mc, &multi, struct in6_multi); 281 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr)); 282 printf(" refcnt %u\n", multi.in6m_refcount); 283 return(multi.in6m_entry.le_next); 284 } 285 286 void 287 in6_multilist(struct in6_multi *mc) 288 { 289 while (mc) 290 mc = in6_multientry(mc); 291 } 292