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 */ 31 32 #define _KERNEL_STRUCTURES 33 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <fcntl.h> 37 #include <kvm.h> 38 #include <nlist.h> 39 #include <string.h> 40 #include <limits.h> 41 42 #include <sys/types.h> 43 #include <sys/socket.h> 44 #include <sys/queue.h> 45 46 #include <net/if.h> 47 #include <net/if_var.h> 48 #include <net/if_types.h> 49 #include <net/if_dl.h> 50 #include <netinet/in.h> 51 #include <netinet/if_ether.h> 52 #include <netinet/in_var.h> 53 #include <arpa/inet.h> 54 55 #include <netdb.h> 56 57 kvm_t *kvmd; 58 59 struct nlist nl[] = { 60 #define N_IFNET 0 61 { .n_name = "_ifnet" }, 62 { .n_name = "" }, 63 }; 64 65 const char *inet6_n2a(struct in6_addr *); 66 int main(int, char **); 67 char *ifname(struct ifnet *); 68 void kread(u_long, void *, int); 69 void if6_addrlist(struct ifaddr_container *); 70 void in6_multilist(struct in6_multi *); 71 struct in6_multi * in6_multientry(struct in6_multi *); 72 73 #define KREAD(addr, buf, type) \ 74 kread((u_long)addr, (void *)buf, sizeof(type)) 75 76 #ifdef N_IN6_MK 77 struct multi6_kludge { 78 LIST_ENTRY(multi6_kludge) mk_entry; 79 struct ifnet *mk_ifp; 80 struct in6_multihead mk_head; 81 }; 82 #endif 83 84 const char * 85 inet6_n2a(struct in6_addr *p) 86 { 87 static char buf[NI_MAXHOST]; 88 struct sockaddr_in6 sin6; 89 u_int32_t scopeid; 90 #ifdef NI_WITHSCOPEID 91 const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID; 92 #else 93 const int niflags = NI_NUMERICHOST; 94 #endif 95 96 memset(&sin6, 0, sizeof(sin6)); 97 sin6.sin6_family = AF_INET6; 98 sin6.sin6_len = sizeof(struct sockaddr_in6); 99 sin6.sin6_addr = *p; 100 if (IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MC_LINKLOCAL(p)) { 101 scopeid = ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 102 if (scopeid) { 103 sin6.sin6_scope_id = scopeid; 104 sin6.sin6_addr.s6_addr[2] = 0; 105 sin6.sin6_addr.s6_addr[3] = 0; 106 } 107 } 108 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 109 buf, sizeof(buf), NULL, 0, niflags) == 0) 110 return buf; 111 else 112 return "(invalid)"; 113 } 114 115 int 116 main(int argc __unused, char **argv __unused) 117 { 118 char buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ]; 119 struct ifnet *ifp, *nifp, ifnet; 120 121 if ((kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, buf)) == NULL) { 122 perror("kvm_openfiles"); 123 exit(1); 124 } 125 if (kvm_nlist(kvmd, nl) < 0) { 126 perror("kvm_nlist"); 127 exit(1); 128 } 129 if (nl[N_IFNET].n_value == 0) { 130 printf("symbol %s not found\n", nl[N_IFNET].n_name); 131 exit(1); 132 } 133 KREAD(nl[N_IFNET].n_value, &ifp, struct ifnet *); 134 while (ifp) { 135 struct ifaddrhead head; 136 struct ifaddr_container ifac, *ifacp = NULL; 137 138 KREAD(ifp, &ifnet, struct ifnet); 139 printf("%s:\n", if_indextoname(ifnet.if_index, ifname)); 140 141 KREAD(ifnet.if_addrheads, &head, struct ifaddrhead); 142 if (TAILQ_FIRST(&head) != NULL) { 143 KREAD(TAILQ_FIRST(&head), &ifac, 144 struct ifaddr_container); 145 ifacp = &ifac; 146 } 147 148 if6_addrlist(ifacp); 149 nifp = ifnet.if_link.tqe_next; 150 151 /* not supported */ 152 153 ifp = nifp; 154 } 155 156 exit(0); 157 /*NOTREACHED*/ 158 } 159 160 char * 161 ifname(struct ifnet *ifp) 162 { 163 static char buf[BUFSIZ]; 164 struct ifnet ifnet; 165 166 KREAD(ifp, &ifnet, struct ifnet); 167 strlcpy(buf, ifnet.if_xname, sizeof(buf)); 168 return buf; 169 } 170 171 void 172 kread(u_long addr, void *buf, int len) 173 { 174 if (kvm_read(kvmd, addr, buf, len) != len) { 175 perror("kvm_read"); 176 exit(1); 177 } 178 } 179 180 void 181 if6_addrlist(struct ifaddr_container *ifac) 182 { 183 struct ifaddr *ifap; 184 struct ifaddr ifa; 185 struct sockaddr sa; 186 struct in6_ifaddr if6a; 187 struct ifaddr *ifap0; 188 189 if (ifac != NULL) 190 ifap = ifac->ifa; 191 else 192 ifap = NULL; 193 194 ifap0 = ifap; 195 while (ifap) { 196 KREAD(ifap, &ifa, struct ifaddr); 197 if (ifa.ifa_addr == NULL) 198 goto nextifap; 199 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 200 if (sa.sa_family != PF_INET6) 201 goto nextifap; 202 KREAD(ifap, &if6a, struct in6_ifaddr); 203 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr)); 204 nextifap: 205 if (TAILQ_NEXT(ifac, ifa_link) == NULL) { 206 ifap = NULL; 207 } else { 208 KREAD(TAILQ_NEXT(ifac, ifa_link), ifac, 209 struct ifaddr_container); 210 ifap = ifac->ifa; 211 } 212 } 213 if (ifap0) { 214 struct ifnet ifnet; 215 struct ifmultiaddr ifm, *ifmp = 0; 216 struct sockaddr_dl sdl; 217 218 KREAD(ifap0, &ifa, struct ifaddr); 219 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 220 if (TAILQ_FIRST(&ifnet.if_multiaddrs)) 221 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs); 222 while (ifmp) { 223 KREAD(ifmp, &ifm, struct ifmultiaddr); 224 if (ifm.ifma_addr == NULL) 225 goto nextmulti; 226 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 227 if (sa.sa_family != AF_INET6) 228 goto nextmulti; 229 in6_multientry((struct in6_multi *)ifm.ifma_protospec); 230 if (ifm.ifma_lladdr == 0) 231 goto nextmulti; 232 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl); 233 printf("\t\t\tmcast-macaddr %s multicnt %d\n", 234 ether_ntoa((struct ether_addr *)LLADDR(&sdl)), 235 ifm.ifma_refcount); 236 nextmulti: 237 ifmp = TAILQ_NEXT(&ifm, ifma_link); 238 } 239 } 240 #ifdef N_IN6_MK 241 if (nl[N_IN6_MK].n_value != 0) { 242 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk; 243 struct multi6_kludge *mkp, mk; 244 char *nam; 245 246 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype); 247 KREAD(ifap0, &ifa, struct ifaddr); 248 249 nam = strdup(ifname(ifa.ifa_ifp)); 250 if (!nam) { 251 fprintf(stderr, "ifmcstat: not enough core\n"); 252 exit(1); 253 } 254 255 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) { 256 KREAD(mkp, &mk, struct multi6_kludge); 257 if (strcmp(nam, ifname(mk.mk_ifp)) == 0 && 258 mk.mk_head.lh_first) { 259 printf("\t(on kludge entry for %s)\n", nam); 260 in6_multilist(mk.mk_head.lh_first); 261 } 262 } 263 264 free(nam); 265 } 266 #endif 267 } 268 269 struct in6_multi * 270 in6_multientry(struct in6_multi *mc) 271 { 272 struct in6_multi multi; 273 274 KREAD(mc, &multi, struct in6_multi); 275 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr)); 276 printf(" refcnt %u\n", multi.in6m_refcount); 277 return(multi.in6m_entry.le_next); 278 } 279 280 void 281 in6_multilist(struct in6_multi *mc) 282 { 283 while (mc) 284 mc = in6_multientry(mc); 285 } 286