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 #include <stdio.h> 33 #include <stdlib.h> 34 #include <fcntl.h> 35 #include <kvm.h> 36 #include <nlist.h> 37 #include <string.h> 38 #include <limits.h> 39 40 #include <sys/types.h> 41 #include <sys/socket.h> 42 #include <sys/queue.h> 43 44 #include <net/if.h> 45 #include <net/if_var.h> 46 #include <net/if_types.h> 47 #include <net/if_dl.h> 48 #include <netinet/in.h> 49 #define _KERNEL 50 #include <netinet/if_ether.h> 51 #undef _KERNEL 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 { "_ifnet" }, 62 { "" }, 63 }; 64 65 const char *inet6_n2a __P((struct in6_addr *)); 66 int main __P((void)); 67 char *ifname __P((struct ifnet *)); 68 void kread __P((u_long, void *, int)); 69 void if6_addrlist __P((struct ifaddr *)); 70 void in6_multilist __P((struct in6_multi *)); 71 struct in6_multi * in6_multientry __P((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 *inet6_n2a(p) 85 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 main() 116 { 117 char buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ]; 118 struct ifnet *ifp, *nifp, ifnet; 119 struct arpcom arpcom; 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 KREAD(ifp, &ifnet, struct ifnet); 136 printf("%s:\n", if_indextoname(ifnet.if_index, ifname)); 137 138 if6_addrlist(TAILQ_FIRST(&ifnet.if_addrhead)); 139 nifp = ifnet.if_link.tqe_next; 140 141 /* not supported */ 142 143 ifp = nifp; 144 } 145 146 exit(0); 147 /*NOTREACHED*/ 148 } 149 150 char *ifname(ifp) 151 struct ifnet *ifp; 152 { 153 static char buf[BUFSIZ]; 154 struct ifnet ifnet; 155 char ifnamebuf[IFNAMSIZ]; 156 157 KREAD(ifp, &ifnet, struct ifnet); 158 KREAD(ifnet.if_name, ifnamebuf, sizeof(ifnamebuf)); 159 snprintf(buf, sizeof(buf), "%s%d", ifnamebuf, 160 ifnet.if_unit); /* does snprintf allow overlap copy?? */ 161 return buf; 162 } 163 164 void kread(addr, buf, len) 165 u_long addr; 166 void *buf; 167 int len; 168 { 169 if (kvm_read(kvmd, addr, buf, len) != len) { 170 perror("kvm_read"); 171 exit(1); 172 } 173 } 174 175 void 176 if6_addrlist(ifap) 177 struct ifaddr *ifap; 178 { 179 struct ifaddr ifa; 180 struct sockaddr sa; 181 struct in6_ifaddr if6a; 182 struct in6_multi *mc = 0; 183 struct ifaddr *ifap0; 184 185 ifap0 = ifap; 186 while (ifap) { 187 KREAD(ifap, &ifa, struct ifaddr); 188 if (ifa.ifa_addr == NULL) 189 goto nextifap; 190 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 191 if (sa.sa_family != PF_INET6) 192 goto nextifap; 193 KREAD(ifap, &if6a, struct in6_ifaddr); 194 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr)); 195 nextifap: 196 ifap = ifa.ifa_link.tqe_next; 197 } 198 if (ifap0) { 199 struct ifnet ifnet; 200 struct ifmultiaddr ifm, *ifmp = 0; 201 struct sockaddr_in6 sin6; 202 struct in6_multi in6m; 203 struct sockaddr_dl sdl; 204 int in6_multilist_done = 0; 205 206 KREAD(ifap0, &ifa, struct ifaddr); 207 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 208 if (ifnet.if_multiaddrs.lh_first) 209 ifmp = ifnet.if_multiaddrs.lh_first; 210 while (ifmp) { 211 KREAD(ifmp, &ifm, struct ifmultiaddr); 212 if (ifm.ifma_addr == NULL) 213 goto nextmulti; 214 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 215 if (sa.sa_family != AF_INET6) 216 goto nextmulti; 217 (void)in6_multientry((struct in6_multi *) 218 ifm.ifma_protospec); 219 if (ifm.ifma_lladdr == 0) 220 goto nextmulti; 221 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl); 222 printf("\t\t\tmcast-macaddr %s multicnt %d\n", 223 ether_ntoa((struct ether_addr *)LLADDR(&sdl)), 224 ifm.ifma_refcount); 225 nextmulti: 226 ifmp = ifm.ifma_link.le_next; 227 } 228 } 229 #ifdef N_IN6_MK 230 if (nl[N_IN6_MK].n_value != 0) { 231 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk; 232 struct multi6_kludge *mkp, mk; 233 char *nam; 234 235 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype); 236 KREAD(ifap0, &ifa, struct ifaddr); 237 238 nam = strdup(ifname(ifa.ifa_ifp)); 239 if (!nam) { 240 fprintf(stderr, "ifmcstat: not enough core\n"); 241 exit(1); 242 } 243 244 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) { 245 KREAD(mkp, &mk, struct multi6_kludge); 246 if (strcmp(nam, ifname(mk.mk_ifp)) == 0 && 247 mk.mk_head.lh_first) { 248 printf("\t(on kludge entry for %s)\n", nam); 249 in6_multilist(mk.mk_head.lh_first); 250 } 251 } 252 253 free(nam); 254 } 255 #endif 256 } 257 258 struct in6_multi * 259 in6_multientry(mc) 260 struct in6_multi *mc; 261 { 262 struct in6_multi multi; 263 264 KREAD(mc, &multi, struct in6_multi); 265 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr)); 266 printf(" refcnt %u\n", multi.in6m_refcount); 267 return(multi.in6m_entry.le_next); 268 } 269 270 void 271 in6_multilist(mc) 272 struct in6_multi *mc; 273 { 274 while (mc) 275 mc = in6_multientry(mc); 276 } 277