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 1.4 2003/11/03 19:31:37 eirikn 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(void); 68 char *ifname(struct ifnet *); 69 void kread(u_long, void *, int); 70 void if6_addrlist(struct ifaddr *); 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 *inet6_n2a(p) 86 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 main() 117 { 118 char buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ]; 119 struct ifnet *ifp, *nifp, ifnet; 120 struct arpcom arpcom; 121 122 if ((kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, buf)) == NULL) { 123 perror("kvm_openfiles"); 124 exit(1); 125 } 126 if (kvm_nlist(kvmd, nl) < 0) { 127 perror("kvm_nlist"); 128 exit(1); 129 } 130 if (nl[N_IFNET].n_value == 0) { 131 printf("symbol %s not found\n", nl[N_IFNET].n_name); 132 exit(1); 133 } 134 KREAD(nl[N_IFNET].n_value, &ifp, struct ifnet *); 135 while (ifp) { 136 KREAD(ifp, &ifnet, struct ifnet); 137 printf("%s:\n", if_indextoname(ifnet.if_index, ifname)); 138 139 if6_addrlist(TAILQ_FIRST(&ifnet.if_addrhead)); 140 nifp = ifnet.if_link.tqe_next; 141 142 /* not supported */ 143 144 ifp = nifp; 145 } 146 147 exit(0); 148 /*NOTREACHED*/ 149 } 150 151 char *ifname(ifp) 152 struct ifnet *ifp; 153 { 154 static char buf[BUFSIZ]; 155 struct ifnet ifnet; 156 char ifnamebuf[IFNAMSIZ]; 157 158 KREAD(ifp, &ifnet, struct ifnet); 159 KREAD(ifnet.if_name, ifnamebuf, sizeof(ifnamebuf)); 160 snprintf(buf, sizeof(buf), "%s%d", ifnamebuf, 161 ifnet.if_unit); /* does snprintf allow overlap copy?? */ 162 return buf; 163 } 164 165 void kread(addr, buf, len) 166 u_long addr; 167 void *buf; 168 int len; 169 { 170 if (kvm_read(kvmd, addr, buf, len) != len) { 171 perror("kvm_read"); 172 exit(1); 173 } 174 } 175 176 void 177 if6_addrlist(ifap) 178 struct ifaddr *ifap; 179 { 180 struct ifaddr ifa; 181 struct sockaddr sa; 182 struct in6_ifaddr if6a; 183 struct in6_multi *mc = 0; 184 struct ifaddr *ifap0; 185 186 ifap0 = ifap; 187 while (ifap) { 188 KREAD(ifap, &ifa, struct ifaddr); 189 if (ifa.ifa_addr == NULL) 190 goto nextifap; 191 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 192 if (sa.sa_family != PF_INET6) 193 goto nextifap; 194 KREAD(ifap, &if6a, struct in6_ifaddr); 195 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr)); 196 nextifap: 197 ifap = ifa.ifa_link.tqe_next; 198 } 199 if (ifap0) { 200 struct ifnet ifnet; 201 struct ifmultiaddr ifm, *ifmp = 0; 202 struct sockaddr_in6 sin6; 203 struct in6_multi in6m; 204 struct sockaddr_dl sdl; 205 int in6_multilist_done = 0; 206 207 KREAD(ifap0, &ifa, struct ifaddr); 208 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 209 if (ifnet.if_multiaddrs.lh_first) 210 ifmp = ifnet.if_multiaddrs.lh_first; 211 while (ifmp) { 212 KREAD(ifmp, &ifm, struct ifmultiaddr); 213 if (ifm.ifma_addr == NULL) 214 goto nextmulti; 215 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 216 if (sa.sa_family != AF_INET6) 217 goto nextmulti; 218 (void)in6_multientry((struct in6_multi *) 219 ifm.ifma_protospec); 220 if (ifm.ifma_lladdr == 0) 221 goto nextmulti; 222 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl); 223 printf("\t\t\tmcast-macaddr %s multicnt %d\n", 224 ether_ntoa((struct ether_addr *)LLADDR(&sdl)), 225 ifm.ifma_refcount); 226 nextmulti: 227 ifmp = ifm.ifma_link.le_next; 228 } 229 } 230 #ifdef N_IN6_MK 231 if (nl[N_IN6_MK].n_value != 0) { 232 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk; 233 struct multi6_kludge *mkp, mk; 234 char *nam; 235 236 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype); 237 KREAD(ifap0, &ifa, struct ifaddr); 238 239 nam = strdup(ifname(ifa.ifa_ifp)); 240 if (!nam) { 241 fprintf(stderr, "ifmcstat: not enough core\n"); 242 exit(1); 243 } 244 245 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) { 246 KREAD(mkp, &mk, struct multi6_kludge); 247 if (strcmp(nam, ifname(mk.mk_ifp)) == 0 && 248 mk.mk_head.lh_first) { 249 printf("\t(on kludge entry for %s)\n", nam); 250 in6_multilist(mk.mk_head.lh_first); 251 } 252 } 253 254 free(nam); 255 } 256 #endif 257 } 258 259 struct in6_multi * 260 in6_multientry(mc) 261 struct in6_multi *mc; 262 { 263 struct in6_multi multi; 264 265 KREAD(mc, &multi, struct in6_multi); 266 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr)); 267 printf(" refcnt %u\n", multi.in6m_refcount); 268 return(multi.in6m_entry.le_next); 269 } 270 271 void 272 in6_multilist(mc) 273 struct in6_multi *mc; 274 { 275 while (mc) 276 mc = in6_multientry(mc); 277 } 278