1 /* $NetBSD: ifmcstat.c,v 1.16 2014/05/30 22:20:48 joerg Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 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 <net/if.h> 43 #include <net/if_types.h> 44 #include <net/if_dl.h> 45 #include <netinet/in.h> 46 #include <net/if_ether.h> 47 #include <netinet/in_var.h> 48 #include <arpa/inet.h> 49 50 #include <netdb.h> 51 52 kvm_t *kvmd; 53 54 struct nlist nl[] = { 55 #define N_IFNET_LIST 0 56 { "_ifnet_list", 0, 0, 0, 0 }, 57 #define N_IN6_MK 1 58 { "_in6_mk", 0, 0, 0, 0 }, 59 { "", 0, 0, 0, 0 }, 60 }; 61 62 static const char *inet6_n2a(struct in6_addr *); 63 static char *ifname(struct ifnet *); 64 static void kread(u_long, void *, int); 65 static void acmc(struct ether_multi *); 66 static void if6_addrlist(struct ifaddr *); 67 static void in6_multilist(struct in6_multi *); 68 69 #define KREAD(addr, buf, type) \ 70 kread((u_long)addr, (void *)buf, sizeof(type)) 71 72 struct multi6_kludge { 73 LIST_ENTRY(multi6_kludge) mk_entry; 74 struct ifnet *mk_ifp; 75 struct in6_multihead mk_head; 76 }; 77 78 static const char * 79 inet6_n2a(struct in6_addr *p) 80 { 81 static char buf[NI_MAXHOST]; 82 struct sockaddr_in6 sin6; 83 const int niflags = NI_NUMERICHOST; 84 85 memset(&sin6, 0, sizeof(sin6)); 86 sin6.sin6_family = AF_INET6; 87 sin6.sin6_len = sizeof(struct sockaddr_in6); 88 sin6.sin6_addr = *p; 89 inet6_getscopeid(&sin6, INET6_IS_ADDR_LINKLOCAL| 90 INET6_IS_ADDR_MC_LINKLOCAL); 91 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 92 buf, sizeof(buf), NULL, 0, niflags) == 0) 93 return buf; 94 else 95 return "(invalid)"; 96 } 97 98 int 99 main(void) 100 { 101 char buf[_POSIX2_LINE_MAX], ifnam[IFNAMSIZ]; 102 struct ifnet *ifp, *nifp, ifnet; 103 struct ethercom ec; 104 union { 105 struct sockaddr_storage st; 106 struct sockaddr_dl sdl; 107 } su; 108 struct sockaddr_dl *sdlp; 109 sdlp = &su.sdl; 110 111 if ((kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, buf)) == NULL) { 112 perror("kvm_openfiles"); 113 exit(1); 114 } 115 if (kvm_nlist(kvmd, nl) < 0) { 116 perror("kvm_nlist"); 117 exit(1); 118 } 119 if (nl[N_IFNET_LIST].n_value == 0) { 120 printf("symbol %s not found\n", nl[N_IFNET_LIST].n_name); 121 exit(1); 122 } 123 KREAD(nl[N_IFNET_LIST].n_value, &ifp, struct ifnet *); 124 while (ifp) { 125 KREAD(ifp, &ifnet, struct ifnet); 126 printf("%s:\n", if_indextoname(ifnet.if_index, ifnam)); 127 128 if6_addrlist(ifnet.if_addrlist.tqh_first); 129 nifp = ifnet.if_list.tqe_next; 130 131 KREAD(ifnet.if_sadl, sdlp, struct sockaddr_dl); 132 if (sdlp->sdl_type == IFT_ETHER) { 133 /* If we didn't get all of it, try again */ 134 if (sdlp->sdl_len > sizeof(struct sockaddr_dl)) 135 kread((u_long)ifnet.if_sadl, (void *)sdlp, sdlp->sdl_len); 136 printf("\tenaddr %s", 137 ether_ntoa((struct ether_addr *)LLADDR(sdlp))); 138 KREAD(ifp, &ec, struct ethercom); 139 printf(" multicnt %d", ec.ec_multicnt); 140 acmc(ec.ec_multiaddrs.lh_first); 141 printf("\n"); 142 } 143 144 ifp = nifp; 145 } 146 147 exit(0); 148 /*NOTREACHED*/ 149 } 150 151 static char * 152 ifname(struct ifnet *ifp) 153 { 154 static char buf[BUFSIZ]; 155 struct ifnet ifnet; 156 157 KREAD(ifp, &ifnet, struct ifnet); 158 strncpy(buf, ifnet.if_xname, BUFSIZ); 159 return buf; 160 } 161 162 static void 163 kread(u_long addr, void *buf, int len) 164 { 165 if (kvm_read(kvmd, addr, buf, len) != len) { 166 perror("kvm_read"); 167 exit(1); 168 } 169 } 170 171 static void 172 acmc(struct ether_multi *am) 173 { 174 struct ether_multi em; 175 176 while (am) { 177 KREAD(am, &em, struct ether_multi); 178 179 printf("\n\t\t"); 180 printf("%s -- ", ether_ntoa((struct ether_addr *)em.enm_addrlo)); 181 printf("%s ", ether_ntoa((struct ether_addr *)&em.enm_addrhi)); 182 printf("%d", em.enm_refcount); 183 am = em.enm_list.le_next; 184 } 185 } 186 187 static void 188 if6_addrlist(struct ifaddr *ifap) 189 { 190 struct ifaddr ifa; 191 struct sockaddr sa; 192 struct in6_ifaddr if6a; 193 struct in6_multi *mc = 0; 194 struct ifaddr *ifap0; 195 196 ifap0 = ifap; 197 while (ifap) { 198 KREAD(ifap, &ifa, struct ifaddr); 199 if (ifa.ifa_addr == NULL) 200 goto nextifap; 201 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 202 if (sa.sa_family != PF_INET6) 203 goto nextifap; 204 KREAD(ifap, &if6a, struct in6_ifaddr); 205 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr)); 206 mc = mc ? mc : if6a.ia6_multiaddrs.lh_first; 207 nextifap: 208 ifap = ifa.ifa_list.tqe_next; 209 } 210 if (mc) 211 in6_multilist(mc); 212 if (nl[N_IN6_MK].n_value != 0) { 213 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk; 214 struct multi6_kludge *mkp, mk; 215 char *nam; 216 217 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype); 218 KREAD(ifap0, &ifa, struct ifaddr); 219 220 nam = strdup(ifname(ifa.ifa_ifp)); 221 222 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) { 223 KREAD(mkp, &mk, struct multi6_kludge); 224 if (strcmp(nam, ifname(mk.mk_ifp)) == 0 && 225 mk.mk_head.lh_first) { 226 printf("\t(on kludge entry for %s)\n", nam); 227 in6_multilist(mk.mk_head.lh_first); 228 } 229 } 230 231 free(nam); 232 } 233 } 234 235 static void 236 in6_multilist(struct in6_multi *mc) 237 { 238 struct in6_multi multi; 239 240 while (mc) { 241 KREAD(mc, &multi, struct in6_multi); 242 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr)); 243 printf(" refcnt %u\n", multi.in6m_refcount); 244 mc = multi.in6m_entry.le_next; 245 } 246 } 247