usr.sbin/ifmcstat/ifmcstat.c

   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 1.8 2005/10/31 00:00:57 swildner 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 *);
  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                 KREAD(ifp, &ifnet, struct ifnet);
 138                 printf("%s:\n", if_indextoname(ifnet.if_index, ifname));
 139
 140                 if6_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
 141                 nifp = ifnet.if_link.tqe_next;
 142
 143                 /* not supported */
 144
 145                 ifp = nifp;
 146         }
 147
 148         exit(0);
 149         /*NOTREACHED*/
 150 }
 151
 152 char *
 153 ifname(struct ifnet *ifp)
 154 {
 155         static char buf[BUFSIZ];
 156         struct ifnet ifnet;
 157
 158         KREAD(ifp, &ifnet, struct ifnet);
 159         strlcpy(buf, ifnet.if_xname, sizeof(buf));
 160         return buf;
 161 }
 162
 163 void
 164 kread(u_long addr, void *buf, int len)
 165 {
 166         if (kvm_read(kvmd, addr, buf, len) != len) {
 167                 perror("kvm_read");
 168                 exit(1);
 169         }
 170 }
 171
 172 void
 173 if6_addrlist(struct ifaddr *ifap)
 174 {
 175         struct ifaddr ifa;
 176         struct sockaddr sa;
 177         struct in6_ifaddr if6a;
 178         struct in6_multi *mc = 0;
 179         struct ifaddr *ifap0;
 180
 181         ifap0 = ifap;
 182         while (ifap) {
 183                 KREAD(ifap, &ifa, struct ifaddr);
 184                 if (ifa.ifa_addr == NULL)
 185                         goto nextifap;
 186                 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
 187                 if (sa.sa_family != PF_INET6)
 188                         goto nextifap;
 189                 KREAD(ifap, &if6a, struct in6_ifaddr);
 190                 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr));
 191         nextifap:
 192                 ifap = ifa.ifa_link.tqe_next;
 193         }
 194         if (ifap0) {
 195                 struct ifnet ifnet;
 196                 struct ifmultiaddr ifm, *ifmp = 0;
 197                 struct sockaddr_in6 sin6;
 198                 struct in6_multi in6m;
 199                 struct sockaddr_dl sdl;
 200                 int in6_multilist_done = 0;
 201
 202                 KREAD(ifap0, &ifa, struct ifaddr);
 203                 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
 204                 if (ifnet.if_multiaddrs.lh_first)
 205                         ifmp = ifnet.if_multiaddrs.lh_first;
 206                 while (ifmp) {
 207                         KREAD(ifmp, &ifm, struct ifmultiaddr);
 208                         if (ifm.ifma_addr == NULL)
 209                                 goto nextmulti;
 210                         KREAD(ifm.ifma_addr, &sa, struct sockaddr);
 211                         if (sa.sa_family != AF_INET6)
 212                                 goto nextmulti;
 213                         in6_multientry((struct in6_multi *)ifm.ifma_protospec);
 214                         if (ifm.ifma_lladdr == 0)
 215                                 goto nextmulti;
 216                         KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
 217                         printf("\t\t\tmcast-macaddr %s multicnt %d\n",
 218                                ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
 219                                ifm.ifma_refcount);
 220                     nextmulti:
 221                         ifmp = ifm.ifma_link.le_next;
 222                 }
 223         }
 224 #ifdef N_IN6_MK
 225         if (nl[N_IN6_MK].n_value != 0) {
 226                 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk;
 227                 struct multi6_kludge *mkp, mk;
 228                 char *nam;
 229
 230                 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype);
 231                 KREAD(ifap0, &ifa, struct ifaddr);
 232
 233                 nam = strdup(ifname(ifa.ifa_ifp));
 234                 if (!nam) {
 235                         fprintf(stderr, "ifmcstat: not enough core\n");
 236                         exit(1);
 237                 }
 238
 239                 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) {
 240                         KREAD(mkp, &mk, struct multi6_kludge);
 241                         if (strcmp(nam, ifname(mk.mk_ifp)) == 0 &&
 242                             mk.mk_head.lh_first) {
 243                                 printf("\t(on kludge entry for %s)\n", nam);
 244                                 in6_multilist(mk.mk_head.lh_first);
 245                         }
 246                 }
 247
 248                 free(nam);
 249         }
 250 #endif
 251 }
 252
 253 struct in6_multi *
 254 in6_multientry(struct in6_multi *mc)
 255 {
 256         struct in6_multi multi;
 257
 258         KREAD(mc, &multi, struct in6_multi);
 259         printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr));
 260         printf(" refcnt %u\n", multi.in6m_refcount);
 261         return(multi.in6m_entry.le_next);
 262 }
 263
 264 void
 265 in6_multilist(struct in6_multi *mc)
 266 {
 267         while (mc)
 268                 mc = in6_multientry(mc);
 269 }