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 1.9 2008/03/07 11:34:21 sephe 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_container *);
  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                 struct ifaddrhead head;
 138                 struct ifaddr_container ifac, *ifacp = NULL;
 139
 140                 KREAD(ifp, &ifnet, struct ifnet);
 141                 printf("%s:\n", if_indextoname(ifnet.if_index, ifname));
 142
 143                 KREAD(ifnet.if_addrheads, &head, struct ifaddrhead);
 144                 if (TAILQ_FIRST(&head) != NULL) {
 145                         KREAD(TAILQ_FIRST(&head), &ifac,
 146                               struct ifaddr_container);
 147                         ifacp = &ifac;
 148                 }
 149
 150                 if6_addrlist(ifacp);
 151                 nifp = ifnet.if_link.tqe_next;
 152
 153                 /* not supported */
 154
 155                 ifp = nifp;
 156         }
 157
 158         exit(0);
 159         /*NOTREACHED*/
 160 }
 161
 162 char *
 163 ifname(struct ifnet *ifp)
 164 {
 165         static char buf[BUFSIZ];
 166         struct ifnet ifnet;
 167
 168         KREAD(ifp, &ifnet, struct ifnet);
 169         strlcpy(buf, ifnet.if_xname, sizeof(buf));
 170         return buf;
 171 }
 172
 173 void
 174 kread(u_long addr, void *buf, int len)
 175 {
 176         if (kvm_read(kvmd, addr, buf, len) != len) {
 177                 perror("kvm_read");
 178                 exit(1);
 179         }
 180 }
 181
 182 void
 183 if6_addrlist(struct ifaddr_container *ifac)
 184 {
 185         struct ifaddr *ifap;
 186         struct ifaddr ifa;
 187         struct sockaddr sa;
 188         struct in6_ifaddr if6a;
 189         struct in6_multi *mc = 0;
 190         struct ifaddr *ifap0;
 191
 192         if (ifac != NULL)
 193                 ifap = ifac->ifa;
 194         else
 195                 ifap = NULL;
 196
 197         ifap0 = ifap;
 198         while (ifap) {
 199                 KREAD(ifap, &ifa, struct ifaddr);
 200                 if (ifa.ifa_addr == NULL)
 201                         goto nextifap;
 202                 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
 203                 if (sa.sa_family != PF_INET6)
 204                         goto nextifap;
 205                 KREAD(ifap, &if6a, struct in6_ifaddr);
 206                 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr));
 207         nextifap:
 208                 if (TAILQ_NEXT(ifac, ifa_link) == NULL) {
 209                         ifap = NULL;
 210                 } else {
 211                         KREAD(TAILQ_NEXT(ifac, ifa_link), ifac,
 212                               struct ifaddr_container);
 213                         ifap = ifac->ifa;
 214                 }
 215         }
 216         if (ifap0) {
 217                 struct ifnet ifnet;
 218                 struct ifmultiaddr ifm, *ifmp = 0;
 219                 struct sockaddr_in6 sin6;
 220                 struct in6_multi in6m;
 221                 struct sockaddr_dl sdl;
 222                 int in6_multilist_done = 0;
 223
 224                 KREAD(ifap0, &ifa, struct ifaddr);
 225                 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
 226                 if (ifnet.if_multiaddrs.lh_first)
 227                         ifmp = ifnet.if_multiaddrs.lh_first;
 228                 while (ifmp) {
 229                         KREAD(ifmp, &ifm, struct ifmultiaddr);
 230                         if (ifm.ifma_addr == NULL)
 231                                 goto nextmulti;
 232                         KREAD(ifm.ifma_addr, &sa, struct sockaddr);
 233                         if (sa.sa_family != AF_INET6)
 234                                 goto nextmulti;
 235                         in6_multientry((struct in6_multi *)ifm.ifma_protospec);
 236                         if (ifm.ifma_lladdr == 0)
 237                                 goto nextmulti;
 238                         KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
 239                         printf("\t\t\tmcast-macaddr %s multicnt %d\n",
 240                                ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
 241                                ifm.ifma_refcount);
 242                     nextmulti:
 243                         ifmp = ifm.ifma_link.le_next;
 244                 }
 245         }
 246 #ifdef N_IN6_MK
 247         if (nl[N_IN6_MK].n_value != 0) {
 248                 LIST_HEAD(in6_mktype, multi6_kludge) in6_mk;
 249                 struct multi6_kludge *mkp, mk;
 250                 char *nam;
 251
 252                 KREAD(nl[N_IN6_MK].n_value, &in6_mk, struct in6_mktype);
 253                 KREAD(ifap0, &ifa, struct ifaddr);
 254
 255                 nam = strdup(ifname(ifa.ifa_ifp));
 256                 if (!nam) {
 257                         fprintf(stderr, "ifmcstat: not enough core\n");
 258                         exit(1);
 259                 }
 260
 261                 for (mkp = in6_mk.lh_first; mkp; mkp = mk.mk_entry.le_next) {
 262                         KREAD(mkp, &mk, struct multi6_kludge);
 263                         if (strcmp(nam, ifname(mk.mk_ifp)) == 0 &&
 264                             mk.mk_head.lh_first) {
 265                                 printf("\t(on kludge entry for %s)\n", nam);
 266                                 in6_multilist(mk.mk_head.lh_first);
 267                         }
 268                 }
 269
 270                 free(nam);
 271         }
 272 #endif
 273 }
 274
 275 struct in6_multi *
 276 in6_multientry(struct in6_multi *mc)
 277 {
 278         struct in6_multi multi;
 279
 280         KREAD(mc, &multi, struct in6_multi);
 281         printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr));
 282         printf(" refcnt %u\n", multi.in6m_refcount);
 283         return(multi.in6m_entry.le_next);
 284 }
 285
 286 void
 287 in6_multilist(struct in6_multi *mc)
 288 {
 289         while (mc)
 290                 mc = in6_multientry(mc);
 291 }