151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*
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* Copyright (c) 2004 Bruce M Simpson <bms@spc.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* Print the system's current multicast group memberships.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_mib.h>
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#include <net/if_types.h>
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#include <net/if_dl.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <err.h>
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#include <ifaddrs.h>
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#include <sysexits.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "netstat.h"
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union sockunion {
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struct sockaddr_storage ss;
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struct sockaddr sa;
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struct sockaddr_dl sdl;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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};
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typedef union sockunion sockunion_t;
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#define MYIFNAME_SIZE 128
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void
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ifmalist_dump(void)
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{
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struct ifmaddrs *ifmap, *ifma;
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sockunion_t *psa;
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char myifname[MYIFNAME_SIZE];
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char addrbuf[INET6_ADDRSTRLEN];
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char *pcolon;
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void *addr;
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char *pifname, *plladdr, *pgroup;
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if (getifmaddrs(&ifmap))
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err(EX_OSERR, "getifmaddrs");
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fputs("IPv4/IPv6 Multicast Group Memberships\n", stdout);
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fprintf(stdout, "%-20s\t%-16s\t%s\n", "Group", "Gateway", "Netif");
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for (ifma = ifmap; ifma; ifma = ifma->ifma_next) {
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if (ifma->ifma_name == NULL || ifma->ifma_addr == NULL)
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continue;
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/* Group address */
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psa = (sockunion_t *)ifma->ifma_addr;
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switch (psa->sa.sa_family) {
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case AF_INET:
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pgroup = inet_ntoa(psa->sin.sin_addr);
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break;
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case AF_INET6:
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addr = &psa->sin6.sin6_addr;
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inet_ntop(psa->sa.sa_family, addr, addrbuf,
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sizeof(addrbuf));
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pgroup = addrbuf;
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break;
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default:
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continue; /* XXX */
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}
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/* Link-layer mapping, if any */
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psa = (sockunion_t *)ifma->ifma_lladdr;
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if (psa != NULL) {
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switch (psa->sa.sa_family) {
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case AF_INET:
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plladdr = inet_ntoa(psa->sin.sin_addr);
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break;
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case AF_LINK:
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if (psa->sdl.sdl_type == IFT_ETHER)
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plladdr = ether_ntoa((struct ether_addr *)&psa->sdl.sdl_data);
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else
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plladdr = link_ntoa(&psa->sdl);
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break;
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}
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} else
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plladdr = "<none>";
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/* Interface upon which the membership exists */
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psa = (sockunion_t *)ifma->ifma_name;
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switch (psa->sa.sa_family) {
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case AF_LINK:
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strlcpy(myifname, link_ntoa(&psa->sdl),
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MYIFNAME_SIZE);
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pcolon = strchr(myifname, ':');
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if (pcolon)
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*pcolon = '\0';
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pifname = myifname;
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break;
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default:
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pifname = "";
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break;
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}
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fprintf(stdout, "%-20s\t%-16s\t%s\n", pgroup, plladdr, pifname);
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}
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freeifmaddrs(ifmap);
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}
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