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