Date: Wed, 19 Jul 2006 14:22:27 +0000 From: Baldur Gislason <baldur@foo.is> To: freebsd nettest <freebsd_nettest@yahoo.co.in> Cc: freebsd-net@freebsd.org Subject: Re: Testing of Multicast support on fxp and bge driver. Message-ID: <20060719142227.GE36671@gremlin.foo.is> In-Reply-To: <20060719133936.23166.qmail@web7814.mail.in.yahoo.com> References: <20060719133936.23166.qmail@web7814.mail.in.yahoo.com>
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try sysctl net.inet.icmp.bmcastecho=1
Baldur
On Wed, Jul 19, 2006 at 02:39:36PM +0100, freebsd nettest wrote:
> Hi all,
>
> I was trying to test the Multicast support of bge and fxp driver using the following user level program.
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> #include <arpa/inet.h>
> #include <unistd.h>
> //#include <net/if.h>
> #include <netinet/in.h>
> //#include <sys/types.h>
> #include <sys/socket.h>
> int
> main(int argc, char *argv[])
> {
> struct ip_mreq mreqn;
> int s;
> struct in_addr ip;
> if (argc != 3) {
> fprintf(stderr, "usage: %s <dev> <group>\n", argv[0]);
> exit(1);
> }
> if((s = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
> perror("socket");
> exit(1);
> }
> memset(&mreqn, 0, sizeof(mreqn));
> inet_aton(argv[1], &(mreqn.imr_interface));
> /* mreqn.imr_interface = ip; */
>
> if (inet_pton(AF_INET, argv[2], &mreqn.imr_multiaddr) <= 0) {
> fprintf(stderr, "%s: \"%s\" invalid group address\n", argv[0],argv[2]);
> exit(1);
> }
> if (setsockopt(s, 0, IP_ADD_MEMBERSHIP,&mreqn,sizeof mreqn) < 0) {
> perror("IP_ADD_MEMBERSHIP");
> exit(1);
> }
> printf("joined group %s on %s (pausing...)\n", argv[2], argv[1]); fflush(stdout);
> pause();
> }
>
>
> On test machine:
> [root@FBSD6-AMD]# ./a.out bge0 224.1.1.37
> joined group 224.1.1.37 on bge0 (pausing...)
>
>
> On remote machine:
> -bash-3.00# ping -i xge2 224.1.1.37
> no answer from 224.1.1.37
>
>
> The ping is failing. I tried the same test on fxp (intel interface) also. The ping to the multicast IP is not working. am I doing the correct steps? Do I need to check any firewall setting that prevent the multicast packets??
>
> Please advice, if I miss something in the testing.
>
> Thanks,
>
>
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