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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'> </span><span lang=EN-US style='font-family:"Arial","sans-serif"'>Hi Ross,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>We discussed several times about this subject and I would like to share what I understood from exchanges with RedHat support.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>It seems that kernel maintainers chose to keep the backward compatibility with a default that cause receiving data from all multicast groups and not only from joined multicast group.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>But they add since kernel 2.6.31 an option that allow to avoid this.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>In a test program, I tryied adding <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>#if defined(__linux__) && !defined(IP_MULTICAST_ALL)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> #warning linux is not able to filter multicast group that share same port without IP_MULTICAST_ALL option<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>#endif<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>#ifdef IP_MULTICAST_ALL<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> int mc_all = 0;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> if ((setsockopt(sock, IPPROTO_IP, IP_MULTICAST_ALL, (void*) &mc_all, sizeof(mc_all))) < 0) {<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> perror("setsockopt() failed");<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> exit(1);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> }<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>#endif<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>After this, multicast filter works “normally” (like windows & FreeBSD)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Do you think it could be possible to set this option in socketJoinGroup in a future release of live555 ?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Best Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> Michel.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><div><p class=MsoNormal><span style='mso-fareast-language:FR'>[@@ THALES GROUP INTERNAL @@]<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>