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In the early days of ripd, we supported running RIP on secondary IP addresses. To do that, everytime we needed to send a multicast packet, we would create a new temporary socket for each of the interface's addresses and call bind() to change the source IP of the outgoing packets. The problem with these temporary sockets is that they are more specific than the global RIP socket (bound to INADDR_ANY). Then, even though these sockets only exist for a short amount of time, they can receive some RIP packets that were supposed to be received on the global RIP socket. And since we never read from the temporary sockets, these packets are dropped. Since we don't support secondary addresses anymore, the simplest way to fix this problem is to stop using temporary sockets for sending multicast packets. We are already setting IP_MULTICAST_IF before sending each multicast packet, and in this case the primary address of the selected interface is used as the source IP of the outgoing packets, which is exactly what we want. If we decide to reintroduce support for secondary addresses in the future, we should try one of the following: * Use IP_SENDSRCADDR/IP_PKTINFO to set the source address of the outgoing multicast packets; * Create one permanent UDP socket for each possible interface address, and enable reading on all sockets. Fixes the following IxANVL RIP tests: 7.10 and 14.1. Signed-off-by: Renato Westphal <renato@opensourcerouting.org> |
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| cumulus | ||
| debian | ||
| doc | ||
| fpm | ||
| gdb | ||
| init | ||
| isisd | ||
| ldpd | ||
| lib | ||
| m4 | ||
| ospf6d | ||
| ospfclient | ||
| ospfd | ||
| pimd | ||
| pkgsrc | ||
| ports | ||
| qpb | ||
| redhat | ||
| ripd | ||
| ripngd | ||
| solaris | ||
| tests | ||
| tools | ||
| vtysh | ||
| watchquagga | ||
| zebra | ||
| .gitignore | ||
| AUTHORS | ||
| bootstrap.sh | ||
| buildtest.sh | ||
| ChangeLog | ||
| common.am | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| HACKING.md | ||
| HACKING.pending | ||
| INSTALL.quagga.txt | ||
| Makefile.am | ||
| NEWS | ||
| README | ||
| README.NetBSD | ||
| REPORTING-BUGS | ||
| SERVICES | ||
| stamp-h.in | ||
| TODO | ||
| update-autotools | ||
Quagga is free software that manages various IPv4 and IPv6 routing protocols. Currently Quagga supports BGP4, BGP4+, OSPFv2, OSPFv3, RIPv1, RIPv2, and RIPng as well as very early support for IS-IS. See the file INSTALL.quagga.txt for building and installation instructions. See the file REPORTING-BUGS to report bugs. Quagga is free software. See the file COPYING for copying conditions.