diff options
Diffstat (limited to 'main/quagga/quagga-0.99.11-ipv6-only.patch')
| -rw-r--r-- | main/quagga/quagga-0.99.11-ipv6-only.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/main/quagga/quagga-0.99.11-ipv6-only.patch b/main/quagga/quagga-0.99.11-ipv6-only.patch new file mode 100644 index 00000000..53636d6b --- /dev/null +++ b/main/quagga/quagga-0.99.11-ipv6-only.patch @@ -0,0 +1,29 @@ +On Linux the default behaviour of getaddrinfo is to provide both IPV4 and IPV6 +addresses if available. But the default behaviour of binding to an IPV6 address +is to handle both the native IPV6 address and IPV4 to IPV6 mapped addresses. +Without this patch what happens is: + 1. First address is IPV6, bind succeeds. + 2. Second address is IPV4, bind fails (port already used by IPV6) + 3. incoming connections come in on IPV6 listen socket, as IPV4 mapped + addresses then BGP gets confused because of client with unexpected address. + +The fix is to force IPV6 socket as IPV6 only. + +--- a/bgpd/bgp_network.c 2008-08-27 17:59:20.000000000 -0700 ++++ b/bgpd/bgp_network.c 2008-08-27 18:02:46.000000000 -0700 +@@ -412,6 +412,15 @@ bgp_socket (struct bgp *bgp, unsigned sh + setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL); + #endif + ++#ifdef IPV6_V6ONLY ++ /* Want only IPV6 on ipv6 socket (not mapped addresses) */ ++ if (ainfo->ai_family == AF_INET6) { ++ int on = 1; ++ setsockopt (sock, IPPROTO_IPV6, IPV6_V6ONLY, ++ (void *) &on, sizeof (on)); ++ } ++#endif ++ + if (bgpd_privs.change (ZPRIVS_RAISE) ) + zlog_err ("bgp_socket: could not raise privs"); + |