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Disable IPv6 socket auto-binding to IPv4 socket

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Sometimes getaddrinfo returns IPv4 addresses before IPv6 addresses.
IPv6 sockets default to attempting to bind to IPv4 addresses too.
So if the IPv4 address is activated first, then binding to IPv6
will unneccessarily fail.

* daemon/libvirtd.c: Bind to IPv6 and IPv4 addresses separately
This commit is contained in:
Daniel P. Berrange 2009-11-11 15:19:50 +00:00
parent 3c3dffc285
commit 730fd3b022
1 changed files with 15 additions and 0 deletions
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15
daemon/libvirtd.c
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@ -615,6 +615,21 @@ remoteMakeSockets (int *fds, int max_fds, int *nfds_r, const char *node, const c
int opt = 1;
setsockopt (fds[*nfds_r], SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt);
#ifdef IPV6_V6ONLY
if (runp->ai_family == PF_INET6) {
int on = 1;
/*
* Normally on Linux an INET6 socket will bind to the INET4
* address too. If getaddrinfo returns results with INET4
* first though, this will result in INET6 binding failing.
* We can trivially cope with multiple server sockets, so
* we force it to only listen on IPv6
*/
setsockopt(fds[*nfds_r], IPPROTO_IPV6,IPV6_V6ONLY,
(void*)&on, sizeof on);
}
#endif
if (bind (fds[*nfds_r], runp->ai_addr, runp->ai_addrlen) == -1) {
if (errno != EADDRINUSE) {
VIR_ERROR(_("bind: %s"), virStrerror (errno, ebuf, sizeof ebuf));