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Set NETLINK_NO_ENOBUFS in netlink socket, to avoid POLLERR returns.

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Simon Kelley
2020-03-10 23:55:18 +00:00
parent b837c4528d
commit 1627d577af
1 changed files with 8 additions and 0 deletions
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8
src/netlink.c
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@@ -22,6 +22,12 @@
#include <linux/netlink.h> #include <linux/netlink.h>
#include <linux/rtnetlink.h> #include <linux/rtnetlink.h>
/* Blergh. Radv does this, so that's our excuse. */
#ifndef SOL_NETLINK
#define SOL_NETLINK 270
#endif
/* linux 2.6.19 buggers up the headers, patch it up here. */ /* linux 2.6.19 buggers up the headers, patch it up here. */
#ifndef IFA_RTA #ifndef IFA_RTA
# define IFA_RTA(r) \ # define IFA_RTA(r) \
@@ -44,6 +50,7 @@ void netlink_init(void)
{ {
struct sockaddr_nl addr; struct sockaddr_nl addr;
socklen_t slen = sizeof(addr); socklen_t slen = sizeof(addr);
int opt = 1;
addr.nl_family = AF_NETLINK; addr.nl_family = AF_NETLINK;
addr.nl_pad = 0; addr.nl_pad = 0;
@@ -72,6 +79,7 @@ void netlink_init(void)
} }
if (daemon->netlinkfd == -1 || if (daemon->netlinkfd == -1 ||
setsockopt(daemon->netlinkfd, SOL_NETLINK, NETLINK_NO_ENOBUFS, &opt, sizeof(opt)) == -1 ||
getsockname(daemon->netlinkfd, (struct sockaddr *)&addr, &slen) == -1) getsockname(daemon->netlinkfd, (struct sockaddr *)&addr, &slen) == -1)
die(_("cannot create netlink socket: %s"), NULL, EC_MISC); die(_("cannot create netlink socket: %s"), NULL, EC_MISC);