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| author | Simon Kelley <simon@thekelleys.org.uk> | 2020-03-19 21:56:45 +0000 |
|---|---|---|
| committer | Simon Kelley <simon@thekelleys.org.uk> | 2020-03-19 21:56:45 +0000 |
| commit | 0506a5ed4e56863627c54aedad30ad61221292ef (patch) | |
| tree | 3984978364641b09b44158f294a82e96e0386ede /src/netlink.c | |
| parent | e7ee1aa0937d99b0a5942050b85708eb165e4704 (diff) | |
| download | dnsmasq-0506a5ed4e56863627c54aedad30ad61221292ef.tar.gz | |
Handle old kernels that don't do NETLINK_NO_ENOBUFS.
Deal with both old kernel header files that don't define it,
and old kernels that don't implement it.
Also generalise Linux kernel version handling.
Diffstat (limited to 'src/netlink.c')
| -rw-r--r-- | src/netlink.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/netlink.c b/src/netlink.c index a1ca5d1..3af54c4 100644 --- a/src/netlink.c +++ b/src/netlink.c @@ -27,6 +27,9 @@ #define SOL_NETLINK 270 #endif +#ifndef NETLINK_NO_ENOBUFS +#define NETLINK_NO_ENOBUFS 5 +#endif /* linux 2.6.19 buggers up the headers, patch it up here. */ #ifndef IFA_RTA @@ -79,10 +82,11 @@ void netlink_init(void) } if (daemon->netlinkfd == -1 || - setsockopt(daemon->netlinkfd, SOL_NETLINK, NETLINK_NO_ENOBUFS, &opt, sizeof(opt)) == -1 || + (daemon->kernel_version >= KERNEL_VERSION(2,6,30) && + setsockopt(daemon->netlinkfd, SOL_NETLINK, NETLINK_NO_ENOBUFS, &opt, sizeof(opt)) == -1) || getsockname(daemon->netlinkfd, (struct sockaddr *)&addr, &slen) == -1) die(_("cannot create netlink socket: %s"), NULL, EC_MISC); - + /* save pid assigned by bind() and retrieved by getsockname() */ netlink_pid = addr.nl_pid; |