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| author | Tom Gundersen <teg@jklm.no> | 2015-11-19 01:23:24 +0100 |
|---|---|---|
| committer | Tom Gundersen <teg@jklm.no> | 2015-11-19 01:25:40 +0100 |
| commit | 3ccd316353532ff60326e91153677c308c032ecb (patch) | |
| tree | f061178b11059bae8233c6341ee2b058e9ae678f /src/libsystemd-network/sd-ndisc.c | |
| parent | 81ec9ce4a71e44c29231d813b8847ebafc11b36e (diff) | |
sd-ndisc: drop RA packets from non-link-local addresses
See https://tools.ietf.org/html/rfc4861#section-4.2. Some routers (dnsmasq) will send packets
from global addresses, which would break the default route setup, so ignore those.
This is also what the kernel does.
Diffstat (limited to 'src/libsystemd-network/sd-ndisc.c')
| -rw-r--r-- | src/libsystemd-network/sd-ndisc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libsystemd-network/sd-ndisc.c b/src/libsystemd-network/sd-ndisc.c index 6703d87bc4..3bb06f6892 100644 --- a/src/libsystemd-network/sd-ndisc.c +++ b/src/libsystemd-network/sd-ndisc.c @@ -508,6 +508,9 @@ static int ndisc_router_advertisment_recv(sd_event_source *s, int fd, uint32_t r return 0; } + if (!in_addr_is_link_local(AF_INET6, (const union in_addr_union*) &router.in6.sin6_addr)) + return 0; + if (ra->nd_ra_type != ND_ROUTER_ADVERT) return 0; |