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sd-ndisc: actually refuse RA message from null address

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This commit is contained in:
Yu Watanabe
2024-02-22 14:33:29 +09:00
parent e7cb80474d
commit 189eeddaec
1 changed files with 4 additions and 2 deletions
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6
src/libsystemd-network/sd-ndisc.c
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@@ -252,8 +252,10 @@ static int ndisc_recv(sd_event_source *s, int fd, uint32_t revents, void *userda
/* The function icmp6_receive() accepts the null source address, but RFC 4861 Section 6.1.2 states
* that hosts MUST discard messages with the null source address. */
if (in6_addr_is_null(&rt->address))
log_ndisc(nd, "Received RA from null address. Ignoring.");
if (in6_addr_is_null(&rt->address)) {
log_ndisc(nd, "Received an ICMPv6 packet from null address, ignoring.");
return 0;
}
(void) ndisc_handle_datagram(nd, rt);
return 0;