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Don't send RAs on interfaces without a link-local address.

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Since the source address of the RAs must be the link-local address.
This commit is contained in:
Simon Kelley
2020-01-05 17:23:19 +00:00
parent 2a8710ac2f
commit 378fa56888
1 changed files with 4 additions and 1 deletions
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5
src/radv.c
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@@ -288,7 +288,10 @@ static void send_ra_alias(time_t now, int iface, char *iface_name, struct in6_ad
context->netid.next = &context->netid;
}
if (!iface_enumerate(AF_INET6, &parm, add_prefixes))
/* If no link-local address then we can't advertise since source address of
advertisement must be link local address: RFC 4861 para 6.1.2. */
if (!iface_enumerate(AF_INET6, &parm, add_prefixes) ||
parm.link_pref_time == 0)
return;
/* Find smallest preferred time within address classes,