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ndisc-option: also ignore Prefix Information option with multicast address

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Fixes https://github.com/systemd/systemd/pull/32215#issuecomment-2049624693
This commit is contained in:
Yu Watanabe
2024-04-12 10:34:12 +01:00
committed by Luca Boccassi
parent dd63f00c64
commit 296afa8477
1 changed files with 3 additions and 1 deletions
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src/libsystemd-network/ndisc-option.c
+3 -1
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@@ -350,7 +350,9 @@ int ndisc_option_add_prefix_internal(
struct in6_addr addr = *address;
in6_addr_mask(&addr, prefixlen);
if (in6_addr_is_link_local(&addr) || in6_addr_is_null(&addr))
/* RFC 4861 and 4862 only state that link-local prefix should be ignored.
* But here we also ignore null and multicast addresses. */
if (in6_addr_is_link_local(&addr) || in6_addr_is_null(&addr) || in6_addr_is_multicast(&addr))
return -EINVAL;
if (preferred_lifetime > valid_lifetime)