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network: refuse 169.254.0.0/24 and 169.254.255.0/24 for IPv4LLStartAddress=

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Follow-up for #23927.
This commit is contained in:
Yu Watanabe
2022-07-15 03:37:09 +09:00
parent c1dd250f18
commit d3efcd2def
5 changed files with 24 additions and 18 deletions
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src/libsystemd-network/sd-ipv4ll.c
+1 -10
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@@ -212,21 +212,12 @@ int sd_ipv4ll_is_running(sd_ipv4ll *ll) {
return sd_ipv4acd_is_running(ll->acd);
}
static bool ipv4ll_address_is_valid(const struct in_addr *address) {
assert(address);
if (!in4_addr_is_link_local(address))
return false;
return !IN_SET(be32toh(address->s_addr) & 0x0000FF00U, 0x0000U, 0xFF00U);
}
int sd_ipv4ll_set_address(sd_ipv4ll *ll, const struct in_addr *address) {
int r;
assert_return(ll, -EINVAL);
assert_return(address, -EINVAL);
assert_return(ipv4ll_address_is_valid(address), -EINVAL);
assert_return(in4_addr_is_link_local_dynamic(address), -EINVAL);
r = sd_ipv4acd_set_address(ll->acd, address);
if (r < 0)