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dhcp6: fix wrong length for IA_PD dhcp6 option

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Fixes an issue introduced by 73b49d433c2c8e6304c8b82538bd4231d070fce4.

When PrefixDelegationHint= is not set, dhcp6_option_append_pd() sets
wrong length for IA_PD option, as `r` is `-EINVAL`.

Fixes #19021.
This commit is contained in:
Yu Watanabe 2021-03-17 00:23:51 +09:00 committed by Lennart Poettering
parent 69bedd07c3
commit fa92d38428
1 changed files with 2 additions and 2 deletions
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4
src/libsystemd-network/dhcp6-option.c
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@ -257,9 +257,9 @@ int dhcp6_option_append_pd(uint8_t **buf, size_t *buflen, const DHCP6IA *pd, con
len += r;
}
if (hint_pd_prefix) {
if (hint_pd_prefix && hint_pd_prefix->iapdprefix.prefixlen > 0) {
r = option_append_pd_prefix(buf, buflen, hint_pd_prefix);
if (r < 0 && r != -EINVAL)
if (r < 0)
return r;
len += r;