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resolved: don't let EDNS0 OPT dgram size affect TCP

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Fixes: #11884
This commit is contained in:
Lennart Poettering 2019-03-13 19:28:38 +01:00
parent aa11cab98c
commit acd74d61d2
1 changed files with 3 additions and 3 deletions
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6
src/resolve/resolved-dns-packet.h
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@ -119,12 +119,12 @@ static inline uint16_t DNS_PACKET_PAYLOAD_SIZE_MAX(DnsPacket *p) {
/* Returns the advertised maximum size for replies, or the DNS default if there's nothing defined. */
if (p->ipproto == IPPROTO_TCP) /* we ignore EDNS(0) size data on TCP, like everybody else */
return DNS_PACKET_SIZE_MAX;
if (p->opt)
return MAX(DNS_PACKET_UNICAST_SIZE_MAX, p->opt->key->class);
if (p->ipproto == IPPROTO_TCP)
return DNS_PACKET_SIZE_MAX;
return DNS_PACKET_UNICAST_SIZE_MAX;
}