diff options
Diffstat (limited to 'src/resolve/resolved-dns-cache.c')
| -rw-r--r-- | src/resolve/resolved-dns-cache.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-cache.c b/src/resolve/resolved-dns-cache.c index 6124ff659c..1774ae6cb8 100644 --- a/src/resolve/resolved-dns-cache.c +++ b/src/resolve/resolved-dns-cache.c @@ -738,6 +738,7 @@ int dns_cache_export_shared_to_packet(DnsCache *cache, DnsPacket *p) { int r; assert(cache); + assert(p); HASHMAP_FOREACH(i, cache->by_key, iterator) { DnsCacheItem *j; @@ -752,6 +753,23 @@ int dns_cache_export_shared_to_packet(DnsCache *cache, DnsPacket *p) { continue; r = dns_packet_append_rr(p, j->rr, NULL, NULL); + if (r == -EMSGSIZE && p->protocol == DNS_PROTOCOL_MDNS) { + /* For mDNS, if we're unable to stuff all known answers into the given packet, + * allocate a new one, push the RR into that one and link it to the current one. + */ + + DNS_PACKET_HEADER(p)->ancount = htobe16(ancount); + ancount = 0; + + r = dns_packet_new_query(&p->more, p->protocol, 0, true); + if (r < 0) + return r; + + /* continue with new packet */ + p = p->more; + r = dns_packet_append_rr(p, j->rr, NULL, NULL); + } + if (r < 0) return r; |