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| author | Lennart Poettering <lennart@poettering.net> | 2015-12-29 19:00:53 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-12-29 21:42:09 +0100 |
| commit | 0d0b52d79c2e9a79aeff9a9cca877de8b4fcbd16 (patch) | |
| tree | ab975a5e83a896d8ec63137b7e0e76c86aad52e1 /src/resolve/resolved-dns-packet.c | |
| parent | 9a1f0c283bac56eb26a2fa02d62e0e9ece82f25a (diff) | |
resolved: reset RR TTL to 0, if MSB is set
RFC 2181, Section 8 suggests to treat an RR TTL with the MSB set as 0.
Implement this.
Diffstat (limited to 'src/resolve/resolved-dns-packet.c')
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index 5f79701296..b0c70d0017 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -1580,6 +1580,11 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, bool *ret_cache_fl if (r < 0) goto fail; + /* RFC 2181, Section 8, suggests to + * treat a TTL with the MSB set as a zero TTL. */ + if (rr->ttl & UINT32_C(0x80000000)) + rr->ttl = 0; + r = dns_packet_read_uint16(p, &rdlength, NULL); if (r < 0) goto fail; |