diff options
Diffstat (limited to 'src/resolve/resolved-dns-packet.c')
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index e90500ce70..4e069ab4cb 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -171,8 +171,7 @@ DnsPacket *dns_packet_unref(DnsPacket *p) { assert(p->n_ref > 0); - if (p->more) - dns_packet_unref(p->more); + dns_packet_unref(p->more); if (p->n_ref == 1) dns_packet_free(p); @@ -1526,9 +1525,7 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, size_t *start) { goto fail; if (key->class == DNS_CLASS_ANY || - key->type == DNS_TYPE_ANY || - key->type == DNS_TYPE_AXFR || - key->type == DNS_TYPE_IXFR) { + !dns_type_is_valid_rr(key->type)) { r = -EBADMSG; goto fail; } @@ -1972,6 +1969,11 @@ int dns_packet_extract(DnsPacket *p) { if (r < 0) goto finish; + if (!dns_type_is_valid_query(key->type)) { + r = -EBADMSG; + goto finish; + } + r = dns_question_add(question, key); if (r < 0) goto finish; @@ -1994,8 +1996,18 @@ int dns_packet_extract(DnsPacket *p) { goto finish; if (rr->key->type == DNS_TYPE_OPT) { - if (p->opt) - return -EBADMSG; + + /* The OPT RR is only valid in the Additional section */ + if (i < DNS_PACKET_ANCOUNT(p) + DNS_PACKET_NSCOUNT(p)) { + r = -EBADMSG; + goto finish; + } + + /* Two OPT RRs? */ + if (p->opt) { + r = -EBADMSG; + goto finish; + } p->opt = dns_resource_record_ref(rr); } else { |