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| author | Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com> | 2016-12-02 15:28:14 +0200 |
|---|---|---|
| committer | Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com> | 2017-01-19 11:51:21 +0200 |
| commit | 58ab31d57fdc2b55ebe07be90aea492911b6bad5 (patch) | |
| tree | 30c7b4985fd46836246fc6f476e62c0d534f0fb5 /src/resolve/resolved-dns-packet.c | |
| parent | 53fda2bb933694c9bdb1bbf1f5583e39673b74b2 (diff) | |
| download | systemd-58ab31d57fdc2b55ebe07be90aea492911b6bad5.tar.gz | |
resolved: add cache-flush bit to answers in mDNS announcements
See the section 10.2 of RFC6762 for details.
Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
Diffstat (limited to 'src/resolve/resolved-dns-packet.c')
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index 337a8c473f..8231c21450 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -569,8 +569,9 @@ fail: return r; } -int dns_packet_append_key(DnsPacket *p, const DnsResourceKey *k, size_t *start) { +int dns_packet_append_key(DnsPacket *p, const DnsResourceKey *k, const DnsAnswerFlags flags, size_t *start) { size_t saved_size; + uint16_t class; int r; assert(p); @@ -586,7 +587,8 @@ int dns_packet_append_key(DnsPacket *p, const DnsResourceKey *k, size_t *start) if (r < 0) goto fail; - r = dns_packet_append_uint16(p, k->class, NULL); + class = flags & DNS_ANSWER_CACHE_FLUSH ? k->class | MDNS_RR_CACHE_FLUSH : k->class; + r = dns_packet_append_uint16(p, class, NULL); if (r < 0) goto fail; @@ -791,7 +793,7 @@ int dns_packet_truncate_opt(DnsPacket *p) { return 1; } -int dns_packet_append_rr(DnsPacket *p, const DnsResourceRecord *rr, size_t *start, size_t *rdata_start) { +int dns_packet_append_rr(DnsPacket *p, const DnsResourceRecord *rr, const DnsAnswerFlags flags, size_t *start, size_t *rdata_start) { size_t saved_size, rdlength_offset, end, rdlength, rds; int r; @@ -801,7 +803,7 @@ int dns_packet_append_rr(DnsPacket *p, const DnsResourceRecord *rr, size_t *star saved_size = p->size; - r = dns_packet_append_key(p, rr->key, NULL); + r = dns_packet_append_key(p, rr->key, flags, NULL); if (r < 0) goto fail; @@ -1143,7 +1145,7 @@ int dns_packet_append_question(DnsPacket *p, DnsQuestion *q) { assert(p); DNS_QUESTION_FOREACH(key, q) { - r = dns_packet_append_key(p, key, NULL); + r = dns_packet_append_key(p, key, 0, NULL); if (r < 0) return r; } @@ -1153,12 +1155,13 @@ int dns_packet_append_question(DnsPacket *p, DnsQuestion *q) { int dns_packet_append_answer(DnsPacket *p, DnsAnswer *a) { DnsResourceRecord *rr; + DnsAnswerFlags flags; int r; assert(p); - DNS_ANSWER_FOREACH(rr, a) { - r = dns_packet_append_rr(p, rr, NULL, NULL); + DNS_ANSWER_FOREACH_FLAGS(rr, flags, a) { + r = dns_packet_append_rr(p, rr, flags, NULL, NULL); if (r < 0) return r; } |