diff options
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 12 | ||||
| -rw-r--r-- | src/resolve/resolved-dns-rr.h | 4 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index 3a4482a1b7..35d1fb02be 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -1421,6 +1421,7 @@ fail: int dns_packet_read_key(DnsPacket *p, DnsResourceKey **ret, size_t *start) { _cleanup_free_ char *name = NULL; + bool cache_flush = false; uint16_t class, type; DnsResourceKey *key; size_t saved_rindex; @@ -1443,12 +1444,23 @@ int dns_packet_read_key(DnsPacket *p, DnsResourceKey **ret, size_t *start) { if (r < 0) goto fail; + if (p->protocol == DNS_PROTOCOL_MDNS) { + /* See RFC6762, Section 10.2 */ + + if (class & MDNS_RR_CACHE_FLUSH) { + class &= ~MDNS_RR_CACHE_FLUSH; + cache_flush = true; + } + } + key = dns_resource_key_new_consume(class, type, name); if (!key) { r = -ENOMEM; goto fail; } + key->cache_flush = cache_flush; + name = NULL; *ret = key; diff --git a/src/resolve/resolved-dns-rr.h b/src/resolve/resolved-dns-rr.h index b82fa77562..5cbb927681 100644 --- a/src/resolve/resolved-dns-rr.h +++ b/src/resolve/resolved-dns-rr.h @@ -45,6 +45,9 @@ enum { #define DNSKEY_FLAG_ZONE_KEY (UINT16_C(1) << 8) #define DNSKEY_FLAG_SEP (UINT16_C(1) << 0) +/* mDNS RR flags */ +#define MDNS_RR_CACHE_FLUSH (UINT16_C(1) << 15) + /* DNSSEC algorithm identifiers, see * http://tools.ietf.org/html/rfc4034#appendix-A.1 and * https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml */ @@ -76,6 +79,7 @@ struct DnsResourceKey { unsigned n_ref; uint16_t class, type; char *_name; /* don't access directy, use DNS_RESOURCE_KEY_NAME()! */ + bool cache_flush:1; }; /* Creates a temporary resource key. This is only useful to quickly |