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resolved: parse EDNS0 rcode extension bits

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This commit is contained in:
Lennart Poettering 2015-12-29 19:04:35 +01:00
parent 0d0b52d79c
commit f3abbe2540
1 changed files with 12 additions and 1 deletions
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13
src/resolve/resolved-dns-packet.h
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@ -119,7 +119,17 @@ static inline uint8_t* DNS_PACKET_DATA(DnsPacket *p) {
#define DNS_PACKET_RA(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 7) & 1)
#define DNS_PACKET_AD(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 5) & 1)
#define DNS_PACKET_CD(p) ((be16toh(DNS_PACKET_HEADER(p)->flags) >> 4) & 1)
#define DNS_PACKET_RCODE(p) (be16toh(DNS_PACKET_HEADER(p)->flags) & 15)
static inline uint16_t DNS_PACKET_RCODE(DnsPacket *p) {
uint16_t rcode;
if (p->opt)
rcode = (uint16_t) (p->opt->ttl >> 24);
else
rcode = 0;
return rcode | (be16toh(DNS_PACKET_HEADER(p)->flags) & 15);
}
/* LLMNR defines some bits differently */
#define DNS_PACKET_LLMNR_C(p) DNS_PACKET_AA(p)
@ -203,6 +213,7 @@ static inline bool DNS_PACKET_SHALL_CACHE(DnsPacket *p) {
return in_addr_is_localhost(p->family, &p->sender) == 0;
}
/* https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#dns-parameters-6 */
enum {
DNS_RCODE_SUCCESS = 0,
DNS_RCODE_FORMERR = 1,