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| author | Lennart Poettering <lennart@poettering.net> | 2015-12-29 19:04:35 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-12-29 21:42:09 +0100 |
| commit | f3abbe25403444688e1a1a23b9dbcc9aeefc0507 (patch) | |
| tree | 73b4781e0110c91b0c6f6398f4e23e56436ae15d | |
| parent | 0d0b52d79c2e9a79aeff9a9cca877de8b4fcbd16 (diff) | |
resolved: parse EDNS0 rcode extension bits
| -rw-r--r-- | src/resolve/resolved-dns-packet.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h index a09ace5b75..6821be73e4 100644 --- a/src/resolve/resolved-dns-packet.h +++ b/src/resolve/resolved-dns-packet.h @@ -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, |