diff options
| author | Lennart Poettering <lennart@poettering.net> | 2004-12-05 17:33:51 +0000 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2004-12-05 17:33:51 +0000 |
| commit | 8d4fd94fc8332b23f757443841a5c19c104a9bb8 (patch) | |
| tree | 4763b4cdbdd13f28efbe07ebfc0486536713c577 /src/dns.h | |
| parent | a3b571996ea5cb0227b36a20f3fc0986f7ab1b7d (diff) | |
move source files to src/
git-svn-id: file:///home/lennart/svn/public/nss-mdns/trunk@51 0ee8848e-81ea-0310-a63a-f631d1a40d77
Diffstat (limited to 'src/dns.h')
| -rw-r--r-- | src/dns.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/dns.h b/src/dns.h new file mode 100644 index 0000000..9ffb5ba --- /dev/null +++ b/src/dns.h @@ -0,0 +1,59 @@ +#ifndef foodnshfoo +#define foodnshfoo + +#include <sys/types.h> +#include <inttypes.h> + +struct dns_packet { + size_t size, rindex; + uint8_t data[9000]; +}; + +struct dns_packet* dns_packet_new(void); +void dns_packet_free(struct dns_packet *p); +void dns_packet_set_field(struct dns_packet *p, unsigned index, uint16_t v); +uint16_t dns_packet_get_field(struct dns_packet *p, unsigned index); + +uint8_t *dns_packet_append_uint16(struct dns_packet *p, uint16_t v); +uint8_t *dns_packet_append_name(struct dns_packet *p, const char *name); +uint8_t *dns_packet_append_name_compressed(struct dns_packet *p, const char *name, uint8_t *prev); +uint8_t *dns_packet_extend(struct dns_packet *p, size_t l); +int dns_packet_check_valid_response(struct dns_packet *p); +int dns_packet_check_valid(struct dns_packet *p); + +int dns_packet_consume_name(struct dns_packet *p, char *ret_name, size_t l); +int dns_packet_consume_uint16(struct dns_packet *p, uint16_t *ret_v); +int dns_packet_consume_uint32(struct dns_packet *p, uint32_t *ret_v); +int dns_packet_consume_bytes(struct dns_packet *p, void *ret_data, size_t l); +int dns_packet_consume_seek(struct dns_packet *p, size_t length); + +#define DNS_TYPE_A 0x01 +#define DNS_TYPE_AAAA 0x1C +#define DNS_TYPE_PTR 0x0C +#define DNS_CLASS_IN 0x01 + +#define DNS_FIELD_ID 0 +#define DNS_FIELD_FLAGS 1 +#define DNS_FIELD_QDCOUNT 2 +#define DNS_FIELD_ANCOUNT 3 +#define DNS_FIELD_NSCOUNT 4 +#define DNS_FIELD_ARCOUNT 5 + +#define DNS_FLAG_QR (1 << 15) +#define DNS_FLAG_OPCODE (15 << 11) +#define DNS_FLAG_RCODE (15) + +#define DNS_FLAGS(qr, opcode, aa, tc, rd, ra, z, ad, cd, rcode) \ + (((uint16_t) !!qr << 15) | \ + ((uint16_t) (opcode & 15) << 11) | \ + ((uint16_t) !!aa << 10) | \ + ((uint16_t) !!tc << 9) | \ + ((uint16_t) !!rd << 8) | \ + ((uint16_t) !!ra << 7) | \ + ((uint16_t) !!ad << 5) | \ + ((uint16_t) !!cd << 4) | \ + ((uint16_t) (rd & 15))) + + +#endif + |