| #ifndef foodnshfoo |
| #define foodnshfoo |
| |
| /* $Id: dns.h 82 2005-08-05 23:51:50Z lennart $ */ |
| |
| /*** |
| This file is part of nss-mdns. |
| |
| nss-mdns is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| nss-mdns is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with nss-mdns; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| USA. |
| ***/ |
| |
| #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 idx, uint16_t v); |
| uint16_t dns_packet_get_field(struct dns_packet *p, unsigned idx); |
| |
| 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 |
| |