| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file.t |
| |
| #pragma once |
| |
| #include <stdbool.h> |
| |
| #include "mdns/mdns.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| // Returns 0 iff type is one of the supported RR_TYPE* constants. |
| bool is_valid_rr_type(uint16_t type); |
| |
| // Returns 0 iff type is one of the supported RR_CLASS* constants. |
| bool is_valid_rr_class(uint16_t clazz); |
| |
| // Appends a resource record to the list starting at rrsptr and using the given |
| // property values. Returns the number of records in the linked list after |
| // insertion. If memory cannot be allocated for the new record, a negative |
| // value is returned with errno set to ENOMEM. name is expected to be a NULL |
| // terminated string. type and clazz must be one of the RR_TYPE and RR_CLASS |
| // constants, respectively. Otherwise, a negative value is returned and errno is |
| // set to EINVAL. |
| // |
| // Returns 0 on success. |
| int mdns_add_rr(mdns_rr** rrsptr, |
| char* name, |
| uint16_t type, |
| uint16_t clazz, |
| uint8_t* rdata, |
| uint16_t rdlength, |
| uint32_t ttl); |
| |
| // Reads an mdns_message header. |
| // |
| // The header is a 12 byte chunk whose layout is as follows: |
| // |
| // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // | ID | |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // | Flags | |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // | Question Count | |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // | Answer Count | |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // | Authorities Count | |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // | Additionals Count | |
| // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| // |
| // See RFC 1035 at https://www.ietf.org/rfc/rfc1035.txt for details on the |
| // specific format header flags (bytes 16-31). |
| // |
| // Assumes the given buffer holds at least MDNS_HEADER_SIZE bytes. |
| // |
| // Always returns MDNS_HEADER_SIZE as the number of bytes read from buf, to be |
| // consistent with the style of other unmarshal* functions. |
| int unmarshal_header(const void* buf, mdns_header* container); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
