/*
|
* Copyright (c) 2012-2019 Belledonne Communications SARL.
|
*
|
* This file is part of belle-sip.
|
*
|
* This program is free software: you can redistribute it and/or modify
|
* it under the terms of the GNU General Public License as published by
|
* the Free Software Foundation, either version 3 of the License, or
|
* (at your option) any later version.
|
*
|
* This program 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 General Public License
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
*/
|
|
#ifndef belle_sip_resolver_h
|
#define belle_sip_resolver_h
|
|
typedef struct belle_sip_dns_srv belle_sip_dns_srv_t;
|
#define BELLE_SIP_DNS_SRV(obj) BELLE_SIP_CAST(obj,belle_sip_dns_srv_t)
|
|
typedef struct belle_sip_resolver_context belle_sip_resolver_context_t;
|
#define BELLE_SIP_RESOLVER_CONTEXT(obj) BELLE_SIP_CAST(obj,belle_sip_resolver_context_t)
|
|
typedef struct belle_sip_resolver_results belle_sip_resolver_results_t;
|
#define BELLE_SIP_RESOLVER_RESULTS(obj) BELLE_SIP_CAST(obj,belle_sip_resolver_results_t)
|
|
/**
|
* Callback prototype for asynchronous DNS SRV resolution.
|
* The srv_list contains struct dns_srv elements that must be taken and (possibly later) freed by the callee, using belle_sip_free().
|
*/
|
typedef void (*belle_sip_resolver_srv_callback_t)(void *data, const char *name, belle_sip_list_t *srv_list, uint32_t ttl);
|
|
/**
|
* Callback prototype for asynchronous DNS A and AAAA resolution.
|
* The 'results' object must be acquired (ref'd) in order for being accessed outside of the callback.
|
* The results object provides SRV records list and addrinfo list.
|
**/
|
typedef void (*belle_sip_resolver_callback_t)(void *data, belle_sip_resolver_results_t *results);
|
|
|
BELLE_SIP_BEGIN_DECLS
|
|
BELLESIP_EXPORT const char *belle_sip_dns_srv_get_target(const belle_sip_dns_srv_t *obj);
|
|
BELLESIP_EXPORT unsigned short belle_sip_dns_srv_get_priority(const belle_sip_dns_srv_t *obj);
|
|
BELLESIP_EXPORT unsigned short belle_sip_dns_srv_get_weight(const belle_sip_dns_srv_t *obj);
|
|
BELLESIP_EXPORT unsigned short belle_sip_dns_srv_get_port(const belle_sip_dns_srv_t *obj);
|
|
/**
|
* Find the belle_sip_dns_srv_t object associated with a particular addrinfo.
|
* The srv_list and the addrinfo must be the ones given by the belle_sip_resolver_callback_t callback invoked consecutively to a call
|
* to belle_sip_stack_resolve().
|
**/
|
BELLESIP_EXPORT const belle_sip_dns_srv_t * belle_sip_resolver_results_get_srv_from_addrinfo(const belle_sip_resolver_results_t *obj, const struct addrinfo *ai);
|
|
BELLESIP_EXPORT const bctbx_list_t *belle_sip_resolver_results_get_srv_records(const belle_sip_resolver_results_t *obj);
|
|
BELLESIP_EXPORT const struct addrinfo *belle_sip_resolver_results_get_addrinfos(const belle_sip_resolver_results_t *obj);
|
|
BELLESIP_EXPORT int belle_sip_resolver_results_get_ttl(const belle_sip_resolver_results_t *obj);
|
|
BELLESIP_EXPORT const char * belle_sip_resolver_results_get_name(const belle_sip_resolver_results_t *obj);
|
|
/**
|
* Asynchronously performs DNS SRV followed A/AAAA query. Automatically fallbacks to A/AAAA if SRV isn't found.
|
* @param stack the belle_sip_stack_t, used to schedule asynchronous execution.
|
* @param service the queried service ("sip", "stun", "turn"...)
|
* @param transport the queried transport ("udp", "tcp", "tls")
|
* @param name the SIP domain name
|
* @param port a port that will be filled in the addrinfo list returned by the callback, for the case where no SRV records are found.
|
* @param family address family expected in the addrinfo result list. AF_INET or AF_INET6. If AF_INET6 is used but no IPv6 records are found, the IPv4 addresses
|
* will be returned as IPv6 with v4 mapping (AI_V4MAPPED).
|
* @param cb a callback function that will be called to notify the results.
|
* @param data a user pointer passed through the callback as first argument.
|
* @return a #belle_sip_resolver_context_t that can be used to cancel the resolution if needed. The context must have been ref'd with belle_sip_object_ref().
|
**/
|
BELLESIP_EXPORT belle_sip_resolver_context_t * belle_sip_stack_resolve(belle_sip_stack_t *stack, const char *service, const char *transport, const char *name, int port, int family,
|
belle_sip_resolver_callback_t cb, void *data);
|
|
/**
|
* Asynchronously performs DNS A or AAAA query.
|
* @param stack the belle_sip_stack_t, used to schedule asynchronous execution.
|
* @param name the SIP domain name
|
* @param port a port that will be filled in the addrinfo list returned by the callback, for the case where no SRV records are found.
|
* @param family address family expected in the addrinfo result list. AF_INET or AF_INET6. If AF_INET6 is used but no IPv4 records are found, the IPv4 addresses
|
* will be returned as IPv6 with v4 mapping (AI_V4MAPPED).
|
* @param cb a callback function that will be called to notify the results.
|
* @param data a user pointer passed through the callback as first argument.
|
* @return a #belle_sip_resolver_context_t that can be used to cancel the resolution if needed. The context must have been ref'd with belle_sip_object_ref().
|
**/
|
BELLESIP_EXPORT belle_sip_resolver_context_t * belle_sip_stack_resolve_a(belle_sip_stack_t *stack, const char *name, int port, int family, belle_sip_resolver_callback_t cb, void *data);
|
|
/**
|
* Asynchronously performs DNS SRV query.
|
* @return a #belle_sip_resolver_context_t that can be used to cancel the resolution if needed. The context must have been ref'd with belle_sip_object_ref().
|
**/
|
BELLESIP_EXPORT belle_sip_resolver_context_t * belle_sip_stack_resolve_srv(belle_sip_stack_t *stack, const char *service, const char *transport, const char *name, belle_sip_resolver_srv_callback_t cb, void *data);
|
|
/**
|
* Cancel a pending asynchronous DNS query. The context is unref'd automatically, as a result the context shall no longer be used after this call.
|
* If the query is already performed, cancellation has no effect, but context is unref'd anyway.
|
**/
|
BELLESIP_EXPORT void belle_sip_resolver_context_cancel(belle_sip_resolver_context_t *ctx);
|
|
/**
|
* Lookups the source address from local interface that can be used to connect to a destination address.
|
* local_port is only used to be assigned into the result source address.
|
* This function always puts something in src and srclen (the loopback address) even if anything fails.
|
* The return code is 0 if successful, or -errno if an error was encoutered. Typical error is -ENETUNREACH when IPv6 network is not reachable.
|
**/
|
BELLESIP_EXPORT int belle_sip_get_src_addr_for(const struct sockaddr *dest, socklen_t destlen, struct sockaddr *src, socklen_t *srclen, int local_port);
|
|
|
BELLE_SIP_END_DECLS
|
|
|
#endif
|