Managing proxies

User registration is controled by LinphoneProxyConfig settings.

Each LinphoneProxyConfig object can be configured with registration informations like proxy address, user id, refresh period, and so on.

A created proxy config using linphone_proxy_config_new(), once configured, must be added to LinphoneCore using function linphone_core_add_proxy_config().

It is recommended to set a default proxy config using function linphone_core_set_default_proxy(). Once done, if proxy config has been configured with attribute enable register, next call to linphone_core_iterate() triggers SIP register.

Registration status is reported by LinphoneCoreRegistrationStateChangedCb.

This pseudo code demonstrates basic registration operations:

LinphoneProxyConfig* proxy_cfg;
/*create proxy config*/
proxy_cfg = linphone_proxy_config_new();
/*parse identity*/
LinphoneAddress *from = linphone_address_new("");
LinphoneAuthInfo *info;
if (password!=NULL){
        info=linphone_auth_info_new(linphone_address_get_username(from),NULL,"secret",NULL,NULL); /*create authentication structure from identity*/
        linphone_core_add_auth_info(lc,info); /*add authentication info to LinphoneCore*/
// configure proxy entries
linphone_proxy_config_set_identity(proxy_cfg,identity); /*set identity with user name and domain*/
const char* server_addr = linphone_address_get_domain(from); /*extract domain address from identity*/
linphone_proxy_config_set_server_addr(proxy_cfg,server_addr); /* we assume domain = proxy server address*/
linphone_proxy_config_enable_register(proxy_cfg,TRUE); /*activate registration for this proxy config*/
linphone_address_destroy(from); /*release resource*/

linphone_core_add_proxy_config(lc,proxy_cfg); /*add proxy config to linphone core*/
linphone_core_set_default_proxy(lc,proxy_cfg); /*set to default proxy*/

Registration sate call back:

static void registration_state_changed(struct _LinphoneCore *lc, LinphoneProxyConfig *cfg, LinphoneRegistrationState cstate, const char *message){
                printf("New registration state %s for user id [%s] at proxy [%s]\n"


Most of the time, registration requires authentication to succeed. LinphoneAuthInfo info must be either added to LinphoneCore using function linphone_core_add_auth_info() before LinphoneProxyConfig is added to Linphone core, or on demand from call back #LinphoneCoreAuthInfoRequestedCb.


Unregistration or any changes to LinphoneProxyConfig must be first started by a call to function linphone_proxy_config_edit() and validated by function linphone_proxy_config_done().

This pseudo code shows how to unregister a user associated to a #LinphoneProxyConfig:

LinphoneProxyConfig* proxy_cfg;
linphone_core_get_default_proxy(lc,&proxy_cfg); /* get default proxy config*/
linphone_proxy_config_edit(proxy_cfg); /*start editing proxy configuration*/
linphone_proxy_config_enable_register(proxy_cfg,FALSE); /*de-activate registration for this proxy config*/
linphone_proxy_config_done(proxy_cfg); /*initiate REGISTER with expire = 0*/

See also

A complete tutorial can be found at: “Basic registration” source code.