linux sip

#include <pjsua-lib/pjsua.h>

#define THIS_FILE "main.c"

static void on_incoming_call(pjsua_acc_id acc_id, pjsua_call_id call_id, pjsip_rx_data *rdata) {
    pjsua_call_info ci;
    pjsua_call_get_info(call_id, &ci);

    PJ_LOG(3, (THIS_FILE, "Incoming call from %.*s", (int)ci.remote_uri.slen, ci.remote_uri.ptr));

    /* Answer the call with 200/OK */
    pjsua_call_answer(call_id, 200, NULL, NULL);
}

static void on_call_state(pjsua_call_id call_id, pjsip_event *e) {
    pjsua_call_info ci;
    pjsua_call_get_info(call_id, &ci);

    PJ_LOG(3, (THIS_FILE, "Call %d state=%.*s", call_id, (int)ci.state_text.slen, ci.state_text.ptr));
}

int main(int argc, char *argv[]) {
    pj_status_t status;

    /* Initialize PJLIB library */
    status = pj_init();
    if (status != PJ_SUCCESS) {
        PJ_LOG(3, (THIS_FILE, "Error in pj_init(): %d", status));
        return 1;
    }

    /* Initialize PJLIB-UDP transport */
    {
        pjsua_transport_config tcfg;
        pjsua_transport_id trans_id;
        status = pjsua_transport_create(PJSIP_TRANSPORT_UDP, &tcfg, &trans_id);
        if (status != PJ_SUCCESS) {
            PJ_LOG(3, (THIS_FILE, "Error creating transport: %d", status));
            return 1;
        }
    }

    /* Initialize and start PJSUA */
    status = pjsua_create();
    if (status != PJ_SUCCESS) {
        PJ_LOG(3, (THIS_FILE, "Error in pjsua_create(): %d", status));
        return 1;
    }

    {
        pjsua_config cfg;
        pjsua_logging_config log_cfg;

        /* Initialize config with default settings */
        pjsua_config_default(&cfg);
        cfg.cb.on_incoming_call = &on_incoming_call;
        cfg.cb.on_call_state = &on_call_state;

        /* Initialize logging config with default settings */
        pjsua_logging_config_default(&log_cfg);
        log_cfg.console_level = 4;

        status = pjsua_init(&cfg, &log_cfg);
        if (status != PJ_SUCCESS) {
            PJ_LOG(3, (THIS_FILE, "Error in pjsua_init(): %d", status));
            return 1;
        }
    }

    /* Add UDP transport */
    {
        pjsua_transport_config tcfg;
        pjsua_transport_id trans_id;
        tcfg.port = 5060;
        status = pjsua_transport_create(PJSIP_TRANSPORT_UDP, &tcfg, &trans_id);
        if (status != PJ_SUCCESS) {
            PJ_LOG(3, (THIS_FILE, "Error creating transport: %d", status));
            return 1;
        }
    }

    /* Start PJSUA */
    status = pjsua_start();
    if (status != PJ_SUCCESS) {
        PJ_LOG(3, (THIS_FILE, "Error in pjsua_start(): %d", status));
        return 1;
    }

    /* Register to SIP server */
    {
        pjsua_acc_config acc_cfg;
        pjsua_acc_id acc_id;

        pjsua_acc_config_default(&acc_cfg);
        acc_cfg.id_uri = pj_str("sip:user@domain");
        acc_cfg.reg_uri = pj_str("sip:domain");
        acc_cfg.cred_count = 1;
        acc_cfg.cred_info[0].realm = pj_str("*");
        acc_cfg.cred_info[0].username = pj_str("user");
        acc_cfg.cred_info[0].data_type = PJSIP_CRED_DATA_PLAIN_PASSWD;
        acc_cfg.cred_info[0].data = pj_str("password");

        status = pjsua_acc_add(&acc_cfg, PJ_TRUE, &acc_id);
        if (status != PJ_SUCCESS) {
            PJ_LOG(3, (THIS_FILE, "Error adding account: %d", status));
            return 1;
        }
    }

    /* Wait for termination */
    pj_thread_sleep(10000);

    /* Make sure that we exit gracefully */
    pjsua_destroy();
    pj_shutdown();

    return 0;
}