ssrc_specific port specifiucation

[Daniel Pezoa]

Hello,
I'am developing a basic srtp program wich must recieve specific ip_addr/port srtp trafic. I have started with that code:

    srtp_t session;
    srtp_policy_t policy;
    uint8_t key[30];
    // initialize libSRTP
    srtp_init();
    // set policy to describe a policy for an SRTP stream
    //crypto_policy_set_rtp_default(&policy.rtp);
    crypto_policy_set_aes_cm_128_hmac_sha1_32(&policy.rtp);
    crypto_policy_set_rtcp_default(&policy.rtcp);
    policy.ssrc.type = ssrc_specific;

    policy.ssrc.value = IP_PORT_SOURCE; // i don't know how to specify this

    policy.key = key;
    policy.next = NULL;
    // set key to random value
    crypto_get_random(key, 30);
    // allocate and initialize the SRTP session
    srtp_create(&session, policy);
    // main loop: get rtp packets, send srtp packets
    while (1) {
            char rtp_buffer[2048];
            unsigned len;
            len = get_rtp_packet(rtp_buffer);
            srtp_protect(session, rtp_buffer, &len);
            send_srtp_packet(rtp_buffer, len);
    }

i don't know how to specify the ip address and port number in the policy.sscr.value . I think something like inet_ntoa + htons colud be possible anywhone can help please, i'am stucked with this ...

thanks in advance!
Daniel