/*
 * In this module we implement our MDCX operation.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <syslog.h>
#include "../include/codec_defs.h"
#include "../include/tmgw_ctrl.h"
#include "../include/tmgw_const.h"
#include "struct.h"

extern struct endpoint *find_ep_by_id();

static void
gsm_vars_init(ep)
	struct endpoint *ep;
{
	switch (ep->gsm_payload_msg_type) {
	case GSM_TCHF_FRAME:
		ep->gsm_payload_len = GSM_FR_BYTES;
		ep->gsm_payload_magic = 0xD0;
		return;
	case GSM_TCHF_FRAME_EFR:
		ep->gsm_payload_len = GSM_EFR_BYTES;
		ep->gsm_payload_magic = 0xC0;
		return;
	}
}

mdcx_operation(ep, req)
	struct endpoint *ep;
	struct tmgw_ctrl_req *req;
{
	int rc;

	if (req->setup_mask & TMGW_CTRL_MASK_GSM_CONN) {
		if (ep->ep_type != TMGW_EP_TYPE_GATEWAY)
			return TMGW_RESP_ERR_PROT;
		if (req->gsm_addr.ss_family != AF_INET)
			return TMGW_RESP_ERR_PARAM;
		if (req->gsm_payload_type > 0x7F)
			return TMGW_RESP_ERR_PARAM;
		switch (req->gsm_payload_msg_type) {
		case GSM_TCHF_FRAME:
		case GSM_TCHF_FRAME_EFR:
			break;
		case GSM_TCHH_FRAME:
		case GSM_TCH_FRAME_AMR:
			return TMGW_RESP_ERR_NOTSUP;
		default:
			return TMGW_RESP_ERR_PARAM;
		}
		if (ep->gsm_payload_msg_type &&
		    ep->gsm_payload_msg_type != req->gsm_payload_msg_type)
			return TMGW_RESP_ERR_PROT;
		bcopy(&req->gsm_addr, &ep->rtp_gsm.remote_addr,
			sizeof(struct sockaddr_in));
		ep->gsm_payload_type = req->gsm_payload_type;
		ep->gsm_payload_msg_type = req->gsm_payload_msg_type;
		gsm_vars_init(ep);
	}
	if (req->setup_mask & TMGW_CTRL_MASK_PSTN_CONN) {
		if (ep->ep_type != TMGW_EP_TYPE_GATEWAY)
			return TMGW_RESP_ERR_PROT;
		if (req->pstn_addr.ss_family != AF_INET)
			return TMGW_RESP_ERR_PARAM;
		switch (req->pstn_payload_type) {
		case PSTN_CODEC_PCMU:
		case PSTN_CODEC_PCMA:
			break;
		default:
			return TMGW_RESP_ERR_PARAM;
		}
		bcopy(&req->pstn_addr, &ep->rtp_pstn.remote_addr,
			sizeof(struct sockaddr_in));
		ep->pstn_payload_type = req->pstn_payload_type;
	}
	if (req->setup_mask & TMGW_CTRL_MASK_FWD_MODE) {
		if (ep->ep_type != TMGW_EP_TYPE_GATEWAY ||
		    ep->rtp_gsm.remote_addr.sin_family != AF_INET ||
		    ep->rtp_pstn.remote_addr.sin_family != AF_INET)
			return TMGW_RESP_ERR_PROT;
		if (req->fwd_mode & TMGW_FWD_ENABLE_GSM2PSTN) {
			rc = gsm2pstn_init(ep);
			if (rc != TMGW_RESP_OK)
				return rc;
		} else
			ep->dtmf_sample_ptr = 0;
		if (req->fwd_mode & TMGW_FWD_ENABLE_PSTN2GSM) {
			rc = pstn2gsm_init(ep);
			if (rc != TMGW_RESP_OK)
				return rc;
		}
		ep->fwd_mode = req->fwd_mode;
	}
	return TMGW_RESP_OK;
}

void
process_mdcx(conn, req, resp)
	struct ctrl_conn *conn;
	struct tmgw_ctrl_req *req;
	struct tmgw_ctrl_resp *resp;
{
	struct endpoint *ep;

	ep = find_ep_by_id(conn, req->ep_id);
	if (!ep) {
		resp->res = TMGW_RESP_ERR_PROT;
		return;
	}
	resp->res = mdcx_operation(ep, req);
}