/*
 * This module contains the implementation of the Tx extension to rvtdump
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <unistd.h>
#include "txpkt.h"

static char sockpath[] = "/tmp/rvt_send_socket";

int sendsock_fd;
u_char sendsock_pkt[MAX_PKT_TO_TARGET];
int sendsock_pktlen;

create_send_socket()
{
	/* local socket binding voodoo copied from osmocon */
	struct sockaddr_un local;
	unsigned int namelen;
	int rc;

	sendsock_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
	if (sendsock_fd < 0) {
		perror("socket(AF_UNIX, SOCK_DGRAM, 0)");
		exit(1);
	}

	local.sun_family = AF_UNIX;
	strncpy(local.sun_path, sockpath, sizeof(local.sun_path));
	local.sun_path[sizeof(local.sun_path) - 1] = '\0';
	unlink(local.sun_path);

	/* we use the same magic that X11 uses in Xtranssock.c for
	 * calculating the proper length of the sockaddr */
#if defined(BSD44SOCKETS) || defined(__UNIXWARE__)
	local.sun_len = strlen(local.sun_path);
#endif
#if defined(BSD44SOCKETS) || defined(SUN_LEN)
	namelen = SUN_LEN(&local);
#else
	namelen = strlen(local.sun_path) +
		  offsetof(struct sockaddr_un, sun_path);
#endif

	rc = bind(sendsock_fd, (struct sockaddr *) &local, namelen);
	if (rc != 0) {
		perror("bind on local dgram socket");
		exit(1);
	}

	return(0);
}

handle_sendsock()
{
	sendsock_pktlen = recv(sendsock_fd, sendsock_pkt, MAX_PKT_TO_TARGET, 0);
	if (sendsock_pktlen <= 0) {
		fprintf(stderr, "return value from recv on socket: %d\n",
			sendsock_pktlen);
		exit(1);
	}
	send_pkt_to_target(sendsock_pkt, sendsock_pktlen);
	log_sent_packet(sendsock_pkt, sendsock_pktlen);
}