/*
 * Functions for the AT-over-RVTMUX interface
 */

#include <sys/types.h>
#include <sys/errno.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <unistd.h>
#include "pktmux.h"
#include "limits.h"
#include "exitcodes.h"

extern u_char rvi_msg[];
extern int rvi_msg_len;
extern int oneshot_nowait;
extern int sock;

send_string_to_ati(str)
	char *str;
{
	unsigned len;
	u_char sendpkt[MAX_PKT_TO_TARGET+1];

	len = strlen(str);
	if (len + 1 > MAX_PKT_TO_TARGET) {
		printf("error: max pkt to target limit exceeded\n");
		return(ERROR_USAGE);
	}
	/* fill out the packet */
	sendpkt[0] = RVT_AT_HEADER;
	strcpy(sendpkt + 1, str);
	/* send it! */
	send_pkt_to_target(sendpkt, len + 1);
	return(0);
}

void
cmd_sendat(arg)
	char *arg;
{
	while (isspace(*arg))
		arg++;
	if (!*arg) {
		printf("error: missing string argument\n");
		return;
	}
	ati_rx_control(1);
	send_string_to_ati(arg);
}

oneshot_at_command(cmd)
	char *cmd;
{
	fd_set fds;
	int rc;

	if (!oneshot_nowait) {
		init();		/* to catch the response properly */
		ati_rx_control(1);
	}
	rc = send_string_to_ati(cmd);
	if (rc)
		exit(rc);
	if (oneshot_nowait)
		exit(0);
	/* wait for response */
	for (;;) {
		FD_ZERO(&fds);
		FD_SET(sock, &fds);
		rc = select(sock+1, &fds, 0, 0, 0);
		if (rc < 0) {
			if (errno == EINTR)
				continue;
			perror("select");
			exit(ERROR_UNIX);
		}
		if (FD_ISSET(sock, &fds))
			handle_rvinterf_input();
	}
}

cmd_str_oneshot(argc, argv)
	char **argv;
{
	return oneshot_at_command(argv[1]);
}

void
oneshot_at_check_response()
{
	if (rvi_msg_len == 4 && !strncmp(rvi_msg + 2, "OK", 2))
		exit(0);
	if (rvi_msg_len == 4 && !strncmp(rvi_msg + 2, "> ", 2))
		exit(0);
	if (rvi_msg_len == 7 && !strncmp(rvi_msg + 2, "ERROR", 5))
		exit(ERROR_TARGET);
	if (rvi_msg_len == 6 && !strncmp(rvi_msg + 2, "BUSY", 4))
		exit(ERROR_TARGET);
	if (rvi_msg_len == 12 && !strncmp(rvi_msg + 2, "NO CARRIER", 10))
		exit(ERROR_TARGET);
	if (rvi_msg_len >= 12 && !strncmp(rvi_msg + 2, "+CME ERROR", 10))
		exit(ERROR_TARGET);
	if (rvi_msg_len >= 12 && !strncmp(rvi_msg + 2, "+CMS ERROR", 10))
		exit(ERROR_TARGET);
}