/*
 * This is the main module for the fcup-smsendpdu utility.
 */

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

int sms_write_mode;
char input_line[176*2+2];
int lineno;
int initdone, cmms_done;

process_cmdline(argc, argv)
	char **argv;
{
	int c;
	extern int optind;

	while ((c = getopt(argc, argv, "B:np:RwWX:")) != EOF) {
		if (atinterf_cmdline_opt(c))
			continue;
		switch (c) {
		case 'w':
			sms_write_mode = 1;
			continue;
		case 'W':
			sms_write_mode = 2;
			continue;
		default:
			/* error msg already printed */
			exit(ERROR_USAGE);
		}
	}
	if (argc != optind) {
		fprintf(stderr, "usage: %s [options]\n", argv[0]);
		exit(ERROR_USAGE);
	}
	return(0);
}

more_input()
{
	int c;

	c = getc(stdin);
	if (c == EOF)
		return(0);
	ungetc(c, stdin);
	return(1);
}

init_send_process()
{
	if (initdone)
		return(0);
	atinterf_init();
	/* enable verbose error messages */
	atinterf_exec_cmd_needok("AT+CMEE=2", 0, 0);
	/* set PDU mode */
	prep_for_pdu_mode();
	if (sms_write_mode == 0 && more_input()) {
		atinterf_exec_cmd_needok("AT+CMMS=1", 0, 0);
		cmms_done = 1;
	}
	initdone = 1;
	return(1);
}

process_line()
{
	char *cp;
	u_char pdubin[176];
	int cc, scalen;

	cp = index(input_line, '\n');
	if (!cp) {
		fprintf(stderr, "input line %d: too long or unterminated\n",
			lineno);
		exit(ERROR_USAGE);
	}
	*cp = '\0';
	cc = decode_hex_line(input_line, pdubin, sizeof pdubin);
	if (cc < 1) {
inv:		fprintf(stderr, "input line %d: not a valid PDU\n", lineno);
		exit(ERROR_USAGE);
	}
	if (pdubin[0] == 1 || pdubin[0] > 11)
		goto inv;
	scalen = pdubin[0] + 1;
	if (cc < scalen + 1)
		goto inv;
	/* good to go */
	init_send_process();
	send_pdu_out(input_line, cc - scalen);
}

main(argc, argv)
	char **argv;
{
	process_cmdline(argc, argv);
	for (lineno = 1; fgets(input_line, sizeof input_line, stdin); lineno++)
		process_line();
	if (!initdone)
		exit(0);
	if (cmms_done)
		atinterf_exec_cmd_needok("AT+CMMS=0", 0, 0);
	if (sms_write_mode == 1)
		sendafterwr_process();
	exit(0);
}