/*
 * In this module we implement stdin command handling, supporting
 * user-initiated CANCEL and BYE as well as TFO testing commands.
 */

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>

static void
tfo_req_cmd(args)
	char *args;
{
	char *cp;
	unsigned sig, codec;

	for (cp = args; isspace(*cp); cp++)
		;
	if (!isdigit(*cp)) {
inv_syntax:	fprintf(stderr, "error: tfo-req command invalid syntax\n");
		return;
	}
	sig = strtoul(cp, &cp, 0);
	if (!isspace(*cp))
		goto inv_syntax;
	if (sig > 0xFF) {
		fprintf(stderr, "error: Sig argument out of range\n");
		return;
	}
	while (isspace(*cp))
		cp++;
	if (!isdigit(*cp))
		goto inv_syntax;
	codec = strtoul(cp, &cp, 0);
	if (*cp && !isspace(*cp))
		goto inv_syntax;
	if (codec > 14) {
		fprintf(stderr, "error: Codec_Type argument out of range\n");
		return;
	}
	while (isspace(*cp))
		cp++;
	if (*cp)
		goto inv_syntax;
	send_tfo_req(sig, codec);
}

void
select_stdin()
{
	char buf[256], *cp;

	fgets(buf, sizeof buf, stdin);
	cp = index(buf, '\n');
	if (cp) {
		while (cp > buf && isspace(cp[-1]))
			cp--;
		*cp = '\0';
	}
	for (cp = buf; isspace(*cp); cp++)
		;
	if (!*cp)
		return;
	if (!strcmp(cp, "b") || !strcasecmp(cp, "bye"))
		send_bye_req();
	else if (!strcmp(cp, "c") || !strcasecmp(cp, "cancel"))
		send_cancel_req();
	else if (!strncmp(cp, "tfo-req", 7) && isspace(cp[7]))
		tfo_req_cmd(cp + 8);
	else
		fprintf(stderr, "error: non-understood stdin command\n");
}