view rvinterf/l1filter/init.c @ 965:2969032bdfac

fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 01 Sep 2023 07:33:51 +0000
parents ea458ee48691
children
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/*
 * This module implements some init for l1trace-filter.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "pktmux.h"
#include "localsock.h"

extern int sock;

send_init_command(cmdpkt, cmdlen)
	u_char *cmdpkt;
{
	u_char lenbuf[2];

	lenbuf[0] = 0;
	lenbuf[1] = cmdlen;
	write(sock, lenbuf, 2);
	write(sock, cmdpkt, cmdlen);
}

init()
{
	static u_char want_l1_mux[2] = {CLI2RVI_WANT_MUXPROTO, RVT_L1_HEADER};

	localsock_prep_for_length_rx();
	send_init_command(want_l1_mux, 2);
}