sctp_init_timeout_test

# sctp_init_timeou_test
Quick method of testing timeouts and connectivity of basic SCTP sockets.

Makefile

APP=sctp_init_timeo_test

all:
	gcc -o $(APP) $(APP).c -Wall -lsctp

clean:
	rm $(APP)

sctp_init_timeo_test.c

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/sctp.h>
#include <arpa/inet.h>
#include <sys/types.h>

#define TIMEOUT_IN_MS 10000

int sctp_serve_and_ignore(int listen_port);
int sctp_connect();
int main(int argc, char **argv);
void print_usage_and_exit();


int sctp_serve_and_ignore(int listen_port)
{
	int listenfd = 0;

	struct sockaddr_in serv_addr;

	listenfd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP);

	serv_addr.sin_family = AF_INET;
	serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
	serv_addr.sin_port = htons(listen_port);

	if(bind(listenfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)))
		return -1;

	if(listen(listenfd, 10))
		return -1;

	printf("Server now listening on %d - will not accept connections.\n", listen_port);

	while(1)
	{
		sleep(10);
	}

	return 0;
}

int sctp_connect(char *addr, int port)
{
	int connfd;

	struct sockaddr_in serv_addr;
	struct sctp_initmsg initmsg;

	connfd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP);
 
	serv_addr.sin_family = AF_INET;
	serv_addr.sin_port = htons(port);
	serv_addr.sin_addr.s_addr = inet_addr(addr);

	initmsg.sinit_num_ostreams = 10; 
	initmsg.sinit_max_instreams = 10; 
	initmsg.sinit_max_attempts = 5;
	initmsg.sinit_max_init_timeo = TIMEOUT_IN_MS;

	setsockopt(connfd, IPPROTO_SCTP, SCTP_INITMSG, &initmsg, sizeof(initmsg));

	printf("Attempting to connect...\n");

	if(connect(connfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)))
		return -1; 

	printf("Connect sequence completed.\n");

	return 0;
}

int main(int argc, char **argv)
{
	if(argc < 2)
		print_usage_and_exit();
	
	char match = argv[1][0];

	switch(match)
	{
		case 's':
			if(argc > 3)
				print_usage_and_exit();
			sctp_serve_and_ignore(atoi(argv[2]));
			break;
		case 'c':
			if(argc > 4)
				print_usage_and_exit();
			sctp_connect(argv[2], atoi(argv[3]));
			break;
		default:
			print_usage_and_exit();
	}

	return 0;
}

void print_usage_and_exit()
{
	printf("Usage:\n");
	printf("  # sctp_init_timeo_test s <listen port>\n");
	printf("  # sctp_init_timeo_test c <server IP> <server port>\n");
	exit(1);
}