connect.c

#include <assert.h>
#include <pthread.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <errno.h>


int main() {
	int i, rc, no, flags;

	char node[] = "127.0.0.1";
	char service[] = "8080";

	struct addrinfo hints;

	for (i=0; i<=10*1000; i++) {
		memset (&hints, 0, sizeof (hints));
		hints.ai_family = AF_INET;
		hints.ai_socktype = SOCK_STREAM;

		struct addrinfo *info;
		rc = getaddrinfo (node, service, &hints, &info);
		assert(rc == 0);
		assert(info->ai_family == AF_INET);

		no = socket(info->ai_family, info->ai_socktype, info->ai_protocol);
		assert(no > 0);

		/*
		flags = fcntl(no, F_GETFL);
		flags |= O_NONBLOCK;
		rc = fcntl(no, F_SETFL, flags);
		assert(rc == 0);
		*/

		rc = connect(no, info->ai_addr, info->ai_addrlen);
		if(rc != 0) printf("RC .connect=%d %d\n", rc, i);

		close(no);
		freeaddrinfo(info);

		if (rc != 0) break;
	}
}