Socket编程问题

hbxtght 2011-11-26 10:26:59

我用c写了一个简单的server端,但运行的时候,我用另外一个java程序来连接它,但抛出了:java.net.ConnectException: Connection refused异常,我查了一下,发现指定的端口似乎并没有打开,server代码如下:

#include <stdio.h>

#include <sys/socket.h>

#include <sys/types.h>

#include <sys/un.h>

#include <unistd.h>

#include <stdlib.h>

#include <arpa/inet.h>



int main(int argc, const char *argv[])

{

	int server_sockfd, client_sockfd;	

	int server_len, client_len;

	struct sockaddr_in server_address;

	struct sockaddr_in client_address;



	//unlink("/home/ght/server_socket");

	server_sockfd = socket(AF_INET, SOCK_STREAM, 0);

	server_address.sin_family = AF_INET;	

	server_address.sin_port = 2000;

	inet_pton(AF_INET, "127.0.0.1", &server_address.sin_addr);

    //strcpy(server_address.sun_path, "/home/ght/server_socket");

	server_len = sizeof(server_address);

	printf("Port is: %d\n", server_address.sin_port);

	if ((bind(server_sockfd, (struct sockaddr *)&server_address, server_len)) == -1)

	{

		perror("Error occured while binding");

		exit(-1);

	}



	listen(server_sockfd, 5);

	while (1) 

	{

		/*

		 *char ch;

		 *char s[20];

		 */

		FILE *pFile = NULL;

		char *s = NULL;

		long size = 0;



		if ((pFile = fopen("/home/ght/Pictures/ubuntu.gif", "r")) == NULL)

		{

			perror("Can't open the file");

			exit(-1);

		}

		fseek(pFile, 0, SEEK_END);

		size = ftell(pFile);

		s = (char *)malloc(size);

		fseek(pFile, 0, SEEK_SET);

		fread(s, size, 1, pFile);	

		printf("Server waitting...\n");

		client_len = sizeof(client_address);

		client_sockfd = accept(server_sockfd, (struct sockaddr *)&client_address, &client_len);

		write(client_sockfd, s, size);

		/*

		 *while (read(client_sockfd, &ch, 1) == 1) 

		 *{

		 *    if (ch == '\0') 

		 *    {

		 *        printf("\n");

		 *        break;

		 *    }

		 *    printf("%c", ch);

		 *}

		 */

		//read(client_sockfd, s, 12);

		//printf("Reading something from client:%s\n", s);

		//ch++;

		//write(client_sockfd, &ch, 1);

		close(client_sockfd);

	}

	return 0;

}