client 错误代码

如果是客户端和server端断开之后，connect重连的时候，需要重新创建socket

#include <netinet/in.h>    // for sockaddr_in  
#include <sys/types.h>    // for socket  
#include <sys/socket.h>    // for socket  
#include <stdio.h>        // for printf  
#include <stdlib.h>        // for exit  
#include <string.h>        // for bzero  

#include <unistd.h>    //close
#include <arpa/inet.h>   //inet_aton
#include <errno.h>
   
#define HELLO_WORLD_SERVER_PORT    6666   
#define BUFFER_SIZE 1024  
#define FILE_NAME_MAX_SIZE 512  

extern int errno;

int main(int argc, char **argv)  
{  
    if (argc != 2)  
    {  
        printf("Usage: ./%s ServerIPAddress\n",argv[0]);  
        exit(1);  
    }  
	
    //创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket  
    int client_socket = socket(AF_INET,SOCK_STREAM,0);  
    if( client_socket < 0)  
    {  
        printf("Create Socket Failed!\n");  
        exit(1);  
    }  
   
    //设置一个socket地址结构server_addr,代表服务器的internet地址, 端口  
    struct sockaddr_in server_addr;  
    bzero(&server_addr,sizeof(server_addr));  
    server_addr.sin_family = AF_INET;  
    if(inet_aton(argv[1],&server_addr.sin_addr) == 0) //服务器的IP地址来自程序的参数  
    {  
        printf("Server IP Address Error!\n");  
        exit(1);  
    }  
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);  
    socklen_t server_addr_length = sizeof(server_addr);  
   
	while(1)
	{
		//向服务器发起连接,连接成功后client_socket代表了客户机和服务器的一个socket连接 
		int ret = 0;
		if( (ret=connect(client_socket,(struct sockaddr*)&server_addr, server_addr_length)) < 0)  
		{  
			printf("Can Not Connect To %s!   %d\n",argv[1],errno);  

			if(errno==106 || errno==110)   //<span style="color:#ff0000;">已经连接上或者连接超时</span>
			{
				close(client_socket);  
				printf("client_socket");  
				int client_socket = socket(AF_INET,SOCK_STREAM,0);  
				if( client_socket < 0)  
				{  
					printf("Create Socket Failed!\n");  
					exit(1);  
				} 
				else
				{
					printf("Create Socket success!\n");  
				}
			}
			sleep(1);   
			continue;
		} 
		
		printf("Create============!\n"); 

		char buffer[BUFFER_SIZE]={0};  
		strcpy(buffer,"1111");

		//向服务器发送buffer中的数据  
		send(client_socket,buffer,BUFFER_SIZE,0);  
	   
		//从服务器接收数据到buffer中  
		bzero(buffer,BUFFER_SIZE);  
		int length = 0;  
		while( length = recv(client_socket,buffer,BUFFER_SIZE,0))  
		{  
			if(length < 0)  
			{  
				printf("Recieve Data From Server %s Failed!\n", argv[1]);  
				break;  
			}  
			printf("buffer = %s\n",buffer);
			bzero(buffer,BUFFER_SIZE);      
		}  
	}
    close(client_socket);  
    return 0;  
}