我正在编写一个 CLIENT/SERVER 程序,但客户端部分有问题。在客户端部分,我首先从服务器接收消息,但是当我想向服务器发送消息时,我遇到了一个问题 - 如何获取可以用作发送函数中的第一个参数的服务器套接字?
Function: int connect (int socket, struct sockaddr *addr, socklen_t length)
这是客户端代码的一部分:
#if defined (WIN32)
#include <winsock2.h>
typedef int socklen_t;
#elif defined (linux)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket(s) close(s)
typedef int SOCKET;
typedef struct sockaddr_in SOCKADDR_IN;
typedef struct sockaddr SOCKADDR;
#endif
#include <stdio.h>
#include <stdlib.h>
#define PORT 23
int main(void)
{
#if defined (WIN32)
WSADATA WSAData;
int erreur = WSAStartup(MAKEWORD(2,2), &WSAData);
#else
int erreur = 0;
#endif
SOCKET csock;
SOCKADDR_IN sin;
char buffer[32] = "";
if(!erreur)
{
csock = socket(AF_INET, SOCK_STREAM, 0);
sin.sin_addr.s_addr = inet_addr("127.0.0.1");
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
if(connect(csock, (SOCKADDR*)&sin, sizeof(sin)) != SOCKET_ERROR)
{
//
if(recv(csock, buffer, 32, 0) != SOCKET_ERROR)
printf("Recu : %s\n", buffer);
char buffer1[32] = "how are you !";
send( ?sock?, buffer1, 32, 0); // here is my problem , so what is the first parameter(?sock?) in the "send" function that i need to send message to the server ?
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