網絡編程學習筆記 五-迭代服務器端、客戶端實現(一 Win)

服務器端的實現

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <WinSock2.h>

#define BUF_SIZE 1024

void ErrorHandling(char *message)
{
    fputs(message, stderr);
    exit(1);
}

int main(int argc,char *argv[])
{
    WSADATA wsaData;
    SOCKET hServSock, hClntSock;
    char message[BUF_SIZE];
    int strlen, i;

    SOCKADDR_IN servAdr, clntAdr;
    int clntAdrSize;

    if (argc != 2)
    {
        printf("Usage : %s <port>\n", argv[0]);
        exit(1);
    }


    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
        ErrorHandling("WSAStartup() error!");

    hServSock = socket(PF_INET, SOCK_STREAM, 0);
    if (hServSock == INVALID_SOCKET)
        ErrorHandling("socket() error");

    memset(&servAdr, 0, sizeof(servAdr));

    servAdr.sin_family = PF_INET;
    servAdr.sin_addr.s_addr = htonl(INADDR_ANY);
    servAdr.sin_port = htons(atoi(argv[1]));

    if (bind(hServSock, (SOCKADDR*)&servAdr, sizeof(servAdr)) == SOCKET_ERROR)
        ErrorHandling("bind() error~");

    if (listen(hServSock, 5) == SOCKET_ERROR)
        ErrorHandling("Listen() error!");

    clntAdrSize = sizeof(clntAdr);

    for (i = 0; i < 5; i++)
    {
        hClntSock = accept(hServSock, (SOCKADDR*)&clntAdr, &clntAdrSize);
        if (hClntSock == -1)
            ErrorHandling("accept() error!");
        else
            printf("Connectd cline %d \n", i + 1);

        while ((strlen = recv(hClntSock, message, BUF_SIZE, 0)) != 0)
            send(hClntSock, message, strlen, 0);

        closesocket(hClntSock);
    }
    closesocket(hServSock);
    WSACleanup();

    return 0;
}

客戶端的實現

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <WinSock2.h>

#define BUF_SIZE 1024
void ErrorHandling(char *message);

int main(int argc, char *argv[])
{
    WSADATA wsaData;
    SOCKET hSocket;
    char message[BUF_SIZE];
    int strLen;
    SOCKADDR_IN servAddr;

    if (argc != 3)
    {
        printf("Usage : %s <IP> <Port>\n", argv[0]);
        exit(1);
    }

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
        ErrorHandling("WSAStartup() error!");

    hSocket = socket(PF_INET, SOCK_STREAM, 0);
    if (hSocket == INVALID_SOCKET)
        ErrorHandling("socket() error");

    memset(&servAddr, 0, sizeof(servAddr));
    servAddr.sin_family = AF_INET;
    servAddr.sin_addr.s_addr = inet_addr(argv[1]);
    servAddr.sin_port = htons(atoi(argv[2]));

    if (connect(hSocket, (SOCKADDR*)&servAddr, sizeof(servAddr)) == SOCKET_ERROR)
        ErrorHandling("connect() error");
    else
        puts("connected..............");
    while (1)
    {
        fputs("input message(Q to quit): ", stdout);
        fgets(message, BUF_SIZE, stdin);

        if (!strcmp(message, "q\n") || !strcmp(message, "Q\n"))
            break;
        send(hSocket, message, strlen(message), 0);
        strLen = recv(hSocket, message, BUF_SIZE - 1, 0);
        message[strLen] = 0;

        printf("message from server: %s \n", message);
    }
    closesocket(hSocket);
    WSACleanup();

    return 0;
}

void ErrorHandling(char *message)
{
    fputs(message, stderr);
    fputc('\n', stderr);
    exit(1);
}