知識のかけら

試しにWinsockでつないでみる。

#include <stdio.h>
#include <winsock2.h>
#include <string.h>

int main()
{
    WSADATA wsaData;
    struct sockaddr_in server;
    SOCKET sock;
    char buf[1024];
    char send_buf[1024];
   
    WSAStartup(MAKEWORD(2, 0), &wsaData);
   
    sock = socket(AF_INET, SOCK_STREAM, 0);
   
    server.sin_family = AF_INET;
    server.sin_port = htons(80);
    server.sin_addr.S_un.S_addr = inet_addr("66.249.89.99");
    
    connect(sock, (struct sockaddr *)&server, sizeof(server));

    strcpy(send_buf, "GET ./index.html HTTP/1.1\r\n\r\n");

    if (send(sock, send_buf, strlen(send_buf), 0) <= 0) {
      perror("send");
      exit(EXIT_FAILURE);
    }
   
    memset(buf, 0, sizeof(buf));
    int n = recv(sock, buf, sizeof(buf) - 1, 0);
    printf("%d, %s\n", n, buf);
   
    fflush(stdout);

    WSACleanup();
   
    return 0;
}