TCP/IP socket programming in C（一）

// client.c
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>

#include <sys/socket.h>
#include <netinet/in.h> /* inet_addr */

int main(int argc, char *argv[])
{
int socket_desc;
struct sockaddr_in server;
char *message, server_reply[2000];

// Create socket
socket_desc = socket(AF_INET, SOCK_STREAM, 0);
if (socket_desc == -1) {
printf("Could not create socket\n");
}

server.sin_addr.s_addr = inet_addr("74.125.235.20");
server.sin_family = AF_INET;
server.sin_port = htons(80);

// Connect to remote server
if (connect(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0) {
puts("connect error\n");
return 1;
}

puts("Connected\n");

// Send some data
message = "GET / HTTP/1.1\r\n\r\n";
if (send(socket_desc, message, strlen(message), 0) < 0) {
puts("Send failed\n");
return 1;
}
puts("Data Send\n");

// Receive a reply from the server
if (recv(socket_desc, server_reply, 2000, 0) < 0) {
puts("recv failed");
}
puts("Reply received\n");
puts(server_reply);

// Close socket
close(socket_desc);

return 0;
}