TCP/IP socket programming in C（一）

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// 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;}

参考：http://www.binarytides.com/socket-programming-c-linux-tutorial/

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