154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/*
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* This is an example demonstrating how an application can pass in a custom
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* socket to libcurl to use. This example also handles the connect itself.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <curl/curl.h>
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#ifdef WIN32
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#include <windows.h>
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#define close closesocket
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#else
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#include <sys/types.h> /* socket types */
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#include <sys/socket.h> /* socket definitions */
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#include <netinet/in.h>
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#include <arpa/inet.h> /* inet (3) funtions */
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#include <unistd.h> /* misc. UNIX functions */
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#endif
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#include <errno.h>
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/* The IP address and port number to connect to */
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#define IPADDR "127.0.0.1"
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#define PORTNUM 80
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#ifndef INADDR_NONE
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#define INADDR_NONE 0xffffffff
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#endif
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static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
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{
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int written = fwrite(ptr, size, nmemb, (FILE *)stream);
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return written;
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}
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static curl_socket_t opensocket(void *clientp,
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curlsocktype purpose,
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struct curl_sockaddr *address)
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{
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curl_socket_t sockfd;
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(void)purpose;
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(void)address;
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sockfd = *(curl_socket_t *)clientp;
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/* the actual externally set socket is passed in via the OPENSOCKETDATA
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option */
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return sockfd;
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}
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static int sockopt_callback(void *clientp, curl_socket_t curlfd,
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curlsocktype purpose)
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{
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(void)clientp;
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(void)curlfd;
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(void)purpose;
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/* This return code was added in libcurl 7.21.5 */
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return CURL_SOCKOPT_ALREADY_CONNECTED;
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}
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int main(void)
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{
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CURL *curl;
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CURLcode res;
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struct sockaddr_in servaddr; /* socket address structure */
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curl_socket_t sockfd;
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#ifdef WIN32
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WSADATA wsaData;
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int initwsa;
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if((initwsa = WSAStartup(MAKEWORD(2,0), &wsaData)) != 0) {
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printf("WSAStartup failed: %d\n", initwsa);
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return 1;
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}
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#endif
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curl = curl_easy_init();
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if(curl) {
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/*
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* Note that libcurl will internally think that you connect to the host
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* and port that you specify in the URL option.
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*/
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curl_easy_setopt(curl, CURLOPT_URL, "http://99.99.99.99:9999");
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/* Create the socket "manually" */
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if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) == CURL_SOCKET_BAD ) {
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printf("Error creating listening socket.\n");
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return 3;
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}
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memset(&servaddr, 0, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_port = htons(PORTNUM);
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if (INADDR_NONE == (servaddr.sin_addr.s_addr = inet_addr(IPADDR)))
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return 2;
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if(connect(sockfd,(struct sockaddr *) &servaddr, sizeof(servaddr)) ==
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-1) {
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close(sockfd);
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printf("client error: connect: %s\n", strerror(errno));
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return 1;
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}
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/* no progress meter please */
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curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
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/* send all data to this function */
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
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/* call this function to get a socket */
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curl_easy_setopt(curl, CURLOPT_OPENSOCKETFUNCTION, opensocket);
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curl_easy_setopt(curl, CURLOPT_OPENSOCKETDATA, &sockfd);
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/* call this function to set options for the socket */
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curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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if(res) {
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printf("libcurl error: %d\n", res);
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return 4;
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}
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}
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return 0;
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}
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