From af809923e4ca05215814b313f9b57f29b8ffdc33 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 23 Aug 2011 11:28:35 +0200
Subject: [PATCH] externalsocket.c: new example
---
docs/examples/.gitignore | 1 +
docs/examples/Makefile.inc | 2 +-
docs/examples/externalsocket.c | 128 +++++++++++++++++++++++++++++++++
3 files changed, 130 insertions(+), 1 deletion(-)
create mode 100644 docs/examples/externalsocket.c
diff --git a/docs/examples/.gitignore b/docs/examples/.gitignore
index 7e5ecdb1d2..42429d8f89 100644
--- a/docs/examples/.gitignore
+++ b/docs/examples/.gitignore
@@ -4,6 +4,7 @@ certinfo
chkspeed
cookie_interface
debug
+externalsocket
fileupload
fopen
ftp-wildcard
diff --git a/docs/examples/Makefile.inc b/docs/examples/Makefile.inc
index c075203215..c6a3e9c5b4 100644
--- a/docs/examples/Makefile.inc
+++ b/docs/examples/Makefile.inc
@@ -4,7 +4,7 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
https multi-app multi-debugcallback multi-double multi-post multi-single \
persistant post-callback postit2 sepheaders simple simplepost simplessl \
sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \
- smtp-multi simplesmtp smtp-tls rtsp
+ smtp-multi simplesmtp smtp-tls rtsp externalsocket
# These examples require external dependencies that may not be commonly
# available on POSIX systems, so don't bother attempting to compile them here.
diff --git a/docs/examples/externalsocket.c b/docs/examples/externalsocket.c
new file mode 100644
index 0000000000..39440afd56
--- /dev/null
+++ b/docs/examples/externalsocket.c
@@ -0,0 +1,128 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+/*
+ * This is an example demonstrating how an application can pass in a custom
+ * socket to libcurl to use. This example also handles the connect itself.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <curl/curl.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <sys/socket.h> /* socket definitions */
+#include <sys/types.h> /* socket types */
+#include <arpa/inet.h> /* inet (3) funtions */
+#include <unistd.h> /* misc. UNIX functions */
+
+#include <errno.h>
+
+/* The IP address and port number to connect to */
+#define IPADDR "127.0.0.1"
+#define PORTNUM 80
+
+static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
+{
+ int written = fwrite(ptr, size, nmemb, (FILE *)stream);
+ return written;
+}
+
+static curl_socket_t opensocket(void *clientp,
+ curlsocktype purpose,
+ struct curl_sockaddr *address)
+{
+ curl_socket_t sockfd = *(curl_socket_t *)clientp;
+ /* the actual externally set socket is passed in via the OPENSOCKETDATA
+ option */
+ return sockfd;
+}
+
+static int sockopt_callback(void *clientp, curl_socket_t curlfd,
+ curlsocktype purpose)
+{
+ /* This return code was added in libcurl 7.21.5 */
+ return CURL_SOCKOPT_ALREADY_CONNECTED;
+}
+
+int main(void)
+{
+ CURL *curl;
+ CURLcode res;
+ struct sockaddr_in servaddr; /* socket address structure */
+ curl_socket_t sockfd;
+
+ curl = curl_easy_init();
+ if(curl) {
+ /*
+ * Note that libcurl will internally think that you connect to the host
+ * and port that you specify in the URL option.
+ */
+ curl_easy_setopt(curl, CURLOPT_URL, "http://99.99.99.99:9999");
+
+ /* Create the socket "manually" */
+ if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) {
+ fprintf(stderr, "ECHOCLNT: Error creating listening socket.\n");
+ return 3;
+ }
+
+ memset(&servaddr, 0, sizeof(servaddr));
+ servaddr.sin_family = AF_INET;
+ servaddr.sin_port = htons(PORTNUM);
+
+ if(inet_aton(IPADDR, &servaddr.sin_addr) <= 0 )
+ return 2;
+
+ if(connect(sockfd,(struct sockaddr *) &servaddr, sizeof(servaddr)) ==
+ -1) {
+ close(sockfd);
+ printf("client error: connect: %s\n", strerror(errno));
+ return 1;
+ }
+
+ /* no progress meter please */
+ curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
+
+ /* send all data to this function */
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+
+ /* call this function to get a socket */
+ curl_easy_setopt(curl, CURLOPT_OPENSOCKETFUNCTION, opensocket);
+ curl_easy_setopt(curl, CURLOPT_OPENSOCKETDATA, &sockfd);
+
+ /* call this function to set options for the socket */
+ curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
+
+ curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+
+ res = curl_easy_perform(curl);
+
+ curl_easy_cleanup(curl);
+
+ if(res) {
+ printf("libcurl error: %d\n", res);
+ return 4;
+ }
+ }
+ return 0;
+}
--
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