Merge branch 'master' into http2-push

RELEASE-NOTES

@@ -18,6 +18,7 @@ This release includes the following changes:
    with the new CURLPIPE_MULTIPLEX bit for CURLMOPT_PIPELINING [16]
  o HTTP/2: requires nghttp2 1.0.0 or later
  o scripts: add zsh.pl for generating zsh completion
+ o curl.h: add CURL_HTTP_VERSION_2
 
 This release includes the following bugfixes:
 
@@ -61,6 +62,22 @@ This release includes the following bugfixes:
  o CURLOPT_COOKIELIST.3: Explain Set-Cookie without a domain [23]
  o FAQ: How do I port libcurl to my OS?
  o openssl: Use TLS_client_method for OpenSSL 1.1.0+
+ o HTTP-NTLM: fail auth on connection close instead of looping [24]
+ o curl_setup: Add macros for FOPEN_READTEXT, FOPEN_WRITETEXT [25]
+ o curl_getdate.3: update RFC reference
+ o curl_multi_info_read.3: added example
+ o curl_multi_perform.3: added example
+ o curl_multi_timeout.3: added example
+ o cookie: Stop exporting any-domain cookies [26]
+ o openssl: remove dummy callback use from SSL_CTX_set_verify()
+ o openssl: remove SSL_get_session()-using code
+ o openssl: removed USERDATA_IN_PWD_CALLBACK kludge
+ o openssl: removed error string #ifdef
+ o openssl: Fix verification of server-sent legacy intermediates [27]
+ o docs: man page indentation and syntax fixes
+ o docs: Spelling fixes
+ o fopen.c: fix a few compiler warnings
+ o CURLOPT_OPENSOCKETFUNCTION: return error at once [28]
 
 This release includes the following known bugs:
 
@@ -72,12 +89,12 @@ advice from friends like these:
   Alessandro Ghedini, Alexander Dyagilev, Anders Bakken, Anthony Avina,
   Ashish Shukla, Bert Huijben, Brian Chrisman, Brian Prodoehl, Chris Araman,
   Dagobert Michelsen, Dan Fandrich, Daniel Melani, Daniel Stenberg,
-  Dmitry Eremin-Solenikov, Egon Eckert, Fred Stluka, Grant Pannell, Jens Rantil,
-  Kamil Dudka, Linus Nielsen, Liviu Chircu, Marc Hoersken, Michael Osipov,
-  Oren Souroujon, Orgad Shaneh, Patrick Monnerat, Patrick Rapin, Paul Howarth,
-  Ray Satiro, Sean Boudreau, Tatsuhiro Tsujikawa, Viktor Szakáts,
-  Yehezkel Horowitz,
-  (33 contributors)
+  Dmitry Eremin-Solenikov, Egon Eckert, Fred Stluka, Gisle Vanem, Grant Pannell,
+  Isaac Boukris, Jens Rantil, Kamil Dudka, Linus Nielsen, Liviu Chircu,
+  Marc Hoersken, Michael Osipov, Oren Souroujon, Orgad Shaneh, Patrick Monnerat,
+  Patrick Rapin, Paul Howarth, Rafayel Mkrtchyan, Ray Satiro, Sean Boudreau,
+  Tatsuhiro Tsujikawa, Viktor Szakáts, Ville Skyttä, Yehezkel Horowitz,
+  (37 contributors)
 
         Thanks! (and sorry if I forgot to mention someone)
 
@@ -106,3 +123,8 @@ References to bug reports and discussions on issues:
  [21] = http://curl.haxx.se/mail/lib-2015-05/0056.html
  [22] = http://curl.haxx.se/mail/lib-2015-05/0115.html
  [23] = http://curl.haxx.se/mail/lib-2015-05/0137.html
+ [24] = https://github.com/bagder/curl/issues/256
+ [25] = https://github.com/bagder/curl/pull/258#issuecomment-107093055
+ [26] = https://github.com/bagder/curl/issues/292
+ [27] = https://rt.openssl.org/Ticket/Display.html?id=3621&user=guest&pass=guest
+ [28] = http://curl.haxx.se/mail/lib-2015-06/0047.html

docs/HTTP2.md

@@ -73,7 +73,7 @@ those transfers. With the new option `CURLOPT_PIPEWAIT` (added in 7.43.0), you
 can ask that a transfer should rather wait and see in case there's a
 connection for the same host in progress that might end up being possible to
 multiplex on. It favours keeping the number of connections low to the cost of
-slightly longer time to first byte transfered.
+slightly longer time to first byte transferred.
 
 Applications
 ------------

docs/TODO

@@ -429,7 +429,7 @@ be the same as/similar to FTP.
 
 11.2 Honor file timestamps
 
-The timestamp of the transfered file should reflect that of the original file.
+The timestamp of the transferred file should reflect that of the original file.
 
 11.3 Use NTLMv2
 

docs/curl.1

@@ -667,6 +667,7 @@ curl does one CWD with the full target directory and then operates on the file
 \&"normally" (like in the multicwd case). This is somewhat more standards
 compliant than 'nocwd' but without the full penalty of 'multicwd'.
 .RE
+.IP
 (Added in 7.15.1)
 .IP "--ftp-pasv"
 (FTP) Use passive mode for the data connection. Passive is the internal default
@@ -1227,7 +1228,7 @@ i.e "my.host.domain" to specify the machine
 make curl pick the same IP address that is already used for the control
 connection
 .RE
-
+.IP
 If this option is used several times, the last one will be used. Disable the
 use of PORT with \fI--ftp-pasv\fP. Disable the attempt to use the EPRT command
 instead of PORT by using \fI--disable-eprt\fP. EPRT is really PORT++.
@@ -1434,7 +1435,7 @@ specifies 300 bytes from offset 500(H)
 .B 100-199,500-599
 specifies two separate 100-byte ranges(*)(H)
 .RE
-
+.IP
 (*) = NOTE that this will cause the server to reply with a multipart
 response!
 
@@ -1898,7 +1899,7 @@ displayed with millisecond resolution.
 The URL that was fetched last. This is most meaningful if you've told curl
 to follow location: headers.
 .RE
-
+.IP
 If this option is used several times, the last one will be used.
 .IP "-x, --proxy <[protocol://][user:password@]proxyhost[:port]>"
 Use the specified proxy.

docs/examples/curlx.c

@@ -490,7 +490,7 @@ int main(int argc, char **argv) {
         BIO_printf(p.errorbio,"the response has a correct mimetype : %s\n",
                    response);
       else
-        BIO_printf(p.errorbio,"the reponse doesn\'t has an acceptable "
+        BIO_printf(p.errorbio,"the response doesn\'t have an acceptable "
                    "mime type, it is %s instead of %s\n",
                    response,mimetypeaccept);
   }

docs/examples/fopen.c

@@ -108,7 +108,7 @@ static size_t write_callback(char *buffer,
       size=rembuff;
     }
     else {
-      /* realloc suceeded increase buffer size*/
+      /* realloc succeeded increase buffer size*/
       url->buffer_len+=size - rembuff;
       url->buffer=newbuff;
     }
@@ -131,7 +131,7 @@ static int fill_buffer(URL_FILE *file, size_t want)
   CURLMcode mc; /* curl_multi_fdset() return code */
 
   /* only attempt to fill buffer if transactions still running and buffer
-   * doesnt exceed required size already
+   * doesn't exceed required size already
    */
   if((!file->still_running) || (file->buffer_pos > want))
     return 0;
@@ -205,7 +205,7 @@ static int fill_buffer(URL_FILE *file, size_t want)
 }
 
 /* use to remove want bytes from the front of a files buffer */
-static int use_buffer(URL_FILE *file,int want)
+static int use_buffer(URL_FILE *file, size_t want)
 {
   /* sort out buffer */
   if((file->buffer_pos - want) <=0) {
@@ -229,7 +229,7 @@ static int use_buffer(URL_FILE *file,int want)
 URL_FILE *url_fopen(const char *url,const char *operation)
 {
   /* this code could check for URLs or types in the 'url' and
-     basicly use the real fopen() for standard files */
+     basically use the real fopen() for standard files */
 
   URL_FILE *file;
   (void)operation;
@@ -375,7 +375,7 @@ char *url_fgets(char *ptr, size_t size, URL_FILE *file)
 
   switch(file->type) {
   case CFTYPE_FILE:
-    ptr = fgets(ptr,size,file->handle.file);
+    ptr = fgets(ptr, (int)size, file->handle.file);
     break;
 
   case CFTYPE_CURL:
@@ -451,7 +451,7 @@ int main(int argc, char *argv[])
   URL_FILE *handle;
   FILE *outf;
 
-  int nread;
+  size_t nread;
   char buffer[256];
   const char *url;
 
@@ -499,7 +499,7 @@ int main(int argc, char *argv[])
   }
 
   do {
-    nread = url_fread(buffer, 1,sizeof(buffer), handle);
+    nread = url_fread(buffer, 1, sizeof(buffer), handle);
     fwrite(buffer,1,nread,outf);
   } while(nread);
 

docs/examples/ftpget.c

@@ -53,7 +53,7 @@ int main(void)
   CURL *curl;
   CURLcode res;
   struct FtpFile ftpfile={
-    "curl.tar.gz", /* name to store the file as if succesful */
+    "curl.tar.gz", /* name to store the file as if successful */
     NULL
   };
 

docs/examples/ftpsget.c

@@ -55,7 +55,7 @@ int main(void)
   CURL *curl;
   CURLcode res;
   struct FtpFile ftpfile={
-    "yourfile.bin", /* name to store the file as if succesful */
+    "yourfile.bin", /* name to store the file as if successful */
     NULL
   };
 

docs/examples/imap-ssl.c

@@ -60,7 +60,7 @@ int main(void)
      * they have mentioned in their server certificate's commonName (or
      * subjectAltName) fields, libcurl will refuse to connect. You can skip
      * this check, but this will make the connection less secure. */
-#ifdef SKIP_HOSTNAME_VERFICATION
+#ifdef SKIP_HOSTNAME_VERIFICATION
     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
 #endif
 

docs/examples/multi-post.c

@@ -64,7 +64,7 @@ int main(void)
   curl = curl_easy_init();
   multi_handle = curl_multi_init();
 
-  /* initalize custom header list (stating that Expect: 100-continue is not
+  /* initialize custom header list (stating that Expect: 100-continue is not
      wanted */
   headerlist = curl_slist_append(headerlist, buf);
   if(curl && multi_handle) {

docs/examples/multi-single.c

@@ -81,7 +81,7 @@ int main(void)
     }
 
     /* 'numfds' being zero means either a timeout or no file descriptors to
-       wait for. Try timeout on first occurance, then assume no file
+       wait for. Try timeout on first occurrence, then assume no file
        descriptors and no file descriptors to wait for means wait for 100
        milliseconds. */
 

docs/examples/pop3-multi.c

@@ -69,7 +69,7 @@ int main(void)
   curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
   curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
 
-  /* This will retreive message 1 from the user's mailbox */
+  /* This will retrieve message 1 from the user's mailbox */
   curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
 
   /* Tell the multi stack about our easy handle */

docs/examples/pop3-retr.c

@@ -39,7 +39,7 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
     curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
 
-    /* This will retreive message 1 from the user's mailbox */
+    /* This will retrieve message 1 from the user's mailbox */
     curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
 
     /* Perform the retr */

docs/examples/pop3-ssl.c

@@ -40,7 +40,7 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
     curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
 
-    /* This will retreive message 1 from the user's mailbox. Note the use of
+    /* This will retrieve message 1 from the user's mailbox. Note the use of
      * pop3s:// rather than pop3:// to request a SSL based connection. */
     curl_easy_setopt(curl, CURLOPT_URL, "pop3s://pop.example.com/1");
 
@@ -60,7 +60,7 @@ int main(void)
      * they have mentioned in their server certificate's commonName (or
      * subjectAltName) fields, libcurl will refuse to connect. You can skip
      * this check, but this will make the connection less secure. */
-#ifdef SKIP_HOSTNAME_VERFICATION
+#ifdef SKIP_HOSTNAME_VERIFICATION
     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
 #endif
 

docs/examples/pop3-tls.c

@@ -40,7 +40,7 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
     curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
 
-    /* This will retreive message 1 from the user's mailbox */
+    /* This will retrieve message 1 from the user's mailbox */
     curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
 
     /* In this example, we'll start with a plain text connection, and upgrade

docs/examples/postit2.c

@@ -73,7 +73,7 @@ int main(int argc, char *argv[])
                CURLFORM_END);
 
   curl = curl_easy_init();
-  /* initalize custom header list (stating that Expect: 100-continue is not
+  /* initialize custom header list (stating that Expect: 100-continue is not
      wanted */
   headerlist = curl_slist_append(headerlist, buf);
   if(curl) {

docs/examples/sftpget.c

@@ -58,7 +58,7 @@ int main(void)
   CURL *curl;
   CURLcode res;
   struct FtpFile ftpfile={
-    "yourfile.bin", /* name to store the file as if succesful */
+    "yourfile.bin", /* name to store the file as if successful */
     NULL
   };
 

docs/examples/smtp-mail.c

@@ -24,7 +24,7 @@
 #include <curl/curl.h>
 
 /* This is a simple example showing how to send mail using libcurl's SMTP
- * capabilities. For an exmaple of using the multi interface please see
+ * capabilities. For an example of using the multi interface please see
  * smtp-multi.c.
  *
  * Note that this example requires libcurl 7.20.0 or above.

docs/examples/smtp-ssl.c

@@ -111,7 +111,7 @@ int main(void)
      * they have mentioned in their server certificate's commonName (or
      * subjectAltName) fields, libcurl will refuse to connect. You can skip
      * this check, but this will make the connection less secure. */
-#ifdef SKIP_HOSTNAME_VERFICATION
+#ifdef SKIP_HOSTNAME_VERIFICATION
     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
 #endif
 

docs/examples/xmlstream.c

@@ -120,7 +120,7 @@ int main(void)
   XML_SetElementHandler(parser, startElement, endElement);
   XML_SetCharacterDataHandler(parser, characterDataHandler);
 
-  /* Initalize a libcurl handle. */
+  /* Initialize a libcurl handle. */
   curl_global_init(CURL_GLOBAL_ALL ^ CURL_GLOBAL_SSL);
   curl_handle = curl_easy_init();
   curl_easy_setopt(curl_handle, CURLOPT_URL, "http://www.w3schools.com/xml/simple.xml");

docs/libcurl/curl_multi_wait.3

@@ -44,7 +44,7 @@ The calling application may pass additional curl_waitfd structures which are
 similar to \fIpoll(2)\fP's pollfd structure to be waited on in the same call.
 
 On completion, if \fInumfds\fP is non-NULL, it will be populated with the
-total number of file descriptors on which interesting events occured. This
+total number of file descriptors on which interesting events occurred. This
 number can include both libcurl internal descriptors as well as descriptors
 provided in \fIextra_fds\fP.
 

docs/libcurl/opts/CURLOPT_CHUNK_DATA.3

@@ -29,8 +29,8 @@ CURLOPT_CHUNK_DATA \- custom pointer to the FTP chunk callbacks
 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CHUNK_DATA, void *pointer);
 .SH DESCRIPTION
 Pass a \fIpointer\fP that will be untouched by libcurl and passed as the ptr
-argument to the \fICURL_CHUNK_BGN_FUNTION(3)\fP and
-\fICURL_CHUNK_END_FUNTION(3)\fP.
+argument to the \fICURL_CHUNK_BGN_FUNCTION(3)\fP and
+\fICURL_CHUNK_END_FUNCTION(3)\fP.
 .SH DEFAULT
 NULL
 .SH PROTOCOLS

docs/libcurl/symbols.pl

@@ -24,7 +24,7 @@
 # Experience has shown that the symbols-in-versions file is very useful to
 # applications that want to build with a wide range of libcurl versions.
 # It is however easy to get it wrong and the source gets a bit messy with all
-# the fixed numerical comparisions.
+# the fixed numerical comparisons.
 #
 # The point of this script is to provide an easy-to-use macro for libcurl-
 # using applications to do preprocessor checks for specific libcurl defines,

docs/mk-ca-bundle.1

@@ -43,7 +43,7 @@ curl, wget and more.
 The following options are supported:
 .IP -b
 backup an existing version of \fIoutputfilename\fP
-.IP -d [name]
+.IP "-d [name]"
 specify which Mozilla tree to pull certdata.txt from (or a custom URL). Valid
 names are: aurora, beta, central, mozilla, nss, release (default). They are
 shortcuts for which source tree to get the cert data from.
@@ -70,7 +70,7 @@ DATA_ENCIPHERMENT, KEY_AGREEMENT, KEY_CERT_SIGN, CRL_SIGN,
 SERVER_AUTH (default), CLIENT_AUTH, CODE_SIGNING, EMAIL_PROTECTION,
 IPSEC_END_SYSTEM, IPSEC_TUNNEL, IPSEC_USER, TIME_STAMPING, STEP_UP_APPROVED
 .RE
-
+.IP
 Valid trust levels are:
 .RS
 ALL, TRUSTED_DELEGATOR (default), NOT_TRUSTED, MUST_VERIFY_TRUST, TRUSTED

lib/connect.c

@@ -1166,8 +1166,11 @@ CURLcode Curl_connecthost(struct connectdata *conn,  /* context */
     conn->tempaddr[0] = conn->tempaddr[0]->ai_next;
   }
 
-  if(conn->tempsock[0] == CURL_SOCKET_BAD)
+  if(conn->tempsock[0] == CURL_SOCKET_BAD) {
+    if(!result)
+      result = CURLE_COULDNT_CONNECT;
     return result;
+  }
 
   data->info.numconnects++; /* to track the number of connections made */
 

lib/vtls/openssl.c

@@ -1699,7 +1699,8 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
   case CURL_SSLVERSION_TLSv1_1:
   case CURL_SSLVERSION_TLSv1_2:
     /* it will be handled later with the context options */
-#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && \
+    !defined(LIBRESSL_VERSION_NUMBER) && !defined(OPENSSL_IS_BORINGSSL)
     req_method = TLS_client_method();
 #else
     req_method = SSLv23_client_method();
@@ -2013,6 +2014,20 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
           data->set.str[STRING_SSL_CRLFILE]: "none");
   }
 
+  /* Try building a chain using issuers in the trusted store first to avoid
+  problems with server-sent legacy intermediates.
+  Newer versions of OpenSSL do alternate chain checking by default which
+  gives us the same fix without as much of a performance hit (slight), so we
+  prefer that if available.
+  https://rt.openssl.org/Ticket/Display.html?id=3621&user=guest&pass=guest
+  */
+#if defined(X509_V_FLAG_TRUSTED_FIRST) && !defined(X509_V_FLAG_NO_ALT_CHAINS)
+  if(data->set.ssl.verifypeer) {
+    X509_STORE_set_flags(SSL_CTX_get_cert_store(connssl->ctx),
+                         X509_V_FLAG_TRUSTED_FIRST);
+  }
+#endif
+
   /* SSL always tries to verify the peer, this only says whether it should
    * fail to connect if the verification fails, or if it should continue
    * anyway. In the latter case the result of the verification is checked with

src/tool_help.c

@@ -174,6 +174,10 @@ static const char *const helptext[] = {
   "     --proxy-negotiate  "
   "Use HTTP Negotiate (SPNEGO) authentication on the proxy (H)",
   "     --proxy-ntlm    Use NTLM authentication on the proxy (H)",
+#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
+  "     --proxy-service-name NAME  SPNEGO proxy service name",
+  "     --service-name NAME  SPNEGO service name",
+#endif
   " -U, --proxy-user USER[:PASSWORD]  Proxy user and password",
   "     --proxy1.0 HOST[:PORT]  Use HTTP/1.0 proxy on given port",
   " -p, --proxytunnel   Operate through a HTTP proxy tunnel (using CONNECT)",

tests/data/Makefile.inc

@@ -153,7 +153,7 @@ test1516 \
 \
 test1520 \
 \
-test1525 test1526 test1527 test1528 test1529 \
+test1525 test1526 test1527 test1528 test1529 test1530 \
 \
 test1600 test1601 test1602 \
 \

tests/data/test1530

@@ -0,0 +1,27 @@
+<testcase>
+<info>
+<keywords>
+CURLOPT_OPENSOCKETFUNCTION
+</keywords>
+</info>
+
+<client>
+<server>
+none
+</server>
+<tool>
+lib1530
+</tool>
+ <name>
+CURLOPT_OPENSOCKETFUNCTION returns bad socket
+ </name>
+</client>
+
+# it should be detected and an error should be reported
+<verify>
+# 7 == CURLE_COULDNT_CONNECT
+<errorcode>
+7
+</errorcode>
+</verify>
+</testcase>

tests/libtest/Makefile.inc

@@ -23,7 +23,7 @@ noinst_PROGRAMS = chkhostname libauthretry libntlmconnect                \
  lib1500 lib1501 lib1502 lib1503 lib1504 lib1505 lib1506 lib1507 lib1508 \
  lib1509 lib1510 lib1511 lib1512 lib1513 lib1514 lib1515 \
  lib1520 \
- lib1525 lib1526 lib1527 lib1528 lib1529 \
+ lib1525 lib1526 lib1527 lib1528 lib1529 lib1530 \
  lib1900 \
  lib2033
 
@@ -380,6 +380,10 @@ lib1529_SOURCES = lib1529.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1529_LDADD = $(TESTUTIL_LIBS)
 lib1529_CPPFLAGS = $(AM_CPPFLAGS) -DLIB1529
 
+lib1530_SOURCES = lib1530.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
+lib1530_LDADD = $(TESTUTIL_LIBS)
+lib1530_CPPFLAGS = $(AM_CPPFLAGS) -DLIB1530
+
 lib1900_SOURCES = lib1900.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1900_LDADD = $(TESTUTIL_LIBS)
 lib1900_CPPFLAGS = $(AM_CPPFLAGS)

tests/libtest/lib1530.c

@@ -0,0 +1,67 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, 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.
+ *
+ ***************************************************************************/
+
+#include "test.h"
+
+#include "memdebug.h"
+
+static curl_socket_t opensocket(void *clientp,
+                                curlsocktype purpose,
+                                struct curl_sockaddr *address)
+{
+  (void)purpose;
+  (void)address;
+  (void)clientp;
+  fprintf(stderr, "opensocket() returns CURL_SOCKET_BAD\n");
+  return CURL_SOCKET_BAD;
+}
+
+int test(char *URL)
+{
+  CURL *curl = NULL;
+  CURLcode res = CURLE_FAILED_INIT;
+  (void)URL;
+
+  if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
+    fprintf(stderr, "curl_global_init() failed\n");
+    return TEST_ERR_MAJOR_BAD;
+  }
+
+  if((curl = curl_easy_init()) == NULL) {
+    fprintf(stderr, "curl_easy_init() failed\n");
+    curl_global_cleanup();
+    return TEST_ERR_MAJOR_BAD;
+  }
+
+  test_setopt(curl, CURLOPT_URL, "http://99.99.99.99:9999");
+  test_setopt(curl, CURLOPT_VERBOSE, 1L);
+  test_setopt(curl, CURLOPT_OPENSOCKETFUNCTION, opensocket);
+
+  res = curl_easy_perform(curl);
+
+test_cleanup:
+
+  curl_easy_cleanup(curl);
+  curl_global_cleanup();
+
+  return (int)res;
+}