set_test_panic: added new test

3 files changed, 1680 insertions, 3 deletions

diff --git a/README b/README
index 7d355292..a330e191 100644
--- a/README
+++ b/README
@@ -84,9 +84,8 @@ library stable, we should have testcases for the following features:
 - MHD basic and digest authentication
 
 In particular, the following functions are not covered by 'make check':
-- mhd_panic_std (daemon.c); special case (abort)
+- mhd_panic_std (mhd_panic.c); special case (abort)
 - parse_options (daemon.c)
-- MHD_set_panic_func (daemon.c)
 - MHD_get_version (daemon.c)
 
 
diff --git a/src/microhttpd/Makefile.am b/src/microhttpd/Makefile.am
index 6a08fe70..8db55a9a 100644
--- a/src/microhttpd/Makefile.am
+++ b/src/microhttpd/Makefile.am
@@ -207,7 +207,8 @@ check_PROGRAMS = \
   test_client_put_chunked_steps_shutdown \
   test_client_put_chunked_steps_close \
   test_client_put_chunked_steps_hard_close \
-  test_options
+  test_options \
+  test_set_panic
 
 if HAVE_POSIX_THREADS
 if ENABLE_UPGRADE
@@ -488,3 +489,8 @@ test_client_put_chunked_steps_hard_close_SOURCES = \
   test_client_put_stop.c
 test_client_put_chunked_steps_hard_close_LDADD = \
   libmicrohttpd.la
+
+test_set_panic_SOURCES = \
+  test_set_panic.c
+test_set_panic_LDADD = \
+  libmicrohttpd.la
diff --git a/src/microhttpd/test_set_panic.c b/src/microhttpd/test_set_panic.c
new file mode 100644
index 00000000..2d81c620
--- /dev/null
+++ b/src/microhttpd/test_set_panic.c
@@ -0,0 +1,1672 @@
+/*
+     This file is part of libmicrohttpd
+     Copyright (C) 2021-2022 Evgeny Grin (Karlson2k)
+
+     libmicrohttpd is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, or (at your
+     option) any later version.
+
+     libmicrohttpd is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with libmicrohttpd; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+     Boston, MA 02110-1301, USA.
+*/
+/**
+ * @file test_set_panic.c
+ * @brief  Testcase for MHD_set_panic_func()
+ * @author Karlson2k (Evgeny Grin)
+ * @author Christian Grothoff
+ */
+#include "MHD_config.h"
+#include "platform.h"
+#include <microhttpd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif /* HAVE_STRINGS_H */
+
+#ifdef _WIN32
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif /* !WIN32_LEAN_AND_MEAN */
+#include <windows.h>
+#endif
+
+#ifndef WINDOWS
+#include <unistd.h>
+#include <sys/socket.h>
+#endif
+
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif /* HAVE_LIMITS_H */
+
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif /* HAVE_SIGNAL_H */
+
+#ifdef HAVE_SYSCTL
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif /* HAVE_SYS_TYPES_H */
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif /* HAVE_SYS_SYSCTL_H */
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif /* HAVE_SYS_SOCKET_H */
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif /* HAVE_NETINET_IN_H */
+#ifdef HAVE_NETINET_IP_H
+#include <netinet/ip.h>
+#endif /* HAVE_NETINET_IP_H */
+#ifdef HAVE_NETINET_IP_ICMP_H
+#include <netinet/ip_icmp.h>
+#endif /* HAVE_NETINET_IP_ICMP_H */
+#ifdef HAVE_NETINET_ICMP_VAR_H
+#include <netinet/icmp_var.h>
+#endif /* HAVE_NETINET_ICMP_VAR_H */
+#endif /* HAVE_SYSCTL */
+
+#include <stdio.h>
+
+#include "mhd_sockets.h" /* only macros used */
+#include "test_helpers.h"
+#include "mhd_assert.h"
+
+#if defined(MHD_CPU_COUNT) && (MHD_CPU_COUNT + 0) < 2
+#undef MHD_CPU_COUNT
+#endif
+#if ! defined(MHD_CPU_COUNT)
+#define MHD_CPU_COUNT 2
+#endif
+#if MHD_CPU_COUNT > 32
+#undef MHD_CPU_COUNT
+/* Limit to reasonable value */
+#define MHD_CPU_COUNT 32
+#endif /* MHD_CPU_COUNT > 32 */
+
+#ifndef MHD_STATICSTR_LEN_
+/**
+ * Determine length of static string / macro strings at compile time.
+ */
+#define MHD_STATICSTR_LEN_(macro) (sizeof(macro) / sizeof(char) - 1)
+#endif /* ! MHD_STATICSTR_LEN_ */
+
+#ifndef _MHD_INSTRMACRO
+/* Quoted macro parameter */
+#define _MHD_INSTRMACRO(a) #a
+#endif /* ! _MHD_INSTRMACRO */
+#ifndef _MHD_STRMACRO
+/* Quoted expanded macro parameter */
+#define _MHD_STRMACRO(a) _MHD_INSTRMACRO (a)
+#endif /* ! _MHD_STRMACRO */
+
+
+/* Could be increased to facilitate debugging */
+#define TIMEOUTS_VAL 5
+
+/* Time in ms to wait for final packets to be delivered */
+#define FINAL_PACKETS_MS 20
+
+#define EXPECTED_URI_BASE_PATH  "/a"
+
+#define REQ_HOST "localhost"
+
+#define REQ_METHOD "PUT"
+
+#define REQ_BODY "Some content data."
+
+#define REQ_LINE_END "\r\n"
+
+/* Mandatory request headers */
+#define REQ_HEADER_HOST_NAME "Host"
+#define REQ_HEADER_HOST_VALUE REQ_HOST
+#define REQ_HEADER_HOST \
+  REQ_HEADER_HOST_NAME ": " REQ_HEADER_HOST_VALUE REQ_LINE_END
+#define REQ_HEADER_UA_NAME "User-Agent"
+#define REQ_HEADER_UA_VALUE "dummyclient/0.9"
+#define REQ_HEADER_UA REQ_HEADER_UA_NAME ": " REQ_HEADER_UA_VALUE REQ_LINE_END
+
+/* Optional request headers */
+#define REQ_HEADER_CT_NAME "Content-Type"
+#define REQ_HEADER_CT_VALUE "text/plain"
+#define REQ_HEADER_CT REQ_HEADER_CT_NAME ": " REQ_HEADER_CT_VALUE REQ_LINE_END
+
+
+#if defined(HAVE___FUNC__)
+#define externalErrorExit(ignore) \
+    _externalErrorExit_func(NULL, __func__, __LINE__)
+#define externalErrorExitDesc(errDesc) \
+    _externalErrorExit_func(errDesc, __func__, __LINE__)
+#define mhdErrorExit(ignore) \
+    _mhdErrorExit_func(NULL, __func__, __LINE__)
+#define mhdErrorExitDesc(errDesc) \
+    _mhdErrorExit_func(errDesc, __func__, __LINE__)
+#elif defined(HAVE___FUNCTION__)
+#define externalErrorExit(ignore) \
+    _externalErrorExit_func(NULL, __FUNCTION__, __LINE__)
+#define externalErrorExitDesc(errDesc) \
+    _externalErrorExit_func(errDesc, __FUNCTION__, __LINE__)
+#define mhdErrorExit(ignore) \
+    _mhdErrorExit_func(NULL, __FUNCTION__, __LINE__)
+#define mhdErrorExitDesc(errDesc) \
+    _mhdErrorExit_func(errDesc, __FUNCTION__, __LINE__)
+#else
+#define externalErrorExit(ignore) _externalErrorExit_func(NULL, NULL, __LINE__)
+#define externalErrorExitDesc(errDesc) \
+  _externalErrorExit_func(errDesc, NULL, __LINE__)
+#define mhdErrorExit(ignore) _mhdErrorExit_func(NULL, NULL, __LINE__)
+#define mhdErrorExitDesc(errDesc) _mhdErrorExit_func(errDesc, NULL, __LINE__)
+#endif
+
+
+_MHD_NORETURN static void
+_externalErrorExit_func (const char *errDesc, const char *funcName, int lineNum)
+{
+  if ((NULL != errDesc) && (0 != errDesc[0]))
+    fprintf (stderr, "%s", errDesc);
+  else
+    fprintf (stderr, "System or external library call failed");
+  if ((NULL != funcName) && (0 != funcName[0]))
+    fprintf (stderr, " in %s", funcName);
+  if (0 < lineNum)
+    fprintf (stderr, " at line %d", lineNum);
+
+  fprintf (stderr, ".\nLast errno value: %d (%s)\n", (int) errno,
+           strerror (errno));
+#ifdef MHD_WINSOCK_SOCKETS
+  fprintf (stderr, "WSAGetLastError() value: %d\n", (int) WSAGetLastError ());
+#endif /* MHD_WINSOCK_SOCKETS */
+  fflush (stderr);
+  exit (99);
+}
+
+
+_MHD_NORETURN static void
+_mhdErrorExit_func (const char *errDesc, const char *funcName, int lineNum)
+{
+  if ((NULL != errDesc) && (0 != errDesc[0]))
+    fprintf (stderr, "%s", errDesc);
+  else
+    fprintf (stderr, "MHD unexpected error");
+  if ((NULL != funcName) && (0 != funcName[0]))
+    fprintf (stderr, " in %s", funcName);
+  if (0 < lineNum)
+    fprintf (stderr, " at line %d", lineNum);
+
+  fprintf (stderr, ".\nLast errno value: %d (%s)\n", (int) errno,
+           strerror (errno));
+
+  fflush (stderr);
+  exit (8);
+}
+
+
+/**
+ * Pause execution for specified number of milliseconds.
+ * @param ms the number of milliseconds to sleep
+ */
+static void
+_MHD_sleep (uint32_t ms)
+{
+#if defined(_WIN32)
+  Sleep (ms);
+#elif defined(HAVE_NANOSLEEP)
+  struct timespec slp = {ms / 1000, (ms % 1000) * 1000000};
+  struct timespec rmn;
+  int num_retries = 0;
+  while (0 != nanosleep (&slp, &rmn))
+  {
+    if (EINTR != errno)
+      externalErrorExit ();
+    if (num_retries++ > 8)
+      break;
+    slp = rmn;
+  }
+#elif defined(HAVE_USLEEP)
+  uint64_t us = ms * 1000;
+  do
+  {
+    uint64_t this_sleep;
+    if (999999 < us)
+      this_sleep = 999999;
+    else
+      this_sleep = us;
+    /* Ignore return value as it could be void */
+    usleep (this_sleep);
+    us -= this_sleep;
+  } while (us > 0);
+#else
+  externalErrorExitDesc ("No sleep function available on this system");
+#endif
+}
+
+
+/* Global parameters */
+static int verbose;                 /**< Be verbose */
+static uint16_t global_port;        /**< MHD daemons listen port number */
+
+static void
+test_global_init (void)
+{
+  if (MHD_YES != MHD_is_feature_supported (MHD_FEATURE_AUTOSUPPRESS_SIGPIPE))
+  {
+#if defined(HAVE_SIGNAL_H) && defined(SIGPIPE)
+    if (SIG_ERR == signal (SIGPIPE, SIG_IGN))
+      externalErrorExitDesc ("Error suppressing SIGPIPE signal");
+#else /* ! HAVE_SIGNAL_H || ! SIGPIPE */
+    fprintf (stderr, "Cannot suppress SIGPIPE signal.\n");
+    /* exit (77); */
+#endif
+  }
+}
+
+
+static void
+test_global_cleanup (void)
+{
+}
+
+
+/**
+ * Change socket to blocking.
+ *
+ * @param fd the socket to manipulate
+ */
+static void
+make_blocking (MHD_socket fd)
+{
+#if defined(MHD_POSIX_SOCKETS)
+  int flags;
+
+  flags = fcntl (fd, F_GETFL);
+  if (-1 == flags)
+    externalErrorExitDesc ("Cannot make socket non-blocking");
+  if ((flags & ~O_NONBLOCK) != flags)
+  {
+    if (-1 == fcntl (fd, F_SETFL, flags & ~O_NONBLOCK))
+      externalErrorExitDesc ("Cannot make socket non-blocking");
+  }
+#elif defined(MHD_WINSOCK_SOCKETS)
+  unsigned long flags = 0;
+
+  if (0 != ioctlsocket (fd, (int) FIONBIO, &flags))
+    externalErrorExitDesc ("Cannot make socket non-blocking");
+#endif /* MHD_WINSOCK_SOCKETS */
+}
+
+
+/**
+ * Change socket to non-blocking.
+ *
+ * @param fd the socket to manipulate
+ */
+static void
+make_nonblocking (MHD_socket fd)
+{
+#if defined(MHD_POSIX_SOCKETS)
+  int flags;
+
+  flags = fcntl (fd, F_GETFL);
+  if (-1 == flags)
+    externalErrorExitDesc ("Cannot make socket non-blocking");
+  if ((flags | O_NONBLOCK) != flags)
+  {
+    if (-1 == fcntl (fd, F_SETFL, flags | O_NONBLOCK))
+      externalErrorExitDesc ("Cannot make socket non-blocking");
+  }
+#elif defined(MHD_WINSOCK_SOCKETS)
+  unsigned long flags = 1;
+
+  if (0 != ioctlsocket (fd, (int) FIONBIO, &flags))
+    externalErrorExitDesc ("Cannot make socket non-blocking");
+#endif /* MHD_WINSOCK_SOCKETS */
+}
+
+
+enum _MHD_clientStage
+{
+  DUMB_CLIENT_INIT = 0,
+  DUMB_CLIENT_CONNECTING,
+  DUMB_CLIENT_CONNECTED,
+  DUMB_CLIENT_REQ_SENDING,
+  DUMB_CLIENT_REQ_SENT,
+  DUMB_CLIENT_HEADER_RECVEIVING,
+  DUMB_CLIENT_HEADER_RECVEIVED,
+  DUMB_CLIENT_BODY_RECVEIVING,
+  DUMB_CLIENT_BODY_RECVEIVED,
+  DUMB_CLIENT_FINISHING,
+  DUMB_CLIENT_FINISHED
+};
+
+struct _MHD_dumbClient
+{
+  MHD_socket sckt; /**< the socket to communicate */
+
+  int sckt_nonblock;  /**< non-zero if socket is non-blocking */
+
+  uint16_t port; /**< the port to connect to */
+
+  char *send_buf; /**< the buffer for the request, malloced */
+
+  size_t req_size; /**< the size of the request, including header */
+
+  size_t send_off; /**< the number of bytes already sent */
+
+  enum _MHD_clientStage stage;
+
+  /* the test-specific variables */
+  size_t single_send_size; /**< the maximum number of bytes to be sent by
+                                single send() */
+  size_t send_size_limit;  /**< the total number of send bytes limit */
+};
+
+struct _MHD_dumbClient *
+_MHD_dumbClient_create (uint16_t port, const char *method, const char *url,
+                        const char *add_headers,
+                        const uint8_t *req_body, size_t req_body_size,
+                        int chunked);
+
+
+void
+_MHD_dumbClient_set_send_limits (struct _MHD_dumbClient *clnt,
+                                 size_t step_size, size_t max_total_send);
+
+void
+_MHD_dumbClient_start_connect (struct _MHD_dumbClient *clnt);
+
+int
+_MHD_dumbClient_is_req_sent (struct _MHD_dumbClient *clnt);
+
+int
+_MHD_dumbClient_process (struct _MHD_dumbClient *clnt);
+
+void
+_MHD_dumbClient_get_fdsets (struct _MHD_dumbClient *clnt,
+                            MHD_socket *maxsckt,
+                            fd_set *rs, fd_set *ws, fd_set *es);
+
+
+/**
+ * Process the client data with send()/recv() as needed based on
+ * information in fd_sets.
+ * @param clnt the client to process
+ * @return non-zero if client finished processing the request,
+ *         zero otherwise.
+ */
+int
+_MHD_dumbClient_process_from_fdsets (struct _MHD_dumbClient *clnt,
+                                     fd_set *rs, fd_set *ws, fd_set *es);
+
+/**
+ * Perform full request.
+ * @param clnt the client to run
+ * @return zero if client finished processing the request,
+ *         non-zero if timeout is reached.
+ */
+int
+_MHD_dumbClient_perform (struct _MHD_dumbClient *clnt);
+
+
+/**
+ * Close the client and free internally allocated resources.
+ * @param clnt the client to close
+ */
+void
+_MHD_dumbClient_close (struct _MHD_dumbClient *clnt);
+
+
+struct _MHD_dumbClient *
+_MHD_dumbClient_create (uint16_t port, const char *method, const char *url,
+                        const char *add_headers,
+                        const uint8_t *req_body, size_t req_body_size,
+                        int chunked)
+{
+  struct _MHD_dumbClient *clnt;
+  size_t method_size;
+  size_t url_size;
+  size_t add_hdrs_size;
+  size_t buf_alloc_size;
+  char *send_buf;
+  mhd_assert (0 != port);
+  mhd_assert (NULL != req_body || 0 == req_body_size);
+  mhd_assert (0 == req_body_size || NULL != req_body);
+
+  clnt = (struct _MHD_dumbClient *) malloc (sizeof(struct _MHD_dumbClient));
+  if (NULL == clnt)
+    externalErrorExit ();
+  memset (clnt, 0, sizeof(struct _MHD_dumbClient));
+  clnt->sckt = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
+  if (MHD_INVALID_SOCKET == clnt->sckt)
+    externalErrorExitDesc ("Cannot create the client socket");
+
+#ifdef MHD_socket_nosignal_
+  if (! MHD_socket_nosignal_ (clnt->sckt))
+    externalErrorExitDesc ("Cannot suppress SIGPIPE on the client socket");
+#endif /* MHD_socket_nosignal_ */
+
+  clnt->sckt_nonblock = 0;
+  if (clnt->sckt_nonblock)
+    make_nonblocking (clnt->sckt);
+  else
+    make_blocking (clnt->sckt);
+
+  if (1)
+  { /* Always set TCP NODELAY */
+    const MHD_SCKT_OPT_BOOL_ on_val = 1;
+
+    if (0 != setsockopt (clnt->sckt, IPPROTO_TCP, TCP_NODELAY,
+                         (const void *) &on_val, sizeof (on_val)))
+      externalErrorExitDesc ("Cannot set TCP_NODELAY option");
+  }
+
+  clnt->port = port;
+
+  if (NULL != method)
+    method_size = strlen (method);
+  else
+  {
+    method = MHD_HTTP_METHOD_GET;
+    method_size = MHD_STATICSTR_LEN_ (MHD_HTTP_METHOD_GET);
+  }
+  mhd_assert (0 != method_size);
+  if (NULL != url)
+    url_size = strlen (url);
+  else
+  {
+    url = "/";
+    url_size = 1;
+  }
+  mhd_assert (0 != url_size);
+  add_hdrs_size = (NULL == add_headers) ? 0 : strlen (add_headers);
+  buf_alloc_size = 1024 + method_size + url_size
+                   + add_hdrs_size + req_body_size;
+  send_buf = (char *) malloc (buf_alloc_size);
+  if (NULL == send_buf)
+    externalErrorExit ();
+
+  clnt->req_size = 0;
+  /* Form the request line */
+  memcpy (send_buf + clnt->req_size, method, method_size);
+  clnt->req_size += method_size;
+  send_buf[clnt->req_size++] = ' ';
+  memcpy (send_buf + clnt->req_size, url, url_size);
+  clnt->req_size += url_size;
+  send_buf[clnt->req_size++] = ' ';
+  memcpy (send_buf + clnt->req_size, MHD_HTTP_VERSION_1_1,
+          MHD_STATICSTR_LEN_ (MHD_HTTP_VERSION_1_1));
+  clnt->req_size += MHD_STATICSTR_LEN_ (MHD_HTTP_VERSION_1_1);
+  send_buf[clnt->req_size++] = '\r';
+  send_buf[clnt->req_size++] = '\n';
+  /* Form the header */
+  memcpy (send_buf + clnt->req_size, REQ_HEADER_HOST,
+          MHD_STATICSTR_LEN_ (REQ_HEADER_HOST));
+  clnt->req_size += MHD_STATICSTR_LEN_ (REQ_HEADER_HOST);
+  memcpy (send_buf + clnt->req_size, REQ_HEADER_UA,
+          MHD_STATICSTR_LEN_ (REQ_HEADER_UA));
+  clnt->req_size += MHD_STATICSTR_LEN_ (REQ_HEADER_UA);
+  if ((NULL != req_body) || chunked)
+  {
+    if (! chunked)
+    {
+      int prn_size;
+      memcpy (send_buf + clnt->req_size, MHD_HTTP_HEADER_CONTENT_LENGTH ": ",
+              MHD_STATICSTR_LEN_ (MHD_HTTP_HEADER_CONTENT_LENGTH ": "));
+      clnt->req_size += MHD_STATICSTR_LEN_ (
+        MHD_HTTP_HEADER_CONTENT_LENGTH ": ");
+      prn_size = snprintf (send_buf + clnt->req_size,
+                           (buf_alloc_size - clnt->req_size),
+                           "%u", (unsigned int) req_body_size);
+      if (0 >= prn_size)
+        externalErrorExit ();
+      if ((unsigned int) prn_size >= buf_alloc_size - clnt->req_size)
+        externalErrorExit ();
+      clnt->req_size += (unsigned int) prn_size;
+      send_buf[clnt->req_size++] = '\r';
+      send_buf[clnt->req_size++] = '\n';
+    }
+    else
+    {
+      memcpy (send_buf + clnt->req_size,
+              MHD_HTTP_HEADER_TRANSFER_ENCODING ": chunked\r\n",
+              MHD_STATICSTR_LEN_ (MHD_HTTP_HEADER_TRANSFER_ENCODING \
+                                  ": chunked\r\n"));
+      clnt->req_size += MHD_STATICSTR_LEN_ (MHD_HTTP_HEADER_TRANSFER_ENCODING \
+                                            ": chunked\r\n");
+    }
+  }
+  if (0 != add_hdrs_size)
+  {
+    memcpy (send_buf + clnt->req_size, add_headers, add_hdrs_size);
+    clnt->req_size += add_hdrs_size;
+  }
+  /* Terminate header */
+  send_buf[clnt->req_size++] = '\r';
+  send_buf[clnt->req_size++] = '\n';
+
+  /* Add body (if any) */
+  if (! chunked)
+  {
+    if (0 != req_body_size)
+    {
+      memcpy (send_buf + clnt->req_size, req_body, req_body_size);
+      clnt->req_size += req_body_size;
+    }
+  }
+  else
+  {
+    if (0 != req_body_size)
+    {
+      int prn_size;
+      prn_size = snprintf (send_buf + clnt->req_size,
+                           (buf_alloc_size - clnt->req_size),
+                           "%x", (unsigned int) req_body_size);
+      if (0 >= prn_size)
+        externalErrorExit ();
+      if ((unsigned int) prn_size >= buf_alloc_size - clnt->req_size)
+        externalErrorExit ();
+      clnt->req_size += (unsigned int) prn_size;
+      send_buf[clnt->req_size++] = '\r';
+      send_buf[clnt->req_size++] = '\n';
+      memcpy (send_buf + clnt->req_size, req_body, req_body_size);
+      clnt->req_size += req_body_size;
+      send_buf[clnt->req_size++] = '\r';
+      send_buf[clnt->req_size++] = '\n';
+    }
+    send_buf[clnt->req_size++] = '0';
+    send_buf[clnt->req_size++] = '\r';
+    send_buf[clnt->req_size++] = '\n';
+    send_buf[clnt->req_size++] = '\r';
+    send_buf[clnt->req_size++] = '\n';
+  }
+  mhd_assert (clnt->req_size < buf_alloc_size);
+  clnt->send_buf = send_buf;
+
+  return clnt;
+}
+
+
+void
+_MHD_dumbClient_set_send_limits (struct _MHD_dumbClient *clnt,
+                                 size_t step_size, size_t max_total_send)
+{
+  clnt->single_send_size = step_size;
+  clnt->send_size_limit = max_total_send;
+}
+
+
+/* internal */
+static void
+_MHD_dumbClient_connect_init (struct _MHD_dumbClient *clnt)
+{
+  struct sockaddr_in sa;
+  mhd_assert (DUMB_CLIENT_INIT == clnt->stage);
+
+  sa.sin_family = AF_INET;
+  sa.sin_port = htons (clnt->port);
+  sa.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+
+  if (0 != connect (clnt->sckt, (struct sockaddr *) &sa, sizeof(sa)))
+  {
+    const int err = MHD_socket_get_error_ ();
+    if ( (MHD_SCKT_ERR_IS_ (err, MHD_SCKT_EINPROGRESS_)) ||
+         (MHD_SCKT_ERR_IS_EAGAIN_ (err)))
+      clnt->stage = DUMB_CLIENT_CONNECTING;
+    else
+      externalErrorExitDesc ("Cannot 'connect()' the client socket");
+  }
+  else
+    clnt->stage = DUMB_CLIENT_CONNECTED;
+}
+
+
+void
+_MHD_dumbClient_start_connect (struct _MHD_dumbClient *clnt)
+{
+  mhd_assert (DUMB_CLIENT_INIT == clnt->stage);
+  _MHD_dumbClient_connect_init (clnt);
+}
+
+
+/* internal */
+static void
+_MHD_dumbClient_connect_finish (struct _MHD_dumbClient *clnt)
+{
+  int err = 0;
+  socklen_t err_size = sizeof(err);
+  mhd_assert (DUMB_CLIENT_CONNECTING == clnt->stage);
+  if (0 != getsockopt (clnt->sckt, SOL_SOCKET, SO_ERROR,
+                       (void *) &err, &err_size))
+    externalErrorExitDesc ("'getsockopt()' call failed");
+  if (0 != err)
+    externalErrorExitDesc ("Socket connect() failed");
+  clnt->stage = DUMB_CLIENT_CONNECTED;
+}
+
+
+/* internal */
+static void
+_MHD_dumbClient_send_req (struct _MHD_dumbClient *clnt)
+{
+  size_t send_size;
+  ssize_t res;
+  mhd_assert (DUMB_CLIENT_CONNECTED <= clnt->stage);
+  mhd_assert (DUMB_CLIENT_REQ_SENT > clnt->stage);
+  mhd_assert (clnt->req_size > clnt->send_off);
+
+  send_size = (((0 != clnt->send_size_limit) &&
+                (clnt->req_size > clnt->send_size_limit)) ?
+               clnt->send_size_limit : clnt->req_size) - clnt->send_off;
+  mhd_assert (0 != send_size);
+  if ((0 != clnt->single_send_size) &&
+      (clnt->single_send_size < send_size))
+    send_size = clnt->single_send_size;
+
+  res = MHD_send_ (clnt->sckt, clnt->send_buf + clnt->send_off, send_size);
+
+  if (res < 0)
+  {
+    const int err = MHD_socket_get_error_ ();
+    if (MHD_SCKT_ERR_IS_EAGAIN_ (err))
+      return;
+    if (MHD_SCKT_ERR_IS_EINTR_ (err))
+      return;
+    if (MHD_SCKT_ERR_IS_REMOTE_DISCNN_ (err))
+      mhdErrorExitDesc ("The connection was aborted by MHD");
+    if (MHD_SCKT_ERR_IS_ (err, MHD_SCKT_EPIPE_))
+      mhdErrorExitDesc ("The connection was shut down on MHD side");
+    externalErrorExitDesc ("Unexpected network error");
+  }
+  clnt->send_off += (size_t) res;
+  mhd_assert (clnt->send_off <= clnt->req_size);
+  mhd_assert (clnt->send_off <= clnt->send_size_limit || \
+              0 == clnt->send_size_limit);
+  if (clnt->req_size == clnt->send_off)
+    clnt->stage = DUMB_CLIENT_REQ_SENT;
+  if ((0 != clnt->send_size_limit) &&
+      (clnt->send_size_limit == clnt->send_off))
+    clnt->stage = DUMB_CLIENT_FINISHING;
+}
+
+
+/* internal */
+static void
+_MHD_dumbClient_recv_reply (struct _MHD_dumbClient *clnt)
+{
+  (void) clnt;
+  externalErrorExitDesc ("Not implemented for this test");
+}
+
+
+int
+_MHD_dumbClient_is_req_sent (struct _MHD_dumbClient *clnt)
+{
+  return DUMB_CLIENT_REQ_SENT <= clnt->stage;
+}
+
+
+/* internal */
+static void
+_MHD_dumbClient_socket_close (struct _MHD_dumbClient *clnt)
+{
+  if (MHD_INVALID_SOCKET != clnt->sckt)
+  {
+    if (! MHD_socket_close_ (clnt->sckt))
+      externalErrorExitDesc ("Unexpected error while closing " \
+                             "the client socket");
+    clnt->sckt = MHD_INVALID_SOCKET;
+  }
+}
+
+
+/* internal */
+static void
+_MHD_dumbClient_finalize (struct _MHD_dumbClient *clnt)
+{
+  if (MHD_INVALID_SOCKET != clnt->sckt)
+  {
+    if (0 != shutdown (clnt->sckt, SHUT_WR))
+    {
+      const int err = MHD_socket_get_error_ ();
+      if (! MHD_SCKT_ERR_IS_ (err, MHD_SCKT_ENOTCONN_) &&
+          ! MHD_SCKT_ERR_IS_REMOTE_DISCNN_ (err))
+        mhdErrorExitDesc ("Unexpected error when shutting down " \
+                          "the client socket");
+    }
+  }
+  clnt->stage = DUMB_CLIENT_FINISHED;
+}
+
+
+/* internal */
+static int
+_MHD_dumbClient_needs_send (const struct _MHD_dumbClient *clnt)
+{
+  return ((DUMB_CLIENT_CONNECTING <= clnt->stage) &&
+          (DUMB_CLIENT_REQ_SENT > clnt->stage)) ||
+         (DUMB_CLIENT_FINISHING == clnt->stage);
+}
+
+
+/* internal */
+static int
+_MHD_dumbClient_needs_recv (const struct _MHD_dumbClient *clnt)
+{
+  return (DUMB_CLIENT_HEADER_RECVEIVING <= clnt->stage) &&
+         (DUMB_CLIENT_BODY_RECVEIVED > clnt->stage);
+}
+
+
+/* internal */
+/**
+ * Check whether the client needs unconditionally process the data.
+ * @param clnt the client to check
+ * @return non-zero if client needs unconditionally process the data,
+ *         zero otherwise.
+ */
+static int
+_MHD_dumbClient_needs_process (const struct _MHD_dumbClient *clnt)
+{
+  switch (clnt->stage)
+  {
+  case DUMB_CLIENT_INIT:
+  case DUMB_CLIENT_REQ_SENT:
+  case DUMB_CLIENT_HEADER_RECVEIVED:
+  case DUMB_CLIENT_BODY_RECVEIVED:
+    return ! 0;
+  default:
+    return 0;
+  }
+  return 0; /* Should be unreachable */
+}
+
+
+/**
+ * Process the client data with send()/recv() as needed.
+ * @param clnt the client to process
+ * @return non-zero if client finished processing the request,
+ *         zero otherwise.
+ */
+int
+_MHD_dumbClient_process (struct _MHD_dumbClient *clnt)
+{
+  do
+  {
+    switch (clnt->stage)
+    {
+    case DUMB_CLIENT_INIT:
+      _MHD_dumbClient_connect_init (clnt);
+      break;
+    case DUMB_CLIENT_CONNECTING:
+      _MHD_dumbClient_connect_finish (clnt);
+      break;
+    case DUMB_CLIENT_CONNECTED:
+    case DUMB_CLIENT_REQ_SENDING:
+      _MHD_dumbClient_send_req (clnt);
+      break;
+    case DUMB_CLIENT_REQ_SENT:
+      mhd_assert (0);
+      clnt->stage = DUMB_CLIENT_HEADER_RECVEIVING;
+      break;
+    case DUMB_CLIENT_HEADER_RECVEIVING:
+      _MHD_dumbClient_recv_reply (clnt);
+      break;
+    case DUMB_CLIENT_HEADER_RECVEIVED:
+      clnt->stage = DUMB_CLIENT_BODY_RECVEIVING;
+      break;
+    case DUMB_CLIENT_BODY_RECVEIVING:
+      _MHD_dumbClient_recv_reply (clnt);
+      break;
+    case DUMB_CLIENT_BODY_RECVEIVED:
+      clnt->stage = DUMB_CLIENT_FINISHING;
+      break;
+    case DUMB_CLIENT_FINISHING:
+      _MHD_dumbClient_finalize (clnt);
+      break;
+    default:
+      mhd_assert (0);
+      mhdErrorExit ();
+    }
+  } while (_MHD_dumbClient_needs_process (clnt));
+  return DUMB_CLIENT_FINISHED == clnt->stage;
+}
+
+
+void
+_MHD_dumbClient_get_fdsets (struct _MHD_dumbClient *clnt,
+                            MHD_socket *maxsckt,
+                            fd_set *rs, fd_set *ws, fd_set *es)
+{
+  mhd_assert (NULL != rs);
+  mhd_assert (NULL != ws);
+  mhd_assert (NULL != es);
+  if (DUMB_CLIENT_FINISHED > clnt->stage)
+  {
+    if (MHD_INVALID_SOCKET != clnt->sckt)
+    {
+      if ( (MHD_INVALID_SOCKET == *maxsckt) ||
+           (clnt->sckt > *maxsckt) )
+        *maxsckt = clnt->sckt;
+      if (_MHD_dumbClient_needs_recv (clnt))
+        FD_SET (clnt->sckt, rs);
+      if (_MHD_dumbClient_needs_send (clnt))
+        FD_SET (clnt->sckt, ws);
+      FD_SET (clnt->sckt, es);
+    }
+  }
+}
+
+
+/**
+ * Process the client data with send()/recv() as needed based on
+ * information in fd_sets.
+ * @param clnt the client to process
+ * @return non-zero if client finished processing the request,
+ *         zero otherwise.
+ */
+int
+_MHD_dumbClient_process_from_fdsets (struct _MHD_dumbClient *clnt,
+                                     fd_set *rs, fd_set *ws, fd_set *es)
+{
+  if (_MHD_dumbClient_needs_process (clnt))
+    return _MHD_dumbClient_process (clnt);
+  else if (MHD_INVALID_SOCKET != clnt->sckt)
+  {
+    if (_MHD_dumbClient_needs_recv (clnt) && FD_ISSET (clnt->sckt, rs))
+      return _MHD_dumbClient_process (clnt);
+    else if (_MHD_dumbClient_needs_send (clnt) && FD_ISSET (clnt->sckt, ws))
+      return _MHD_dumbClient_process (clnt);
+    else if (FD_ISSET (clnt->sckt, es))
+      return _MHD_dumbClient_process (clnt);
+  }
+  return DUMB_CLIENT_FINISHED == clnt->stage;
+}
+
+
+/**
+ * Perform full request.
+ * @param clnt the client to run
+ * @return zero if client finished processing the request,
+ *         non-zero if timeout is reached.
+ */
+int
+_MHD_dumbClient_perform (struct _MHD_dumbClient *clnt)
+{
+  time_t start;
+  time_t now;
+  start = time (NULL);
+  now = start;
+  do
+  {
+    fd_set rs;
+    fd_set ws;
+    fd_set es;
+    MHD_socket maxMhdSk;
+    struct timeval tv;
+
+    FD_ZERO (&rs);
+    FD_ZERO (&ws);
+    FD_ZERO (&es);
+
+    if (! _MHD_dumbClient_needs_process (clnt))
+    {
+      maxMhdSk = MHD_INVALID_SOCKET;
+      _MHD_dumbClient_get_fdsets (clnt, &maxMhdSk, &rs, &ws, &es);
+      mhd_assert (now >= start);
+#ifndef _WIN32
+      tv.tv_sec = (time_t) (TIMEOUTS_VAL * 2 - (now - start) + 1);
+#else
+      tv.tv_sec = (long) (TIMEOUTS_VAL * 2 - (now - start) + 1);
+#endif
+      tv.tv_usec = 250 * 1000;
+      if (-1 == select ((int) (maxMhdSk + 1), &rs, &ws, &es, &tv))
+      {
+#ifdef MHD_POSIX_SOCKETS
+        if (EINTR != errno)
+          externalErrorExitDesc ("Unexpected select() error");
+#else  /* ! MHD_POSIX_SOCKETS */
+        mhd_assert ((0 != rs.fd_count) || (0 != ws.fd_count) || \
+                    (0 != es.fd_count));
+        externalErrorExitDesc ("Unexpected select() error");
+        _MHD_sleep ((uint32_t) (tv.tv_sec * 1000 + tv.tv_usec / 1000));
+#endif /* ! MHD_POSIX_SOCKETS */
+        continue;
+      }
+      if (_MHD_dumbClient_process_from_fdsets (clnt, &rs, &ws, &es))
+        return 0;
+    }
+    /* Use double timeout value here as MHD must catch timeout situations
+     * in this test. Timeout in client as a last resort. */
+  } while ((now = time (NULL)) - start <= (TIMEOUTS_VAL * 2));
+  return 1;
+}
+
+
+/**
+ * Close the client and free internally allocated resources.
+ * @param clnt the client to close
+ */
+void
+_MHD_dumbClient_close (struct _MHD_dumbClient *clnt)
+{
+  if (DUMB_CLIENT_FINISHED != clnt->stage)
+    _MHD_dumbClient_finalize (clnt);
+  _MHD_dumbClient_socket_close (clnt);
+  if (NULL != clnt->send_buf)
+  {
+    free ((void *) clnt->send_buf);
+    clnt->send_buf = NULL;
+  }
+  free (clnt);
+}
+
+
+static void
+socket_cb (void *cls,
+           struct MHD_Connection *c,
+           void **socket_context,
+           enum MHD_ConnectionNotificationCode toe)
+{
+  (void) cls;            /* Unused */
+  (void) socket_context; /* Unused */
+  (void) toe;            /* Unused */
+
+  MHD_suspend_connection (c); /* Should trigger panic */
+  mhdErrorExitDesc ("Function \"MHD_suspend_connection()\" succeed, while " \
+                    "it must fail as daemon was started without MHD_ALLOW_SUSPEND_RESUME " \
+                    "flag");
+}
+
+
+struct ahc_cls_type
+{
+  const char *volatile rp_data;
+  volatile size_t rp_data_size;
+  const char *volatile rq_method;
+  const char *volatile rq_url;
+  const char *volatile req_body;
+  volatile unsigned int cb_called; /* Non-zero indicates that callback was called at least one time */
+  size_t req_body_size; /**< The number of bytes in @a req_body */
+  size_t req_body_uploaded; /* Updated by callback */
+};
+
+
+static enum MHD_Result
+ahcCheck (void *cls,
+          struct MHD_Connection *connection,
+          const char *url,
+          const char *method,
+          const char *version,
+          const char *upload_data, size_t *upload_data_size,
+          void **req_cls)
+{
+  static int marker;
+  enum MHD_Result ret;
+  struct ahc_cls_type *const param = (struct ahc_cls_type *) cls;
+  (void) connection; /* Unused */
+
+  if (NULL == param)
+    mhdErrorExitDesc ("cls parameter is NULL");
+  param->cb_called++;
+
+  if (0 != strcmp (version, MHD_HTTP_VERSION_1_1))
+    mhdErrorExitDesc ("Unexpected HTTP version");
+
+  if (0 != strcmp (url, param->rq_url))
+    mhdErrorExitDesc ("Unexpected URI");
+
+  if (0 != strcmp (param->rq_method, method))
+    mhdErrorExitDesc ("Unexpected request method");
+
+  if (NULL == upload_data_size)
+    mhdErrorExitDesc ("'upload_data_size' pointer is NULL");
+
+  if (0 != *upload_data_size)
+  {
+    const char *const upload_body = param->req_body;
+    if (NULL == upload_data)
+      mhdErrorExitDesc ("'upload_data' is NULL while " \
+                        "'*upload_data_size' value is not zero");
+    if (NULL == upload_body)
+      mhdErrorExitDesc ("'*upload_data_size' value is not zero " \
+                        "while no request body is expected");
+    if (param->req_body_uploaded + *upload_data_size > param->req_body_size)
+    {
+      fprintf (stderr, "Too large upload body received. Got %u, expected %u",
+               (unsigned int) (param->req_body_uploaded + *upload_data_size),
+               (unsigned int) param->req_body_size);
+      mhdErrorExit ();
+    }
+    if (0 != memcmp (upload_data, upload_body + param->req_body_uploaded,
+                     *upload_data_size))
+    {
+      fprintf (stderr, "Unexpected request body at offset %u: " \
+               "'%.*s', expected: '%.*s'\n",
+               (unsigned int) param->req_body_uploaded,
+               (int) *upload_data_size, upload_data,
+               (int) *upload_data_size, upload_body + param->req_body_uploaded);
+      mhdErrorExit ();
+    }
+    param->req_body_uploaded += *upload_data_size;
+    *upload_data_size = 0;
+  }
+
+  if (&marker != *req_cls)
+  {
+    /* The first call of the callback for this connection */
+    mhd_assert (NULL == upload_data);
+    param->req_body_uploaded = 0;
+
+    *req_cls = &marker;
+    return MHD_YES;
+  }
+
+  if (NULL != upload_data)
+    return MHD_YES; /* Full request has not been received so far */
+
+#if 0 /* Code unused in this test */
+  struct MHD_Response *response;
+  response = MHD_create_response_from_buffer (param->rp_data_size,
+                                              (void *) param->rp_data,
+                                              MHD_RESPMEM_MUST_COPY);
+  if (NULL == response)
+    mhdErrorExitDesc ("Failed to create response");
+
+  ret = MHD_queue_response (connection,
+                            MHD_HTTP_OK,
+                            response);
+  MHD_destroy_response (response);
+  if (MHD_YES != ret)
+    mhdErrorExitDesc ("Failed to queue response");
+#else
+  if (NULL == upload_data)
+    mhdErrorExitDesc ("Full request received, " \
+                      "while incomplete request expected");
+  ret = MHD_NO;
+#endif
+
+  return ret;
+}
+
+
+struct simpleQueryParams
+{
+  /* Destination path for HTTP query */
+  const char *queryPath;
+
+  /* Custom query method, NULL for default */
+  const char *method;
+
+  /* Destination port for HTTP query */
+  uint16_t queryPort;
+
+  /* Additional request headers, static */
+  const char *headers;
+
+  /* NULL for request without body */
+  const uint8_t *req_body;
+  size_t req_body_size;
+
+  /* Non-zero to use chunked encoding for request body */
+  int chunked;
+
+  /* Max size of data for single 'send()' call */
+  size_t step_size;
+
+  /* Limit for total amount of sent data */
+  size_t total_send_max;
+
+  /* HTTP query result error flag */
+  volatile int queryError;
+
+  /* Response HTTP code, zero if no response */
+  volatile int responseCode;
+};
+
+
+/* returns non-zero if timed-out */
+static int
+performQueryExternal (struct MHD_Daemon *d, struct _MHD_dumbClient *clnt)
+{
+  time_t start;
+  struct timeval tv;
+  int ret;
+  const union MHD_DaemonInfo *di;
+  MHD_socket lstn_sk;
+  int client_accepted;
+  int full_req_recieved;
+  int full_req_sent;
+  int some_data_recieved;
+
+  di = MHD_get_daemon_info (d, MHD_DAEMON_INFO_LISTEN_FD);
+  if (NULL == di)
+    mhdErrorExitDesc ("Cannot get listener socket");
+  lstn_sk = di->listen_fd;
+
+  ret = 1; /* will be replaced with real result */
+  client_accepted = 0;
+
+  _MHD_dumbClient_start_connect (clnt);
+
+  full_req_recieved = 0;
+  some_data_recieved = 0;
+  start = time (NULL);
+  do
+  {
+    fd_set rs;
+    fd_set ws;
+    fd_set es;
+    MHD_socket maxMhdSk;
+    int num_ready;
+    int do_client; /**< Process data in client */
+
+    maxMhdSk = MHD_INVALID_SOCKET;
+    FD_ZERO (&rs);
+    FD_ZERO (&ws);
+    FD_ZERO (&es);
+    if (NULL == clnt)
+    {
+      /* client has finished, check whether MHD is still
+       * processing any connections */
+      unsigned long long to;
+      full_req_sent = 1;
+      do_client = 0;
+      if (client_accepted && (MHD_YES != MHD_get_timeout (d, &to)))
+      {
+        ret = 0;
+        break; /* MHD finished as well */
+      }
+    }
+    else
+    {
+      full_req_sent = _MHD_dumbClient_is_req_sent (clnt);
+      if (! full_req_sent)
+        do_client = 1; /* Request hasn't been sent yet, send the data */
+      else
+      {
+        /* All request data has been sent.
+         * Client will close the socket as the next step. */
+        if (full_req_recieved)
+          do_client = 1; /* All data has been received by the MHD */
+        else if (some_data_recieved)
+        {
+          /* at least something was received by the MHD */
+          do_client = 1;
+        }
+        else
+        {
+          /* The MHD must receive at least something before closing
+           * the connection. */
+          do_client = 0;
+        }
+      }
+
+      if (do_client)
+        _MHD_dumbClient_get_fdsets (clnt, &maxMhdSk, &rs, &ws, &es);
+    }
+    if (MHD_YES != MHD_get_fdset (d, &rs, &ws, &es, &maxMhdSk))
+      mhdErrorExitDesc ("MHD_get_fdset() failed");
+    if (do_client)
+    {
+      tv.tv_sec = 1;
+      tv.tv_usec = 250 * 1000;
+    }
+    else
+    { /* Request completely sent but not yet fully received */
+      tv.tv_sec = 0;
+      tv.tv_usec = FINAL_PACKETS_MS * 1000;
+    }
+    num_ready = select ((int) (maxMhdSk + 1), &rs, &ws, &es, &tv);
+    if (-1 == num_ready)
+    {
+#ifdef MHD_POSIX_SOCKETS
+      if (EINTR != errno)
+        externalErrorExitDesc ("Unexpected select() error");
+#else
+      if ((WSAEINVAL != WSAGetLastError ()) ||
+          (0 != rs.fd_count) || (0 != ws.fd_count) || (0 != es.fd_count) )
+        externalErrorExitDesc ("Unexpected select() error");
+      _MHD_sleep ((uint32_t) (tv.tv_sec * 1000 + tv.tv_usec / 1000));
+#endif
+      continue;
+    }
+    if (0 == num_ready)
+    { /* select() finished by timeout, looks like no more packets are pending */
+      if (do_client)
+        externalErrorExitDesc ("Timeout waiting for sockets");
+      if (full_req_sent && (! full_req_recieved))
+        full_req_recieved = 1;
+    }
+    if (full_req_recieved)
+      mhdErrorExitDesc ("Full request has been received by MHD, while it "
+                        "must be aborted by the panic function");
+    if (MHD_YES != MHD_run_from_select (d, &rs, &ws, &es))
+      mhdErrorExitDesc ("MHD_run_from_select() failed");
+    if (! client_accepted)
+      client_accepted = FD_ISSET (lstn_sk, &rs);
+    else
+    { /* Client connection was already accepted by MHD */
+      if (! some_data_recieved)
+      {
+        if (! do_client)
+        {
+          if (0 != num_ready)
+          { /* Connection was accepted before, "ready" socket means data */
+            some_data_recieved = 1;
+          }
+        }
+        else
+        {
+          if (2 == num_ready)
+            some_data_recieved = 1;
+          else if ((1 == num_ready) &&
+                   ((MHD_INVALID_SOCKET == clnt->sckt) ||
+                    ! FD_ISSET (clnt->sckt, &ws)))
+            some_data_recieved = 1;
+        }
+      }
+    }
+    if (do_client)
+    {
+      if (_MHD_dumbClient_process_from_fdsets (clnt, &rs, &ws, &es))
+        clnt = NULL;
+    }
+    /* Use double timeout value here so MHD would be able to catch timeout
+     * internally */
+  } while (time (NULL) - start <= (TIMEOUTS_VAL * 2));
+
+  return ret;
+}
+
+
+/* Returns zero for successful response and non-zero for failed response */
+static int
+doClientQueryInThread (struct MHD_Daemon *d,
+                       struct simpleQueryParams *p)
+{
+  const union MHD_DaemonInfo *dinfo;
+  struct _MHD_dumbClient *c;
+  int errornum;
+  int use_external_poll;
+
+  dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_FLAGS);
+  if (NULL == dinfo)
+    mhdErrorExitDesc ("MHD_get_daemon_info() failed");
+  use_external_poll = (0 == (dinfo->flags
+                             & MHD_USE_INTERNAL_POLLING_THREAD));
+
+  if (0 == p->queryPort)
+    externalErrorExit ();
+
+  c = _MHD_dumbClient_create (p->queryPort, p->method, p->queryPath,
+                              p->headers, p->req_body, p->req_body_size,
+                              p->chunked);
+  _MHD_dumbClient_set_send_limits (c, p->step_size, p->total_send_max);
+
+  /* 'internal' polling should not be used in this test */
+  mhd_assert (use_external_poll);
+  if (! use_external_poll)
+    errornum = _MHD_dumbClient_perform (c);
+  else
+    errornum = performQueryExternal (d, c);
+
+  if (errornum)
+    fprintf (stderr, "Request timeout out.\n");
+  else
+    mhdErrorExitDesc ("Request succeed, but it must fail");
+
+  _MHD_dumbClient_close (c);
+
+  return errornum;
+}
+
+
+/* Perform test queries, shut down MHD daemon, and free parameters */
+static unsigned int
+performTestQueries (struct MHD_Daemon *d, uint16_t d_port,
+                    struct ahc_cls_type *ahc_param)
+{
+  struct simpleQueryParams qParam;
+
+  /* Common parameters, to be individually overridden by specific test cases
+   * if needed */
+  qParam.queryPort = d_port;
+  qParam.method = MHD_HTTP_METHOD_PUT;
+  qParam.queryPath = EXPECTED_URI_BASE_PATH;
+  qParam.headers = REQ_HEADER_CT;
+  qParam.req_body = (const uint8_t *) REQ_BODY;
+  qParam.req_body_size = MHD_STATICSTR_LEN_ (REQ_BODY);
+  qParam.chunked = 0;
+  qParam.step_size = 0;
+
+  ahc_param->rq_url = EXPECTED_URI_BASE_PATH;
+  ahc_param->rq_method = MHD_HTTP_METHOD_PUT;
+  ahc_param->rp_data = "~";
+  ahc_param->rp_data_size = 1;
+  ahc_param->req_body = (const char *) qParam.req_body;
+  ahc_param->req_body_size = qParam.req_body_size;
+
+  /* Make sure that maximum size is tested */
+  /* To be updated by callbacks */
+  ahc_param->cb_called = 0;
+
+  if (0 != doClientQueryInThread (d, &qParam))
+    fprintf (stderr, "FAILED: client query failed.");
+
+  MHD_stop_daemon (d);
+  free (ahc_param);
+
+  return 1; /* Always error if reached this point */
+}
+
+
+enum testMhdThreadsType
+{
+  testMhdThreadExternal              = 0,
+  testMhdThreadInternal              = MHD_USE_INTERNAL_POLLING_THREAD,
+  testMhdThreadInternalPerConnection = MHD_USE_THREAD_PER_CONNECTION
+                                       | MHD_USE_INTERNAL_POLLING_THREAD,
+  testMhdThreadInternalPool
+};
+
+enum testMhdPollType
+{
+  testMhdPollBySelect = 0,
+  testMhdPollByPoll   = MHD_USE_POLL,
+  testMhdPollByEpoll  = MHD_USE_EPOLL,
+  testMhdPollAuto     = MHD_USE_AUTO
+};
+
+/* Get number of threads for thread pool depending
+ * on used poll function and test type. */
+static unsigned int
+testNumThreadsForPool (enum testMhdPollType pollType)
+{
+  unsigned int numThreads = MHD_CPU_COUNT;
+  (void) pollType; /* Don't care about pollType for this test */
+  return numThreads; /* No practical limit for non-cleanup test */
+}
+
+
+#define PANIC_MAGIC_CHECK 1133
+
+static void
+myPanicCallback (void *cls,
+                 const char *file,
+                 unsigned int line,
+                 const char *reason)
+{
+  int *const param = (int *) cls;
+  if (NULL == cls)
+    mhdErrorExitDesc ("The 'cls' parameter is NULL");
+  if (PANIC_MAGIC_CHECK != *param)
+    mhdErrorExitDesc ("Wrong '*cls' value");
+#ifdef HAVE_MESSAGES
+  if (NULL == file)
+    mhdErrorExitDesc ("The 'file' parameter is NULL");
+  if (NULL == reason)
+    mhdErrorExitDesc ("The 'reason' parameter is NULL");
+#else  /* ! HAVE_MESSAGES */
+  if (NULL != file)
+    mhdErrorExitDesc ("The 'file' parameter is not NULL");
+  if (NULL != reason)
+    mhdErrorExitDesc ("The 'reason' parameter is not NULL");
+#endif /* ! HAVE_MESSAGES */
+  fflush (stderr);
+  fflush (stdout);
+  printf ("User panic function has been called from file '%s' at line '%u' "
+          "with the reason:\n%s", file, line,
+          ((NULL != reason) ? reason : "(NULL)\n"));
+  fflush (stdout);
+  exit (0);
+}
+
+
+static struct MHD_Daemon *
+startTestMhdDaemon (enum testMhdThreadsType thrType,
+                    enum testMhdPollType pollType, uint16_t *pport,
+                    struct ahc_cls_type **ahc_param)
+{
+  struct MHD_Daemon *d;
+  const union MHD_DaemonInfo *dinfo;
+  static int magic_panic_param = PANIC_MAGIC_CHECK;
+
+  if (NULL == ahc_param)
+    externalErrorExit ();
+
+  *ahc_param = (struct ahc_cls_type *) malloc (sizeof(struct ahc_cls_type));
+  if (NULL == *ahc_param)
+    externalErrorExit ();
+
+  if ( (0 == *pport) &&
+       (MHD_NO == MHD_is_feature_supported (MHD_FEATURE_AUTODETECT_BIND_PORT)) )
+  {
+    *pport = 4190;
+  }
+
+  MHD_set_panic_func (&myPanicCallback, (void *) &magic_panic_param);
+
+  if (testMhdThreadInternalPool != thrType)
+    d = MHD_start_daemon (((unsigned int) thrType) | ((unsigned int) pollType)
+                          | (verbose ? MHD_USE_ERROR_LOG : 0),
+                          *pport, NULL, NULL,
+                          &ahcCheck, *ahc_param,
+                          MHD_OPTION_NOTIFY_CONNECTION, &socket_cb,
+                          NULL,
+                          MHD_OPTION_CONNECTION_TIMEOUT,
+                          (unsigned) TIMEOUTS_VAL,
+                          MHD_OPTION_END);
+  else
+    d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD
+                          | ((unsigned int) pollType)
+                          | (verbose ? MHD_USE_ERROR_LOG : 0),
+                          *pport, NULL, NULL,
+                          &ahcCheck, *ahc_param,
+                          MHD_OPTION_THREAD_POOL_SIZE,
+                          testNumThreadsForPool (pollType),
+                          MHD_OPTION_NOTIFY_CONNECTION, &socket_cb,
+                          NULL,
+                          MHD_OPTION_CONNECTION_TIMEOUT,
+                          (unsigned) TIMEOUTS_VAL,
+                          MHD_OPTION_END);
+
+  if (NULL == d)
+    mhdErrorExitDesc ("Failed to start MHD daemon");
+
+  if (0 == *pport)
+  {
+    dinfo = MHD_get_daemon_info (d, MHD_DAEMON_INFO_BIND_PORT);
+    if ((NULL == dinfo) || (0 == dinfo->port))
+      mhdErrorExitDesc ("MHD_get_daemon_info() failed");
+    *pport = dinfo->port;
+    if (0 == global_port)
+      global_port = *pport; /* Reuse the same port for all tests */
+  }
+
+  return d;
+}
+
+
+/* Test runners */
+
+
+static unsigned int
+testExternalGet (void)
+{
+  struct MHD_Daemon *d;
+  uint16_t d_port = global_port; /* Daemon's port */
+  struct ahc_cls_type *ahc_param;
+
+  d = startTestMhdDaemon (testMhdThreadExternal, testMhdPollBySelect, &d_port,
+                          &ahc_param);
+
+  return performTestQueries (d, d_port, ahc_param);
+}
+
+
+#if 0 /* disabled runners, not suitable for this test */
+static unsigned int
+testInternalGet (enum testMhdPollType pollType)
+{
+  struct MHD_Daemon *d;
+  uint16_t d_port = global_port; /* Daemon's port */
+  struct ahc_cls_type *ahc_param;
+  struct check_uri_cls *uri_cb_param;
+  struct term_notif_cb_param *term_result;
+
+  d = startTestMhdDaemon (testMhdThreadInternal, pollType, &d_port,
+                          &ahc_param, &uri_cb_param, &term_result);
+
+  return performTestQueries (d, d_port, ahc_param, uri_cb_param, term_result);
+}
+
+
+static int
+testMultithreadedGet (enum testMhdPollType pollType)
+{
+  struct MHD_Daemon *d;
+  uint16_t d_port = global_port; /* Daemon's port */
+  struct ahc_cls_type *ahc_param;
+  struct check_uri_cls *uri_cb_param;
+  struct term_notif_cb_param *term_result;
+
+  d = startTestMhdDaemon (testMhdThreadInternalPerConnection, pollType, &d_port,
+                          &ahc_param, &uri_cb_param);
+  return performTestQueries (d, d_port, ahc_param, uri_cb_param, term_result);
+}
+
+
+static unsigned int
+testMultithreadedPoolGet (enum testMhdPollType pollType)
+{
+  struct MHD_Daemon *d;
+  uint16_t d_port = global_port; /* Daemon's port */
+  struct ahc_cls_type *ahc_param;
+  struct check_uri_cls *uri_cb_param;
+  struct term_notif_cb_param *term_result;
+
+  d = startTestMhdDaemon (testMhdThreadInternalPool, pollType, &d_port,
+                          &ahc_param, &uri_cb_param);
+  return performTestQueries (d, d_port, ahc_param, uri_cb_param, term_result);
+}
+
+
+#endif /* disabled runners, not suitable for this test */
+
+int
+main (int argc, char *const *argv)
+{
+  unsigned int errorCount = 0;
+  unsigned int test_result = 0;
+  verbose = 0;
+
+  (void) has_in_name; /* Unused, mute compiler warning */
+  if ((NULL == argv) || (0 == argv[0]))
+    return 99;
+  verbose = ! (has_param (argc, argv, "-q") ||
+               has_param (argc, argv, "--quiet") ||
+               has_param (argc, argv, "-s") ||
+               has_param (argc, argv, "--silent"));
+
+  test_global_init ();
+
+  /* Could be set to non-zero value to enforce using specific port
+   * in the test */
+  global_port = 0;
+  test_result = testExternalGet ();
+  if (test_result)
+    fprintf (stderr, "FAILED: testExternalGet (). Result: %u.\n", test_result);
+  else if (verbose)
+    printf ("PASSED: testExternalGet ().\n");
+  errorCount += test_result;
+#if 0 /* disabled runners, not suitable for this test */
+  if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_THREADS))
+  {
+    test_result = testInternalGet (testMhdPollAuto);
+    if (test_result)
+      fprintf (stderr, "FAILED: testInternalGet (testMhdPollAuto). "
+               "Result: %u.\n",
+               test_result);
+    else if (verbose)
+      printf ("PASSED: testInternalGet (testMhdPollBySelect).\n");
+    errorCount += test_result;
+#ifdef _MHD_HEAVY_TESTS
+    /* Actually tests are not heavy, but took too long to complete while
+     * not really provide any additional results. */
+    test_result = testInternalGet (testMhdPollBySelect);
+    if (test_result)
+      fprintf (stderr, "FAILED: testInternalGet (testMhdPollBySelect). "
+               "Result: %u.\n",
+               test_result);
+    else if (verbose)
+      printf ("PASSED: testInternalGet (testMhdPollBySelect).\n");
+    errorCount += test_result;
+    test_result = testMultithreadedPoolGet (testMhdPollBySelect);
+    if (test_result)
+      fprintf (stderr,
+               "FAILED: testMultithreadedPoolGet (testMhdPollBySelect). "
+               "Result: %u.\n",
+               test_result);
+    else if (verbose)
+      printf ("PASSED: testMultithreadedPoolGet (testMhdPollBySelect).\n");
+    errorCount += test_result;
+    test_result = testMultithreadedGet (testMhdPollBySelect);
+    if (test_result)
+      fprintf (stderr,
+               "FAILED: testMultithreadedGet (testMhdPollBySelect). "
+               "Result: %u.\n",
+               test_result);
+    else if (verbose)
+      printf ("PASSED: testMultithreadedGet (testMhdPollBySelect).\n");
+    errorCount += test_result;
+    if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_POLL))
+    {
+      test_result = testInternalGet (testMhdPollByPoll);
+      if (test_result)
+        fprintf (stderr, "FAILED: testInternalGet (testMhdPollByPoll). "
+                 "Result: %u.\n",
+                 test_result);
+      else if (verbose)
+        printf ("PASSED: testInternalGet (testMhdPollByPoll).\n");
+      errorCount += test_result;
+    }
+    if (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_EPOLL))
+    {
+      test_result = testInternalGet (testMhdPollByEpoll);
+      if (test_result)
+        fprintf (stderr, "FAILED: testInternalGet (testMhdPollByEpoll). "
+                 "Result: %u.\n",
+                 test_result);
+      else if (verbose)
+        printf ("PASSED: testInternalGet (testMhdPollByEpoll).\n");
+      errorCount += test_result;
+    }
+#else
+    /* Mute compiler warnings */
+    (void) testMultithreadedGet;
+    (void) testMultithreadedPoolGet;
+#endif /* _MHD_HEAVY_TESTS */
+  }
+#endif /* disabled runners, not suitable for this test */
+  if (0 != errorCount)
+    fprintf (stderr,
+             "Error (code: %u)\n",
+             errorCount);
+  else if (verbose)
+    printf ("All tests passed.\n");
+
+  test_global_cleanup ();
+
+  return (errorCount == 0) ? 0 : 1;       /* 0 == pass */
+}