Add support for Websockets with https inspection enabled
[privoxy.git] / jcc.c
diff --git a/jcc.c b/jcc.c
index 3129bab..dbc5e11 100644 (file)
--- a/jcc.c
+++ b/jcc.c
 
 #else /* ifndef _WIN32 */
 
-# if !defined (__OS2__)
 # include <unistd.h>
 # include <sys/wait.h>
-# endif /* ndef __OS2__ */
 # include <sys/time.h>
 # include <sys/stat.h>
 # include <sys/ioctl.h>
 #  include <OS.h>      /* declarations for threads and stuff. */
 # endif
 
-# if defined(__EMX__) || defined(__OS2__)
-#  include <sys/select.h>  /* OS/2/EMX needs a little help with select */
-# endif
-# ifdef __OS2__
-#define INCL_DOS
-# include <os2.h>
-# endif
-
 #ifdef HAVE_POLL
 #ifdef __GLIBC__
 #include <sys/poll.h>
@@ -143,10 +133,10 @@ int urls_rejected = 0;     /* total nr of urls rejected */
 int g_terminate = 0;
 #endif
 
-#if !defined(_WIN32) && !defined(__OS2__)
+#if !defined(_WIN32)
 static void sig_handler(int the_signal);
 #endif
-static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
+static int client_protocol_is_unsupported(struct client_state *csp, char *req);
 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
 static jb_err get_server_headers(struct client_state *csp);
 static const char *crunch_reason(const struct http_response *rsp);
@@ -156,6 +146,7 @@ static jb_err receive_client_request(struct client_state *csp);
 static jb_err parse_client_request(struct client_state *csp);
 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
 static jb_err change_request_destination(struct client_state *csp);
+static void handle_established_connection(struct client_state *csp);
 static void chat(struct client_state *csp);
 static void serve(struct client_state *csp);
 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
@@ -176,10 +167,6 @@ static int32 server_thread(void *data);
 #define sleep(N)  Sleep(((N) * 1000))
 #endif
 
-#ifdef __OS2__
-#define sleep(N)  DosSleep(((N) * 100))
-#endif
-
 #ifdef FUZZ
 int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
 void show_fuzz_usage(const char *name);
@@ -193,8 +180,10 @@ privoxy_mutex_t log_mutex;
 privoxy_mutex_t log_init_mutex;
 privoxy_mutex_t connection_reuse_mutex;
 
+#ifdef FEATURE_HTTPS_INSPECTION
 privoxy_mutex_t certificate_mutex;
-privoxy_mutex_t rng_mutex;
+privoxy_mutex_t ssl_init_mutex;
+#endif
 
 #ifdef FEATURE_EXTERNAL_FILTERS
 privoxy_mutex_t external_filter_mutex;
@@ -202,6 +191,10 @@ privoxy_mutex_t external_filter_mutex;
 #ifdef FEATURE_CLIENT_TAGS
 privoxy_mutex_t client_tags_mutex;
 #endif
+#ifdef FEATURE_EXTENDED_STATISTICS
+privoxy_mutex_t filter_statistics_mutex;
+privoxy_mutex_t block_statistics_mutex;
+#endif
 
 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
 privoxy_mutex_t resolver_mutex;
@@ -340,7 +333,7 @@ static const struct cruncher crunchers_light[] = {
  *
  * here?
  */
-#if !defined(_WIN32) && !defined(__OS2__)
+#if !defined(_WIN32)
 /*********************************************************************
  *
  * Function    :  sig_handler
@@ -443,7 +436,7 @@ static unsigned int get_write_delay(const struct client_state *csp)
  *                FALSE if the request doesn't look invalid.
  *
  *********************************************************************/
-static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
+static int client_protocol_is_unsupported(struct client_state *csp, char *req)
 {
    /*
     * If it's a FTP or gopher request, we don't support it.
@@ -479,8 +472,20 @@ static int client_protocol_is_unsupported(const struct client_state *csp, char *
       log_error(LOG_LEVEL_CLF,
          "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
       freez(req);
-      write_socket_delayed(csp->cfd, response, strlen(response),
-         get_write_delay(csp));
+
+#ifdef FEATURE_HTTPS_INSPECTION
+      if (client_use_ssl(csp))
+      {
+         ssl_send_data_delayed(&(csp->ssl_client_attr),
+            (const unsigned char *)response, strlen(response),
+            get_write_delay(csp));
+      }
+      else
+#endif
+      {
+         write_socket_delayed(csp->cfd, response, strlen(response),
+            get_write_delay(csp));
+      }
 
       return TRUE;
    }
@@ -573,10 +578,8 @@ static jb_err get_request_destination_elsewhere(struct client_state *csp, struct
    }
    else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
    {
-#ifndef FEATURE_EXTENDED_HOST_PATTERNS
       /* Split the domain we just got for pattern matching */
       init_domain_components(csp->http);
-#endif
 
       return JB_ERR_OK;
    }
@@ -835,23 +838,37 @@ static void send_crunch_response(struct client_state *csp, struct http_response
 
       /* Log that the request was crunched and why. */
       log_applied_actions(csp->action);
-      log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
-      log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
-         csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
-
+#ifdef FEATURE_HTTPS_INSPECTION
+      if (client_use_ssl(csp))
+      {
+         log_error(LOG_LEVEL_CRUNCH, "%s: https://%s%s", crunch_reason(rsp),
+            http->hostport, http->path);
+         log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" %s %lu",
+            csp->ip_addr_str, http->gpc, http->hostport, http->path,
+            http->version, status_code, rsp->content_length);
+      }
+      else
+#endif
+      {
+         log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
+         log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %lu",
+            csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
+      }
       /* Write the answer to the client */
 #ifdef FEATURE_HTTPS_INSPECTION
       if (client_use_ssl(csp))
       {
-         if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                 (const unsigned char *)rsp->head, rsp->head_length) < 0)
-          || (ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                 (const unsigned char *)rsp->body, rsp->content_length) < 0))
+         if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
+                (const unsigned char *)rsp->head, rsp->head_length,
+                get_write_delay(csp)) < 0)
+          || (ssl_send_data_delayed(&(csp->ssl_client_attr),
+                (const unsigned char *)rsp->body, rsp->content_length,
+                get_write_delay(csp)) < 0))
          {
             /* There is nothing we can do about it. */
             log_error(LOG_LEVEL_CONNECT, "Couldn't deliver the error message "
-               "for %s through client socket %d using TLS/SSL",
-               http->url, csp->cfd);
+               "for https://%s%s through client socket %d using TLS/SSL",
+               http->hostport, http->url, csp->cfd);
          }
       }
       else
@@ -972,10 +989,10 @@ static void build_request_line(struct client_state *csp, const struct forward_sp
     * if +downgrade action applies.
     */
    if ((csp->action->flags & ACTION_DOWNGRADE)
-     && (!strcmpic(http->ver, "HTTP/1.1")))
+     && (!strcmpic(http->version, "HTTP/1.1")))
    {
-      freez(http->ver);
-      http->ver = strdup_or_die("HTTP/1.0");
+      freez(http->version);
+      http->version = strdup_or_die("HTTP/1.0");
    }
 
    /*
@@ -994,7 +1011,7 @@ static void build_request_line(struct client_state *csp, const struct forward_sp
       string_append(request_line, http->path);
    }
    string_append(request_line, " ");
-   string_append(request_line, http->ver);
+   string_append(request_line, http->version);
 
    if (*request_line == NULL)
    {
@@ -1159,6 +1176,22 @@ void save_connection_destination(jb_socket sfd,
       server_connection->gateway_host = NULL;
    }
    server_connection->gateway_port = fwd->gateway_port;
+   if (NULL != fwd->auth_username)
+   {
+      server_connection->auth_username = strdup_or_die(fwd->auth_username);
+   }
+   else
+   {
+      server_connection->auth_username = NULL;
+   }
+   if (NULL != fwd->auth_password)
+   {
+      server_connection->auth_password = strdup_or_die(fwd->auth_password);
+   }
+   else
+   {
+      server_connection->auth_password = NULL;
+   }
 
    if (NULL != fwd->forward_host)
    {
@@ -1170,6 +1203,7 @@ void save_connection_destination(jb_socket sfd,
    }
    server_connection->forward_port = fwd->forward_port;
 }
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
 
 
 /*********************************************************************
@@ -1270,7 +1304,6 @@ static void verify_request_length(struct client_state *csp)
       log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
    }
 }
-#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
 
 
 /*********************************************************************
@@ -1531,7 +1564,7 @@ static jb_err receive_chunked_client_request_body(struct client_state *csp)
       return JB_ERR_PARSE;
    }
    log_error(LOG_LEVEL_CONNECT,
-      "Chunked client body completely read. Length: %d", body_length);
+      "Chunked client body completely read. Length: %lu", body_length);
    csp->expected_client_content_length = body_length;
 
    return JB_ERR_OK;
@@ -1594,7 +1627,7 @@ extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
    if (strcmp(fuzz_input_file, "-") != 0)
    {
       log_error(LOG_LEVEL_FATAL,
-         "Fuzzed client requests can currenty only be read from stdin (-).");
+         "Fuzzed client requests can currently only be read from stdin (-).");
    }
    err = receive_client_request(csp);
    if (err != JB_ERR_OK)
@@ -1885,12 +1918,13 @@ static jb_err parse_client_request(struct client_state *csp)
 
 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
    if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
-    && (!strcmpic(csp->http->ver, "HTTP/1.1"))
+    && (!strcmpic(csp->http->version, "HTTP/1.1"))
     && (csp->http->ssl == 0))
    {
       /* Assume persistence until further notice */
       csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
    }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
 
    if (csp->http->ssl == 0)
    {
@@ -1911,11 +1945,12 @@ static jb_err parse_client_request(struct client_state *csp)
       }
       verify_request_length(csp);
    }
+#ifndef FEATURE_HTTPS_INSPECTION
    else
    {
       csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
    }
-#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+#endif
 
    err = sed(csp, FILTER_CLIENT_HEADERS);
    if (JB_ERR_OK != err)
@@ -2024,14 +2059,26 @@ static int send_http_request(struct client_state *csp)
  * Returns     :  0 on success, anything else is an error.
  *
  *********************************************************************/
-static jb_err receive_and_send_encrypted_post_data(struct client_state *csp)
+static int receive_and_send_encrypted_post_data(struct client_state *csp)
 {
-   unsigned char buf[BUFFER_SIZE];
-   int len;
+   int content_length_known = csp->expected_client_content_length != 0;
 
-   while (is_ssl_pending(&(csp->mbedtls_client_attr.ssl)))
+   while (is_ssl_pending(&(csp->ssl_client_attr))
+      || (content_length_known && csp->expected_client_content_length != 0))
    {
-      len = ssl_recv_data(&(csp->mbedtls_client_attr.ssl), buf, sizeof(buf));
+      unsigned char buf[BUFFER_SIZE];
+      int len;
+      int max_bytes_to_read = sizeof(buf);
+
+      if (content_length_known && csp->expected_client_content_length < sizeof(buf))
+      {
+         max_bytes_to_read = (int)csp->expected_client_content_length;
+      }
+      log_error(LOG_LEVEL_CONNECT,
+         "Waiting for up to %d bytes of POST data from the client.",
+         max_bytes_to_read);
+      len = ssl_recv_data(&(csp->ssl_client_attr), buf,
+         (unsigned)max_bytes_to_read);
       if (len == -1)
       {
          return 1;
@@ -2041,9 +2088,9 @@ static jb_err receive_and_send_encrypted_post_data(struct client_state *csp)
          /* XXX: Does this actually happen? */
          break;
       }
-      log_error(LOG_LEVEL_HEADER, "Forwarding %d bytes of encrypted POST data",
+      log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted POST data",
          len);
-      len = ssl_send_data(&(csp->mbedtls_server_attr.ssl), buf, (size_t)len);
+      len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
       if (len == -1)
       {
          return 1;
@@ -2054,10 +2101,15 @@ static jb_err receive_and_send_encrypted_post_data(struct client_state *csp)
          {
             csp->expected_client_content_length -= (unsigned)len;
          }
+         if (csp->expected_client_content_length == 0)
+         {
+            log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
+            break;
+         }
       }
    }
 
-   log_error(LOG_LEVEL_HEADER, "Done forwarding encrypted POST data");
+   log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted POST data");
 
    return 0;
 
@@ -2095,7 +2147,7 @@ static int send_https_request(struct client_state *csp)
     * Write the client's (modified) header to the server
     * (along with anything else that may be in the buffer)
     */
-   ret = ssl_send_data(&(csp->mbedtls_server_attr.ssl),
+   ret = ssl_send_data(&(csp->ssl_server_attr),
       (const unsigned char *)hdr, strlen(hdr));
    freez(hdr);
 
@@ -2105,33 +2157,32 @@ static int send_https_request(struct client_state *csp)
          "Failed sending encrypted request headers to: %s: %E",
          csp->http->hostport);
       mark_server_socket_tainted(csp);
-      close_client_and_server_ssl_connections(csp);
       return 1;
    }
 
    if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
-      && ((flushed = ssl_flush_socket(&(csp->mbedtls_server_attr.ssl),
+      && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
             csp->client_iob)) < 0))
    {
       log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
          csp->http->hostport);
       return 1;
    }
-   if (flushed != 0)
+   if (flushed != 0 || csp->expected_client_content_length != 0)
    {
       if (csp->expected_client_content_length != 0)
       {
          if (csp->expected_client_content_length < flushed)
          {
             log_error(LOG_LEVEL_ERROR,
-               "Flushed %d bytes of request body while only expecting %llu",
+               "Flushed %ld bytes of request body while only expecting %llu",
                flushed, csp->expected_client_content_length);
             csp->expected_client_content_length = 0;
          }
          else
          {
             log_error(LOG_LEVEL_CONNECT,
-               "Flushed %d bytes of request body while expecting %llu",
+               "Flushed %ld bytes of request body while expecting %llu",
                flushed, csp->expected_client_content_length);
             csp->expected_client_content_length -= (unsigned)flushed;
             if (receive_and_send_encrypted_post_data(csp))
@@ -2143,7 +2194,7 @@ static int send_https_request(struct client_state *csp)
       else
       {
          log_error(LOG_LEVEL_CONNECT,
-            "Flushed %d bytes of request body", flushed);
+            "Flushed %ld bytes of request body", flushed);
       }
    }
 
@@ -2176,14 +2227,21 @@ static jb_err receive_encrypted_request(struct client_state *csp)
    do
    {
       log_error(LOG_LEVEL_HEADER, "Reading encrypted headers");
-      if (!data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout))
+      if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
+          !data_is_available(csp->cfd, csp->config->socket_timeout))
       {
          log_error(LOG_LEVEL_CONNECT,
             "Socket %d timed out while waiting for client headers", csp->cfd);
          return JB_ERR_PARSE;
       }
-      len = ssl_recv_data(&(csp->mbedtls_client_attr.ssl),
+      len = ssl_recv_data(&(csp->ssl_client_attr),
          (unsigned char *)buf, sizeof(buf));
+      if (len == 0)
+      {
+         log_error(LOG_LEVEL_CONNECT,
+            "Socket %d closed while waiting for client headers", csp->cfd);
+         return JB_ERR_PARSE;
+      }
       if (len == -1)
       {
          return JB_ERR_PARSE;
@@ -2223,12 +2281,31 @@ static jb_err process_encrypted_request(struct client_state *csp)
    struct list header_list;
    struct list *headers = &header_list;
 
+   assert(csp->ssl_with_client_is_opened);
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+   if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
+   {
+      csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
+   }
+#endif
    err = receive_encrypted_request(csp);
    if (err != JB_ERR_OK)
    {
+      if (csp->client_iob->cur == NULL ||
+          csp->client_iob->cur == csp->client_iob->eod)
+      {
+         /*
+          * We did not receive any data, most likely because the
+          * client is done. Don't log this as a parse failure.
+          */
+         return JB_ERR_PARSE;
+      }
       /* XXX: Also used for JB_ERR_MEMORY */
-      ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-         (const unsigned char *)CHEADER, strlen(CHEADER));
+      log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
+         jb_err_to_string(err));
+      ssl_send_data_delayed(&(csp->ssl_client_attr),
+         (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
       return err;
    }
 
@@ -2236,16 +2313,20 @@ static jb_err process_encrypted_request(struct client_state *csp)
    request_line = get_header(csp->client_iob);
    if (request_line == NULL)
    {
-      ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-         (const unsigned char *)CHEADER, strlen(CHEADER));
+      log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
+      ssl_send_data_delayed(&(csp->ssl_client_attr),
+         (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
       return JB_ERR_PARSE;
    }
    assert(*request_line != '\0');
 
    if (client_protocol_is_unsupported(csp, request_line))
    {
-      ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-         (const unsigned char *)CHEADER, strlen(CHEADER));
+      /*
+       * If the protocol is unsupported we're done here.
+       * client_protocol_is_unsupported() took care of sending
+       * the error response and logging the error message.
+       */
       return JB_ERR_PARSE;
    }
 
@@ -2266,8 +2347,8 @@ static jb_err process_encrypted_request(struct client_state *csp)
    freez(request_line);
    if (JB_ERR_OK != err)
    {
-      ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-         (const unsigned char *)CHEADER, strlen(CHEADER));
+      ssl_send_data_delayed(&(csp->ssl_client_attr),
+         (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
       /* XXX: Use correct size */
       log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
       log_error(LOG_LEVEL_ERROR,
@@ -2299,21 +2380,34 @@ static jb_err process_encrypted_request(struct client_state *csp)
        * Our attempts to get the request destination
        * elsewhere failed.
        */
-      ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-         (const unsigned char *)CHEADER, strlen(CHEADER));
+      log_error(LOG_LEVEL_ERROR,
+         "Failed to get the encrypted request destination");
+      ssl_send_data_delayed(&(csp->ssl_client_attr),
+         (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
       return JB_ERR_PARSE;
    }
 
-#ifndef FEATURE_EXTENDED_HOST_PATTERNS
    /* Split the domain we just got for pattern matching */
    init_domain_components(csp->http);
+
+#ifdef FEATURE_CLIENT_TAGS
+   /* XXX: If the headers were enlisted sooner, passing csp would do. */
+   if (csp->client_address == NULL)
+   {
+      set_client_address(csp, headers);
+      get_tag_list_for_client(csp->client_tags, csp->client_address);
+   }
 #endif
 
 #ifdef FEATURE_TOGGLE
    if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
 #endif
    {
-      /* Determine the actions for this URL */
+      /*
+       * Determine the actions for this request after
+       * clearing the ones from the previous one.
+       */
+      free_current_action(csp->action);
       get_url_actions(csp, csp->http);
    }
 
@@ -2337,8 +2431,8 @@ static jb_err process_encrypted_request(struct client_state *csp)
    err = sed_https(csp);
    if (JB_ERR_OK != err)
    {
-      ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-         (const unsigned char *)CHEADER, strlen(CHEADER));
+      ssl_send_data_delayed(&(csp->ssl_client_attr),
+         (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
       log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
          csp->ip_addr_str);
       log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
@@ -2348,10 +2442,133 @@ static jb_err process_encrypted_request(struct client_state *csp)
 
    log_error(LOG_LEVEL_HEADER, "Encrypted request processed");
    log_applied_actions(csp->action);
+   log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
+      csp->http->path);
 
    return err;
 
 }
+
+/*********************************************************************
+ *
+ * Function    :  cgi_page_requested
+ *
+ * Description :  Checks if a request is for an internal CGI page.
+ *
+ * Parameters  :
+ *          1  :  host = The host requested by the client.
+ *
+ * Returns     :  1 if a CGI page has been requested, 0 otherwise
+ *
+ *********************************************************************/
+static int cgi_page_requested(const char *host)
+{
+   if ((0 == strcmpic(host, CGI_SITE_1_HOST))
+    || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
+    || (0 == strcmpic(host, CGI_SITE_2_HOST))
+    || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
+   {
+      return 1;
+   }
+
+   return 0;
+
+}
+
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+/*********************************************************************
+ *
+ * Function    :  continue_https_chat
+ *
+ * Description :  Behaves similar to chat() but only deals with
+ *                https-inspected requests that arrive on an already
+ *                established connection. The first request is always
+ *                served by chat() which is a lot more complex as it
+ *                has to deal with forwarding settings and connection
+ *                failures etc.
+ *
+ *                If a connection to the server has already been
+ *                opened it is reused unless the request is blocked
+ *                or the forwarder changed.
+ *
+ *                If a connection to the server has not yet been
+ *                opened (because the previous request was crunched),
+ *                or the forwarder changed, the connection is dropped
+ *                so that the client retries on a fresh one.
+ *
+ * Parameters  :
+ *          1  :  csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns     :  Nothing.
+ *
+ *********************************************************************/
+static void continue_https_chat(struct client_state *csp)
+{
+   const struct forward_spec *fwd;
+
+   if (JB_ERR_OK != process_encrypted_request(csp))
+   {
+      return;
+   }
+
+   csp->requests_received_total++;
+
+   /*
+    * We have an encrypted request. Check if one of the crunchers wants it.
+    */
+   if (crunch_response_triggered(csp, crunchers_all))
+   {
+      /*
+       * Yes. The client got the crunch response and we're done here.
+       */
+      return;
+   }
+   if (csp->ssl_with_server_is_opened == 0)
+   {
+      log_error(LOG_LEVEL_CONNECT,
+         "Dropping the client connection on socket %d. "
+         "The server connection has not been established yet.",
+         csp->cfd);
+      csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
+      return;
+   }
+   assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
+
+   fwd = forward_url(csp, csp->http);
+   if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
+   {
+      log_error(LOG_LEVEL_CONNECT,
+         "Dropping the client connection on socket %d with "
+         "server socket %d connected to %s. The forwarder has changed.",
+         csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
+      csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
+      return;
+   }
+
+   log_error(LOG_LEVEL_CONNECT,
+      "Reusing server socket %d connected to %s. Requests already sent: %u.",
+      csp->server_connection.sfd, csp->server_connection.host,
+      csp->server_connection.requests_sent_total);
+
+   if (send_https_request(csp))
+   {
+      /*
+       * Most likely the server connection timed out. We can't easily
+       * create a new one so simply drop the client connection without a
+       * error response to let the client retry.
+       */
+      log_error(LOG_LEVEL_CONNECT,
+         "Dropping client connection on socket %d. "
+         "Forwarding the encrypted client request failed.",
+         csp->cfd);
+      return;
+   }
+   csp->server_connection.requests_sent_total++;
+   handle_established_connection(csp);
+   freez(csp->receive_buffer);
+}
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
 #endif
 
 
@@ -2392,13 +2609,6 @@ static void handle_established_connection(struct client_state *csp)
    int use_ssl_tunnel = 0;
    csp->dont_verify_certificate = 0;
 
-   /*
-    * Preset flags informing if SSL connections with server or client
-    * are opened or closed
-    */
-   csp->ssl_with_server_is_opened = 0;
-   csp->ssl_with_client_is_opened = 0;
-
    if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
    {
       /* Pass encrypted content without filtering. */
@@ -2444,15 +2654,7 @@ static void handle_established_connection(struct client_state *csp)
    for (;;)
    {
 #ifndef HAVE_POLL
-#ifdef __OS2__
-      /*
-       * FD_ZERO here seems to point to an errant macro which crashes.
-       * So do this by hand for now...
-       */
-      memset(&rfds,0x00,sizeof(fd_set));
-#else
       FD_ZERO(&rfds);
-#endif
 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
       if (!watch_client_socket)
       {
@@ -2491,14 +2693,14 @@ static void handle_established_connection(struct client_state *csp)
          {
             log_error(LOG_LEVEL_CONNECT,
                "Done reading from server. Content length: %llu as expected. "
-               "Bytes most recently read: %d.",
+               "Bytes most recently read: %ld.",
                byte_count, len);
          }
          else
          {
             log_error(LOG_LEVEL_CONNECT,
                "Done reading from server. Expected content length: %llu. "
-               "Actual content length: %llu. Bytes most recently read: %d.",
+               "Actual content length: %llu. Bytes most recently read: %ld.",
                csp->expected_content_length, byte_count, len);
          }
          len = 0;
@@ -2510,114 +2712,62 @@ static void handle_established_connection(struct client_state *csp)
       }
 #endif  /* FEATURE_CONNECTION_KEEP_ALIVE */
 
-#ifdef FEATURE_HTTPS_INSPECTION
-      /*
-       * Test if some data from client or destination server are pending
-       * on TLS/SSL. We must work with them preferably. TLS/SSL data can
-       * be pending because of maximal fragment size.
-       */
-      int read_ssl_server = 0;
-      int read_ssl_client = 0;
-
-      if (client_use_ssl(csp))
-      {
-         read_ssl_client = is_ssl_pending(&(csp->mbedtls_client_attr.ssl)) != 0;
-      }
-
-      if (server_use_ssl(csp))
+#ifdef HAVE_POLL
+      poll_fds[0].fd = csp->cfd;
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+      if (!watch_client_socket)
       {
-         read_ssl_server = is_ssl_pending(&(csp->mbedtls_server_attr.ssl)) != 0;
+         /*
+          * Ignore incoming data, but still watch out
+          * for disconnects etc. These flags are always
+          * implied anyway but explicitly setting them
+          * doesn't hurt.
+          */
+         poll_fds[0].events = POLLERR|POLLHUP;
       }
-
-      if (!read_ssl_server && !read_ssl_client)
+      else
 #endif
       {
-#ifdef HAVE_POLL
-         poll_fds[0].fd = csp->cfd;
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
-         if (!watch_client_socket)
-         {
-            /*
-             * Ignore incoming data, but still watch out
-             * for disconnects etc. These flags are always
-             * implied anyway but explicitly setting them
-             * doesn't hurt.
-             */
-            poll_fds[0].events = POLLERR|POLLHUP;
-         }
-         else
-#endif
-         {
-            poll_fds[0].events = POLLIN;
-         }
-         poll_fds[1].fd = csp->server_connection.sfd;
-         poll_fds[1].events = POLLIN;
-         n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
+         poll_fds[0].events = POLLIN;
+      }
+      poll_fds[1].fd = csp->server_connection.sfd;
+      poll_fds[1].events = POLLIN;
+      n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
 #else
-         timeout.tv_sec = csp->config->socket_timeout;
-         timeout.tv_usec = 0;
-         n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
+      timeout.tv_sec = csp->config->socket_timeout;
+      timeout.tv_usec = 0;
+      n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
 #endif /* def HAVE_POLL */
 
-         /*server or client not responding in timeout */
-         if (n == 0)
+      /*server or client not responding in timeout */
+      if (n == 0)
+      {
+         log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
+            csp->config->socket_timeout, http->url);
+         if ((byte_count == 0) && (http->ssl == 0))
          {
-            log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
-               csp->config->socket_timeout, http->url);
-            if ((byte_count == 0) && (http->ssl == 0))
-            {
-               send_crunch_response(csp, error_response(csp, "connection-timeout"));
-            }
-            mark_server_socket_tainted(csp);
-#ifdef FEATURE_HTTPS_INSPECTION
-            close_client_and_server_ssl_connections(csp);
-#endif
-            return;
+            send_crunch_response(csp, error_response(csp, "connection-timeout"));
          }
-         else if (n < 0)
-         {
-#ifdef HAVE_POLL
-            log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
-#else
-            log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
-#endif
-            mark_server_socket_tainted(csp);
+         mark_server_socket_tainted(csp);
 #ifdef FEATURE_HTTPS_INSPECTION
-            close_client_and_server_ssl_connections(csp);
+         close_client_and_server_ssl_connections(csp);
 #endif
-            return;
-         }
+         return;
       }
-#ifdef FEATURE_HTTPS_INSPECTION
-      else
+      else if (n < 0)
       {
-         /* set FD if some data are pending on TLS/SSL connections */
-#ifndef HAVE_POLL
-         FD_ZERO(&rfds);
-#endif
-         if (read_ssl_client)
-         {
 #ifdef HAVE_POLL
-            poll_fds[0].fd = csp->cfd;
-            poll_fds[0].events = POLLIN;
+         log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
 #else
-            FD_SET(csp->cfd, &rfds);
+         log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
 #endif
-            n++;
-         }
-
-         if (read_ssl_server)
-         {
-#ifdef HAVE_POLL
-            poll_fds[1].fd = csp->server_connection.sfd;
-            poll_fds[1].events = POLLIN;
-#else
-            FD_SET(csp->server_connection.sfd, &rfds);
+         mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+         close_client_and_server_ssl_connections(csp);
 #endif
-            n++;
-         }
+         return;
       }
-#endif
+
       /*
        * This is the body of the browser's request,
        * just read and write it.
@@ -2689,35 +2839,41 @@ static void handle_established_connection(struct client_state *csp)
 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
 
 #ifdef FEATURE_HTTPS_INSPECTION
-         /*
-          * Reading data from standard or secured connection (HTTP/HTTPS)
-          */
          if (client_use_ssl(csp))
          {
-            /*
-             * Receiving HTTP request from client over TLS/SSL and sending
-             * it to server over TLS/SSL.
-             */
-            len = ssl_recv_data(&(csp->mbedtls_client_attr.ssl),
-               (unsigned char *)csp->receive_buffer, (size_t)max_bytes_to_read);
-
-            if (len <= 0)
-            {
-               mark_server_socket_tainted(csp);
-               break;
-            }
-
-            ret = ssl_send_data(&(csp->mbedtls_server_attr.ssl),
-               (const unsigned char *)csp->receive_buffer, (size_t)len);
-
-            if (ret < 0)
+            if (csp->http->status == 101)
             {
-               log_error(LOG_LEVEL_ERROR,
-                  "Send request over TLS/SSL to: %s failed", http->host);
-               mark_server_socket_tainted(csp);
-               close_client_and_server_ssl_connections(csp);
-               return;
+               len = ssl_recv_data(&(csp->ssl_client_attr),
+                  (unsigned char *)csp->receive_buffer,
+                  (size_t)max_bytes_to_read);
+               if (len == -1)
+               {
+                  log_error(LOG_LEVEL_ERROR, "Failed to receive data "
+                     "on client socket %d for an upgraded connection",
+                     csp->cfd);
+                  break;
+               }
+               if (len == 0)
+               {
+                  log_error(LOG_LEVEL_CONNECT, "Done receiving data "
+                     "on client socket %d for an upgraded connection",
+                     csp->cfd);
+                  break;
+               }
+               byte_count += (unsigned long long)len;
+               len = ssl_send_data(&(csp->ssl_server_attr),
+                  (unsigned char *)csp->receive_buffer, (size_t)len);
+               if (len == -1)
+               {
+                  log_error(LOG_LEVEL_ERROR, "Failed to send data "
+                     "on server socket %d for an upgraded connection",
+                     csp->server_connection.sfd);
+                  break;
+               }
+               continue;
             }
+            log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
+            break;
          }
          else
 #endif /* def FEATURE_HTTPS_INSPECTION */
@@ -2738,7 +2894,7 @@ static void handle_established_connection(struct client_state *csp)
                csp->expected_client_content_length -= (unsigned)len;
                log_error(LOG_LEVEL_CONNECT,
                   "Expected client content length set to %llu "
-                  "after reading %d bytes.",
+                  "after reading %ld bytes.",
                   csp->expected_client_content_length, len);
                if (csp->expected_client_content_length == 0)
                {
@@ -2753,9 +2909,6 @@ static void handle_established_connection(struct client_state *csp)
             {
                log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
                mark_server_socket_tainted(csp);
-#ifdef FEATURE_HTTPS_INSPECTION
-               close_client_and_server_ssl_connections(csp);
-#endif
                return;
             }
          }
@@ -2804,7 +2957,7 @@ static void handle_established_connection(struct client_state *csp)
           */
          if (server_use_ssl(csp))
          {
-            len = ssl_recv_data(&(csp->mbedtls_server_attr.ssl),
+            len = ssl_recv_data(&(csp->ssl_server_attr),
                (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
          }
          else
@@ -2970,11 +3123,12 @@ static void handle_established_connection(struct client_state *csp)
                    */
                   if (client_use_ssl(csp))
                   {
-                     if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                            (const unsigned char *)hdr, strlen(hdr)) < 0)
-                        || (ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+                     if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
+                              (const unsigned char *)hdr, strlen(hdr),
+                              get_write_delay(csp)) < 0)
+                        || (ssl_send_data_delayed(&(csp->ssl_client_attr),
                               (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
-                              csp->content_length) < 0))
+                              csp->content_length, get_write_delay(csp)) < 0))
                      {
                         log_error(LOG_LEVEL_ERROR, "write modified content to "
                            "client over TLS/SSL failed");
@@ -2996,9 +3150,6 @@ static void handle_established_connection(struct client_state *csp)
                         freez(hdr);
                         freez(p);
                         mark_server_socket_tainted(csp);
-#ifdef FEATURE_HTTPS_INSPECTION
-                        close_client_and_server_ssl_connections(csp);
-#endif
                         return;
                      }
                   }
@@ -3075,12 +3226,13 @@ static void handle_established_connection(struct client_state *csp)
                    */
                   if (client_use_ssl(csp))
                   {
-                     if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                            (const unsigned char *)hdr, hdrlen) < 0)
-                        || ((flushed = ssl_flush_socket(&(csp->mbedtls_client_attr.ssl),
+                     if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
+                             (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
+                        || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
                                 csp->iob)) < 0)
-                        || (ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                              (const unsigned char *)csp->receive_buffer, (size_t)len) < 0))
+                        || (ssl_send_data_delayed(&(csp->ssl_client_attr),
+                              (const unsigned char *)csp->receive_buffer, (size_t)len,
+                              get_write_delay(csp)) < 0))
                      {
                         log_error(LOG_LEVEL_CONNECT,
                            "Flush header and buffers to client failed");
@@ -3102,9 +3254,6 @@ static void handle_established_connection(struct client_state *csp)
                            "Flush header and buffers to client failed: %E");
                         freez(hdr);
                         mark_server_socket_tainted(csp);
-#ifdef FEATURE_HTTPS_INSPECTION
-                        close_client_and_server_ssl_connections(csp);
-#endif
                         return;
                      }
                   }
@@ -3128,8 +3277,9 @@ static void handle_established_connection(struct client_state *csp)
                 */
                if (client_use_ssl(csp))
                {
-                  ret = ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                     (const unsigned char *)csp->receive_buffer, (size_t)len);
+                  ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
+                     (const unsigned char *)csp->receive_buffer, (size_t)len,
+                     get_write_delay(csp));
                   if (ret < 0)
                   {
                      log_error(LOG_LEVEL_ERROR,
@@ -3147,9 +3297,6 @@ static void handle_established_connection(struct client_state *csp)
                   {
                      log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
                      mark_server_socket_tainted(csp);
-#ifdef FEATURE_HTTPS_INSPECTION
-                     close_client_and_server_ssl_connections(csp);
-#endif
                      return;
                   }
                }
@@ -3196,9 +3343,9 @@ static void handle_established_connection(struct client_state *csp)
                    */
                   if (client_use_ssl(csp))
                   {
-                     ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+                     ssl_send_data_delayed(&(csp->ssl_client_attr),
                         (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
-                        strlen(INVALID_SERVER_HEADERS_RESPONSE));
+                        strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
                   }
                   else
 #endif /* def FEATURE_HTTPS_INSPECTION */
@@ -3221,7 +3368,7 @@ static void handle_established_connection(struct client_state *csp)
                    */
                   log_error(LOG_LEVEL_CONNECT,
                      "Continuing buffering server headers from socket %d. "
-                     "Bytes most recently read: %d.", csp->cfd, len);
+                     "Bytes most recently read: %ld.", csp->cfd, len);
                   continue;
                }
             }
@@ -3290,9 +3437,10 @@ static void handle_established_connection(struct client_state *csp)
                 */
                if (client_use_ssl(csp))
                {
-                  ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+                  ssl_send_data_delayed(&(csp->ssl_client_attr),
                      (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
-                     strlen(INVALID_SERVER_HEADERS_RESPONSE));
+                     strlen(INVALID_SERVER_HEADERS_RESPONSE),
+                     get_write_delay(csp));
                }
                else
 #endif /* def FEATURE_HTTPS_INSPECTION */
@@ -3322,9 +3470,10 @@ static void handle_established_connection(struct client_state *csp)
                 */
                if (client_use_ssl(csp))
                {
-                  ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+                  ssl_send_data_delayed(&(csp->ssl_client_attr),
                      (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
-                     strlen(INVALID_SERVER_HEADERS_RESPONSE));
+                     strlen(INVALID_SERVER_HEADERS_RESPONSE),
+                     get_write_delay(csp));
                }
                else
 #endif
@@ -3391,9 +3540,10 @@ static void handle_established_connection(struct client_state *csp)
 #ifdef FEATURE_HTTPS_INSPECTION
                if (client_use_ssl(csp))
                {
-                  if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
-                          (const unsigned char *)hdr, strlen(hdr)) < 0)
-                     || (len = ssl_flush_socket(&(csp->mbedtls_client_attr.ssl),
+                  if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
+                          (const unsigned char *)hdr, strlen(hdr),
+                          get_write_delay(csp)) < 0)
+                     || (len = ssl_flush_socket(&(csp->ssl_client_attr),
                             csp->iob) < 0))
                   {
                      log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
@@ -3424,9 +3574,6 @@ static void handle_established_connection(struct client_state *csp)
                       */
                      freez(hdr);
                      mark_server_socket_tainted(csp);
-#ifdef FEATURE_HTTPS_INSPECTION
-                     close_client_and_server_ssl_connections(csp);
-#endif
                      return;
                   }
                }
@@ -3455,9 +3602,10 @@ static void handle_established_connection(struct client_state *csp)
                 */
                if (client_use_ssl(csp))
                {
-                  ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+                  ssl_send_data_delayed(&(csp->ssl_client_attr),
                      (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
-                     strlen(INVALID_SERVER_HEADERS_RESPONSE));
+                     strlen(INVALID_SERVER_HEADERS_RESPONSE),
+                     get_write_delay(csp));
                }
                else
 #endif /* def FEATURE_HTTPS_INSPECTION */
@@ -3480,9 +3628,7 @@ static void handle_established_connection(struct client_state *csp)
 #endif
       return; /* huh? we should never get here */
    }
-#ifdef FEATURE_HTTPS_INSPECTION
-   close_client_and_server_ssl_connections(csp);
-#endif
+
    if (csp->content_length == 0)
    {
       /*
@@ -3503,9 +3649,19 @@ static void handle_established_connection(struct client_state *csp)
    }
 #endif
 
-   log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
-      csp->ip_addr_str, http->ocmd, csp->content_length);
-
+#ifdef FEATURE_HTTPS_INSPECTION
+   if (client_use_ssl(csp))
+   {
+      log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
+         csp->ip_addr_str, http->gpc, http->hostport, http->path,
+         http->version, csp->content_length);
+   }
+   else
+#endif
+   {
+      log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
+         csp->ip_addr_str, http->ocmd, csp->content_length);
+   }
    csp->server_connection.timestamp = time(NULL);
 }
 
@@ -3557,19 +3713,14 @@ static void chat(struct client_state *csp)
 
    /* decide how to route the HTTP request */
    fwd = forward_url(csp, http);
-   if (NULL == fwd)
-   {
-      log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!?  This can't happen!");
-      /* Never get here - LOG_LEVEL_FATAL causes program exit */
-      return;
-   }
 
 #ifdef FEATURE_HTTPS_INSPECTION
    /*
     * Setting flags to use old solution with SSL tunnel and to disable
-    * certificates verification.
+    * certificate verification.
     */
-   if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
+   if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
+      && !cgi_page_requested(csp->http->host))
    {
       use_ssl_tunnel = 1;
    }
@@ -3637,6 +3788,18 @@ static void chat(struct client_state *csp)
    }
 #endif
 
+#ifdef FEATURE_HTTPS_INSPECTION
+   /*
+    * Log the request unless we're https inspecting
+    * in which case we don't have the path yet and
+    * will log the request later.
+    */
+   if (!client_use_ssl(csp))
+#endif
+   {
+      log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
+   }
+
    if (http->ssl && connect_port_is_forbidden(csp))
    {
       const char *acceptable_connect_ports =
@@ -3676,8 +3839,6 @@ static void chat(struct client_state *csp)
    }
 
    log_applied_actions(csp->action);
-   log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
-
    if (fwd->forward_host)
    {
       log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
@@ -3705,7 +3866,11 @@ static void chat(struct client_state *csp)
       if (csp->server_connection.sfd != JB_INVALID_SOCKET)
       {
 #ifdef FEATURE_CONNECTION_SHARING
-         if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+         if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
+#ifdef FEATURE_HTTPS_INSPECTION
+            && !server_use_ssl(csp)
+#endif
+            )
          {
             remember_connection(&csp->server_connection);
          }
@@ -3726,37 +3891,29 @@ static void chat(struct client_state *csp)
       {
          int ret;
          /*
-          * Creating an SSL proxy. If forwarding is disabled, we must send
-          * CSUCCEED mesage to client. Then TLS/SSL connection with client
-          * is created.
+          * Creating a SSL proxy.
+          *
+          * By sending the CSUCCEED message we're lying to the client as
+          * the connection hasn't actually been established yet. We don't
+          * establish the connection until we have seen and parsed the
+          * encrypted client headers.
           */
-
-         if (fwd->forward_host == NULL)
+         if (write_socket_delayed(csp->cfd, CSUCCEED,
+               strlen(CSUCCEED), get_write_delay(csp)) != 0)
          {
-            /*
-             * We're lying to the client as the connection hasn't actually
-             * been established yet. We don't establish the connection until
-             * we have seen and parsed the encrypted client headers.
-             */
-            if (write_socket_delayed(csp->cfd, CSUCCEED,
-                  strlen(CSUCCEED), get_write_delay(csp)) != 0)
-            {
-               log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
-               return;
-            }
+            log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
+            return;
          }
 
          ret = create_client_ssl_connection(csp);
          if (ret != 0)
          {
             log_error(LOG_LEVEL_ERROR,
-               "Can't open secure connection with client");
-            close_client_ssl_connection(csp); /* XXX: Is this needed? */
+               "Failed to open a secure connection with the client");
             return;
          }
          if (JB_ERR_OK != process_encrypted_request(csp))
          {
-            log_error(LOG_LEVEL_ERROR, "Failed to parse encrypted request.");
             close_client_ssl_connection(csp);
             return;
          }
@@ -3770,7 +3927,6 @@ static void chat(struct client_state *csp)
             /*
              * Yes. The client got the crunch response and we're done here.
              */
-            close_client_ssl_connection(csp);
             return;
          }
       }
@@ -3814,6 +3970,9 @@ static void chat(struct client_state *csp)
           * client body in the buffer (if there is one) and to
           * continue parsing the bytes that follow.
           */
+#ifdef FEATURE_HTTPS_INSPECTION
+         close_client_ssl_connection(csp);
+#endif
          drain_and_close_socket(csp->cfd);
          csp->cfd = JB_INVALID_SOCKET;
 
@@ -3879,93 +4038,57 @@ static void chat(struct client_state *csp)
             }
 
             /*
-             * Test if connection with destination server was established
-             * successfully by parent proxy. Then we can send response to
-             * the client and continue or stop.
+             * Test if the connection to the destination server was
+             * established successfully by the parent proxy.
              */
             if (!tunnel_established_successfully(server_response, (unsigned int)len))
             {
-               log_error(LOG_LEVEL_ERROR, "Forwarder hasn't established "
-                  "connection with destination server.");
-
-               write_socket(csp->cfd, server_response, (size_t)len);
-               mark_server_socket_tainted(csp);
-               close_client_ssl_connection(csp);
-               return;
-            }
-
-            /*
-             * Parent proxy has established connection with destination server.
-             * Now we must create TLS/SSL connection with parent proxy.
-             */
-            ret = create_server_ssl_connection(csp);
-
-            /*
-            * If TLS/SSL connection wasn't created and invalid certificate
-            * wasn't detected, we can interrupt this function. Otherwise, we
-            * must inform the client about invalid server certificate.
-            */
-            if (ret != 0
-               && (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
-                  || csp->server_cert_verification_result == SSL_CERT_VALID))
-            {
+               log_error(LOG_LEVEL_ERROR,
+                  "The forwarder %s failed to establish a connection with %s",
+                  fwd->forward_host, http->host);
                rsp = error_response(csp, "connect-failed");
                if (rsp)
                {
                   send_crunch_response(csp, rsp);
                }
+               mark_server_socket_tainted(csp);
+               close_client_ssl_connection(csp);
                return;
             }
+         } /* -END- if (fwd->forward_host != NULL) */
 
-            /*
-             * TLS/SSL connection with parent proxy is established, we can
-             * inform client about success.
-             */
-            ret = write_socket(csp->cfd, server_response, (size_t)len);
-            if (ret != 0)
+         /*
+          * We can now create the TLS/SSL connection with the destination server.
+          */
+         int ret = create_server_ssl_connection(csp);
+         if (ret != 0)
+         {
+            if (csp->server_cert_verification_result != SSL_CERT_VALID &&
+                csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
             {
-               log_error(LOG_LEVEL_ERROR,
-                  "Sending parent proxy response to client failed");
-               mark_server_socket_tainted(csp);
-               close_client_ssl_connection(csp);
+               /*
+                * If the server certificate is invalid, we must inform
+                * the client and then close connection to the client.
+                */
+               ssl_send_certificate_error(csp);
+               close_client_and_server_ssl_connections(csp);
                return;
             }
-         }/* -END- if (fwd->forward_host != NULL) */
-         else
-         {
-            /*
-             * Parent proxy is not used, we can just create TLS/SSL connection
-             * with destination server
-             */
-            int ret = create_server_ssl_connection(csp);
-            if (ret != 0)
+            if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
+             || csp->server_cert_verification_result == SSL_CERT_VALID)
             {
-               if (csp->server_cert_verification_result != SSL_CERT_VALID &&
-                   csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
-               {
-                  /*
-                   * If the server certificate is invalid, we must inform
-                   * the client and then close connection to the client.
-                   */
-                  ssl_send_certificate_error(csp);
-                  close_client_and_server_ssl_connections(csp);
-                  return;
-               }
-               if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
-                || csp->server_cert_verification_result == SSL_CERT_VALID)
+               /*
+                * The TLS/SSL connection wasn't created but an invalid
+                * certificate wasn't detected. Report it as connection
+                * failure.
+                */
+               rsp = error_response(csp, "connect-failed");
+               if (rsp)
                {
-                  /*
-                   * The TLS/SSL connection wasn't created but an invalid
-                   * certificate wasn't detected. Report it as connection
-                   * failure.
-                   */
-                  rsp = error_response(csp, "connect-failed");
-                  if (rsp)
-                  {
-                     send_crunch_response(csp, rsp);
-                  }
-                  return;
+                  send_crunch_response(csp, rsp);
                }
+               close_client_and_server_ssl_connections(csp);
+               return;
             }
          }
       }/* -END- if (http->ssl) */
@@ -4027,10 +4150,12 @@ static void chat(struct client_state *csp)
       else
       {
          /*
-          * If server certificate is invalid, we must inform client and then
-          * close connection with client.
+          * If server certificate has been verified and is invalid,
+          * we must inform the client and then close the connection
+          * with client and server.
           */
-         if (csp->server_cert_verification_result != SSL_CERT_VALID)
+         if (csp->server_cert_verification_result != SSL_CERT_VALID &&
+             csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
          {
             ssl_send_certificate_error(csp);
             close_client_and_server_ssl_connections(csp);
@@ -4082,7 +4207,7 @@ extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
 
    if (strcmp(fuzz_input_file, "-") == 0)
    {
-      /* XXX: Doesn'T work yet. */
+      /* XXX: Doesn't work yet. */
       csp->server_connection.sfd = 0;
    }
    else
@@ -4147,6 +4272,9 @@ static void prepare_csp_for_next_request(struct client_state *csp)
    freez(csp->error_message);
    free_http_request(csp->http);
    destroy_list(csp->headers);
+#ifdef FEATURE_HTTPS_INSPECTION
+   destroy_list(csp->https_headers);
+#endif
    destroy_list(csp->tags);
 #ifdef FEATURE_CLIENT_TAGS
    destroy_list(csp->client_tags);
@@ -4175,7 +4303,7 @@ static void prepare_csp_for_next_request(struct client_state *csp)
       assert(bytes_to_shift > 0);
       assert(data_length > 0);
 
-      log_error(LOG_LEVEL_CONNECT, "Shifting %d pipelined bytes by %d bytes",
+      log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
          data_length, bytes_to_shift);
       memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
       csp->client_iob->cur = csp->client_iob->buf;
@@ -4231,7 +4359,16 @@ static void serve(struct client_state *csp)
    {
       unsigned int latency;
 
-      chat(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+      if (continue_chatting && client_use_ssl(csp))
+      {
+         continue_https_chat(csp);
+      }
+      else
+#endif
+      {
+         chat(csp);
+      }
 
       /*
        * If the request has been crunched,
@@ -4271,7 +4408,7 @@ static void serve(struct client_state *csp)
          {
             log_error(LOG_LEVEL_CONNECT,
                "Closing server socket %d connected to %s. "
-               "Keep-alive %u. Tainted: %u. Socket alive %u. Timeout: %u.",
+               "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
                csp->server_connection.sfd, csp->server_connection.host,
                0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
                0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
@@ -4283,6 +4420,9 @@ static void serve(struct client_state *csp)
                forget_connection(csp->server_connection.sfd);
             }
 #endif /* def FEATURE_CONNECTION_SHARING */
+#ifdef FEATURE_HTTPS_INSPECTION
+            close_server_ssl_connection(csp);
+#endif
             close_socket(csp->server_connection.sfd);
             mark_connection_closed(&csp->server_connection);
          }
@@ -4293,6 +4433,15 @@ static void serve(struct client_state *csp)
          continue_chatting = 0;
          config_file_change_detected = 1;
       }
+#ifdef FEATURE_HTTPS_INSPECTION
+      if (continue_chatting && client_use_ssl(csp) &&
+         csp->ssl_with_client_is_opened == 0)
+      {
+         continue_chatting = 0;
+         log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
+            "The TLS session has been terminated.", csp->cfd);
+      }
+#endif
 
       if (continue_chatting)
       {
@@ -4328,8 +4477,8 @@ static void serve(struct client_state *csp)
             && socket_is_still_alive(csp->cfd))
          {
             log_error(LOG_LEVEL_CONNECT,
-               "Client request %u arrived in time on socket %d.",
-               csp->requests_received_total+1, csp->cfd);
+               "Data arrived in time on client socket %d. Requests so far: %u",
+               csp->cfd, csp->requests_received_total);
             prepare_csp_for_next_request(csp);
          }
          else
@@ -4337,7 +4486,11 @@ static void serve(struct client_state *csp)
 #ifdef FEATURE_CONNECTION_SHARING
             if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
                && (csp->server_connection.sfd != JB_INVALID_SOCKET)
-               && (socket_is_still_alive(csp->server_connection.sfd)))
+               && (socket_is_still_alive(csp->server_connection.sfd))
+#ifdef FEATURE_HTTPS_INSPECTION
+               && !server_use_ssl(csp)
+#endif
+                )
             {
                time_t time_open = time(NULL) - csp->server_connection.timestamp;
 
@@ -4384,6 +4537,20 @@ static void serve(struct client_state *csp)
    chat(csp);
 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
 
+   if (csp->cfd != JB_INVALID_SOCKET)
+   {
+      log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
+         "Keep-alive: %u. Socket alive: %u. Data available: %u. "
+         "Configuration file change detected: %u. Requests received: %u.",
+         csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
+         socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
+         config_file_change_detected, csp->requests_received_total);
+#ifdef FEATURE_HTTPS_INSPECTION
+      close_client_ssl_connection(csp);
+#endif
+      drain_and_close_socket(csp->cfd);
+   }
+
    if (csp->server_connection.sfd != JB_INVALID_SOCKET)
    {
 #ifdef FEATURE_CONNECTION_SHARING
@@ -4392,6 +4559,11 @@ static void serve(struct client_state *csp)
          forget_connection(csp->server_connection.sfd);
       }
 #endif /* def FEATURE_CONNECTION_SHARING */
+
+#ifdef FEATURE_HTTPS_INSPECTION
+      close_server_ssl_connection(csp);
+#endif /* def FEATURE_HTTPS_INSPECTION */
+
       close_socket(csp->server_connection.sfd);
    }
 
@@ -4399,17 +4571,6 @@ static void serve(struct client_state *csp)
    mark_connection_closed(&csp->server_connection);
 #endif
 
-   if (csp->cfd != JB_INVALID_SOCKET)
-   {
-      log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
-         "Keep-alive: %u. Socket alive: %u. Data available: %u. "
-         "Configuration file change detected: %u. Requests received: %u.",
-         csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
-         socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
-         config_file_change_detected, csp->requests_received_total);
-      drain_and_close_socket(csp->cfd);
-   }
-
    free_csp_resources(csp);
 
    csp->flags &= ~CSP_FLAG_ACTIVE;
@@ -4586,8 +4747,10 @@ static void initialize_mutexes(void)
     * Prepare global mutex semaphores
     */
 
+#ifdef FEATURE_HTTPS_INSPECTION
    privoxy_mutex_init(&certificate_mutex);
-   privoxy_mutex_init(&rng_mutex);
+   privoxy_mutex_init(&ssl_init_mutex);
+#endif
 
    privoxy_mutex_init(&log_mutex);
    privoxy_mutex_init(&log_init_mutex);
@@ -4598,6 +4761,10 @@ static void initialize_mutexes(void)
 #ifdef FEATURE_CLIENT_TAGS
    privoxy_mutex_init(&client_tags_mutex);
 #endif
+#ifdef FEATURE_EXTENDED_STATISTICS
+   privoxy_mutex_init(&filter_statistics_mutex);
+   privoxy_mutex_init(&block_statistics_mutex);
+#endif
 
    /*
     * XXX: The assumptions below are a bit naive
@@ -4887,7 +5054,7 @@ int main(int argc, char **argv)
     * are handled when and where they occur without relying
     * on a signal.
     */
-#if !defined(_WIN32) && !defined(__OS2__)
+#if !defined(_WIN32)
 {
    int idx;
    const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
@@ -5349,7 +5516,7 @@ static void listen_loop(void)
    for (;;)
 #endif
    {
-#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(__OS2__)
+#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
       while (waitpid(-1, NULL, WNOHANG) > 0)
       {
          /* zombie children */
@@ -5379,7 +5546,7 @@ static void listen_loop(void)
       csp = &csp_list->csp;
 
       log_error(LOG_LEVEL_CONNECT,
-         "Waiting for the next client connection. Currently active threads: %d",
+         "Waiting for the next client connection. Currently active threads: %u",
          active_threads);
 
       /*
@@ -5478,10 +5645,11 @@ static void listen_loop(void)
 #define SELECTED_ONE_OPTION
          {
             pthread_t the_thread;
+            int ret;
 
-            errno = pthread_create(&the_thread, &attrs,
+            ret = pthread_create(&the_thread, &attrs,
                (void * (*)(void *))serve, csp);
-            child_id = errno ? -1 : 0;
+            child_id = ret ? -1 : 0;
          }
 #endif
 
@@ -5493,15 +5661,6 @@ static void listen_loop(void)
             csp);
 #endif
 
-#if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
-#define SELECTED_ONE_OPTION
-         child_id = _beginthread(
-            (void(* _Optlink)(void*))serve,
-            NULL,
-            64 * 1024,
-            csp);
-#endif
-
 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
 #define SELECTED_ONE_OPTION
          {
@@ -5604,7 +5763,7 @@ static void listen_loop(void)
              * XXX: If you assume ...
              */
             log_error(LOG_LEVEL_ERROR,
-               "Unable to take any additional connections: %E. Active threads: %d",
+               "Unable to take any additional connections: %E. Active threads: %u",
                active_threads);
             write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
                strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
@@ -5626,16 +5785,12 @@ static void listen_loop(void)
 
 #ifdef FEATURE_HTTPS_INSPECTION
    /* Clean up.  Aim: free all memory (no leaks) */
-   if (rng_seeded == 1)
-   {
-      mbedtls_ctr_drbg_free(&ctr_drbg);
-      mbedtls_entropy_free(&entropy);
-   }
+   ssl_release();
 #endif
 
 #ifdef FEATURE_GRACEFUL_TERMINATION
 
-   log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
+   log_error(LOG_LEVEL_INFO, "Graceful termination requested");
 
    unload_current_config_file();
    unload_current_actions_file();