-const char jcc_rcs[] = "$Id: jcc.c,v 1.69 2002/03/04 23:50:00 jongfoster Exp $";
+const char jcc_rcs[] = "$Id: jcc.c,v 1.255 2009/06/11 11:46:22 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
* Purpose : Main file. Contains main() method, main loop, and
* the main connection-handling function.
*
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * IJBSWA team. http://ijbswa.sourceforge.net
+ * Copyright : Written by and Copyright (C) 2001-2009 the SourceForge
+ * Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * Revisions :
- * $Log: jcc.c,v $
- * Revision 1.69 2002/03/04 23:50:00 jongfoster
- * Splitting off bind_port() call into bind_port_helper(), with
- * improved logging.
- *
- * Revision 1.68 2002/03/04 20:17:32 oes
- * Fixed usage info
- *
- * Revision 1.67 2002/03/04 18:18:57 oes
- * - Removed _DEBUG mode
- * - Cleand up cmdline parsing
- * - Introduced --no-daemon, --pidfile options
- * - Cleaned up signal handling:
- * - Terminate cleanly on INT, TERM and ABRT
- * - Schedule logfile for re-opening on HUP
- * - Ignore CHLD and PIPE
- * - Leave the rest with their default handlers
- * - Uniform handler registration
- * - Added usage() function
- * - Played styleguide police
- *
- * Revision 1.66 2002/03/03 15:06:55 oes
- * Re-enabled automatic config reloading
- *
- * Revision 1.65 2002/03/03 14:49:11 oes
- * Fixed CLF logging: Now uses client's original HTTP request
- *
- * Revision 1.64 2002/03/03 09:18:03 joergs
- * Made jumbjuster work on AmigaOS again.
- *
- * Revision 1.63 2002/03/02 04:14:50 david__schmidt
- * Clean up a little CRLF unpleasantness that suddenly appeared
- *
- * Revision 1.62 2002/02/20 23:17:23 jongfoster
- * Detecting some out-of memory conditions and exiting with a log message.
- *
- * Revision 1.61 2002/01/17 21:01:52 jongfoster
- * Moving all our URL and URL pattern parsing code to urlmatch.c.
- *
- * Revision 1.60 2001/12/30 14:07:32 steudten
- * - Add signal handling (unix)
- * - Add SIGHUP handler (unix)
- * - Add creation of pidfile (unix)
- * - Add action 'top' in rc file (RH)
- * - Add entry 'SIGNALS' to manpage
- * - Add exit message to logfile (unix)
- *
- * Revision 1.59 2001/12/13 14:07:18 oes
- * Fixed Bug: 503 error page now sent OK
- *
- * Revision 1.58 2001/11/30 23:37:24 jongfoster
- * Renaming the Win32 config file to config.txt - this is almost the
- * same as the corresponding UNIX name "config"
- *
- * Revision 1.57 2001/11/16 00:47:43 jongfoster
- * Changing the tty-disconnection code to use setsid().
- *
- * Revision 1.56 2001/11/13 20:20:54 jongfoster
- * Tabs->spaces, fixing a bug with missing {} around an if()
- *
- * Revision 1.55 2001/11/13 20:14:53 jongfoster
- * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
- *
- * Revision 1.54 2001/11/07 00:03:14 steudten
- * Give reliable return value if an error
- * occurs not just 0 with new daemon mode.
- *
- * Revision 1.53 2001/11/05 21:41:43 steudten
- * Add changes to be a real daemon just for unix os.
- * (change cwd to /, detach from controlling tty, set
- * process group and session leader to the own process.
- * Add DBG() Macro.
- * Add some fatal-error log message for failed malloc().
- * Add '-d' if compiled with 'configure --with-debug' to
- * enable debug output.
- *
- * Revision 1.52 2001/10/26 20:11:20 jongfoster
- * Fixing type mismatch
- *
- * Revision 1.51 2001/10/26 17:38:28 oes
- * Cosmetics
- *
- * Revision 1.50 2001/10/25 03:40:48 david__schmidt
- * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
- * threads to call select() simultaneously. So, it's time to do a real, live,
- * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
- * (native). Both versions will work, but using __OS2__ offers multi-threading.
- *
- * Revision 1.49 2001/10/23 21:41:35 jongfoster
- * Added call to initialize the (statically-allocated of course)
- * "out of memory" CGI response.
- *
- * Revision 1.48 2001/10/10 19:56:46 jongfoster
- * Moving some code that wasn't cookie-related out of an #ifdef
- * FEATURE_COOKIE_JAR
- *
- * Revision 1.47 2001/10/10 16:44:36 oes
- * Added CONNECT destination port limitation check
- *
- * Revision 1.46 2001/10/08 15:17:41 oes
- * Re-enabled SSL forwarding
- *
- * Revision 1.45 2001/10/07 15:42:11 oes
- * Replaced 6 boolean members of csp with one bitmap (csp->flags)
- *
- * Moved downgrading of the HTTP version from parse_http_request to
- * chat(), since we can't decide if it is necessary before we have
- * determined the actions for the URL. The HTTP command is now
- * *always* re-built so the repairs need no longer be special-cased.
- *
- * filter_popups now gets a csp pointer so it can raise the new
- * CSP_FLAG_MODIFIED flag.
- *
- * Bugfix
- *
- * Added configurable size limit for the IOB. If the IOB grows so
- * large that the next read would exceed the limit, the header
- * is generated, and the header & unfiltered buffer are flushed
- * to the client. Chat then continues in non-buffering,
- * non-filtering body mode.
- *
- * Revision 1.44 2001/10/02 18:13:57 oes
- * Ooops
- *
- * Revision 1.43 2001/10/02 15:32:13 oes
- * Moved generation of hdr
- *
- * Revision 1.42 2001/09/21 23:02:02 david__schmidt
- * Cleaning up 2 compiler warnings on OS/2.
- *
- * Revision 1.41 2001/09/16 17:05:14 jongfoster
- * Removing unused #include showarg.h
- *
- * Revision 1.40 2001/09/16 15:41:45 jongfoster
- * Fixing signed/unsigned comparison warning.
- *
- * Revision 1.39 2001/09/16 13:21:27 jongfoster
- * Changes to use new list functions.
- *
- * Revision 1.38 2001/09/16 13:01:46 jongfoster
- * Removing redundant function call that zeroed zalloc()'d memory.
- *
- * Revision 1.37 2001/09/10 11:12:24 oes
- * Deleted unused variable
- *
- * Revision 1.36 2001/09/10 10:56:15 oes
- * Silenced compiler warnings
- *
- * Revision 1.35 2001/07/31 14:44:22 oes
- * Deleted unused size parameter from filter_popups()
- *
- * Revision 1.34 2001/07/30 22:08:36 jongfoster
- * Tidying up #defines:
- * - All feature #defines are now of the form FEATURE_xxx
- * - Permanently turned off WIN_GUI_EDIT
- * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
- *
- * Revision 1.33 2001/07/29 19:32:00 jongfoster
- * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
- *
- * Revision 1.32 2001/07/29 18:47:05 jongfoster
- * Adding missing #include "loadcfg.h"
- *
- * Revision 1.31 2001/07/29 12:17:48 oes
- * Applied pthread fix by Paul Lieverse
- *
- * Revision 1.30 2001/07/25 22:57:13 jongfoster
- * __BEOS__ no longer overrides FEATURE_PTHREAD.
- * This is because FEATURE_PTHREAD will soon be widely used, so I
- * want to keep it simple.
- *
- * Revision 1.29 2001/07/24 12:47:06 oes
- * Applied BeOS support update by Eugenia
- *
- * Revision 1.28 2001/07/23 13:26:12 oes
- * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
- *
- * Revision 1.27 2001/07/19 19:09:47 haroon
- * - Added code to take care of the situation where while processing the first
- * server response (which includes the server header), after finding the end
- * of the headers we were not looking past the end of the headers for
- * content modification. I enabled it for filter_popups.
- * Someone else should look to see if other similar operations should be
- * done to the discarded portion of the buffer.
- *
- * Note 2001/07/20: No, the other content modification mechanisms will process
- * the whole iob later anyway. --oes
- *
- * Revision 1.26 2001/07/18 12:31:36 oes
- * cosmetics
- *
- * Revision 1.25 2001/07/15 19:43:49 jongfoster
- * Supports POSIX threads.
- * Also removed some unused #includes.
- *
- * Revision 1.24 2001/07/13 14:00:40 oes
- * - Generic content modification scheme:
- * Each feature has its own applicability flag that is set
- * from csp->action->flags.
- * Replaced the "filtering" int flag , by a function pointer
- * "content_filter" to the function that will do the content
- * modification. If it is != NULL, the document will be buffered
- * and processed through *content_filter, which must set
- * csp->content_length and return a modified copy of the body
- * or return NULL (on failiure).
- * - Changed csp->is_text to the more generic bitmap csp->content_type
- * which can currently take the valued CT_TEXT or CT_GIF
- * - Reformatting etc
- * - Removed all #ifdef PCRS
- *
- * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
- * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
- * the `block_acl' call. This prevents a compilation error when the user
- * does not wish to use the "ACL" feature.
- *
- * Revision 1.22 2001/06/29 21:45:41 oes
- * Indentation, CRLF->LF, Tab-> Space
- *
- * Revision 1.21 2001/06/29 13:29:36 oes
- * - Cleaned up, improved comments
- * - Unified all possible interceptors (CGI,
- * block, trust, fast_redirect) in one
- * place, with one (CGI) answer generation
- * mechansim. Much clearer now.
- * - Removed the GIF image generation, which
- * is now done in filters.c:block_url()
- * - Made error conditions like domain lookup
- * failiure or (various) problems while talking
- * to the server use cgi.c:error_response()
- * instead of generating HTML/HTTP in chat() (yuck!)
- * - Removed logentry from cancelled commit
- *
- * Revision 1.20 2001/06/09 10:55:28 jongfoster
- * Changing BUFSIZ ==> BUFFER_SIZE
- *
- * Revision 1.19 2001/06/07 23:12:52 jongfoster
- * Replacing function pointer in struct gateway with a directly
- * called function forwarded_connect().
- * Replacing struct gateway with struct forward_spec
- *
- * Revision 1.18 2001/06/03 19:12:16 oes
- * introduced new cgi handling
- *
- * Revision 1.17 2001/06/01 20:07:23 jongfoster
- * Now uses action +image-blocker{} rather than config->tinygif
- *
- * Revision 1.16 2001/06/01 18:49:17 jongfoster
- * Replaced "list_share" with "list" - the tiny memory gain was not
- * worth the extra complexity.
- *
- * Revision 1.15 2001/05/31 21:24:47 jongfoster
- * Changed "permission" to "action" throughout.
- * Removed DEFAULT_USER_AGENT - it must now be specified manually.
- * Moved vanilla wafer check into chat(), since we must now
- * decide whether or not to add it based on the URL.
- *
- * Revision 1.14 2001/05/29 20:14:01 joergs
- * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
- * increased.
- *
- * Revision 1.13 2001/05/29 09:50:24 jongfoster
- * Unified blocklist/imagelist/permissionslist.
- * File format is still under discussion, but the internal changes
- * are (mostly) done.
- *
- * Also modified interceptor behaviour:
- * - We now intercept all URLs beginning with one of the following
- * prefixes (and *only* these prefixes):
- * * http://i.j.b/
- * * http://ijbswa.sf.net/config/
- * * http://ijbswa.sourceforge.net/config/
- * - New interceptors "home page" - go to http://i.j.b/ to see it.
- * - Internal changes so that intercepted and fast redirect pages
- * are not replaced with an image.
- * - Interceptors now have the option to send a binary page direct
- * to the client. (i.e. ijb-send-banner uses this)
- * - Implemented show-url-info interceptor. (Which is why I needed
- * the above interceptors changes - a typical URL is
- * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
- * The previous mechanism would not have intercepted that, and
- * if it had been intercepted then it then it would have replaced
- * it with an image.)
- *
- * Revision 1.12 2001/05/27 22:17:04 oes
- *
- * - re_process_buffer no longer writes the modified buffer
- * to the client, which was very ugly. It now returns the
- * buffer, which it is then written by chat.
- *
- * - content_length now adjusts the Content-Length: header
- * for modified documents rather than crunch()ing it.
- * (Length info in csp->content_length, which is 0 for
- * unmodified documents)
- *
- * - For this to work, sed() is called twice when filtering.
- *
- * Revision 1.11 2001/05/26 17:27:53 jongfoster
- * Added support for CLF and fixed LOG_LEVEL_LOG.
- * Also did CRLF->LF fix of my previous patch.
- *
- * Revision 1.10 2001/05/26 15:26:15 jongfoster
- * ACL feature now provides more security by immediately dropping
- * connections from untrusted hosts.
- *
- * Revision 1.9 2001/05/26 00:28:36 jongfoster
- * Automatic reloading of config file.
- * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
- * Most of the global variables have been moved to a new
- * struct configuration_spec, accessed through csp->config->globalname
- * Most of the globals remaining are used by the Win32 GUI.
- *
- * Revision 1.8 2001/05/25 22:43:18 jongfoster
- * Fixing minor memory leak and buffer overflow.
- *
- * Revision 1.7 2001/05/25 22:34:30 jongfoster
- * Hard tabs->Spaces
- *
- * Revision 1.6 2001/05/23 00:13:58 joergs
- * AmigaOS support fixed.
- *
- * Revision 1.5 2001/05/22 18:46:04 oes
- *
- * - Enabled filtering banners by size rather than URL
- * by adding patterns that replace all standard banner
- * sizes with the "Junkbuster" gif to the re_filterfile
- *
- * - Enabled filtering WebBugs by providing a pattern
- * which kills all 1x1 images
- *
- * - Added support for PCRE_UNGREEDY behaviour to pcrs,
- * which is selected by the (nonstandard and therefore
- * capital) letter 'U' in the option string.
- * It causes the quantifiers to be ungreedy by default.
- * Appending a ? turns back to greedy (!).
- *
- * - Added a new interceptor ijb-send-banner, which
- * sends back the "Junkbuster" gif. Without imagelist or
- * MSIE detection support, or if tinygif = 1, or the
- * URL isn't recognized as an imageurl, a lame HTML
- * explanation is sent instead.
- *
- * - Added new feature, which permits blocking remote
- * script redirects and firing back a local redirect
- * to the browser.
- * The feature is conditionally compiled, i.e. it
- * can be disabled with --disable-fast-redirects,
- * plus it must be activated by a "fast-redirects"
- * line in the config file, has its own log level
- * and of course wants to be displayed by show-proxy-args
- * Note: Boy, all the #ifdefs in 1001 locations and
- * all the fumbling with configure.in and acconfig.h
- * were *way* more work than the feature itself :-(
- *
- * - Because a generic redirect template was needed for
- * this, tinygif = 3 now uses the same.
- *
- * - Moved GIFs, and other static HTTP response templates
- * to project.h
- *
- * - Some minor fixes
- *
- * - Removed some >400 CRs again (Jon, you really worked
- * a lot! ;-)
- *
- * Revision 1.4 2001/05/21 19:34:01 jongfoster
- * Made failure to bind() a fatal error.
- *
- * Revision 1.3 2001/05/20 01:21:20 jongfoster
- * Version 2.9.4 checkin.
- * - Merged popupfile and cookiefile, and added control over PCRS
- * filtering, in new "permissionsfile".
- * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
- * file error you now get a message box (in the Win32 GUI) rather
- * than the program exiting with no explanation.
- * - Made killpopup use the PCRS MIME-type checking and HTTP-header
- * skipping.
- * - Removed tabs from "config"
- * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
- * - Bumped up version number.
- *
- * Revision 1.2 2001/05/17 22:34:44 oes
- * - Added hint on GIF char array generation to jcc.c
- * - Cleaned CRLF's from the sources and related files
- * - Repaired logging for REF and FRC
- *
- * Revision 1.1.1.1 2001/05/15 13:58:56 oes
- * Initial import of version 2.9.3 source tree
- *
- *
*********************************************************************/
-\f
+
#include "config.h"
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
-
-#ifdef FEATURE_PTHREAD
-#include <pthread.h>
-#endif /* def FEATURE_PTHREAD */
+#include <assert.h>
#ifdef _WIN32
# ifndef FEATURE_PTHREAD
+# ifndef STRICT
+# define STRICT
+# endif
# include <windows.h>
# include <process.h>
# endif /* ndef FEATURE_PTHREAD */
# ifndef _WIN_CONSOLE
# include "w32log.h"
# endif /* ndef _WIN_CONSOLE */
+# include "w32svrapi.h"
#else /* ifndef _WIN32 */
#include <sys/termios.h>
#endif /* sun */
+#ifdef unix
+#include <pwd.h>
+#include <grp.h>
+#endif
+
# include <signal.h>
# ifdef __BEOS__
#include "filters.h"
#include "loaders.h"
#include "parsers.h"
-#include "killpopup.h"
#include "miscutil.h"
#include "errlog.h"
#include "jbsockets.h"
int urls_rejected = 0; /* total nr of urls rejected */
#endif /* def FEATURE_STATISTICS */
+#ifdef FEATURE_GRACEFUL_TERMINATION
+int g_terminate = 0;
+#endif
-static void listen_loop(void);
+#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+static void sig_handler(int the_signal);
+#endif
+static int client_protocol_is_unsupported(const 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);
+static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
+static char *get_request_line(struct client_state *csp);
+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 chat(struct client_state *csp);
+static void serve(struct client_state *csp);
+#if !defined(_WIN32) || defined(_WIN_CONSOLE)
+static void usage(const char *myname);
+#endif
+static void initialize_mutexes(void);
+static jb_socket bind_port_helper(struct configuration_spec *config);
+static void listen_loop(void);
+
#ifdef AMIGA
void serve(struct client_state *csp);
#else /* ifndef AMIGA */
#define sleep(N) DosSleep(((N) * 100))
#endif
+#ifdef MUTEX_LOCKS_AVAILABLE
+/*
+ * XXX: Does the locking stuff really belong in this file?
+ */
+privoxy_mutex_t log_mutex;
+privoxy_mutex_t log_init_mutex;
+privoxy_mutex_t connection_reuse_mutex;
+
+#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
+privoxy_mutex_t resolver_mutex;
+#endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
+
+#ifndef HAVE_GMTIME_R
+privoxy_mutex_t gmtime_mutex;
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_LOCALTIME_R
+privoxy_mutex_t localtime_mutex;
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_RANDOM
+privoxy_mutex_t rand_mutex;
+#endif /* ndef HAVE_RANDOM */
+
+#endif /* def MUTEX_LOCKS_AVAILABLE */
+
#if defined(unix)
-const char *basedir;
+const char *basedir = NULL;
const char *pidfile = NULL;
-int received_hup_signal = 0;
+static int received_hup_signal = 0;
#endif /* defined unix */
-/* The vanilla wafer. */
-static const char VANILLA_WAFER[] =
- "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
- "Do_not_send_me_any_copyrighted_information_other_than_the_"
- "document_that_I_am_requesting_or_any_of_its_necessary_components._"
- "In_particular_do_not_send_me_any_cookies_that_"
- "are_subject_to_a_claim_of_copyright_by_anybody._"
- "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
- "(copyright_or_otherwise)_applying_to_any_cookie._";
+/* HTTP snipplets. */
+static const char CSUCCEED[] =
+ "HTTP/1.0 200 Connection established\r\n"
+ "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
+
+static const char CHEADER[] =
+ "HTTP/1.0 400 Invalid header received from client\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Invalid header received from client.\r\n";
+
+static const char FTP_RESPONSE[] =
+ "HTTP/1.0 400 Invalid request received from client\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Invalid request. Privoxy doesn't support FTP.\r\n";
+
+static const char GOPHER_RESPONSE[] =
+ "HTTP/1.0 400 Invalid request received from client\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Invalid request. Privoxy doesn't support gopher.\r\n";
+
+/* XXX: should be a template */
+static const char MISSING_DESTINATION_RESPONSE[] =
+ "HTTP/1.0 400 Bad request received from client\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Bad request. Privoxy was unable to extract the destination.\r\n";
+
+/* XXX: should be a template */
+static const char INVALID_SERVER_HEADERS_RESPONSE[] =
+ "HTTP/1.0 502 Server or forwarder response invalid\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
+
+#if 0
+/* XXX: should be a template */
+static const char NULL_BYTE_RESPONSE[] =
+ "HTTP/1.0 400 Bad request received from client\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Bad request. Null byte(s) before end of request.\r\n";
+#endif
+
+/* XXX: should be a template */
+static const char MESSED_UP_REQUEST_RESPONSE[] =
+ "HTTP/1.0 400 Malformed request after rewriting\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Bad request. Messed up with header filters.\r\n";
+
+static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
+ "HTTP/1.0 503 Too many open connections\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Maximum number of open connections reached.\r\n";
+
+static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
+ "HTTP/1.0 504 Connection timeout\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "The connection timed out because the client request didn't arrive in time.\r\n";
+
+/* A function to crunch a response */
+typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
+
+/* Crunch function flags */
+#define CF_NO_FLAGS 0
+/* Cruncher applies to forced requests as well */
+#define CF_IGNORE_FORCE 1
+/* Crunched requests are counted for the block statistics */
+#define CF_COUNT_AS_REJECT 2
+
+/* A crunch function and its flags */
+struct cruncher
+{
+ const crunch_func_ptr cruncher;
+ const int flags;
+};
+
+static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
+
+/* Complete list of cruncher functions */
+static const struct cruncher crunchers_all[] = {
+ { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
+ { block_url, CF_COUNT_AS_REJECT },
+#ifdef FEATURE_TRUST
+ { trust_url, CF_COUNT_AS_REJECT },
+#endif /* def FEATURE_TRUST */
+ { redirect_url, CF_NO_FLAGS },
+ { dispatch_cgi, CF_IGNORE_FORCE},
+ { NULL, 0 }
+};
+
+/* Light version, used after tags are applied */
+static const struct cruncher crunchers_light[] = {
+ { block_url, CF_COUNT_AS_REJECT },
+ { redirect_url, CF_NO_FLAGS },
+ { NULL, 0 }
+};
+/*
+ * XXX: Don't we really mean
+ *
+ * #if defined(unix)
+ *
+ * here?
+ */
#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
/*********************************************************************
*
* Function : sig_handler
*
* Description : Signal handler for different signals.
- * Exit gracefully on ABRT, TERM and INT
+ * Exit gracefully on TERM and INT
* or set a flag that will cause the errlog
* to be reopened by the main thread on HUP.
*
* Parameters :
- * 1 : the_signal - the signal cause this function to call
+ * 1 : the_signal = the signal cause this function to call
*
* Returns : -
*
{
switch(the_signal)
{
- case SIGABRT:
case SIGTERM:
case SIGINT:
log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
#if defined(unix)
- unlink(pidfile);
+ if(pidfile)
+ {
+ unlink(pidfile);
+ }
#endif /* unix */
exit(the_signal);
break;
case SIGHUP:
+#if defined(unix)
received_hup_signal = 1;
+#endif
break;
default:
/*********************************************************************
*
- * Function : chat
+ * Function : client_protocol_is_unsupported
*
- * Description : Once a connection to the client has been accepted,
- * this function is called (via serve()) to handle the
- * main business of the communication. When this
- * function returns, the caller must close the client
- * socket handle.
+ * Description : Checks if the client used a known unsupported
+ * protocol and deals with it by sending an error
+ * response.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : req = the first request line send by the client
*
- * Returns : On success, the number of bytes written are returned (zero
- * indicates nothing was written). On error, -1 is returned,
- * and errno is set appropriately. If count is zero and the
- * file descriptor refers to a regular file, 0 will be
- * returned without causing any other effect. For a special
- * file, the results are not portable.
+ * Returns : TRUE if an error response has been generated, or
+ * FALSE if the request doesn't look invalid.
*
*********************************************************************/
-static void chat(struct client_state *csp)
+static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
{
-/*
- * This next lines are a little ugly, but they simplifies the if statements
- * below. Basically if TOGGLE, then we want the if to test if the
- * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
- * then we want the if to test for CSP_FLAG_FORCED , else we don't
- */
-#ifdef FEATURE_TOGGLE
-# define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
-#else /* ifndef FEATURE_TOGGLE */
-# define IS_TOGGLED_ON_AND
-#endif /* ndef FEATURE_TOGGLE */
-#ifdef FEATURE_FORCE_LOAD
-# define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
-#else /* ifndef FEATURE_FORCE_LOAD */
-# define IS_NOT_FORCED_AND
-#endif /* def FEATURE_FORCE_LOAD */
-
-#define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
-
- char buf[BUFFER_SIZE];
- char *hdr, *p, *req;
- fd_set rfds;
- int n, maxfd, server_body;
- int ms_iis5_hack = 0;
- int byte_count = 0;
- const struct forward_spec * fwd;
- struct http_request *http;
-#ifdef FEATURE_KILL_POPUPS
- int block_popups; /* bool, 1==will block popups */
- int block_popups_now = 0; /* bool, 1==currently blocking popups */
-#endif /* def FEATURE_KILL_POPUPS */
-
- int pcrs_filter; /* bool, 1==will filter through pcrs */
- int gif_deanimate; /* bool, 1==will deanimate gifs */
-
- /* Function that does the content filtering for the current request */
- char *(*content_filter)() = NULL;
-
- /* Skeleton for HTTP response, if we should intercept the request */
- struct http_response *rsp;
-
- http = csp->http;
-
/*
- * Read the client's request. Note that since we're not using select() we
- * could get blocked here if a client connected, then didn't say anything!
+ * If it's a FTP or gopher request, we don't support it.
+ *
+ * These checks are better than nothing, but they might
+ * not work in all configurations and some clients might
+ * have problems digesting the answer.
+ *
+ * They should, however, never cause more problems than
+ * Privoxy's old behaviour (returning the misleading HTML
+ * error message:
+ *
+ * "Could not resolve http://(ftp|gopher)://example.org").
*/
-
- while (FOREVER)
+ if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
{
- n = read_socket(csp->cfd, buf, sizeof(buf));
-
- if (n <= 0) break; /* error! */
-
- add_to_iob(csp, buf, n);
+ const char *response = NULL;
+ const char *protocol = NULL;
- req = get_header(csp);
-
- if (req == NULL)
+ if (!strncmpic(req, "GET ftp://", 10))
{
- break; /* no HTTP request! */
+ response = FTP_RESPONSE;
+ protocol = "FTP";
}
-
- if (*req == '\0')
+ else
{
- continue; /* more to come! */
+ response = GOPHER_RESPONSE;
+ protocol = "GOPHER";
}
+ log_error(LOG_LEVEL_ERROR,
+ "%s tried to use Privoxy as %s proxy: %s",
+ csp->ip_addr_str, protocol, req);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
+ freez(req);
+ write_socket(csp->cfd, response, strlen(response));
-#ifdef FEATURE_FORCE_LOAD
- /* If this request contains the FORCE_PREFIX,
- * better get rid of it now and set the force flag --oes
- */
+ return TRUE;
+ }
- if (strstr(req, FORCE_PREFIX))
- {
- strclean(req, FORCE_PREFIX);
- log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
- csp->flags |= CSP_FLAG_FORCED;
- }
+ return FALSE;
+}
-#endif /* def FEATURE_FORCE_LOAD */
- parse_http_request(req, http, csp);
- freez(req);
- break;
- }
+/*********************************************************************
+ *
+ * Function : get_request_destination_elsewhere
+ *
+ * Description : If the client's request was redirected into
+ * Privoxy without the client's knowledge,
+ * the request line lacks the destination host.
+ *
+ * This function tries to get it elsewhere,
+ * provided accept-intercepted-requests is enabled.
+ *
+ * "Elsewhere" currently only means "Host: header",
+ * but in the future we may ask the redirecting
+ * packet filter to look the destination up.
+ *
+ * If the destination stays unknown, an error
+ * response is send to the client and headers
+ * are freed so that chat() can return directly.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : headers = a header list
+ *
+ * Returns : JB_ERR_OK if the destination is now known, or
+ * JB_ERR_PARSE if it isn't.
+ *
+ *********************************************************************/
+static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
+{
+ char *req;
- if (http->cmd == NULL)
+ if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
{
- strcpy(buf, CHEADER);
- write_socket(csp->cfd, buf, strlen(buf));
+ log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
+ " Privoxy isn't configured to accept intercepted requests.",
+ csp->ip_addr_str, csp->http->cmd);
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->http->cmd);
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
+ write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ destroy_list(headers);
- return;
+ return JB_ERR_PARSE;
}
-
- /* decide how to route the HTTP request */
-
- if ((fwd = forward_url(http, csp)) == NULL)
+ else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
{
- log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
- /* Never get here - LOG_LEVEL_FATAL causes program exit */
- }
-
- /* build the http request to send to the server
- * we have to do one of the following:
- *
- * create = use the original HTTP request to create a new
- * HTTP request that has either the path component
- * without the http://domainspec (w/path) or the
- * full orininal URL (w/url)
- * Note that the path and/or the HTTP version may
- * have been altered by now.
- *
- * connect = Open a socket to the host:port of the server
- * and short-circuit server and client socket.
- *
- * pass = Pass the request unchanged if forwarding a CONNECT
- * request to a parent proxy. Note that we'll be sending
- * the CFAIL message ourselves if connecting to the parent
- * fails, but we won't send a CSUCCEED message if it works,
- * since that would result in a double message (ours and the
- * parent's). After sending the request to the parent, we simply
- * tunnel.
- *
- * here's the matrix:
- * SSL
- * 0 1
- * +--------+--------+
- * | | |
- * 0 | create | connect|
- * | w/path | |
- * Forwarding +--------+--------+
- * | | |
- * 1 | create | pass |
- * | w/url | |
- * +--------+--------+
- *
- */
+#ifndef FEATURE_EXTENDED_HOST_PATTERNS
+ /* Split the domain we just got for pattern matching */
+ init_domain_components(csp->http);
+#endif
- /*
- * Determine the actions for this URL
- */
-#ifdef FEATURE_TOGGLE
- if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
- {
- /* Most compatible set of actions (i.e. none) */
- init_current_action(csp->action);
+ return JB_ERR_OK;
}
else
-#endif /* ndef FEATURE_TOGGLE */
{
- url_actions(http, csp);
- }
+ /* We can't work without destination. Go spread the news.*/
+
+ req = list_to_text(headers);
+ chomp(req);
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->http->cmd);
+ log_error(LOG_LEVEL_ERROR,
+ "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
+ csp->ip_addr_str, csp->http->cmd, req);
+ freez(req);
+ write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
+ destroy_list(headers);
+ return JB_ERR_PARSE;
+ }
/*
- * Check if a CONNECT request is allowable:
- * In the absence of a +limit-connect action, allow only port 443.
- * If there is an action, allow whatever matches the specificaton.
+ * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
+ * to get the destination IP address, use it as host directly
+ * or do a reverse DNS lookup first.
*/
- if(http->ssl)
+}
+
+
+/*********************************************************************
+ *
+ * Function : get_server_headers
+ *
+ * Description : Parses server headers in iob and fills them
+ * into csp->headers so that they can later be
+ * handled by sed().
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK if everything went fine, or
+ * JB_ERR_PARSE if the headers were incomplete.
+ *
+ *********************************************************************/
+static jb_err get_server_headers(struct client_state *csp)
+{
+ int continue_hack_in_da_house = 0;
+ char * header;
+
+ while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
{
- if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
- || (csp->action->flags & ACTION_LIMIT_CONNECT
- && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
+ if (header == NULL)
{
- strcpy(buf, CFORBIDDEN);
- write_socket(csp->cfd, buf, strlen(buf));
-
- log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
+ /*
+ * continue hack in da house. Ignore the ending of
+ * this head and continue enlisting header lines.
+ * The reason is described below.
+ */
+ enlist(csp->headers, "");
+ continue_hack_in_da_house = 0;
+ continue;
+ }
+ else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
+ {
+ /*
+ * It's a bodyless continue response, don't
+ * stop header parsing after reaching its end.
+ *
+ * As a result Privoxy will concatenate the
+ * next response's head and parse and deliver
+ * the headers as if they belonged to one request.
+ *
+ * The client will separate them because of the
+ * empty line between them.
+ *
+ * XXX: What we're doing here is clearly against
+ * the intended purpose of the continue header,
+ * and under some conditions (HTTP/1.0 client request)
+ * it's a standard violation.
+ *
+ * Anyway, "sort of against the spec" is preferable
+ * to "always getting confused by Continue responses"
+ * (Privoxy's behaviour before this hack was added)
+ */
+ log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
+ continue_hack_in_da_house = 1;
+ }
+ else if (*header == '\0')
+ {
+ /*
+ * If the header is empty, but the Continue hack
+ * isn't active, we can assume that we reached the
+ * end of the buffer before we hit the end of the
+ * head.
+ *
+ * Inform the caller an let it decide how to handle it.
+ */
+ return JB_ERR_PARSE;
+ }
- return;
+ if (JB_ERR_MEMORY == enlist(csp->headers, header))
+ {
+ /*
+ * XXX: Should we quit the request and return a
+ * out of memory error page instead?
+ */
+ log_error(LOG_LEVEL_ERROR,
+ "Out of memory while enlisting server headers. %s lost.",
+ header);
}
+ freez(header);
}
+ return JB_ERR_OK;
+}
+
- /*
- * Downgrade http version from 1.1 to 1.0 if +downgrade
- * action applies
- */
- if ( (http->ssl == 0)
- && (!strcmpic(http->ver, "HTTP/1.1"))
- && (csp->action->flags & ACTION_DOWNGRADE))
- {
- freez(http->ver);
- http->ver = strdup("HTTP/1.0");
+/*********************************************************************
+ *
+ * Function : crunch_reason
+ *
+ * Description : Translates the crunch reason code into a string.
+ *
+ * Parameters :
+ * 1 : rsp = a http_response
+ *
+ * Returns : A string with the crunch reason or an error description.
+ *
+ *********************************************************************/
+static const char *crunch_reason(const struct http_response *rsp)
+{
+ char * reason = NULL;
- if (http->ver == NULL)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
- }
+ assert(rsp != NULL);
+ if (rsp == NULL)
+ {
+ return "Internal error while searching for crunch reason";
}
- /*
- * Save a copy of the original request for logging
+ switch (rsp->reason)
+ {
+ case RSP_REASON_UNSUPPORTED:
+ reason = "Unsupported HTTP feature";
+ break;
+ case RSP_REASON_BLOCKED:
+ reason = "Blocked";
+ break;
+ case RSP_REASON_UNTRUSTED:
+ reason = "Untrusted";
+ break;
+ case RSP_REASON_REDIRECTED:
+ reason = "Redirected";
+ break;
+ case RSP_REASON_CGI_CALL:
+ reason = "CGI Call";
+ break;
+ case RSP_REASON_NO_SUCH_DOMAIN:
+ reason = "DNS failure";
+ break;
+ case RSP_REASON_FORWARDING_FAILED:
+ reason = "Forwarding failed";
+ break;
+ case RSP_REASON_CONNECT_FAILED:
+ reason = "Connection failure";
+ break;
+ case RSP_REASON_OUT_OF_MEMORY:
+ reason = "Out of memory (may mask other reasons)";
+ break;
+ case RSP_REASON_CONNECTION_TIMEOUT:
+ reason = "Connection timeout";
+ break;
+ default:
+ reason = "No reason recorded";
+ break;
+ }
+
+ return reason;
+}
+
+
+/*********************************************************************
+ *
+ * Function : send_crunch_response
+ *
+ * Description : Delivers already prepared response for
+ * intercepted requests, logs the interception
+ * and frees the response.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : rsp = Fully prepared response. Will be freed on exit.
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
+{
+ const struct http_request *http = csp->http;
+ char status_code[4];
+
+ assert(rsp != NULL);
+ assert(rsp->head != NULL);
+
+ if (rsp == NULL)
+ {
+ /*
+ * Not supposed to happen. If it does
+ * anyway, treat it as an unknown error.
+ */
+ cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
+ /* return code doesn't matter */
+ }
+
+ if (rsp == NULL)
+ {
+ /* If rsp is still NULL, we have serious internal problems. */
+ log_error(LOG_LEVEL_FATAL,
+ "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
+ }
+
+ /*
+ * Extract the status code from the actual head
+ * that was send to the client. It is the only
+ * way to get it right for all requests, including
+ * the fixed ones for out-of-memory problems.
+ *
+ * A head starts like this: 'HTTP/1.1 200...'
+ * 0123456789|11
+ * 10
+ */
+ status_code[0] = rsp->head[9];
+ status_code[1] = rsp->head[10];
+ status_code[2] = rsp->head[11];
+ status_code[3] = '\0';
+
+ /* Write the answer to the client */
+ if (write_socket(csp->cfd, rsp->head, rsp->head_length)
+ || write_socket(csp->cfd, rsp->body, rsp->content_length))
+ {
+ /* There is nothing we can do about it. */
+ log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
+ }
+
+ /* Log that the request was crunched and why. */
+ 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);
+
+ /* Clean up and return */
+ if (cgi_error_memory() != rsp)
+ {
+ free_http_response(rsp);
+ }
+ return;
+}
+
+
+#if 0
+/*********************************************************************
+ *
+ * Function : request_contains_null_bytes
+ *
+ * Description : Checks for NULL bytes in the request and sends
+ * an error message to the client if any were found.
+ *
+ * XXX: currently not used, see comment in chat().
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : buf = Data from the client's request to check.
+ * 3 : len = The data length.
+ *
+ * Returns : TRUE if the request contained one or more NULL bytes, or
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
+{
+ size_t c_len; /* Request lenght when treated as C string */
+
+ c_len = strlen(buf);
+
+ if (c_len < len)
+ {
+ /*
+ * Null byte(s) found. Log the request,
+ * return an error response and hang up.
+ */
+ size_t tmp_len = c_len;
+
+ do
+ {
+ /*
+ * Replace NULL byte(s) with '°' characters
+ * so the request can be logged as string.
+ * XXX: Is there a better replacement character?
+ */
+ buf[tmp_len]='°';
+ tmp_len += strlen(buf+tmp_len);
+ } while (tmp_len < len);
+
+ log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
+ "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
+ log_error(LOG_LEVEL_HEADER,
+ "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
+
+ write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
+
+ /* XXX: Log correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+#endif
+
+
+/*********************************************************************
+ *
+ * Function : crunch_response_triggered
+ *
+ * Description : Checks if the request has to be crunched,
+ * and delivers the crunch response if necessary.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : crunchers = list of cruncher functions to run
+ *
+ * Returns : TRUE if the request was answered with a crunch response
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
+{
+ struct http_response *rsp = NULL;
+ const struct cruncher *c;
+
+ /*
+ * If CGI request crunching is disabled,
+ * check the CGI dispatcher out of order to
+ * prevent unintentional blocks or redirects.
+ */
+ if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
+ && (NULL != (rsp = dispatch_cgi(csp))))
+ {
+ /* Deliver, log and free the interception response. */
+ send_crunch_response(csp, rsp);
+ return TRUE;
+ }
+
+ for (c = crunchers; c->cruncher != NULL; c++)
+ {
+ /*
+ * Check the cruncher if either Privoxy is toggled
+ * on and the request isn't forced, or if the cruncher
+ * applies to forced requests as well.
+ */
+ if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
+ !(csp->flags & CSP_FLAG_FORCED)) ||
+ (c->flags & CF_IGNORE_FORCE))
+ {
+ rsp = c->cruncher(csp);
+ if (NULL != rsp)
+ {
+ /* Deliver, log and free the interception response. */
+ send_crunch_response(csp, rsp);
+#ifdef FEATURE_STATISTICS
+ if (c->flags & CF_COUNT_AS_REJECT)
+ {
+ csp->flags |= CSP_FLAG_REJECTED;
+ }
+#endif /* def FEATURE_STATISTICS */
+
+ return TRUE;
+ }
+ }
+ }
+
+ return FALSE;
+}
+
+
+/*********************************************************************
+ *
+ * Function : build_request_line
+ *
+ * Description : Builds the HTTP request line.
+ *
+ * If a HTTP forwarder is used it expects the whole URL,
+ * web servers only get the path.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : fwd = The forwarding spec used for the request
+ * XXX: Should use http->fwd instead.
+ * 3 : request_line = The old request line which will be replaced.
+ *
+ * Returns : Nothing. Terminates in case of memory problems.
+ *
+ *********************************************************************/
+static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
+{
+ struct http_request *http = csp->http;
+
+ assert(http->ssl == 0);
+
+ /*
+ * Downgrade http version from 1.1 to 1.0
+ * if +downgrade action applies.
+ */
+ if ( (csp->action->flags & ACTION_DOWNGRADE)
+ && (!strcmpic(http->ver, "HTTP/1.1")))
+ {
+ freez(http->ver);
+ http->ver = strdup("HTTP/1.0");
+
+ if (http->ver == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
+ }
+ }
+
+ /*
+ * Rebuild the request line.
+ */
+ freez(*request_line);
+ *request_line = strdup(http->gpc);
+ string_append(request_line, " ");
+
+ if (fwd->forward_host)
+ {
+ string_append(request_line, http->url);
+ }
+ else
+ {
+ string_append(request_line, http->path);
+ }
+ string_append(request_line, " ");
+ string_append(request_line, http->ver);
+
+ if (*request_line == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
+ }
+ log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
+}
+
+
+/*********************************************************************
+ *
+ * Function : change_request_destination
+ *
+ * Description : Parse a (rewritten) request line and regenerate
+ * the http request data.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Forwards the parse_http_request() return code.
+ * Terminates in case of memory problems.
+ *
+ *********************************************************************/
+static jb_err change_request_destination(struct client_state *csp)
+{
+ struct http_request *http = csp->http;
+ jb_err err;
+
+ log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
+ free_http_request(http);
+ err = parse_http_request(csp->headers->first->str, http);
+ if (JB_ERR_OK != err)
+ {
+ log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
+ jb_err_to_string(err));
+ }
+ else
+ {
+ /* XXX: ocmd is a misleading name */
+ http->ocmd = strdup(http->cmd);
+ if (http->ocmd == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Out of memory copying rewritten HTTP request line");
+ }
+ }
+
+ return err;
+}
+
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+/*********************************************************************
+ *
+ * Function : server_response_is_complete
+ *
+ * Description : Determines whether we should stop reading
+ * from the server socket.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : content_length = Length of content received so far.
+ *
+ * Returns : TRUE if the response is complete,
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int server_response_is_complete(struct client_state *csp,
+ unsigned long long content_length)
+{
+ int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
+
+ if (!strcmpic(csp->http->gpc, "HEAD"))
+ {
+ /*
+ * "HEAD" implies no body, we are thus expecting
+ * no content. XXX: incomplete "list" of methods?
+ */
+ csp->expected_content_length = 0;
+ content_length_known = TRUE;
+ }
+
+ if (csp->http->status == 304)
+ {
+ /*
+ * Expect no body. XXX: incomplete "list" of status codes?
+ */
+ csp->expected_content_length = 0;
+ content_length_known = TRUE;
+ }
+
+ return (content_length_known && ((0 == csp->expected_content_length)
+ || (csp->expected_content_length <= content_length)));
+}
+
+
+/*********************************************************************
+ *
+ * Function : wait_for_alive_connections
+ *
+ * Description : Waits for alive connections to timeout.
+ *
+ * Parameters : N/A
+ *
+ * Returns : N/A
+ *
+ *********************************************************************/
+static void wait_for_alive_connections(void)
+{
+ int connections_alive = close_unusable_connections();
+
+ while (0 < connections_alive)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for %d connections to timeout.",
+ connections_alive);
+ sleep(60);
+ connections_alive = close_unusable_connections();
+ }
+
+ log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : save_connection_destination
+ *
+ * Description : Remembers a connection for reuse later on.
+ *
+ * Parameters :
+ * 1 : sfd = Open socket to remember.
+ * 2 : http = The destination for the connection.
+ * 3 : fwd = The forwarder settings used.
+ * 3 : server_connection = storage.
+ *
+ * Returns : void
+ *
+ *********************************************************************/
+void save_connection_destination(jb_socket sfd,
+ const struct http_request *http,
+ const struct forward_spec *fwd,
+ struct reusable_connection *server_connection)
+{
+ assert(sfd != JB_INVALID_SOCKET);
+ assert(NULL != http->host);
+ server_connection->host = strdup(http->host);
+ if (NULL == server_connection->host)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory saving socket.");
+ }
+ server_connection->port = http->port;
+
+ assert(NULL != fwd);
+ assert(server_connection->gateway_host == NULL);
+ assert(server_connection->gateway_port == 0);
+ assert(server_connection->forwarder_type == 0);
+ assert(server_connection->forward_host == NULL);
+ assert(server_connection->forward_port == 0);
+
+ server_connection->forwarder_type = fwd->type;
+ if (NULL != fwd->gateway_host)
+ {
+ server_connection->gateway_host = strdup(fwd->gateway_host);
+ if (NULL == server_connection->gateway_host)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory saving gateway_host.");
+ }
+ }
+ else
+ {
+ server_connection->gateway_host = NULL;
+ }
+ server_connection->gateway_port = fwd->gateway_port;
+
+ if (NULL != fwd->forward_host)
+ {
+ server_connection->forward_host = strdup(fwd->forward_host);
+ if (NULL == server_connection->forward_host)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory saving forward_host.");
+ }
+ }
+ else
+ {
+ server_connection->forward_host = NULL;
+ }
+ server_connection->forward_port = fwd->forward_port;
+}
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+
+/*********************************************************************
+ *
+ * Function : mark_server_socket_tainted
+ *
+ * Description : Makes sure we don't reuse a server socket
+ * (if we didn't read everything the server sent
+ * us reusing the socket would lead to garbage).
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : void.
+ *
+ *********************************************************************/
+static void mark_server_socket_tainted(struct client_state *csp)
+{
+ if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
+ {
+ log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
+ csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
+ }
+}
+
+/*********************************************************************
+ *
+ * Function : get_request_line
+ *
+ * Description : Read the client request line.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Pointer to request line or NULL in case of errors.
+ *
+ *********************************************************************/
+static char *get_request_line(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *request_line = NULL;
+ int len;
+
+ memset(buf, 0, sizeof(buf));
+
+ do
+ {
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Stopped waiting for the request line.");
+ write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
+ strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
+ return NULL;
+ }
+
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+
+ if (len <= 0) return NULL;
+
+ /*
+ * If there is no memory left for buffering the
+ * request, there is nothing we can do but hang up
+ */
+ if (add_to_iob(csp, buf, len))
+ {
+ return NULL;
+ }
+
+ request_line = get_header(csp->iob);
+
+ } while ((NULL != request_line) && ('\0' == *request_line));
+
+ return request_line;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : receive_client_request
+ *
+ * Description : Read the client's request (more precisely the
+ * client headers) and answer it if necessary.
+ *
+ * Note that since we're not using select() we could get
+ * blocked here if a client connected, then didn't say
+ * anything!
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
+ *
+ *********************************************************************/
+static jb_err receive_client_request(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *p;
+ char *req = NULL;
+ struct http_request *http;
+ int len;
+ jb_err err;
+
+ /* Temporary copy of the client's headers before they get enlisted in csp->headers */
+ struct list header_list;
+ struct list *headers = &header_list;
+
+ http = csp->http;
+
+ memset(buf, 0, sizeof(buf));
+
+ req = get_request_line(csp);
+ if (req == NULL)
+ {
+ return JB_ERR_PARSE;
+ }
+ assert(*req != '\0');
+
+ if (client_protocol_is_unsupported(csp, req))
+ {
+ return JB_ERR_PARSE;
+ }
+
+#ifdef FEATURE_FORCE_LOAD
+ /*
+ * If this request contains the FORCE_PREFIX and blocks
+ * aren't enforced, get rid of it and set the force flag.
+ */
+ if (strstr(req, FORCE_PREFIX))
+ {
+ if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
+ {
+ log_error(LOG_LEVEL_FORCE,
+ "Ignored force prefix in request: \"%s\".", req);
+ }
+ else
+ {
+ strclean(req, FORCE_PREFIX);
+ log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
+ csp->flags |= CSP_FLAG_FORCED;
+ }
+ }
+#endif /* def FEATURE_FORCE_LOAD */
+
+ err = parse_http_request(req, http);
+ freez(req);
+ if (JB_ERR_OK != err)
+ {
+ write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
+ log_error(LOG_LEVEL_ERROR,
+ "Couldn't parse request line received from %s: %s",
+ csp->ip_addr_str, jb_err_to_string(err));
+
+ free_http_request(http);
+ return JB_ERR_PARSE;
+ }
+
+ /* grab the rest of the client's headers */
+ init_list(headers);
+ for (;;)
+ {
+ p = get_header(csp->iob);
+
+ if (p == NULL)
+ {
+ /* There are no additional headers to read. */
+ break;
+ }
+
+ if (*p == '\0')
+ {
+ /*
+ * We didn't receive a complete header
+ * line yet, get the rest of it.
+ */
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Stopped grabbing the client headers.");
+ destroy_list(headers);
+ return JB_ERR_PARSE;
+ }
+
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+ if (len <= 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
+ destroy_list(headers);
+ return JB_ERR_PARSE;
+ }
+
+ if (add_to_iob(csp, buf, len))
+ {
+ /*
+ * If there is no memory left for buffering the
+ * request, there is nothing we can do but hang up
+ */
+ destroy_list(headers);
+ return JB_ERR_MEMORY;
+ }
+ }
+ else
+ {
+ /*
+ * We were able to read a complete
+ * header and can finaly enlist it.
+ */
+ enlist(headers, p);
+ freez(p);
+ }
+ }
+
+ if (http->host == NULL)
+ {
+ /*
+ * If we still don't know the request destination,
+ * the request is invalid or the client uses
+ * Privoxy without its knowledge.
+ */
+ if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
+ {
+ /*
+ * Our attempts to get the request destination
+ * elsewhere failed or Privoxy is configured
+ * to only accept proxy requests.
+ *
+ * An error response has already been send
+ * and we're done here.
+ */
+ return JB_ERR_PARSE;
+ }
+ }
+
+ /*
+ * Determine the actions for this URL
+ */
+#ifdef FEATURE_TOGGLE
+ if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
+ {
+ /* Most compatible set of actions (i.e. none) */
+ init_current_action(csp->action);
+ }
+ else
+#endif /* ndef FEATURE_TOGGLE */
+ {
+ get_url_actions(csp, http);
+ }
+
+ /*
+ * Save a copy of the original request for logging
+ */
+ http->ocmd = strdup(http->cmd);
+ if (http->ocmd == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Out of memory copying HTTP request line");
+ }
+ enlist(csp->headers, http->cmd);
+
+ /* Append the previously read headers */
+ list_append_list_unique(csp->headers, headers);
+ destroy_list(headers);
+
+ return JB_ERR_OK;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : parse_client_request
+ *
+ * Description : Parses the client's request and decides what to do
+ * with it.
+ *
+ * Note that since we're not using select() we could get
+ * blocked here if a client connected, then didn't say
+ * anything!
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK or JB_ERR_PARSE
+ *
+ *********************************************************************/
+static jb_err parse_client_request(struct client_state *csp)
+{
+ struct http_request *http = csp->http;
+ jb_err err;
+
+ err = sed(csp, FILTER_CLIENT_HEADERS);
+ if (JB_ERR_OK != err)
+ {
+ /* XXX: Should be handled in sed(). */
+ assert(err == JB_ERR_PARSE);
+ log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
+ }
+ csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
+
+ /* Check request line for rewrites. */
+ if ((NULL == csp->headers->first->str)
+ || (strcmp(http->cmd, csp->headers->first->str) &&
+ (JB_ERR_OK != change_request_destination(csp))))
+ {
+ /*
+ * A header filter broke the request line - bail out.
+ */
+ write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
+ log_error(LOG_LEVEL_ERROR,
+ "Invalid request line after applying header filters.");
+ free_http_request(http);
+
+ return JB_ERR_PARSE;
+ }
+
+ return JB_ERR_OK;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : chat
+ *
+ * Description : Once a connection to the client has been accepted,
+ * this function is called (via serve()) to handle the
+ * main business of the communication. When this
+ * function returns, the caller must close the client
+ * socket handle.
+ *
+ * FIXME: chat is nearly thousand lines long.
+ * Ridiculous.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void chat(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *hdr;
+ char *p;
+ fd_set rfds;
+ int n;
+ jb_socket maxfd;
+ int server_body;
+ int ms_iis5_hack = 0;
+ unsigned long long byte_count = 0;
+ int forwarded_connect_retries = 0;
+ int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
+ const struct forward_spec *fwd;
+ struct http_request *http;
+ long len = 0; /* for buffer sizes (and negative error codes) */
+
+ /* Function that does the content filtering for the current request */
+ filter_function_ptr content_filter = NULL;
+
+ /* Skeleton for HTTP response, if we should intercept the request */
+ struct http_response *rsp;
+ struct timeval timeout;
+
+ memset(buf, 0, sizeof(buf));
+
+ http = csp->http;
+
+ if (receive_client_request(csp) != JB_ERR_OK)
+ {
+ return;
+ }
+ if (parse_client_request(csp) != JB_ERR_OK)
+ {
+ return;
+ }
+
+ /* 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;
+ }
+
+ /*
+ * build the http request to send to the server
+ * we have to do one of the following:
+ *
+ * create = use the original HTTP request to create a new
+ * HTTP request that has either the path component
+ * without the http://domainspec (w/path) or the
+ * full orininal URL (w/url)
+ * Note that the path and/or the HTTP version may
+ * have been altered by now.
+ *
+ * connect = Open a socket to the host:port of the server
+ * and short-circuit server and client socket.
+ *
+ * pass = Pass the request unchanged if forwarding a CONNECT
+ * request to a parent proxy. Note that we'll be sending
+ * the CFAIL message ourselves if connecting to the parent
+ * fails, but we won't send a CSUCCEED message if it works,
+ * since that would result in a double message (ours and the
+ * parent's). After sending the request to the parent, we simply
+ * tunnel.
+ *
+ * here's the matrix:
+ * SSL
+ * 0 1
+ * +--------+--------+
+ * | | |
+ * 0 | create | connect|
+ * | w/path | |
+ * Forwarding +--------+--------+
+ * | | |
+ * 1 | create | pass |
+ * | w/url | |
+ * +--------+--------+
+ *
*/
- http->ocmd = strdup(http->cmd);
- if (http->ocmd == NULL)
+ if (http->ssl && connect_port_is_forbidden(csp))
{
- log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
+ const char *acceptable_connect_ports =
+ csp->action->string[ACTION_STRING_LIMIT_CONNECT];
+ assert(NULL != acceptable_connect_ports);
+ log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
+ "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
+ csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
+ csp->action->flags |= ACTION_BLOCK;
+ http->ssl = 0;
}
- /*
- * (Re)build the HTTP request for non-SSL requests.
- * If forwarding, use the whole URL, else, use only the path.
- */
if (http->ssl == 0)
{
- freez(http->cmd);
-
- http->cmd = strdup(http->gpc);
- string_append(&http->cmd, " ");
-
- if (fwd->forward_host)
- {
- string_append(&http->cmd, http->url);
- }
- else
- {
- string_append(&http->cmd, http->path);
- }
-
- string_append(&http->cmd, " ");
- string_append(&http->cmd, http->ver);
-
- if (http->cmd == NULL)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
- }
- }
- enlist(csp->headers, http->cmd);
-
-
-#ifdef FEATURE_COOKIE_JAR
- /*
- * If we're logging cookies in a cookie jar, and the user has not
- * supplied any wafers, and the user has not told us to suppress the
- * vanilla wafer, then send the vanilla wafer.
- */
- if ((csp->config->jarfile != NULL)
- && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
- && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
- {
- enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
+ freez(csp->headers->first->str);
+ build_request_line(csp, fwd, &csp->headers->first->str);
}
-#endif /* def FEATURE_COOKIE_JAR */
-
-
-#ifdef FEATURE_KILL_POPUPS
- block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
-#endif /* def FEATURE_KILL_POPUPS */
-
- pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
- ((csp->action->flags & ACTION_FILTER) != 0);
-
- gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
-
- /* grab the rest of the client's headers */
-
- while (FOREVER)
- {
- if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
- {
- n = read_socket(csp->cfd, buf, sizeof(buf));
- if (n <= 0)
- {
- log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
- return;
- }
- add_to_iob(csp, buf, n);
- continue;
- }
- if (p == NULL) break;
-
- enlist(csp->headers, p);
- freez(p);
- }
/*
- * We have a request. Now, check to see if we need to
- * intercept it, i.e. If ..
+ * We have a request. Check if one of the crunchers wants it.
*/
-
- if (
- /* a CGI call was detected and answered */
- (NULL != (rsp = dispatch_cgi(csp)))
-
- /* or we are enabled and... */
- || (IS_ENABLED_AND (
-
- /* ..the request was blocked */
- ( NULL != (rsp = block_url(csp)))
-
- /* ..or untrusted */
-#ifdef FEATURE_TRUST
- || ( NULL != (rsp = trust_url(csp)))
-#endif /* def FEATURE_TRUST */
-
- /* ..or a fast redirect kicked in */
-#ifdef FEATURE_FAST_REDIRECTS
- || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
- (NULL != (rsp = redirect_url(csp))))
-#endif /* def FEATURE_FAST_REDIRECTS */
- ))
- )
+ if (crunch_response_triggered(csp, crunchers_all))
{
- /* Write the answer to the client */
- if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
- || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
-
-#ifdef FEATURE_STATISTICS
- /* Count as a rejected request */
- csp->flags |= CSP_FLAG_REJECTED;
-#endif /* def FEATURE_STATISTICS */
-
- /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
- log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
+ /*
+ * Yes. The client got the crunch response
+ * and we are done here after cleaning up.
+ */
+ /* XXX: why list_remove_all()? */
+ list_remove_all(csp->headers);
- /* Clean up and return */
- free_http_response(rsp);
return;
}
if (fwd->forward_host)
{
- log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
- fwd->forward_host, fwd->forward_port, http->hostport);
+ log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
+ fwd->forward_host, fwd->forward_port, http->hostport);
}
else
{
/* here we connect to the server, gateway, or the forwarder */
- csp->sfd = forwarded_connect(fwd, http, csp);
-
- if (csp->sfd < 0)
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->sfd != JB_INVALID_SOCKET)
+ && socket_is_still_usable(csp->sfd)
+ && connection_destination_matches(&csp->server_connection, http, fwd))
{
- log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
- http->hostport);
-
- if (errno == EINVAL)
+ log_error(LOG_LEVEL_CONNECT,
+ "Reusing server socket %u. Opened for %s.",
+ csp->sfd, csp->server_connection.host);
+ }
+ else
+ {
+ if (csp->sfd != JB_INVALID_SOCKET)
{
- rsp = error_response(csp, "no-such-domain", errno);
-
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
- csp->ip_addr_str, http->ocmd);
+ log_error(LOG_LEVEL_CONNECT,
+ "Closing server socket %u. Opened for %s.",
+ csp->sfd, csp->server_connection.host);
+ close_socket(csp->sfd);
+ mark_connection_closed(&csp->server_connection);
}
- else
- {
- rsp = error_response(csp, "connect-failed", errno);
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
- csp->ip_addr_str, http->ocmd);
+ while ((csp->sfd = forwarded_connect(fwd, http, csp))
+ && (errno == EINVAL)
+ && (forwarded_connect_retries++ < max_forwarded_connect_retries))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "failed request #%u to connect to %s. Trying again.",
+ forwarded_connect_retries, http->hostport);
}
-
- /* Write the answer to the client */
- if(rsp)
+ if (csp->sfd == JB_INVALID_SOCKET)
{
- if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
- || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
+ if (fwd->type != SOCKS_NONE)
{
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
+ /* Socks error. */
+ rsp = error_response(csp, "forwarding-failed");
+ }
+ else if (errno == EINVAL)
+ {
+ rsp = error_response(csp, "no-such-domain");
+ }
+ else
+ {
+ rsp = error_response(csp, "connect-failed");
+ log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
+ http->hostport);
}
- }
- free_http_response(rsp);
- return;
- }
+ /* Write the answer to the client */
+ if (rsp != NULL)
+ {
+ send_crunch_response(csp, rsp);
+ }
- log_error(LOG_LEVEL_CONNECT, "OK");
+ return;
+ }
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ save_connection_destination(csp->sfd, http, fwd, &csp->server_connection);
+ csp->server_connection.keep_alive_timeout = (unsigned)csp->config->keep_alive_timeout;
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- hdr = sed(client_patterns, add_client_headers, csp);
+ hdr = list_to_text(csp->headers);
if (hdr == NULL)
{
/* FIXME Should handle error properly */
log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
}
-
list_remove_all(csp->headers);
if (fwd->forward_host || (http->ssl == 0))
{
- /* write the client's (modified) header to the server
+ /*
+ * Write the client's (modified) header to the server
* (along with anything else that may be in the buffer)
*/
-
- n = strlen(hdr);
-
- if ((write_socket(csp->sfd, hdr, n) != n)
- || (flush_socket(csp->sfd, csp ) < 0))
+ if (write_socket(csp->sfd, hdr, strlen(hdr))
+ || (flush_socket(csp->sfd, csp->iob) < 0))
{
- log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
- http->hostport);
-
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
- csp->ip_addr_str, http->ocmd);
-
- rsp = error_response(csp, "connect-failed", errno);
+ log_error(LOG_LEVEL_CONNECT,
+ "write header to: %s failed: %E", http->hostport);
- if(rsp)
+ rsp = error_response(csp, "connect-failed");
+ if (rsp)
{
- if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
- || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
+ send_crunch_response(csp, rsp);
}
- free_http_response(rsp);
freez(hdr);
return;
}
* so just send the "connect succeeded" message to the
* client, flush the rest, and get out of the way.
*/
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
- csp->ip_addr_str, http->ocmd);
-
- if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0)
+ if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
{
freez(hdr);
return;
IOB_RESET(csp);
}
+ log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
+
/* we're finished with the client's header */
freez(hdr);
- maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
+ maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
/* pass data between the client and server
* until one or the other shuts down the connection.
server_body = 0;
- while (FOREVER)
+ for (;;)
{
+#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
FD_SET(csp->cfd, &rfds);
FD_SET(csp->sfd, &rfds);
- n = select(maxfd+1, &rfds, NULL, NULL, NULL);
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->flags & CSP_FLAG_CHUNKED)
+ && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
+ && ((csp->iob->eod - csp->iob->cur) >= 5)
+ && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Looks like we read the last chunk together with "
+ "the server headers. We better stop reading.");
+ byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
+ csp->expected_content_length = byte_count;
+ csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
+ }
+ if (server_body && server_response_is_complete(csp, byte_count))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Done reading from server. Expected content length: %llu. "
+ "Actual content length: %llu. Most recently received: %d.",
+ csp->expected_content_length, byte_count, len);
+ len = 0;
+ /*
+ * XXX: should not jump around,
+ * chat() is complicated enough already.
+ */
+ goto reading_done;
+ }
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+ timeout.tv_sec = csp->config->socket_timeout;
+ timeout.tv_usec = 0;
+ n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
- if (n < 0)
+ if (n == 0)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Didn't receive data in time: %s", http->url);
+ if ((byte_count == 0) && (http->ssl == 0))
+ {
+ send_crunch_response(csp, error_response(csp, "connection-timeout"));
+ }
+ mark_server_socket_tainted(csp);
+ return;
+ }
+ else if (n < 0)
{
log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
+ mark_server_socket_tainted(csp);
return;
}
- /* this is the body of the browser's request
- * just read it and write it.
+ /*
+ * This is the body of the browser's request,
+ * just read and write it.
+ *
+ * XXX: Make sure the client doesn't use pipelining
+ * behind Privoxy's back.
*/
-
if (FD_ISSET(csp->cfd, &rfds))
{
- n = read_socket(csp->cfd, buf, sizeof(buf));
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
- if (n <= 0)
+ if (len <= 0)
{
+ /* XXX: not sure if this is necessary. */
+ mark_server_socket_tainted(csp);
break; /* "game over, man" */
}
- if (write_socket(csp->sfd, buf, n) != n)
+ if (write_socket(csp->sfd, buf, (size_t)len))
{
log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
+ mark_server_socket_tainted(csp);
return;
}
continue;
}
/*
- * The server wants to talk. It could be the header or the body.
+ * The server wants to talk. It could be the header or the body.
* If `hdr' is null, then it's the header otherwise it's the body.
* FIXME: Does `hdr' really mean `host'? No.
*/
-
-
if (FD_ISSET(csp->sfd, &rfds))
{
- fflush( 0 );
- n = read_socket(csp->sfd, buf, sizeof(buf) - 1);
+ fflush(NULL);
+ len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
- if (n < 0)
+ if (len < 0)
{
log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
- csp->ip_addr_str, http->ocmd);
-
- rsp = error_response(csp, "connect-failed", errno);
-
- if(rsp)
+ if (http->ssl && (fwd->forward_host == NULL))
{
- if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
- || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
+ /*
+ * Just hang up. We already confirmed the client's CONNECT
+ * request with status code 200 and unencrypted content is
+ * no longer welcome.
+ */
+ log_error(LOG_LEVEL_ERROR,
+ "CONNECT already confirmed. Unable to tell the client about the problem.");
+ return;
}
-
- free_http_response(rsp);
- return;
+ else if (byte_count)
+ {
+ /*
+ * Just hang up. We already transmitted the original headers
+ * and parts of the original content and therefore missed the
+ * chance to send an error message (without risking data corruption).
+ *
+ * XXX: we could retry with a fancy range request here.
+ */
+ log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
+ "Unable to tell the client about the problem.");
+ mark_server_socket_tainted(csp);
+ return;
+ }
+ /*
+ * XXX: Consider handling the cases above the same.
+ */
+ mark_server_socket_tainted(csp);
+ len = 0;
}
- /* Add a trailing zero. This lets filter_popups
- * use string operations.
- */
- buf[n] = '\0';
-
-#ifdef FEATURE_KILL_POPUPS
- /* Filter the popups on this read. */
- if (block_popups_now)
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (csp->flags & CSP_FLAG_CHUNKED)
{
- filter_popups(buf, csp);
+ if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
+ {
+ /* XXX: this is a temporary hack */
+ log_error(LOG_LEVEL_CONNECT,
+ "Looks like we reached the end of the last chunk. "
+ "We better stop reading.");
+ csp->expected_content_length = byte_count + (unsigned long long)len;
+ csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
+ }
}
-#endif /* def FEATURE_KILL_POPUPS */
+ reading_done:
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+ /*
+ * Add a trailing zero to let be able to use string operations.
+ * XXX: do we still need this with filter_popups gone?
+ */
+ buf[len] = '\0';
- /* Normally, this would indicate that we've read
+ /*
+ * Normally, this would indicate that we've read
* as much as the server has sent us and we can
* close the client connection. However, Microsoft
* in its wisdom has released IIS/5 with a bug that
* doesn't generate a valid header, then we won't
* transmit anything to the client.
*/
- if (n == 0)
+ if (len == 0)
{
if (server_body || http->ssl)
*/
if (content_filter)
{
+ p = execute_content_filter(csp, content_filter);
/*
* If the content filter fails, use the original
* buffer and length.
* (see p != NULL ? p : csp->iob->cur below)
*/
- if (NULL == (p = (*content_filter)(csp)))
+ if (NULL == p)
+ {
+ csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
+ }
+
+ if (JB_ERR_OK != update_server_headers(csp))
{
- csp->content_length = csp->iob->eod - csp->iob->cur;
+ log_error(LOG_LEVEL_FATAL,
+ "Failed to update server headers. after filtering.");
}
- hdr = sed(server_patterns, add_server_headers, csp);
+ hdr = list_to_text(csp->headers);
if (hdr == NULL)
{
/* FIXME Should handle error properly */
log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
}
- n = strlen(hdr);
-
- if ((write_socket(csp->cfd, hdr, n) != n)
- || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != (int)csp->content_length))
+ if (write_socket(csp->cfd, hdr, strlen(hdr))
+ || write_socket(csp->cfd,
+ ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
{
log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
+ freez(hdr);
+ freez(p);
+ mark_server_socket_tainted(csp);
return;
}
freez(hdr);
- if (NULL != p) {
- freez(p);
- }
+ freez(p);
}
break; /* "game over, man" */
* This is NOT the body, so
* Let's pretend the server just sent us a blank line.
*/
- n = sprintf(buf, "\r\n");
+ snprintf(buf, sizeof(buf), "\r\n");
+ len = (int)strlen(buf);
/*
* Now, let the normal header parsing algorithm below do its
* of the server document, just write it to the client,
* unless we need to buffer the body for later content-filtering
*/
-
if (server_body || http->ssl)
{
if (content_filter)
{
- add_to_iob(csp, buf, n);
-
/*
- * If the buffer limit will be reached on the next read,
- * switch to non-filtering mode, i.e. make & write the
- * header, flush the socket and get out of the way.
+ * If there is no memory left for buffering the content, or the buffer limit
+ * has been reached, switch to non-filtering mode, i.e. make & write the
+ * header, flush the iob and buf, and get out of the way.
*/
- if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
+ if (add_to_iob(csp, buf, len))
{
- log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
+ size_t hdrlen;
+ long flushed;
+
+ log_error(LOG_LEVEL_INFO,
+ "Flushing header and buffers. Stepping back from filtering.");
- hdr = sed(server_patterns, add_server_headers, csp);
+ hdr = list_to_text(csp->headers);
if (hdr == NULL)
{
- /* FIXME Should handle error properly */
- log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
+ /*
+ * Memory is too tight to even generate the header.
+ * Send our static "Out-of-memory" page.
+ */
+ log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
+ rsp = cgi_error_memory();
+ send_crunch_response(csp, rsp);
+ mark_server_socket_tainted(csp);
+ return;
}
+ hdrlen = strlen(hdr);
- n = strlen(hdr);
- byte_count += n;
-
- if (((write_socket(csp->cfd, hdr, n) != n)
- || (n = flush_socket(csp->cfd, csp) < 0)))
+ if (write_socket(csp->cfd, hdr, hdrlen)
+ || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
+ || (write_socket(csp->cfd, buf, (size_t)len)))
{
- log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
-
+ log_error(LOG_LEVEL_CONNECT,
+ "Flush header and buffers to client failed: %E");
freez(hdr);
+ mark_server_socket_tainted(csp);
return;
}
+ /*
+ * Reset the byte_count to the amount of bytes
+ * we just flushed. len will be added a few lines below,
+ * hdrlen doesn't matter for LOG_LEVEL_CLF.
+ */
+ byte_count = (unsigned long long)flushed;
freez(hdr);
- byte_count += n;
-
content_filter = NULL;
server_body = 1;
-
}
}
else
{
- if (write_socket(csp->cfd, buf, n) != n)
+ if (write_socket(csp->cfd, buf, (size_t)len))
{
log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
+ mark_server_socket_tainted(csp);
return;
}
}
- byte_count += n;
+ byte_count += (unsigned long long)len;
continue;
}
else
{
- /* we're still looking for the end of the
- * server's header ... (does that make header
- * parsing an "out of body experience" ?
+ const char *header_start;
+ /*
+ * We're still looking for the end of the server's header.
+ * Buffer up the data we just read. If that fails, there's
+ * little we can do but send our static out-of-memory page.
*/
-
- /* buffer up the data we just read */
- add_to_iob(csp, buf, n);
-
- /* get header lines from the iob */
-
- while ((p = get_header(csp)))
+ if (add_to_iob(csp, buf, len))
{
- if (*p == '\0')
- {
- /* see following note */
- break;
- }
- enlist(csp->headers, p);
- freez(p);
+ log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
+ rsp = cgi_error_memory();
+ send_crunch_response(csp, rsp);
+ mark_server_socket_tainted(csp);
+ return;
}
- /* NOTE: there are no "empty" headers so
- * if the pointer `p' is not NULL we must
- * assume that we reached the end of the
- * buffer before we hit the end of the header.
- */
+ header_start = csp->iob->cur;
- if (p)
+ /* Convert iob into something sed() can digest */
+ if (JB_ERR_PARSE == get_server_headers(csp))
{
if (ms_iis5_hack)
{
- /* Well, we tried our MS IIS/5
- * hack and it didn't work.
- * The header is incomplete
- * and there isn't anything
+ /*
+ * Well, we tried our MS IIS/5 hack and it didn't work.
+ * The header is incomplete and there isn't anything
* we can do about it.
*/
- break;
+ log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
+ "Applying the MS IIS5 hack didn't help.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ mark_server_socket_tainted(csp);
+ return;
}
else
{
- /* Since we have to wait for
- * more from the server before
- * we can parse the headers
- * we just continue here.
+ /*
+ * Since we have to wait for more from the server before
+ * we can parse the headers we just continue here.
*/
+ long header_offset = csp->iob->cur - header_start;
+ assert(csp->iob->cur >= header_start);
+ byte_count += (unsigned long long)(len - header_offset);
+ log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
+ "byte_count: %llu. header_offset: %d. len: %d.",
+ byte_count, header_offset, len);
continue;
}
}
- /* we have now received the entire header.
+ /* Did we actually get anything? */
+ if (NULL == csp->headers->first)
+ {
+ log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ send_crunch_response(csp, error_response(csp, "no-server-data"));
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+ return;
+ }
+
+ assert(csp->headers->first->str);
+ assert(!http->ssl);
+ if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
+ strncmpic(csp->headers->first->str, "ICY", 3))
+ {
+ /*
+ * It doesn't look like a HTTP (or Shoutcast) response:
+ * tell the client and log the problem.
+ */
+ if (strlen(csp->headers->first->str) > 30)
+ {
+ csp->headers->first->str[30] = '\0';
+ }
+ log_error(LOG_LEVEL_ERROR,
+ "Invalid server or forwarder response. Starts with: %s",
+ csp->headers->first->str);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+ return;
+ }
+
+ /*
+ * We have now received the entire server header,
* filter it and send the result to the client
*/
-
- hdr = sed(server_patterns, add_server_headers, csp);
+ if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
+ }
+ hdr = list_to_text(csp->headers);
if (hdr == NULL)
{
/* FIXME Should handle error properly */
log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
}
- n = strlen(hdr);
-
- /* write the server's (modified) header to
- * the client (along with anything else that
- * may be in the buffer)
- */
-
-#ifdef FEATURE_KILL_POPUPS
- /* Start blocking popups if appropriate. */
-
- if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
- !http->ssl && /* We talk plaintext */
- block_popups) /* Policy allows */
+ if (crunch_response_triggered(csp, crunchers_light))
{
- block_popups_now = 1;
/*
- * Filter the part of the body that came in the same read
- * as the last headers:
+ * One of the tags created by a server-header
+ * tagger triggered a crunch. We already
+ * delivered the crunch response to the client
+ * and are done here after cleaning up.
*/
- filter_popups(csp->iob->cur, csp);
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+ return;
}
-
-#endif /* def FEATURE_KILL_POPUPS */
-
/* Buffer and pcrs filter this if appropriate. */
- if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
- !http->ssl && /* We talk plaintext */
- pcrs_filter) /* Policy allows */
- {
- content_filter = pcrs_filter_response;
- }
-
- /* Buffer and gif_deanimate this if appropriate. */
-
- if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
- !http->ssl && /* We talk plaintext */
- gif_deanimate) /* Policy allows */
+ if (!http->ssl) /* We talk plaintext */
{
- content_filter = gif_deanimate_response;
+ content_filter = get_filter_function(csp);
}
-
-
/*
* Only write if we're not buffering for content modification
*/
- if (!content_filter && ((write_socket(csp->cfd, hdr, n) != n)
- || (n = flush_socket(csp->cfd, csp) < 0)))
+ if (!content_filter)
{
- log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
+ /*
+ * Write the server's (modified) header to
+ * the client (along with anything else that
+ * may be in the buffer)
+ */
+
+ if (write_socket(csp->cfd, hdr, strlen(hdr))
+ || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
+ {
+ log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
+
+ /*
+ * The write failed, so don't bother mentioning it
+ * to the client... it probably can't hear us anyway.
+ */
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+ return;
+ }
- /* the write failed, so don't bother
- * mentioning it to the client...
- * it probably can't hear us anyway.
+ byte_count += (unsigned long long)len;
+ }
+ else
+ {
+ /*
+ * XXX: the header lenght should probably
+ * be calculated by get_server_headers().
*/
- freez(hdr);
- return;
+ long header_length = csp->iob->cur - header_start;
+ assert(csp->iob->cur > header_start);
+ byte_count += (unsigned long long)(len - header_length);
}
- if(!content_filter) byte_count += n;
-
/* we're finished with the server's header */
freez(hdr);
server_body = 1;
- /* If this was a MS IIS/5 hack then it means
- * the server has already closed the
- * connection. Nothing more to read. Time
- * to bail.
+ /*
+ * If this was a MS IIS/5 hack then it means the server
+ * has already closed the connection. Nothing more to read.
+ * Time to bail.
*/
if (ms_iis5_hack)
{
- break;
+ log_error(LOG_LEVEL_ERROR,
+ "Closed server connection detected. "
+ "Applying the MS IIS5 hack didn't help.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ mark_server_socket_tainted(csp);
+ return;
}
}
continue;
}
-
+ mark_server_socket_tainted(csp);
return; /* huh? we should never get here */
}
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
- csp->ip_addr_str, http->ocmd, byte_count);
+ if (csp->content_length == 0)
+ {
+ /*
+ * If Privoxy didn't recalculate the Content-Lenght,
+ * byte_count is still correct.
+ */
+ csp->content_length = byte_count;
+ }
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
+ && (csp->expected_content_length != byte_count))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Received %llu bytes while expecting %llu.",
+ byte_count, csp->expected_content_length);
+ mark_server_socket_tainted(csp);
+ }
+#endif
+
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
+ csp->ip_addr_str, http->ocmd, csp->content_length);
}
* Function : serve
*
* Description : This is little more than chat. We only "serve" to
- * to close any socket that chat may have opened.
+ * to close (or remember) any socket that chat may have
+ * opened.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
static void serve(struct client_state *csp)
#endif /* def AMIGA */
{
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ static int monitor_thread_running = 0;
+ int continue_chatting = 0;
+ do
+ {
+ chat(csp);
+
+ continue_chatting = (csp->config->feature_flags
+ & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
+ && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
+ && (csp->cfd != JB_INVALID_SOCKET)
+ && (csp->sfd != JB_INVALID_SOCKET)
+ && socket_is_still_usable(csp->sfd);
+
+ if (continue_chatting)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client request. "
+ "Keeping the server socket %d to %s open.",
+ csp->sfd, csp->server_connection.host);
+
+ if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
+ && data_is_available(csp->cfd, (int)csp->server_connection.keep_alive_timeout)
+ && socket_is_still_usable(csp->cfd))
+ {
+ log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
+ "time or the client closed the connection.");
+ /*
+ * Get the csp in a mostly vergin state again.
+ * XXX: Should be done elsewhere.
+ */
+ csp->content_type = 0;
+ csp->content_length = 0;
+ csp->expected_content_length = 0;
+ list_remove_all(csp->headers);
+ freez(csp->iob->buf);
+ memset(csp->iob, 0, sizeof(csp->iob));
+ freez(csp->error_message);
+ free_http_request(csp->http);
+ destroy_list(csp->headers);
+ destroy_list(csp->tags);
+ free_current_action(csp->action);
+ if (NULL != csp->fwd)
+ {
+ unload_forward_spec(csp->fwd);
+ csp->fwd = NULL;
+ }
+
+ /* XXX: Store per-connection flags someplace else. */
+ csp->flags = CSP_FLAG_ACTIVE | (csp->flags & CSP_FLAG_TOGGLED_ON);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "No additional client request received in time.");
+ if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING))
+ {
+ remember_connection(csp->sfd, csp->http,
+ forward_url(csp, csp->http),
+ csp->server_connection.keep_alive_timeout);
+ csp->sfd = JB_INVALID_SOCKET;
+ close_socket(csp->cfd);
+ csp->cfd = JB_INVALID_SOCKET;
+ privoxy_mutex_lock(&connection_reuse_mutex);
+ if (!monitor_thread_running)
+ {
+ monitor_thread_running = 1;
+ privoxy_mutex_unlock(&connection_reuse_mutex);
+ wait_for_alive_connections();
+ privoxy_mutex_lock(&connection_reuse_mutex);
+ monitor_thread_running = 0;
+ }
+ privoxy_mutex_unlock(&connection_reuse_mutex);
+ }
+ break;
+ }
+ }
+ else if (csp->sfd != JB_INVALID_SOCKET)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "The connection on server socket %d to %s isn't reusable. "
+ "Closing.", csp->sfd, csp->server_connection.host);
+ }
+ } while (continue_chatting);
+
+ mark_connection_closed(&csp->server_connection);
+#else
chat(csp);
- close_socket(csp->cfd);
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- if (csp->sfd >= 0)
+ if (csp->sfd != JB_INVALID_SOCKET)
{
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ forget_connection(csp->sfd);
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
close_socket(csp->sfd);
}
+ if (csp->cfd != JB_INVALID_SOCKET)
+ {
+ close_socket(csp->cfd);
+ }
+
csp->flags &= ~CSP_FLAG_ACTIVE;
}
#endif
+#if !defined(_WIN32) || defined(_WIN_CONSOLE)
/*********************************************************************
*
* Function : usage
* Returns : No. ,-)
*
*********************************************************************/
-void usage(const char *myname)
+static void usage(const char *myname)
{
- printf("JunkBuster proxy version " VERSION " (" HOME_PAGE_URL ")\n"
- "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [configfile]\n"
- "Aborting.\n", myname);
-
+ printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
+ "Usage: %s "
+#if defined(unix)
+ "[--chroot] "
+#endif /* defined(unix) */
+ "[--help] "
+#if defined(unix)
+ "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
+#endif /* defined(unix) */
+ "[--version] [configfile]\n"
+ "Aborting\n", myname);
+
exit(2);
}
+#endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
+
+
+#ifdef MUTEX_LOCKS_AVAILABLE
+/*********************************************************************
+ *
+ * Function : privoxy_mutex_lock
+ *
+ * Description : Locks a mutex.
+ *
+ * Parameters :
+ * 1 : mutex = The mutex to lock.
+ *
+ * Returns : Void. May exit in case of errors.
+ *
+ *********************************************************************/
+void privoxy_mutex_lock(privoxy_mutex_t *mutex)
+{
+#ifdef FEATURE_PTHREAD
+ int err = pthread_mutex_lock(mutex);
+ if (err)
+ {
+ if (mutex != &log_mutex)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Mutex locking failed: %s.\n", strerror(err));
+ }
+ exit(1);
+ }
+#else
+ EnterCriticalSection(mutex);
+#endif /* def FEATURE_PTHREAD */
+}
+
+
+/*********************************************************************
+ *
+ * Function : privoxy_mutex_unlock
+ *
+ * Description : Unlocks a mutex.
+ *
+ * Parameters :
+ * 1 : mutex = The mutex to unlock.
+ *
+ * Returns : Void. May exit in case of errors.
+ *
+ *********************************************************************/
+void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
+{
+#ifdef FEATURE_PTHREAD
+ int err = pthread_mutex_unlock(mutex);
+ if (err)
+ {
+ if (mutex != &log_mutex)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Mutex unlocking failed: %s.\n", strerror(err));
+ }
+ exit(1);
+ }
+#else
+ LeaveCriticalSection(mutex);
+#endif /* def FEATURE_PTHREAD */
+}
+
+
+/*********************************************************************
+ *
+ * Function : privoxy_mutex_init
+ *
+ * Description : Prepares a mutex.
+ *
+ * Parameters :
+ * 1 : mutex = The mutex to initialize.
+ *
+ * Returns : Void. May exit in case of errors.
+ *
+ *********************************************************************/
+static void privoxy_mutex_init(privoxy_mutex_t *mutex)
+{
+#ifdef FEATURE_PTHREAD
+ int err = pthread_mutex_init(mutex, 0);
+ if (err)
+ {
+ printf("Fatal error. Mutex initialization failed: %s.\n",
+ strerror(err));
+ exit(1);
+ }
+#else
+ InitializeCriticalSection(mutex);
+#endif /* def FEATURE_PTHREAD */
+}
+#endif /* def MUTEX_LOCKS_AVAILABLE */
+
+/*********************************************************************
+ *
+ * Function : initialize_mutexes
+ *
+ * Description : Prepares mutexes if mutex support is available.
+ *
+ * Parameters : None
+ *
+ * Returns : Void, exits in case of errors.
+ *
+ *********************************************************************/
+static void initialize_mutexes(void)
+{
+#ifdef MUTEX_LOCKS_AVAILABLE
+ /*
+ * Prepare global mutex semaphores
+ */
+ privoxy_mutex_init(&log_mutex);
+ privoxy_mutex_init(&log_init_mutex);
+ privoxy_mutex_init(&connection_reuse_mutex);
+
+ /*
+ * XXX: The assumptions below are a bit naive
+ * and can cause locks that aren't necessary.
+ *
+ * For example older FreeBSD versions (< 6.x?)
+ * have no gethostbyname_r, but gethostbyname is
+ * thread safe.
+ */
+#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
+ privoxy_mutex_init(&resolver_mutex);
+#endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
+ /*
+ * XXX: should we use a single mutex for
+ * localtime() and gmtime() as well?
+ */
+#ifndef HAVE_GMTIME_R
+ privoxy_mutex_init(&gmtime_mutex);
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_LOCALTIME_R
+ privoxy_mutex_init(&localtime_mutex);
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_RANDOM
+ privoxy_mutex_init(&rand_mutex);
+#endif /* ndef HAVE_RANDOM */
+#endif /* def MUTEX_LOCKS_AVAILABLE */
+}
/*********************************************************************
#endif
{
int argc_pos = 0;
+ unsigned int random_seed;
+#ifdef unix
+ struct passwd *pw = NULL;
+ struct group *grp = NULL;
+ char *p;
+ int do_chroot = 0;
+ char *pre_chroot_nslookup_to_load_resolver = NULL;
+#endif
Argc = argc;
Argv = argv;
#endif
;
+ /* Prepare mutexes if supported and necessary. */
+ initialize_mutexes();
+
+ /* Enable logging until further notice. */
+ init_log_module();
+
/*
* Parse the command line arguments
+ *
+ * XXX: simply printing usage information in case of
+ * invalid arguments isn't particularly user friendly.
*/
while (++argc_pos < argc)
{
+#ifdef _WIN32
+ /* Check to see if the service must be installed or uninstalled */
+ if (strncmp(argv[argc_pos], "--install", 9) == 0)
+ {
+ const char *pName = argv[argc_pos] + 9;
+ if (*pName == ':')
+ pName++;
+ exit( (install_service(pName)) ? 0 : 1 );
+ }
+ else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
+ {
+ const char *pName = argv[argc_pos] + 11;
+ if (*pName == ':')
+ pName++;
+ exit((uninstall_service(pName)) ? 0 : 1);
+ }
+ else if (strcmp(argv[argc_pos], "--service" ) == 0)
+ {
+ bRunAsService = TRUE;
+ w32_set_service_cwd();
+ atexit(w32_service_exit_notify);
+ }
+ else
+#endif /* defined(_WIN32) */
+
+
#if !defined(_WIN32) || defined(_WIN_CONSOLE)
if (strcmp(argv[argc_pos], "--help") == 0)
else if(strcmp(argv[argc_pos], "--version") == 0)
{
- printf("Junkbuster version " VERSION " (" HOME_PAGE_URL ")\n");
+ printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
exit(0);
}
+#if defined(unix)
+
else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
{
+ set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
no_daemon = 1;
}
if (++argc_pos == argc) usage(argv[0]);
pidfile = strdup(argv[argc_pos]);
}
+
+ else if (strcmp(argv[argc_pos], "--user" ) == 0)
+ {
+ if (++argc_pos == argc) usage(argv[argc_pos]);
+
+ if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
+ {
+ *p++ = '\0';
+ if (NULL == (grp = getgrnam(p)))
+ {
+ log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
+ }
+ }
+
+ if (NULL == (pw = getpwnam(argv[argc_pos])))
+ {
+ log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
+ }
+
+ if (p != NULL) *--p = '\0';
+ }
+
+ else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
+ {
+ if (++argc_pos == argc) usage(argv[0]);
+ pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
+ }
+
+ else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
+ {
+ do_chroot = 1;
+ }
+#endif /* defined(unix) */
+
+ else if (argc_pos + 1 != argc)
+ {
+ /*
+ * This is neither the last command line
+ * option, nor was it recognized before,
+ * therefore it must be invalid.
+ */
+ usage(argv[0]);
+ }
else
+
#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
{
configfile = argv[argc_pos];
} /* -END- while (more arguments) */
+ show_version(Argv[0]);
+
#if defined(unix)
if ( *configfile != '/' )
{
+ char cwd[BUFFER_SIZE];
char *abs_file;
+ size_t abs_file_size;
/* make config-filename absolute here */
- if ( !(basedir = getcwd( NULL, 1024 )))
+ if (NULL == getcwd(cwd, sizeof(cwd)))
{
- perror("get working dir failed");
+ perror("failed to get current working directory");
exit( 1 );
}
- if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
+ /* XXX: why + 5? */
+ abs_file_size = strlen(cwd) + strlen(configfile) + 5;
+ basedir = strdup(cwd);
+
+ if (NULL == basedir ||
+ NULL == (abs_file = malloc(abs_file_size)))
{
perror("malloc failed");
exit( 1 );
}
- strcpy( abs_file, basedir );
- strcat( abs_file, "/" );
- strcat( abs_file, configfile );
+ strlcpy(abs_file, basedir, abs_file_size);
+ strlcat(abs_file, "/", abs_file_size );
+ strlcat(abs_file, configfile, abs_file_size);
configfile = abs_file;
}
#endif /* defined unix */
files->next = NULL;
+ clients->next = NULL;
+ /* XXX: factor out initialising after the next stable release. */
#ifdef AMIGA
InitAmiga();
#elif defined(_WIN32)
InitWin32();
#endif
+ random_seed = (unsigned int)time(NULL);
+#ifdef HAVE_RANDOM
+ srandom(random_seed);
+#else
+ srand(random_seed);
+#endif /* ifdef HAVE_RANDOM */
+
/*
* Unix signal handling
*
* Catch the abort, interrupt and terminate signals for a graceful exit
* Catch the hangup signal so the errlog can be reopened.
- * Ignore the broken pipe and child signals
- * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
+ * Ignore the broken pipe signals (FIXME: Why?)
*/
#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
{
int idx;
- const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
- const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
+ const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
+ const int ignored_signals[] = { SIGPIPE, 0 };
for (idx = 0; catched_signals[idx] != 0; idx++)
{
+#ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
+ if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
+#else
if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
+#endif /* ifdef sun */
{
log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
}
* We *are* in a windows console app.
* Print a verbose messages about FAQ's and such
*/
- printf(win32_blurb);
+ printf("%s", win32_blurb);
# endif /* def _WIN_CONSOLE */
#endif /* def _WIN32 */
close ( fd );
}
#endif /* 1 */
- /* FIXME: should close stderr (fd 2) here too, but the test
- * for existence
- * and load config file is done in listen_loop() and puts
- * some messages on stderr there.
+ /*
+ * stderr (fd 2) will be closed later on,
+ * when the config file has been parsed.
*/
close( 0 );
close( 1 );
chdir("/");
- write_pid_file();
-
} /* -END- if (!no_daemon) */
+
+ /*
+ * As soon as we have written the PID file, we can switch
+ * to the user and group ID indicated by the --user option
+ */
+ write_pid_file();
+
+ if (NULL != pw)
+ {
+ if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
+ }
+ if (NULL != grp)
+ {
+ if (setgroups(1, &grp->gr_gid))
+ {
+ log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
+ }
+ }
+ else if (initgroups(pw->pw_name, pw->pw_gid))
+ {
+ log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
+ }
+ if (do_chroot)
+ {
+ if (!pw->pw_dir)
+ {
+ log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
+ }
+ /* Read the time zone file from /etc before doing chroot. */
+ tzset();
+ if (NULL != pre_chroot_nslookup_to_load_resolver
+ && '\0' != pre_chroot_nslookup_to_load_resolver[0])
+ {
+ /* Initialize resolver library. */
+ (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
+ }
+ if (chroot(pw->pw_dir) < 0)
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
+ }
+ if (chdir ("/"))
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
+ }
+ }
+ if (setuid(pw->pw_uid))
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
+ }
+ if (do_chroot)
+ {
+ char putenv_dummy[64];
+
+ strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
+ if (putenv(putenv_dummy) != 0)
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
+ }
+
+ snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
+ if (putenv(putenv_dummy) != 0)
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
+ }
+ }
+ }
+ else if (do_chroot)
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
+ }
}
#endif /* defined unix */
+#ifdef _WIN32
+ /* This will be FALSE unless the command line specified --service
+ */
+ if (bRunAsService)
+ {
+ /* Yup, so now we must attempt to establish a connection
+ * with the service dispatcher. This will only work if this
+ * process was launched by the service control manager to
+ * actually run as a service. If this isn't the case, i've
+ * known it take around 30 seconds or so for the call to return.
+ */
+
+ /* The StartServiceCtrlDispatcher won't return until the service is stopping */
+ if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
+ {
+ /* Service has run, and at this point is now being stopped, so just return */
+ return 0;
+ }
+
+#ifdef _WIN_CONSOLE
+ printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
+#endif
+ /* An error occurred. Usually it's because --service was wrongly specified
+ * and we were unable to connect to the Service Control Dispatcher because
+ * it wasn't expecting us and is therefore not listening.
+ *
+ * For now, just continue below to call the listen_loop function.
+ */
+ }
+#endif /* def _WIN32 */
+
listen_loop();
/* NOTREACHED */
* on failure.
*
* Parameters :
- * 1 : config = Junkbuster configuration. Specifies port
+ * 1 : config = Privoxy configuration. Specifies port
* to bind to.
*
* Returns : Port that was opened.
*
*********************************************************************/
-static int bind_port_helper(struct configuration_spec * config)
+static jb_socket bind_port_helper(struct configuration_spec * config)
{
- int bfd;
+ int result;
+ jb_socket bfd;
- if ( (config->haddr != NULL)
- && (config->haddr[0] == '1')
- && (config->haddr[1] == '2')
- && (config->haddr[2] == '7')
- && (config->haddr[3] == '.') )
- {
- log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
- config->hport);
- }
- else if (config->haddr == NULL)
+ if (config->haddr == NULL)
{
log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
config->hport);
config->hport, config->haddr);
}
- bfd = bind_port(config->haddr, config->hport);
+ result = bind_port(config->haddr, config->hport, &bfd);
- if (bfd < 0)
+ if (result < 0)
{
- log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
- "- There may be another junkbuster or some other "
- "proxy running on port %d",
- (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
- config->hport, config->hport
- );
+ switch(result)
+ {
+ case -3 :
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
+ "There may be another Privoxy or some other "
+ "proxy running on port %d",
+ (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
+ config->hport, config->hport);
+
+ case -2 :
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
+ "The hostname is not resolvable",
+ (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
+
+ default :
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
+ (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
+ }
+
/* shouldn't get here */
- return -1;
+ return JB_INVALID_SOCKET;
}
config->need_bind = 0;
}
+#ifdef _WIN32
+/* Without this simple workaround we get this compiler warning from _beginthread
+ * warning C4028: formal parameter 1 different from declaration
+ */
+void w32_service_listen_loop(void *p)
+{
+ listen_loop();
+}
+#endif /* def _WIN32 */
+
+
/*********************************************************************
*
* Function : listen_loop
static void listen_loop(void)
{
struct client_state *csp = NULL;
- int bfd;
- struct configuration_spec * config;
+ jb_socket bfd;
+ struct configuration_spec *config;
+ unsigned int active_threads = 0;
config = load_config();
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ /*
+ * XXX: Should be relocated once it no
+ * longer needs to emit log messages.
+ */
+ initialize_reusable_connections();
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
bfd = bind_port_helper(config);
- while (FOREVER)
+#ifdef FEATURE_GRACEFUL_TERMINATION
+ while (!g_terminate)
+#else
+ for (;;)
+#endif
{
#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
while (waitpid(-1, NULL, WNOHANG) > 0)
/*
* Free data that was used by died threads
*/
- sweep();
+ active_threads = sweep();
#if defined(unix)
/*
*/
if (received_hup_signal)
{
- init_error_log(Argv[0], config->logfile, config->debug);
+ if (NULL != config->logfile)
+ {
+ init_error_log(Argv[0], config->logfile);
+ }
received_hup_signal = 0;
}
#endif
}
csp->flags |= CSP_FLAG_ACTIVE;
- csp->sfd = -1;
+ csp->sfd = JB_INVALID_SOCKET;
csp->config = config = load_config();
{
/*
* Since we were listening to the "old port", we will not see
- * a "listen" param change until the next IJB request. So, at
+ * a "listen" param change until the next request. So, at
* least 1 more request must be made for us to find the new
* setting. I am simply closing the old socket and binding the
* new one.
bfd = bind_port_helper(config);
}
- log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
+ log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
if (!accept_connection(csp, bfd))
{
}
else
{
- log_error(LOG_LEVEL_CONNECT, "OK");
+ log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
}
#ifdef FEATURE_TOGGLE
- if (g_bToggleIJB)
+ if (global_toggle_state)
+#endif /* def FEATURE_TOGGLE */
{
csp->flags |= CSP_FLAG_TOGGLED_ON;
}
-#endif /* def FEATURE_TOGGLE */
if (run_loader(csp))
{
#ifdef FEATURE_ACL
if (block_acl(NULL,csp))
{
- log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
+ log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
close_socket(csp->cfd);
+ freez(csp->ip_addr_str);
freez(csp);
continue;
}
#endif /* def FEATURE_ACL */
+ if ((0 != config->max_client_connections)
+ && (active_threads >= config->max_client_connections))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Rejecting connection from %s. Maximum number of connections reached.",
+ csp->ip_addr_str);
+ write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
+ strlen(TOO_MANY_CONNECTIONS_RESPONSE));
+ close_socket(csp->cfd);
+ freez(csp->ip_addr_str);
+ freez(csp);
+ continue;
+ }
+
/* add it to the list of clients */
csp->next = clients->next;
clients->next = csp;
pthread_attr_init(&attrs);
pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
- child_id = (pthread_create(&the_thread, &attrs,
- (void*)serve, csp) ? -1 : 0);
+ errno = pthread_create(&the_thread, &attrs,
+ (void * (*)(void *))serve, csp);
+ child_id = errno ? -1 : 0;
pthread_attr_destroy(&attrs);
}
#endif
#if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
#define SELECTED_ONE_OPTION
child_id = _beginthread(
- (void*)serve,
+ (void (*)(void *))serve,
64 * 1024,
csp);
#endif
#if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
#define SELECTED_ONE_OPTION
child_id = _beginthread(
- serve,
+ (void(* _Optlink)(void*))serve,
NULL,
64 * 1024,
csp);
#if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
#define SELECTED_ONE_OPTION
csp->cfd = ReleaseSocket(csp->cfd, -1);
- if((child_id = (int)CreateNewProcTags(
- NP_Entry, (ULONG)server_thread,
- NP_Output, Output(),
- NP_CloseOutput, FALSE,
- NP_Name, (ULONG)"junkbuster child",
- NP_StackSize, 200*1024,
- TAG_DONE)))
+
+#ifdef __amigaos4__
+ child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
+ NP_Output, Output(),
+ NP_CloseOutput, FALSE,
+ NP_Name, (ULONG)"privoxy child",
+ NP_Child, TRUE,
+ TAG_DONE);
+#else
+ child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
+ NP_Output, Output(),
+ NP_CloseOutput, FALSE,
+ NP_Name, (ULONG)"privoxy child",
+ NP_StackSize, 200*1024,
+ TAG_DONE);
+#endif
+ if(0 != child_id)
{
childs++;
((struct Task *)child_id)->tc_UserData = csp;
*/
if (child_id == 0) /* child */
{
+ int rc = 0;
+#ifdef FEATURE_TOGGLE
+ int inherited_toggle_state = global_toggle_state;
+#endif /* def FEATURE_TOGGLE */
+
serve(csp);
- _exit(0);
+ /*
+ * If we've been toggled or we've blocked the request, tell Mom
+ */
+
+#ifdef FEATURE_TOGGLE
+ if (inherited_toggle_state != global_toggle_state)
+ {
+ rc |= RC_FLAG_TOGGLED;
+ }
+#endif /* def FEATURE_TOGGLE */
+
+#ifdef FEATURE_STATISTICS
+ if (csp->flags & CSP_FLAG_REJECTED)
+ {
+ rc |= RC_FLAG_BLOCKED;
+ }
+#endif /* ndef FEATURE_STATISTICS */
+
+ _exit(rc);
}
else if (child_id > 0) /* parent */
{
* copy of the client socket and the CSP
* are not used.
*/
+ int child_status;
+#if !defined(_WIN32) && !defined(__CYGWIN__)
+
+ wait( &child_status );
+
+ /*
+ * Evaluate child's return code: If the child has
+ * - been toggled, toggle ourselves
+ * - blocked its request, bump up the stats counter
+ */
+
+#ifdef FEATURE_TOGGLE
+ if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
+ {
+ global_toggle_state = !global_toggle_state;
+ }
+#endif /* def FEATURE_TOGGLE */
+
+#ifdef FEATURE_STATISTICS
+ urls_read++;
+ if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
+ {
+ urls_rejected++;
+ }
+#endif /* def FEATURE_STATISTICS */
-#if !defined(_WIN32) && defined(__CYGWIN__)
- wait( NULL );
#endif /* !defined(_WIN32) && defined(__CYGWIN__) */
close_socket(csp->cfd);
csp->flags &= ~CSP_FLAG_ACTIVE;
#undef SELECTED_ONE_OPTION
/* end of cpp switch () */
- if (child_id < 0) /* failed */
+ if (child_id < 0)
{
- char buf[BUFFER_SIZE];
-
- log_error(LOG_LEVEL_ERROR, "can't fork: %E");
-
- sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
-
- write_socket(csp->cfd, buf, strlen(buf));
+ /*
+ * Spawning the child failed, assume it's because
+ * there are too many children running already.
+ * XXX: If you assume ...
+ */
+ log_error(LOG_LEVEL_ERROR,
+ "Unable to take any additional connections: %E");
+ write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
+ strlen(TOO_MANY_CONNECTIONS_RESPONSE));
close_socket(csp->cfd);
csp->flags &= ~CSP_FLAG_ACTIVE;
- sleep(5);
- continue;
}
}
else
serve(csp);
}
}
- /* NOTREACHED */
+
+ /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
+
+ /* Clean up. Aim: free all memory (no leaks) */
+#ifdef FEATURE_GRACEFUL_TERMINATION
+
+ log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
+
+ unload_current_config_file();
+ unload_current_actions_file();
+ unload_current_re_filterfile();
+#ifdef FEATURE_TRUST
+ unload_current_trust_file();
+#endif
+
+ if (config->multi_threaded)
+ {
+ int i = 60;
+ do
+ {
+ sleep(1);
+ sweep();
+ } while ((clients->next != NULL) && (--i > 0));
+
+ if (i <= 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
+ }
+ }
+ sweep();
+ sweep();
+
+#if defined(unix)
+ freez(basedir);
+#endif
+ freez(configfile);
+
+#if defined(_WIN32) && !defined(_WIN_CONSOLE)
+ /* Cleanup - remove taskbar icon etc. */
+ TermLogWindow();
+#endif
+
+ exit(0);
+#endif /* FEATURE_GRACEFUL_TERMINATION */
}
projects / privoxy.git / blobdiff