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jcc.c
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jcc.c
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/*********************************************************************
*
* 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) 2001-2018 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
* Junkbusters Corporation. http://www.junkbusters.com
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* The GNU General Public License should be included with
* this file. If not, you can view it at
* http://www.gnu.org/copyleft/gpl.html
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*********************************************************************/
#include "config.h"
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#ifdef _WIN32
# ifndef FEATURE_PTHREAD
# ifndef STRICT
# define STRICT
# endif
# include <winsock2.h>
# include <windows.h>
# include <process.h>
# endif /* ndef FEATURE_PTHREAD */
# include "win32.h"
# ifndef _WIN_CONSOLE
# include "w32log.h"
# endif /* ndef _WIN_CONSOLE */
# include "w32svrapi.h"
#else /* ifndef _WIN32 */
# if !defined (__OS2__)
# include <unistd.h>
# include <sys/wait.h>
# endif /* ndef __OS2__ */
# include <sys/time.h>
# include <sys/stat.h>
# include <sys/ioctl.h>
#ifdef sun
#include <sys/termios.h>
#endif /* sun */
#ifdef unix
#include <pwd.h>
#include <grp.h>
#endif
# include <signal.h>
# ifdef __BEOS__
# include <socket.h> /* BeOS has select() for sockets only. */
# include <OS.h> /* declarations for threads and stuff. */
# endif
# if defined(__EMX__) || defined(__OS2__)
# include <sys/select.h> /* OS/2/EMX needs a little help with select */
# endif
# ifdef __OS2__
#define INCL_DOS
# include <os2.h>
# endif
#ifdef HAVE_POLL
#ifdef __GLIBC__
#include <sys/poll.h>
#else
#include <poll.h>
#endif /* def __GLIBC__ */
#else
# ifndef FD_ZERO
# include <select.h>
# endif
#warning poll() appears to be unavailable. Your platform will become unsupported in the future.
#endif /* HAVE_POLL */
#endif
#include "project.h"
#include "list.h"
#include "jcc.h"
#include "filters.h"
#include "loaders.h"
#include "parsers.h"
#include "miscutil.h"
#include "errlog.h"
#include "jbsockets.h"
#include "gateway.h"
#include "actions.h"
#include "cgi.h"
#include "loadcfg.h"
#include "urlmatch.h"
#ifdef FEATURE_CLIENT_TAGS
#include "client-tags.h"
#endif
int daemon_mode = 1;
struct client_states clients[1];
struct file_list files[1];
#ifdef FEATURE_STATISTICS
int urls_read = 0; /* total nr of urls read inc rejected */
int urls_rejected = 0; /* total nr of urls rejected */
#endif /* def FEATURE_STATISTICS */
#ifdef FEATURE_GRACEFUL_TERMINATION
int g_terminate = 0;
#endif
#if !defined(_WIN32) && !defined(__OS2__)
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 void release_mutexes(void);
static jb_socket bind_port_helper(const char *haddr, int hport, int backlog);
static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
static void close_ports_helper(jb_socket sockets[]);
static void listen_loop(void);
static void serve(struct client_state *csp);
#ifdef __BEOS__
static int32 server_thread(void *data);
#endif /* def __BEOS__ */
#ifdef _WIN32
#define sleep(N) Sleep(((N) * 1000))
#endif
#ifdef __OS2__
#define sleep(N) DosSleep(((N) * 100))
#endif
#ifdef FUZZ
int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
void show_fuzz_usage(const char *name);
#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;
#ifdef FEATURE_EXTERNAL_FILTERS
privoxy_mutex_t external_filter_mutex;
#endif
#ifdef FEATURE_CLIENT_TAGS
privoxy_mutex_t client_tags_mutex;
#endif
#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 */
#if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
privoxy_mutex_t rand_mutex;
#endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
#endif /* def MUTEX_LOCKS_AVAILABLE */
#if defined(unix)
const char *basedir = NULL;
const char *pidfile = NULL;
static int received_hup_signal = 0;
#endif /* defined unix */
/* HTTP snipplets. */
static const char CSUCCEED[] =
"HTTP/1.1 200 Connection established\r\n\r\n";
static const char CHEADER[] =
"HTTP/1.1 400 Invalid header received from client\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/1.1 400 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/1.1 400 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/1.1 400 Bad request received from client\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/1.1 502 Server or forwarder response invalid\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";
/* XXX: should be a template */
static const char MESSED_UP_REQUEST_RESPONSE[] =
"HTTP/1.1 400 Malformed request after rewriting\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/1.1 503 Too many open connections\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/1.1 504 Connection timeout\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";
static const char CLIENT_BODY_PARSE_ERROR_RESPONSE[] =
"HTTP/1.1 400 Failed reading client body\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Failed parsing or buffering the chunk-encoded client body.\r\n";
static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
"HTTP/1.1 417 Expecting too much\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Privoxy detected an unsupported Expect header value.\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__)
/*********************************************************************
*
* Function : sig_handler
*
* Description : Signal handler for different signals.
* 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
*
* Returns : -
*
*********************************************************************/
static void sig_handler(int the_signal)
{
switch(the_signal)
{
case SIGTERM:
case SIGINT:
log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
#if defined(unix)
if (pidfile)
{
unlink(pidfile);
}
#endif /* unix */
exit(the_signal);
break;
case SIGHUP:
#if defined(unix)
received_hup_signal = 1;
#endif
break;
default:
/*
* We shouldn't be here, unless we catch signals
* in main() that we can't handle here!
*/
log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
}
return;
}
#endif
/*********************************************************************
*
* Function : get_write_delay
*
* Description : Parse the delay-response parameter.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
* Returns : Number of milliseconds to delay writes.
*
*********************************************************************/
static unsigned int get_write_delay(const struct client_state *csp)
{
unsigned int delay;
char *endptr;
char *newval;
if ((csp->action->flags & ACTION_DELAY_RESPONSE) == 0)
{
return 0;
}
newval = csp->action->string[ACTION_STRING_DELAY_RESPONSE];
delay = (unsigned)strtol(newval, &endptr, 0);
if (*endptr != '\0')
{
log_error(LOG_LEVEL_FATAL,
"Invalid delay-response{} parameter: '%s'", newval);
}
return delay;
}
/*********************************************************************
*
* Function : client_protocol_is_unsupported
*
* 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 : TRUE if an error response has been generated, or
* FALSE if the request doesn't look invalid.
*
*********************************************************************/
static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
{
/*
* 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").
*/
if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
{
const char *response = NULL;
const char *protocol = NULL;
if (!strncmpic(req, "GET ftp://", 10))
{
response = FTP_RESPONSE;
protocol = "FTP";
}
else
{
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_delayed(csp->cfd, response, strlen(response),
get_write_delay(csp));
return TRUE;
}
return FALSE;
}
/*********************************************************************
*
* Function : client_has_unsupported_expectations
*
* Description : Checks if the client used an unsupported expectation
* in which case an error message is delivered.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
* Returns : TRUE if an error response has been generated, or
* FALSE if the request doesn't look invalid.
*
*********************************************************************/
static int client_has_unsupported_expectations(const struct client_state *csp)
{
if ((csp->flags & CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION))
{
log_error(LOG_LEVEL_ERROR,
"Rejecting request from client %s with unsupported Expect header value",
csp->ip_addr_str);
log_error(LOG_LEVEL_CLF,
"%s - - [%T] \"%s\" 417 0", csp->ip_addr_str, csp->http->cmd);
write_socket_delayed(csp->cfd,
UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE),
get_write_delay(csp));
return TRUE;
}
return FALSE;
}
/*********************************************************************
*
* 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 (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
{
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);
write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
get_write_delay(csp));
destroy_list(headers);
return JB_ERR_PARSE;
}
else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
{
#ifndef FEATURE_EXTENDED_HOST_PATTERNS
/* Split the domain we just got for pattern matching */
init_domain_components(csp->http);
#endif
return JB_ERR_OK;
}
else
{
/* 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_delayed(csp->cfd, MISSING_DESTINATION_RESPONSE,
strlen(MISSING_DESTINATION_RESPONSE), get_write_delay(csp));
destroy_list(headers);
return JB_ERR_PARSE;
}
/*
* 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.
*/
}
/*********************************************************************
*
* 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 (header == NULL)
{
/*
* 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;
}
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;
}
/*********************************************************************
*
* 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;
assert(rsp != NULL);
if (rsp == NULL)
{
return "Internal error while searching for crunch reason";
}
switch (rsp->crunch_reason)
{
case UNSUPPORTED:
reason = "Unsupported HTTP feature";
break;
case BLOCKED:
reason = "Blocked";
break;
case UNTRUSTED:
reason = "Untrusted";
break;
case REDIRECTED:
reason = "Redirected";
break;
case CGI_CALL:
reason = "CGI Call";
break;
case NO_SUCH_DOMAIN:
reason = "DNS failure";
break;
case FORWARDING_FAILED:
reason = "Forwarding failed";
break;
case CONNECT_FAILED:
reason = "Connection failure";
break;
case OUT_OF_MEMORY:
reason = "Out of memory (may mask other reasons)";
break;
case CONNECTION_TIMEOUT:
reason = "Connection timeout";
break;
case NO_SERVER_DATA:
reason = "No server data received";
break;
default:
reason = "No reason recorded";
break;
}
return reason;
}
/*********************************************************************
*
* Function : log_applied_actions
*
* Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
* enabled.
*
* Parameters :
* 1 : actions = Current action spec to log
*
* Returns : Nothing.
*
*********************************************************************/
static void log_applied_actions(const struct current_action_spec *actions)
{
/*
* The conversion to text requires lots of memory allocations so
* we only do the conversion if the user is actually interested.
*/
if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
{
char *actions_as_text = actions_to_line_of_text(actions);
log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
freez(actions_as_text);
}
}
/*********************************************************************
*
* 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...)
* 2 : 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)
{
log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
}
/*
* Extract the status code from the actual head
* that will be 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';
/* Log that the request was crunched and why. */
log_applied_actions(csp->action);
log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
/* Write the answer to the client */
if (write_socket_delayed(csp->cfd, rsp->head, rsp->head_length, get_write_delay(csp))
|| write_socket_delayed(csp->cfd, rsp->body, rsp->content_length, get_write_delay(csp)))
{
/* There is nothing we can do about it. */
log_error(LOG_LEVEL_CONNECT,
"Couldn't deliver the error message for %s through client socket %d: %E",
http->url, csp->cfd);
}
/* Clean up and return */
if (cgi_error_memory() != rsp)
{
free_http_response(rsp);
}
return;
}
/*********************************************************************
*
* 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);
csp->flags |= CSP_FLAG_CRUNCHED;
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);
csp->flags |= CSP_FLAG_CRUNCHED;
#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_or_die("HTTP/1.0");
}
/*
* Rebuild the request line.
*/
freez(*request_line);
*request_line = strdup(http->gpc);
string_append(request_line, " ");
if (fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
{
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;