-const char parsers_rcs[] = "$Id: parsers.c,v 1.4 2001/05/22 18:46:04 oes Exp $";
+const char parsers_rcs[] = "$Id: parsers.c,v 1.55 2002/05/08 16:01:07 oes Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/parsers.c,v $
* `client_uagent', `client_x_forwarded',
* `client_x_forwarded_adder', `client_xtra_adder',
* `content_type', `crumble', `destroy_list', `enlist',
- * `flush_socket', `free_http_request', `get_header',
- * `list_to_text', `match', `parse_http_request', `sed',
+ * `flush_socket', ``get_header', `sed',
* and `server_set_cookie'.
*
* Copyright : Written by and Copyright (C) 2001 the SourceForge
- * IJBSWA team. http://ijbswa.sourceforge.net
+ * Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
- * by and Copyright (C) 1997 Anonymous Coders and
+ * by and Copyright (C) 1997 Anonymous Coders and
* Junkbusters Corporation. http://www.junkbusters.com
*
- * This program is free software; you can redistribute it
+ * 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
*
* Revisions :
* $Log: parsers.c,v $
+ * Revision 1.55 2002/05/08 16:01:07 oes
+ * Optimized add_to_iob:
+ * - Use realloc instead of malloc(), memcpy(), free()
+ * - Expand to powers of two if possible, to get
+ * O(log n) reallocs instead of O(n).
+ * - Moved check for buffer limit here from chat
+ * - Report failure via returncode
+ *
+ * Revision 1.54 2002/04/02 15:03:16 oes
+ * Tiny code cosmetics
+ *
+ * Revision 1.53 2002/03/26 22:29:55 swa
+ * we have a new homepage!
+ *
+ * Revision 1.52 2002/03/24 13:25:43 swa
+ * name change related issues
+ *
+ * Revision 1.51 2002/03/13 00:27:05 jongfoster
+ * Killing warnings
+ *
+ * Revision 1.50 2002/03/12 01:45:35 oes
+ * More verbose logging
+ *
+ * Revision 1.49 2002/03/09 20:03:52 jongfoster
+ * - Making various functions return int rather than size_t.
+ * (Undoing a recent change). Since size_t is unsigned on
+ * Windows, functions like read_socket that return -1 on
+ * error cannot return a size_t.
+ *
+ * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
+ * crashes, and also frequently caused JB to jump to 100%
+ * CPU and stay there. (Because it thought it had just
+ * read ((unsigned)-1) == 4Gb of data...)
+ *
+ * - The signature of write_socket has changed, it now simply
+ * returns success=0/failure=nonzero.
+ *
+ * - Trying to get rid of a few warnings --with-debug on
+ * Windows, I've introduced a new type "jb_socket". This is
+ * used for the socket file descriptors. On Windows, this
+ * is SOCKET (a typedef for unsigned). Everywhere else, it's
+ * an int. The error value can't be -1 any more, so it's
+ * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
+ * Windows it maps to the #define INVALID_SOCKET.)
+ *
+ * - The signature of bind_port has changed.
+ *
+ * Revision 1.48 2002/03/07 03:46:53 oes
+ * Fixed compiler warnings etc
+ *
+ * Revision 1.47 2002/02/20 23:15:13 jongfoster
+ * Parsing functions now handle out-of-memory gracefully by returning
+ * an error code.
+ *
+ * Revision 1.46 2002/01/17 21:03:47 jongfoster
+ * Moving all our URL and URL pattern parsing code to urlmatch.c.
+ *
+ * Revision 1.45 2002/01/09 14:33:03 oes
+ * Added support for localtime_r.
+ *
+ * Revision 1.44 2001/12/14 01:22:54 steudten
+ * Remove 'user:pass@' from 'proto://user:pass@host' for the
+ * new added header 'Host: ..'. (See Req ID 491818)
+ *
+ * Revision 1.43 2001/11/23 00:26:38 jongfoster
+ * Fixing two really stupid errors in my previous commit
+ *
+ * Revision 1.42 2001/11/22 21:59:30 jongfoster
+ * Adding code to handle +no-cookies-keep
+ *
+ * Revision 1.41 2001/11/05 23:43:05 steudten
+ * Add time+date to log files.
+ *
+ * Revision 1.40 2001/10/26 20:13:09 jongfoster
+ * ctype.h is needed in Windows, too.
+ *
+ * Revision 1.39 2001/10/26 17:40:04 oes
+ * Introduced get_header_value()
+ * Removed http->user_agent, csp->referrer and csp->accept_types
+ * Removed client_accept()
+ *
+ * Revision 1.38 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 1.37 2001/10/23 21:36:02 jongfoster
+ * Documenting sed()'s error behaviou (doc change only)
+ *
+ * Revision 1.36 2001/10/13 12:51:51 joergs
+ * Removed client_host, (was only required for the old 2.0.2-11 http://noijb.
+ * force-load), instead crumble Host: and add it (again) in client_host_adder
+ * (in case we get a HTTP/1.0 request without Host: header and forward it to
+ * a HTTP/1.1 server/proxy).
+ *
+ * Revision 1.35 2001/10/09 22:39:21 jongfoster
+ * assert.h is also required under Win32, so moving out of #ifndef _WIN32
+ * block.
+ *
+ * Revision 1.34 2001/10/07 18:50:55 oes
+ * Added server_content_encoding, renamed server_transfer_encoding
+ *
+ * Revision 1.33 2001/10/07 18:04:49 oes
+ * Changed server_http11 to server_http and its pattern to "HTTP".
+ * Additional functionality: it now saves the HTTP status into
+ * csp->http->status and sets CT_TABOO for Status 206 (partial range)
+ *
+ * Revision 1.32 2001/10/07 15:43:28 oes
+ * Removed FEATURE_DENY_GZIP and replaced it with client_accept_encoding,
+ * client_te and client_accept_encoding_adder, triggered by the new
+ * +no-compression action. For HTTP/1.1 the Accept-Encoding header is
+ * changed to allow only identity and chunked, and the TE header is
+ * crunched. For HTTP/1.0, Accept-Encoding is crunched.
+ *
+ * parse_http_request no longer does anything than parsing. The rewriting
+ * of http->cmd and version mangling are gone. It now also recognizes
+ * the put and delete methods and saves the url in http->url. Removed
+ * unused variable.
+ *
+ * renamed content_type and content_length to have the server_ prefix
+ *
+ * server_content_type now only works if csp->content_type != CT_TABOO
+ *
+ * added server_transfer_encoding, which
+ * - Sets CT_TABOO to prohibit filtering if encoding compresses
+ * - Raises the CSP_FLAG_CHUNKED flag if Encoding is "chunked"
+ * - Change from "chunked" to "identity" if body was chunked
+ * but has been de-chunked for filtering.
+ *
+ * added server_content_md5 which crunches any Content-MD5 headers
+ * if the body was modified.
+ *
+ * made server_http11 conditional on +downgrade action
+ *
+ * Replaced 6 boolean members of csp with one bitmap (csp->flags)
+ *
+ * Revision 1.31 2001/10/05 14:25:02 oes
+ * Crumble Keep-Alive from Server
+ *
+ * Revision 1.30 2001/09/29 12:56:03 joergs
+ * IJB now changes HTTP/1.1 to HTTP/1.0 in requests and answers.
+ *
+ * Revision 1.29 2001/09/24 21:09:24 jongfoster
+ * Fixing 2 memory leaks that Guy spotted, where the paramater to
+ * enlist() was not being free()d.
+ *
+ * Revision 1.28 2001/09/22 16:32:28 jongfoster
+ * Removing unused #includes.
+ *
+ * Revision 1.27 2001/09/20 15:45:25 steudten
+ *
+ * add casting from size_t to int for printf()
+ * remove local variable shadow s2
+ *
+ * Revision 1.26 2001/09/16 17:05:14 jongfoster
+ * Removing unused #include showarg.h
+ *
+ * Revision 1.25 2001/09/16 13:21:27 jongfoster
+ * Changes to use new list functions.
+ *
+ * Revision 1.24 2001/09/13 23:05:50 jongfoster
+ * Changing the string paramater to the header parsers a "const".
+ *
+ * Revision 1.23 2001/09/12 18:08:19 steudten
+ *
+ * In parse_http_request() header rewriting miss the host value, so
+ * from http://www.mydomain.com the result was just " / " not
+ * http://www.mydomain.com/ in case we forward.
+ *
+ * Revision 1.22 2001/09/10 10:58:53 oes
+ * Silenced compiler warnings
+ *
+ * Revision 1.21 2001/07/31 14:46:00 oes
+ * - Persistant connections now suppressed
+ * - sed() no longer appends empty header to csp->headers
+ *
+ * Revision 1.20 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 1.19 2001/07/25 17:21:54 oes
+ * client_uagent now saves copy of User-Agent: header value
+ *
+ * Revision 1.18 2001/07/13 14:02:46 oes
+ * - Included fix to repair broken HTTP requests that
+ * don't contain a path, not even '/'.
+ * - Removed all #ifdef PCRS
+ * - content_type now always inspected and classified as
+ * text, gif or other.
+ * - formatting / comments
+ *
+ * Revision 1.17 2001/06/29 21:45:41 oes
+ * Indentation, CRLF->LF, Tab-> Space
+ *
+ * Revision 1.16 2001/06/29 13:32:42 oes
+ * - Fixed a comment
+ * - Adapted free_http_request
+ * - Removed logentry from cancelled commit
+ *
+ * Revision 1.15 2001/06/03 19:12:38 oes
+ * deleted const struct interceptors
+ *
+ * Revision 1.14 2001/06/01 18:49:17 jongfoster
+ * Replaced "list_share" with "list" - the tiny memory gain was not
+ * worth the extra complexity.
+ *
+ * Revision 1.13 2001/05/31 21:30:33 jongfoster
+ * Removed list code - it's now in list.[ch]
+ * Renamed "permission" to "action", and changed many features
+ * to use the actions file rather than the global config.
+ *
+ * Revision 1.12 2001/05/31 17:33:13 oes
+ *
+ * CRLF -> LF
+ *
+ * Revision 1.11 2001/05/29 20:11:19 joergs
+ * '/ * inside comment' warning removed.
+ *
+ * Revision 1.10 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 1.9 2001/05/28 17:26:33 jongfoster
+ * Fixing segfault if last header was crunched.
+ * Fixing Windows build (snprintf() is _snprintf() under Win32, but we
+ * can use the cross-platform sprintf() instead.)
+ *
+ * Revision 1.8 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 1.7 2001/05/27 13:19:06 oes
+ * Patched Joergs solution for the content-length in.
+ *
+ * Revision 1.6 2001/05/26 13:39:32 jongfoster
+ * Only crunches Content-Length header if applying RE filtering.
+ * Without this fix, Microsoft Windows Update wouldn't work.
+ *
+ * Revision 1.5 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 1.4 2001/05/22 18:46:04 oes
*
* - Enabled filtering banners by size rather than URL
#include "config.h"
+#ifndef _WIN32
#include <stdio.h>
#include <sys/types.h>
+#endif
+
#include <stdlib.h>
#include <ctype.h>
+#include <assert.h>
#include <string.h>
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(__OS2__)
#include <unistd.h>
#endif
#include "project.h"
+#include "list.h"
#include "parsers.h"
#include "encode.h"
-#include "filters.h"
-#include "loaders.h"
-#include "showargs.h"
-#include "jcc.h"
#include "ssplit.h"
#include "errlog.h"
#include "jbsockets.h"
#include "miscutil.h"
+#include "list.h"
const char parsers_h_rcs[] = PARSERS_H_VERSION;
* as an array index. Therefore we need to make sure that high-bit
* characters generate +ve values, and ideally we also want to make
* the argument match the declared parameter type of "int".
- *
- * Why did they write a character function that can't take a simple
+ *
+ * Why did they write a character function that can't take a simple
* "char" argument? Doh!
*/
#define ijb_isupper(__X) isupper((int)(unsigned char)(__X))
{ "from:", 5, client_from },
{ "cookie:", 7, client_send_cookie },
{ "x-forwarded-for:", 16, client_x_forwarded },
- { "proxy-connection:", 17, crumble },
-#ifdef DENY_GZIP
- { "Accept-Encoding: gzip", 21, crumble },
-#endif /* def DENY_GZIP */
-#if defined(DETECT_MSIE_IMAGES)
- { "Accept:", 7, client_accept },
-#endif /* defined(DETECT_MSIE_IMAGES) */
-#ifdef FORCE_LOAD
- { "Host:", 5, client_host },
-#endif /* def FORCE_LOAD */
+ { "Accept-Encoding:", 16, client_accept_encoding },
+ { "TE:", 3, client_te },
+ { "Host:", 5, crumble },
/* { "if-modified-since:", 18, crumble }, */
+ { "Keep-Alive:", 11, crumble },
+ { "connection:", 11, crumble },
+ { "proxy-connection:", 17, crumble },
{ NULL, 0, NULL }
};
-const struct interceptors intercept_patterns[] = {
- { "show-proxy-args", 14, show_proxy_args },
- { "ijb-send-banner", 14, ijb_send_banner },
-#ifdef TRUST_FILES
- { "ij-untrusted-url", 15, ij_untrusted_url },
-#endif /* def TRUST_FILES */
- { NULL, 0, NULL }
-};
const struct parsers server_patterns[] = {
+ { "HTTP", 4, server_http },
{ "set-cookie:", 11, server_set_cookie },
{ "connection:", 11, crumble },
-#if defined(PCRS) || defined(KILLPOPUPS)
- { "Content-Type:", 13, content_type },
- { "Content-Length:", 15, crumble },
-#endif /* defined(PCRS) || defined(KILLPOPUPS) */
+ { "Content-Type:", 13, server_content_type },
+ { "Content-Length:", 15, server_content_length },
+ { "Content-MD5:", 12, server_content_md5 },
+ { "Content-Encoding:", 17, server_content_encoding },
+ { "Transfer-Encoding:", 18, server_transfer_coding },
+ { "Keep-Alive:", 11, crumble },
{ NULL, 0, NULL }
};
-void (* const add_client_headers[])(struct client_state *) = {
+const add_header_func_ptr add_client_headers[] = {
+ client_host_adder,
client_cookie_adder,
client_x_forwarded_adder,
client_xtra_adder,
+ client_accept_encoding_adder,
+ connection_close_adder,
NULL
};
-void (* const add_server_headers[])(struct client_state *) = {
+const add_header_func_ptr add_server_headers[] = {
+ connection_close_adder,
NULL
};
-/*********************************************************************
- *
- * Function : match
- *
- * Description : Do a `strncmpic' on every pattern in pats.
- *
- * Parameters :
- * 1 : buf = a string to match to a list of patterns
- * 2 : pats = list of strings to compare against buf.
- *
- * Returns : Return the matching "struct parsers *",
- * or NULL if no pattern matches.
- *
- *********************************************************************/
-static const struct parsers *match(char *buf, const struct parsers *pats)
-{
- const struct parsers *v;
-
- if (buf == NULL)
- {
- /* hit me */
- log_error(LOG_LEVEL_ERROR, "NULL parameter to match()");
- return(NULL);
- }
-
- for (v = pats; v->str ; v++)
- {
- if (strncmpic(buf, v->str, v->len) == 0)
- {
- return(v);
- }
- }
- return(NULL);
-
-}
-
-
/*********************************************************************
*
* Function : flush_socket
* file, the results are not portable.
*
*********************************************************************/
-int flush_socket(int fd, struct client_state *csp)
+int flush_socket(jb_socket fd, struct client_state *csp)
{
struct iob *iob = csp->iob;
- int n = iob->eod - iob->cur;
+ int len = iob->eod - iob->cur;
- if (n <= 0)
+ if (len <= 0)
{
return(0);
}
- n = write_socket(fd, iob->cur, n);
+ if (write_socket(fd, iob->cur, (size_t)len))
+ {
+ return(-1);
+ }
iob->eod = iob->cur = iob->buf;
- return(n);
+ return(len);
}
*
* Function : add_to_iob
*
- * Description : Add content to the buffered page.
+ * Description : Add content to the buffered page, expanding the
+ * buffer if necessary.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
* 2 : buf = holds the content to be added to the page
* 3 : n = number of bytes to be added
*
- * Returns : Number of bytes in the content buffer.
+ * Returns : JB_ERR_OK on success, JB_ERR_MEMORY if out-of-memory
+ * or buffer limit reached.
*
*********************************************************************/
-int add_to_iob(struct client_state *csp, char *buf, int n)
+jb_err add_to_iob(struct client_state *csp, char *buf, int n)
{
struct iob *iob = csp->iob;
- int have, need;
+ size_t used, offset, need, want;
char *p;
- have = iob->eod - iob->cur;
+ if (n <= 0) return JB_ERR_OK;
- if (n <= 0)
- {
- return(have);
- }
+ used = iob->eod - iob->buf;
+ offset = iob->cur - iob->buf;
+ need = used + n + 1;
- need = have + n;
-
- if ((p = (char *)malloc(need + 1)) == NULL)
+ /*
+ * If the buffer can't hold the new data, extend it first.
+ * Use the next power of two if possible, else use the actual need.
+ */
+ if (need > csp->config->buffer_limit)
{
- log_error(LOG_LEVEL_ERROR, "malloc() iob failed: %E");
- return(-1);
+ log_error(LOG_LEVEL_ERROR, "Buffer limit reached while extending the buffer (iob)");
+ return JB_ERR_MEMORY;
}
- if (have)
+ if (need > iob->size)
{
- /* there is something in the buffer - save it */
- memcpy(p, iob->cur, have);
-
- /* replace the buffer with the new space */
- freez(iob->buf);
- iob->buf = p;
+ for (want = csp->iob->size ? csp->iob->size : 512; want <= need;) want *= 2;
+
+ if (want <= csp->config->buffer_limit && NULL != (p = (char *)realloc(iob->buf, want)))
+ {
+ iob->size = want;
+ }
+ else if (NULL != (p = (char *)realloc(iob->buf, need)))
+ {
+ iob->size = need;
+ }
+ else
+ {
+ log_error(LOG_LEVEL_ERROR, "Extending the buffer (iob) failed: %E");
+ return JB_ERR_MEMORY;
+ }
- /* point to the end of the data */
- p += have;
- }
- else
- {
- /* the buffer is empty, free it and reinitialize */
- freez(iob->buf);
+ /* Update the iob pointers */
+ iob->cur = p + offset;
+ iob->eod = p + used;
iob->buf = p;
}
/* copy the new data into the iob buffer */
- memcpy(p, buf, n);
+ memcpy(iob->eod, buf, (size_t)n);
/* point to the end of the data */
- p += n;
+ iob->eod += n;
/* null terminate == cheap insurance */
- *p = '\0';
-
- /* set the pointers to the new values */
- iob->cur = iob->buf;
- iob->eod = p;
+ *iob->eod = '\0';
- return(need);
+ return JB_ERR_OK;
}
*p = '\0';
ret = strdup(iob->cur);
+ if (ret == NULL)
+ {
+ /* FIXME No way to handle error properly */
+ log_error(LOG_LEVEL_FATAL, "Out of memory in get_header()");
+ }
iob->cur = p+1;
- if ((q = strchr(ret, '\r'))) *q = '\0';
+ if ((q = strchr(ret, '\r')) != NULL) *q = '\0';
- /* is this a blank linke (i.e. the end of the header) ? */
+ /* is this a blank line (i.e. the end of the header) ? */
if (*ret == '\0')
{
freez(ret);
/*********************************************************************
*
- * Function : enlist
+ * Function : get_header_value
*
- * Description : Append a string into a specified string list.
+ * Description : Get the value of a given header from a chained list
+ * of header lines or return NULL if no such header is
+ * present in the list.
*
* Parameters :
- * 1 : h = pointer to list 'dummy' header
- * 2 : s = string to add to the list
+ * 1 : header_list = pointer to list
+ * 2 : header_name = string with name of header to look for.
+ * Trailing colon required, capitalization
+ * doesn't matter.
*
- * Returns : N/A
+ * Returns : NULL if not found, else value of header
*
*********************************************************************/
-void enlist(struct list *h, const char *s)
+char *get_header_value(const struct list *header_list, const char *header_name)
{
- struct list *n = (struct list *)malloc(sizeof(*n));
- struct list *l;
-
- if (n)
- {
- n->str = strdup(s);
- n->next = NULL;
-
- if ((l = h->last))
- {
- l->next = n;
- }
- else
- {
- h->next = n;
- }
-
- h->last = n;
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : destroy_list
- *
- * Description : Destroy a string list (opposite of enlist)
- *
- * Parameters :
- * 1 : h = pointer to list 'dummy' header
- *
- * Returns : N/A
- *
- *********************************************************************/
-void destroy_list(struct list *h)
-{
- struct list *p, *n;
-
- for (p = h->next; p ; p = n)
- {
- n = p->next;
- freez(p->str);
- freez(p);
- }
-
- memset(h, '\0', sizeof(*h));
-
-}
-
-
-/*********************************************************************
- *
- * Function : list_to_text
- *
- * Description : "Flaten" a string list into 1 long \r\n delimited string.
- *
- * Parameters :
- * 1 : h = pointer to list 'dummy' header
- *
- * Returns : NULL on malloc error, else new long string.
- *
- *********************************************************************/
-static char *list_to_text(struct list *h)
-{
- struct list *p;
+ struct list_entry *cur_entry;
char *ret = NULL;
- char *s;
- int size;
+ size_t length = 0;
- size = 0;
+ assert(header_list);
+ assert(header_name);
+ length = strlen(header_name);
- for (p = h->next; p ; p = p->next)
+ for (cur_entry = header_list->first; cur_entry ; cur_entry = cur_entry->next)
{
- if (p->str)
+ if (cur_entry->str)
{
- size += strlen(p->str) + 2;
- }
- }
-
- if ((ret = (char *)malloc(size + 1)) == NULL)
- {
- return(NULL);
- }
-
- ret[size] = '\0';
-
- s = ret;
-
- for (p = h->next; p ; p = p->next)
- {
- if (p->str)
- {
- strcpy(s, p->str);
- s += strlen(s);
- *s++ = '\r'; *s++ = '\n';
+ if (!strncmpic(cur_entry->str, header_name, length))
+ {
+ /*
+ * Found: return pointer to start of value
+ */
+ ret = (char *) (cur_entry->str + length);
+ while (*ret && ijb_isspace(*ret)) ret++;
+ return(ret);
+ }
}
}
- return(ret);
+ /*
+ * Not found
+ */
+ return NULL;
}
-
/*********************************************************************
*
* Function : sed
* headers (client or server)
* 3 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : Single pointer to a fully formed header.
+ * Returns : Single pointer to a fully formed header, or NULL
+ * on out-of-memory error.
*
*********************************************************************/
-char *sed(const struct parsers pats[], void (* const more_headers[])(struct client_state *), struct client_state *csp)
+char *sed(const struct parsers pats[],
+ const add_header_func_ptr more_headers[],
+ struct client_state *csp)
{
- struct list *p;
+ struct list_entry *p;
const struct parsers *v;
- char *hdr;
- void (* const *f)();
+ const add_header_func_ptr *f;
+ jb_err err = JB_ERR_OK;
- for (p = csp->headers->next; p ; p = p->next)
+ for (v = pats; (err == JB_ERR_OK) && (v->str != NULL) ; v++)
{
- log_error(LOG_LEVEL_HEADER, "scan: %s", p->str);
-
- if ((v = match(p->str, pats)))
+ for (p = csp->headers->first; (err == JB_ERR_OK) && (p != NULL) ; p = p->next)
{
- hdr = v->parser(v, p->str, csp);
- freez(p->str);
- p->str = hdr;
- }
+ /* Header crunch()ed in previous run? -> ignore */
+ if (p->str == NULL) continue;
+
+ if (v == pats) log_error(LOG_LEVEL_HEADER, "scan: %s", p->str);
+ if (strncmpic(p->str, v->str, v->len) == 0)
+ {
+ err = v->parser(csp, (char **)&(p->str));
+ }
+ }
}
/* place any additional headers on the csp->headers list */
- for (f = more_headers; *f ; f++)
+ for (f = more_headers; (err == JB_ERR_OK) && (*f) ; f++)
{
- (*f)(csp);
+ err = (*f)(csp);
}
- /* add the blank line at the end of the header */
- enlist(csp->headers, "");
+ if (err != JB_ERR_OK)
+ {
+ return NULL;
+ }
- hdr = list_to_text(csp->headers);
+ return list_to_text(csp->headers);
+}
- return(hdr);
-}
+/* here begins the family of parser functions that reformat header lines */
/*********************************************************************
*
- * Function : free_http_request
+ * Function : crumble
*
- * Description : Freez a http_request structure
+ * Description : This is called if a header matches a pattern to "crunch"
*
* Parameters :
- * 1 : http = points to a http_request structure to free
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : N/A
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-void free_http_request(struct http_request *http)
+jb_err crumble(struct client_state *csp, char **header)
{
- freez(http->cmd);
- freez(http->gpc);
- freez(http->host);
- freez(http->hostport);
- freez(http->path);
- freez(http->ver);
-
+ log_error(LOG_LEVEL_HEADER, "crunch!");
+ freez(*header);
+ return JB_ERR_OK;
}
/*********************************************************************
*
- * Function : parse_http_request
+ * Function : server_content_type
*
- * Description : Parse out the host and port from the URL. Find the
- * hostname & path, port (if ':'), and/or password (if '@')
+ * Description : Set the content-type for filterable types (text/.*,
+ * javascript and image/gif) unless filtering has been
+ * forbidden (CT_TABOO) while parsing earlier headers.
*
* Parameters :
- * 1 : req = URL (or is it URI?) to break down
- * 2 : http = pointer to the http structure to hold elements
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : N/A
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-void parse_http_request(char *req, struct http_request *http, struct client_state *csp)
+jb_err server_content_type(struct client_state *csp, char **header)
{
- char *buf, *v[10], *url, *p;
- int n;
-
- memset(http, '\0', sizeof(*http));
-
- http->cmd = strdup(req);
-
- buf = strdup(req);
-
- n = ssplit(buf, " \r\n", v, SZ(v), 1, 1);
-
- if (n == 3)
+ if (csp->content_type != CT_TABOO)
{
- /* this could be a CONNECT request */
- if (strcmpic(v[0], "connect") == 0)
- {
- http->ssl = 1;
- http->gpc = strdup(v[0]);
- http->hostport = strdup(v[1]);
- http->ver = strdup(v[2]);
- }
-
-#ifdef WEBDAV
-
-/* This next line is a little ugly, but it simplifies the if statement below. */
-/* Basically if using webDAV, we want the OR condition to use these too. */
-
-/*
- * by haroon
- * These are the headers as defined in RFC2518 to add webDAV support
- */
+ if (strstr(*header, " text/")
+ || strstr(*header, "application/x-javascript"))
+ csp->content_type = CT_TEXT;
+ else if (strstr(*header, " image/gif"))
+ csp->content_type = CT_GIF;
+ else
+ csp->content_type = 0;
+ }
-#define OR_WEBDAV || \
- (0 == strcmpic(v[0], "propfind")) || \
- (0 == strcmpic(v[0], "proppatch")) || \
- (0 == strcmpic(v[0], "move")) || \
- (0 == strcmpic(v[0], "copy")) || \
- (0 == strcmpic(v[0], "mkcol")) || \
- (0 == strcmpic(v[0], "lock")) || \
- (0 == strcmpic(v[0], "unlock"))
+ return JB_ERR_OK;
+}
-#else /* No webDAV support is enabled. Provide an empty OR_WEBDAV macro. */
-#define OR_WEBDAV
+/*********************************************************************
+ *
+ * Function : server_transfer_coding
+ *
+ * Description : - Prohibit filtering (CT_TABOO) if transfer coding compresses
+ * - Raise the CSP_FLAG_CHUNKED flag if coding is "chunked"
+ * - Change from "chunked" to "identity" if body was chunked
+ * but has been de-chunked for filtering.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
+ *
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
+ *
+ *********************************************************************/
+jb_err server_transfer_coding(struct client_state *csp, char **header)
+{
+ /*
+ * Turn off pcrs and gif filtering if body compressed
+ */
+ if (strstr(*header, "gzip") || strstr(*header, "compress") || strstr(*header, "deflate"))
+ {
+ csp->content_type = CT_TABOO;
+ }
-#endif
+ /*
+ * Raise flag if body chunked
+ */
+ if (strstr(*header, "chunked"))
+ {
+ csp->flags |= CSP_FLAG_CHUNKED;
- /* or it could be a GET or a POST (possibly webDAV too) */
- if ((strcmpic(v[0], "get") == 0) ||
- (strcmpic(v[0], "head") == 0) OR_WEBDAV ||
- (strcmpic(v[0], "post") == 0))
+ /*
+ * If the body was modified, it has been
+ * de-chunked first, so adjust the header:
+ */
+ if (csp->flags & CSP_FLAG_MODIFIED)
{
- http->ssl = 0;
- http->gpc = strdup(v[0]);
- url = v[1];
- http->ver = strdup(v[2]);
-
- if (strncmpic(url, "http://", 7) == 0)
- {
- url += 7;
- }
- else if (strncmpic(url, "https://", 8) == 0)
- {
- url += 8;
- }
- else
- {
- url = NULL;
- }
-
- if (url && (p = strchr(url, '/')))
- {
- http->path = strdup(p);
- *p = '\0';
- http->hostport = strdup(url);
- }
+ freez(*header);
+ *header = strdup("Transfer-Encoding: identity");
+ return (header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK;
}
}
- freez(buf);
+ return JB_ERR_OK;
+}
- if (http->hostport == NULL)
+/*********************************************************************
+ *
+ * Function : server_content_encoding
+ *
+ * Description : Prohibit filtering (CT_TABOO) if content encoding compresses
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
+ *
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
+ *
+ *********************************************************************/
+jb_err server_content_encoding(struct client_state *csp, char **header)
+{
+ /*
+ * Turn off pcrs and gif filtering if body compressed
+ */
+ if (strstr(*header, "gzip") || strstr(*header, "compress") || strstr(*header, "deflate"))
{
- free_http_request(http);
- return;
+ csp->content_type = CT_TABOO;
}
- buf = strdup(http->hostport);
-
+ return JB_ERR_OK;
- /* check if url contains password */
- n = ssplit(buf, "@", v, SZ(v), 1, 1);
- if (n == 2)
- {
- char * newbuf = NULL;
- newbuf = strdup(v[1]);
- freez(buf);
- buf = newbuf;
- }
+}
- n = ssplit(buf, ":", v, SZ(v), 1, 1);
- if (n == 1)
+/*********************************************************************
+ *
+ * Function : server_content_length
+ *
+ * Description : Adjust Content-Length header if we modified
+ * the body.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
+ *
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
+ *
+ *********************************************************************/
+jb_err server_content_length(struct client_state *csp, char **header)
+{
+ if (csp->content_length != 0) /* Content length has been modified */
{
- http->host = strdup(v[0]);
- http->port = 80;
- }
+ freez(*header);
+ *header = (char *) zalloc(100);
+ if (*header == NULL)
+ {
+ return JB_ERR_MEMORY;
+ }
- if (n == 2)
- {
- http->host = strdup(v[0]);
- http->port = atoi(v[1]);
+ sprintf(*header, "Content-Length: %d", (int) csp->content_length);
+
+ log_error(LOG_LEVEL_HEADER, "Adjust Content-Length to %d", (int) csp->content_length);
}
- freez(buf);
+ return JB_ERR_OK;
+}
- if (http->host == NULL)
- {
- free_http_request(http);
- }
- if (http->path == NULL)
+/*********************************************************************
+ *
+ * Function : server_content_md5
+ *
+ * Description : Crumble any Content-MD5 headers if the document was
+ * modified. FIXME: Should we re-compute instead?
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
+ *
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
+ *
+ *********************************************************************/
+jb_err server_content_md5(struct client_state *csp, char **header)
+{
+ if (csp->flags & CSP_FLAG_MODIFIED)
{
- http->path = strdup("");
+ log_error(LOG_LEVEL_HEADER, "Crunching Content-MD5");
+ freez(*header);
}
+ return JB_ERR_OK;
}
-/* here begins the family of parser functions that reformat header lines */
-
-
/*********************************************************************
*
- * Function : crumble
+ * Function : client_accept_encoding
*
- * Description : This is called if a header matches a pattern to "crunch"
+ * Description : Rewrite the client's Accept-Encoding header so that
+ * if doesn't allow compression, if the action applies.
+ * Note: For HTTP/1.0 the absence of the header is enough.
*
* Parameters :
- * 1 : v = Pointer to parsers structure, which basically holds
- * headers (client or server) that we want to "crunch"
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : Always NULL.
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *crumble(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_accept_encoding(struct client_state *csp, char **header)
{
- log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
+ if ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
+ {
+ log_error(LOG_LEVEL_HEADER, "Supressed offer to compress content");
-}
+ freez(*header);
+ if (!strcmpic(csp->http->ver, "HTTP/1.1"))
+ {
+ *header = strdup("Accept-Encoding: identity;q=1.0, *;q=0");
+ if (*header == NULL)
+ {
+ return JB_ERR_MEMORY;
+ }
+ }
+ }
+ return JB_ERR_OK;
+}
-#if defined(PCRS) || defined(KILLPOPUPS)
/*********************************************************************
*
- * Function : content_type
+ * Function : client_te
*
- * Description : Is this a text/* or javascript MIME Type?
+ * Description : Rewrite the client's TE header so that
+ * if doesn't allow compression, if the action applies.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header string we are "considering"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : A duplicate string pointer to this header (ie. pass thru)
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *content_type(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_te(struct client_state *csp, char **header)
{
- if (strstr (s, " text/") || strstr (s, "application/x-javascript"))
- csp->is_text = 1;
- else
- csp->is_text = 0;
-
- return(strdup(s));
+ if ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
+ {
+ freez(*header);
+ log_error(LOG_LEVEL_HEADER, "Supressed offer to compress transfer");
+ }
+ return JB_ERR_OK;
}
-#endif /* defined(PCRS) || defined(KILLPOPUPS) */
-
-
/*********************************************************************
*
* Function : client_referrer
* Called from `sed'.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : NULL if crunched, or a malloc'ed string with the original
- * or modified header
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_referrer(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_referrer(struct client_state *csp, char **header)
{
-#ifdef FORCE_LOAD
+ const char *newval;
+
+#ifdef FEATURE_FORCE_LOAD
/* Since the referrer can include the prefix even
* even if the request itself is non-forced, we must
- * clean it unconditionally
+ * clean it unconditionally
*/
- strclean(s, FORCE_PREFIX);
-#endif /* def FORCE_LOAD */
-
- csp->referrer = strdup(s);
+ strclean(*header, FORCE_PREFIX);
+#endif /* def FEATURE_FORCE_LOAD */
- if (csp->config->referrer == NULL)
+ /*
+ * Are we sending referer?
+ */
+ if ((csp->action->flags & ACTION_HIDE_REFERER) == 0)
{
- log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
+ return JB_ERR_OK;
}
- if (*csp->config->referrer == '.')
- {
- return(strdup(s));
- }
+ freez(*header);
- if (*csp->config->referrer == '@')
+ newval = csp->action->string[ACTION_STRING_REFERER];
+
+ if ((newval == NULL) || (0 == strcmpic(newval, "block")) )
{
- if (csp->permissions & PERMIT_COOKIE_READ)
- {
- return(strdup(s));
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
- }
+ /*
+ * Blocking referer
+ */
+ log_error(LOG_LEVEL_HEADER, "crunch!");
+ return JB_ERR_OK;
}
+ else if (0 == strncmpic(newval, "http://", 7))
+ {
+ /*
+ * We have a specific (fixed) referer we want to send.
+ */
+ log_error(LOG_LEVEL_HEADER, "modified");
- /*
- * New option § or L: Forge a referer as http://[hostname:port of REQUEST]/
- * to fool stupid checks for in-site links
- */
+ *header = strdup("Referer: ");
+ string_append(header, newval);
- if (*csp->config->referrer == '§' || *csp->config->referrer == 'L')
+ return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK;
+ }
+ else
{
- if (csp->permissions & PERMIT_COOKIE_READ)
- {
- return(strdup(s));
- }
- else
+ /*
+ * Forge a referer as http://[hostname:port of REQUEST]/
+ * to fool stupid checks for in-site links
+ */
+ if (0 != strcmpic(newval, "forge"))
{
- log_error(LOG_LEVEL_HEADER, "crunch+forge!");
- s = strsav(NULL, "Referer: ");
- s = strsav(s, "http://");
- s = strsav(s, csp->http->hostport);
- s = strsav(s, "/");
- return(s);
+ /*
+ * Invalid choice - but forge is probably the best default.
+ */
+ log_error(LOG_LEVEL_ERROR, "Bad parameter: +referer{%s}", newval);
}
- }
-
- log_error(LOG_LEVEL_HEADER, "modified");
-
- s = strsav( NULL, "Referer: " );
- s = strsav( s, csp->config->referrer );
- return(s);
+ *header = strdup("Referer: http://");
+ string_append(header, csp->http->hostport);
+ string_append(header, "/");
+ log_error(LOG_LEVEL_HEADER, "crunch+forge to %s", *header);
+
+ return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK;
+ }
}
*
* Function : client_uagent
*
- * Description : Handle the "user-agent" config setting properly.
- * Called from `sed'.
+ * Description : Handle the "user-agent" config setting properly
+ * and remember its original value to enable browser
+ * bug workarounds. Called from `sed'.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : A malloc'ed pointer to the default agent, or
- * a malloc'ed string pointer to this header (ie. pass thru).
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_uagent(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_uagent(struct client_state *csp, char **header)
{
-#ifdef DETECT_MSIE_IMAGES
- if (strstr (s, "MSIE "))
- {
- /* This is Microsoft Internet Explorer.
- * Enable auto-detect.
- */
- csp->accept_types |= ACCEPT_TYPE_IS_MSIE;
- }
-#endif /* def DETECT_MSIE_IMAGES */
+ const char *newval;
- if (csp->config->uagent == NULL)
+ if ((csp->action->flags & ACTION_HIDE_USER_AGENT) == 0)
{
- log_error(LOG_LEVEL_HEADER, "default");
- return(strdup(DEFAULT_USER_AGENT));
+ return JB_ERR_OK;
}
- if (*csp->config->uagent == '.')
+ newval = csp->action->string[ACTION_STRING_USER_AGENT];
+ if (newval == NULL)
{
- return(strdup(s));
- }
-
- if (*csp->config->uagent == '@')
- {
- if (csp->permissions & PERMIT_COOKIE_READ)
- {
- return(strdup(s));
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "default");
- return(strdup(DEFAULT_USER_AGENT));
- }
+ return JB_ERR_OK;
}
log_error(LOG_LEVEL_HEADER, "modified");
- s = strsav( NULL, "User-Agent: " );
- s = strsav( s, csp->config->uagent );
- return(s);
+ freez(*header);
+ *header = strdup("User-Agent: ");
+ string_append(header, newval);
+ return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK;
}
* Description : Handle "ua-" headers properly. Called from `sed'.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : NULL if crunched, or a malloc'ed string to original header
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_ua(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_ua(struct client_state *csp, char **header)
{
- if (csp->config->uagent == NULL)
+ if ((csp->action->flags & ACTION_HIDE_USER_AGENT) != 0)
{
log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
- }
-
- if (*csp->config->uagent == '.')
- {
- return(strdup(s));
+ freez(*header);
}
- if (*csp->config->uagent == '@')
- {
- if (csp->permissions & PERMIT_COOKIE_READ)
- {
- return(strdup(s));
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
- }
- }
-
- log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
-
+ return JB_ERR_OK;
}
* Called from `sed'.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : NULL if crunched, or a malloc'ed string to
- * modified/original header.
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_from(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_from(struct client_state *csp, char **header)
{
- /* if not set, zap it */
- if (csp->config->from == NULL)
+ const char *newval;
+
+ if ((csp->action->flags & ACTION_HIDE_FROM) == 0)
{
- log_error(LOG_LEVEL_HEADER, "crunch!");
- return(NULL);
+ return JB_ERR_OK;
}
- if (*csp->config->from == '.')
+ freez(*header);
+
+ newval = csp->action->string[ACTION_STRING_FROM];
+
+ /*
+ * Are we blocking the e-mail address?
+ */
+ if ((newval == NULL) || (0 == strcmpic(newval, "block")) )
{
- return(strdup(s));
+ log_error(LOG_LEVEL_HEADER, "crunch!");
+ return JB_ERR_OK;
}
log_error(LOG_LEVEL_HEADER, " modified");
- s = strsav( NULL, "From: " );
- s = strsav( s, csp->config->from );
- return(s);
+ *header = strdup("From: ");
+ string_append(header, newval);
+ return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK;
}
* else we crunch it. Mmmmmmmmmmm ... cookie ......
*
* Parameters :
- * 1 : v = pattern of cookie `sed' found matching
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : Always NULL.
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_send_cookie(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_send_cookie(struct client_state *csp, char **header)
{
- if (csp->permissions & PERMIT_COOKIE_READ)
+ jb_err result = JB_ERR_OK;
+
+ if ((csp->action->flags & ACTION_NO_COOKIE_READ) == 0)
{
- enlist(csp->cookie_list, s + v->len + 1);
+ /* strlen("cookie: ") == 8 */
+ result = enlist(csp->cookie_list, *header + 8);
}
else
{
}
/*
- * Always return NULL here. The cookie header
+ * Always remove the cookie here. The cookie header
* will be sent at the end of the header.
*/
- return(NULL);
+ freez(*header);
+ return result;
}
* also used in the add_client_headers list. Called from `sed'.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header (from sed) to "crunch"
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : Always NULL.
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_x_forwarded(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_x_forwarded(struct client_state *csp, char **header)
{
- if (csp->config->add_forwarded)
+ if ((csp->action->flags & ACTION_HIDE_FORWARDED) == 0)
{
- csp->x_forwarded = strdup(s);
- }
-
- /*
- * Always return NULL, since this information
- * will be sent at the end of the header.
- */
+ /* Save it so we can re-add it later */
+ freez(csp->x_forwarded);
+ csp->x_forwarded = *header;
- return(NULL);
+ /*
+ * Always set *header = NULL, since this information
+ * will be sent at the end of the header.
+ */
+ *header = NULL;
+ }
+ else
+ {
+ freez(*header);
+ log_error(LOG_LEVEL_HEADER, " crunch!");
+ }
+ return JB_ERR_OK;
}
-#if defined(DETECT_MSIE_IMAGES)
+/* the following functions add headers directly to the header list */
+
/*********************************************************************
*
- * Function : client_accept
+ * Function : client_host_adder
*
- * Description : Detect whether the client wants HTML or an image.
- * Clients do not always make this information available
- * in a sane way. Always passes the header through
- * the proxy unchanged.
+ * Description : (re)adds the host header. Called from `sed'.
*
* Parameters :
- * 1 : v = Ignored.
- * 2 : s = Header string. Null terminated.
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : Duplicate of argument s.
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_accept(const struct parsers *v, char *s, struct client_state *csp)
+jb_err client_host_adder(struct client_state *csp)
{
-#ifdef DETECT_MSIE_IMAGES
- if (strstr (s, "image/gif"))
+ char *p;
+ char *pos;
+ jb_err err;
+
+ if ( !csp->http->hostport || !*(csp->http->hostport))
{
- /* Client will accept HTML. If this seems counterintuitive,
- * blame Microsoft.
- */
- csp->accept_types |= ACCEPT_TYPE_MSIE_HTML;
+ return JB_ERR_OK;
+ }
+
+ p = strdup("Host: ");
+ /*
+ ** remove 'user:pass@' from 'proto://user:pass@host'
+ */
+ if ( (pos = strchr( csp->http->hostport, '@')) != NULL )
+ {
+ string_append(&p, pos+1);
}
else
{
- csp->accept_types |= ACCEPT_TYPE_MSIE_IMAGE;
+ string_append(&p, csp->http->hostport);
}
-#endif /* def DETECT_MSIE_IMAGES */
- return(strdup(s));
+ if (p == NULL)
+ {
+ return JB_ERR_MEMORY;
+ }
-}
-#endif /* defined(DETECT_MSIE_IMAGES) */
+ log_error(LOG_LEVEL_HEADER, "addh: %s", p);
+ err = enlist(csp->headers, p);
+ freez(p);
-/* the following functions add headers directly to the header list */
+ return err;
+}
/*********************************************************************
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : N/A
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-void client_cookie_adder(struct client_state *csp)
+jb_err client_cookie_adder(struct client_state *csp)
{
- struct list *l;
- char *tmp = NULL;
- char *e;
+ struct list_entry *lst;
+ char *tmp;
+ struct list_entry *list1 = csp->cookie_list->first;
+ struct list_entry *list2 = csp->action->multi[ACTION_MULTI_WAFER]->first;
+ int first_cookie = 1;
+ jb_err err;
+
+ if ((list1 == NULL) && (list2 == NULL))
+ {
+ /* Nothing to do */
+ return JB_ERR_OK;
+ }
+
+ tmp = strdup("Cookie: ");
- for (l = csp->cookie_list->next; l ; l = l->next)
+ for (lst = list1; lst ; lst = lst->next)
{
- if (tmp)
+ if (first_cookie)
+ {
+ first_cookie = 0;
+ }
+ else
{
- tmp = strsav(tmp, "; ");
+ string_append(&tmp, "; ");
}
- tmp = strsav(tmp, l->str);
+ string_append(&tmp, lst->str);
}
- for (l = csp->config->wafer_list->next; l ; l = l->next)
+ for (lst = list2; lst ; lst = lst->next)
{
- if (tmp)
+ if (first_cookie)
{
- tmp = strsav(tmp, "; ");
+ first_cookie = 0;
}
-
- if ((e = cookie_encode(l->str)))
+ else
{
- tmp = strsav(tmp, e);
- freez(e);
+ string_append(&tmp, "; ");
}
+ string_join(&tmp, cookie_encode(lst->str));
}
- if (tmp)
+ if (tmp == NULL)
{
- char *ret;
+ return JB_ERR_MEMORY;
+ }
- ret = strdup("Cookie: ");
- ret = strsav(ret, tmp);
- log_error(LOG_LEVEL_HEADER, "addh: %s", ret);
- enlist(csp->headers, ret);
- freez(tmp);
- freez(ret);
+ log_error(LOG_LEVEL_HEADER, "addh: %s", tmp);
+ err = enlist(csp->headers, tmp);
+ free(tmp);
+ return err;
+}
+
+
+/*********************************************************************
+ *
+ * Function : client_accept_encoding_adder
+ *
+ * Description : Add an Accept-Encoding header to the client's request
+ * that disables compression if the action applies, and
+ * the header is not already there. Called from `sed'.
+ * Note: For HTTP/1.0, the absence of the header is enough.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
+ *
+ *********************************************************************/
+jb_err client_accept_encoding_adder(struct client_state *csp)
+{
+ if ( ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
+ && (!strcmpic(csp->http->ver, "HTTP/1.1")) )
+ {
+ return enlist_unique(csp->headers, "Accept-Encoding: identity;q=1.0, *;q=0", 16);
}
+ return JB_ERR_OK;
}
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : N/A
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-void client_xtra_adder(struct client_state *csp)
+jb_err client_xtra_adder(struct client_state *csp)
{
- struct list *l;
+ struct list_entry *lst;
+ jb_err err;
- for (l = csp->config->xtra_list->next; l ; l = l->next)
+ for (lst = csp->action->multi[ACTION_MULTI_ADD_HEADER]->first;
+ lst ; lst = lst->next)
{
- log_error(LOG_LEVEL_HEADER, "addh: %s", l->str);
- enlist(csp->headers, l->str);
+ log_error(LOG_LEVEL_HEADER, "addh: %s", lst->str);
+ err = enlist(csp->headers, lst->str);
+ if (err)
+ {
+ return err;
+ }
+
}
+ return JB_ERR_OK;
}
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : N/A
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-void client_x_forwarded_adder(struct client_state *csp)
+jb_err client_x_forwarded_adder(struct client_state *csp)
{
char *p = NULL;
+ jb_err err;
- if (csp->config->add_forwarded == 0)\r
- {\r
- return;\r
+ if ((csp->action->flags & ACTION_HIDE_FORWARDED) != 0)
+ {
+ return JB_ERR_OK;
}
if (csp->x_forwarded)
{
- p = strsav(p, csp->x_forwarded);
- p = strsav(p, ", ");
- p = strsav(p, csp->ip_addr_str);
+ p = strdup(csp->x_forwarded);
+ string_append(&p, ", ");
}
else
{
- p = strsav(p, "X-Forwarded-For: ");
- p = strsav(p, csp->ip_addr_str);
+ p = strdup("X-Forwarded-For: ");
+ }
+ string_append(&p, csp->ip_addr_str);
+
+ if (p == NULL)
+ {
+ return JB_ERR_MEMORY;
}
log_error(LOG_LEVEL_HEADER, "addh: %s", p);
- enlist(csp->headers, p);
+ err = enlist(csp->headers, p);
+ free(p);
+ return err;
}
/*********************************************************************
*
- * Function : server_set_cookie
+ * Function : connection_close_adder
*
- * Description : Handle the server "cookie" header properly.
- * Log cookie to the jar file. Then "crunch" it,
- * or accept it. Called from `sed'.
+ * Description : Adds a "Connection: close" header to csp->headers
+ * as a temporary fix for the needed but missing HTTP/1.1
+ * support. Called from `sed'.
+ * FIXME: This whole function shouldn't be neccessary!
*
* Parameters :
- * 1 : v = parser pattern that matched this header
- * 2 : s = header that matched this pattern
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : `crumble' or a newly malloc'ed string.
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *server_set_cookie(const struct parsers *v, char *s, struct client_state *csp)
+jb_err connection_close_adder(struct client_state *csp)
{
-#ifdef JAR_FILES
- if (csp->config->jar)
+ return enlist(csp->headers, "Connection: close");
+}
+
+
+/*********************************************************************
+ *
+ * Function : server_http
+ *
+ * Description : - Save the HTTP Status into csp->http->status
+ * - Set CT_TABOO to prevent filtering if the answer
+ * is a partial range (HTTP status 206)
+ * - Rewrite HTTP/1.1 answers to HTTP/1.0 if +downgrade
+ * action applies.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
+ *
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
+ *
+ *********************************************************************/
+jb_err server_http(struct client_state *csp, char **header)
+{
+ sscanf(*header, "HTTP/%*d.%*d %d", &(csp->http->status));
+ if (csp->http->status == 206)
{
- fprintf(csp->config->jar, "%s\t%s\n", csp->http->host, (s + v->len + 1));
+ csp->content_type = CT_TABOO;
}
-#endif /* def JAR_FILES */
- if (!(csp->permissions & PERMIT_COOKIE_SET))
+ if ((csp->action->flags & ACTION_DOWNGRADE) != 0)
{
- return(crumble(v, s, csp));
+ (*header)[7] = '0';
+ log_error(LOG_LEVEL_HEADER, "Downgraded answer to HTTP/1.0");
}
- return(strdup(s));
-
+ return JB_ERR_OK;
}
-#ifdef FORCE_LOAD
/*********************************************************************
*
- * Function : client_host
+ * Function : server_set_cookie
*
- * Description : Clean the FORCE_PREFIX out of the 'host' http
- * header, if we use force
+ * Description : Handle the server "cookie" header properly.
+ * Log cookie to the jar file. Then "crunch" it,
+ * or accept it. Called from `sed'.
*
* Parameters :
- * 1 : v = ignored
- * 2 : s = header (from sed) to clean
- * 3 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : header = On input, pointer to header to modify.
+ * On output, pointer to the modified header, or NULL
+ * to remove the header. This function frees the
+ * original string if necessary.
*
- * Returns : A malloc'ed pointer to the cleaned host header
+ * Returns : JB_ERR_OK on success, or
+ * JB_ERR_MEMORY on out-of-memory error.
*
*********************************************************************/
-char *client_host(const struct parsers *v, char *s, struct client_state *csp)
+jb_err server_set_cookie(struct client_state *csp, char **header)
{
- char *cleanhost = strdup(s);
-
- if(csp->force)
- strclean(cleanhost, FORCE_PREFIX);
-
- return(cleanhost);
+#ifdef FEATURE_COOKIE_JAR
+ if (csp->config->jar)
+ {
+ /*
+ * Write timestamp into outbuf.
+ *
+ * Complex because not all OSs have tm_gmtoff or
+ * the %z field in strftime()
+ */
+ char tempbuf[ BUFFER_SIZE ];
+ time_t now;
+ struct tm tm_now;
+ time (&now);
+#ifdef HAVE_LOCALTIME_R
+ tm_now = *localtime_r(&now, &tm_now);
+#else
+ tm_now = *localtime (&now);
+#endif
+ strftime(tempbuf, BUFFER_SIZE-6, "%b %d %H:%M:%S ", &tm_now);
+
+ /* strlen("set-cookie: ") = 12 */
+ fprintf(csp->config->jar, "%s %s\t%s\n", tempbuf, csp->http->host, *header + 12);
+ }
+#endif /* def FEATURE_COOKIE_JAR */
+
+ if ((csp->action->flags & ACTION_NO_COOKIE_SET) != 0)
+ {
+ return crumble(csp, header);
+ }
+ else if ((csp->action->flags & ACTION_NO_COOKIE_KEEP) != 0)
+ {
+ /* Flag whether or not to log a message */
+ int changed = 0;
+
+ /* A variable to store the tag we're working on */
+ char *cur_tag;
+
+ /* Skip "Set-Cookie:" (11 characters) in header */
+ cur_tag = *header + 11;
+
+ /* skip whitespace between "Set-Cookie:" and value */
+ while (*cur_tag && ijb_isspace(*cur_tag))
+ {
+ cur_tag++;
+ }
+
+ /* Loop through each tag in the cookie */
+ while (*cur_tag)
+ {
+ /* Find next tag */
+ char *next_tag = strchr(cur_tag, ';');
+ if (next_tag != NULL)
+ {
+ /* Skip the ';' character itself */
+ next_tag++;
+
+ /* skip whitespace ";" and start of tag */
+ while (*next_tag && ijb_isspace(*next_tag))
+ {
+ next_tag++;
+ }
+ }
+ else
+ {
+ /* "Next tag" is the end of the string */
+ next_tag = cur_tag + strlen(cur_tag);
+ }
+
+ /* Is this the "Expires" tag? */
+ if (strncmpic(cur_tag, "expires=", 8) == 0)
+ {
+ /* Delete the tag by copying the rest of the string over it.
+ * (Note that we cannot just use "strcpy(cur_tag, next_tag)",
+ * since the behaviour of strcpy is undefined for overlapping
+ * strings.)
+ */
+ memmove(cur_tag, next_tag, strlen(next_tag) + 1);
+
+ /* That changed the header, need to issue a log message */
+ changed = 1;
+
+ /* Note that the next tag has now been moved to *cur_tag,
+ * so we do not need to update the cur_tag pointer.
+ */
+ }
+ else
+ {
+ /* Move on to next cookie tag */
+ cur_tag = next_tag;
+ }
+ }
+
+ if (changed)
+ {
+ log_error(LOG_LEVEL_HEADER, "Changed cookie to a temporary one.");
+ }
+ }
+
+ return JB_ERR_OK;
}
-#endif /* def FORCE_LOAD */
-
-
-#ifdef FORCE_LOAD
+
+
+#ifdef FEATURE_FORCE_LOAD
/*********************************************************************
*
* Function : strclean
*
- * Description : In-Situ-Eliminate all occurances of substring in
+ * Description : In-Situ-Eliminate all occurances of substring in
* string
*
* Parameters :
int hits = 0, len = strlen(substring);
char *pos, *p;
- while((pos = strstr(string, substring)))
+ while((pos = strstr(string, substring)) != NULL)
{
p = pos + len;
do
{
- *(p - len) = *p;
+ *(p - len) = *p;
}
while (*p++ != '\0');
return(hits);
}
-#endif /* def FORCE_LOAD */
+#endif /* def FEATURE_FORCE_LOAD */
/*
projects / privoxy.git / blobdiff