-const char parsers_rcs[] = "$Id: parsers.c,v 1.42 2001/11/22 21:59:30 jongfoster Exp $";
+const char parsers_rcs[] = "$Id: parsers.c,v 1.17 2001/06/29 21:45:41 oes Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/parsers.c,v $
* IJBSWA team. http://ijbswa.sourceforge.net
*
* 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 1.42 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
*
* CRLF -> LF
*
* Revision 1.11 2001/05/29 20:11:19 joergs
- * '/ * inside comment' warning removed.
+ * '/* inside comment' warning removed.
*
* Revision 1.10 2001/05/29 09:50:24 jongfoster
* Unified blocklist/imagelist/permissionslist.
#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>
-#if !defined(_WIN32) && !defined(__OS2__)
+#ifndef _WIN32
#include <unistd.h>
#endif
#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"
+#include "cgi.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 },
- { "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 },
+#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 */
+/* { "if-modified-since:", 18, crumble }, */
{ NULL, 0, NULL }
};
const struct parsers server_patterns[] = {
- { "HTTP", 4, server_http },
{ "set-cookie:", 11, server_set_cookie },
{ "connection:", 11, crumble },
- { "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 },
+ { "Content-Type:", 13, content_type },
+ { "Content-Length:", 15, content_length },
{ NULL, 0, NULL }
};
void (* const add_client_headers[])(struct client_state *) = {
- 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 *) = {
- connection_close_adder,
NULL
};
}
-/*********************************************************************
- *
- * Function : get_header_value
- *
- * 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 : header_list = pointer to list
- * 2 : header_name = string with name of header to look for.
- * Trailing colon required, capitalization
- * doesn't matter.
- *
- * Returns : NULL if not found, else value of header
- *
- *********************************************************************/
-char *get_header_value(const struct list *header_list, const char *header_name)
-{
- struct list_entry *cur_entry;
- char *ret = NULL;
- size_t length = 0;
-
- assert(header_list);
- assert(header_name);
- length = strlen(header_name);
-
- for (cur_entry = header_list->first; cur_entry ; cur_entry = cur_entry->next)
- {
- if (cur_entry->str)
- {
- 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);
- }
- }
- }
-
- /*
- * 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, or NULL
- * on out-of-memory error.
+ * Returns : Single pointer to a fully formed header.
*
*********************************************************************/
char *sed(const struct parsers pats[], void (* const more_headers[])(struct client_state *), struct client_state *csp)
{
- struct list_entry *p;
+ struct list *p;
const struct parsers *v;
char *hdr;
void (* const *f)();
for (v = pats; v->str ; v++)
{
- for (p = csp->headers->first; p ; p = p->next)
+ for (p = csp->headers->next; p ; p = p->next)
{
/* Header crunch()ed in previous run? -> ignore */
if (p->str == NULL) continue;
if (strncmpic(p->str, v->str, v->len) == 0)
{
hdr = v->parser(v, p->str, csp);
- freez(p->str); /* FIXME: Yuck! patching a list...*/
+ freez(p->str);
p->str = hdr;
}
}
(*f)(csp);
}
+ /* add the blank line at the end of the header, if necessary */
+ if ( (csp->headers->last == NULL)
+ || (csp->headers->last->str == NULL)
+ || (*csp->headers->last->str != '\0') )
+ {
+ enlist(csp->headers, "");
+ }
+
hdr = list_to_text(csp->headers);
- return hdr;
+ return(hdr);
}
*********************************************************************/
void free_http_request(struct http_request *http)
{
- assert(http);
-
freez(http->cmd);
freez(http->gpc);
freez(http->host);
- freez(http->url);
freez(http->hostport);
freez(http->path);
freez(http->ver);
int n;
memset(http, '\0', sizeof(*http));
+
http->cmd = strdup(req);
buf = strdup(req);
http->ver = strdup(v[2]);
}
- /* or it could be any other basic HTTP request type */
- if ((0 == strcmpic(v[0], "get"))
- || (0 == strcmpic(v[0], "head"))
- || (0 == strcmpic(v[0], "post"))
- || (0 == strcmpic(v[0], "put"))
- || (0 == strcmpic(v[0], "delete"))
-
- /* or a webDAV extension (RFC2518) */
- || (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"))
- )
+#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
+ */
+
+#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"))
+
+#else /* No webDAV support is enabled. Provide an empty OR_WEBDAV macro. */
+
+#define OR_WEBDAV
+
+#endif
+
+ /* 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))
{
- http->ssl = 0;
- http->gpc = strdup(v[0]);
- http->url = strdup(v[1]);
- http->ver = strdup(v[2]);
+ http->ssl = 0;
+ http->gpc = strdup(v[0]);
+ url = v[1];
+ http->ver = strdup(v[2]);
- url = v[1];
if (strncmpic(url, "http://", 7) == 0)
{
url += 7;
if (url)
{
- if ((p = strchr(url, '/')))
+ if (p = strchr(url, '/'))
{
http->path = strdup(p);
*p = '\0';
http->hostport = strdup(url);
}
- /*
+ /*
* Repair broken HTTP requests that don't contain a path
*/
else
{
+ /* Repair hostport & path */
http->path = strdup("/");
http->hostport = strdup(url);
+
+ /* Even repair cmd in case we're just forwarding. Boy are we nice ;-) */
+ freez(http->cmd);
+ http->cmd = strsav(http->cmd, http->gpc);
+ http->cmd = strsav(http->cmd, " / ");
+ http->cmd = strsav(http->cmd, http->ver);
}
}
}
if (http->path == NULL)
{
- http->path = strdup("/");
+ http->path = strdup("");
}
}
* Returns : Always NULL.
*
*********************************************************************/
-char *crumble(const struct parsers *v, const char *s, struct client_state *csp)
+char *crumble(const struct parsers *v, char *s, struct client_state *csp)
{
log_error(LOG_LEVEL_HEADER, "crunch!");
return(NULL);
/*********************************************************************
*
- * Function : server_content_type
+ * Function : content_type
*
- * Description : Set the content-type for filterable types (text/.*,
- * javascript and image/gif) unless filtering has been
- * forbidden (CT_TABOO) while parsing earlier headers.
+ * Description : Is this a text/.* or javascript MIME Type?
*
* Parameters :
* 1 : v = ignored
* Returns : A duplicate string pointer to this header (ie. pass thru)
*
*********************************************************************/
-char *server_content_type(const struct parsers *v, const char *s, struct client_state *csp)
+char *content_type(const struct parsers *v, char *s, struct client_state *csp)
{
- if (csp->content_type != CT_TABOO)
- {
- if (strstr(s, " text/") || strstr(s, "application/x-javascript"))
- csp->content_type = CT_TEXT;
- else if (strstr(s, " image/gif"))
- csp->content_type = CT_GIF;
- else
- csp->content_type = 0;
- }
-
- return(strdup(s));
-
-}
-
-
-/*********************************************************************
- *
- * 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 : v = ignored
- * 2 : s = header string we are "considering"
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : A duplicate string pointer to this header (ie. pass thru)
- *
- *********************************************************************/
-char *server_transfer_coding(const struct parsers *v, const char *s, struct client_state *csp)
-{
- /*
- * Turn off pcrs and gif filtering if body compressed
- */
- if (strstr(s, "gzip") || strstr(s, "compress") || strstr(s, "deflate"))
- {
- csp->content_type = CT_TABOO;
- }
-
- /*
- * Raise flag if body chunked
- */
- if (strstr(s, "chunked"))
- {
- csp->flags |= CSP_FLAG_CHUNKED;
-
- /*
- * If the body was modified, it has been
- * de-chunked first, so adjust the header:
- */
- if (csp->flags & CSP_FLAG_MODIFIED)
- {
- return(strdup("Transfer-Encoding: identity"));
- }
- }
-
- return(strdup(s));
-
-}
-
-
-/*********************************************************************
- *
- * Function : server_content_encoding
- *
- * Description : Prohibit filtering (CT_TABOO) if content encoding compresses
- *
- * Parameters :
- * 1 : v = ignored
- * 2 : s = header string we are "considering"
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : A duplicate string pointer to this header (ie. pass thru)
- *
- *********************************************************************/
-char *server_content_encoding(const struct parsers *v, const char *s, struct client_state *csp)
-{
- /*
- * Turn off pcrs and gif filtering if body compressed
- */
- if (strstr(s, "gzip") || strstr(s, "compress") || strstr(s, "deflate"))
- {
- csp->content_type = CT_TABOO;
- }
+ if (strstr(s, " text/") || strstr(s, "application/x-javascript"))
+ csp->content_type = CT_TEXT;
+ else if (strstr(s, " image/gif"))
+ csp->content_type = CT_GIF;
+ else
+ csp->content_type = 0;
return(strdup(s));
/*********************************************************************
*
- * Function : server_content_length
+ * Function : content_length
*
* Description : Adjust Content-Length header if we modified
* the body.
* Returns : A duplicate string pointer to this header (ie. pass thru)
*
*********************************************************************/
-char *server_content_length(const struct parsers *v, const char *s, struct client_state *csp)
+char *content_length(const struct parsers *v, char *s, struct client_state *csp)
{
- if (csp->content_length != 0) /* Content length has been modified */
- {
- char * s2 = (char *) zalloc(100);
- sprintf(s2, "Content-Length: %d", (int) csp->content_length);
-
- log_error(LOG_LEVEL_HEADER, "Adjust Content-Length to %d", (int) csp->content_length);
- return(s2);
- }
- else
+ if (csp->content_length != 0) /* Content has been modified */
{
- return(strdup(s));
- }
-
-}
+ s = (char *) zalloc(100);
+ sprintf(s, "Content-Length: %d", csp->content_length);
-
-/*********************************************************************
- *
- * Function : server_content_md5
- *
- * Description : Crumble any Content-MD5 headers if the document was
- * modified. FIXME: Should we re-compute instead?
- *
- * Parameters :
- * 1 : v = ignored
- * 2 : s = header string we are "considering"
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : A duplicate string pointer to this header (ie. pass thru)
- *
- *********************************************************************/
-char *server_content_md5(const struct parsers *v, const char *s, struct client_state *csp)
-{
- if (csp->flags & CSP_FLAG_MODIFIED)
- {
- log_error(LOG_LEVEL_HEADER, "Crunching Content-MD5");
- return(NULL);
+ log_error(LOG_LEVEL_HEADER, "Adjust Content-Length to %d", csp->content_length);
+ return(s);
}
else
{
}
-/*********************************************************************
- *
- * Function : client_accept_encoding
- *
- * 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 = ignored
- * 2 : s = header string we are "considering"
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : A copy of the client's original or the modified header.
- *
- *********************************************************************/
-char *client_accept_encoding(const struct parsers *v, const char *s, struct client_state *csp)
-{
- if ((csp->action->flags & ACTION_NO_COMPRESSION) == 0)
- {
- return(strdup(s));
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "Supressed offer to compress content");
-
- if (!strcmpic(csp->http->ver, "HTTP/1.1"))
- {
- return(strdup("Accept-Encoding: identity;q=1.0, *;q=0"));
- }
- else
- {
- return(NULL);
- }
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : client_te
- *
- * 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...)
- *
- * Returns : A copy of the client's original or the modified header.
- *
- *********************************************************************/
-char *client_te(const struct parsers *v, const char *s, struct client_state *csp)
-{
- if ((csp->action->flags & ACTION_NO_COMPRESSION) == 0)
- {
- return(strdup(s));
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "Supressed offer to compress transfer");
- return(NULL);
- }
-
-}
-
/*********************************************************************
*
* Function : client_referrer
* or modified header
*
*********************************************************************/
-char *client_referrer(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_referrer(const struct parsers *v, char *s, struct client_state *csp)
{
const char * newval;
- char * s2;
-#ifdef FEATURE_FORCE_LOAD
+#ifdef 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 FEATURE_FORCE_LOAD */
+#endif /* def FORCE_LOAD */
+
+#ifdef TRUST_FILES
+ csp->referrer = strdup(s);
+#endif /* def TRUST_FILES */
/*
* Are we sending referer?
* to fool stupid checks for in-site links
*/
log_error(LOG_LEVEL_HEADER, "crunch+forge!");
- s2 = strsav(NULL, "Referer: ");
- s2 = strsav(s2, "http://");
- s2 = strsav(s2, csp->http->hostport);
- s2 = strsav(s2, "/");
- return(s2);
+ s = strsav(NULL, "Referer: ");
+ s = strsav(s, "http://");
+ s = strsav(s, csp->http->hostport);
+ s = strsav(s, "/");
+ return(s);
}
/*
/*
* We have a specific (fixed) referer we want to send.
*/
- char * s3;
log_error(LOG_LEVEL_HEADER, "modified");
- s3 = strsav( NULL, "Referer: " );
- s3 = strsav( s3, newval );
- return(s3);
+ s = strsav( NULL, "Referer: " );
+ s = strsav( s, newval );
+ return(s);
}
/* Should never get here! */
* to fool stupid checks for in-site links
*/
log_error(LOG_LEVEL_HEADER, "crunch+forge!");
- s2 = strsav(NULL, "Referer: ");
- s2 = strsav(s2, "http://");
- s2 = strsav(s2, csp->http->hostport);
- s2 = strsav(s2, "/");
- return(s2);
+ s = strsav(NULL, "Referer: ");
+ s = strsav(s, "http://");
+ s = strsav(s, csp->http->hostport);
+ s = strsav(s, "/");
+ return(s);
}
*
* Function : client_uagent
*
- * Description : Handle the "user-agent" config setting properly
- * and remember its original value to enable browser
- * bug workarounds. Called from `sed'.
+ * Description : Handle the "user-agent" config setting properly.
+ * Called from `sed'.
*
* Parameters :
* 1 : v = ignored
* a malloc'ed string pointer to this header (ie. pass thru).
*
*********************************************************************/
-char *client_uagent(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_uagent(const struct parsers *v, char *s, struct client_state *csp)
{
const char * newval;
- char * s2;
+
+#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 */
if ((csp->action->flags & ACTION_HIDE_USER_AGENT) == 0)
{
log_error(LOG_LEVEL_HEADER, "modified");
- s2 = strsav( NULL, "User-Agent: " );
- s2 = strsav( s2, newval );
- return(s2);
+ s = strsav( NULL, "User-Agent: " );
+ s = strsav( s, newval );
+ return(s);
}
* Returns : NULL if crunched, or a malloc'ed string to original header
*
*********************************************************************/
-char *client_ua(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_ua(const struct parsers *v, char *s, struct client_state *csp)
{
if ((csp->action->flags & ACTION_HIDE_USER_AGENT) == 0)
{
* modified/original header.
*
*********************************************************************/
-char *client_from(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_from(const struct parsers *v, char *s, struct client_state *csp)
{
const char * newval;
- char * s2;
if ((csp->action->flags & ACTION_HIDE_FROM) == 0)
{
log_error(LOG_LEVEL_HEADER, " modified");
- s2 = strsav( NULL, "From: " );
- s2 = strsav( s2, newval );
- return(s2);
+ s = strsav( NULL, "From: " );
+ s = strsav( s, newval );
+ return(s);
}
* Returns : Always NULL.
*
*********************************************************************/
-char *client_send_cookie(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_send_cookie(const struct parsers *v, char *s, struct client_state *csp)
{
if ((csp->action->flags & ACTION_NO_COOKIE_READ) == 0)
{
* Returns : Always NULL.
*
*********************************************************************/
-char *client_x_forwarded(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_x_forwarded(const struct parsers *v, char *s, struct client_state *csp)
{
if ((csp->action->flags & ACTION_HIDE_FORWARDED) == 0)
{
}
-/* the following functions add headers directly to the header list */
-
+#if defined(DETECT_MSIE_IMAGES)
/*********************************************************************
*
- * Function : client_host_adder
+ * Function : client_accept
*
- * Description : (re)adds the host header. Called from `sed'.
+ * 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.
*
* Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : v = Ignored.
+ * 2 : s = Header string. Null terminated.
+ * 3 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : N/A
+ * Returns : Duplicate of argument s.
*
*********************************************************************/
-void client_host_adder(struct client_state *csp)
+char *client_accept(const struct parsers *v, char *s, struct client_state *csp)
{
- char *p = NULL;
-
- p = strsav(p, "Host: ");
- p = strsav(p, csp->http->hostport);
+#ifdef DETECT_MSIE_IMAGES
+ if (strstr (s, "image/gif"))
+ {
+ /* Client will accept HTML. If this seems counterintuitive,
+ * blame Microsoft.
+ */
+ csp->accept_types |= ACCEPT_TYPE_MSIE_HTML;
+ }
+ else
+ {
+ csp->accept_types |= ACCEPT_TYPE_MSIE_IMAGE;
+ }
+#endif /* def DETECT_MSIE_IMAGES */
- log_error(LOG_LEVEL_HEADER, "addh: %s", p);
- enlist(csp->headers, p);
+ return(strdup(s));
- freez(p);
}
+#endif /* defined(DETECT_MSIE_IMAGES) */
+
+
+
+/* the following functions add headers directly to the header list */
/*********************************************************************
*********************************************************************/
void client_cookie_adder(struct client_state *csp)
{
- struct list_entry *lst;
+ struct list *lst;
char *tmp = NULL;
char *e;
- for (lst = csp->cookie_list->first; lst ; lst = lst->next)
+ for (lst = csp->cookie_list->next; lst ; lst = lst->next)
{
if (tmp)
{
tmp = strsav(tmp, lst->str);
}
- for (lst = csp->action->multi[ACTION_MULTI_WAFER]->first; lst ; lst = lst->next)
+ for (lst = csp->action->multi[ACTION_MULTI_WAFER]->next; lst ; lst = lst->next)
{
if (tmp)
{
}
-/*********************************************************************
- *
- * 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 : N/A
- *
- *********************************************************************/
-void client_accept_encoding_adder(struct client_state *csp)
-{
- if ( ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
- && (!strcmpic(csp->http->ver, "HTTP/1.1")) )
- {
- enlist_unique(csp->headers, "Accept-Encoding: identity;q=1.0, *;q=0", 16);
- }
-
-}
-
-
/*********************************************************************
*
* Function : client_xtra_adder
*********************************************************************/
void client_xtra_adder(struct client_state *csp)
{
- struct list_entry *lst;
+ struct list *lst = csp->action->multi[ACTION_MULTI_ADD_HEADER];
- for (lst = csp->action->multi[ACTION_MULTI_ADD_HEADER]->first;
- lst ; lst = lst->next)
+ for (lst = lst->next; lst ; lst = lst->next)
{
log_error(LOG_LEVEL_HEADER, "addh: %s", lst->str);
enlist(csp->headers, lst->str);
log_error(LOG_LEVEL_HEADER, "addh: %s", p);
enlist(csp->headers, p);
- freez(p);
-}
-
-
-/*********************************************************************
- *
- * Function : connection_close_adder
- *
- * 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 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : N/A
- *
- *********************************************************************/
-void connection_close_adder(struct client_state *csp)
-{
- enlist(csp->headers, "Connection: close");
}
/*********************************************************************
*
- * Function : server_http
+ * Function : server_set_cookie
*
- * 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.
+ * 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 = parser pattern that matched this header
* 2 : s = header that matched this pattern
* 3 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : Copy of changed or original answer.
+ * Returns : `crumble' or a newly malloc'ed string.
*
*********************************************************************/
-char *server_http(const struct parsers *v, const char *s, struct client_state *csp)
+char *server_set_cookie(const struct parsers *v, char *s, struct client_state *csp)
{
- char *ret = strdup(s);
-
- sscanf(ret, "HTTP/%*d.%*d %d", &(csp->http->status));
- if (csp->http->status == 206)
+#ifdef JAR_FILES
+ if (csp->config->jar)
{
- csp->content_type = CT_TABOO;
+ fprintf(csp->config->jar, "%s\t%s\n", csp->http->host, (s + v->len + 1));
}
+#endif /* def JAR_FILES */
- if ((csp->action->flags & ACTION_DOWNGRADE) != 0)
+ if ((csp->action->flags & ACTION_NO_COOKIE_SET) != 0)
{
- ret[7] = '0';
- log_error(LOG_LEVEL_HEADER, "Downgraded answer to HTTP/1.0");
+ return(crumble(v, s, csp));
}
- return(ret);
+
+ return(strdup(s));
}
+#ifdef FORCE_LOAD
/*********************************************************************
*
- * Function : server_set_cookie
+ * Function : client_host
*
- * Description : Handle the server "cookie" header properly.
- * Log cookie to the jar file. Then "crunch" it,
- * or accept it. Called from `sed'.
+ * Description : Clean the FORCE_PREFIX out of the 'host' http
+ * header, if we use force
*
* Parameters :
- * 1 : v = parser pattern that matched this header
- * 2 : s = header that matched this pattern
+ * 1 : v = ignored
+ * 2 : s = header (from sed) to clean
* 3 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : `crumble' or a newly malloc'ed string.
+ * Returns : A malloc'ed pointer to the cleaned host header
*
*********************************************************************/
-char *server_set_cookie(const struct parsers *v, const char *s, struct client_state *csp)
+char *client_host(const struct parsers *v, char *s, struct client_state *csp)
{
-#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);
- tm_now = localtime (&now);
- strftime (tempbuf, BUFFER_SIZE-6, "%b %d %H:%M:%S ", tm_now);
-
- fprintf(csp->config->jar, "%s %s\t%s\n", tempbuf, csp->http->host, (s + v->len + 1));
- }
-#endif /* def FEATURE_COOKIE_JAR */
-
- if ((csp->action->flags & ACTION_NO_COOKIE_SET) != 0)
- {
- return(crumble(v, s, csp));
- }
- 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;
-
- /* Make a copy of the header we can write to */
- char * result = strdup(s);
- if (result == NULL)
- {
- /* FIXME: This error handling is incorrect */
- return NULL;
- }
-
- /* Skip "Set-Cookie:" (11 characters) in header */
- cur_tag = result + 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 result;
- }
-
- return(strdup(s));
+ char *cleanhost = strdup(s);
+
+ if(csp->force)
+ strclean(cleanhost, FORCE_PREFIX);
+
+ return(cleanhost);
}
-
-
-#ifdef FEATURE_FORCE_LOAD
+#endif /* def FORCE_LOAD */
+
+
+#ifdef FORCE_LOAD
/*********************************************************************
*
* Function : strclean
*
- * Description : In-Situ-Eliminate all occurances of substring in
+ * Description : In-Situ-Eliminate all occurances of substring in
* string
*
* Parameters :
p = pos + len;
do
{
- *(p - len) = *p;
+ *(p - len) = *p;
}
while (*p++ != '\0');
return(hits);
}
-#endif /* def FEATURE_FORCE_LOAD */
+#endif /* def FORCE_LOAD */
/*
projects / privoxy.git / blobdiff