X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=filters.c;h=744af6a204abdd067c6a1e0f7bedeb1dcba871fa;hp=b703e1de35938e1c0df0e6dfee46d6257869081a;hb=72081f829de368392d04076728f8c991178c0080;hpb=85075982fad8fb5107a6b2651aeef855ba8bace7
diff --git a/filters.c b/filters.c
index b703e1de..744af6a2 100644
--- a/filters.c
+++ b/filters.c
@@ -1,7 +1,7 @@
-const char filters_rcs[] = "$Id: filters.c,v 1.44 2002/03/07 03:49:31 oes Exp $";
+const char filters_rcs[] = "$Id: filters.c,v 1.58.2.9 2006/01/29 23:10:56 david__schmidt Exp $";
/*********************************************************************
*
- * File : $Source: /cvsroot/ijbswa/current/filters.c,v $
+ * File : $Source: /cvsroot/ijbswa/current/Attic/filters.c,v $
*
* Purpose : Declares functions to parse/crunch headers and pages.
* Functions declared include:
@@ -9,10 +9,11 @@ const char filters_rcs[] = "$Id: filters.c,v 1.44 2002/03/07 03:49:31 oes Exp $"
* `block_url', `url_actions', `domain_split',
* `filter_popups', `forward_url', 'redirect_url',
* `ij_untrusted_url', `intercept_url', `pcrs_filter_respose',
- * 'ijb_send_banner', and `trust_url'
+ * `ijb_send_banner', `trust_url', `gif_deanimate_response',
+ * `jpeg_inspect_response'
*
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * IJBSWA team. http://ijbswa.sourceforge.net
+ * Copyright : Written by and Copyright (C) 2001, 2004 the SourceForge
+ * Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
@@ -38,6 +39,90 @@ const char filters_rcs[] = "$Id: filters.c,v 1.44 2002/03/07 03:49:31 oes Exp $"
*
* Revisions :
* $Log: filters.c,v $
+ * Revision 1.58.2.9 2006/01/29 23:10:56 david__schmidt
+ * Multiple filter file support
+ *
+ * Revision 1.58.2.8 2005/05/07 21:50:55 david__schmidt
+ * A few memory leaks plugged (mostly on error paths)
+ *
+ * Revision 1.58.2.7 2004/10/03 12:53:32 david__schmidt
+ * Add the ability to check jpeg images for invalid
+ * lengths of comment blocks. Defensive strategy
+ * against the exploit:
+ * Microsoft Security Bulletin MS04-028
+ * Buffer Overrun in JPEG Processing (GDI+) Could
+ * Allow Code Execution (833987)
+ * Enabled with +inspect-jpegs in actions files.
+ *
+ * Revision 1.58.2.6 2003/12/06 22:18:27 gliptak
+ * Correcting compile problem with FEATURE_IMAGE_BLOCKING
+ *
+ * Revision 1.58.2.5 2003/11/11 13:10:31 oes
+ * Fixed bug #839859: "See why" link URL now gets url-encoded.
+ *
+ * Revision 1.58.2.4 2003/02/28 12:52:45 oes
+ * Fixed a typo
+ *
+ * Revision 1.58.2.3 2002/09/25 14:51:51 oes
+ * Added basic support for OPTIONS and TRACE HTTP methods:
+ * New function direct_response which handles OPTIONS and
+ * TRACE requests whose Max-Forwards header field is zero.
+ *
+ * Revision 1.58.2.2 2002/08/01 17:18:28 oes
+ * Fixed BR 537651 / SR 579724 (MSIE image detect improper for IE/Mac)
+ *
+ * Revision 1.58.2.1 2002/07/26 15:18:53 oes
+ * - Bugfix: Executing a filters without jobs no longer results in
+ * turing off *all* filters.
+ * - Security fix: Malicious web servers can't cause a seg fault
+ * through bogus chunk sizes anymore
+ *
+ * Revision 1.58 2002/04/24 02:11:17 oes
+ * Jon's multiple AF patch: url_actions now evaluates rules
+ * from all AFs.
+ *
+ * Revision 1.57 2002/04/08 20:38:34 swa
+ * fixed JB spelling
+ *
+ * Revision 1.56 2002/04/05 15:51:24 oes
+ * - bugfix: error-pages now get correct request protocol
+ * - fix for invalid HTML in trust info
+ *
+ * Revision 1.55 2002/04/02 16:13:51 oes
+ * Fix: No "Go there anyway" for SSL
+ *
+ * Revision 1.54 2002/04/02 14:55:56 oes
+ * Bugfix: is_untrusted_url() now depends on FEATURE_TRUST, not FEATURE_COOKIE_JAR
+ *
+ * Revision 1.53 2002/03/26 22:29:54 swa
+ * we have a new homepage!
+ *
+ * Revision 1.52 2002/03/24 16:35:57 jongfoster
+ * Removing logo
+ *
+ * Revision 1.51 2002/03/24 15:23:33 jongfoster
+ * Name changes
+ *
+ * Revision 1.50 2002/03/24 13:25:43 swa
+ * name change related issues
+ *
+ * Revision 1.49 2002/03/16 20:29:14 oes
+ * Cosmetics
+ *
+ * Revision 1.48 2002/03/13 20:25:34 oes
+ * Better logging for content filters
+ *
+ * Revision 1.47 2002/03/13 00:30:52 jongfoster
+ * Killing warnings
+ * Added option of always sending redirect for imageblock,
+ * currently disabled with #if 0.
+ *
+ * Revision 1.46 2002/03/12 01:42:49 oes
+ * Introduced modular filters
+ *
+ * Revision 1.45 2002/03/08 16:47:50 oes
+ * Added choice beween GIF and PNG built-in images
+ *
* Revision 1.44 2002/03/07 03:49:31 oes
* - Fixed compiler warnings etc
* - Changed built-in images from GIF to PNG
@@ -331,7 +416,7 @@ const char filters_rcs[] = "$Id: filters.c,v 1.44 2002/03/07 03:49:31 oes Exp $"
* a lot! ;-)
*
* Revision 1.3 2001/05/20 16:44:47 jongfoster
- * Removing last hardcoded JunkBusters.com URLs.
+ * Removing last hardcoded Junkbusters.com URLs.
*
* Revision 1.2 2001/05/20 01:21:20 jongfoster
* Version 2.9.4 checkin.
@@ -487,7 +572,7 @@ int acl_addr(char *aspec, struct access_control_addr *aca)
masklength = 32;
port = 0;
- if ((p = strchr(aspec, '/')))
+ if ((p = strchr(aspec, '/')) != NULL)
{
*p++ = '\0';
@@ -503,7 +588,7 @@ int acl_addr(char *aspec, struct access_control_addr *aca)
return(-1);
}
- if ((p = strchr(aspec, ':')))
+ if ((p = strchr(aspec, ':')) != NULL)
{
*p++ = '\0';
@@ -635,9 +720,6 @@ int match_portlist(const char *portlist, int port)
*********************************************************************/
struct http_response *block_url(struct client_state *csp)
{
-#ifdef FEATURE_IMAGE_BLOCKING
- char *p;
-#endif /* def FEATURE_IMAGE_BLOCKING */
struct http_response *rsp;
/*
@@ -664,19 +746,22 @@ struct http_response *block_url(struct client_state *csp)
if (((csp->action->flags & ACTION_IMAGE_BLOCKER) != 0)
&& is_imageurl(csp))
{
+ char *p;
/* determine HOW images should be blocked */
p = csp->action->string[ACTION_STRING_IMAGE_BLOCKER];
+#if 1 /* Two alternative strategies, use this one for now: */
+
/* and handle accordingly: */
- if ((p == NULL) || (0 == strcmpic(p, "logo")))
+ if ((p == NULL) || (0 == strcmpic(p, "pattern")))
{
- rsp->body = bindup(image_logo_data, image_logo_length);
+ rsp->body = bindup(image_pattern_data, image_pattern_length);
if (rsp->body == NULL)
{
free_http_response(rsp);
return cgi_error_memory();
}
- rsp->content_length = image_logo_length;
+ rsp->content_length = image_pattern_length;
if (enlist_unique_header(rsp->headers, "Content-Type", BUILTIN_IMAGE_MIMETYPE))
{
@@ -702,38 +787,46 @@ struct http_response *block_url(struct client_state *csp)
}
}
- else if (0 == strcmpic(p, "pattern"))
+ else
{
- rsp->body = bindup(image_pattern_data, image_pattern_length);
- if (rsp->body == NULL)
+ rsp->status = strdup("302 Local Redirect from Privoxy");
+ if (rsp->status == NULL)
{
free_http_response(rsp);
return cgi_error_memory();
}
- rsp->content_length = image_pattern_length;
- if (enlist_unique_header(rsp->headers, "Content-Type", BUILTIN_IMAGE_MIMETYPE))
+ if (enlist_unique_header(rsp->headers, "Location", p))
{
free_http_response(rsp);
return cgi_error_memory();
}
}
- else
+#else /* Following code is disabled for now */
+
+ /* and handle accordingly: */
+ if ((p == NULL) || (0 == strcmpic(p, "pattern")))
{
- rsp->status = strdup("302 Local Redirect from Junkbuster");
- if (rsp->status == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
+ p = CGI_PREFIX "send-banner?type=pattern";
+ }
+ else if (0 == strcmpic(p, "blank"))
+ {
+ p = CGI_PREFIX "send-banner?type=blank";
+ }
+ rsp->status = strdup("302 Local Redirect from Privoxy");
+ if (rsp->status == NULL)
+ {
+ free_http_response(rsp);
+ return cgi_error_memory();
+ }
- if (enlist_unique_header(rsp->headers, "Location", p))
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
+ if (enlist_unique_header(rsp->headers, "Location", p))
+ {
+ free_http_response(rsp);
+ return cgi_error_memory();
}
+#endif /* Preceeding code is disabled for now */
}
else
#endif /* def FEATURE_IMAGE_BLOCKING */
@@ -744,6 +837,7 @@ struct http_response *block_url(struct client_state *csp)
{
jb_err err;
struct map * exports;
+ char *p;
/*
* Workaround for stupid Netscape bug which prevents
@@ -779,12 +873,16 @@ struct http_response *block_url(struct client_state *csp)
#ifdef FEATURE_FORCE_LOAD
err = map(exports, "force-prefix", 1, FORCE_PREFIX, 1);
-#else /* ifndef FEATURE_FORCE_LOAD */
- err = map_block_killer(exports, "force-support");
+ if (csp->http->ssl != 0)
#endif /* ndef FEATURE_FORCE_LOAD */
+ {
+ err = map_block_killer(exports, "force-support");
+ }
+ if (!err) err = map(exports, "protocol", 1, csp->http->ssl ? "https://" : "http://", 1);
if (!err) err = map(exports, "hostport", 1, html_encode(csp->http->hostport), 0);
if (!err) err = map(exports, "path", 1, html_encode(csp->http->path), 0);
+ if (!err) err = map(exports, "path-ue", 1, url_encode(csp->http->path), 0);
if (err)
{
@@ -854,9 +952,10 @@ struct http_response *trust_url(struct client_state *csp)
}
/*
- * Export the host, port, and referrer information
+ * Export the protocol, host, port, and referrer information
*/
err = map(exports, "hostport", 1, csp->http->hostport, 1);
+ if (!err) err = map(exports, "protocol", 1, csp->http->ssl ? "https://" : "http://", 1);
if (!err) err = map(exports, "path", 1, csp->http->path, 1);
if (NULL != (p = get_header_value(csp->headers, "Referer:")))
@@ -879,12 +978,13 @@ struct http_response *trust_url(struct client_state *csp)
* Export the trust list
*/
p = strdup("");
- for (tl = csp->config->trust_list; (t = *tl) ; tl++)
+ for (tl = csp->config->trust_list; (t = *tl) != NULL ; tl++)
{
sprintf(buf, "%s\n", t->spec);
string_append(&p, buf);
}
err = map(exports, "trusted-referrers", 1, p, 0);
+ freez(p);
if (err)
{
@@ -903,10 +1003,11 @@ struct http_response *trust_url(struct client_state *csp)
p = strdup("");
for (l = csp->config->trust_info->first; l ; l = l->next)
{
- sprintf(buf, " %s
\n",l->str, l->str);
+ sprintf(buf, " %s
\n",l->str, l->str);
string_append(&p, buf);
}
err = map(exports, "trust-info", 1, p, 0);
+ freez(p);
}
else
{
@@ -976,7 +1077,7 @@ struct http_response *redirect_url(struct client_state *csp)
/*
* find the last URL encoded in the request
*/
- while ((p = strstr(p, "http://")))
+ while ((p = strstr(p, "http://")) != NULL)
{
q = p++;
}
@@ -994,7 +1095,7 @@ struct http_response *redirect_url(struct client_state *csp)
}
if ( enlist_unique_header(rsp->headers, "Location", q)
- || (NULL == (rsp->status = strdup("302 Local Redirect from Junkbuster"))) )
+ || (NULL == (rsp->status = strdup("302 Local Redirect from Privoxy"))) )
{
free_http_response(rsp);
return cgi_error_memory();
@@ -1018,8 +1119,9 @@ struct http_response *redirect_url(struct client_state *csp)
*
* Description : Given a URL, decide whether it is an image or not,
* using either the info from a previous +image action
- * or, #ifdef FEATURE_IMAGE_DETECT_MSIE, the info from
- * the browser's accept header.
+ * or, #ifdef FEATURE_IMAGE_DETECT_MSIE, and the browser
+ * is MSIE and not on a Mac, tell from the browser's accept
+ * header.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
@@ -1034,7 +1136,7 @@ int is_imageurl(struct client_state *csp)
char *tmp;
tmp = get_header_value(csp->headers, "User-Agent:");
- if (tmp && strstr(tmp, "MSIE"))
+ if (tmp && strstr(tmp, "MSIE") && !strstr(tmp, "Mac_"))
{
tmp = get_header_value(csp->headers, "Accept:");
if (tmp && strstr(tmp, "image/gif"))
@@ -1057,7 +1159,7 @@ int is_imageurl(struct client_state *csp)
#endif /* def FEATURE_IMAGE_BLOCKING */
-#ifdef FEATURE_COOKIE_JAR
+#ifdef FEATURE_TRUST
/*********************************************************************
*
* Function : is_untrusted_url
@@ -1111,15 +1213,10 @@ int is_untrusted_url(struct client_state *csp)
return 1;
}
- /*
- * If not, do we maybe trust its referrer?
- */
-
/*
- * Parse the URL from the referrer
+ * If not, do we maybe trust its referrer?
*/
-
err = parse_http_url(referer, rhttp, csp);
if (err)
{
@@ -1137,7 +1234,7 @@ int is_untrusted_url(struct client_state *csp)
FILE *fp;
- if ((fp = fopen(csp->config->trustfile, "a")))
+ if (NULL != (fp = fopen(csp->config->trustfile, "a")))
{
char * path;
char * path_end;
@@ -1181,23 +1278,24 @@ int is_untrusted_url(struct client_state *csp)
}
return 1;
}
-#endif /* def FEATURE_COOKIE_JAR */
+#endif /* def FEATURE_TRUST */
/*********************************************************************
*
* Function : pcrs_filter_response
*
- * Description : Apply all the pcrs jobs from the joblist (re_filterfile)
- * to the text buffer that's been accumulated in
- * csp->iob->buf and set csp->content_length to the modified
- * size and raise the CSP_FLAG_MODIFIED flag if appropriate.
+ * Description : Execute all text substitutions from all applying
+ * +filter actions on the text buffer that's been accumulated
+ * in csp->iob->buf. If this changes the contents, set
+ * csp->content_length to the modified size and raise the
+ * CSP_FLAG_MODIFIED flag.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
* Returns : a pointer to the (newly allocated) modified buffer.
- * or NULL in case something went wrong
+ * or NULL if there were no hits or something went wrong
*
*********************************************************************/
char *pcrs_filter_response(struct client_state *csp)
@@ -1210,14 +1308,41 @@ char *pcrs_filter_response(struct client_state *csp)
struct file_list *fl;
struct re_filterfile_spec *b;
+ struct list_entry *filtername;
+
+ int i, found_filters = 0;
- /* Sanity first */
+ /*
+ * Sanity first
+ */
if (csp->iob->cur >= csp->iob->eod)
{
return(NULL);
}
size = csp->iob->eod - csp->iob->cur;
+ /*
+ * Need to check the set of re_filterfiles...
+ */
+ for (i = 0; i < MAX_AF_FILES; i++)
+ {
+ fl = csp->rlist[i];
+ if (NULL != fl)
+ {
+ if (NULL != fl->f)
+ {
+ found_filters = 1;
+ break;
+ }
+ }
+ }
+
+ if (0 == found_filters)
+ {
+ log_error(LOG_LEVEL_ERROR, "Unable to get current state of regexp filtering.");
+ return(NULL);
+ }
+
/*
* If the body has a "chunked" transfer-encoding,
* get rid of it first, adjusting size and iob->eod
@@ -1233,30 +1358,48 @@ char *pcrs_filter_response(struct client_state *csp)
csp->flags |= CSP_FLAG_MODIFIED;
}
- if ( ( NULL == (fl = csp->rlist) ) || ( NULL == (b = fl->f) ) )
+ for (i = 0; i < MAX_AF_FILES; i++)
{
- log_error(LOG_LEVEL_ERROR, "Unable to get current state of regexp filtering.");
- return(NULL);
- }
-
- if ( NULL == b->joblist )
+ fl = csp->rlist[i];
+ if ((NULL == fl) || (NULL == fl->f))
+ break;
+ /*
+ * For all applying +filter actions, look if a filter by that
+ * name exists and if yes, execute it's pcrs_joblist on the
+ * buffer.
+ */
+ for (b = fl->f; b; b = b->next)
{
- log_error(LOG_LEVEL_RE_FILTER, "Empty joblist. Nothing to do.");
- return(NULL);
- }
+ for (filtername = csp->action->multi[ACTION_MULTI_FILTER]->first;
+ filtername ; filtername = filtername->next)
+ {
+ if (strcmp(b->name, filtername->str) == 0)
+ {
+ int current_hits = 0;
- log_error(LOG_LEVEL_RE_FILTER, "re_filtering %s%s (size %d) ...",
- csp->http->hostport, csp->http->path, size);
+ if ( NULL == b->joblist )
+ {
+ log_error(LOG_LEVEL_RE_FILTER, "Filter %s has empty joblist. Nothing to do.", b->name);
+ continue;
+ }
- /* Apply all jobs from the joblist */
- for (job = b->joblist; NULL != job; job = job->next)
- {
- hits += pcrs_execute(job, old, size, &new, &size);
- if (old != csp->iob->cur) free(old);
- old=new;
- }
+ log_error(LOG_LEVEL_RE_FILTER, "re_filtering %s%s (size %d) with filter %s...",
+ csp->http->hostport, csp->http->path, size, b->name);
- log_error(LOG_LEVEL_RE_FILTER, " produced %d hits (new size %d).", hits, size);
+ /* Apply all jobs from the joblist */
+ for (job = b->joblist; NULL != job; job = job->next)
+ {
+ current_hits += pcrs_execute(job, old, size, &new, &size);
+ if (old != csp->iob->cur) free(old);
+ old=new;
+ }
+
+ log_error(LOG_LEVEL_RE_FILTER, " ...produced %d hits (new size %d).", current_hits, size);
+ hits += current_hits;
+ }
+ }
+ }
+ }
/*
* If there were no hits, destroy our copy and let
@@ -1332,7 +1475,88 @@ char *gif_deanimate_response(struct client_state *csp)
}
else
{
- log_error(LOG_LEVEL_DEANIMATE, "Success! GIF shrunk from %d bytes to %d.", size, out->offset);
+ if ((int)size == out->offset)
+ {
+ log_error(LOG_LEVEL_DEANIMATE, "GIF not changed.");
+ }
+ else
+ {
+ log_error(LOG_LEVEL_DEANIMATE, "Success! GIF shrunk from %d bytes to %d.", size, out->offset);
+ }
+ csp->content_length = out->offset;
+ csp->flags |= CSP_FLAG_MODIFIED;
+ p = out->buffer;
+ free(in);
+ free(out);
+ return(p);
+ }
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : jpeg_inspect_response
+ *
+ * Description :
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : a pointer to the (newly allocated) modified buffer
+ * or NULL in case something went wrong.
+ *
+ *********************************************************************/
+char *jpeg_inspect_response(struct client_state *csp)
+{
+ struct binbuffer *in = NULL, *out = NULL;
+ char *p = NULL;
+ size_t size = csp->iob->eod - csp->iob->cur;
+
+ /*
+ * If the body has a "chunked" transfer-encoding,
+ * get rid of it first, adjusting size and iob->eod
+ */
+ if (csp->flags & CSP_FLAG_CHUNKED)
+ {
+ log_error(LOG_LEVEL_DEANIMATE, "Need to de-chunk first");
+ if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
+ {
+ return(NULL);
+ }
+ csp->iob->eod = csp->iob->cur + size;
+ csp->flags |= CSP_FLAG_MODIFIED;
+ }
+
+ if (NULL == (in = (struct binbuffer *)zalloc(sizeof *in )))
+ {
+ log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg no mem 1)");
+ return NULL;
+ }
+
+ if (NULL == (out = (struct binbuffer *)zalloc(sizeof *out)))
+ {
+ log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg no mem 2)");
+ return NULL;
+ }
+
+ in->buffer = csp->iob->cur;
+ in->size = size;
+
+ /*
+ * Calling jpeg_inspect has the side-effect of creating and
+ * modifying the image buffer of "out" directly.
+ */
+ if (jpeg_inspect(in, out))
+ {
+ log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg parsing)");
+ free(in);
+ buf_free(out);
+ return(NULL);
+
+ }
+ else
+ {
csp->content_length = out->offset;
csp->flags |= CSP_FLAG_MODIFIED;
p = out->buffer;
@@ -1382,7 +1606,12 @@ int remove_chunked_transfer_coding(char *buffer, const size_t size)
log_error(LOG_LEVEL_ERROR, "Parse error while stripping \"chunked\" transfer coding");
return(0);
}
- newsize += chunksize;
+
+ if ((newsize += chunksize) >= size)
+ {
+ log_error(LOG_LEVEL_ERROR, "Chunksize exceeds buffer in \"chunked\" transfer coding");
+ return(0);
+ }
from_p += 2;
memmove(to_p, from_p, (size_t) chunksize);
@@ -1421,16 +1650,21 @@ void url_actions(struct http_request *http,
{
struct file_list *fl;
struct url_actions *b;
+ int i;
init_current_action(csp->action);
- if (((fl = csp->actions_list) == NULL) || ((b = fl->f) == NULL))
+ for (i = 0; i < MAX_AF_FILES; i++)
{
- return;
- }
+ if (((fl = csp->actions_list[i]) == NULL) || ((b = fl->f) == NULL))
+ {
+ return;
+ }
- apply_url_actions(csp->action, http, b);
+ apply_url_actions(csp->action, http, b);
+ }
+ return;
}
@@ -1505,6 +1739,63 @@ const struct forward_spec * forward_url(struct http_request *http,
}
+/*********************************************************************
+ *
+ * Function : direct_response
+ *
+ * Description : Check if Max-Forwards == 0 for an OPTIONS or TRACE
+ * request and if so, return a HTTP 501 to the client.
+ *
+ * FIXME: I have a stupid name and I should handle the
+ * requests properly. Still, what we do here is rfc-
+ * compliant, whereas ignoring or forwarding are not.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : http_response if , NULL if nonmatch or handler fail
+ *
+ *********************************************************************/
+struct http_response *direct_response(struct client_state *csp)
+{
+ struct http_response *rsp;
+ struct list_entry *p;
+
+ if ((0 == strcmpic(csp->http->gpc, "trace"))
+ || (0 == strcmpic(csp->http->gpc, "options")))
+ {
+ for (p = csp->headers->first; (p != NULL) ; p = p->next)
+ {
+ if (!strncmp("Max-Forwards:", p->str, 13)
+ && (*(p->str+13) != '\0') && (atoi(p->str+13) == 0))
+ {
+ /* FIXME: We could handle at least TRACE here,
+ but that would require a verbatim copy of
+ the request which we don't have anymore */
+
+ log_error(LOG_LEVEL_HEADER, "Found Max-Forwards:0 in OPTIONS or TRACE request -- Returning 501");
+
+ /* Get mem for response or fail*/
+ if (NULL == (rsp = alloc_http_response()))
+ {
+ return cgi_error_memory();
+ }
+
+ if (NULL == (rsp->status = strdup("501 Not Implemented")))
+ {
+ free_http_response(rsp);
+ return cgi_error_memory();
+ }
+
+ rsp->is_static = 1;
+ return(finish_http_response(rsp));
+ }
+ }
+ }
+ return NULL;
+}
+
+
/*
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