-const char filters_rcs[] = "$Id: filters.c,v 1.193 2015/08/12 10:34:21 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/filters.c,v $
*
* Purpose : Declares functions to parse/crunch headers and pages.
*
- * Copyright : Written by and Copyright (C) 2001-2014 the
+ * Copyright : Written by and Copyright (C) 2001-2016 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
#include "deanimate.h"
#include "urlmatch.h"
#include "loaders.h"
+#ifdef FEATURE_CLIENT_TAGS
+#include "client-tags.h"
+#endif
#ifdef _WIN32
#include "win32.h"
#endif
-const char filters_h_rcs[] = FILTERS_H_VERSION;
-
typedef char *(*filter_function_ptr)();
static filter_function_ptr get_filter_function(const struct client_state *csp);
-static jb_err remove_chunked_transfer_coding(char *buffer, size_t *size);
static jb_err prepare_for_filtering(struct client_state *csp);
+static void apply_url_actions(struct current_action_spec *action,
+ struct http_request *http,
+#ifdef FEATURE_CLIENT_TAGS
+ const struct list *client_tags,
+#endif
+ struct url_actions *b);
#ifdef FEATURE_ACL
#ifdef HAVE_RFC2553
* 3 : len = length of IP address in octets
* 4 : port = port number in network order;
*
- * Returns : 0 = no errror; -1 otherwise.
+ * Returns : void
*
*********************************************************************/
-static int sockaddr_storage_to_ip(const struct sockaddr_storage *addr,
- uint8_t **ip, unsigned int *len,
- in_port_t **port)
+static void sockaddr_storage_to_ip(const struct sockaddr_storage *addr,
+ uint8_t **ip, unsigned int *len,
+ in_port_t **port)
{
- if (NULL == addr)
- {
- return(-1);
- }
+ assert(NULL != addr);
+ assert(addr->ss_family == AF_INET || addr->ss_family == AF_INET6);
switch (addr->ss_family)
{
}
break;
- default:
- /* Unsupported address family */
- return(-1);
}
-
- return(0);
}
{
p = strchr(acl_spec, ':');
}
+ if (p != NULL)
+ {
+ assert(*p == ':');
+ *p = '\0';
+ p++;
+ }
#ifdef HAVE_RFC2553
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
- i = getaddrinfo(acl_spec, ((p) ? ++p : NULL), &hints, &result);
+ i = getaddrinfo(acl_spec, p, &hints, &result);
if (i != 0)
{
{
char *endptr;
- *p++ = '\0';
port = strtol(p, &endptr, 10);
if (port <= 0 || port > 65535 || *endptr != '\0')
}
aca->mask.ss_family = aca->addr.ss_family;
- if (sockaddr_storage_to_ip(&aca->mask, &mask_data, &addr_len, &mask_port))
- {
- return(-1);
- }
+ sockaddr_storage_to_ip(&aca->mask, &mask_data, &addr_len, &mask_port);
if (p)
{
{"path", csp->http->path, 1},
{"host", csp->http->host, 1},
{"origin", csp->ip_addr_str, 1},
+ {"listen-address", csp->listen_addr_str, 1},
{NULL, NULL, 1}
};
*
* Function : is_imageurl
*
- * 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, and the browser
- * is MSIE and not on a Mac, tell from the browser's accept
- * header.
+ * Description : Given a URL, decide whether it should be treated
+ * as image URL or not.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : True (nonzero) if URL is an image, false (0)
+ * Returns : True (nonzero) if URL is an image URL, false (0)
* otherwise
*
*********************************************************************/
int is_imageurl(const struct client_state *csp)
{
-#ifdef FEATURE_IMAGE_DETECT_MSIE
- char *tmp;
-
- tmp = get_header_value(csp->headers, "User-Agent:");
- if (tmp && strstr(tmp, "MSIE") && !strstr(tmp, "Mac_"))
- {
- tmp = get_header_value(csp->headers, "Accept:");
- if (tmp && strstr(tmp, "image/gif"))
- {
- /* Client will accept HTML. If this seems counterintuitive,
- * blame Microsoft.
- */
- return(0);
- }
- else
- {
- return(1);
- }
- }
-#endif /* def FEATURE_IMAGE_DETECT_MSIE */
-
return ((csp->action->flags & ACTION_IMAGE) != 0);
}
{ "PRIVOXY_PATH", csp->http->path },
{ "PRIVOXY_HOST", csp->http->host },
{ "PRIVOXY_ORIGIN", csp->ip_addr_str },
+ { "PRIVOXY_LISTEN_ADDRESS", csp->listen_addr_str },
};
for (i = 0; i < SZ(env); i++)
}
filter_output = p;
}
+ assert(new_size + READ_LENGTH < *size);
len = fread(&filter_output[new_size], 1, READ_LENGTH, fp);
if (len > 0)
{
* or NULL in case something went wrong.
*
*********************************************************************/
+#ifdef FUZZ
+char *gif_deanimate_response(struct client_state *csp)
+#else
static char *gif_deanimate_response(struct client_state *csp)
+#endif
{
struct binbuffer *in, *out;
char *p;
size = (size_t)(csp->iob->eod - csp->iob->cur);
- if ( (NULL == (in = (struct binbuffer *)zalloc(sizeof *in )))
- || (NULL == (out = (struct binbuffer *)zalloc(sizeof *out))) )
- {
- log_error(LOG_LEVEL_DEANIMATE, "failed! (no mem)");
- return NULL;
- }
+ in = zalloc_or_die(sizeof(*in));
+ out = zalloc_or_die(sizeof(*out));
in->buffer = csp->iob->cur;
in->size = size;
* JB_ERR_PARSE otherwise
*
*********************************************************************/
+#ifdef FUZZ
+extern jb_err remove_chunked_transfer_coding(char *buffer, size_t *size)
+#else
static jb_err remove_chunked_transfer_coding(char *buffer, size_t *size)
+#endif
{
size_t newsize = 0;
unsigned int chunksize = 0;
char *from_p, *to_p;
+ const char *end_of_buffer = buffer + *size;
+
+ if (*size == 0)
+ {
+ log_error(LOG_LEVEL_FATAL, "Invalid chunked input. Buffer is empty.");
+ return JB_ERR_PARSE;
+ }
assert(buffer);
from_p = to_p = buffer;
while (chunksize > 0U)
{
+ /*
+ * If the chunk-size is valid, we should have at least
+ * chunk-size bytes of chunk-data and five bytes of
+ * meta data (chunk-size, CRLF, CRLF) left in the buffer.
+ */
+ if (chunksize + 5 >= *size - newsize)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Chunk size %u exceeds buffered data left. "
+ "Already digested %u of %u buffered bytes.",
+ chunksize, (unsigned int)newsize, (unsigned int)*size);
+ return JB_ERR_PARSE;
+ }
+
+ /*
+ * Skip the chunk-size, the optional chunk-ext and the CRLF
+ * that is supposed to be located directly before the start
+ * of chunk-data.
+ */
if (NULL == (from_p = strstr(from_p, "\r\n")))
{
log_error(LOG_LEVEL_ERROR, "Parse error while stripping \"chunked\" transfer coding");
return JB_ERR_PARSE;
}
+ from_p += 2;
- if (chunksize >= *size - newsize)
+ /*
+ * The previous strstr() does not enforce chunk-validity
+ * and is sattisfied as long a CRLF is left in the buffer.
+ *
+ * Make sure the bytes we consider chunk-data are within
+ * the valid range.
+ */
+ if (from_p + chunksize >= end_of_buffer)
{
log_error(LOG_LEVEL_ERROR,
- "Chunk size %u exceeds buffered data left. "
- "Already digested %u of %u buffered bytes.",
- chunksize, (unsigned int)newsize, (unsigned int)*size);
+ "End of chunk is beyond the end of the buffer.");
return JB_ERR_PARSE;
}
- newsize += chunksize;
- from_p += 2;
memmove(to_p, from_p, (size_t) chunksize);
+ newsize += chunksize;
to_p = buffer + newsize;
- from_p += chunksize + 2;
+ from_p += chunksize;
+ /*
+ * Not merging this check with the previous one allows us
+ * to keep chunks without trailing CRLF. It's not clear
+ * if we actually have to care about those, though.
+ */
+ if (from_p + 2 >= end_of_buffer)
+ {
+ log_error(LOG_LEVEL_ERROR, "Not enough room for trailing CRLF.");
+ return JB_ERR_PARSE;
+ }
+ from_p += 2;
if (sscanf(from_p, "%x", &chunksize) != 1)
{
log_error(LOG_LEVEL_INFO, "Invalid \"chunked\" transfer encoding detected and ignored.");
return;
}
+#ifdef FEATURE_CLIENT_TAGS
+ apply_url_actions(csp->action, http, csp->client_tags, b);
+#else
apply_url_actions(csp->action, http, b);
+#endif
}
return;
}
-
/*********************************************************************
*
* Function : apply_url_actions
* Parameters :
* 1 : action = Destination.
* 2 : http = Current URL
- * 3 : b = list of URL actions to apply
+ * 3 : client_tags = list of client tags
+ * 4 : b = list of URL actions to apply
*
* Returns : N/A
*
*********************************************************************/
-void apply_url_actions(struct current_action_spec *action,
- struct http_request *http,
- struct url_actions *b)
+static void apply_url_actions(struct current_action_spec *action,
+ struct http_request *http,
+#ifdef FEATURE_CLIENT_TAGS
+ const struct list *client_tags,
+#endif
+ struct url_actions *b)
{
if (b == NULL)
{
{
merge_current_action(action, b->action);
}
+#ifdef FEATURE_CLIENT_TAGS
+ if (client_tag_match(b->url, client_tags))
+ {
+ merge_current_action(action, b->action);
+ }
+#endif
}
}
* the lifetime of this request. Save its location
* in csp as well, so sweep() can free it later on.
*/
- fwd = csp->fwd = zalloc(sizeof(*fwd));
- if (NULL == fwd)
- {
- log_error(LOG_LEVEL_FATAL,
- "can't allocate memory for forward-override{%s}", forward_override_line);
- /* Never get here - LOG_LEVEL_FATAL causes program exit */
- return NULL;
- }
+ fwd = csp->fwd = zalloc_or_die(sizeof(*fwd));
vec_count = ssplit(forward_settings, " \t", vec, SZ(vec));
if ((vec_count == 2) && !strcasecmp(vec[0], "forward"))
/* Parse the parent HTTP proxy host:port */
http_parent = vec[1];
+ }
+ else if ((vec_count == 2) && !strcasecmp(vec[0], "forward-webserver"))
+ {
+ fwd->type = FORWARD_WEBSERVER;
+
+ /* Parse the parent HTTP server host:port */
+ http_parent = vec[1];
+
}
else if (vec_count == 3)
{
projects / privoxy.git / blobdiff