* Purpose : Main file. Contains main() method, main loop, and
* the main connection-handling function.
*
- * Copyright : Written by and Copyright (C) 2001-2021 the
+ * Copyright : Written by and Copyright (C) 2001-2022 the
* Privoxy team. https://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
#ifdef FEATURE_STATISTICS
int urls_read = 0; /* total nr of urls read inc rejected */
int urls_rejected = 0; /* total nr of urls rejected */
+#ifdef MUTEX_LOCKS_AVAILABLE
+unsigned long long number_of_requests_received = 0;
+unsigned long long number_of_requests_blocked = 0;
+#endif
#endif /* def FEATURE_STATISTICS */
#ifdef FEATURE_GRACEFUL_TERMINATION
#ifdef FEATURE_CLIENT_TAGS
privoxy_mutex_t client_tags_mutex;
#endif
+#ifdef FEATURE_STATISTICS
+privoxy_mutex_t block_statistics_mutex;
+#endif
#ifdef FEATURE_EXTENDED_STATISTICS
privoxy_mutex_t filter_statistics_mutex;
-privoxy_mutex_t block_statistics_mutex;
+privoxy_mutex_t block_reason_statistics_mutex;
#endif
#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
"Connection: close\r\n\r\n"
"Failed parsing or buffering the chunk-encoded client body.\n";
+static const char CLIENT_BODY_BUFFER_ERROR_RESPONSE[] =
+ "HTTP/1.1 400 Failed reading client body\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Failed to buffer the client body to apply content filters.\n"
+ "Could be caused by a socket timeout\n";
+
static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
"HTTP/1.1 417 Expecting too much\r\n"
"Content-Type: text/plain\r\n"
#ifdef FEATURE_STATISTICS
if (c->flags & CF_COUNT_AS_REJECT)
{
+#ifdef MUTEX_LOCKS_AVAILABLE
+ privoxy_mutex_lock(&block_statistics_mutex);
+ number_of_requests_blocked++;
+ privoxy_mutex_unlock(&block_statistics_mutex);
+#endif
csp->flags |= CSP_FLAG_REJECTED;
}
#endif /* def FEATURE_STATISTICS */
free_http_request(http);
return JB_ERR_PARSE;
}
+ if (http->ssl && strcmpic(http->gpc, "CONNECT"))
+ {
+ write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
+ get_write_delay(csp));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0",
+ csp->ip_addr_str);
+ log_error(LOG_LEVEL_ERROR, "Client %s tried to send a https "
+ "URL without sending a CONNECT request first",
+ csp->ip_addr_str);
+ free_http_request(http);
+ return JB_ERR_PARSE;
+ }
/* grab the rest of the client's headers */
init_list(headers);
if (!data_is_available(csp->cfd, csp->config->socket_timeout))
{
log_error(LOG_LEVEL_ERROR,
- "Stopped grabbing the client headers.");
+ "Client headers did not arrive in time. Timeout: %d",
+ csp->config->socket_timeout);
destroy_list(headers);
return JB_ERR_PARSE;
}
/*********************************************************************
*
- * Function : can_filter_request_body
+ * Function : can_buffer_request_body
*
* Description : Checks if the current request body can be stored in
* the client_iob without hitting buffer limit.
* FALSE otherwise.
*
*********************************************************************/
-static int can_filter_request_body(const struct client_state *csp)
+static int can_buffer_request_body(const struct client_state *csp)
{
if (!can_add_to_iob(csp->client_iob, csp->config->buffer_limit,
csp->expected_client_content_length))
{
log_error(LOG_LEVEL_INFO,
"Not filtering request body from %s: buffer limit %lu will be exceeded "
- "(content length %lluu)", csp->ip_addr_str, csp->config->buffer_limit,
+ "(content length %llu)", csp->ip_addr_str, csp->config->buffer_limit,
csp->expected_client_content_length);
return FALSE;
}
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : 0 on success, anything else is an error.
+ * Returns : 0 on success, 1 on error, 2 if the request got crunched.
*
*********************************************************************/
static int send_http_request(struct client_state *csp)
{
char *hdr;
int write_failure;
- const char *to_send;
- size_t to_send_len;
- int filter_client_body = csp->expected_client_content_length != 0 &&
- client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
-
- if (filter_client_body)
- {
- if (read_http_request_body(csp))
- {
- return 1;
- }
- to_send_len = csp->expected_client_content_length;
- to_send = execute_client_body_filters(csp, &to_send_len);
- if (to_send == NULL)
- {
- /* just flush client_iob */
- filter_client_body = FALSE;
- }
- else if (to_send_len != csp->expected_client_content_length &&
- update_client_headers(csp, to_send_len))
- {
- log_error(LOG_LEVEL_HEADER, "Error updating client headers");
- return 1;
- }
- csp->expected_client_content_length = 0;
- }
hdr = list_to_text(csp->headers);
if (hdr == NULL)
return 1;
}
- if (filter_client_body)
- {
- write_failure = 0 != write_socket(csp->server_connection.sfd, to_send, to_send_len);
- freez(to_send);
- if (write_failure)
- {
- log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s: %E",
- csp->http->hostport);
- return 1;
- }
- }
-
+ /* XXX: Filtered data is not sent if there's a pipelined request? */
if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
&& (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
{
size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
log_error(LOG_LEVEL_CONNECT,
- "Waiting for up to %lu bytes of request body from the client.",
+ "Buffering encrypted client body. Prepared to read up to %lu bytes.",
max_bytes_to_read);
len = ssl_recv_data(&(csp->ssl_client_attr), buf,
(unsigned)max_bytes_to_read);
if (len <= 0)
{
- log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s", csp->ip_addr_str);
+ log_error(LOG_LEVEL_CONNECT,
+ "Did not receive the whole encrypted request body from %s",
+ csp->ip_addr_str);
return 1;
}
if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
if (to_read != 0)
{
log_error(LOG_LEVEL_CONNECT,
- "Not enough request body has been read: expected %lu more bytes",
+ "Not enough encrypted request body has been read: expected %lu more bytes",
to_read);
return 1;
}
log_error(LOG_LEVEL_CONNECT,
- "The last %llu bytes of the request body have been read",
+ "The last %llu bytes of the encrypted request body have been read",
csp->expected_client_content_length);
return 0;
}
{
int content_length_known = csp->expected_client_content_length != 0;
- while (is_ssl_pending(&(csp->ssl_client_attr))
- || (content_length_known && csp->expected_client_content_length != 0))
+ while ((content_length_known && csp->expected_client_content_length != 0) ||
+ (is_ssl_pending(&(csp->ssl_client_attr)) ||
+ data_is_available(csp->cfd, csp->config->socket_timeout)))
{
unsigned char buf[BUFFER_SIZE];
int len;
max_bytes_to_read = (int)csp->expected_client_content_length;
}
log_error(LOG_LEVEL_CONNECT,
- "Waiting for up to %d bytes of request body from the client.",
+ "Prepared to read up to %d bytes of encrypted request body from the client.",
max_bytes_to_read);
len = ssl_recv_data(&(csp->ssl_client_attr), buf,
(unsigned)max_bytes_to_read);
char *hdr;
int ret;
long flushed = 0;
- const char *to_send;
- size_t to_send_len;
- int filter_client_body = csp->expected_client_content_length != 0 &&
- client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
-
- if (filter_client_body)
- {
- if (read_https_request_body(csp))
- {
- return 1;
- }
- to_send_len = csp->expected_client_content_length;
- to_send = execute_client_body_filters(csp, &to_send_len);
- if (to_send == NULL)
- {
- /* just flush client_iob */
- filter_client_body = FALSE;
- }
- else if (to_send_len != csp->expected_client_content_length &&
- update_client_headers(csp, to_send_len))
- {
- log_error(LOG_LEVEL_HEADER, "Error updating client headers");
- return 1;
- }
- csp->expected_client_content_length = 0;
- }
hdr = list_to_text(csp->https_headers);
if (hdr == NULL)
return 1;
}
- if (filter_client_body)
- {
- ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
- freez(to_send);
- if (ret < 0)
- {
- log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
- csp->http->hostport);
- return 1;
- }
- }
-
+ /* XXX: Client body isn't sent if there's pipelined data? */
if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
&& ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
csp->client_iob)) < 0))
"Failed to get the encrypted request destination");
ssl_send_data_delayed(&(csp->ssl_client_attr),
(const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
+ destroy_list(headers);
+
return JB_ERR_PARSE;
}
return;
}
+#if defined(FEATURE_STATISTICS) && defined(MUTEX_LOCKS_AVAILABLE)
+ privoxy_mutex_lock(&block_statistics_mutex);
+ number_of_requests_received++;
+ privoxy_mutex_unlock(&block_statistics_mutex);
+#endif
+
csp->requests_received_total++;
/*
}
assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
+ if (csp->expected_client_content_length != 0 &&
+ (client_body_filters_enabled(csp->action) ||
+ client_body_taggers_enabled(csp->action)) &&
+ can_buffer_request_body(csp))
+ {
+ int content_modified;
+
+ if (read_https_request_body(csp))
+ {
+ /* XXX: handle */
+ return;
+ }
+ if (client_body_taggers_enabled(csp->action))
+ {
+ execute_client_body_taggers(csp, csp->expected_client_content_length);
+ if (crunch_response_triggered(csp, crunchers_all))
+ {
+ /*
+ * Yes. The client got the crunch response and we're done here.
+ */
+ return;
+ }
+ }
+ if (client_body_filters_enabled(csp->action))
+ {
+ size_t modified_content_length = csp->expected_client_content_length;
+ content_modified = execute_client_body_filters(csp,
+ &modified_content_length);
+ if ((content_modified == 1) &&
+ (modified_content_length != csp->expected_client_content_length) &&
+ update_client_headers(csp, modified_content_length))
+ {
+ /* XXX: Send error response */
+ log_error(LOG_LEVEL_HEADER, "Error updating client headers");
+ return;
+ }
+ }
+ csp->expected_client_content_length = 0;
+ }
+
fwd = forward_url(csp, csp->http);
if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
{
*/
goto server_wants_to_talk;
}
+ if (watch_client_socket && client_use_ssl(csp) &&
+ is_ssl_pending(&(csp->ssl_client_attr)))
+ {
+ /*
+ * The TLS libray may also consume all of the remaining data
+ * from the client when we're shuffling the data from an
+ * unbuffered request body to the server.
+ */
+ goto client_wants_to_talk;
+ }
#endif
#ifndef HAVE_POLL
FD_ZERO(&rfds);
if (FD_ISSET(csp->cfd, &rfds))
#endif /* def HAVE_POLL*/
{
- int max_bytes_to_read = (int)csp->receive_buffer_size;
+ int max_bytes_to_read;
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ client_wants_to_talk:
+#endif
+
+ max_bytes_to_read = (int)csp->receive_buffer_size;
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
{
return;
}
+
+#if defined(FEATURE_STATISTICS) && defined(MUTEX_LOCKS_AVAILABLE)
+ privoxy_mutex_lock(&block_statistics_mutex);
+ number_of_requests_received++;
+ privoxy_mutex_unlock(&block_statistics_mutex);
+#endif
+
if (parse_client_request(csp) != JB_ERR_OK)
{
return;
}
#endif
+ /* If we need to apply client body filters, buffer the whole request now. */
+ if (csp->expected_client_content_length != 0 &&
+ (client_body_filters_enabled(csp->action) ||
+ client_body_taggers_enabled(csp->action)) &&
+ can_buffer_request_body(csp))
+ {
+ int content_modified;
+ size_t modified_content_length;
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ if (client_use_ssl(csp) && read_https_request_body(csp))
+ {
+ log_error(LOG_LEVEL_ERROR, "Failed to buffer the encrypted "
+ "request body to apply filters or taggers.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, csp->http->cmd);
+
+ ssl_send_data_delayed(&(csp->ssl_client_attr),
+ (const unsigned char *)CLIENT_BODY_BUFFER_ERROR_RESPONSE,
+ strlen(CLIENT_BODY_BUFFER_ERROR_RESPONSE),
+ get_write_delay(csp));
+
+ return;
+ }
+ else
+#endif
+ if (read_http_request_body(csp))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Failed to buffer the request body to apply filters or taggers,");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, csp->http->cmd);
+
+ write_socket_delayed(csp->cfd, CLIENT_BODY_BUFFER_ERROR_RESPONSE,
+ strlen(CLIENT_BODY_BUFFER_ERROR_RESPONSE), get_write_delay(csp));
+
+ return;
+ }
+ if (client_body_taggers_enabled(csp->action))
+ {
+ execute_client_body_taggers(csp, csp->expected_client_content_length);
+ if (crunch_response_triggered(csp, crunchers_all))
+ {
+ /*
+ * Yes. The client got the crunch response and we're done here.
+ */
+ return;
+ }
+ }
+ if (client_body_filters_enabled(csp->action))
+ {
+ modified_content_length = csp->expected_client_content_length;
+ content_modified = execute_client_body_filters(csp,
+ &modified_content_length);
+ if ((content_modified == 1) &&
+ (modified_content_length != csp->expected_client_content_length) &&
+ update_client_headers(csp, modified_content_length))
+ {
+ /* XXX: Send error response */
+ log_error(LOG_LEVEL_HEADER, "Error updating client headers");
+ return;
+ }
+ }
+ csp->expected_client_content_length = 0;
+ }
+
log_applied_actions(csp->action);
/* decide how to route the HTTP request */
#endif
))
{
- if (send_http_request(csp))
+ int status = send_http_request(csp);
+ if (status == 2)
+ {
+ /* The request got crunched, a response has been delivered. */
+ return;
+ }
+ if (status != 0)
{
rsp = error_response(csp, "connect-failed");
if (rsp)
#ifdef FEATURE_CLIENT_TAGS
privoxy_mutex_init(&client_tags_mutex);
#endif
+#ifdef FEATURE_STATISTICS
+ privoxy_mutex_init(&block_statistics_mutex);
+#endif
#ifdef FEATURE_EXTENDED_STATISTICS
privoxy_mutex_init(&filter_statistics_mutex);
- privoxy_mutex_init(&block_statistics_mutex);
+ privoxy_mutex_init(&block_reason_statistics_mutex);
#endif
/*
log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
+ close_ports_helper(bfds);
+
unload_current_config_file();
unload_current_actions_file();
unload_current_re_filterfile();
projects / privoxy.git / blobdiff