-const char jcc_rcs[] = "$Id: jcc.c,v 1.351 2011/05/03 10:15:54 fabiankeil Exp $";
+const char jcc_rcs[] = "$Id: jcc.c,v 1.450 2016/12/24 16:01:32 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
* Purpose : Main file. Contains main() method, main loop, and
* the main connection-handling function.
*
- * Copyright : Written by and Copyright (C) 2001-2010 the
+ * Copyright : Written by and Copyright (C) 2001-2016 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
# ifndef STRICT
# define STRICT
# endif
+# include <winsock2.h>
# include <windows.h>
# include <process.h>
# endif /* ndef FEATURE_PTHREAD */
#include "cgi.h"
#include "loadcfg.h"
#include "urlmatch.h"
+#ifdef FEATURE_CLIENT_TAGS
+#include "client-tags.h"
+#endif
const char jcc_h_rcs[] = JCC_H_VERSION;
const char project_h_rcs[] = PROJECT_H_VERSION;
static void usage(const char *myname);
#endif
static void initialize_mutexes(void);
-static jb_socket bind_port_helper(struct configuration_spec *config);
+static jb_socket bind_port_helper(const char *haddr, int hport);
+static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
+static void close_ports_helper(jb_socket sockets[]);
static void listen_loop(void);
#ifdef AMIGA
#define sleep(N) DosSleep(((N) * 100))
#endif
+#ifdef FUZZ
+int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
+void show_fuzz_usage(const char *name);
+#endif
+
#ifdef MUTEX_LOCKS_AVAILABLE
/*
* XXX: Does the locking stuff really belong in this file?
privoxy_mutex_t log_init_mutex;
privoxy_mutex_t connection_reuse_mutex;
+#ifdef FEATURE_EXTERNAL_FILTERS
+privoxy_mutex_t external_filter_mutex;
+#endif
+#ifdef FEATURE_CLIENT_TAGS
+privoxy_mutex_t client_tags_mutex;
+#endif
+
#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
privoxy_mutex_t resolver_mutex;
#endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
/* HTTP snipplets. */
static const char CSUCCEED[] =
- "HTTP/1.0 200 Connection established\r\n"
- "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
+ "HTTP/1.1 200 Connection established\r\n\r\n";
static const char CHEADER[] =
- "HTTP/1.0 400 Invalid header received from client\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 400 Invalid header received from client\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Invalid header received from client.\r\n";
static const char FTP_RESPONSE[] =
- "HTTP/1.0 400 Invalid request received from client\r\n"
+ "HTTP/1.1 400 Invalid request received from client\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Invalid request. Privoxy doesn't support FTP.\r\n";
static const char GOPHER_RESPONSE[] =
- "HTTP/1.0 400 Invalid request received from client\r\n"
+ "HTTP/1.1 400 Invalid request received from client\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Invalid request. Privoxy doesn't support gopher.\r\n";
/* XXX: should be a template */
static const char MISSING_DESTINATION_RESPONSE[] =
- "HTTP/1.0 400 Bad request received from client\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 400 Bad request received from client\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Bad request. Privoxy was unable to extract the destination.\r\n";
/* XXX: should be a template */
static const char INVALID_SERVER_HEADERS_RESPONSE[] =
- "HTTP/1.0 502 Server or forwarder response invalid\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 502 Server or forwarder response invalid\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
/* XXX: should be a template */
static const char MESSED_UP_REQUEST_RESPONSE[] =
- "HTTP/1.0 400 Malformed request after rewriting\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 400 Malformed request after rewriting\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Bad request. Messed up with header filters.\r\n";
static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
- "HTTP/1.0 503 Too many open connections\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 503 Too many open connections\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Maximum number of open connections reached.\r\n";
static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
- "HTTP/1.0 504 Connection timeout\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 504 Connection timeout\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"The connection timed out because the client request didn't arrive in time.\r\n";
+static const char CLIENT_BODY_PARSE_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 parsing or buffering the chunk-encoded client body.\r\n";
+
+static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
+ "HTTP/1.1 417 Expecting too much\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Privoxy detected an unsupported Expect header value.\r\n";
+
/* A function to crunch a response */
typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
/*********************************************************************
*
- * Function : sig_handler
+ * Function : sig_handler
*
* Description : Signal handler for different signals.
* Exit gracefully on TERM and INT
* Parameters :
* 1 : the_signal = the signal cause this function to call
*
- * Returns : -
+ * Returns : -
*
*********************************************************************/
static void sig_handler(int the_signal)
case SIGINT:
log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
#if defined(unix)
- if(pidfile)
+ if (pidfile)
{
unlink(pidfile);
}
#if defined(unix)
received_hup_signal = 1;
#endif
- break;
+ break;
default:
- /*
+ /*
* We shouldn't be here, unless we catch signals
* in main() that we can't handle here!
*/
}
+/*********************************************************************
+ *
+ * Function : client_has_unsupported_expectations
+ *
+ * Description : Checks if the client used an unsupported expectation
+ * in which case an error message is delivered.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : TRUE if an error response has been generated, or
+ * FALSE if the request doesn't look invalid.
+ *
+ *********************************************************************/
+static int client_has_unsupported_expectations(const struct client_state *csp)
+{
+ if ((csp->flags & CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Rejecting request from client %s with unsupported Expect header value",
+ csp->ip_addr_str);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 417 0", csp->ip_addr_str, csp->http->cmd);
+ write_socket(csp->cfd, UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
+ strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE));
+
+ return TRUE;
+ }
+
+ return FALSE;
+
+}
+
+
/*********************************************************************
*
* Function : get_request_destination_elsewhere
log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
continue_hack_in_da_house = 1;
}
- else if (*header == '\0')
+ else if (*header == '\0')
{
/*
* If the header is empty, but the Continue hack
}
+/*********************************************************************
+ *
+ * Function : log_applied_actions
+ *
+ * Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
+ * enabled.
+ *
+ * Parameters :
+ * 1 : actions = Current action spec to log
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void log_applied_actions(const struct current_action_spec *actions)
+{
+ /*
+ * The conversion to text requires lots of memory allocations so
+ * we only do the conversion if the user is actually interested.
+ */
+ if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
+ {
+ char *actions_as_text = actions_to_line_of_text(actions);
+ log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
+ freez(actions_as_text);
+ }
+}
+
+
/*********************************************************************
*
* Function : send_crunch_response
status_code[3] = '\0';
/* Log that the request was crunched and why. */
+ log_applied_actions(csp->action);
log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
if (cgi_error_memory() != rsp)
{
free_http_response(rsp);
- }
+ }
return;
}
/*
* If CGI request crunching is disabled,
* check the CGI dispatcher out of order to
- * prevent unintentional blocks or redirects.
+ * prevent unintentional blocks or redirects.
*/
if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
&& (NULL != (rsp = dispatch_cgi(csp))))
* Downgrade http version from 1.1 to 1.0
* if +downgrade action applies.
*/
- if ( (csp->action->flags & ACTION_DOWNGRADE)
+ if ((csp->action->flags & ACTION_DOWNGRADE)
&& (!strcmpic(http->ver, "HTTP/1.1")))
{
freez(http->ver);
- http->ver = strdup("HTTP/1.0");
-
- if (http->ver == NULL)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
- }
+ http->ver = strdup_or_die("HTTP/1.0");
}
/*
*request_line = strdup(http->gpc);
string_append(request_line, " ");
- if (fwd->forward_host)
+ if (fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
{
string_append(request_line, http->url);
}
struct http_request *http = csp->http;
jb_err err;
- log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
+ log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
+ csp->headers->first->str);
free_http_request(http);
err = parse_http_request(csp->headers->first->str, http);
if (JB_ERR_OK != err)
log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
jb_err_to_string(err));
}
- else
- {
- /* XXX: ocmd is a misleading name */
- http->ocmd = strdup(http->cmd);
- if (http->ocmd == NULL)
- {
- log_error(LOG_LEVEL_FATAL,
- "Out of memory copying rewritten HTTP request line");
- }
- }
return err;
}
*/
csp->expected_content_length = 0;
content_length_known = TRUE;
+ csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
}
if (csp->http->status == 204 || csp->http->status == 304)
*/
csp->expected_content_length = 0;
content_length_known = TRUE;
+ csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
}
return (content_length_known && ((0 == csp->expected_content_length)
assert(NULL != http->host);
server_connection->sfd = sfd;
- server_connection->host = strdup(http->host);
- if (NULL == server_connection->host)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory saving socket.");
- }
+ server_connection->host = strdup_or_die(http->host);
server_connection->port = http->port;
assert(NULL != fwd);
server_connection->forwarder_type = fwd->type;
if (NULL != fwd->gateway_host)
{
- server_connection->gateway_host = strdup(fwd->gateway_host);
- if (NULL == server_connection->gateway_host)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory saving gateway_host.");
- }
+ server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
}
else
{
if (NULL != fwd->forward_host)
{
- server_connection->forward_host = strdup(fwd->forward_host);
- if (NULL == server_connection->forward_host)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory saving forward_host.");
- }
+ server_connection->forward_host = strdup_or_die(fwd->forward_host);
}
else
{
* we do.
*
* Data that doesn't belong to the current request is
- * thrown away to let the client retry on a clean socket.
- *
- * XXX: This is a hack until we can deal with multiple
- * pipelined requests at the same time.
- *
+ * either thrown away to let the client retry on a clean
+ * socket, or stashed to be dealt with after the current
+ * request is served.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
static void verify_request_length(struct client_state *csp)
{
unsigned long long buffered_request_bytes =
- (unsigned long long)(csp->iob->eod - csp->iob->cur);
+ (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
if ((csp->expected_client_content_length != 0)
&& (buffered_request_bytes != 0))
}
else
{
- assert(csp->iob->eod > csp->iob->cur + csp->expected_client_content_length);
- csp->iob->eod = csp->iob->cur + csp->expected_client_content_length;
+ assert(csp->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
+ csp->client_iob->eod = csp->client_iob->cur + csp->expected_client_content_length;
log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
"Marking the server socket tainted after throwing %llu bytes away.",
buffered_request_bytes - csp->expected_client_content_length);
}
if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
- && ((csp->iob->cur[0] != '\0') || (csp->expected_client_content_length != 0)))
+ && ((csp->client_iob->cur < csp->client_iob->eod)
+ || (csp->expected_client_content_length != 0)))
{
- csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
if (strcmpic(csp->http->gpc, "GET")
&& strcmpic(csp->http->gpc, "HEAD")
&& strcmpic(csp->http->gpc, "TRACE")
{
/* XXX: this is an incomplete hack */
csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
- log_error(LOG_LEVEL_CONNECT,
- "There might be a request body. The connection will not be kept alive.");
+ log_error(LOG_LEVEL_CONNECT, "There better be a request body.");
}
else
{
- /* XXX: and so is this */
csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
- log_error(LOG_LEVEL_CONNECT,
- "Possible pipeline attempt detected. The connection will not "
- "be kept alive and we will only serve the first request.");
- /* Nuke the pipelined requests from orbit, just to be sure. */
- csp->iob->buf[0] = '\0';
- csp->iob->eod = csp->iob->cur = csp->iob->buf;
+
+ if ((csp->config->feature_flags & RUNTIME_FEATURE_TOLERATE_PIPELINING) == 0)
+ {
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ log_error(LOG_LEVEL_CONNECT,
+ "Possible pipeline attempt detected. The connection will not "
+ "be kept alive and we will only serve the first request.");
+ /* Nuke the pipelined requests from orbit, just to be sure. */
+ clear_iob(csp->client_iob);
+ }
+ else
+ {
+ /*
+ * Keep the pipelined data around for now, we'll deal with
+ * it once we're done serving the current request.
+ */
+ csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
+ assert(csp->client_iob->eod >= csp->client_iob->cur);
+ log_error(LOG_LEVEL_CONNECT, "Complete client request followed by "
+ "%d bytes of pipelined data received.",
+ (int)(csp->client_iob->eod - csp->client_iob->cur));
+ }
}
}
else
* actually been reused.
*/
if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
- && !(csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED))
+ && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
{
log_error(LOG_LEVEL_CONNECT,
"Marking the server socket %d tainted.",
memset(buf, 0, sizeof(buf));
+ if ((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
+ {
+ /*
+ * If there are multiple pipelined requests waiting,
+ * the flag will be set again once the next request
+ * has been parsed.
+ */
+ csp->flags &= ~CSP_FLAG_PIPELINED_REQUEST_WAITING;
+
+ request_line = get_header(csp->client_iob);
+ if ((NULL != request_line) && ('\0' != *request_line))
+ {
+ return request_line;
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT, "No complete request line "
+ "received yet. Continuing reading from %d.", csp->cfd);
+ }
+ }
+
do
{
- if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ if (
+#ifdef FUZZ
+ 0 == (csp->flags & CSP_FLAG_FUZZED_INPUT) &&
+#endif
+ !data_is_available(csp->cfd, csp->config->socket_timeout)
+ )
{
- log_error(LOG_LEVEL_CONNECT,
- "Stopped waiting for the request line. Timeout: %d.",
- csp->config->socket_timeout);
- write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
- strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
+ if (socket_is_still_alive(csp->cfd))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "No request line on socket %d received in time. Timeout: %d.",
+ csp->cfd, csp->config->socket_timeout);
+ write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
+ strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "The client side of the connection on socket %d got "
+ "closed without sending a complete request line.", csp->cfd);
+ }
return NULL;
}
* If there is no memory left for buffering the
* request, there is nothing we can do but hang up
*/
- if (add_to_iob(csp, buf, len))
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
{
return NULL;
}
- request_line = get_header(csp->iob);
+ request_line = get_header(csp->client_iob);
} while ((NULL != request_line) && ('\0' == *request_line));
}
+enum chunk_status
+{
+ CHUNK_STATUS_MISSING_DATA,
+ CHUNK_STATUS_BODY_COMPLETE,
+ CHUNK_STATUS_PARSE_ERROR
+};
+
/*********************************************************************
*
- * Function : receive_client_request
+ * Function : chunked_body_is_complete
*
- * Description : Read the client's request (more precisely the
- * client headers) and answer it if necessary.
+ * Description : Figures out whether or not a chunked body is complete.
*
- * Note that since we're not using select() we could get
- * blocked here if a client connected, then didn't say
- * anything!
+ * Currently it always starts at the beginning of the
+ * buffer which is somewhat wasteful and prevents Privoxy
+ * from starting to forward the correctly parsed chunks
+ * as soon as theoretically possible.
+ *
+ * Should be modified to work with a common buffer,
+ * and allow the caller to skip already parsed chunks.
+ *
+ * This would allow the function to be used for unbuffered
+ * response bodies as well.
*
* Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : iob = Buffer with the body to check.
+ * 2 : length = Length of complete body
*
- * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
+ * Returns : Enum with the result of the check.
*
*********************************************************************/
-static jb_err receive_client_request(struct client_state *csp)
+static enum chunk_status chunked_body_is_complete(struct iob *iob, size_t *length)
{
- char buf[BUFFER_SIZE];
- char *p;
- char *req = NULL;
- struct http_request *http;
- int len;
- jb_err err;
-
- /* Temporary copy of the client's headers before they get enlisted in csp->headers */
- struct list header_list;
- struct list *headers = &header_list;
-
- http = csp->http;
+ unsigned int chunksize;
+ char *p = iob->cur;
- memset(buf, 0, sizeof(buf));
-
- req = get_request_line(csp);
- if (req == NULL)
+ do
{
- mark_server_socket_tainted(csp);
- return JB_ERR_PARSE;
- }
- assert(*req != '\0');
+ /*
+ * We need at least a single digit, followed by "\r\n",
+ * followed by an unknown amount of data, followed by "\r\n".
+ */
+ if (p + 5 > iob->eod)
+ {
+ return CHUNK_STATUS_MISSING_DATA;
+ }
+ if (sscanf(p, "%x", &chunksize) != 1)
+ {
+ return CHUNK_STATUS_PARSE_ERROR;
+ }
- if (client_protocol_is_unsupported(csp, req))
- {
- return JB_ERR_PARSE;
- }
+ /*
+ * We want at least a single digit, followed by "\r\n",
+ * followed by the specified amount of data, followed by "\r\n".
+ */
+ if (p + chunksize + 5 > iob->eod)
+ {
+ return CHUNK_STATUS_MISSING_DATA;
+ }
-#ifdef FEATURE_FORCE_LOAD
- /*
- * If this request contains the FORCE_PREFIX and blocks
- * aren't enforced, get rid of it and set the force flag.
- */
- if (strstr(req, FORCE_PREFIX))
- {
- if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
+ /* Skip chunk-size. */
+ p = strstr(p, "\r\n");
+ if (NULL == p)
{
- log_error(LOG_LEVEL_FORCE,
- "Ignored force prefix in request: \"%s\".", req);
+ return CHUNK_STATUS_PARSE_ERROR;
}
- else
+ /* Move beyond the chunkdata. */
+ p += 2 + chunksize;
+
+ /* There should be another "\r\n" to skip */
+ if (memcmp(p, "\r\n", 2))
{
- strclean(req, FORCE_PREFIX);
- log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
- csp->flags |= CSP_FLAG_FORCED;
+ return CHUNK_STATUS_PARSE_ERROR;
}
- }
-#endif /* def FEATURE_FORCE_LOAD */
+ p += 2;
+ } while (chunksize > 0U);
- err = parse_http_request(req, http);
- freez(req);
- if (JB_ERR_OK != err)
- {
- write_socket(csp->cfd, CHEADER, strlen(CHEADER));
- /* XXX: Use correct size */
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
- log_error(LOG_LEVEL_ERROR,
- "Couldn't parse request line received from %s: %s",
- csp->ip_addr_str, jb_err_to_string(err));
+ *length = (size_t)(p - iob->cur);
+ assert(*length <= (size_t)(iob->eod - iob->cur));
+ assert(p <= iob->eod);
- free_http_request(http);
- return JB_ERR_PARSE;
- }
+ return CHUNK_STATUS_BODY_COMPLETE;
- /* grab the rest of the client's headers */
- init_list(headers);
- for (;;)
+}
+
+
+/*********************************************************************
+ *
+ * Function : receive_chunked_client_request_body
+ *
+ * Description : Read the chunk-encoded client request body.
+ * Failures are dealt with.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK or JB_ERR_PARSE
+ *
+ *********************************************************************/
+static jb_err receive_chunked_client_request_body(struct client_state *csp)
+{
+ size_t body_length;
+ enum chunk_status status;
+
+ while (CHUNK_STATUS_MISSING_DATA ==
+ (status = chunked_body_is_complete(csp->client_iob,&body_length)))
{
- p = get_header(csp->iob);
+ char buf[BUFFER_SIZE];
+ int len;
- if (p == NULL)
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
{
- /* There are no additional headers to read. */
+ log_error(LOG_LEVEL_ERROR,
+ "Timeout while waiting for the client body.");
break;
}
-
- if (*p == '\0')
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+ if (len <= 0)
{
- /*
- * We didn't receive a complete header
- * line yet, get the rest of it.
- */
- if (!data_is_available(csp->cfd, csp->config->socket_timeout))
- {
- log_error(LOG_LEVEL_ERROR,
- "Stopped grabbing the client headers.");
- destroy_list(headers);
- return JB_ERR_PARSE;
- }
-
- len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
- if (len <= 0)
- {
- log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
- destroy_list(headers);
- return JB_ERR_PARSE;
- }
-
- if (add_to_iob(csp, buf, len))
- {
- /*
- * If there is no memory left for buffering the
- * request, there is nothing we can do but hang up
- */
- destroy_list(headers);
- return JB_ERR_MEMORY;
- }
+ log_error(LOG_LEVEL_ERROR, "Read the client body failed: %E");
+ break;
}
- else
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
{
- /*
- * We were able to read a complete
- * header and can finally enlist it.
- */
- enlist(headers, p);
- freez(p);
+ break;
}
}
-
- if (http->host == NULL)
+ if (status != CHUNK_STATUS_BODY_COMPLETE)
{
- /*
- * If we still don't know the request destination,
- * the request is invalid or the client uses
- * Privoxy without its knowledge.
- */
- if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
- {
- /*
- * Our attempts to get the request destination
- * elsewhere failed or Privoxy is configured
- * to only accept proxy requests.
- *
- * An error response has already been send
- * and we're done here.
- */
- return JB_ERR_PARSE;
+ write_socket(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
+ strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE));
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
+ return JB_ERR_PARSE;
+ }
+ log_error(LOG_LEVEL_CONNECT,
+ "Chunked client body completely read. Length: %d", body_length);
+ csp->expected_client_content_length = body_length;
+
+ return JB_ERR_OK;
+
+}
+
+
+#ifdef FUZZ
+/*********************************************************************
+ *
+ * Function : fuzz_chunked_transfer_encoding
+ *
+ * Description : Treat the fuzzed input as chunked transfer encoding
+ * to check and dechunk.
+ *
+ * Parameters :
+ * 1 : csp = Used to store the data.
+ * 2 : fuzz_input_file = File to read the input from.
+ *
+ * Returns : Result of dechunking
+ *
+ *********************************************************************/
+extern int fuzz_chunked_transfer_encoding(struct client_state *csp, char *fuzz_input_file)
+{
+ size_t length;
+ size_t size = (size_t)(csp->iob->eod - csp->iob->cur);
+ enum chunk_status status;
+
+ status = chunked_body_is_complete(csp->iob, &length);
+ if (CHUNK_STATUS_BODY_COMPLETE != status)
+ {
+ log_error(LOG_LEVEL_INFO, "Chunked body is incomplete or invalid");
+ }
+
+ return (JB_ERR_OK == remove_chunked_transfer_coding(csp->iob->cur, &size));
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : fuzz_client_request
+ *
+ * Description : Try to get a client request from the fuzzed input.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : fuzz_input_file = File to read the input from.
+ *
+ * Returns : Result of fuzzing.
+ *
+ *********************************************************************/
+extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
+{
+ jb_err err;
+
+ csp->cfd = 0;
+ csp->ip_addr_str = "fuzzer";
+
+ if (strcmp(fuzz_input_file, "-") != 0)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Fuzzed client requests can currenty only be read from stdin (-).");
+ }
+ err = receive_client_request(csp);
+ if (err != JB_ERR_OK)
+ {
+ return 1;
+ }
+ err = parse_client_request(csp);
+ if (err != JB_ERR_OK)
+ {
+ return 1;
+ }
+
+ return 0;
+
+}
+#endif /* def FUZZ */
+
+
+#ifdef FEATURE_FORCE_LOAD
+/*********************************************************************
+ *
+ * Function : force_required
+ *
+ * Description : Checks a request line to see if it contains
+ * the FORCE_PREFIX. If it does, it is removed
+ * unless enforcing requests has beend disabled.
+ *
+ * Parameters :
+ * 1 : request_line = HTTP request line
+ *
+ * Returns : TRUE if force is required, FALSE otherwise.
+ *
+ *********************************************************************/
+static int force_required(const struct client_state *csp, char *request_line)
+{
+ char *p;
+
+ p = strstr(request_line, "http://");
+ if (p != NULL)
+ {
+ /* Skip protocol */
+ p += strlen("http://");
+ }
+ else
+ {
+ /* Intercepted request usually don't specify the protocol. */
+ p = request_line;
+ }
+
+ /* Go to the beginning of the path */
+ p = strstr(p, "/");
+ if (p == NULL)
+ {
+ /*
+ * If the path is missing the request line is invalid and we
+ * are done here. The client-visible rejection happens later on.
+ */
+ return 0;
+ }
+
+ if (0 == strncmpic(p, FORCE_PREFIX, strlen(FORCE_PREFIX) - 1))
+ {
+ if (!(csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS))
+ {
+ /* XXX: Should clean more carefully */
+ strclean(request_line, FORCE_PREFIX);
+ log_error(LOG_LEVEL_FORCE,
+ "Enforcing request: \"%s\".", request_line);
+
+ return 1;
}
+ log_error(LOG_LEVEL_FORCE,
+ "Ignored force prefix in request: \"%s\".", request_line);
+ }
+
+ return 0;
+
+}
+#endif /* def FEATURE_FORCE_LOAD */
+
+
+/*********************************************************************
+ *
+ * Function : receive_client_request
+ *
+ * Description : Read the client's request (more precisely the
+ * client headers) and answer it if necessary.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
+ *
+ *********************************************************************/
+static jb_err receive_client_request(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *p;
+ char *req = NULL;
+ struct http_request *http;
+ int len;
+ jb_err err;
+
+ /* Temporary copy of the client's headers before they get enlisted in csp->headers */
+ struct list header_list;
+ struct list *headers = &header_list;
+
+ /* We don't care if the arriving data is a valid HTTP request or not. */
+ csp->requests_received_total++;
+
+ http = csp->http;
+
+ memset(buf, 0, sizeof(buf));
+
+ req = get_request_line(csp);
+ if (req == NULL)
+ {
+ mark_server_socket_tainted(csp);
+ return JB_ERR_PARSE;
}
+ assert(*req != '\0');
+
+ if (client_protocol_is_unsupported(csp, req))
+ {
+ return JB_ERR_PARSE;
+ }
+
+#ifdef FEATURE_FORCE_LOAD
+ if (force_required(csp, req))
+ {
+ csp->flags |= CSP_FLAG_FORCED;
+ }
+#endif /* def FEATURE_FORCE_LOAD */
+
+ err = parse_http_request(req, http);
+ freez(req);
+ if (JB_ERR_OK != err)
+ {
+ write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
+ log_error(LOG_LEVEL_ERROR,
+ "Couldn't parse request line received from %s: %s",
+ csp->ip_addr_str, jb_err_to_string(err));
+
+ free_http_request(http);
+ return JB_ERR_PARSE;
+ }
+
+ /* grab the rest of the client's headers */
+ init_list(headers);
+ for (;;)
+ {
+ p = get_header(csp->client_iob);
+
+ if (p == NULL)
+ {
+ /* There are no additional headers to read. */
+ break;
+ }
+
+ if (*p == '\0')
+ {
+ /*
+ * We didn't receive a complete header
+ * line yet, get the rest of it.
+ */
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Stopped grabbing the client headers.");
+ destroy_list(headers);
+ return JB_ERR_PARSE;
+ }
+
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+ if (len <= 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
+ destroy_list(headers);
+ return JB_ERR_PARSE;
+ }
+
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
+ {
+ /*
+ * If there is no memory left for buffering the
+ * request, there is nothing we can do but hang up
+ */
+ destroy_list(headers);
+ return JB_ERR_MEMORY;
+ }
+ }
+ else
+ {
+ if (!strncmpic(p, "Transfer-Encoding:", 18))
+ {
+ /*
+ * XXX: should be called through sed()
+ * but currently can't.
+ */
+ client_transfer_encoding(csp, &p);
+ }
+ /*
+ * We were able to read a complete
+ * header and can finally enlist it.
+ */
+ enlist(headers, p);
+ freez(p);
+ }
+ }
+
+ if (http->host == NULL)
+ {
+ /*
+ * If we still don't know the request destination,
+ * the request is invalid or the client uses
+ * Privoxy without its knowledge.
+ */
+ if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
+ {
+ /*
+ * Our attempts to get the request destination
+ * elsewhere failed or Privoxy is configured
+ * to only accept proxy requests.
+ *
+ * An error response has already been send
+ * and we're done here.
+ */
+ return JB_ERR_PARSE;
+ }
+ }
+
+#ifdef FEATURE_CLIENT_TAGS
+ /* XXX: If the headers were enlisted sooner, passing csp would do. */
+ set_client_address(csp, headers);
+ get_tag_list_for_client(csp->client_tags, csp->client_address);
+#endif
/*
* Determine the actions for this URL
get_url_actions(csp, http);
}
- /*
- * Save a copy of the original request for logging
- */
- http->ocmd = strdup(http->cmd);
- if (http->ocmd == NULL)
- {
- log_error(LOG_LEVEL_FATAL,
- "Out of memory copying HTTP request line");
- }
enlist(csp->headers, http->cmd);
/* Append the previously read headers */
- list_append_list_unique(csp->headers, headers);
+ err = list_append_list_unique(csp->headers, headers);
destroy_list(headers);
- return JB_ERR_OK;
+ return err;
}
/* Assume persistence until further notice */
csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
}
+
+ if (csp->http->ssl == 0)
+ {
+ /*
+ * This whole block belongs to chat() but currently
+ * has to be executed before sed().
+ */
+ if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
+ {
+ if (receive_chunked_client_request_body(csp) != JB_ERR_OK)
+ {
+ return JB_ERR_PARSE;
+ }
+ }
+ else
+ {
+ csp->expected_client_content_length = get_expected_content_length(csp->headers);
+ }
+ verify_request_length(csp);
+ }
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
err = sed(csp, FILTER_CLIENT_HEADERS);
if (JB_ERR_OK != err)
{
- /* XXX: Should be handled in sed(). */
- assert(err == JB_ERR_PARSE);
- log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
+ log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
+ csp->ip_addr_str);
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->http->cmd);
+ write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ return JB_ERR_PARSE;
}
csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
return JB_ERR_PARSE;
}
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- if (csp->http->ssl == 0)
+ if (client_has_unsupported_expectations(csp))
{
- verify_request_length(csp);
+ return JB_ERR_PARSE;
}
-#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
return JB_ERR_OK;
/*********************************************************************
*
- * Function : chat
+ * Function : send_http_request
*
- * Description : Once a connection from the client has been accepted,
- * this function is called (via serve()) to handle the
- * main business of the communication. This function
- * returns after dealing with a single request. It can
- * be called multiple times with the same client socket
- * if the client is keeping the connection alive.
+ * Description : Sends the HTTP headers from the client request
+ * and all the body data that has already been received.
*
- * The decision whether or not a client connection will
- * be kept alive is up to the caller which also must
- * close the client socket when done.
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
*
- * FIXME: chat is nearly thousand lines long.
- * Ridiculous.
+ * Returns : 0 on success, anything else is na error.
+ *
+ *********************************************************************/
+static int send_http_request(struct client_state *csp)
+{
+ char *hdr;
+ int write_failure;
+
+ hdr = list_to_text(csp->headers);
+ if (hdr == NULL)
+ {
+ /* FIXME Should handle error properly */
+ log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
+ }
+ list_remove_all(csp->headers);
+
+ /*
+ * Write the client's (modified) header to the server
+ * (along with anything else that may be in the buffer)
+ */
+ write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
+ freez(hdr);
+
+ if (write_failure)
+ {
+ log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
+ csp->http->hostport);
+ }
+ else if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
+ && (flush_socket(csp->server_connection.sfd, csp->client_iob) < 0))
+ {
+ write_failure = 1;
+ log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
+ csp->http->hostport);
+ }
+
+ return write_failure;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : handle_established_connection
+ *
+ * Description : Shuffle data between client and server once the
+ * connection has been established.
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
* Returns : Nothing.
*
*********************************************************************/
-static void chat(struct client_state *csp)
+static void handle_established_connection(struct client_state *csp,
+ const struct forward_spec *fwd)
{
char buf[BUFFER_SIZE];
char *hdr;
int server_body;
int ms_iis5_hack = 0;
unsigned long long byte_count = 0;
- const struct forward_spec *fwd;
struct http_request *http;
long len = 0; /* for buffer sizes (and negative error codes) */
int buffer_and_filter_content = 0;
struct http_response *rsp;
struct timeval timeout;
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- int watch_client_socket = 1;
+ int watch_client_socket;
#endif
memset(buf, 0, sizeof(buf));
http = csp->http;
- if (receive_client_request(csp) != JB_ERR_OK)
- {
- return;
- }
- if (parse_client_request(csp) != JB_ERR_OK)
- {
- return;
- }
-
- /* decide how to route the HTTP request */
- fwd = forward_url(csp, http);
- if (NULL == fwd)
- {
- log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
- /* Never get here - LOG_LEVEL_FATAL causes program exit */
- return;
- }
-
- /*
- * build the http request to send to the server
- * we have to do one of the following:
- *
- * create = use the original HTTP request to create a new
- * HTTP request that has either the path component
- * without the http://domainspec (w/path) or the
- * full orininal URL (w/url)
- * Note that the path and/or the HTTP version may
- * have been altered by now.
- *
- * connect = Open a socket to the host:port of the server
- * and short-circuit server and client socket.
- *
- * pass = Pass the request unchanged if forwarding a CONNECT
- * request to a parent proxy. Note that we'll be sending
- * the CFAIL message ourselves if connecting to the parent
- * fails, but we won't send a CSUCCEED message if it works,
- * since that would result in a double message (ours and the
- * parent's). After sending the request to the parent, we simply
- * tunnel.
- *
- * here's the matrix:
- * SSL
- * 0 1
- * +--------+--------+
- * | | |
- * 0 | create | connect|
- * | w/path | |
- * Forwarding +--------+--------+
- * | | |
- * 1 | create | pass |
- * | w/url | |
- * +--------+--------+
- *
- */
-
- if (http->ssl && connect_port_is_forbidden(csp))
- {
- const char *acceptable_connect_ports =
- csp->action->string[ACTION_STRING_LIMIT_CONNECT];
- assert(NULL != acceptable_connect_ports);
- log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
- "limit-connect{%s} doesn't allow CONNECT requests to %s",
- csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
- csp->action->flags |= ACTION_BLOCK;
- http->ssl = 0;
- }
-
- if (http->ssl == 0)
- {
- freez(csp->headers->first->str);
- build_request_line(csp, fwd, &csp->headers->first->str);
- }
-
- /*
- * We have a request. Check if one of the crunchers wants it.
- */
- if (crunch_response_triggered(csp, crunchers_all))
- {
- /*
- * Yes. The client got the crunch response and we're done here.
- */
- return;
- }
-
- log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
-
- if (fwd->forward_host)
- {
- log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
- fwd->forward_host, fwd->forward_port, http->hostport);
- }
- else
- {
- log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
- }
-
- /* here we connect to the server, gateway, or the forwarder */
-
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
- && socket_is_still_alive(csp->server_connection.sfd)
- && connection_destination_matches(&csp->server_connection, http, fwd))
- {
- log_error(LOG_LEVEL_CONNECT,
- "Reusing server socket %u. Opened for %s.",
- csp->server_connection.sfd, csp->server_connection.host);
- }
- else
- {
- if (csp->server_connection.sfd != JB_INVALID_SOCKET)
- {
- log_error(LOG_LEVEL_CONNECT,
- "Closing server socket %u. Opened for %s.",
- csp->server_connection.sfd, csp->server_connection.host);
- close_socket(csp->server_connection.sfd);
- mark_connection_closed(&csp->server_connection);
- }
-#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
-
- csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
-
- if (csp->server_connection.sfd == JB_INVALID_SOCKET)
- {
- if (fwd->type != SOCKS_NONE)
- {
- /* Socks error. */
- rsp = error_response(csp, "forwarding-failed");
- }
- else if (errno == EINVAL)
- {
- rsp = error_response(csp, "no-such-domain");
- }
- else
- {
- rsp = error_response(csp, "connect-failed");
- }
-
- /* Write the answer to the client */
- if (rsp != NULL)
- {
- send_crunch_response(csp, rsp);
- }
-
- return;
- }
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- save_connection_destination(csp->server_connection.sfd,
- http, fwd, &csp->server_connection);
- csp->server_connection.keep_alive_timeout =
- (unsigned)csp->config->keep_alive_timeout;
- }
-#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
-
- hdr = list_to_text(csp->headers);
- if (hdr == NULL)
- {
- /* FIXME Should handle error properly */
- log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
- }
- list_remove_all(csp->headers);
-
- if (fwd->forward_host || (http->ssl == 0))
- {
- /*
- * Write the client's (modified) header to the server
- * (along with anything else that may be in the buffer)
- */
- if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
- || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
- {
- log_error(LOG_LEVEL_CONNECT,
- "write header to: %s failed: %E", http->hostport);
-
- rsp = error_response(csp, "connect-failed");
- if (rsp)
- {
- send_crunch_response(csp, rsp);
- }
-
- freez(hdr);
- return;
- }
- }
- else
- {
- /*
- * We're running an SSL tunnel and we're not forwarding,
- * so just send the "connect succeeded" message to the
- * client, flush the rest, and get out of the way.
- */
- if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
- {
- freez(hdr);
- return;
- }
- IOB_RESET(csp);
- }
-
- log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
-
- csp->server_connection.request_sent = time(NULL);
-
- /* we're finished with the client's header */
- freez(hdr);
-
maxfd = (csp->cfd > csp->server_connection.sfd) ?
csp->cfd : csp->server_connection.sfd;
server_body = 0;
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
+#endif
+
for (;;)
{
#ifdef __OS2__
*/
watch_client_socket = 0;
log_error(LOG_LEVEL_CONNECT,
- "Stopping to watch the client socket. "
- "There's already another request waiting.");
+ "Stopping to watch the client socket %d. "
+ "There's already another request waiting.",
+ csp->cfd);
continue;
}
/*
}
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- fflush(NULL);
len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
if (len < 0)
*/
if (NULL == p)
{
- csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
+ csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
+ }
+#ifdef FEATURE_COMPRESSION
+ else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
+ && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
+ {
+ char *compressed_content = compress_buffer(p,
+ (size_t *)&csp->content_length, csp->config->compression_level);
+ if (compressed_content != NULL)
+ {
+ freez(p);
+ p = compressed_content;
+ csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
+ }
}
+#endif
if (JB_ERR_OK != update_server_headers(csp))
{
* has been reached, switch to non-filtering mode, i.e. make & write the
* header, flush the iob and buf, and get out of the way.
*/
- if (add_to_iob(csp, buf, len))
+ if (add_to_iob(csp->iob, csp->config->buffer_limit, buf, len))
{
size_t hdrlen;
long flushed;
hdr = list_to_text(csp->headers);
if (hdr == NULL)
{
- /*
+ /*
* Memory is too tight to even generate the header.
* Send our static "Out-of-memory" page.
*/
* Buffer up the data we just read. If that fails, there's
* little we can do but send our static out-of-memory page.
*/
- if (add_to_iob(csp, buf, len))
+ if (add_to_iob(csp->iob, csp->config->buffer_limit, buf, len))
{
log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
rsp = cgi_error_memory();
- send_crunch_response(csp, rsp);
+ send_crunch_response(csp, rsp);
mark_server_socket_tainted(csp);
return;
}
* we can parse the headers we just continue here.
*/
log_error(LOG_LEVEL_CONNECT,
- "Continuing buffering headers. Bytes most recently read: %d.",
- len);
+ "Continuing buffering server headers from socket %d. "
+ "Bytes most recently read: %d.", csp->cfd, len);
continue;
}
}
if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
{
log_error(LOG_LEVEL_ERROR,
- "Empty server or forwarder response received on socket %d. "
+ "No server or forwarder response received on socket %d. "
"Closing client socket %d without sending data.",
csp->server_connection.sfd, csp->cfd);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
}
else
{
log_error(LOG_LEVEL_ERROR,
- "Empty server or forwarder response received on socket %d.",
+ "No server or forwarder response received on socket %d.",
csp->server_connection.sfd);
send_crunch_response(csp, error_response(csp, "no-server-data"));
}
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
free_http_request(http);
mark_server_socket_tainted(csp);
return;
*/
if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
{
- log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+ return;
}
hdr = list_to_text(csp->headers);
if (hdr == NULL)
/* we're finished with the server's header */
- freez(hdr);
- server_body = 1;
+ freez(hdr);
+ server_body = 1;
+
+ /*
+ * If this was a MS IIS/5 hack then it means the server
+ * has already closed the connection. Nothing more to read.
+ * Time to bail.
+ */
+ if (ms_iis5_hack)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Closed server connection detected. "
+ "Applying the MS IIS5 hack didn't help.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ mark_server_socket_tainted(csp);
+ return;
+ }
+ }
+ continue;
+ }
+ mark_server_socket_tainted(csp);
+ return; /* huh? we should never get here */
+ }
+
+ if (csp->content_length == 0)
+ {
+ /*
+ * If Privoxy didn't recalculate the Content-Length,
+ * byte_count is still correct.
+ */
+ csp->content_length = byte_count;
+ }
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
+ && (csp->expected_content_length != byte_count))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Received %llu bytes while expecting %llu.",
+ byte_count, csp->expected_content_length);
+ mark_server_socket_tainted(csp);
+ }
+#endif
+
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
+ csp->ip_addr_str, http->ocmd, csp->content_length);
+
+ csp->server_connection.timestamp = time(NULL);
+}
+
+
+/*********************************************************************
+ *
+ * Function : chat
+ *
+ * Description : Once a connection from the client has been accepted,
+ * this function is called (via serve()) to handle the
+ * main business of the communication. This function
+ * returns after dealing with a single request. It can
+ * be called multiple times with the same client socket
+ * if the client is keeping the connection alive.
+ *
+ * The decision whether or not a client connection will
+ * be kept alive is up to the caller which also must
+ * close the client socket when done.
+ *
+ * FIXME: chat is nearly thousand lines long.
+ * Ridiculous.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void chat(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ const struct forward_spec *fwd;
+ struct http_request *http;
+ /* Skeleton for HTTP response, if we should intercept the request */
+ struct http_response *rsp;
+
+ memset(buf, 0, sizeof(buf));
+
+ http = csp->http;
+
+ if (receive_client_request(csp) != JB_ERR_OK)
+ {
+ return;
+ }
+ if (parse_client_request(csp) != JB_ERR_OK)
+ {
+ return;
+ }
+
+ /* decide how to route the HTTP request */
+ fwd = forward_url(csp, http);
+ if (NULL == fwd)
+ {
+ log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
+ /* Never get here - LOG_LEVEL_FATAL causes program exit */
+ return;
+ }
+
+ /*
+ * build the http request to send to the server
+ * we have to do one of the following:
+ *
+ * create = use the original HTTP request to create a new
+ * HTTP request that has either the path component
+ * without the http://domainspec (w/path) or the
+ * full orininal URL (w/url)
+ * Note that the path and/or the HTTP version may
+ * have been altered by now.
+ *
+ * connect = Open a socket to the host:port of the server
+ * and short-circuit server and client socket.
+ *
+ * pass = Pass the request unchanged if forwarding a CONNECT
+ * request to a parent proxy. Note that we'll be sending
+ * the CFAIL message ourselves if connecting to the parent
+ * fails, but we won't send a CSUCCEED message if it works,
+ * since that would result in a double message (ours and the
+ * parent's). After sending the request to the parent, we simply
+ * tunnel.
+ *
+ * here's the matrix:
+ * SSL
+ * 0 1
+ * +--------+--------+
+ * | | |
+ * 0 | create | connect|
+ * | w/path | |
+ * Forwarding +--------+--------+
+ * | | |
+ * 1 | create | pass |
+ * | w/url | |
+ * +--------+--------+
+ *
+ */
+
+ if (http->ssl && connect_port_is_forbidden(csp))
+ {
+ const char *acceptable_connect_ports =
+ csp->action->string[ACTION_STRING_LIMIT_CONNECT];
+ assert(NULL != acceptable_connect_ports);
+ log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
+ "limit-connect{%s} doesn't allow CONNECT requests to %s",
+ csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
+ csp->action->flags |= ACTION_BLOCK;
+ http->ssl = 0;
+ }
+
+ if (http->ssl == 0)
+ {
+ freez(csp->headers->first->str);
+ build_request_line(csp, fwd, &csp->headers->first->str);
+ }
+
+ /*
+ * We have a request. Check if one of the crunchers wants it.
+ */
+ if (crunch_response_triggered(csp, crunchers_all))
+ {
+ /*
+ * Yes. The client got the crunch response and we're done here.
+ */
+ return;
+ }
+
+ log_applied_actions(csp->action);
+ log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
+
+ if (fwd->forward_host)
+ {
+ log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
+ fwd->forward_host, fwd->forward_port, http->hostport);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
+ }
+
+ /* here we connect to the server, gateway, or the forwarder */
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
+ && socket_is_still_alive(csp->server_connection.sfd)
+ && connection_destination_matches(&csp->server_connection, http, fwd))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Reusing server socket %d connected to %s. Total requests: %u.",
+ csp->server_connection.sfd, csp->server_connection.host,
+ csp->server_connection.requests_sent_total);
+ }
+ else
+ {
+ if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ {
+#ifdef FEATURE_CONNECTION_SHARING
+ if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+ {
+ remember_connection(&csp->server_connection);
+ }
+ else
+#endif /* def FEATURE_CONNECTION_SHARING */
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Closing server socket %d connected to %s. Total requests: %u.",
+ csp->server_connection.sfd, csp->server_connection.host,
+ csp->server_connection.requests_sent_total);
+ close_socket(csp->server_connection.sfd);
+ }
+ mark_connection_closed(&csp->server_connection);
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+ csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
+
+ if (csp->server_connection.sfd == JB_INVALID_SOCKET)
+ {
+ if (fwd->type != SOCKS_NONE)
+ {
+ /* Socks error. */
+ rsp = error_response(csp, "forwarding-failed");
+ }
+ else if (errno == EINVAL)
+ {
+ rsp = error_response(csp, "no-such-domain");
+ }
+ else
+ {
+ rsp = error_response(csp, "connect-failed");
+ }
+
+ /* Write the answer to the client */
+ if (rsp != NULL)
+ {
+ send_crunch_response(csp, rsp);
+ }
+
+ /*
+ * Temporary workaround to prevent already-read client
+ * bodies from being parsed as new requests. For now we
+ * err on the safe side and throw all the following
+ * requests under the bus, even if no client body has been
+ * buffered. A compliant client will repeat the dropped
+ * requests on an untainted connection.
+ *
+ * The proper fix is to discard the no longer needed
+ * client body in the buffer (if there is one) and to
+ * continue parsing the bytes that follow.
+ */
+ drain_and_close_socket(csp->cfd);
+ csp->cfd = JB_INVALID_SOCKET;
+
+ return;
+ }
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ save_connection_destination(csp->server_connection.sfd,
+ http, fwd, &csp->server_connection);
+ csp->server_connection.keep_alive_timeout =
+ (unsigned)csp->config->keep_alive_timeout;
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+ csp->server_connection.requests_sent_total++;
- /*
- * If this was a MS IIS/5 hack then it means the server
- * has already closed the connection. Nothing more to read.
- * Time to bail.
- */
- if (ms_iis5_hack)
- {
- log_error(LOG_LEVEL_ERROR,
- "Closed server connection detected. "
- "Applying the MS IIS5 hack didn't help.");
- log_error(LOG_LEVEL_CLF,
- "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
- write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
- strlen(INVALID_SERVER_HEADERS_RESPONSE));
- mark_server_socket_tainted(csp);
- return;
- }
+ if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
+ {
+ /* Client headers have been sent optimistically */
+ assert(csp->headers->last == NULL);
+ }
+ else if (fwd->forward_host || (http->ssl == 0))
+ {
+ if (send_http_request(csp))
+ {
+ rsp = error_response(csp, "connect-failed");
+ if (rsp)
+ {
+ send_crunch_response(csp, rsp);
}
- continue;
+ return;
}
- mark_server_socket_tainted(csp);
- return; /* huh? we should never get here */
}
-
- if (csp->content_length == 0)
+ else
{
/*
- * If Privoxy didn't recalculate the Content-Length,
- * byte_count is still correct.
+ * We're running an SSL tunnel and we're not forwarding,
+ * so just ditch the client headers, send the "connect succeeded"
+ * message to the client, flush the rest, and get out of the way.
*/
- csp->content_length = byte_count;
+ list_remove_all(csp->headers);
+ if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
+ {
+ return;
+ }
+ clear_iob(csp->client_iob);
}
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
- && (csp->expected_content_length != byte_count))
+ log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
+
+ /* XXX: should the time start earlier for optimistically sent data? */
+ csp->server_connection.request_sent = time(NULL);
+
+ handle_established_connection(csp, fwd);
+}
+
+
+#ifdef FUZZ
+/*********************************************************************
+ *
+ * Function : fuzz_server_response
+ *
+ * Description : Treat the input as a whole server response.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : fuzz_input_file = File to read the input from.
+ *
+ * Returns : 0
+ *
+ *********************************************************************/
+extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
+{
+ static struct forward_spec fwd; /* Zero'd due to being static */
+ csp->cfd = 0;
+
+ if (strcmp(fuzz_input_file, "-") == 0)
{
- log_error(LOG_LEVEL_CONNECT,
- "Received %llu bytes while expecting %llu.",
- byte_count, csp->expected_content_length);
- mark_server_socket_tainted(csp);
+ /* XXX: Doesn'T work yet. */
+ csp->server_connection.sfd = 0;
}
-#endif
+ else
+ {
+ csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
+ if (csp->server_connection.sfd == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
+ fuzz_input_file);
+ }
+ }
+ csp->content_type |= CT_GIF;
+ csp->action->flags |= ACTION_DEANIMATE;
+ csp->action->string[ACTION_STRING_DEANIMATE] = "last";
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
- csp->ip_addr_str, http->ocmd, csp->content_length);
+ csp->http->path = strdup_or_die("/");
+ csp->http->host = strdup_or_die("fuzz.example.org");
+ csp->http->hostport = strdup_or_die("fuzz.example.org:80");
+ /* Prevent client socket monitoring */
+ csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
+ csp->flags |= CSP_FLAG_CHUNKED;
- csp->server_connection.timestamp = time(NULL);
+ csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
+ csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
+
+ csp->content_type |= CT_DECLARED|CT_GIF;
+
+ csp->config->socket_timeout = 0;
+
+ cgi_init_error_messages();
+
+ handle_established_connection(csp, &fwd);
+
+ return 0;
}
+#endif
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
csp->expected_content_length = 0;
csp->expected_client_content_length = 0;
list_remove_all(csp->headers);
- freez(csp->iob->buf);
- memset(csp->iob, 0, sizeof(csp->iob));
+ clear_iob(csp->iob);
freez(csp->error_message);
free_http_request(csp->http);
destroy_list(csp->headers);
destroy_list(csp->tags);
+#ifdef FEATURE_CLIENT_TAGS
+ destroy_list(csp->client_tags);
+ freez(csp->client_address);
+#endif
free_current_action(csp->action);
if (NULL != csp->fwd)
{
csp->fwd = NULL;
}
/* XXX: Store per-connection flags someplace else. */
- csp->flags &= CSP_FLAG_TOGGLED_ON;
- csp->flags |= CSP_FLAG_ACTIVE;
- csp->flags |= CSP_FLAG_REUSED_CLIENT_CONNECTION;
+ csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
+#ifdef FEATURE_TOGGLE
+ if (global_toggle_state)
+#endif /* def FEATURE_TOGGLE */
+ {
+ csp->flags |= CSP_FLAG_TOGGLED_ON;
+ }
+
+ if (csp->client_iob->eod > csp->client_iob->cur)
+ {
+ long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
+ size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
+
+ assert(bytes_to_shift > 0);
+ assert(data_length > 0);
+
+ log_error(LOG_LEVEL_CONNECT, "Shifting %d pipelined bytes by %d bytes",
+ data_length, bytes_to_shift);
+ memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
+ csp->client_iob->cur = csp->client_iob->buf;
+ assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
+ csp->client_iob->eod = csp->client_iob->buf + data_length;
+ memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
+
+ csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
+ }
+ else
+ {
+ /*
+ * We mainly care about resetting client_iob->cur so we don't
+ * waste buffer space at the beginning and don't mess up the
+ * request restoration done by cgi_show_request().
+ *
+ * Freeing the buffer itself isn't technically necessary,
+ * but makes debugging more convenient.
+ */
+ clear_iob(csp->client_iob);
+ }
}
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
static void serve(struct client_state *csp)
#endif /* def AMIGA */
{
+ int config_file_change_detected = 0; /* Only used for debugging */
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
#ifdef FEATURE_CONNECTION_SHARING
static int monitor_thread_running = 0;
#endif /* def FEATURE_CONNECTION_SHARING */
int continue_chatting = 0;
+ log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
+ csp->ip_addr_str, csp->cfd);
+
do
{
unsigned int latency;
- int config_file_change_detected = 0; /* Only used for debugging */
chat(csp);
latency = (unsigned)(csp->server_connection.response_received -
csp->server_connection.request_sent) / 2;
+ if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
+ && (csp->flags & CSP_FLAG_CRUNCHED)
+ && (csp->expected_client_content_length != 0))
+ {
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ log_error(LOG_LEVEL_CONNECT,
+ "Tainting client socket %d due to unread data.", csp->cfd);
+ }
+
continue_chatting = (csp->config->feature_flags
& RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
- && (((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
- && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
- || (csp->flags & CSP_FLAG_CRUNCHED))
+ && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
&& (csp->cfd != JB_INVALID_SOCKET)
- && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE);
+ && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
+ && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
+ || (csp->flags & CSP_FLAG_CHUNKED));
- if (continue_chatting && !(csp->flags & CSP_FLAG_CRUNCHED))
+ if (!(csp->flags & CSP_FLAG_CRUNCHED)
+ && (csp->server_connection.sfd != JB_INVALID_SOCKET))
{
- continue_chatting = (csp->server_connection.sfd != JB_INVALID_SOCKET)
- && socket_is_still_alive(csp->server_connection.sfd);
- if (continue_chatting)
+ if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
+ {
+ csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
+ }
+ if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
+ || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
+ || !socket_is_still_alive(csp->server_connection.sfd)
+ || !(latency < csp->server_connection.keep_alive_timeout))
{
- if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
+ log_error(LOG_LEVEL_CONNECT,
+ "Closing server socket %d connected to %s. "
+ "Keep-alive %u. Tainted: %u. Socket alive %u. Timeout: %u.",
+ csp->server_connection.sfd, csp->server_connection.host,
+ 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
+ 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
+ socket_is_still_alive(csp->server_connection.sfd),
+ csp->server_connection.keep_alive_timeout);
+#ifdef FEATURE_CONNECTION_SHARING
+ if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
{
- csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
- log_error(LOG_LEVEL_CONNECT,
- "The server didn't specify how long the connection will stay open. "
- "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
+ forget_connection(csp->server_connection.sfd);
}
- continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
+#endif /* def FEATURE_CONNECTION_SHARING */
+ close_socket(csp->server_connection.sfd);
+ mark_connection_closed(&csp->server_connection);
}
}
- if (continue_chatting && any_loaded_file_changed(csp->config->config_file_list))
+ if (continue_chatting && any_loaded_file_changed(csp))
{
continue_chatting = 0;
config_file_change_detected = 1;
if (continue_chatting)
{
- unsigned int client_timeout;
-
- if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
+ && socket_is_still_alive(csp->cfd))
{
- client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
- log_error(LOG_LEVEL_CONNECT,
- "Waiting for the next client request on socket %d. "
- "Keeping the server socket %d to %s open.",
- csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
+ log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
+ "pipelined on socket %d and the socket is still alive.",
+ csp->requests_received_total+1, csp->cfd);
+ prepare_csp_for_next_request(csp);
+ continue;
}
- else
+
+ if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
{
- client_timeout = 1; /* XXX: Use something else here? */
- log_error(LOG_LEVEL_CONNECT,
- "Waiting for the next client request on socket %d. "
- "No server socket to keep open.", csp->cfd);
+ if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client request on socket %d. "
+ "Keeping the server socket %d to %s open.",
+ csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client request on socket %d. "
+ "No server socket to keep open.", csp->cfd);
+ }
}
+
if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
- && data_is_available(csp->cfd, (int)client_timeout)
+ && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
&& socket_is_still_alive(csp->cfd))
{
log_error(LOG_LEVEL_CONNECT,
- "Client request arrived in time on socket %d.", csp->cfd);
+ "Client request %u arrived in time on socket %d.",
+ csp->requests_received_total+1, csp->cfd);
prepare_csp_for_next_request(csp);
}
else
{
- log_error(LOG_LEVEL_CONNECT,
- "No additional client request received in time on socket %d.",
- csp->cfd);
#ifdef FEATURE_CONNECTION_SHARING
if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+ && (csp->server_connection.sfd != JB_INVALID_SOCKET)
&& (socket_is_still_alive(csp->server_connection.sfd)))
{
time_t time_open = time(NULL) - csp->server_connection.timestamp;
remember_connection(&csp->server_connection);
csp->server_connection.sfd = JB_INVALID_SOCKET;
- close_socket(csp->cfd);
+ drain_and_close_socket(csp->cfd);
csp->cfd = JB_INVALID_SOCKET;
privoxy_mutex_lock(&connection_reuse_mutex);
if (!monitor_thread_running)
else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
{
log_error(LOG_LEVEL_CONNECT,
- "The connection on server socket %d to %s isn't reusable. Closing. "
- "Server connection: keep-alive %u, tainted: %u, socket alive %u. "
- "Client connection: socket alive: %u. Server timeout: %u. "
+ "Closing server socket %d connected to %s. Keep-alive: %u. "
+ "Tainted: %u. Socket alive: %u. Timeout: %u. "
"Configuration file change detected: %u",
csp->server_connection.sfd, csp->server_connection.host,
0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
socket_is_still_alive(csp->server_connection.sfd),
- socket_is_still_alive(csp->cfd),
csp->server_connection.keep_alive_timeout,
config_file_change_detected);
}
if (csp->cfd != JB_INVALID_SOCKET)
{
- close_socket(csp->cfd);
+ log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
+ "Keep-alive: %u. Socket alive: %u. Data available: %u. "
+ "Configuration file change detected: %u. Requests received: %u.",
+ csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
+ socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
+ config_file_change_detected, csp->requests_received_total);
+ drain_and_close_socket(csp->cfd);
}
csp->flags &= ~CSP_FLAG_ACTIVE;
* Returns : No. ,-)
*
*********************************************************************/
-static void usage(const char *myname)
+static void usage(const char *name)
{
printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
- "Usage: %s "
+ "Usage: %s [--config-test] "
#if defined(unix)
"[--chroot] "
#endif /* defined(unix) */
#if defined(unix)
"[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
#endif /* defined(unix) */
- "[--version] [configfile]\n"
- "Aborting\n", myname);
+ "[--version] [configfile]\n",
+ name);
+
+#ifdef FUZZ
+ show_fuzz_usage(name);
+#endif
+
+ printf("Aborting\n");
exit(2);
privoxy_mutex_init(&log_mutex);
privoxy_mutex_init(&log_init_mutex);
privoxy_mutex_init(&connection_reuse_mutex);
+#ifdef FEATURE_EXTERNAL_FILTERS
+ privoxy_mutex_init(&external_filter_mutex);
+#endif
+#ifdef FEATURE_CLIENT_TAGS
+ privoxy_mutex_init(&client_tags_mutex);
+#endif
/*
* XXX: The assumptions below are a bit naive
#ifndef HAVE_RANDOM
privoxy_mutex_init(&rand_mutex);
#endif /* ndef HAVE_RANDOM */
+
#endif /* def MUTEX_LOCKS_AVAILABLE */
}
-
/*********************************************************************
*
* Function : main
#endif
{
int argc_pos = 0;
+ int do_config_test = 0;
unsigned int random_seed;
#ifdef unix
struct passwd *pw = NULL;
int do_chroot = 0;
char *pre_chroot_nslookup_to_load_resolver = NULL;
#endif
+#ifdef FUZZ
+ char *fuzz_input_type = NULL;
+ char *fuzz_input_file = NULL;
+#endif
Argc = argc;
Argv = argv;
const char *pName = argv[argc_pos] + 9;
if (*pName == ':')
pName++;
- exit( (install_service(pName)) ? 0 : 1 );
+ exit((install_service(pName)) ? 0 : 1);
}
else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
{
pName++;
exit((uninstall_service(pName)) ? 0 : 1);
}
- else if (strcmp(argv[argc_pos], "--service" ) == 0)
+ else if (strcmp(argv[argc_pos], "--service") == 0)
{
bRunAsService = TRUE;
w32_set_service_cwd();
usage(argv[0]);
}
- else if(strcmp(argv[argc_pos], "--version") == 0)
+ else if (strcmp(argv[argc_pos], "--version") == 0)
{
printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
exit(0);
#if defined(unix)
- else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
+ else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
{
set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
daemon_mode = 0;
}
- else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
+ else if (strcmp(argv[argc_pos], "--pidfile") == 0)
{
if (++argc_pos == argc) usage(argv[0]);
- pidfile = strdup(argv[argc_pos]);
+ pidfile = strdup_or_die(argv[argc_pos]);
}
- else if (strcmp(argv[argc_pos], "--user" ) == 0)
+ else if (strcmp(argv[argc_pos], "--user") == 0)
{
char *user_arg;
char *group_name;
if (++argc_pos == argc) usage(argv[argc_pos]);
- user_arg = strdup(argv[argc_pos]);
- if (NULL == user_arg)
- {
- log_error(LOG_LEVEL_FATAL,
- "Out of memory splitting --user argument '%s'.", argv[argc_pos]);
- }
+ user_arg = strdup_or_die(argv[argc_pos]);
group_name = strchr(user_arg, '.');
if (NULL != group_name)
{
freez(user_arg);
}
- else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
+ else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
{
if (++argc_pos == argc) usage(argv[0]);
- pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
+ pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
}
- else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
+ else if (strcmp(argv[argc_pos], "--chroot") == 0)
{
do_chroot = 1;
}
#endif /* defined(unix) */
+ else if (strcmp(argv[argc_pos], "--config-test") == 0)
+ {
+ do_config_test = 1;
+ }
+#ifdef FUZZ
+ else if (strcmp(argv[argc_pos], "--fuzz") == 0)
+ {
+ argc_pos++;
+ if (argc < argc_pos + 2) usage(argv[0]);
+ fuzz_input_type = argv[argc_pos];
+ argc_pos++;
+ fuzz_input_file = argv[argc_pos];
+ }
+ else if (strcmp(argv[argc_pos], "--stfu") == 0)
+ {
+ set_debug_level(LOG_LEVEL_STFU);
+ }
+#endif
else if (argc_pos + 1 != argc)
{
/*
show_version(Argv[0]);
#if defined(unix)
- if ( *configfile != '/' )
+ if (*configfile != '/')
{
char cwd[BUFFER_SIZE];
char *abs_file;
- size_t abs_file_size;
+ size_t abs_file_size;
/* make config-filename absolute here */
if (NULL == getcwd(cwd, sizeof(cwd)))
{
perror("failed to get current working directory");
- exit( 1 );
+ exit(1);
}
+ basedir = strdup_or_die(cwd);
/* XXX: why + 5? */
abs_file_size = strlen(cwd) + strlen(configfile) + 5;
- basedir = strdup(cwd);
-
- if (NULL == basedir ||
- NULL == (abs_file = malloc(abs_file_size)))
- {
- perror("malloc failed");
- exit( 1 );
- }
+ abs_file = malloc_or_die(abs_file_size);
strlcpy(abs_file, basedir, abs_file_size);
- strlcat(abs_file, "/", abs_file_size );
+ strlcat(abs_file, "/", abs_file_size);
strlcat(abs_file, configfile, abs_file_size);
configfile = abs_file;
}
*
* Catch the abort, interrupt and terminate signals for a graceful exit
* Catch the hangup signal so the errlog can be reopened.
- * Ignore the broken pipe signals (FIXME: Why?)
+ *
+ * Ignore the broken pipe signal as connection failures
+ * are handled when and where they occur without relying
+ * on a signal.
*/
#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
{
int idx;
- const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
- const int ignored_signals[] = { SIGPIPE, 0 };
+ const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
- for (idx = 0; catched_signals[idx] != 0; idx++)
+ for (idx = 0; idx < SZ(catched_signals); idx++)
{
-#ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
+#ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
#else
if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
}
}
- for (idx = 0; ignored_signals[idx] != 0; idx++)
+ if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
{
- if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
- {
- log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
- }
+ log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
}
}
# endif /* def _WIN_CONSOLE */
#endif /* def _WIN32 */
+#ifdef FUZZ
+ if (fuzz_input_type != NULL)
+ {
+ exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
+ }
+#endif
+
+ if (do_config_test)
+ {
+ exit(NULL == load_config());
+ }
/* Initialize the CGI subsystem */
cgi_init_error_messages();
/*
- * If runnig on unix and without the --nodaemon
+ * If running on unix and without the --no-daemon
* option, become a daemon. I.e. fork, detach
* from tty and get process group leadership
*/
int fd;
pid_t pid = fork();
- if ( pid < 0 ) /* error */
+ if (pid < 0) /* error */
{
perror("fork");
- exit( 3 );
+ exit(3);
}
- else if ( pid != 0 ) /* parent */
+ else if (pid != 0) /* parent */
{
int status;
pid_t wpid;
* must check for errors
* child died due to missing files aso
*/
- sleep( 1 );
- wpid = waitpid( pid, &status, WNOHANG );
- if ( wpid != 0 )
+ sleep(1);
+ wpid = waitpid(pid, &status, WNOHANG);
+ if (wpid != 0)
{
- exit( 1 );
+ exit(1);
}
- exit( 0 );
+ exit(0);
}
/* child */
close(fd);
}
+#ifdef FEATURE_EXTERNAL_FILTERS
+ for (fd = 0; fd < 3; fd++)
+ {
+ mark_socket_for_close_on_execute(fd);
+ }
+#endif
+
chdir("/");
} /* -END- if (daemon_mode) */
if (putenv(putenv_dummy) != 0)
{
log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
- }
+ }
snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
if (putenv(putenv_dummy) != 0)
*/
if (bRunAsService)
{
- /* Yup, so now we must attempt to establish a connection
+ /* Yup, so now we must attempt to establish a connection
* with the service dispatcher. This will only work if this
* process was launched by the service control manager to
* actually run as a service. If this isn't the case, i've
* on failure.
*
* Parameters :
- * 1 : config = Privoxy configuration. Specifies port
- * to bind to.
+ * 1 : haddr = Host address to bind to. Use NULL to bind to
+ * INADDR_ANY.
+ * 2 : hport = Specifies port to bind to.
*
* Returns : Port that was opened.
*
*********************************************************************/
-static jb_socket bind_port_helper(struct configuration_spec * config)
+static jb_socket bind_port_helper(const char *haddr, int hport)
{
int result;
jb_socket bfd;
- if (config->haddr == NULL)
- {
- log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
- config->hport);
- }
- else
- {
- log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
- config->hport, config->haddr);
- }
-
- result = bind_port(config->haddr, config->hport, &bfd);
+ result = bind_port(haddr, hport, &bfd);
if (result < 0)
{
+ const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
switch(result)
{
- case -3 :
- log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
- "There may be another Privoxy or some other "
- "proxy running on port %d",
- (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
- config->hport, config->hport);
+ case -3:
+ log_error(LOG_LEVEL_FATAL,
+ "can't bind to %s:%d: There may be another Privoxy "
+ "or some other proxy running on port %d",
+ bind_address, hport, hport);
- case -2 :
- log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
- "The hostname is not resolvable",
- (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
+ case -2:
+ log_error(LOG_LEVEL_FATAL,
+ "can't bind to %s:%d: The hostname is not resolvable",
+ bind_address, hport);
- default :
+ default:
log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
- (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
+ bind_address, hport);
}
/* shouldn't get here */
return JB_INVALID_SOCKET;
}
- config->need_bind = 0;
+#ifndef _WIN32
+ if (bfd >= FD_SETSIZE)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Bind socket number too high to use select(): %d >= %d",
+ bfd, FD_SETSIZE);
+ }
+#endif
+
+ if (haddr == NULL)
+ {
+ log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
+ hport);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
+ hport, haddr);
+ }
return bfd;
}
+/*********************************************************************
+ *
+ * Function : bind_ports_helper
+ *
+ * Description : Bind the listen ports. Handles logging, and aborts
+ * on failure.
+ *
+ * Parameters :
+ * 1 : config = Privoxy configuration. Specifies ports
+ * to bind to.
+ * 2 : sockets = Preallocated array of opened sockets
+ * corresponding to specification in config.
+ * All non-opened sockets will be set to
+ * JB_INVALID_SOCKET.
+ *
+ * Returns : Nothing. Inspect sockets argument.
+ *
+ *********************************************************************/
+static void bind_ports_helper(struct configuration_spec * config,
+ jb_socket sockets[])
+{
+ int i;
+
+ for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
+ {
+ if (config->hport[i])
+ {
+ sockets[i] = bind_port_helper(config->haddr[i], config->hport[i]);
+ }
+ else
+ {
+ sockets[i] = JB_INVALID_SOCKET;
+ }
+ }
+ config->need_bind = 0;
+}
+
+
+/*********************************************************************
+ *
+ * Function : close_ports_helper
+ *
+ * Description : Close listenings ports.
+ *
+ * Parameters :
+ * 1 : sockets = Array of opened and non-opened sockets to
+ * close. All sockets will be set to
+ * JB_INVALID_SOCKET.
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void close_ports_helper(jb_socket sockets[])
+{
+ int i;
+
+ for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
+ {
+ if (JB_INVALID_SOCKET != sockets[i])
+ {
+ close_socket(sockets[i]);
+ }
+ sockets[i] = JB_INVALID_SOCKET;
+ }
+}
+
+
#ifdef _WIN32
/* Without this simple workaround we get this compiler warning from _beginthread
* warning C4028: formal parameter 1 different from declaration
{
struct client_states *csp_list = NULL;
struct client_state *csp = NULL;
- jb_socket bfd;
+ jb_socket bfds[MAX_LISTENING_SOCKETS];
struct configuration_spec *config;
unsigned int active_threads = 0;
initialize_reusable_connections();
#endif /* def FEATURE_CONNECTION_SHARING */
- bfd = bind_port_helper(config);
+ bind_ports_helper(config, bfds);
#ifdef FEATURE_GRACEFUL_TERMINATION
while (!g_terminate)
}
#endif
- csp_list = (struct client_states *)zalloc(sizeof(*csp_list));
- if (NULL == csp_list)
- {
- log_error(LOG_LEVEL_FATAL,
- "malloc(%d) for csp_list failed: %E", sizeof(*csp_list));
- continue;
- }
+ csp_list = zalloc_or_die(sizeof(*csp_list));
csp = &csp_list->csp;
- log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client connection. Currently active threads: %d",
+ active_threads);
+
+ /*
+ * This config may be outdated, but for accept_connection()
+ * it's fresh enough.
+ */
+ csp->config = config;
- if (!accept_connection(csp, bfd))
+ if (!accept_connection(csp, bfds))
{
log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
#ifdef AMIGA
- if(!childs)
+ if (!childs)
{
exit(1);
}
freez(csp_list);
continue;
}
- else
- {
- log_error(LOG_LEVEL_CONNECT,
- "accepted connection from %s on socket %d",
- csp->ip_addr_str, csp->cfd);
- }
csp->flags |= CSP_FLAG_ACTIVE;
csp->server_connection.sfd = JB_INVALID_SOCKET;
csp->config = config = load_config();
- if ( config->need_bind )
+ if (config->need_bind)
{
/*
* Since we were listening to the "old port", we will not see
* that this will hurt people's feelings.
*/
- close_socket(bfd);
+ close_ports_helper(bfds);
- bfd = bind_port_helper(config);
+ bind_ports_helper(config, bfds);
}
#ifdef FEATURE_TOGGLE
#ifdef FEATURE_ACL
if (block_acl(NULL,csp))
{
- log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
+ log_error(LOG_LEVEL_CONNECT,
+ "Connection from %s on %s (socket %d) dropped due to ACL",
+ csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
close_socket(csp->cfd);
freez(csp->ip_addr_str);
+ freez(csp->listen_addr_str);
freez(csp_list);
continue;
}
strlen(TOO_MANY_CONNECTIONS_RESPONSE));
close_socket(csp->cfd);
freez(csp->ip_addr_str);
+ freez(csp->listen_addr_str);
freez(csp_list);
continue;
}
#if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
#define SELECTED_ONE_OPTION
csp->cfd = ReleaseSocket(csp->cfd, -1);
-
+
#ifdef __amigaos4__
child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
NP_Output, Output(),
NP_StackSize, 200*1024,
TAG_DONE);
#endif
- if(0 != child_id)
+ if (0 != child_id)
{
childs++;
((struct Task *)child_id)->tc_UserData = csp;
serve(csp);
- /*
+ /*
* If we've been toggled or we've blocked the request, tell Mom
*/
}
#endif /* def FEATURE_TOGGLE */
-#ifdef FEATURE_STATISTICS
+#ifdef FEATURE_STATISTICS
if (csp->flags & CSP_FLAG_REJECTED)
{
rc |= RC_FLAG_BLOCKED;
int child_status;
#if !defined(_WIN32) && !defined(__CYGWIN__)
- wait( &child_status );
+ wait(&child_status);
- /*
+ /*
* Evaluate child's return code: If the child has
* - been toggled, toggle ourselves
* - blocked its request, bump up the stats counter
{
urls_rejected++;
}
-#endif /* def FEATURE_STATISTICS */
+#endif /* def FEATURE_STATISTICS */
#endif /* !defined(_WIN32) && defined(__CYGWIN__) */
close_socket(csp->cfd);
* XXX: If you assume ...
*/
log_error(LOG_LEVEL_ERROR,
- "Unable to take any additional connections: %E");
+ "Unable to take any additional connections: %E. Active threads: %d",
+ active_threads);
write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
strlen(TOO_MANY_CONNECTIONS_RESPONSE));
close_socket(csp->cfd);
projects / privoxy.git / blobdiff