-const char jcc_rcs[] = "$Id: jcc.c,v 1.447 2016/09/27 22:48:28 ler762 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) 2001-2016 the
+ * Copyright : Written by and Copyright (C) 2001-2018 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
# ifdef __OS2__
#define INCL_DOS
# include <os2.h>
-#define bzero(B,N) memset(B,0x00,n)
# endif
+#ifdef HAVE_POLL
+#ifdef __GLIBC__
+#include <sys/poll.h>
+#else
+#include <poll.h>
+#endif /* def __GLIBC__ */
+#else
# ifndef FD_ZERO
# include <select.h>
# endif
+#warning poll() appears to be unavailable. Your platform will become unsupported in the future.
+#endif /* HAVE_POLL */
#endif
#include "client-tags.h"
#endif
-const char jcc_h_rcs[] = JCC_H_VERSION;
-const char project_h_rcs[] = PROJECT_H_VERSION;
-
int daemon_mode = 1;
struct client_states clients[1];
struct file_list files[1];
int g_terminate = 0;
#endif
-#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+#if !defined(_WIN32) && !defined(__OS2__)
static void sig_handler(int the_signal);
#endif
static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
static void usage(const char *myname);
#endif
static void initialize_mutexes(void);
-static jb_socket bind_port_helper(const char *haddr, int hport);
+static jb_socket bind_port_helper(const char *haddr, int hport, int backlog);
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
-void serve(struct client_state *csp);
-#else /* ifndef AMIGA */
static void serve(struct client_state *csp);
-#endif /* def AMIGA */
#ifdef __BEOS__
static int32 server_thread(void *data);
#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 localtime_mutex;
#endif /* ndef HAVE_GMTIME_R */
-#ifndef HAVE_RANDOM
+#if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
privoxy_mutex_t rand_mutex;
-#endif /* ndef HAVE_RANDOM */
+#endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
#endif /* def MUTEX_LOCKS_AVAILABLE */
*
* here?
*/
-#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+#if !defined(_WIN32) && !defined(__OS2__)
/*********************************************************************
*
* Function : sig_handler
#endif
+/*********************************************************************
+ *
+ * Function : get_write_delay
+ *
+ * Description : Parse the delay-response parameter.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Number of milliseconds to delay writes.
+ *
+ *********************************************************************/
+static unsigned int get_write_delay(const struct client_state *csp)
+{
+ unsigned int delay;
+ char *endptr;
+ char *newval;
+
+ if ((csp->action->flags & ACTION_DELAY_RESPONSE) == 0)
+ {
+ return 0;
+ }
+ newval = csp->action->string[ACTION_STRING_DELAY_RESPONSE];
+
+ delay = (unsigned)strtol(newval, &endptr, 0);
+ if (*endptr != '\0')
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Invalid delay-response{} parameter: '%s'", newval);
+ }
+
+ return delay;
+
+}
+
+
/*********************************************************************
*
* Function : client_protocol_is_unsupported
log_error(LOG_LEVEL_CLF,
"%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
freez(req);
- write_socket(csp->cfd, response, strlen(response));
+ write_socket_delayed(csp->cfd, response, strlen(response),
+ get_write_delay(csp));
return TRUE;
}
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));
+ write_socket_delayed(csp->cfd,
+ UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
+ strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE),
+ get_write_delay(csp));
return TRUE;
}
log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
csp->ip_addr_str, csp->http->cmd);
- write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
+ get_write_delay(csp));
destroy_list(headers);
return JB_ERR_PARSE;
csp->ip_addr_str, csp->http->cmd, req);
freez(req);
- write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
+ write_socket_delayed(csp->cfd, MISSING_DESTINATION_RESPONSE,
+ strlen(MISSING_DESTINATION_RESPONSE), get_write_delay(csp));
destroy_list(headers);
return JB_ERR_PARSE;
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
- * 1 : rsp = Fully prepared response. Will be freed on exit.
+ * 2 : rsp = Fully prepared response. Will be freed on exit.
*
* Returns : Nothing.
*
csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
/* Write the answer to the client */
- if (write_socket(csp->cfd, rsp->head, rsp->head_length)
- || write_socket(csp->cfd, rsp->body, rsp->content_length))
+ if (write_socket_delayed(csp->cfd, rsp->head, rsp->head_length, get_write_delay(csp))
+ || write_socket_delayed(csp->cfd, rsp->body, rsp->content_length, get_write_delay(csp)))
{
/* There is nothing we can do about it. */
- log_error(LOG_LEVEL_ERROR,
- "Couldn't deliver the error message through client socket %d: %E",
- csp->cfd);
+ log_error(LOG_LEVEL_CONNECT,
+ "Couldn't deliver the error message for %s through client socket %d: %E",
+ http->url, csp->cfd);
}
/* Clean up and return */
* 1 : sfd = Open socket to remember.
* 2 : http = The destination for the connection.
* 3 : fwd = The forwarder settings used.
- * 3 : server_connection = storage.
+ * 4 : server_connection = storage.
*
* Returns : void
*
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)
+ )
{
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));
+ write_socket_delayed(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
+ strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE),
+ get_write_delay(csp));
}
else
{
enum chunk_status status;
while (CHUNK_STATUS_MISSING_DATA ==
- (status = chunked_body_is_complete(csp->client_iob,&body_length)))
+ (status = chunked_body_is_complete(csp->client_iob, &body_length)))
{
char buf[BUFFER_SIZE];
int len;
}
if (status != CHUNK_STATUS_BODY_COMPLETE)
{
- write_socket(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
- strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE));
+ write_socket_delayed(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
+ strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE), get_write_delay(csp));
log_error(LOG_LEVEL_CLF,
"%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
return JB_ERR_PARSE;
}
+#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
/*********************************************************************
*
freez(req);
if (JB_ERR_OK != err)
{
- write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ 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,
}
verify_request_length(csp);
}
+ else
+ {
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ }
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
err = sed(csp, FILTER_CLIENT_HEADERS);
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));
+ write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
return JB_ERR_PARSE;
}
csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
/*
* A header filter broke the request line - bail out.
*/
- write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
+ write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
+ strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
/* XXX: Use correct size */
log_error(LOG_LEVEL_CLF,
"%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
}
+/*********************************************************************
+ *
+ * Function : send_http_request
+ *
+ * Description : Sends the HTTP headers from the client request
+ * and all the body data that has already been received.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * 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_iob(csp->server_connection.sfd, csp->client_iob, 0) < 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
* Returns : Nothing.
*
*********************************************************************/
-static void handle_established_connection(struct client_state *csp,
- const struct forward_spec *fwd)
+static void handle_established_connection(struct client_state *csp)
{
- char buf[BUFFER_SIZE];
char *hdr;
char *p;
- fd_set rfds;
int n;
+#ifdef HAVE_POLL
+ struct pollfd poll_fds[2];
+#else
+ fd_set rfds;
jb_socket maxfd;
+ struct timeval timeout;
+#endif
int server_body;
int ms_iis5_hack = 0;
unsigned long long byte_count = 0;
struct http_request *http;
long len = 0; /* for buffer sizes (and negative error codes) */
int buffer_and_filter_content = 0;
+ unsigned int write_delay;
/* Skeleton for HTTP response, if we should intercept the request */
struct http_response *rsp;
- struct timeval timeout;
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
int watch_client_socket;
#endif
- memset(buf, 0, sizeof(buf));
+ csp->receive_buffer_size = csp->config->receive_buffer_size;
+ csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
+ if (csp->receive_buffer == NULL)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Out of memory. Failed to allocate the receive buffer.");
+ rsp = cgi_error_memory();
+ send_crunch_response(csp, rsp);
+ return;
+ }
http = csp->http;
+#ifndef HAVE_POLL
maxfd = (csp->cfd > csp->server_connection.sfd) ?
csp->cfd : csp->server_connection.sfd;
+#endif
/* pass data between the client and server
* until one or the other shuts down the connection.
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
#endif
+ write_delay = get_write_delay(csp);
for (;;)
{
+#ifndef HAVE_POLL
#ifdef __OS2__
/*
* FD_ZERO here seems to point to an errant macro which crashes.
}
FD_SET(csp->server_connection.sfd, &rfds);
+#endif /* ndef HAVE_POLL */
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
if ((csp->flags & CSP_FLAG_CHUNKED)
}
#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+#ifdef HAVE_POLL
+ poll_fds[0].fd = csp->cfd;
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (!watch_client_socket)
+ {
+ /*
+ * Ignore incoming data, but still watch out
+ * for disconnects etc. These flags are always
+ * implied anyway but explicitly setting them
+ * doesn't hurt.
+ */
+ poll_fds[0].events = POLLERR|POLLHUP;
+ }
+ else
+#endif
+ {
+ poll_fds[0].events = POLLIN;
+ }
+ poll_fds[1].fd = csp->server_connection.sfd;
+ poll_fds[1].events = POLLIN;
+ n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
+#else
timeout.tv_sec = csp->config->socket_timeout;
timeout.tv_usec = 0;
n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
+#endif /* def HAVE_POLL */
if (n == 0)
{
- log_error(LOG_LEVEL_ERROR,
- "Didn't receive data in time: %s", http->url);
+ log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
+ csp->config->socket_timeout, http->url);
if ((byte_count == 0) && (http->ssl == 0))
{
send_crunch_response(csp, error_response(csp, "connection-timeout"));
}
else if (n < 0)
{
+#ifdef HAVE_POLL
+ log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
+#else
log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
+#endif
mark_server_socket_tainted(csp);
return;
}
* XXX: Make sure the client doesn't use pipelining
* behind Privoxy's back.
*/
+#ifdef HAVE_POLL
+ if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "The client socket %d has become unusable while "
+ "the server socket %d is still open.",
+ csp->cfd, csp->server_connection.sfd);
+ mark_server_socket_tainted(csp);
+ break;
+ }
+
+ if (poll_fds[0].revents != 0)
+#else
if (FD_ISSET(csp->cfd, &rfds))
+#endif /* def HAVE_POLL*/
{
- int max_bytes_to_read = sizeof(buf) - 1;
+ int max_bytes_to_read = (int)csp->receive_buffer_size;
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
*/
watch_client_socket = 0;
log_error(LOG_LEVEL_CONNECT,
- "Stopping to watch the client socket %d. "
+ "Stop watching client socket %d. "
"There's already another request waiting.",
csp->cfd);
continue;
}
if (csp->expected_client_content_length != 0)
{
- if (csp->expected_client_content_length < (sizeof(buf) - 1))
+ if (csp->expected_client_content_length < csp->receive_buffer_size)
{
max_bytes_to_read = (int)csp->expected_client_content_length;
}
"Waiting for up to %d bytes from the client.",
max_bytes_to_read);
}
- assert(max_bytes_to_read < sizeof(buf));
+ assert(max_bytes_to_read <= csp->receive_buffer_size);
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- len = read_socket(csp->cfd, buf, max_bytes_to_read);
+ len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
if (len <= 0)
{
}
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
+ if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
{
log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
mark_server_socket_tainted(csp);
* If `hdr' is null, then it's the header otherwise it's the body.
* FIXME: Does `hdr' really mean `host'? No.
*/
+#ifdef HAVE_POLL
+ if (poll_fds[1].revents != 0)
+#else
if (FD_ISSET(csp->server_connection.sfd, &rfds))
+#endif /* HAVE_POLL */
{
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
/*
}
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
+ len = read_socket(csp->server_connection.sfd, csp->receive_buffer, (int)csp->receive_buffer_size);
if (len < 0)
{
log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
- if (http->ssl && (fwd->forward_host == NULL))
+ if (http->ssl && (csp->fwd == NULL))
{
/*
* Just hang up. We already confirmed the client's CONNECT
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
if (csp->flags & CSP_FLAG_CHUNKED)
{
- if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
+ if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
{
/* XXX: this is a temporary hack */
log_error(LOG_LEVEL_CONNECT,
reading_done:
#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+ /*
+ * This is guaranteed by allocating with zalloc_or_die()
+ * and never (intentionally) writing to the last byte.
+ *
+ * csp->receive_buffer_size is the size of the part of the
+ * buffer we intentionally write to, but we actually
+ * allocated csp->receive_buffer_size+1 bytes so the assertion
+ * stays within the allocated range.
+ */
+ assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
+
/*
* Add a trailing zero to let be able to use string operations.
* XXX: do we still need this with filter_popups gone?
*/
- buf[len] = '\0';
+ assert(len <= csp->receive_buffer_size);
+ csp->receive_buffer[len] = '\0';
/*
* Normally, this would indicate that we've read
log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
}
- if (write_socket(csp->cfd, hdr, strlen(hdr))
- || write_socket(csp->cfd,
- ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
+ if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
+ || write_socket_delayed(csp->cfd,
+ ((p != NULL) ? p : csp->iob->cur),
+ (size_t)csp->content_length, write_delay))
{
log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
freez(hdr);
* This is NOT the body, so
* Let's pretend the server just sent us a blank line.
*/
- snprintf(buf, sizeof(buf), "\r\n");
- len = (int)strlen(buf);
+ snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
+ len = (int)strlen(csp->receive_buffer);
/*
* Now, let the normal header parsing algorithm below do its
* 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->iob, csp->config->buffer_limit, buf, len))
+ if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
{
size_t hdrlen;
long flushed;
}
hdrlen = strlen(hdr);
- if (write_socket(csp->cfd, hdr, hdrlen)
- || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
- || (write_socket(csp->cfd, buf, (size_t)len)))
+ if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
+ || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay) < 0)
+ || (write_socket_delayed(csp->cfd, csp->receive_buffer,
+ (size_t)len, write_delay))))
{
log_error(LOG_LEVEL_CONNECT,
"Flush header and buffers to client failed: %E");
}
else
{
- if (write_socket(csp->cfd, buf, (size_t)len))
+ if (write_socket_delayed(csp->cfd, csp->receive_buffer,
+ (size_t)len, write_delay))
{
log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
mark_server_socket_tainted(csp);
* 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->iob, csp->config->buffer_limit, buf, len))
+ if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
{
log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
rsp = cgi_error_memory();
"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));
+ write_socket_delayed(csp->cfd,
+ INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
mark_server_socket_tainted(csp);
return;
}
csp->headers->first->str);
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));
+ write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
free_http_request(http);
mark_server_socket_tainted(csp);
return;
{
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));
+ write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
free_http_request(http);
mark_server_socket_tainted(csp);
return;
* delivered the crunch response to the client
* and are done here after cleaning up.
*/
- freez(hdr);
- mark_server_socket_tainted(csp);
- return;
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+ return;
}
/* Buffer and pcrs filter this if appropriate. */
* may be in the buffer)
*/
- if (write_socket(csp->cfd, hdr, strlen(hdr))
- || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
+ if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
+ || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
{
log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
"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));
+ write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
mark_server_socket_tainted(csp);
return;
}
csp->server_connection.timestamp = time(NULL);
}
+
/*********************************************************************
*
* Function : chat
*********************************************************************/
static void chat(struct client_state *csp)
{
- char buf[BUFFER_SIZE];
- char *hdr;
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)
}
else if (fwd->forward_host || (http->ssl == 0))
{
- 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", 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", http->hostport);
- }
-
- if (write_failure)
+ if (send_http_request(csp))
{
rsp = error_response(csp, "connect-failed");
if (rsp)
* message to the client, flush the rest, and get out of the way.
*/
list_remove_all(csp->headers);
- if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
+ if (write_socket_delayed(csp->cfd, CSUCCEED,
+ strlen(CSUCCEED), get_write_delay(csp)))
{
return;
}
/* XXX: should the time start earlier for optimistically sent data? */
csp->server_connection.request_sent = time(NULL);
- handle_established_connection(csp, fwd);
+ handle_established_connection(csp);
+ freez(csp->receive_buffer);
+}
+
+
+#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)
+ {
+ /* XXX: Doesn'T work yet. */
+ csp->server_connection.sfd = 0;
+ }
+ 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->fwd = &fwd;
+ csp->content_type |= CT_GIF;
+ csp->action->flags |= ACTION_DEANIMATE;
+ csp->action->string[ACTION_STRING_DEANIMATE] = "last";
+
+ 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->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);
+ freez(csp->receive_buffer);
+
+ return 0;
}
+#endif
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
* Returns : N/A
*
*********************************************************************/
-#ifdef AMIGA
-void serve(struct client_state *csp)
-#else /* ifndef AMIGA */
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
drain_and_close_socket(csp->cfd);
}
+ free_csp_resources(csp);
+
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 [--config-test] "
#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(&localtime_mutex);
#endif /* ndef HAVE_GMTIME_R */
-#ifndef HAVE_RANDOM
+#if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
privoxy_mutex_init(&rand_mutex);
-#endif /* ndef HAVE_RANDOM */
+#endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
#endif /* def MUTEX_LOCKS_AVAILABLE */
}
-
/*********************************************************************
*
* Function : main
{
int argc_pos = 0;
int do_config_test = 0;
+#ifndef HAVE_ARC4RANDOM
unsigned int random_seed;
+#endif
#ifdef unix
struct passwd *pw = NULL;
struct group *grp = 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;
{
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)
{
/*
clients->next = NULL;
/* XXX: factor out initialising after the next stable release. */
-#ifdef AMIGA
- InitAmiga();
-#elif defined(_WIN32)
+#ifdef _WIN32
InitWin32();
#endif
+#ifndef HAVE_ARC4RANDOM
random_seed = (unsigned int)time(NULL);
#ifdef HAVE_RANDOM
srandom(random_seed);
#else
srand(random_seed);
#endif /* ifdef HAVE_RANDOM */
+#endif /* ifndef HAVE_ARC4RANDOM */
/*
* Unix signal handling
*
* 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)
+#if !defined(_WIN32) && !defined(__OS2__)
{
int idx;
const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
# endif /* def _WIN_CONSOLE */
#endif /* def _WIN32 */
+#ifdef FUZZ
+ if (fuzz_input_type != NULL)
+ {
+ exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
+ }
+ log_error(LOG_LEVEL_FATAL,
+ "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
+ "Various data structures are static which is unsafe when using threads.");
+#endif
+
if (do_config_test)
{
exit(NULL == load_config());
* As soon as we have written the PID file, we can switch
* to the user and group ID indicated by the --user option
*/
- write_pid_file();
-
+ if (pidfile != NULL)
+ {
+ write_pid_file(pidfile);
+ }
if (NULL != pw)
{
if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
* 1 : haddr = Host address to bind to. Use NULL to bind to
* INADDR_ANY.
* 2 : hport = Specifies port to bind to.
+ * 3 : backlog = Listen backlog.
*
* Returns : Port that was opened.
*
*********************************************************************/
-static jb_socket bind_port_helper(const char *haddr, int hport)
+static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
{
int result;
jb_socket bfd;
- result = bind_port(haddr, hport, &bfd);
+ result = bind_port(haddr, hport, backlog, &bfd);
if (result < 0)
{
return JB_INVALID_SOCKET;
}
+#ifndef HAVE_POLL
#ifndef _WIN32
if (bfd >= FD_SETSIZE)
{
"Bind socket number too high to use select(): %d >= %d",
bfd, FD_SETSIZE);
}
+#endif
#endif
if (haddr == NULL)
{
if (config->hport[i])
{
- sockets[i] = bind_port_helper(config->haddr[i], config->hport[i]);
+ sockets[i] = bind_port_helper(config->haddr[i],
+ config->hport[i], config->listen_backlog);
+#if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
+ if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
+ {
+ struct accept_filter_arg af_options;
+ bzero(&af_options, sizeof(af_options));
+ strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
+ if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
+ sizeof(af_options)))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Enabling accept filter for socket %d failed: %E", sockets[i]);
+ }
+ }
+#endif
}
else
{
jb_socket bfds[MAX_LISTENING_SOCKETS];
struct configuration_spec *config;
unsigned int active_threads = 0;
+#if defined(FEATURE_PTHREAD)
+ pthread_attr_t attrs;
+
+ pthread_attr_init(&attrs);
+ pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
+#endif
config = load_config();
for (;;)
#endif
{
-#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
+#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(__OS2__)
while (waitpid(-1, NULL, WNOHANG) > 0)
{
/* zombie children */
}
-#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
+#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
/*
* Free data that was used by died threads
if (!accept_connection(csp, bfds))
{
log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
-
-#ifdef AMIGA
- if (!childs)
- {
- exit(1);
- }
-#endif
freez(csp_list);
continue;
}
* new one.
*
* Which-ever is correct, we will serve 1 more page via the
- * old settings. This should probably be a "show-proxy-args"
+ * old settings. This should probably be a "show-status"
* request. This should not be a so common of an operation
* that this will hurt people's feelings.
*/
log_error(LOG_LEVEL_CONNECT,
"Rejecting connection from %s. Maximum number of connections reached.",
csp->ip_addr_str);
- write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
- strlen(TOO_MANY_CONNECTIONS_RESPONSE));
+ write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
+ strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
close_socket(csp->cfd);
freez(csp->ip_addr_str);
freez(csp->listen_addr_str);
#define SELECTED_ONE_OPTION
{
pthread_t the_thread;
- pthread_attr_t attrs;
- pthread_attr_init(&attrs);
- pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
errno = pthread_create(&the_thread, &attrs,
(void * (*)(void *))serve, csp);
child_id = errno ? -1 : 0;
- pthread_attr_destroy(&attrs);
}
#endif
}
#endif
-#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_CloseOutput, FALSE,
- NP_Name, (ULONG)"privoxy child",
- NP_Child, TRUE,
- TAG_DONE);
-#else
- child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
- NP_Output, Output(),
- NP_CloseOutput, FALSE,
- NP_Name, (ULONG)"privoxy child",
- NP_StackSize, 200*1024,
- TAG_DONE);
-#endif
- if (0 != child_id)
- {
- childs++;
- ((struct Task *)child_id)->tc_UserData = csp;
- Signal((struct Task *)child_id, SIGF_SINGLE);
- Wait(SIGF_SINGLE);
- }
-#endif
-
#if !defined(SELECTED_ONE_OPTION)
child_id = fork();
log_error(LOG_LEVEL_ERROR,
"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));
+ write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
+ strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
close_socket(csp->cfd);
csp->flags &= ~CSP_FLAG_ACTIVE;
}
}
}
+#if defined(FEATURE_PTHREAD)
+ pthread_attr_destroy(&attrs);
+#endif
+
/* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
/* Clean up. Aim: free all memory (no leaks) */
projects / privoxy.git / blobdiff