-const char jcc_rcs[] = "$Id: jcc.c,v 1.305 2009/12/22 13:03:30 fabiankeil Exp $";
+const char jcc_rcs[] = "$Id: jcc.c,v 1.321 2010/07/12 16:01:23 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) 2001-2009 the SourceForge
+ * Copyright : Written by and Copyright (C) 2001-2010 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
const char jcc_h_rcs[] = JCC_H_VERSION;
const char project_h_rcs[] = PROJECT_H_VERSION;
-int no_daemon = 0;
+int daemon_mode = 1;
struct client_state clients[1];
struct file_list files[1];
"Connection: close\r\n\r\n"
"Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
-#if 0
-/* XXX: should be a template */
-static const char NULL_BYTE_RESPONSE[] =
- "HTTP/1.0 400 Bad request received from client\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
- "Content-Type: text/plain\r\n"
- "Connection: close\r\n\r\n"
- "Bad request. Null byte(s) before end of request.\r\n";
-#endif
-
/* XXX: should be a template */
static const char MESSED_UP_REQUEST_RESPONSE[] =
"HTTP/1.0 400 Malformed request after rewriting\r\n"
return "Internal error while searching for crunch reason";
}
- switch (rsp->reason)
+ switch (rsp->crunch_reason)
{
- case RSP_REASON_UNSUPPORTED:
+ case UNSUPPORTED:
reason = "Unsupported HTTP feature";
break;
- case RSP_REASON_BLOCKED:
+ case BLOCKED:
reason = "Blocked";
break;
- case RSP_REASON_UNTRUSTED:
+ case UNTRUSTED:
reason = "Untrusted";
break;
- case RSP_REASON_REDIRECTED:
+ case REDIRECTED:
reason = "Redirected";
break;
- case RSP_REASON_CGI_CALL:
+ case CGI_CALL:
reason = "CGI Call";
break;
- case RSP_REASON_NO_SUCH_DOMAIN:
+ case NO_SUCH_DOMAIN:
reason = "DNS failure";
break;
- case RSP_REASON_FORWARDING_FAILED:
+ case FORWARDING_FAILED:
reason = "Forwarding failed";
break;
- case RSP_REASON_CONNECT_FAILED:
+ case CONNECT_FAILED:
reason = "Connection failure";
break;
- case RSP_REASON_OUT_OF_MEMORY:
+ case OUT_OF_MEMORY:
reason = "Out of memory (may mask other reasons)";
break;
- case RSP_REASON_CONNECTION_TIMEOUT:
+ case CONNECTION_TIMEOUT:
reason = "Connection timeout";
break;
- case RSP_REASON_NO_SERVER_DATA:
+ case NO_SERVER_DATA:
reason = "No server data received";
break;
default:
if (rsp == NULL)
{
- /*
- * Not supposed to happen. If it does
- * anyway, treat it as an unknown error.
- */
- cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
- /* return code doesn't matter */
- }
-
- if (rsp == NULL)
- {
- /* If rsp is still NULL, we have serious internal problems. */
- log_error(LOG_LEVEL_FATAL,
- "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
+ log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
}
/*
* Extract the status code from the actual head
- * that was send to the client. It is the only
+ * that will be send to the client. It is the only
* way to get it right for all requests, including
* the fixed ones for out-of-memory problems.
*
}
-#if 0
-/*********************************************************************
- *
- * Function : request_contains_null_bytes
- *
- * Description : Checks for NULL bytes in the request and sends
- * an error message to the client if any were found.
- *
- * XXX: currently not used, see comment in chat().
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : buf = Data from the client's request to check.
- * 3 : len = The data length.
- *
- * Returns : TRUE if the request contained one or more NULL bytes, or
- * FALSE otherwise.
- *
- *********************************************************************/
-static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
-{
- size_t c_len; /* Request lenght when treated as C string */
-
- c_len = strlen(buf);
-
- if (c_len < len)
- {
- /*
- * Null byte(s) found. Log the request,
- * return an error response and hang up.
- */
- size_t tmp_len = c_len;
-
- do
- {
- /*
- * Replace NULL byte(s) with '°' characters
- * so the request can be logged as string.
- * XXX: Is there a better replacement character?
- */
- buf[tmp_len]='°';
- tmp_len += strlen(buf+tmp_len);
- } while (tmp_len < len);
-
- log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
- "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
- log_error(LOG_LEVEL_HEADER,
- "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
-
- write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
-
- /* XXX: Log correct size */
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
-
- return TRUE;
- }
-
- return FALSE;
-}
-#endif
-
-
/*********************************************************************
*
* Function : crunch_response_triggered
{
/* Deliver, log and free the interception response. */
send_crunch_response(csp, rsp);
+ csp->flags |= CSP_FLAG_CRUNCHED;
return TRUE;
}
{
/* Deliver, log and free the interception response. */
send_crunch_response(csp, rsp);
+ csp->flags |= CSP_FLAG_CRUNCHED;
#ifdef FEATURE_STATISTICS
if (c->flags & CF_COUNT_AS_REJECT)
{
content_length_known = TRUE;
}
- if (csp->http->status == 304)
+ if (csp->http->status == 204 || csp->http->status == 304)
{
/*
* Expect no body. XXX: incomplete "list" of status codes?
*
* Function : chat
*
- * Description : Once a connection to the client has been accepted,
+ * Description : Once a connection from the client has been accepted,
* this function is called (via serve()) to handle the
- * main business of the communication. When this
- * function returns, the caller must close the client
- * socket handle.
+ * main business of the communication. This function
+ * returns after dealing with a single request. It can
+ * be called multiple times witht 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.
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
- && socket_is_still_usable(csp->server_connection.sfd)
+ && socket_is_still_alive(csp->server_connection.sfd)
&& connection_destination_matches(&csp->server_connection, http, fwd))
{
log_error(LOG_LEVEL_CONNECT,
if (FD_ISSET(csp->server_connection.sfd, &rfds))
{
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- if (!socket_is_still_usable(csp->cfd))
+ if (!socket_is_still_alive(csp->cfd))
{
#ifdef _WIN32
log_error(LOG_LEVEL_CONNECT,
{
log_error(LOG_LEVEL_ERROR,
"Empty server or forwarder response received on socket %d. "
- "Closing client connection %d without sending data.",
+ "Closing client socket %d without sending data.",
csp->server_connection.sfd, csp->cfd);
}
else
}
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+/*********************************************************************
+ *
+ * Function : prepare_csp_for_next_request
+ *
+ * Description : Put the csp in a mostly vergin state.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : N/A
+ *
+ *********************************************************************/
+static void prepare_csp_for_next_request(struct client_state *csp)
+{
+ csp->content_type = 0;
+ csp->content_length = 0;
+ 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));
+ freez(csp->error_message);
+ free_http_request(csp->http);
+ destroy_list(csp->headers);
+ destroy_list(csp->tags);
+ free_current_action(csp->action);
+ if (NULL != csp->fwd)
+ {
+ unload_forward_spec(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;
+}
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+
/*********************************************************************
*
* Function : serve
chat(csp);
+ /*
+ * If the request has been crunched,
+ * the calculated latency is zero.
+ */
latency = (unsigned)(csp->server_connection.response_received -
csp->server_connection.request_sent) / 2;
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->cfd != JB_INVALID_SOCKET)
- && (csp->server_connection.sfd != JB_INVALID_SOCKET)
- && socket_is_still_usable(csp->server_connection.sfd);
+ && (((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
+ && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
+ || (csp->flags & CSP_FLAG_CRUNCHED))
+ && (csp->cfd != JB_INVALID_SOCKET);
- if (continue_chatting)
+ if (continue_chatting && !(csp->flags & CSP_FLAG_CRUNCHED))
{
- if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
+ continue_chatting = (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ && socket_is_still_alive(csp->server_connection.sfd);
+ if (continue_chatting)
{
- 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);
+ if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
+ {
+ 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);
+ }
+ continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
}
- continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
}
if (continue_chatting)
{
unsigned int client_timeout;
- 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);
+ if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ {
+ 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);
+ }
+ else
+ {
+ 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->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
&& data_is_available(csp->cfd, (int)client_timeout)
- && socket_is_still_usable(csp->cfd))
+ && socket_is_still_alive(csp->cfd))
{
log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
"time or the client closed the connection on socket %d.",
csp->cfd);
- /*
- * Get the csp in a mostly vergin state again.
- * XXX: Should be done elsewhere.
- */
- csp->content_type = 0;
- csp->content_length = 0;
- 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));
- freez(csp->error_message);
- free_http_request(csp->http);
- destroy_list(csp->headers);
- destroy_list(csp->tags);
- free_current_action(csp->action);
- if (NULL != csp->fwd)
- {
- unload_forward_spec(csp->fwd);
- csp->fwd = NULL;
- }
-
- /* XXX: Store per-connection flags someplace else. */
- csp->flags = CSP_FLAG_ACTIVE |
- (csp->flags & CSP_FLAG_TOGGLED_ON) | CSP_FLAG_REUSED_CLIENT_CONNECTION;
+ prepare_csp_for_next_request(csp);
}
else
{
csp->cfd);
#ifdef FEATURE_CONNECTION_SHARING
if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
- && (socket_is_still_usable(csp->server_connection.sfd)))
+ && (socket_is_still_alive(csp->server_connection.sfd)))
{
time_t time_open = time(NULL) - csp->server_connection.timestamp;
else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
{
set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
- no_daemon = 1;
+ daemon_mode = 0;
}
else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
*/
#if defined(unix)
{
- pid_t pid = 0;
-#if 0
- int fd;
-#endif
-
- if (!no_daemon)
+ if (daemon_mode)
{
- pid = fork();
+ int fd;
+ pid_t pid = fork();
if ( pid < 0 ) /* error */
{
exit( 0 );
}
/* child */
-#if 1
- /* Should be more portable, but not as well tested */
+
setsid();
-#else /* !1 */
-#ifdef __FreeBSD__
- setpgrp(0,0);
-#else /* ndef __FreeBSD__ */
- setpgrp();
-#endif /* ndef __FreeBSD__ */
- fd = open("/dev/tty", O_RDONLY);
- if ( fd )
- {
- /* no error check here */
- ioctl( fd, TIOCNOTTY,0 );
- close ( fd );
- }
-#endif /* 1 */
+
/*
* stderr (fd 2) will be closed later on,
* when the config file has been parsed.
*/
+ close(0);
+ close(1);
+
+ /*
+ * Reserve fd 0 and 1 to prevent abort() and friends
+ * from sending stuff to the clients or servers.
+ */
+ fd = open("/dev/null", O_RDONLY);
+ if (fd == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
+ }
+ else if (fd != 0)
+ {
+ if (dup2(fd, 0) == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
+ }
+ close(fd);
+ }
+ fd = open("/dev/null", O_WRONLY);
+ if (fd == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
+ }
+ else if (fd != 1)
+ {
+ if (dup2(fd, 1) == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
+ }
+ close(fd);
+ }
- close( 0 );
- close( 1 );
chdir("/");
- } /* -END- if (!no_daemon) */
+ } /* -END- if (daemon_mode) */
/*
* As soon as we have written the PID file, we can switch
projects / privoxy.git / blobdiff