-const char gateway_rcs[] = "$Id: gateway.c,v 1.62 2009/09/22 11:35:52 fabiankeil Exp $";
+const char gateway_rcs[] = "$Id: gateway.c,v 1.93 2012/12/07 12:45:20 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/gateway.c,v $
#include "jbsockets.h"
#include "gateway.h"
#include "miscutil.h"
+#include "list.h"
+#include "parsers.h"
+
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
#ifdef HAVE_POLL
-#ifdef __GLIBC__
+#ifdef __GLIBC__
#include <sys/poll.h>
#else
#include <poll.h>
int target_port,
struct client_state *csp);
+enum {
+ SOCKS4_REQUEST_GRANTED = 90,
+ SOCKS4_REQUEST_REJECT = 91,
+ SOCKS4_REQUEST_IDENT_FAILED = 92,
+ SOCKS4_REQUEST_IDENT_CONFLICT = 93
+};
-#define SOCKS_REQUEST_GRANTED 90
-#define SOCKS_REQUEST_REJECT 91
-#define SOCKS_REQUEST_IDENT_FAILED 92
-#define SOCKS_REQUEST_IDENT_CONFLICT 93
-
-#define SOCKS5_REQUEST_GRANTED 0
-#define SOCKS5_REQUEST_FAILED 1
-#define SOCKS5_REQUEST_DENIED 2
-#define SOCKS5_REQUEST_NETWORK_UNREACHABLE 3
-#define SOCKS5_REQUEST_HOST_UNREACHABLE 4
-#define SOCKS5_REQUEST_CONNECTION_REFUSED 5
-#define SOCKS5_REQUEST_TTL_EXPIRED 6
-#define SOCKS5_REQUEST_PROTOCOL_ERROR 7
-#define SOCKS5_REQUEST_BAD_ADDRESS_TYPE 8
+enum {
+ SOCKS5_REQUEST_GRANTED = 0,
+ SOCKS5_REQUEST_FAILED = 1,
+ SOCKS5_REQUEST_DENIED = 2,
+ SOCKS5_REQUEST_NETWORK_UNREACHABLE = 3,
+ SOCKS5_REQUEST_HOST_UNREACHABLE = 4,
+ SOCKS5_REQUEST_CONNECTION_REFUSED = 5,
+ SOCKS5_REQUEST_TTL_EXPIRED = 6,
+ SOCKS5_REQUEST_PROTOCOL_ERROR = 7,
+ SOCKS5_REQUEST_BAD_ADDRESS_TYPE = 8
+};
/* structure of a socks client operation */
struct socks_op {
*
* Function : remember_connection
*
- * Description : Remembers a connection for reuse later on.
+ * Description : Remembers a server connection for reuse later on.
*
* Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : fwd = The forwarder settings used.
+ * 1 : connection = The server connection to remember.
*
* Returns : void
*
*********************************************************************/
-void remember_connection(const struct client_state *csp, const struct forward_spec *fwd)
+void remember_connection(const struct reusable_connection *connection)
{
unsigned int slot = 0;
int free_slot_found = FALSE;
- const struct reusable_connection *connection = &csp->server_connection;
- const struct http_request *http = csp->http;
+ assert(NULL != connection);
assert(connection->sfd != JB_INVALID_SOCKET);
if (mark_connection_unused(connection))
assert(reusable_connection[slot].in_use == 0);
log_error(LOG_LEVEL_CONNECT,
"Remembering socket %d for %s:%d in slot %d.",
- connection->sfd, http->host, http->port, slot);
+ connection->sfd, connection->host, connection->port, slot);
free_slot_found = TRUE;
break;
}
if (!free_slot_found)
{
log_error(LOG_LEVEL_CONNECT,
- "No free slots found to remembering socket for %s:%d. Last slot %d.",
- http->host, http->port, slot);
+ "No free slots found to remember socket for %s:%d. Last slot %d.",
+ connection->host, connection->port, slot);
privoxy_mutex_unlock(&connection_reuse_mutex);
close_socket(connection->sfd);
return;
}
- assert(NULL != http->host);
- reusable_connection[slot].host = strdup(http->host);
- if (NULL == reusable_connection[slot].host)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory saving socket.");
- }
+ assert(NULL != connection->host);
+ reusable_connection[slot].host = strdup_or_die(connection->host);
reusable_connection[slot].sfd = connection->sfd;
- reusable_connection[slot].port = http->port;
+ reusable_connection[slot].port = connection->port;
reusable_connection[slot].in_use = 0;
reusable_connection[slot].timestamp = connection->timestamp;
- reusable_connection->request_sent = connection->request_sent;
- reusable_connection->response_received = connection->response_received;
+ reusable_connection[slot].request_sent = connection->request_sent;
+ reusable_connection[slot].response_received = connection->response_received;
reusable_connection[slot].keep_alive_timeout = connection->keep_alive_timeout;
+ reusable_connection[slot].requests_sent_total = connection->requests_sent_total;
- assert(NULL != fwd);
assert(reusable_connection[slot].gateway_host == NULL);
assert(reusable_connection[slot].gateway_port == 0);
assert(reusable_connection[slot].forwarder_type == SOCKS_NONE);
assert(reusable_connection[slot].forward_host == NULL);
assert(reusable_connection[slot].forward_port == 0);
- reusable_connection[slot].forwarder_type = fwd->type;
- if (NULL != fwd->gateway_host)
+ reusable_connection[slot].forwarder_type = connection->forwarder_type;
+ if (NULL != connection->gateway_host)
{
- reusable_connection[slot].gateway_host = strdup(fwd->gateway_host);
- if (NULL == reusable_connection[slot].gateway_host)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory saving gateway_host.");
- }
+ reusable_connection[slot].gateway_host = strdup_or_die(connection->gateway_host);
}
else
{
reusable_connection[slot].gateway_host = NULL;
}
- reusable_connection[slot].gateway_port = fwd->gateway_port;
+ reusable_connection[slot].gateway_port = connection->gateway_port;
- if (NULL != fwd->forward_host)
+ if (NULL != connection->forward_host)
{
- reusable_connection[slot].forward_host = strdup(fwd->forward_host);
- if (NULL == reusable_connection[slot].forward_host)
- {
- log_error(LOG_LEVEL_FATAL, "Out of memory saving forward_host.");
- }
+ reusable_connection[slot].forward_host = strdup_or_die(connection->forward_host);
}
else
{
reusable_connection[slot].forward_host = NULL;
}
- reusable_connection[slot].forward_port = fwd->forward_port;
+ reusable_connection[slot].forward_port = connection->forward_port;
privoxy_mutex_unlock(&connection_reuse_mutex);
}
#endif /* def FEATURE_CONNECTION_SHARING */
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
/*********************************************************************
*
* Function : mark_connection_closed
closed_connection->request_sent = 0;
closed_connection->response_received = 0;
closed_connection->keep_alive_timeout = 0;
+ closed_connection->requests_sent_total = 0;
closed_connection->forwarder_type = SOCKS_NONE;
freez(closed_connection->gateway_host);
closed_connection->gateway_port = 0;
freez(closed_connection->forward_host);
closed_connection->forward_port = 0;
}
-#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
#ifdef FEATURE_CONNECTION_SHARING
sfd, reusable_connection[slot].host,
reusable_connection[slot].port, slot);
mark_connection_closed(&reusable_connection[slot]);
- privoxy_mutex_unlock(&connection_reuse_mutex);
-
- return;
+ break;
}
}
- log_error(LOG_LEVEL_CONNECT,
- "Socket %d already forgotten or never remembered.", sfd);
-
privoxy_mutex_unlock(&connection_reuse_mutex);
+
}
#endif /* def FEATURE_CONNECTION_SHARING */
&& strcmpic(connection->gateway_host, fwd->gateway_host))
&& (connection->gateway_host != fwd->gateway_host))
{
- log_error(LOG_LEVEL_CONNECT, "Gateway mismatch.");
+ log_error(LOG_LEVEL_CONNECT,
+ "Gateway mismatch. Previous gateway: %s. Current gateway: %s",
+ connection->gateway_host, fwd->gateway_host);
return FALSE;
}
&& strcmpic(connection->forward_host, fwd->forward_host))
&& (connection->forward_host != fwd->forward_host))
{
- log_error(LOG_LEVEL_CONNECT, "Forwarding proxy mismatch.");
+ log_error(LOG_LEVEL_CONNECT,
+ "Forwarding proxy mismatch. Previous proxy: %s. Current proxy: %s",
+ connection->forward_host, fwd->forward_host);
return FALSE;
}
close_socket(reusable_connection[slot].sfd);
mark_connection_closed(&reusable_connection[slot]);
}
- else if (!socket_is_still_usable(reusable_connection[slot].sfd))
+ else if (!socket_is_still_alive(reusable_connection[slot].sfd))
{
log_error(LOG_LEVEL_CONNECT,
"The connection to %s:%d in slot %d is no longer usable. "
reusable_connection[slot].in_use = TRUE;
sfd = reusable_connection[slot].sfd;
log_error(LOG_LEVEL_CONNECT,
- "Found reusable socket %d for %s:%d in slot %d. "
- "Timestamp made %d seconds ago. Timeout: %d. Latency: %d.",
+ "Found reusable socket %d for %s:%d in slot %d. Timestamp made %d "
+ "seconds ago. Timeout: %d. Latency: %d. Requests served: %d",
sfd, reusable_connection[slot].host, reusable_connection[slot].port,
slot, time(NULL) - reusable_connection[slot].timestamp,
reusable_connection[slot].keep_alive_timeout,
(int)(reusable_connection[slot].response_received -
- reusable_connection[slot].request_sent));
+ reusable_connection[slot].request_sent),
+ reusable_connection[slot].requests_sent_total);
break;
}
}
sfd = socks4_connect(fwd, dest_host, dest_port, csp);
break;
case SOCKS_5:
+ case SOCKS_5T:
sfd = socks5_connect(fwd, dest_host, dest_port, csp);
break;
default:
/* Should never get here */
log_error(LOG_LEVEL_FATAL,
- "SOCKS4 impossible internal error - bad SOCKS type.");
+ "Internal error in forwarded_connect(). Bad proxy type: %d", fwd->type);
}
if (JB_INVALID_SOCKET != sfd)
if (err)
{
log_error(LOG_LEVEL_CONNECT, "socks4_connect: %s", errstr);
- csp->error_message = strdup(errstr);
+ csp->error_message = strdup(errstr);
errno = EINVAL;
return(JB_INVALID_SOCKET);
}
c->vn = 4;
c->cd = 1;
- c->dstport[0] = (unsigned char)((target_port >> 8 ) & 0xff);
- c->dstport[1] = (unsigned char)((target_port ) & 0xff);
- c->dstip[0] = (unsigned char)((web_server_addr >> 24 ) & 0xff);
- c->dstip[1] = (unsigned char)((web_server_addr >> 16 ) & 0xff);
- c->dstip[2] = (unsigned char)((web_server_addr >> 8 ) & 0xff);
- c->dstip[3] = (unsigned char)((web_server_addr ) & 0xff);
+ c->dstport[0] = (unsigned char)((target_port >> 8 ) & 0xff);
+ c->dstport[1] = (unsigned char)((target_port ) & 0xff);
+ c->dstip[0] = (unsigned char)((web_server_addr >> 24) & 0xff);
+ c->dstip[1] = (unsigned char)((web_server_addr >> 16) & 0xff);
+ c->dstip[2] = (unsigned char)((web_server_addr >> 8) & 0xff);
+ c->dstip[3] = (unsigned char)((web_server_addr ) & 0xff);
/* pass the request to the socks server */
sfd = connect_to(fwd->gateway_host, fwd->gateway_port, csp);
if (sfd == JB_INVALID_SOCKET)
{
- /*
- * XXX: connect_to should fill in the exact reason.
- * Most likely resolving the IP of the forwarder failed.
- */
- errstr = "connect_to failed: see logfile for details";
- err = 1;
+ /* The error an its reason have already been logged by connect_to() */
+ return(JB_INVALID_SOCKET);
}
else if (write_socket(sfd, (char *)c, csiz))
{
err = 1;
close_socket(sfd);
}
+ else if (!data_is_available(sfd, csp->config->socket_timeout))
+ {
+ if (socket_is_still_alive(sfd))
+ {
+ errstr = "SOCKS4 negotiation timed out";
+ }
+ else
+ {
+ errstr = "SOCKS4 negotiation got aborted by the server";
+ }
+ log_error(LOG_LEVEL_CONNECT, "socks4_connect: %s", errstr);
+ err = 1;
+ close_socket(sfd);
+ }
else if (read_socket(sfd, buf, sizeof(buf)) != sizeof(*s))
{
errstr = "SOCKS4 negotiation read failed.";
if (err)
{
- csp->error_message = strdup(errstr);
+ csp->error_message = strdup(errstr);
return(JB_INVALID_SOCKET);
}
switch (s->cd)
{
- case SOCKS_REQUEST_GRANTED:
+ case SOCKS4_REQUEST_GRANTED:
return(sfd);
- case SOCKS_REQUEST_REJECT:
+ case SOCKS4_REQUEST_REJECT:
errstr = "SOCKS request rejected or failed.";
errno = EINVAL;
break;
- case SOCKS_REQUEST_IDENT_FAILED:
+ case SOCKS4_REQUEST_IDENT_FAILED:
errstr = "SOCKS request rejected because "
"SOCKS server cannot connect to identd on the client.";
errno = EACCES;
break;
- case SOCKS_REQUEST_IDENT_CONFLICT:
+ case SOCKS4_REQUEST_IDENT_CONFLICT:
errstr = "SOCKS request rejected because "
"the client program and identd report "
"different user-ids.";
{
int err = 0;
char cbuf[300];
- char sbuf[30];
+ char sbuf[10];
size_t client_pos = 0;
int server_size = 0;
size_t hostlen = 0;
err = 1;
}
- if (fwd->type != SOCKS_5)
+ if ((fwd->type != SOCKS_5) && (fwd->type != SOCKS_5T))
{
/* Should never get here */
log_error(LOG_LEVEL_FATAL,
{
errstr = "socks5 server unreachable";
log_error(LOG_LEVEL_CONNECT, "socks5_connect: %s", errstr);
+ /* Free the generic error message provided by connect_to() */
+ freez(csp->error_message);
csp->error_message = strdup(errstr);
return(JB_INVALID_SOCKET);
}
return(JB_INVALID_SOCKET);
}
- if (read_socket(sfd, sbuf, sizeof(sbuf)) != 2)
+ if (!data_is_available(sfd, csp->config->socket_timeout))
+ {
+ if (socket_is_still_alive(sfd))
+ {
+ errstr = "SOCKS5 negotiation timed out";
+ }
+ else
+ {
+ errstr = "SOCKS5 negotiation got aborted by the server";
+ }
+ err = 1;
+ }
+
+ if (!err && read_socket(sfd, sbuf, sizeof(sbuf)) != 2)
{
errstr = "SOCKS5 negotiation read failed";
err = 1;
if (write_socket(sfd, cbuf, client_pos))
{
- errstr = "SOCKS5 negotiation read failed";
+ errstr = "SOCKS5 negotiation write failed";
csp->error_message = strdup(errstr);
log_error(LOG_LEVEL_CONNECT, "%s", errstr);
close_socket(sfd);
return(JB_INVALID_SOCKET);
}
- server_size = read_socket(sfd, sbuf, sizeof(sbuf));
- if (server_size < 3)
- {
- errstr = "SOCKS5 negotiation read failed";
- err = 1;
- }
- else if (server_size > 20)
+ /*
+ * Optimistically send the HTTP request with the initial
+ * SOCKS request if the user enabled the use of Tor extensions,
+ * the CONNECT method isn't being used (in which case the client
+ * doesn't send data until it gets our 200 response) and the
+ * client request has actually been completely read already.
+ */
+ if ((fwd->type == SOCKS_5T) && (csp->http->ssl == 0)
+ && (csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
{
- /* This is somewhat unexpected but doesn't realy matter. */
- log_error(LOG_LEVEL_CONNECT, "socks5_connect: read %d bytes "
- "from socks server. Would have accepted up to %d.",
- server_size, sizeof(sbuf));
- }
+ char *client_headers = list_to_text(csp->headers);
+ size_t header_length;
- if (!err && (sbuf[0] != '\x05'))
- {
- errstr = "SOCKS5 negotiation protocol version error";
- err = 1;
+ if (client_headers == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory rebuilding client headers");
+ }
+ list_remove_all(csp->headers);
+ header_length= strlen(client_headers);
+
+ log_error(LOG_LEVEL_CONNECT,
+ "Optimistically sending %d bytes of client headers intended for %s",
+ header_length, csp->http->hostport);
+
+ if (write_socket(sfd, client_headers, header_length))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "optimistically writing header to: %s failed: %E", csp->http->hostport);
+ freez(client_headers);
+ return(JB_INVALID_SOCKET);
+ }
+ freez(client_headers);
+ if (csp->expected_client_content_length != 0)
+ {
+ unsigned long long buffered_request_bytes =
+ (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
+ log_error(LOG_LEVEL_CONNECT,
+ "Optimistically sending %d bytes of client body. Expected %d",
+ csp->expected_client_content_length, buffered_request_bytes);
+ assert(csp->expected_client_content_length == buffered_request_bytes);
+ if (write_socket(sfd, csp->client_iob->cur, buffered_request_bytes))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "optimistically writing %d bytes of client body to: %s failed: %E",
+ buffered_request_bytes, csp->http->hostport);
+ return(JB_INVALID_SOCKET);
+ }
+ clear_iob(csp->client_iob);
+ }
}
- if (!err && (sbuf[2] != '\x00'))
+ server_size = read_socket(sfd, sbuf, sizeof(sbuf));
+ if (server_size != sizeof(sbuf))
{
- errstr = "SOCKS5 negotiation protocol error";
- err = 1;
+ errstr = "SOCKS5 negotiation read failed";
}
-
- if (!err)
+ else
{
- if (sbuf[1] == SOCKS5_REQUEST_GRANTED)
+ if (sbuf[0] != '\x05')
+ {
+ errstr = "SOCKS5 negotiation protocol version error";
+ }
+ else if (sbuf[2] != '\x00')
+ {
+ errstr = "SOCKS5 negotiation protocol error";
+ }
+ else if (sbuf[1] != SOCKS5_REQUEST_GRANTED)
+ {
+ errstr = translate_socks5_error(sbuf[1]);
+ }
+ else
{
return(sfd);
}
- errstr = translate_socks5_error(sbuf[1]);
}
assert(errstr != NULL);
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