X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=gateway.c;h=a8da953d5f357fbc6a868a63bc0faf0336e1050f;hp=b3dff39406151f2c937c1ac69a1f167dc45dcb87;hb=4aad1422119ebb4c3452ea1ae20de77cb46861ee;hpb=05dd2cc7b727e9600f3808d9156d94d1a3396155

diff --git a/gateway.c b/gateway.c
index b3dff394..a8da953d 100644
--- a/gateway.c
+++ b/gateway.c
@@ -1,4 +1,4 @@
-const char gateway_rcs[] = "$Id: gateway.c,v 1.64 2009/10/03 10:37:49 fabiankeil Exp $";
+const char gateway_rcs[] = "$Id: gateway.c,v 1.72 2011/03/27 14:00:36 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/gateway.c,v $
@@ -88,21 +88,24 @@ static jb_socket socks5_connect(const struct forward_spec *fwd,
                                 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 {
@@ -383,7 +386,9 @@ int connection_destination_matches(const struct reusable_connection *connection,
          && 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;
    }
 
@@ -392,7 +397,9 @@ int connection_destination_matches(const struct reusable_connection *connection,
          && 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;
    }
 
@@ -802,12 +809,22 @@ static jb_socket socks4_connect(const struct forward_spec * fwd,
 
    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";
+      /* The error an its reason have already been logged by connect_to()  */
+      return(JB_INVALID_SOCKET);
+   }
+   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 (write_socket(sfd, (char *)c, csiz))
    {
@@ -832,18 +849,18 @@ static jb_socket socks4_connect(const struct forward_spec * fwd,
 
    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.";
@@ -1004,7 +1021,20 @@ static jb_socket socks5_connect(const struct forward_spec *fwd,
       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;
@@ -1069,7 +1099,7 @@ static jb_socket socks5_connect(const struct forward_spec *fwd,
    }
    else if (server_size > 20)
    {
-      /* This is somewhat unexpected but doesn't realy matter. */
+      /* This is somewhat unexpected but doesn't really matter. */
       log_error(LOG_LEVEL_CONNECT, "socks5_connect: read %d bytes "
          "from socks server. Would have accepted up to %d.",
          server_size, sizeof(sbuf));