- markus@cvs.openbsd.org 2002/01/16 13:17:51

[channels.c channels.h serverloop.c ssh.c]
     wrapper for channel_setup_fwd_listener

ChangeLog

@@ -182,6 +182,9 @@
    - markus@cvs.openbsd.org 2002/01/14 13:57:03
      [channels.h nchan.c]
      (c) 2002
+   - markus@cvs.openbsd.org 2002/01/16 13:17:51
+     [channels.c channels.h serverloop.c ssh.c]
+     wrapper for channel_setup_fwd_listener
 
 20020121
  - (djm) Rework ssh-rand-helper:
@@ -7329,4 +7332,4 @@
  - Wrote replacements for strlcpy and mkdtemp
  - Released 1.0pre1
 
-$Id: ChangeLog,v 1.1774 2002/01/22 12:29:03 djm Exp $
+$Id: ChangeLog,v 1.1775 2002/01/22 12:29:22 djm Exp $

channels.c

@@ -39,7 +39,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: channels.c,v 1.159 2002/01/14 13:55:55 markus Exp $");
+RCSID("$OpenBSD: channels.c,v 1.160 2002/01/16 13:17:51 markus Exp $");
 
 #include "ssh.h"
 #include "ssh1.h"
@@ -2037,53 +2037,30 @@ channel_set_af(int af)
 	IPv4or6 = af;
 }
 
-/*
+static int
- * Initiate forwarding of connections to local port "port" through the secure
+channel_setup_fwd_listener(int type, const char *listen_addr, u_short listen_port,
- * channel to host:port from remote side.
+    const char *host_to_connect, u_short port_to_connect, int gateway_ports)
- */
-int
-channel_request_local_forwarding(u_short listen_port, const char *host_to_connect,
-    u_short port_to_connect, int gateway_ports)
-{
-	return channel_request_forwarding(
-	    NULL, listen_port,
-	    host_to_connect, port_to_connect,
-	    gateway_ports, /*remote_fwd*/ 0);
-}
-
-/*
- * If 'remote_fwd' is true we have a '-R style' listener for protocol 2
- * (SSH_CHANNEL_RPORT_LISTENER).
- */
-int
-channel_request_forwarding(
-    const char *listen_address, u_short listen_port,
-    const char *host_to_connect, u_short port_to_connect,
-    int gateway_ports, int remote_fwd)
 {
 	Channel *c;
-	int success, sock, on = 1, type;
+	int success, sock, on = 1;
 	struct addrinfo hints, *ai, *aitop;
-	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
 	const char *host;
+	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
 	struct linger linger;
 
 	success = 0;
+	host = (type == SSH_CHANNEL_RPORT_LISTENER) ?
+	    listen_addr : host_to_connect;
 
-	if (remote_fwd) {
+	if (host == NULL) {
-		host = listen_address;
+		error("No forward host name.");
-		type = SSH_CHANNEL_RPORT_LISTENER;
+		return success;
-	} else {
-		host = host_to_connect;
-		type = SSH_CHANNEL_PORT_LISTENER;
 	}
-
 	if (strlen(host) > SSH_CHANNEL_PATH_LEN - 1) {
 		error("Forward host name too long.");
 		return success;
 	}
 
-	/* XXX listen_address is currently ignored */
 	/*
 	 * getaddrinfo returns a loopback address if the hostname is
 	 * set to NULL and hints.ai_flags is not AI_PASSIVE
@@ -2101,7 +2078,7 @@ channel_request_forwarding(
 			continue;
 		if (getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop, sizeof(ntop),
 		    strport, sizeof(strport), NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
-			error("channel_request_forwarding: getnameinfo failed");
+			error("channel_setup_fwd_listener: getnameinfo failed");
 			continue;
 		}
 		/* Create a port to listen for the host. */
@@ -2143,7 +2120,7 @@ channel_request_forwarding(
 		    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
 		    0, xstrdup("port listener"), 1);
 		if (c == NULL) {
-			error("channel_request_forwarding: channel_new failed");
+			error("channel_setup_fwd_listener: channel_new failed");
 			close(sock);
 			continue;
 		}
@@ -2153,12 +2130,30 @@ channel_request_forwarding(
 		success = 1;
 	}
 	if (success == 0)
-		error("channel_request_forwarding: cannot listen to port: %d",
+		error("channel_setup_fwd_listener: cannot listen to port: %d",
 		    listen_port);
 	freeaddrinfo(aitop);
 	return success;
 }
 
+/* protocol local port fwd, used by ssh (and sshd in v1) */
+int
+channel_setup_local_fwd_listener(u_short listen_port,
+    const char *host_to_connect, u_short port_to_connect, int gateway_ports)
+{
+	return channel_setup_fwd_listener(SSH_CHANNEL_PORT_LISTENER,
+	    NULL, listen_port, host_to_connect, port_to_connect, gateway_ports);
+}
+
+/* protocol v2 remote port fwd, used by sshd */
+int
+channel_setup_remote_fwd_listener(const char *listen_address,
+    u_short listen_port, int gateway_ports)
+{
+	return channel_setup_fwd_listener(SSH_CHANNEL_RPORT_LISTENER,
+	    listen_address, listen_port, NULL, 0, gateway_ports);
+}
+
 /*
  * Initiate forwarding of connections to port "port" on remote host through
  * the secure channel to host:port from local side.
@@ -2244,7 +2239,7 @@ channel_input_port_forward_request(int is_root, int gateway_ports)
 				  port);
 #endif
 	/* Initiate forwarding */
-	channel_request_local_forwarding(port, hostname, host_port, gateway_ports);
+	channel_setup_local_fwd_listener(port, hostname, host_port, gateway_ports);
 
 	/* Free the argument string. */
 	xfree(hostname);

channels.h

@@ -32,7 +32,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-/* RCSID("$OpenBSD: channels.h,v 1.59 2002/01/14 13:57:03 markus Exp $"); */
+/* RCSID("$OpenBSD: channels.h,v 1.60 2002/01/16 13:17:51 markus Exp $"); */
 
 #ifndef CHANNEL_H
 #define CHANNEL_H
@@ -190,10 +190,8 @@ void     channel_input_port_forward_request(int, int);
 int	 channel_connect_to(const char *, u_short);
 int	 channel_connect_by_listen_address(u_short);
 void	 channel_request_remote_forwarding(u_short, const char *, u_short);
-int	 channel_request_local_forwarding(u_short, const char *, u_short, int);
+int	 channel_setup_local_fwd_listener(u_short, const char *, u_short, int);
-int
+int	 channel_setup_remote_fwd_listener(const char *, u_short, int);
-channel_request_forwarding(const char *, u_short, const char *, u_short, int,
-    int);
 
 /* x11 forwarding */
 

serverloop.c

@@ -35,7 +35,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: serverloop.c,v 1.94 2002/01/10 11:13:29 markus Exp $");
+RCSID("$OpenBSD: serverloop.c,v 1.95 2002/01/16 13:17:51 markus Exp $");
 
 #include "xmalloc.h"
 #include "packet.h"
@@ -991,11 +991,8 @@ server_input_global_request(int type, u_int32_t seq, void *ctxt)
 			packet_send_debug("Server has disabled port forwarding.");
 		} else {
 			/* Start listening on the port */
-			success = channel_request_forwarding(
+			success = channel_setup_remote_fwd_listener(
-			    listen_address, listen_port,
+			    listen_address, listen_port, options.gateway_ports);
-			    /*unspec host_to_connect*/ "<unspec host>",
-			    /*unspec port_to_connect*/ 0,
-			    options.gateway_ports, /*remote*/ 1);
 		}
 		xfree(listen_address);
 	}

ssh.c

@@ -39,7 +39,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: ssh.c,v 1.157 2001/12/28 15:06:00 markus Exp $");
+RCSID("$OpenBSD: ssh.c,v 1.158 2002/01/16 13:17:51 markus Exp $");
 
 #include <openssl/evp.h>
 #include <openssl/err.h>
@@ -841,7 +841,7 @@ ssh_init_forwarding(void)
 		    options.local_forwards[i].port,
 		    options.local_forwards[i].host,
 		    options.local_forwards[i].host_port);
-		success += channel_request_local_forwarding(
+		success += channel_setup_local_fwd_listener(
 		    options.local_forwards[i].port,
 		    options.local_forwards[i].host,
 		    options.local_forwards[i].host_port,