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-rw-r--r--channels.c71
1 files changed, 33 insertions, 38 deletions
diff --git a/channels.c b/channels.c
index 473c5efe..03f12d39 100644
--- a/channels.c
+++ b/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;
}
-/*
- * Initiate forwarding of connections to local port "port" through the secure
- * channel to host:port from remote side.
- */
-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)
+static int
+channel_setup_fwd_listener(int type, const char *listen_addr, u_short listen_port,
+ const char *host_to_connect, u_short port_to_connect, int gateway_ports)
{
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) {
- host = listen_address;
- type = SSH_CHANNEL_RPORT_LISTENER;
- } else {
- host = host_to_connect;
- type = SSH_CHANNEL_PORT_LISTENER;
+ if (host == NULL) {
+ error("No forward host name.");
+ return success;
}
-
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);