- jakob@cvs.openbsd.org 2002/03/21 15:17:26
[clientloop.c ssh.1]
add built-in command line for adding new port forwardings on the fly.
based on a patch from brian wellington. ok markus@.
diff --git a/clientloop.c b/clientloop.c
index 65a6682..7259959 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -59,7 +59,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: clientloop.c,v 1.96 2002/02/06 14:55:15 markus Exp $");
+RCSID("$OpenBSD: clientloop.c,v 1.97 2002/03/21 15:17:26 jakob Exp $");
#include "ssh.h"
#include "ssh1.h"
@@ -81,6 +81,7 @@
#include "atomicio.h"
#include "sshtty.h"
#include "misc.h"
+#include "readpass.h"
/* import options */
extern Options options;
@@ -470,6 +471,75 @@
}
}
+static void
+process_cmdline(Buffer *bin, Buffer *bout, Buffer *berr)
+{
+ char string[1024];
+ void (*handler)(int);
+ char *s, *cmd;
+ u_short fwd_port, fwd_host_port;
+ char buf[1024], sfwd_port[6], sfwd_host_port[6];
+ int local = 0;
+ int n;
+
+ leave_raw_mode();
+ handler = signal(SIGINT, SIG_IGN);
+ s = read_passphrase("\r\nssh> ", RP_ECHO);
+ if (s == NULL)
+ goto out;
+ cmd = s;
+
+ while (*s && isspace(*s))
+ s++;
+
+ if (*s == 0)
+ goto out;
+
+ if (strlen(s) < 2 || s[0] != '-' || !(s[1] == 'L' || s[1] == 'R')) {
+ log("Invalid command");
+ goto out;
+ }
+ if (s[1] == 'L')
+ local = 1;
+ if (!local && !compat20) {
+ log("Not supported for SSH protocol version 1");
+ goto out;
+ }
+
+ s += 2;
+ while (*s && isspace(*s))
+ s++;
+
+ if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]",
+ sfwd_port, buf, sfwd_host_port) != 3 &&
+ sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]",
+ sfwd_port, buf, sfwd_host_port) != 3) {
+ log("Bad forwarding specification");
+ goto out;
+ }
+ if ((fwd_port = a2port(sfwd_port)) == 0 ||
+ (fwd_host_port = a2port(sfwd_host_port)) == 0) {
+ log("Bad forwarding port(s)");
+ goto out;
+ }
+ if (local) {
+ n = channel_setup_local_fwd_listener(fwd_port, buf,
+ fwd_host_port, options.gateway_ports);
+ if (n <= 0) {
+ log("Port forwarding failed");
+ goto out;
+ }
+ } else
+ channel_request_remote_forwarding(fwd_port, buf,
+ fwd_host_port);
+ log("Forwarding port");
+out:
+ signal(SIGINT, handler);
+ enter_raw_mode();
+ if (cmd)
+ xfree(cmd);
+}
+
/* process the characters one by one */
static int
process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
@@ -574,6 +644,7 @@
"%c?\r\n\
Supported escape sequences:\r\n\
~. - terminate connection\r\n\
+~C - open a command line\r\n\
~R - Request rekey (SSH protocol 2 only)\r\n\
~^Z - suspend ssh\r\n\
~# - list forwarded connections\r\n\
@@ -593,6 +664,10 @@
xfree(s);
continue;
+ case 'C':
+ process_cmdline(bin, bout, berr);
+ continue;
+
default:
if (ch != escape_char) {
buffer_put_char(bin, escape_char);