- tcpfwd bindaddr support against trunk. needs merging.

--HG--
extra : convert_revision : 658fd03abd21e0da7c4c89b9fff9dc693c72daae

1 files changed, 43 insertions, 23 deletions

diff --git a/cli-tcpfwd.c b/cli-tcpfwd.c
index 0242654..63eb70e 100644
--- a/cli-tcpfwd.c
+++ b/cli-tcpfwd.c
@@ -45,7 +45,9 @@ const struct ChanType cli_chan_tcpremote = {
 #endif
 
 #ifdef ENABLE_CLI_LOCALTCPFWD
-static int cli_localtcp(unsigned int listenport, const char* remoteaddr,
+static int cli_localtcp(const char* listenaddr, 
+		unsigned int listenport, 
+		const char* remoteaddr,
 		unsigned int remoteport);
 static const struct ChanType cli_chan_tcplocal = {
 	1, /* sepfds */
@@ -66,11 +68,14 @@ void setup_localtcp() {
 
 	for (iter = cli_opts.localfwds->first; iter; iter = iter->next) {
 		struct TCPFwdEntry * fwd = (struct TCPFwdEntry*)iter->item;
-		ret = cli_localtcp(fwd->listenport,
+		ret = cli_localtcp(
+				fwd->listenaddr,
+				fwd->listenport,
 				fwd->connectaddr,
 				fwd->connectport);
 		if (ret == DROPBEAR_FAILURE) {
-			dropbear_log(LOG_WARNING, "Failed local port forward %d:%s:%d",
+			dropbear_log(LOG_WARNING, "Failed local port forward %s:%d:%s:%d",
+					fwd->listenaddr,
 					fwd->listenport,
 					fwd->connectaddr,
 					fwd->connectport);
@@ -80,7 +85,9 @@ void setup_localtcp() {
 
 }
 
-static int cli_localtcp(unsigned int listenport, const char* remoteaddr,
+static int cli_localtcp(const char* listenaddr, 
+		unsigned int listenport, 
+		const char* remoteaddr,
 		unsigned int remoteport) {
 
 	struct TCPListener* tcpinfo = NULL;
@@ -94,10 +101,17 @@ static int cli_localtcp(unsigned int listenport, const char* remoteaddr,
 	tcpinfo->sendaddr = m_strdup(remoteaddr);
 	tcpinfo->sendport = remoteport;
 
-	if (opts.listen_fwd_all) {
-		tcpinfo->listenaddr = m_strdup("");
-	} else {
-		tcpinfo->listenaddr = m_strdup("localhost");
+	if (listenaddr)
+	{
+		tcpinfo->listenaddr = m_strdup(listenaddr);
+	}
+	else
+	{
+		if (opts.listen_fwd_all) {
+			tcpinfo->listenaddr = m_strdup("");
+		} else {
+			tcpinfo->listenaddr = m_strdup("localhost");
+		}
 	}
 	tcpinfo->listenport = listenport;
 
@@ -115,7 +129,7 @@ static int cli_localtcp(unsigned int listenport, const char* remoteaddr,
 #endif /* ENABLE_CLI_LOCALTCPFWD */
 
 #ifdef  ENABLE_CLI_REMOTETCPFWD
-static void send_msg_global_request_remotetcp(int port) {
+static void send_msg_global_request_remotetcp(const char *addr, int port) {
 
 	char* listenspec = NULL;
 	TRACE(("enter send_msg_global_request_remotetcp"))
@@ -124,13 +138,7 @@ static void send_msg_global_request_remotetcp(int port) {
 	buf_putbyte(ses.writepayload, SSH_MSG_GLOBAL_REQUEST);
 	buf_putstring(ses.writepayload, "tcpip-forward", 13);
 	buf_putbyte(ses.writepayload, 1); /* want_reply */
-	if (opts.listen_fwd_all) {
-		listenspec = "";
-	} else {
-		listenspec = "localhost";
-	}
-	/* TODO: IPv6? */;
-	buf_putstring(ses.writepayload, listenspec, strlen(listenspec));
+	buf_putstring(ses.writepayload, addr, strlen(addr));
 	buf_putint(ses.writepayload, port);
 
 	encrypt_packet();
@@ -173,7 +181,17 @@ void setup_remotetcp() {
 
 	for (iter = cli_opts.remotefwds->first; iter; iter = iter->next) {
 		struct TCPFwdEntry *fwd = (struct TCPFwdEntry*)iter->item;
-		send_msg_global_request_remotetcp(fwd->listenport);
+		if (!fwd->listenaddr)
+		{
+			// we store the addresses so that we can compare them
+			// when the server sends them back
+			if (opts.listen_fwd_all) {
+				fwd->listenaddr = m_strdup("");
+			} else {
+				fwd->listenaddr = m_strdup("localhost");
+			}
+		}
+		send_msg_global_request_remotetcp(fwd->listenaddr, fwd->listenport);
 	}
 
 	TRACE(("leave setup_remotetcp"))
@@ -181,6 +199,7 @@ void setup_remotetcp() {
 
 static int newtcpforwarded(struct Channel * channel) {
 
+    char *origaddr = NULL;
 	unsigned int origport;
 	m_list_elem * iter = NULL;
 	struct TCPFwdEntry *fwd;
@@ -188,23 +207,23 @@ static int newtcpforwarded(struct Channel * channel) {
 	int sock;
 	int err = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED;
 
-	/* We don't care what address they connected to */
-	buf_eatstring(ses.payload);
-
+	origaddr = buf_getstring(ses.payload, NULL);
 	origport = buf_getint(ses.payload);
 
 	/* Find which port corresponds */
 	for (iter = cli_opts.remotefwds->first; iter; iter = iter->next) {
 		fwd = (struct TCPFwdEntry*)iter->item;
-		if (origport == fwd->listenport) {
+		if (origport == fwd->listenport
+				&& (strcmp(origaddr, fwd->listenaddr) == 0)) {
 			break;
 		}
 	}
 
 	if (iter == NULL) {
 		/* We didn't request forwarding on that port */
-		dropbear_log(LOG_INFO, "Server send unrequested port, from port %d", 
-										origport);
+        cleantext(origaddr);
+		dropbear_log(LOG_INFO, "Server sent unrequested forward from \"%s:%d\"", 
+                origaddr, origport);
 		goto out;
 	}
 	
@@ -226,6 +245,7 @@ static int newtcpforwarded(struct Channel * channel) {
 	err = SSH_OPEN_IN_PROGRESS;
 
 out:
+	m_free(origaddr);
 	TRACE(("leave newtcpdirect: err %d", err))
 	return err;
 }