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- Fix dbclient with port 0 for server-allocated

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- Fix port forwards with a bind address of 127.0.0.1 vs "localhost" etc
This commit is contained in:
Matt Johnston 2014-02-18 21:33:56 +08:00
parent 29062e629f
commit 3e4433f715
1 changed files with 20 additions and 4 deletions
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24
cli-tcpfwd.c
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@ -161,9 +161,10 @@ void cli_recv_msg_request_success() {
if (!fwd->have_reply) {
fwd->have_reply = 1;
if (fwd->listenport == 0) {
/* The server should let us know which port was allocated if we requestd port 0 */
/* The server should let us know which port was allocated if we requested port 0 */
int allocport = buf_getint(ses.payload);
if (allocport > 0) {
fwd->listenport = allocport;
dropbear_log(LOG_INFO, "Allocated port %d for remote forward to %s:%d",
allocport, fwd->connectaddr, fwd->connectport);
}
@ -220,18 +221,33 @@ static int newtcpforwarded(struct Channel * channel) {
origaddr = buf_getstring(ses.payload, NULL);
origport = buf_getint(ses.payload);
/* Find which port corresponds */
/* Find which port corresponds. First try and match address as well as port,
in case they want to forward different ports separately ... */
for (iter = cli_opts.remotefwds->first; iter; iter = iter->next) {
fwd = (struct TCPFwdEntry*)iter->item;
if (origport == fwd->listenport
&& (strcmp(origaddr, fwd->listenaddr) == 0)) {
&& strcmp(origaddr, fwd->listenaddr) == 0) {
break;
}
}
if (!iter)
{
/* ... otherwise try to generically match the only forwarded port
without address (also handles ::1 vs 127.0.0.1 vs localhost case).
rfc4254 is vague about the definition of "address that was connected" */
for (iter = cli_opts.remotefwds->first; iter; iter = iter->next) {
fwd = (struct TCPFwdEntry*)iter->item;
if (origport == fwd->listenport) {
break;
}
}
}
if (iter == NULL) {
/* We didn't request forwarding on that port */
cleantext(origaddr);
cleantext(origaddr);
dropbear_log(LOG_INFO, "Server sent unrequested forward from \"%s:%d\"",
origaddr, origport);
goto out;