Hi,
ssh clients shows "closed by UNKNOWN" message when a socket is closed by a
remote side while ssh is waiting for user's password:
$ ssh user@localhost
user@localhost's password:
Connection closed by UNKNOWN
When the packet_read_seqnr() calls get_remote_ipaddr(), a connection's
socket is already closed and there's not been any other call of this function
yet so canonical_host_ip from canohost.c is still NULL and the function
returns "UNKNOWN". I think that it could be workarounded by calling get_remote_ipaddr() right
after packet_set_connection(), e.g. using another debug message, see bellow, or
there could be set_remote_ipaddr() in canonhost.c for that.
--- a/sshconnect.c
+++ b/sshconnect.c
@@ -62,6 +62,7 @@
#include "monitor_fdpass.h"
#include "ssh2.h"
#include "version.h"
+#include "canohost.h"
char *client_version_string = NULL;
char *server_version_string = NULL;
@@ -171,6 +172,8 @@ ssh_proxy_fdpass_connect(const char *host, u_short port,
/* Set the connection file descriptors. */
packet_set_connection(sock, sock);
+ debug("Connected to %.200s [%.100s] port %d.",
+ host, get_remote_ipaddr(), get_remote_port());
return 0;
}
@@ -493,6 +496,8 @@ ssh_connect_direct(const char *host, struct addrinfo *aitop
/* Set the connection. */
packet_set_connection(sock, sock);
+ debug("Connected to %.200s [%.100s] port %d.",
+ host, get_remote_ipaddr(), get_remote_port());
return 0;
}
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