packet: Add more debugging

Signed-off-by: Aris Adamantiadis <aris@0xbadc0de.be>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

src/packet.c

@@ -165,7 +165,17 @@ int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user)
     if (session->session_state == SSH_SESSION_STATE_ERROR) {
         goto error;
     }
-
+#ifdef DEBUG_PACKET
+    SSH_LOG(SSH_LOG_PACKET,
+            "rcv packet cb (len=%zu, state=%s)",
+            receivedlen,
+            session->packet_state == PACKET_STATE_INIT ?
+                "INIT" :
+                session->packet_state == PACKET_STATE_SIZEREAD ?
+                    "SIZE_READ" :
+                    session->packet_state == PACKET_STATE_PROCESSING ?
+                    "PROCESSING" : "unknown");
+#endif
     switch(session->packet_state) {
         case PACKET_STATE_INIT:
             if (receivedlen < blocksize) {
@@ -173,6 +183,12 @@ int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user)
                  * We didn't receive enough data to read at least one
                  * block size, give up
                  */
+#ifdef DEBUG_PACKET
+                SSH_LOG(SSH_LOG_PACKET,
+                        "Waiting for more data (%zu < %zu)",
+                        receivedlen,
+                        blocksize);
+#endif
                 return 0;
             }