diff --git a/sys/gdb/netgdb.c b/sys/gdb/netgdb.c
--- a/sys/gdb/netgdb.c
+++ b/sys/gdb/netgdb.c
@@ -114,11 +114,8 @@
  * Receive non-TX ACK packets on the client port.
  *
  * The mbuf chain will have all framing headers removed (ethernet, inet, udp,
- * debugnet). If m_pullup is used, the supplied in-out mbuf pointer should be
- * updated appropriately.
- *
- * If the handler frees the mbuf chain, it should set the mbuf pointer
- * to NULL.  Otherwise, the debugnet input framework will free the
+ * debugnet). If the handler frees the mbuf chain, it should set the mbuf pointer
+ * to NULL. Otherwise, the debugnet input framework will free the
  * chain.
  */
 static int
@@ -376,7 +373,7 @@
 	gdb_return_to_ddb = true;
 	db_printf("(detaching GDB will return control to DDB)\n");
 
-	const in_addr_t *proxy_addr = debugnet_get_server(netgdb_conn);
+	const in_addr_t *proxy_addr = debugnet_get_server_addr(netgdb_conn);
 	const uint16_t proxy_port = debugnet_get_server_port(netgdb_conn) + 1;
 	inet_ntop(AF_INET, proxy_addr, proxy_buf, sizeof(proxy_buf));
 	if (inet_ntop(AF_INET, proxy_addr, proxy_buf, sizeof(proxy_buf)) == NULL) {
diff --git a/sys/net/debugnet.h b/sys/net/debugnet.h
--- a/sys/net/debugnet.h
+++ b/sys/net/debugnet.h
@@ -213,7 +213,7 @@
 /*
  * Get the connected server address.
  */
-const in_addr_t *debugnet_get_server(const struct debugnet_pcb *);
+const in_addr_t *debugnet_get_server_addr(const struct debugnet_pcb *);
 
 /*
  * Get the connected server port.
diff --git a/sys/net/debugnet.c b/sys/net/debugnet.c
--- a/sys/net/debugnet.c
+++ b/sys/net/debugnet.c
@@ -116,7 +116,7 @@
 }
 
 const in_addr_t *
-debugnet_get_server(const struct debugnet_pcb *pcb)
+debugnet_get_server_addr(const struct debugnet_pcb *pcb)
 {
 	MPASS(g_debugnet_pcb_inuse && pcb == &g_dnet_pcb &&
 	    pcb->dp_state >= DN_STATE_GOT_HERALD_PORT);
@@ -432,8 +432,8 @@
 	dnh = NULL;
 	error = pcb->dp_rx_handler(m);
 	if (error != 0) {
-		DNETDEBUG("RX handler was not able to accept message, "
-		    "skipping ack.\n");
+		DNETDEBUG("RX handler was not able to accept message, error %d. "
+		    "Skipping ack.\n", error);
 		return;
 	}