ipaccess_sign_link_reject: fix: use osmo_strlcpy() to safely copy IP

Fixes: coverity scan CID#189459
Change-Id: Ib9c5e374b9c5c8f79eecf95c439a25b0f438e4e5
diff --git a/src/osmo-bsc/bts_ipaccess_nanobts.c b/src/osmo-bsc/bts_ipaccess_nanobts.c
index 40cabb8..1fffd89 100644
--- a/src/osmo-bsc/bts_ipaccess_nanobts.c
+++ b/src/osmo-bsc/bts_ipaccess_nanobts.c
@@ -32,6 +32,7 @@
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/socket.h>
 #include <osmocom/core/talloc.h>
+#include <osmocom/core/utils.h>
 #include <osmocom/bsc/gsm_data.h>
 #include <osmocom/bsc/abis_nm.h>
 #include <osmocom/bsc/abis_rsl.h>
@@ -494,7 +495,7 @@
 			return;
 		entry->site_id = site_id;
 		entry->bts_id = bts_id;
-		strncpy(entry->ip, ip, sizeof(entry->ip));
+		osmo_strlcpy(entry->ip, ip, sizeof(entry->ip));
 	}
 
 	/* Add to beginning with current timestamp */