diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index d49ab6c..e39ec0c 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -32,26 +32,26 @@
 #include <stdio.h>
 
 /* test messages for ipa */
-static u_int8_t ipa_id[] = {
+static uint8_t ipa_id[] = {
 	0x00, 0x01, 0xfe, 0x06,
 };
 
 /* SCCP messages are below */
-static u_int8_t gsm_reset[] = {
+static uint8_t gsm_reset[] = {
 	0x00, 0x12, 0xfd,
 	0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe,
 	0x02, 0x42, 0xfe, 0x06, 0x00, 0x04, 0x30, 0x04,
 	0x01, 0x20,
 };
 
-static const u_int8_t gsm_reset_ack[] = {
+static const uint8_t gsm_reset_ack[] = {
 	0x00, 0x13, 0xfd,
 	0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
 	0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x03,
 	0x00, 0x01, 0x31,
 };
 
-static const u_int8_t gsm_paging[] = {
+static const uint8_t gsm_paging[] = {
 	0x00, 0x20, 0xfd,
 	0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
 	0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x10,
@@ -60,7 +60,7 @@
 };
 
 /* BSC -> MSC connection open */
-static const u_int8_t bssmap_cr[] = {
+static const uint8_t bssmap_cr[] = {
 	0x00, 0x2c, 0xfd,
 	0x01, 0x01, 0x02, 0x03, 0x02, 0x02, 0x04, 0x02,
 	0x42, 0xfe, 0x0f, 0x1f, 0x00, 0x1d, 0x57, 0x05,
@@ -71,45 +71,45 @@
 };
 
 /* MSC -> BSC connection confirm */
-static const u_int8_t bssmap_cc[] = {
+static const uint8_t bssmap_cc[] = {
 	0x00, 0x0a, 0xfd,
 	0x02, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00,
 };
 
 /* MSC -> BSC released */
-static const u_int8_t bssmap_released[] = {
+static const uint8_t bssmap_released[] = {
 	0x00, 0x0e, 0xfd,
 	0x04, 0x00, 0x00, 0x03, 0x01, 0x02, 0x03, 0x00, 0x01, 0x0f,
 	0x02, 0x23, 0x42, 0x00,
 };
 
 /* BSC -> MSC released */
-static const u_int8_t bssmap_release_complete[] = {
+static const uint8_t bssmap_release_complete[] = {
 	0x00, 0x07, 0xfd,
 	0x05, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03
 };
 
 /* both directions IT timer */
-static const u_int8_t connnection_it[] = {
+static const uint8_t connnection_it[] = {
 	0x00, 0x0b, 0xfd,
 	0x10, 0x01, 0x02, 0x03, 0x01, 0x02, 0x03,
 	0x00, 0x00, 0x00, 0x00,
 };
 
 /* error in both directions */
-static const u_int8_t proto_error[] = {
+static const uint8_t proto_error[] = {
 	0x00, 0x05, 0xfd,
 	0x0f, 0x22, 0x33, 0x44, 0x00,
 };
 
 /* MGCP wrap... */
-static const u_int8_t mgcp_msg[] = {
+static const uint8_t mgcp_msg[] = {
 	0x00, 0x03, 0xfc,
 	0x20, 0x20, 0x20,
 };
 
 /* location updating request */
-static const u_int8_t bss_lu[] = {
+static const uint8_t bss_lu[] = {
 	0x00, 0x2e, 0xfd,
 	0x01, 0x91, 0x45, 0x14, 0x02, 0x02, 0x04, 0x02,
 	0x42, 0xfe, 0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05,
@@ -131,7 +131,7 @@
 };
 
 struct filter_result {
-	const u_int8_t *data;
+	const uint8_t *data;
 	const u_int16_t length;
 	const int dir;
 	const int result;
@@ -253,7 +253,7 @@
 
 #include "bsc_data.c"
 
-static void copy_to_msg(struct msgb *msg, const u_int8_t *data, unsigned int length)
+static void copy_to_msg(struct msgb *msg, const uint8_t *data, unsigned int length)
 {
 	msgb_reset(msg);
 	msg->l2h = msgb_put(msg, length);
@@ -567,7 +567,7 @@
 }
 
 struct cr_filter {
-	const u_int8_t *data;
+	const uint8_t *data;
 	int length;
 	int result;
 	int contype;