gsm_04_80: Use msgb_push to get the verification code of msgb
msgb started to verify that we do have enough tail/headroom
and this code was not using this check.
diff --git a/openbsc/src/gsm_04_80.c b/openbsc/src/gsm_04_80.c
index 757653a..462d978 100644
--- a/openbsc/src/gsm_04_80.c
+++ b/openbsc/src/gsm_04_80.c
@@ -51,22 +51,22 @@
static inline unsigned char *msgb_wrap_with_TL(struct msgb *msgb, u_int8_t tag)
{
- msgb->data -= 2;
- msgb->data[0] = tag;
- msgb->data[1] = msgb->len;
- msgb->len += 2;
- return msgb->data;
+ uint8_t *data = msgb_push(msgb, 2);
+
+ data[0] = tag;
+ data[1] = msgb->len;
+ return data;
}
static inline unsigned char *msgb_push_TLV1(struct msgb *msgb, u_int8_t tag,
u_int8_t value)
{
- msgb->data -= 3;
- msgb->len += 3;
- msgb->data[0] = tag;
- msgb->data[1] = 1;
- msgb->data[2] = value;
- return msgb->data;
+ uint8_t *data = msgb_push(msgb, 3);
+
+ data[0] = tag;
+ data[1] = 1;
+ data[2] = value;
+ return data;
}