diff options
Diffstat (limited to 'include/osmocom/core/msgb.h')
| -rw-r--r-- | include/osmocom/core/msgb.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/osmocom/core/msgb.h b/include/osmocom/core/msgb.h index b1cb6ec7..2449151d 100644 --- a/include/osmocom/core/msgb.h +++ b/include/osmocom/core/msgb.h @@ -169,6 +169,18 @@ static inline unsigned int msgb_l3len(const struct msgb *msgb) return msgb->tail - (uint8_t *)msgb_l3(msgb); } +/*! determine length of L4 message + * \param[in] msgb message buffer + * \returns size of L4 message in bytes + * + * This function computes the number of bytes between the tail of the + * message and the layer 4 header. + */ +static inline unsigned int msgb_l4len(const struct msgb *msgb) +{ + return msgb->tail - (uint8_t *)msgb_sms(msgb); +} + /*! determine the length of the header * \param[in] msgb message buffer * \returns number of bytes between start of buffer and start of msg @@ -354,6 +366,15 @@ static inline void msgb_push_u32(struct msgb *msg, uint32_t word) osmo_store32be(word, space); } +static inline unsigned char *msgb_wrap_with_TL(struct msgb *msgb, uint8_t tag) +{ + uint8_t *data = msgb_push(msgb, 2); + + data[0] = tag; + data[1] = msgb->len - 2; + return data; +} + /*! remove (pull) a header from the front of the message buffer * \param[in] msgb message buffer * \param[in] len number of octets to be pulled |