diff options
| author | Vadim Yanitskiy <axilirator@gmail.com> | 2018-11-07 03:53:03 +0700 |
|---|---|---|
| committer | Vadim Yanitskiy <axilirator@gmail.com> | 2018-11-07 03:58:10 +0700 |
| commit | e521edefdaa69d1b78b3d4318e046bb8457123b0 (patch) | |
| tree | 4e6bab1f3185ff298597578fa5b81ea8c9b22497 | |
| parent | fa3b48227796e66d9dd05a53ff4b3062b2c19b46 (diff) | |
core/msgb.h: introduce msgb_l4len() helper
There is already a group of similar functions for L1, L2 and L3,
but L4 was missing. The L4 is usually used for parsing of complex
L3 messages, such as SS/USSD and SMS.
This change introduces a similar halper for L4.
Change-Id: I755f2d654bbdad2a8b4f94df9023bdd370b07ae6
| -rw-r--r-- | TODO-RELEASE | 1 | ||||
| -rw-r--r-- | include/osmocom/core/msgb.h | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/TODO-RELEASE b/TODO-RELEASE index 64833d23..5222ec96 100644 --- a/TODO-RELEASE +++ b/TODO-RELEASE @@ -10,3 +10,4 @@ libosmogsm gsm0480_l3hdr_push() removed from gsm/gsm0480.h (was not exposed) libosmogsm gsm48_push_l3hdr() (re)introduced in gsm/gsm48.h (GSM 04.08 API) libosmogsm gsm48_push_l3hdr_tid() a wrapper around gsm48_push_l3hdr() +libosmocore msgb_l4len new symbol (exposed as 'static inline' in msgb.h) diff --git a/include/osmocom/core/msgb.h b/include/osmocom/core/msgb.h index b1cb6ec7..8843db01 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 |