diff options
Diffstat (limited to 'include/osmocom/gsm/tlv.h')
| -rw-r--r-- | include/osmocom/gsm/tlv.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/osmocom/gsm/tlv.h b/include/osmocom/gsm/tlv.h index bb0e8fc9..254c21bc 100644 --- a/include/osmocom/gsm/tlv.h +++ b/include/osmocom/gsm/tlv.h @@ -111,6 +111,14 @@ static inline uint8_t *tlv_put(uint8_t *buf, uint8_t tag, uint8_t len, return buf + len; } +/*! put (append) a TL field (a TLV field but omitting the value part). */ +static inline uint8_t *tl_put(uint8_t *buf, uint8_t tag, uint8_t len) +{ + *buf++ = tag; + *buf++ = len; + return buf; +} + /*! put (append) a TLV16 field */ static inline uint8_t *tlv16_put(uint8_t *buf, uint8_t tag, uint8_t len, const uint16_t *val) @@ -132,6 +140,15 @@ static inline uint8_t *tl16v_put(uint8_t *buf, uint8_t tag, uint16_t len, return buf + len*2; } +/*! put (append) a TL16 field. */ +static inline uint8_t *tl16_put(uint8_t *buf, uint8_t tag, uint16_t len) +{ + *buf++ = tag; + *buf++ = len >> 8; + *buf++ = len & 0xff; + return buf; +} + /*! put (append) a TL16V field */ static inline uint8_t *t16lv_put(uint8_t *buf, uint16_t tag, uint8_t len, const uint8_t *val) @@ -158,6 +175,23 @@ static inline uint8_t *tvlv_put(uint8_t *buf, uint8_t tag, uint16_t len, return ret; } +/*! put (append) a TvL field (a TvLV with variable-size length, where the value part's length is already known, but will + * be put() later). + * \returns pointer to the value's start position. + */ +static inline uint8_t *tvl_put(uint8_t *buf, uint8_t tag, uint16_t len) +{ + uint8_t *ret; + + if (len <= TVLV_MAX_ONEBYTE) { + ret = tl_put(buf, tag, len); + buf[1] |= 0x80; + } else + ret = tl16_put(buf, tag, len); + + return ret; +} + /*! put (append) a variable-length tag or variable-length length * */ static inline uint8_t *vt_gan_put(uint8_t *buf, uint16_t tag) { @@ -215,6 +249,17 @@ static inline uint8_t *msgb_t16lv_put(struct msgb *msg, uint16_t tag, uint8_t le return t16lv_put(buf, tag, len, val); } +/*! put (append) a TvL field to \ref msgb, i.e. a TvLV with variable-size length, where the value's length is already + * known, but will be put() later. The value section is not yet reserved, only tag and variable-length are put in the + * msgb. + * \returns pointer to the value's start position and end of the msgb. + */ +static inline uint8_t *msgb_tvl_put(struct msgb *msg, uint8_t tag, uint16_t len) +{ + uint8_t *buf = msgb_put(msg, TVLV_GROSS_LEN(len)); + return tvl_put(buf, tag, len); +} + /*! put (append) a TvLV field to \ref msgb */ static inline uint8_t *msgb_tvlv_put(struct msgb *msg, uint8_t tag, uint16_t len, const uint8_t *val) |