diff options
Diffstat (limited to 'src/shared/libosmocore/include/osmocom/gsm/tlv.h')
| -rw-r--r-- | src/shared/libosmocore/include/osmocom/gsm/tlv.h | 100 |
1 files changed, 98 insertions, 2 deletions
diff --git a/src/shared/libosmocore/include/osmocom/gsm/tlv.h b/src/shared/libosmocore/include/osmocom/gsm/tlv.h index d2936d6d..9c0319d9 100644 --- a/src/shared/libosmocore/include/osmocom/gsm/tlv.h +++ b/src/shared/libosmocore/include/osmocom/gsm/tlv.h @@ -20,6 +20,7 @@ TL16V 8 16 N * 8 TLV16 8 8 N * 16 TvLV 8 8/16 N * 8 + vTvLV 8/16 8/16 N * 8 */ @@ -46,6 +47,36 @@ static inline uint16_t TVLV_GROSS_LEN(uint16_t len) return TL16V_GROSS_LEN(len); } +/*! \brief gross length of vTvL header (tag+len) */ +static inline uint16_t VTVL_GAN_GROSS_LEN(uint16_t tag, uint16_t len) +{ + uint16_t ret = 2; + + if (tag > TVLV_MAX_ONEBYTE) + ret++; + + if (len > TVLV_MAX_ONEBYTE) + ret++; + + return ret; +} + +/*! \brief gross length of vTvLV (tag+len+val) */ +static inline uint16_t VTVLV_GAN_GROSS_LEN(uint16_t tag, uint16_t len) +{ + uint16_t ret; + + if (len <= TVLV_MAX_ONEBYTE) + return TLV_GROSS_LEN(len); + else + return TL16V_GROSS_LEN(len); + + if (tag > TVLV_MAX_ONEBYTE) + ret += 1; + + return ret; +} + /* TLV generation */ /*! \brief put (append) a LV field */ @@ -103,6 +134,42 @@ static inline uint8_t *tvlv_put(uint8_t *buf, uint8_t tag, uint16_t len, return ret; } +/*! \brief put (append) a variable-length tag or variable-length length * */ +static inline uint8_t *vt_gan_put(uint8_t *buf, uint16_t tag) +{ + if (tag > TVLV_MAX_ONEBYTE) { + /* two-byte TAG */ + *buf++ = 0x80 | (tag >> 8); + *buf++ = (tag & 0xff); + } else + *buf++ = tag; + + return buf; +} + +/* \brief put (append) vTvL (GAN) field (tag + length)*/ +static inline uint8_t *vtvl_gan_put(uint8_t *buf, uint16_t tag, uint16_t len) +{ + uint8_t *ret; + + ret = vt_gan_put(buf, tag); + return vt_gan_put(ret, len); +} + +/* \brief put (append) vTvLV (GAN) field (tag + length + val) */ +static inline uint8_t *vtvlv_gan_put(uint8_t *buf, uint16_t tag, uint16_t len, + const uint8_t *val) +{ + uint8_t *ret; + + ret = vtvl_gan_put(buf, tag, len ); + + memcpy(ret, val, len); + ret = buf + len; + + return ret; +} + /*! \brief put (append) a TLV16 field to \ref msgb */ static inline uint8_t *msgb_tlv16_put(struct msgb *msg, uint8_t tag, uint8_t len, const uint16_t *val) { @@ -126,6 +193,14 @@ static inline uint8_t *msgb_tvlv_put(struct msgb *msg, uint8_t tag, uint16_t len return tvlv_put(buf, tag, len, val); } +/*! \brief put (append) a vTvLV field to \ref msgb */ +static inline uint8_t *msgb_vtvlv_gan_put(struct msgb *msg, uint16_t tag, + uint16_t len, const uint8_t *val) +{ + uint8_t *buf = msgb_put(msg, VTVLV_GAN_GROSS_LEN(tag, len)); + return vtvlv_gan_put(buf, tag, len, val); +} + /*! \brief put (append) a L16TV field to \ref msgb */ static inline uint8_t *msgb_l16tv_put(struct msgb *msg, uint16_t len, uint8_t tag, const uint8_t *val) @@ -264,6 +339,25 @@ static inline uint8_t *msgb_tvlv_push(struct msgb *msg, uint8_t tag, uint16_t le return buf; } +/* \brief push (prepend) a vTvL header to a \ref msgb + */ +static inline uint8_t *msgb_vtvl_gan_push(struct msgb *msg, uint16_t tag, + uint16_t len) +{ + uint8_t *buf = msgb_push(msg, VTVL_GAN_GROSS_LEN(tag, len)); + vtvl_gan_put(buf, tag, len); + return buf; +} + + +static inline uint8_t *msgb_vtvlv_gan_push(struct msgb *msg, uint16_t tag, + uint16_t len, const uint8_t *val) +{ + uint8_t *buf = msgb_push(msg, VTVLV_GAN_GROSS_LEN(tag, len)); + vtvlv_gan_put(buf, tag, len, val); + return buf; +} + /* TLV parsing */ /*! \brief Entry in a TLV parser array */ @@ -281,7 +375,8 @@ enum tlv_type { TLV_TYPE_TLV, /*!< \brief tag-length-value */ TLV_TYPE_TL16V, /*!< \brief tag, 16 bit length, value */ TLV_TYPE_TvLV, /*!< \brief tag, variable length, value */ - TLV_TYPE_SINGLE_TV /*!< \brief tag and value (both 4 bit) in 1 byte */ + TLV_TYPE_SINGLE_TV, /*!< \brief tag and value (both 4 bit) in 1 byte */ + TLV_TYPE_vTvLV_GAN, /*!< \brief variable-length tag, variable-length length */ }; /*! \brief Definition of a single IE (Information Element) */ @@ -301,6 +396,7 @@ struct tlv_parsed { }; extern struct tlv_definition tvlv_att_def; +extern struct tlv_definition vtvlv_gan_att_def; int tlv_parse_one(uint8_t *o_tag, uint16_t *o_len, const uint8_t **o_val, const struct tlv_definition *def, @@ -314,6 +410,6 @@ void tlv_def_patch(struct tlv_definition *dst, const struct tlv_definition *src) #define TLVP_LEN(x, y) (x)->lv[y].len #define TLVP_VAL(x, y) (x)->lv[y].val -/*! }@ */ +/*! @} */ #endif /* _TLV_H */ |