diff options
Diffstat (limited to 'openbsc/include/openbsc/tlv.h')
| -rw-r--r-- | openbsc/include/openbsc/tlv.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/openbsc/include/openbsc/tlv.h b/openbsc/include/openbsc/tlv.h new file mode 100644 index 000000000..ae88e6ed3 --- /dev/null +++ b/openbsc/include/openbsc/tlv.h @@ -0,0 +1,171 @@ +#ifndef _TLV_H +#define _TLV_H + +#include <sys/types.h> +#include <string.h> + +#include <openbsc/msgb.h> + +#define LV_GROSS_LEN(x) (x+1) +#define TLV_GROSS_LEN(x) (x+2) +#define TLV16_GROSS_LEN(x) ((2*x)+2) +#define TL16V_GROSS_LEN(x) (x+3) + +/* TLV generation */ + +static inline u_int8_t *lv_put(u_int8_t *buf, u_int8_t len, + const u_int8_t *val) +{ + *buf++ = len; + memcpy(buf, val, len); + return buf + len; +} + +static inline u_int8_t *tlv_put(u_int8_t *buf, u_int8_t tag, u_int8_t len, + const u_int8_t *val) +{ + *buf++ = tag; + *buf++ = len; + memcpy(buf, val, len); + return buf + len; +} + +static inline u_int8_t *tlv16_put(u_int8_t *buf, u_int8_t tag, u_int8_t len, + const u_int16_t *val) +{ + *buf++ = tag; + *buf++ = len; + memcpy(buf, val, len*2); + return buf + len*2; +} + +static inline u_int8_t *tl16v_put(u_int8_t *buf, u_int8_t tag, u_int16_t len, + const u_int8_t *val) +{ + *buf++ = tag; + *buf++ = len >> 8; + *buf++ = len & 0xff; + memcpy(buf, val, len); + return buf + len*2; +} + +static inline u_int8_t *msgb_tlv16_put(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int16_t *val) +{ + u_int8_t *buf = msgb_put(msg, TLV16_GROSS_LEN(len)); + return tlv16_put(buf, tag, len, val); +} + +static inline u_int8_t *msgb_tl16v_put(struct msgb *msg, u_int8_t tag, u_int16_t len, + const u_int8_t *val) +{ + u_int8_t *buf = msgb_put(msg, TL16V_GROSS_LEN(len)); + return tl16v_put(buf, tag, len, val); +} + +static inline u_int8_t *v_put(u_int8_t *buf, u_int8_t val) +{ + *buf++ = val; + return buf; +} + +static inline u_int8_t *tv_put(u_int8_t *buf, u_int8_t tag, + u_int8_t val) +{ + *buf++ = tag; + *buf++ = val; + return buf; +} + +static inline u_int8_t *tv16_put(u_int8_t *buf, u_int8_t tag, + u_int16_t val) +{ + *buf++ = tag; + *buf++ = val >> 8; + *buf++ = val & 0xff; + return buf; +} + +static inline u_int8_t *msgb_lv_put(struct msgb *msg, u_int8_t len, const u_int8_t *val) +{ + u_int8_t *buf = msgb_put(msg, LV_GROSS_LEN(len)); + return lv_put(buf, len, val); +} + +static inline u_int8_t *msgb_tlv_put(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int8_t *val) +{ + u_int8_t *buf = msgb_put(msg, TLV_GROSS_LEN(len)); + return tlv_put(buf, tag, len, val); +} + +static inline u_int8_t *msgb_tv_put(struct msgb *msg, u_int8_t tag, u_int8_t val) +{ + u_int8_t *buf = msgb_put(msg, 2); + return tv_put(buf, tag, val); +} + +static inline u_int8_t *msgb_v_put(struct msgb *msg, u_int8_t val) +{ + u_int8_t *buf = msgb_put(msg, 1); + return v_put(buf, val); +} + +static inline u_int8_t *msgb_tv16_put(struct msgb *msg, u_int8_t tag, u_int16_t val) +{ + u_int8_t *buf = msgb_put(msg, 3); + return tv16_put(buf, tag, val); +} + +static inline u_int8_t *msgb_tlv_push(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int8_t *val) +{ + u_int8_t *buf = msgb_push(msg, TLV_GROSS_LEN(len)); + return tlv_put(buf, tag, len, val); +} + +static inline u_int8_t *msgb_tv_push(struct msgb *msg, u_int8_t tag, u_int8_t val) +{ + u_int8_t *buf = msgb_push(msg, 2); + return tv_put(buf, tag, val); +} + +static inline u_int8_t *msgb_tv16_push(struct msgb *msg, u_int8_t tag, u_int16_t val) +{ + u_int8_t *buf = msgb_push(msg, 3); + return tv16_put(buf, tag, val); +} + +/* TLV parsing */ + +struct tlv_p_entry { + u_int16_t len; + const u_int8_t *val; +}; + +enum tlv_type { + TLV_TYPE_FIXED, + TLV_TYPE_T, + TLV_TYPE_TV, + TLV_TYPE_TLV, + TLV_TYPE_TL16V, +}; + +struct tlv_def { + enum tlv_type type; + u_int8_t fixed_len; +}; + +struct tlv_definition { + struct tlv_def def[0xff]; +}; + +struct tlv_parsed { + struct tlv_p_entry lv[0xff]; +}; + +int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def, + const u_int8_t *buf, int buf_len, u_int8_t lv_tag, u_int8_t lv_tag2); + +#define TLVP_PRESENT(x, y) ((x)->lv[y].val) +#define TLVP_LEN(x, y) (x)->lv[y].len +#define TLVP_VAL(x, y) (x)->lv[y].val + +#endif /* _TLV_H */ |