| #ifndef _TLV_H |
| #define _TLV_H |
| |
| #include <sys/types.h> |
| #include <string.h> |
| |
| #include <openbsc/msgb.h> |
| |
| #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 *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 *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_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_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; |
| 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, u_int8_t *buf, int buf_len); |
| |
| #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 */ |