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#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 */
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