172 lines
3.7 KiB
C
172 lines
3.7 KiB
C
#ifndef _TLV_H
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#define _TLV_H
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#include <sys/types.h>
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#include <string.h>
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#include <openbsc/msgb.h>
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#define LV_GROSS_LEN(x) (x+1)
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#define TLV_GROSS_LEN(x) (x+2)
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#define TLV16_GROSS_LEN(x) ((2*x)+2)
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#define TL16V_GROSS_LEN(x) (x+3)
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/* TLV generation */
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static inline u_int8_t *lv_put(u_int8_t *buf, u_int8_t len,
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const u_int8_t *val)
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{
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*buf++ = len;
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memcpy(buf, val, len);
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return buf + len;
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}
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static inline u_int8_t *tlv_put(u_int8_t *buf, u_int8_t tag, u_int8_t len,
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const u_int8_t *val)
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{
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*buf++ = tag;
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*buf++ = len;
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memcpy(buf, val, len);
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return buf + len;
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}
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static inline u_int8_t *tlv16_put(u_int8_t *buf, u_int8_t tag, u_int8_t len,
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const u_int16_t *val)
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{
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*buf++ = tag;
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*buf++ = len;
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memcpy(buf, val, len*2);
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return buf + len*2;
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}
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static inline u_int8_t *tl16v_put(u_int8_t *buf, u_int8_t tag, u_int16_t len,
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const u_int8_t *val)
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{
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*buf++ = tag;
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*buf++ = len >> 8;
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*buf++ = len & 0xff;
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memcpy(buf, val, len);
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return buf + len*2;
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}
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static inline u_int8_t *msgb_tlv16_put(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int16_t *val)
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{
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u_int8_t *buf = msgb_put(msg, TLV16_GROSS_LEN(len));
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return tlv16_put(buf, tag, len, val);
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}
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static inline u_int8_t *msgb_tl16v_put(struct msgb *msg, u_int8_t tag, u_int16_t len,
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const u_int8_t *val)
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{
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u_int8_t *buf = msgb_put(msg, TL16V_GROSS_LEN(len));
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return tl16v_put(buf, tag, len, val);
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}
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static inline u_int8_t *v_put(u_int8_t *buf, u_int8_t val)
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{
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*buf++ = val;
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return buf;
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}
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static inline u_int8_t *tv_put(u_int8_t *buf, u_int8_t tag,
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u_int8_t val)
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{
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*buf++ = tag;
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*buf++ = val;
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return buf;
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}
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static inline u_int8_t *tv16_put(u_int8_t *buf, u_int8_t tag,
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u_int16_t val)
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{
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*buf++ = tag;
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*buf++ = val >> 8;
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*buf++ = val & 0xff;
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return buf;
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}
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static inline u_int8_t *msgb_lv_put(struct msgb *msg, u_int8_t len, const u_int8_t *val)
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{
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u_int8_t *buf = msgb_put(msg, LV_GROSS_LEN(len));
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return lv_put(buf, len, val);
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}
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static inline u_int8_t *msgb_tlv_put(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int8_t *val)
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{
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u_int8_t *buf = msgb_put(msg, TLV_GROSS_LEN(len));
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return tlv_put(buf, tag, len, val);
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}
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static inline u_int8_t *msgb_tv_put(struct msgb *msg, u_int8_t tag, u_int8_t val)
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{
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u_int8_t *buf = msgb_put(msg, 2);
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return tv_put(buf, tag, val);
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}
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static inline u_int8_t *msgb_v_put(struct msgb *msg, u_int8_t val)
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{
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u_int8_t *buf = msgb_put(msg, 1);
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return v_put(buf, val);
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}
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static inline u_int8_t *msgb_tv16_put(struct msgb *msg, u_int8_t tag, u_int16_t val)
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{
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u_int8_t *buf = msgb_put(msg, 3);
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return tv16_put(buf, tag, val);
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}
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static inline u_int8_t *msgb_tlv_push(struct msgb *msg, u_int8_t tag, u_int8_t len, const u_int8_t *val)
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{
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u_int8_t *buf = msgb_push(msg, TLV_GROSS_LEN(len));
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return tlv_put(buf, tag, len, val);
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}
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static inline u_int8_t *msgb_tv_push(struct msgb *msg, u_int8_t tag, u_int8_t val)
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{
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u_int8_t *buf = msgb_push(msg, 2);
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return tv_put(buf, tag, val);
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}
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static inline u_int8_t *msgb_tv16_push(struct msgb *msg, u_int8_t tag, u_int16_t val)
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{
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u_int8_t *buf = msgb_push(msg, 3);
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return tv16_put(buf, tag, val);
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}
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/* TLV parsing */
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struct tlv_p_entry {
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u_int16_t len;
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const u_int8_t *val;
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};
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enum tlv_type {
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TLV_TYPE_FIXED,
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TLV_TYPE_T,
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TLV_TYPE_TV,
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TLV_TYPE_TLV,
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TLV_TYPE_TL16V,
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};
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struct tlv_def {
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enum tlv_type type;
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u_int8_t fixed_len;
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};
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struct tlv_definition {
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struct tlv_def def[0xff];
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};
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struct tlv_parsed {
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struct tlv_p_entry lv[0xff];
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};
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int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def,
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const u_int8_t *buf, int buf_len, u_int8_t lv_tag, u_int8_t lv_tag2);
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#define TLVP_PRESENT(x, y) ((x)->lv[y].val)
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#define TLVP_LEN(x, y) (x)->lv[y].len
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#define TLVP_VAL(x, y) (x)->lv[y].val
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#endif /* _TLV_H */
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