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-rw-r--r--include/openbsc/tlv.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/include/openbsc/tlv.h b/include/openbsc/tlv.h
new file mode 100644
index 00000000..4c007725
--- /dev/null
+++ b/include/openbsc/tlv.h
@@ -0,0 +1,66 @@
+#ifndef _TLV_H
+#define _TLV_H
+
+#include <sys/types.h>
+#include <string.h>
+
+#define TLV_GROSS_LEN(x) (x+2)
+#define TLV16_GROSS_LEN(x) ((2*x)+2)
+
+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 *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 *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 *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_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);
+}
+
+#endif /* _TLV_H */