path: root/include/osmocom
diff options
authorHarald Welte <laforge@gnumonks.org>2019-02-13 22:23:13 +0100
committerHarald Welte <laforge@gnumonks.org>2019-05-19 07:33:32 +0000
commit8006f5393e21750558a01c780641831d925382ee (patch)
tree7cb67ca98a93395015075d540613dcc46a356e9e /include/osmocom
parente0c5d700ae4289cf1f4f5fae1d061b666387cb3d (diff)
TLV: Add one-shot TLV encoder
So far, the TLV code contained two types of functions * tlp_parse() to parse all TLVs according to definition into tlvp_parsed * various helper functions to encode individual TLVs during message generation This patch implements the inverse of tlv_parse(): tlv_encode(), which takes a full 'struct tlv_pared' and encodes all IEs found in it. The order of IEs is in numerically ascending order of the tag. As many protocols have different IE/TLV ordering requirements, let's add a tlv_encode_ordered() function where the caller can specify the TLV ordering during the one-shot encode. Change-Id: I761a30bf20355a9f80a4a8e0c60b0b0f78515efe
Diffstat (limited to 'include/osmocom')
1 files changed, 6 insertions, 0 deletions
diff --git a/include/osmocom/gsm/tlv.h b/include/osmocom/gsm/tlv.h
index d0c95522..bb0e8fc9 100644
--- a/include/osmocom/gsm/tlv.h
+++ b/include/osmocom/gsm/tlv.h
@@ -457,6 +457,12 @@ int tlv_parse2(struct tlv_parsed *dec, int dec_multiples,
/* take a master (src) tlv def and fill up all empty slots in 'dst' */
void tlv_def_patch(struct tlv_definition *dst, const struct tlv_definition *src);
+int tlv_encode_one(struct msgb *msg, enum tlv_type type, uint8_t tag,
+ unsigned int len, const uint8_t *val);
+int tlv_encode(struct msgb *msg, const struct tlv_definition *def, const struct tlv_parsed *tp);
+int tlv_encode_ordered(struct msgb *msg, const struct tlv_definition *def, const struct tlv_parsed *tp,
+ const uint8_t *tag_order, unsigned int tag_order_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