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| author | Harald Welte <laforge@gnumonks.org> | 2018-06-02 13:34:06 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2018-06-02 12:53:29 +0000 |
| commit | 1fbe3eba757a6ce2f4ea81c7c6548f61f96f9de4 (patch) | |
| tree | 08ca344dc69944212efc85e5b7fc98fff5db1e65 | |
| parent | ebd362dbd2ef817f00f6713b5c4c5580dedd2b50 (diff) | |
tlv: Add TLVP_VAL_MINLEN() to obtain value _if_ length is >= minimum
This is a combination of TLVP_VAP() and TLVP_GET_MINLEN()
Change-Id: Ic5a177941219ebc3a3bceb3f68bdb3b2cacb934b
| -rw-r--r-- | include/osmocom/gsm/tlv.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/osmocom/gsm/tlv.h b/include/osmocom/gsm/tlv.h index a130dc8c..84fd511e 100644 --- a/include/osmocom/gsm/tlv.h +++ b/include/osmocom/gsm/tlv.h @@ -467,6 +467,16 @@ void tlv_def_patch(struct tlv_definition *dst, const struct tlv_definition *src) #define TLVP_GET_MINLEN(_tp, tag, min_len) \ (TLVP_PRES_LEN(_tp, tag, min_len)? &(_tp)->lv[tag] : NULL) +/*! Like TLVP_VAL(), but enforcing a minimum val length. + * \param[in] _tp pointer to \ref tlv_parsed. + * \param[in] tag IE tag to return. + * \param[in] min_len Minimum value length in bytes. + * \returns struct tlv_p_entry pointer, or NULL if not present or too short. + */ +#define TLVP_VAL_MINLEN(_tp, tag, min_len) \ + (TLVP_PRES_LEN(_tp, tag, min_len)? (_tp)->lv[tag].val : NULL) + + /*! Align given TLV element with 16 bit value to an even address * \param[in] tp pointer to \ref tlv_parsed * \param[in] pos element to return |