Hi Yang,

> ---
>  src/stkutil.c |   20 ++++++++++++++++++++
>  src/stkutil.h |    9 +++++++++
>  2 files changed, 29 insertions(+), 0 deletions(-)
> 
> diff --git a/src/stkutil.c b/src/stkutil.c
> index 0d4be68..d690f51 100644
> --- a/src/stkutil.c
> +++ b/src/stkutil.c
>  /*
> + * According to 102.223 Section 8.61 the length of CTLV is 1 byte. This
>  means + * that the maximum size is 127 according to the rules of CTLVs.
> + */
> +struct stk_access_technology {
> +	unsigned char tech[127];
> +	unsigned char len;
> +};
> +

Please look at 3GPP TS 31.124, my interpretation is that access technology is 
a single byte.  102.223 is not really helping here.

Regards,
-Denis