diff options
| author | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2022-03-14 22:27:57 +0300 |
|---|---|---|
| committer | laforge <laforge@osmocom.org> | 2022-03-16 12:47:54 +0000 |
| commit | af2972e26f2704e240652fb5ec0508ee1bc6a6b7 (patch) | |
| tree | 0fb6d278e253a8f2fb8593404f650f679ade6c3a | |
| parent | 4483a22b1ddf7c7c922129697e1ef29ba5d278e5 (diff) | |
bsc: add f_cipher_mode_bssmap_to_rr()
Change-Id: I6cc8cbed96f2838af1b0e41c5dfa6760c45d9ad1
Related: SYS#5838
| -rw-r--r-- | bsc/MSC_ConnectionHandler.ttcn | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn index a37a3b8a..b0daf614 100644 --- a/bsc/MSC_ConnectionHandler.ttcn +++ b/bsc/MSC_ConnectionHandler.ttcn @@ -797,6 +797,26 @@ function f_cipher_mode_bssmap_to_rsl(OCT1 alg_bssmap) return RSL_AlgId } } +/* Convert the cipher representation on BSSMAP to the one used on RR (3GPP TS 44.018) */ +function f_cipher_mode_bssmap_to_rr(OCT1 alg_bssmap) return BIT3 +{ + select (alg_bssmap) { + case ('01'O) /* A5/0 */ { return '000'B; } /* SC=0 */ + case ('02'O) /* A5/1 */ { return '000'B; } /* SC=1 */ + case ('04'O) /* A5/2 */ { return '001'B; } /* SC=1 */ + case ('08'O) /* A5/3 */ { return '010'B; } /* SC=1 */ + case ('10'O) /* A5/4 */ { return '011'B; } /* SC=1 */ + case ('20'O) /* A5/5 */ { return '100'B; } /* SC=1 */ + case ('40'O) /* A5/6 */ { return '101'B; } /* SC=1 */ + case ('80'O) /* A5/7 */ { return '110'B; } /* SC=1 */ + case else { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Unexpected Encryption Algorithm: " & + oct2str(alg_bssmap)); + return '000'B; + } + } +} + function f_verify_encr_info(RSL_Message rsl) runs on MSC_ConnHdlr { var RSL_IE_Body encr_info; var RSL_AlgId alg_rsl; |