diff options
Diffstat (limited to 'pySim/utils.py')
| -rw-r--r-- | pySim/utils.py | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/pySim/utils.py b/pySim/utils.py index cdb2926..38cc580 100644 --- a/pySim/utils.py +++ b/pySim/utils.py @@ -500,19 +500,19 @@ def enc_st(st, service, state=1): return s -def dec_epdgid(hexstr): +def dec_addr_tlv(hexstr): """ - Decode ePDG Id to get EF.ePDGId or EF.ePDGIdEm. - See 3GPP TS 31.102 version 13.4.0 Release 13, section 4.2.102 and 4.2.104. + Decode hex string to get EF.P-CSCF Address or EF.ePDGId or EF.ePDGIdEm. + See 3GPP TS 31.102 version 13.4.0 Release 13, section 4.2.8, 4.2.102 and 4.2.104. """ # Convert from hex str to int bytes list - epdgid_bytes = h2i(hexstr) + addr_tlv_bytes = h2i(hexstr) s = "" # Get list of tuples containing parsed TLVs - tlvs = TLV_parser(epdgid_bytes) + tlvs = TLV_parser(addr_tlv_bytes) for tlv in tlvs: # tlv = (T, L, [V]) @@ -531,6 +531,7 @@ def dec_epdgid(hexstr): # First byte in the value has the address type addr_type = tlv[2][0] # TODO: Support parsing of IPv4 and IPv6 + # Address Type: 0x00 (FQDN), 0x01 (IPv4), 0x02 (IPv6), other (Reserved) if addr_type == 0x00: #FQDN # Skip address tye byte i.e. first byte in value list content = tlv[2][1:] @@ -538,20 +539,20 @@ def dec_epdgid(hexstr): return s -def enc_epdgid(epdg_addr, addr_type='00'): +def enc_addr_tlv(addr, addr_type='00'): """ - Encode ePDG Id so it can be stored to EF.ePDGId or EF.ePDGIdEm. - See 3GPP TS 31.102 version 13.4.0 Release 13, section 4.2.102 and 4.2.104. + Encode address TLV object used in EF.P-CSCF Address, EF.ePDGId and EF.ePDGIdEm. + See 3GPP TS 31.102 version 13.4.0 Release 13, section 4.2.8, 4.2.102 and 4.2.104. Default values: - - addr_type: 00 - FQDN format of ePDG Address + - addr_type: 00 - FQDN format of Address """ s = "" # TODO: Encoding of IPv4 and IPv6 address if addr_type == '00': - hex_str = s2h(epdg_addr) + hex_str = s2h(addr) s += '80' + ('%02x' % ((len(hex_str)//2)+1)) + '00' + hex_str return s |