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dexter gerrit-no-reply at lists.osmocom.orgdexter has uploaded this change for review. ( https://gerrit.osmocom.org/c/pysim/+/24010 ) Change subject: utils: split string formatting from dec_addr_tlv ...................................................................... utils: split string formatting from dec_addr_tlv The function dec_addr_tlv() takes an encoded FQDN or IPv4 address and fromats it into a human readable string that contains the human readable form and the encoded hex form. Unfortunately this limits the usecase of dec_addr_tlv. Lets split the string generation into a separate function so that we can use dec_addr_tlv universally Change-Id: Id017b0786089adac4d6c5be688742eaa9699e529 Related: OS#4963 --- M pySim/cards.py M pySim/utils.py 2 files changed, 21 insertions(+), 7 deletions(-) git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/10/24010/1 diff --git a/pySim/cards.py b/pySim/cards.py index 719bf0c..71cc3b8 100644 --- a/pySim/cards.py +++ b/pySim/cards.py @@ -29,6 +29,19 @@ from smartcard.util import toBytes from pytlv.TLV import * +def format_addr(addr, addr_type='00'): + """helper function to format an FQDN or IPv4 address into a printable string""" + res = "" + if addr_type == '00': #FQDN + res += "\t%s # %s\n" % (s2h(addr), addr) + elif addr_type == '01': #IPv4 + octets = addr.split(".") + addr_hex = "" + for o in octets: + addr_hex += ("%02x" % int(o)) + res += "\t%s # %s\n" % (addr_hex, addr) + return res + class Card(object): def __init__(self, scc): @@ -299,7 +312,8 @@ def read_epdgid(self): (res, sw) = self._scc.read_binary(EF_USIM_ADF_map['ePDGId']) if sw == '9000': - return (dec_addr_tlv(res), sw) + addr, addr_type = dec_addr_tlv(res) + return (format_addr(addr, addr_type), sw) else: return (None, sw) @@ -358,7 +372,8 @@ for i in range(0, rec_cnt): (res, sw) = self._scc.read_record(EF_ISIM_ADF_map['PCSCF'], i + 1) if sw == '9000': - content = dec_addr_tlv(res) + addr, addr_type = dec_addr_tlv(res) + content = format_addr(addr, addr_type) pcscf_recs += "%s" % (len(content) and content or '\tNot available\n') else: pcscf_recs += "\tP-CSCF: Can't read, response code = %s\n" % (sw) diff --git a/pySim/utils.py b/pySim/utils.py index bcfa2ac..b788826 100644 --- a/pySim/utils.py +++ b/pySim/utils.py @@ -606,8 +606,6 @@ # Convert from hex str to int bytes list addr_tlv_bytes = h2i(hexstr) - s = "" - # Get list of tuples containing parsed TLVs tlvs = TLV_parser(addr_tlv_bytes) @@ -632,15 +630,16 @@ if addr_type == 0x00: #FQDN # Skip address tye byte i.e. first byte in value list content = tlv[2][1:] - s += "\t%s # %s\n" % (i2h(content), i2s(content)) + return (i2s(content), '00') + elif addr_type == 0x01: #IPv4 # Skip address tye byte i.e. first byte in value list # Skip the unused byte in Octect 4 after address type byte as per 3GPP TS 31.102 ipv4 = tlv[2][2:] content = '.'.join(str(x) for x in ipv4) - s += "\t%s # %s\n" % (i2h(ipv4), content) + return (content, '01') - return s + return (None, None) def enc_addr_tlv(addr, addr_type='00'): """ -- To view, visit https://gerrit.osmocom.org/c/pysim/+/24010 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: pysim Gerrit-Branch: master Gerrit-Change-Id: Id017b0786089adac4d6c5be688742eaa9699e529 Gerrit-Change-Number: 24010 Gerrit-PatchSet: 1 Gerrit-Owner: dexter <pmaier at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210430/f1c594b3/attachment.htm>