Mercurial > code > home > repos > homeauto
changeset 401:a30ae57209b9
tags module and pynfc build steps
Ignore-this: 11baf8329ae6e942eba2330a15abe675
| author | drewp@bigasterisk.com |
|---|---|
| date | Wed, 27 Feb 2019 10:28:44 -0800 |
| parents | 1b303e7542a3 |
| children | 2e684f93ec25 |
| files | service/rfid_pn532_py/Dockerfile.pyfreefare service/rfid_pn532_py/makefile service/rfid_pn532_py/tags.py service/rfid_pn532_py/tags_test.py |
| diffstat | 4 files changed, 145 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/service/rfid_pn532_py/Dockerfile.pyfreefare Wed Feb 27 10:28:44 2019 -0800 @@ -0,0 +1,9 @@ +FROM bang6:5000/base_x86 + +WORKDIR /opt + + +RUN apt-get install -y python-clang-6.0 libclang-6.0-dev +RUN pip install ctypeslib2 + +RUN apt-get install -y libnfc5 libfreefare0 libnfc-dev libfreefare-dev
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/service/rfid_pn532_py/makefile Wed Feb 27 10:28:44 2019 -0800 @@ -0,0 +1,21 @@ + +pyfreefare_build_image: Dockerfile.pyfreefare + docker build --file Dockerfile.pyfreefare -t pyfreefare_build:latest . + +pyfreefare/nfc.py: pyfreefare_build_image pyfreefare/nfc.h + docker run --rm --net=host -v /my/proj/homeauto/service/rfid_pn532_py/pyfreefare:/opt/pyfreefare --name pyfreefare_build pyfreefare_build:latest \ + clang2py -o /opt/pyfreefare/nfc.py \ + --target x86_64-Linux \ + --clang-args="-I=/usr/include/x86_64-linux-gnu -I/usr/lib/llvm-6.0/lib/clang/6.0.0/include -I/usr/lib/llvm-6.0/lib/ -v -xc" \ + /opt/pyfreefare/nfc.h + +pyfreefare/freefare.py: pyfreefare_build_image pyfreefare/freefare.py + docker run --rm --net=host -v /my/proj/homeauto/service/rfid_pn532_py/pyfreefare:/opt/pyfreefare --name pyfreefare_build pyfreefare_build:latest \ + clang2py -o /opt/pyfreefare/freefare.py \ + --target x86_64-Linux \ + --clang-args="-I=/usr/include/x86_64-linux-gnu -I/usr/lib/llvm-6.0/lib/clang/6.0.0/include -I/usr/lib/llvm-6.0/lib/ -v -xc" \ + /opt/pyfreefare/freefare.h + +#pyfreefare/nfc.py pyfreefare/freefare.py +test_tags: tags.py tags_test.py + PYTHONPATH=pyfreefare nose2-3 tags_test
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/service/rfid_pn532_py/tags.py Wed Feb 27 10:28:44 2019 -0800 @@ -0,0 +1,113 @@ +import nfc, freefare +import logging +log = logging.getLogger('tags') + +class NfcDevice(object): + def __init__(self): + context = ptr nfc.nfc_context + nfc.nfc_init(context) + + ''' + var connstrings: array[10, nfc.connstring] + var n = nfc.list_devices(result.context, + cast[ptr nfc.connstring](addr connstrings), + len(connstrings)) + info(&"{n} connection strings") + for i in 0 ..< n: + info(&" dev {i}: {join(connstrings[i])}") + + info("open dev") + result.dev = nfc.open(result.context, connstrings[0]) + let dev = result.dev + check(device_get_last_error(dev), + &"nfc.open failed on {join(connstrings[0])}") + ''' + + def __del__(self): + nfc.close(self.dev) + nfc.exit(self.context) + + def getTags(self): + log.info("getting tags") + t0 = time.time() + ret = freefare.freefare_get_tags(self.dev) + if not ret: raise IOError("freefare_get_tags returned null") + log.info(f"found tags in {time.time() - t0}") + return ret + + # freefare lib wants to free all the tag memory, so process them in a + # callback and don't keep them outside that. + def forAllTags(self, onTag: (NfcTag) -> None): + ret = self.getTags() + for tagp in ret: + if isNil(tagp): + break + if cast[int](tagp) < 10: + # pointer value looks wrong + break + + let tag: FreefareTag = tagp[] + if isNil(tag): + break + onTag(NfcTag(tag: tag)) + freefare.freefare_free_tags(ret) + +def blockFromString(s: str): + result = MifareClassicBlock() + for i in 0..result.high: + if i < s.len: + result[i] = s[i] + else: + result[i] = '\x00' + return result + +proc stringFromBlock(b: MifareClassicBlock) -> string + return ''.join(b)#cast[array[16,char]](b).join + +type TagArray {.unchecked.} = array[999, ptr FreefareTag] + +pubkey = ['\xff', '\xff', '\xff', '\xff', '\xff', '\xff'] + +def check(ret, msg): + if ret != 0: + raise IOError(msg) + +class NfcTag(object): + def __init__(self, tag): #FreefareTag + self.tag = tag + + def tagType(self): freefare.freefare_tag_type = + return freefare.freefare_get_tag_type(self.tag) + + def uid(self): + return freefare.freefare_get_tag_uid(self.tag) + + def connect(self): + check(freefare.mifare_classic_connect(self.tag), "connect") + + def disconnect(self): + check(freefare.mifare_classic_disconnect(self.tag), "disconnect") + + def readBlock(self, blockNumber: int) -> string: + blockNum = cast[freefare.MifareClassicBlockNumber](blockNumber) + check(freefare.mifare_classic_authenticate( + self.tag, blockNum, pubkey, freefare.MFC_KEY_A), + &"mifare_classic_authenticate() failed") + + var data: freefare.MifareClassicBlock + + check(mifare_classic_read(self.tag, blockNum, addr data), + "classic_read() failed") + return toString(data) + + def writeBlock(self, + blockNumber: int, + data: freefare.MifareClassicBlock) = + var blocknum = cast[freefare.MifareClassicBlockNumber](blockNumber) + check(freefare.mifare_classic_authenticate( + self.tag, blocknum, pubkey, freefare.MFC_KEY_A), + &"mifare_classic_authenticate() failed") + + check(mifare_classic_write(self.tag, blocknum, data), + "classic_write() failed") + log.info(&" wrote block {blocknum}: {data}")