No! I'm using current version. the link was just for showing.! 2016-02-21 22:14 GMT+09:00 Marcus Müller <[email protected]>:
> Hi, > > thanks! Now it's clear what you're using :) > Is there a reason why you used a link to an outdated version of the file > from 2011? > > Best regards, > Marcus > > > On 21.02.2016 14:02, SangHyuk Kim wrote: > > I'm using "packet_decoder" (http://goo.gl/7uVDDa) > > > > 2016-02-21 21:51 GMT+09:00 Marcus Müller <[email protected]>: > >> Hi, >> >> the problem is that the string "packet decoding" doesn't appear anywhere >> in the current GNU Radio source code, so I'm still not sure which block you >> are using. Also, crc.check_crc32 is used in two different blocks, so I >> can't even tell this way what we are talking about :( >> Can you actually make sure twice you got the letter-for-letter right name >> of the "packet decoding" block? >> >> Best regards, >> marcis >> >> >> >> On 21.02.2016 13:38, SangHyuk Kim wrote: >> >> Thank Marcus. >> >> "packet decoding" recovers message from received packet >> >> and i got false from crc.py >> >> def check_crc32(s): >> if len(s) < 4: >> return (False, '') >> msg = s[:-4] >> #print "msg = '%s'" % (msg,) >> actual = digital.crc32(msg) >> (expected,) = struct.unpack(">I", s[-4:]) >> #print "actual =", hex(actual), "expected =", hex(expected) >> * print actual == expected* >> return (actual == expected, msg) >> >> 2016-02-21 20:52 GMT+09:00 Marcus Müller < <[email protected]> >> [email protected]>: >> >>> Dear Sang Hyuk Kim, >>> >>> what "packet decoding" are you specifically talking about, and could you >>> show us the code you've modified? >>> >>> Best regards, >>> Marcus >>> >>> >>> On 21.02.2016 12:32, SangHyuk Kim wrote: >>> >>> Hi, I transmit simple text file using two USRP N210 >>> >>> Tx) >>> file source -> packet encoding -> mod(GMSK) -> usrp sink >>> >>> Rx) >>> usrp source -> demod(GMSK) -> packet decoding -> file sink >>> >>> >>> To make corrupt packet, I tried to modify part of crc check >>> >>> I guess if the crc of received packet doesn't match with original one, >>> receiver would discard the packet. >>> >>> However, I found receiver accepts every packet even if crc check returns >>> 'false'. >>> (I expected receiver accepts packet only pass crc check by 'true') >>> >>> Why it always return false and how can I corrupt packet with other ways >>> ? >>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing >>> [email protected]https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> [email protected] >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> >> >> > >
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