On Fri, Jul 09 2021, John Goerzen wrote:

> I'm fairly baffled by this.  I ran it under strace, and there's 
> no syscall
> that's returning EOF.  nncp-pkt is easier to analyze under 
> strace, and it does a
> 4096-byte read, gets a 4096-byte result, then crashes with 
> unexpected EOF.
>
> I don't know Go, though...  I'm also baffled at how the test at 
> pkt.go line 163
> could cause an error.
>
> - John
>
> On Fri, Jul 09 2021, John Goerzen wrote:
>
>> Hello,
>>
>> I have a 3GB packet that was transferred from its origin to my 
>> gateway machine
>> via nncp-call.  When called on it, nncp-check works fine and 
>> verifies its
>> integrity.  However:
>>
>> nncp@nncp:~$ nncp-toss -progress
>> 2021-07-09T15:10:27Z ERROR Tossing
>> mccoy/74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q:
>> unmarshal: xdr:DecodeFixedOpaque: unexpected EOF while decoding 
>> 8 bytes -
>> read:
>> '[]'
>>
>> And the log shows:
>>
>> When: 2021-07-09T15:12:13.896311727Z
>> Err: xdr:DecodeFixedOpaque: unexpected EOF while decoding 8 
>> bytes - read: '[]'
>> Who: rx-unmarshal
>> Node: NE2CD32WK62N3QWWQLJUZXVX2WZAIMM7DBIXQVJTFDSXHAWSULBQ
>> Pkt: 74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q
>> Nice: 226
>> Msg: Tossing 
>> mccoy/74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q:
>> unmarshal
>>
>> (this is a transitional packet)
>>
>> Also:
>>
>> nncp@nncp:~$ nncp-pkt -dump <
>> /var/spool/nncp/NE2CD32WK62N3QWWQLJUZXVX2WZAIMM7DBIXQVJTFDSXHAWSULBQ/rx/74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q
>> main.go:163: unexpected EOF
>>
>> These commands that return with "unexpected EOF" are returning 
>> almost
>> immediately.  They could not possibly have processed 3GB like 
>> nncp-check does.
>> If I omit -dump from nncp-pkt, it works fine.  I tried 
>> reblocking with dd, and
>> that didn't help either.
>>
>> This occurs both with go 1.14 and go 1.15.
>>
>> The only unique thing here is that it's from a new node on my 
>> network.
>>
>> Other packets from that node were processed successfully, 
>> though they were
>> much
>> smaller.  I tried removing the .hdr file and that didn't help 
>> either (it was
>> recreated).
>>
>> Thanks!
>>
>> - John