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freetds - Re: TDS 7.0 login packet is correct ?

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  • From: "Fernando" <nulll AT bol.com.br>
  • To: freetds AT franklin.oit.unc.edu
  • Subject: Re: TDS 7.0 login packet is correct ?
  • Date: Fri, 29 Mar 2002 21:03:45 -0500


Hello,

Denove: Thank you very mutch by attetion Brian Bruns.

Why the packet size 00A8 is incorrect ?

The integer fields are in big endian. In TDS70 packet I have tha
represent the decimal 86 such as 5600 and not 0056, by sample ? I can say
how is it?

Could you answer the following box ?

---------------------------------------------------
Tipo | Decimal | Big endian | Little endian |
---------------------------------------------------
int8 | 5 | 0x05 | ? |
---------------------------------------------------
int8 | 20 | 0x14 | ? |
---------------------------------------------------
int16 | 210 | 0x00D2 | ? |
---------------------------------------------------
int32 | 320 | 0x00000140 | ? |
---------------------------------------------------

Regards!!


> Sorry, I only had a brief couple of minutes to look at the packet....your
> netlib packet size is 00A8 which is not correct. And many of the integer
> fields appear to be big endian, TDS 7 is a little endian only protocol.
>
> Brian
>
> On Fri, 29 Mar 2002, Fernando wrote:
>
> > Hello,
> >
> >
> > Then which wrong points in login packet ?
> >
> > "fernando" = 6600650072006E0061006E0064006F00 or 6665726E616E646F ???
> >
> > Could you see my old message in this news (Subject:Any question about TDS)
> > ??
> >
> >
> >
> > Regards!!
> >
> >
> > > oops, my bad on the strings, yes you are correct. The other things are
> > > still problematic though.
> > >
> > > Brian
> > >
> > > On Fri, 29 Mar 2002, Fernando wrote:
> > >
> > > > Hello,
> > > >
> > > >
> > > > Tank you very mutch by attetion Brian Bruns. In your analyse you
> > > > did
> > > > question the following points:
> > > >
> > > > > 00D8 packet size bigger than the netlib header, and apparently in
> > > > > the
> > > > > wrong byte order
> > > > > 0066 pos password, 0x56 + 0x08 != 0x66
> > > > > 0082 pos servername, 0x72 + 0x08 != 82
> > > > > 0094 pos libname, 0x82 + 9 != 0x94
> > > > > 00A8 pos lang, 0x94 + A != A8
> > > > > 00A8 size of (8 + 6 + 8 + 9 + 10 = 41 + 86 (fixed portion) = 127 =
> > > > > 0x7F)
> > > > > so your variable data ends at 0x7F (i think) but your numbers are
> > > > > off all
> > > > > the way through.
> > > >
> > > >
> > > > I see this code in freetds java source:
> > > >
> > > > //....
> > > > short len = (short)(86 + 2 * (user.length() +
> > > > password.length() +
> > > > appName.length() +
> > > > serverName.length() +
> > > > libName.length()));
> > > > //....
> > > > comm.appendTdsShort((short)user.length()); <-- 1x
> > > > curPos += user.length() * 2; <-- 2x
> > > > //....
> > > >
> > > > Then, i puting the double of strings length (mybe Unicode):
> > > >
> > > > 0x56 + 0x08 != 0x66 -- but, 0x56 + 2*(0x08) = 0x66
> > > > 0x72 + 0x08 != 82 -- but, 0x72 + 2*(0x08) = 0x82
> > > > 0x82 + 9 != 0x94 -- but, 0x82 + 2*(0x09) = 0x94
> > > > 0x94 + A != A8 -- but, 0x94 + 2*(0x0A) = 0xA8
> > > > 00A8 size of (8 + 6 + 8 + 9 + 10 = 41 + 86 (fixed portion) = 127 =
> > > > 0x7F)
> > > > but, 2*((8 + 6 + 8 + 9 + 10) = 82 + 86 (fixed portion) = 168 =
> > > > 0xA8)
> > > >
> > > > I'm confused. Wich way is correct ?
> > > >
> > > >
> > > > "fernando" = 6600650072006E0061006E0064006F00 or 6665726E616E646F
> > > > ???
> > > >
> > > >
> > > > Could you see my message(Any question about TDS) ??
> > > >
> > > >
> > > > Regards !!
> > > >
> > > >
> > > > > On Fri, 29 Mar 2002, Fernando wrote:
> > > > >
> > > > > > Hello All,
> > > > > >
> > > > > > Anybody know say me if the TD7.0 login packet following is valid ?
> > > > > >
> > > > > >
> > > > > > UserName = 'fernando'
> > > > > > Pwd = 'abc123'
> > > > > > ServerName = 'Satellite'
> > > > > > AppName = 'TDSTrace'
> > > > > > LibraryName = 'DB-Library'
> > > > > >
> > > > > >
> > > > > /* netlib header */
> > > > > 10 0x10 TDS 7 login packet identifier
> > > > > 01 Last packet indicator ( true )
> > > > > 00A8 packet size (168 octets)
> > > > > 00001000 unknown
> > > > > /* TDS payload */
> > > > > 00D8 packet size bigger than the netlib header, and apparently in
> > > > > the
> > > > > wrong byte order
> > > > > 0000000000
> > > > > five 0x00's, ok
> > > > > 70 version number, ok
> > > > > 00000000000000
> > > > > seven 0x00's, ok
> > > > > 0682F2F8FF00000000E003000088FFFFFF36040000
> > > > > magic, agrees with mine, ok
> > > > > 0056 position of hostname, ok
> > > > > 0000 length of hostname, ok
> > > > > 0056 pos of username, ok
> > > > > 0008 len of username, ok
> > > > > 0066 pos password, 0x56 + 0x08 != 0x66
> > > > > 0006 len password, ok
> > > > > 0072 pos appname, ok
> > > > > 0008 len appname, ok
> > > > > 0082 pos servername, 0x72 + 0x08 != 82
> > > > > 0009 len servername, ok
> > > > > 0000 pos unknown
> > > > > 0000 len unknown
> > > > > 0094 pos libname, 0x82 + 9 != 0x94
> > > > > 000A len libname, ok
> > > > > 00A8 pos lang, 0x94 + A != A8
> > > > > 0000 len lang, ok
> > > > > 00A8 pos dbname, ok
> > > > > 0000 len dbname, ok
> > > > > 0040339A6B50
> > > > > magic2, ok
> > > > > 00A8 size of (8 + 6 + 8 + 9 + 10 = 41 + 86 (fixed portion) = 127 =
> > > > > 0x7F)
> > > > > so your variable data ends at 0x7F (i think) but your numbers are
> > > > > off all
> > > > > the way through.
> > > > >
> > > > > 003000D800006600650072006E0061006E0064006F00610062006300310032003300540044005300540072006100630065006C006F00630061006C0068006F0073007400440042002D004C006900620072006100720079004E544C4D5353500001000000068200000000000000000000000000000000000000000000300000000000000030000000
> > > > > >
> > > > > > Regards!
> > > > > >
> > > >
> > > > ---
> > > > You are currently subscribed to freetds as: [camber AT ais.org]
> > > > To unsubscribe, forward this message to $subst('Email.Unsub')
> > > >
> >
> > ---
> > You are currently subscribed to freetds as: [camber AT ais.org]
> > To unsubscribe, forward this message to $subst('Email.Unsub')
> >




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