Got Error Packet Tftp Aborted
for pxeboot option negotiation? Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] On Mon, 20 Feb 2012 15:09:10 -0500 Ed Maste
the client is asking for option negotiation from the TFTP server. Basically wireshark has helped me determine that the communication goes like this. Client (port 10545)-> Server (port 69) Read request for file.exe - Transfer type: octet, blksize\000=512\000, tsize\000=0\000 Server (port 52104) -> Client (port 10545) option acknowledgement, blksize\000=512\000, tsize\000=994464\000 Client (port 10545) -> Server (port 52104 Error Code, Code: Option Negotiation failed: Message error code 8 client or user aborted transfer A 2nd attempt is immediately https://lists.freebsd.org/pipermail/freebsd-hackers/2012-February/037825.html tried again but this time with out the tsize option. Client -> Server Read request for file.exe - Transfer type: octet, blksize\000=8192\000 Server -> Client option acknowledgement, blksize\000=8192\000 Client -> Server acknowledgement, Block:0 It is then fine. So either the client cant get its OACK or options acknowledgement back to the server or the client is just https://ask.wireshark.org/questions/22519/tftp-transfer-option-negotiation-failed-error-8-packet-trace outright refusing the servers option acknowledgement and then cancels the transfer. I cant do a shark on the client because it is in firmware booting mode, and I dont have a switch that can do port mirroring. I have scoured the inter webs for some kind of a solution to whats going on. Maybe the experts here can give a helping hand. Thanks in advance!!! osx tftp macosx netboot asked 01 Jul '13, 13:14 ClassicII 1●1●1●3 accept rate: 0% edited 01 Jul '13, 14:20 One Answer: oldestnewestmost voted 1 It looks to me that the client first tries to negotiate a blocksize of 512 and requests the filesize. Then when it does receive the filesize, it decides to use a blocksize of 8192 instead of 512. No need to use the tsize option again, as the filesize is already known. According to the RFC, the tftp server should not return a tsize option in the response to the second request. Did you really see that in the option acknowledge
time a diskless client boots: Feb 20 00:56:38 TPC-D4-35 tftpd[55229]: Got ERROR packet: TFTP Aborted It turns out that http://osdir.com/ml/freebsd-hackers/2012-02/msg00201.html the pxeboot client (from Intel) first performs a TFTP read request with the tsize option to which it receives an acknowledgement containing the size of the file to be transferred. Then it sends back an error response to abort the transfer, and sends the read request again (without the tsize option). The sequence of packets got error is: 1. C->S TFTP Read Request, File: pxeboot, Transfer type: octet, tsize=0 2. S->C TFTP Option Acknowledgement, tsize=239616 3. C->S TFTP Error Code, Code: Not defined, Message: TFTP Aborted 4. C->S TFTP Read Request, File: pxeboot, Transfer type: octet, blksize=1456 5. S->C TFTP Option Acknowledgement, blksize=1456 6. C->S TFTP Acknowledgement, Block: 0 7. S->C TFTP got error packet Data Packet, Block: 1 ... I'd like to avoid logging the error here, for the sake of this pxeboot client and any other tftp clients that might check options without actually starting a transfer. Anyone opposed to removing it? (A proposed patch is at http://people.freebsd.org/~emaste/tftpd.diff). -Ed _______________________________________________ freebsd-hackers@xxxxxxxxxxx mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@xxxxxxxxxxx" Thread at a glance: Previous Message by Date: Re: devd based AUTOMOUNTER Hi, I removed the state_lock and stat_unlock mechanisms as they appeared to be not needed, I have shufled with 3 drives all the time and the 'integrity' has not been lost, at it was a lot faster, because the lock always had to wait for the 'slowest' drive (in term of initializing the device, like USB hard drive). I simplified the 'attach' section a lot, now each filesystem contains only check/fsck (if possible), mount and log info. I also simplified and improved the 'detach' section a little. I have added an option