Re: [Tipc-discussion] [BUG]send function cannot send messages whose size are more than 66000 bytes

[Nick Y. <ni...@ho...>]

Jon,

Thank you! I will try to track the bug and report the further progress to 
you.

Best regards,

Nick

>From: Jon Maloy <jon...@er...>
>To: Nick Yin <ni...@ho...>
>CC: hu...@in..., ma...@os..., tip...@li...
>Subject: Re: [Tipc-discussion] [BUG]send function cannot send messages 
>whose size are more than 66000 bytes
>Date: Wed, 19 May 2004 11:47:46 -0400
>
>Ok,
>If you get "Invalid argument" with size > 66000 and SOCK_STREAM that
>means there is a bug. For the other types it is the correct behaviour.
>If you look into the function "send_stream()" in socket.c you will
>see how a big message is fragmented into smaller chunks of 66000 bytes
>(which in their turn are fragmented into ethernet packets further down in 
>the
>stack).
>
>If you follow the logics of send_stream() you may find out what is wrong.
>I am not at all surprised that this does not work right away.
>
>/jon
>
>
>Nick Yin wrote:
>
>>Hi, Jon and Mark
>>
>>In fact i have tested all kinds of socket type, including SOCK_STREAM, 
>>SOCK_SEQPACKET, SOCK_RDM and SOCK_DGRAM, and two connection styles ( 
>>connection-based, connectionless). The tests all failed. Whichever i using 
>>sendto or send to send big message ( > 66000 bytes), they always return -1 
>>and the errno will be 22 ( that is, "Invalid argument").
>>
>>And i also tested the big size message using TCP/IP protocol, it works 
>>well.
>>
>>Would you like to give me some suggestion to fix this bug?
>>
>>Have a nice day!
>>
>>Best regards,
>>
>>Nick Yin
>>
>>(BTW: this is another account of mine :-) )
>>
>>>From: Jon Maloy <jon...@er...>
>>>To: "Yin, Hu" <hu...@in...>
>>>CC: tipc <tip...@li...>
>>>Subject: Re: [Tipc-discussion] [BUG]send function cannot send messages 
>>>whose size are more than 66000 bytes
>>>Date: Wed, 19 May 2004 09:55:21 -0400
>>>
>>>Hi Hu,
>>>It does fragment/defragment messages, but only up to a limit, depending
>>>on the socket type you are using. If you use message oriented sockets,
>>>i.e., SOCK_SEQPACKET,SOCK_RDM or SOCK_DGRAM, it will
>>>only fragment up to MAX_MSG_SIZE, which is indeed 66000 bytes.
>>>
>>>If you use SOCK_STREAM, it will fragment up to a size of 100 Mbyte
>>>per sent "chunk". I must admit that I have still not tested this feature
>>>beyond 66k (this is on my TODO list), so you may quite well run into
>>>bugs here.  Any feedback on this is welcome.
>>>
>>>Regards /Jon
>>>
>>>Yin, Hu wrote:
>>>
>>>>Hi Jon,
>>>>
>>>>I'm a intern of Intel China Software Lab. Now I'm doing TIPC's
>>>>validation job here.
>>>>
>>>>Today I meet a problem. When I write a little program to send/receive
>>>>different sizes message between two programs there will be error( errno:
>>>>22, "Invalid argument") when the size of message is more than 66000
>>>>bytes.
>>>>
>>>>Doesn't TIPC fragment and defragment messages?
>>>>
>>>>Best regards,
>>>>
>>>>Nick Yin
>>>>
>>>>Intel China Software Lab
>>>>
>>>>The content of this email message solely contains my own personal views,
>>>>and not those of my employer.
>>>>
>>>>
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