SCTP : problems in sending ASCONF chunks

[Michael Tuexen]

On Oct 23, 2011, at 11:33 AM, jyl_2006 wrote:

> Hi,
> I use FreeBSD 9.0 Beta2 on two computers . 
> One have  one wireless card, and the other one has two wireless card.
> 
> When I use sctp with the feature of automatic address reconfiguration , I
> notice that no Asconf Chunk send.
> 
> Here are INIT chunk message about association:
> Both in the INIT chunk and INIT ACK chunk , the Supported Extensions
> Parameter field indicates that ASCONF, ASCONF-ACK, FORWARD-TSN, PKTDROP,
> STREAM_RESET and AUTH are supported.
> 
> So I think it will be ok ,if I use sctp_bindx() to bind a ip address, but no
> ASCONF chunk shows in Wireshark.
> 
> After that ,I recompiled the kernel with the option of debug enable, in the
> file from dmesg ，I notice that kernel get the new ip address ,but it does
> not send this ASCONF CHUNK.
> Here are messages:
> 
> 192.168.1.50 is the new ip address that I want to bind to the association.
Can you provide the IP-addresses you use?

Best regards
Michael
> 
> USR Send complete qo:0 prw:1863859 unsent:18 tf:18 cooq:1 toqs:18 err:0
> Ok laddr->ifa:0xc7744280 is possible, asconf_queue_mgmt: inserted asconf
> ADD_IP_ADDRESS: IPv4 address: 192.168.1.50:0
> m-c-o put out 0
> Ok, we have put out 0 chunks
> sctp_input() length:28 iphlen:20
> sctp_input(): Packet of length 48 received on wlan0 with csum_flags 0x0.
> Ok, Common input processing called, m:0xc721dc00 iphlen:20 offset:32
> length:48 stcb:0xc718e5dc
> stcb:0xc718e5dc state:8
> sctp_process_control: iphlen=20, offset=32, length=48 stcb:0xc718e5dc
> sctp_process_control: processing a chunk type=3, len=16
> 
> 
> --
> View this message in context: http://freebsd.1045724.n5.nabble.com/SCTP-problems-in-sending-ASCONF-chunks-tp4929128p4929128.html
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