Dear Liu, The reason why I asked you to take a look at the "test_sctp.py" is to see how things are setup and execute the exact steps in the CLI. You'll see things work. You cannot remove the MTU code because that's used to initialize the PMTU and calculate initially the MSS to be sent to the other peer.
Cheers,Marco On Wed, 2018-11-21 at 01:50 +0000, Liu Daolin (刘道林) wrote: > Hi Marco, > > Thanks for your reply. > > Actually I'm trying to read the sctp code recently to want to know how it > works. My requirement is very simply. I need to run sctp server based on vpp > on one VM, and run sctp client without vpp (I have this now) on the other VM. > As my > below email, there will be aborted (core dumped), and I found the place > yesterday, but I don’t know the root reason. You can see below picture: > > > > The sw_if_index is -1, so crashed when get mtu. Maybe I miss something? When I > run actually is CLI command from echo_server.c. As you mentioned, if I run > test_sctp.py, it will work fine? My requirement is only C language as it will > merged > some other code, so I don’t like to run it with python. > > Yesterday, I also try to remove this mtu code, and the crash was disappeared > although the sw_if_index is still -1, and then I start sctp client on the > other VM to send INIT, but the server with vpp seemed be dead (no crash but > cannot > enter any command, seemed dead loop). > > Anyway, I think it's better to try CLI "test echo server" in your side and > find and fix all issues visually. > > > > > > Best regards > 刘道林 (Daolin Liu) > T&W大连市共进科技有限公司 > DALIAN GONGJIN TECHNOLOGY CO.,LTD > 中国大连市高新园区软件园路1A-4-24层 > Floor 24th, 1A-4 Software Park Road, Hi-tech Zone, Dalian, Liaoning, China > 直线(TEL)：(86-411)39996705 > 分机(EXT)：76824 > 手机(Mobile)：(86)13704090959 > > -----邮件原件----- > > 发件人: Marco Varlese [mailto:mvarl...@suse.de] > > > 发送时间: 2018年11月21日 1:06 > > 收件人: Liu Daolin (刘道林); vpp-dev@lists.fd.io > > 主题: Re: [vpp-dev] about sctp > > Hi, > > On Tue, 2018-11-20 at 02:50 +0000, Liu Daolin (刘道林) wrote: > > Hi, > > > > I encountered below Aborted (core dumped) issue: > > > > > > > > When I run "test echo server uri", it's ok for tcp, but crashed immediately > > for sctp. > > > > Please try this in your side and give me advice. I use 18.10. Thanks! > Can you please try to run "make test TEST=test_sctp"? > > > > > > Best regards > > 刘道林 (Daolin Liu) > > T&W大连市共进科技有限公司 > > DALIAN GONGJIN TECHNOLOGY CO.,LTD > > 中国大连市高新园区软件园路1A-4-24层 > > Floor 24th, 1A-4 Software Park Road, Hi-tech Zone, Dalian, Liaoning, China > > 直线(TEL)：(86-411)39996705 > 分机(EXT)：76824 > > 手机(Mobile)：(86)13704090959 > > > > 发件人: Liu Daolin (刘道林) > > > 发送时间: 2018年11月19日 19:23 > > 收件人: 'vpp-dev@lists.fd.io' > > 主题: about sctp > > > > Hi, > > > > I'd like to know some information about sctp. > > > > Is this fully functional? Or just partly? > There are missing pieces to the SCTP implementations. > > > Actually, I want to try simply with CLI to verify sctp basic functions now. > > But it seems that there is no CLI, and the binary APIs are also imperfect. > What do you actually mean by imperfect? Any input (e.g. patch submission) > would > be greatly appreciated! > > > > Do you have any plan in the next release? Including the sample test. > I am planning to create some JIRA ticket(s) so that people can see what's > missing and contribute if they like. Would you be interested? > > > > > Best regards > > 刘道林 (Daolin Liu) > > T&W大连市共进科技有限公司 > > DALIAN GONGJIN TECHNOLOGY CO.,LTD > > 中国大连市高新园区软件园路1A-4-24层 > > Floor 24th, 1A-4 Software Park Road, Hi-tech Zone, Dalian, Liaoning, China > > 直线(TEL)：(86-411)39996705 > 分机(EXT)：76824 > > 手机(Mobile)：(86)13704090959 > > > > > 本电子邮件（包括任何的附件）为本公司保密文件。本文件仅仅可为以上指定的收件人或公司使用，如果阁下非电子邮件所指定之收件人，那么阁下对该邮件部分或全部的泄漏、 > > > 阅览、复印、变更、散布或对邮件内容的使用都是被严格禁止的。如果阁下接收了该错误传送的电子邮件，敬请阁下通过回复该邮件的方式立即通知寄件人，同时删除你所接收到 > > 的文本。 This e-mail may contain confidential and/or privileged information. If > > you are not the intended recipient (or have received this e-mail in error) > > please notify the sender immediately and destroy this e-mail. 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