28Dec2017 [FreeBSD WIKI]

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====== Transport Hangout 28 December 2017 ======

  * When accepting TCP/IPv6 and using net.inet6.ip6.v6only=0, netstat tries to print the IPv6 addresses as IPv4 addresses. The problem is that the endpoint has the INP_IPV4 and the INP_IPV6 flag set. This also confuses squid. A fix is under review at [[https://reviews.freebsd.org/D13514|D13514]].

  * When an SCTP application using an SCTP socket crashes an a core file has to be written, the kernel panics. The reason is that pru_sockaddr and pru_peeraddr are called by soo_fill_kinfo without setting the vnet. However, when pru_sockaddr and pru_peeraddr are called via the syscall interface, the vnet is set. A patch setting the vnet also in soo_fill_kinfo is under review in [[https://reviews.freebsd.org/D13652|D13652]].

  * tuexen@ mentioned that there are some issues when using TCP fastopen with %%FreeBSD%% acting as the server and Mac OS X as a client. It is not yet clear which side is responsible. tuexen@ will investigate or contact someone having done work with TCP fastopen.

  * Next telco: 11 January 2018.