Sending CWR after an RTO is according to RFC 3168 generally required and not only for the DCTCP congestion control. Submitted by: Richard Scheffenegger Reviewed by: rgrimes, tuexen@, Cheng Cui MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D23119
head/sys/netinet/cc/cc_dctcp.c
head/sys/netinet/tcp_input.c
head/sys/netinet/tcp_stacks/rack.c