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| /freebsd-10.3-release/sys/netinet/ | ||
| H A D | tcp.h | diff 212653 Wed Sep 15 10:40:53 MDT 2010 andre Change the default MSS for IPv4 and IPv6 TCP connections from an artificial power-of-2 rounded number to their real values specified in RFC879 and RFC2460. From the history and existing comments it appears that the rounded numbers were intended to be advantageous for the kernel and mbuf system. However this hasn't been the case at for at least a long time. The mbuf clusters used in tcp_output() have enough space to hold the larger real value for the default MSS for both IPv4 and IPv6. Note that the default MSS is only used when path MTU discovery is disabled. Update and expand related comments. Reviewed by: lsteward (including some word-smithing) MFC after: 2 weeks |
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