- introduce t_segqlen, the number of segments in segq/timeq.
the name is from freebsd.
- rather than maintaining a copy of sack blocks (rcv_sack_block[]),
build it directly from the segment list when needed.
- Use the correct IP header length variable for other-than-first packets.
- Remove redundant setting of the original IP header length in the first
packet's csum_data. (It's already set before ip_fragment() is called
in 1.147.)
net.local.stream.pcblist
net.local.dgram.pcblist
net.inet.tcp.pcblist
net.inet.udp.pcblist
net.inet.raw.pcblist
net.inet6.tcp6.pcblist
net.inet6.udp6.pcblist
net.inet6.raw6.pcblist
which allow retrieval of the pcbs in use for those protocols. The
struct involved is 32/64 bit clean and incorporates parts of struct
inpcb, struct unpcb, a bit of struct tcpcb, and two socket addresses.
on gnats-bugs in PR kern/29544.
Tested with an NFS client using default rwsize on an NFS server
with wm(4) interface configured IP4CSUM,TCP4CSUM,UDP4CSUM.
Prior revision required the server to have checksum offload disabled.
it in the TCP stack to test which of the REXMT or PERSIST timer is in use.
This fixes a race condition that could cause "panic: tcp_output REXMT". See
tech-net for details.
http://www.sigusr1.org/~kurahone/tcp-sack-netbsd-02152005.diff.gz
Fixes in that patch for pre-existing TCP pcb initializations were already
committed to NetBSD-current, so are not included in this commit.
The SACK patch has been observed to correctly negotiate and respond,
to SACKs in wide-area traffic.
There are two indepenently-observed, as-yet-unresolved anomalies:
First, seeing unexplained delays between in fast retransmission
(potentially explainable by an 0.2sec RTT between adjacent
ethernet/wifi NICs); and second, peculiar and unepxlained TCP
retransmits observed over an ath0 card.
After discussion with several interested developers, I'm committing
this now, as-is, for more eyes to use and look over. Current hypothesis
is that the anomalies above may in fact be due to link/level (hardware,
driver, HAL, firmware) abberations in the test setup, affecting both
Kentaro's wired-Ethernet NIC and in my two (different) WiFi NICs.
headers and LKM.
Add MKPF; if set to no, don't build and install the pf(4) programs,
headers, LKM and spamd.
Both options default to yes, so nothing changed in the default build.
Reviewed by lukem.
checksum is always in the L4 header by the time we get to this point. It
was occasionally not there due to a bug in tcp_respond, which has since
been fixed.
So, instead just stash the length of the L3 header in the high 16 bits of
csum_data.
(from an offset to the end of the packet), the pseudo-header checksum must be
calculated by software. So, provide it in the TCP/UDP header when
M_CSUM_NO_PSEUDOHDR is set in the interface's if_csum_flags_tx.
The start offset, the end of the IP header, is also provided in the high 16
bits of pkthdr.csum_data. Such that the driver need not examine the packet
at all.
XXX At the request of Jonathan Stone, note that sharing of if_csum_flags_tx &
pkthdr.csum_flags for checksum quirks should be re-evaluated.
