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freebsd-dev/sys/netinet6
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Bill Paul 6f8aee2268 Fix a bug which I discovered recently while doing IPv6 testing at 
Wind River. In the IPv4 output path, one of the tests in ip_output()
checks how many slots are actually available in the interface output
queue before attempting to send a packet. If, for example, we need
to transmit a packet of 32K bytes over an interface with an MTU of
1500, we know it's going to take about 21 fragments to do it. If
there's less than 21 slots left in the output queue, there's no point
in transmitting anything at all: IP does not do retransmission, so
sending only some of the fragments would just be a waste of bandwidth.
(In an extreme case, if you're sending a heavy stream of fragmented
packets, you might find yourself sending nothing by the first fragment
of all your packets.) So if ip_output() notices there's not enough
room in the output queue to send the frame, it just dumps the packet
and returns ENOBUFS to the app.

It turns out ip6_output() lacks this code. Consequently, this caused
the netperf UDPIPV6_STREAM test to produce very poor results with large
write sizes. This commit adds code to check the remaining space in the
output queue and junk fragmented packets if they're too big to be
sent, just like with IPv4. (I can't imagine anyone's running an NFS
server using UDP over IPv6, but if they are, this will likely make them
a lot happier. :)
2004-05-14 03:57:17 +00:00
..
ah6.h
ah_aesxcbcmac.c
ah_aesxcbcmac.h
ah_core.c
ah_input.c
ah_output.c
ah.h
dest6.c
esp6.h
esp_aesctr.c
esp_aesctr.h
esp_core.c
esp_input.c
esp_output.c
esp_rijndael.c
esp_rijndael.h
esp.h
frag6.c
icmp6.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
icmp6.h
in6_cksum.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6_gif.c
in6_gif.h
in6_ifattach.c
in6_ifattach.h
in6_pcb.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6_pcb.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6_prefix.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6_prefix.h
in6_proto.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6_rmx.c
in6_src.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6_var.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
in6.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
ip6_ecn.h
ip6_forward.c
ip6_fw.c
ip6_fw.h
ip6_id.c
ip6_input.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
ip6_mroute.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
ip6_mroute.h
ip6_output.c Fix a bug which I discovered recently while doing IPv6 testing at 2004-05-14 03:57:17 +00:00
ip6_var.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
ip6.h
ip6protosw.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
ipcomp6.h
ipcomp_core.c
ipcomp_input.c
ipcomp_output.c
ipcomp.h
ipsec6.h
ipsec.c
ipsec.h
mld6_var.h
mld6.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
nd6_nbr.c ifp has the same value as rt->rti_ifp so remove the dependency 2004-04-19 08:02:52 +00:00
nd6_rtr.c Replace Bcopy/Bzero with 'the real thing' as in the rest of the file. 2004-04-18 11:45:28 +00:00
nd6.c fix the change of interface in nd6_storelladdr for multicast 2004-04-26 20:31:46 +00:00
nd6.h
pim6_var.h
pim6.h
raw_ip6.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
raw_ip6.h
README
route6.c
scope6_var.h
scope6.c
tcp6_var.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
udp6_output.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
udp6_usrreq.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
udp6_var.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00

README 

a note to committers about KAME tree
$FreeBSD$
KAME project


FreeBSD IPv6/IPsec tree is from KAMEproject (http://www.kame.net/).
To synchronize KAME tree and FreeBSD better today and in the future,
please understand the following:

- DO NOT MAKE COSTMETIC CHANGES.
  "Cosmetic changes" here includes tabify, untabify, removal of space at EOL,
  minor KNF items, and whatever adds more output lines on "diff freebsd kame".
  To make future synchronization easier. it is critical to preserve certain
  statements in the code.  Also, as KAME tree supports all 4 BSDs (Free, Open,
  Net, BSD/OS) in single shared tree, it is not always possible to backport
  FreeBSD changes into KAME tree.  So again, please do not make cosmetic
  changes.  Even if you think it a right thing, that will bite KAME guys badly
  during upgrade attempts, and prevent us from synchronizing two trees.
  (you don't usually make cosmetic changes against third-party code, do you?)

- REPORT CHANGES/BUGS TO KAME GUYS.
  It is not always possible for KAME guys to watch all the freebsd mailing
  list traffic, as the traffic is HUGE.  So if possible, please, inform
  kame guys of changes you made in IPv6/IPsec related portion.  Contact
  path would be snap-users@kame.net or KAME PR database on www.kame.net.
  (or to core@kame.net if it is necessary to make it confidential)

Thank you for your cooperation and have a happy IPv6 life!


Note: KAME-origin code is in the following locations.
The above notice applies to corresponding manpages too.
The list may not be complete.  If you see $KAME$ in the code, it is from
KAME distribution.  If you see some file that is IPv6/IPsec related, it is
highly possible that the file is from KAME distribution.

include/ifaddrs.h
lib/libc/net
lib/libc/net/getaddrinfo.c
lib/libc/net/getifaddrs.c
lib/libc/net/getnameinfo.c
lib/libc/net/ifname.c
lib/libc/net/ip6opt.c
lib/libc/net/map_v4v6.c
lib/libc/net/name6.c
lib/libftpio
lib/libipsec
sbin/ip6fw
sbin/ping6
sbin/rtsol
share/doc/IPv6
share/man/man4/ip6.4
share/man/man4/inet6.4
sys/crypto (except sys/crypto/rc4)
sys/kern/uipc_mbuf2.c
sys/net/if_faith.[ch]
sys/net/if_gif.[ch]
sys/net/if_stf.[ch]
sys/net/pfkeyv2.h
sys/netinet/icmp6.h
sys/netinet/in_gif.[ch]
sys/netinet/ip6.h
sys/netinet/ip_encap.[ch]
sys/netinet6
sys/netkey
usr.sbin/faithd
usr.sbin/gifconfig
usr.sbin/ifmcstat
usr.sbin/mld6query
usr.sbin/ndp
usr.sbin/pim6dd
usr.sbin/pim6sd
usr.sbin/prefix
usr.sbin/rip6query
usr.sbin/route6d
usr.sbin/rrenumd
usr.sbin/rtadvd
usr.sbin/rtsold
usr.sbin/scope6config
usr.sbin/setkey
usr.sbin/traceroute6