mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-14 10:09:48 +00:00
6f8aee2268
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. :) |
||
|---|---|---|
| .. | ||
| 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 | ||
| icmp6.h | ||
| in6_cksum.c | ||
| in6_gif.c | ||
| in6_gif.h | ||
| in6_ifattach.c | ||
| in6_ifattach.h | ||
| in6_pcb.c | ||
| in6_pcb.h | ||
| in6_prefix.c | ||
| in6_prefix.h | ||
| in6_proto.c | ||
| in6_rmx.c | ||
| in6_src.c | ||
| in6_var.h | ||
| in6.c | ||
| in6.h | ||
| ip6_ecn.h | ||
| ip6_forward.c | ||
| ip6_fw.c | ||
| ip6_fw.h | ||
| ip6_id.c | ||
| ip6_input.c | ||
| ip6_mroute.c | ||
| ip6_mroute.h | ||
| ip6_output.c | ||
| ip6_var.h | ||
| ip6.h | ||
| ip6protosw.h | ||
| ipcomp6.h | ||
| ipcomp_core.c | ||
| ipcomp_input.c | ||
| ipcomp_output.c | ||
| ipcomp.h | ||
| ipsec6.h | ||
| ipsec.c | ||
| ipsec.h | ||
| mld6_var.h | ||
| mld6.c | ||
| nd6_nbr.c | ||
| nd6_rtr.c | ||
| nd6.c | ||
| nd6.h | ||
| pim6_var.h | ||
| pim6.h | ||
| raw_ip6.c | ||
| raw_ip6.h | ||
| README | ||
| route6.c | ||
| scope6_var.h | ||
| scope6.c | ||
| tcp6_var.h | ||
| udp6_output.c | ||
| udp6_usrreq.c | ||
| udp6_var.h | ||
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