Commit Graph

88 Commits

Author SHA1 Message Date
thorpej d679590033 Split the pre-computed ifnet checksum flags into Tx and Rx directions.
Add capabilities bits that indicate an interface can only perform
in-bound TCPv4 or UDPv4 checksums.  There is at least one Gig-E chip
for which this is true (Level One LXT-1001), and this is also the
case for the Intel i82559 10/100 Ethernet chips.
2001-09-17 17:26:59 +00:00
yamt 5d1c2fff55 fix cksum error of udp and tcp packet with ip options 2001-08-11 12:26:50 +00:00
thorpej ad9d3794b0 Implement support for IP/TCP/UDP checksum offloading provided by
network interfaces.  This works by pre-computing the pseudo-header
checksum and caching it, delaying the actual checksum to ip_output()
if the hardware cannot perform the sum for us.  In-bound checksums
can either be fully-checked by hardware, or summed up for final
verification by software.  This method was modeled after how this
is done in FreeBSD, although the code is significantly different in
most places.

We don't delay checksums for IPv6/TCP, but we do take advantage of the
cached pseudo-header checksum.

Note: hardware-assisted checksumming defaults to "off".  It is
enabled with ifconfig(8).  See the manual page for details.

Implement hardware-assisted checksumming on the DP83820 Gigabit Ethernet,
3c90xB/3c90xC 10/100 Ethernet, and Alteon Tigon/Tigon2 Gigabit Ethernet.
2001-06-02 16:17:09 +00:00
ragge 474bc8ee6d Remove one #ifdef vax, bugfix another. Should probably be #ifdef i386 also. 2001-05-26 21:27:09 +00:00
thorpej bf2dcec4f5 Remove the use of splimp() from the NetBSD kernel. splnet()
and only splnet() is allowed for the protection of data structures
used by network devices.
2001-04-13 23:29:55 +00:00
itojun 5e57143c4a remove obsolete #if 0'ed section
(IPsec and DF bit interaction - the code was incorrect anyways)
2001-02-27 10:32:03 +00:00
itojun 617b3fab7e - record IPsec packet history into m_aux structure.
- let ipfilter look at wire-format packet only (not the decapsulated ones),
  so that VPN setting can work with NAT/ipfilter settings.
sync with kame.

TODO: use header history for stricter inbound validation
2001-01-24 09:04:15 +00:00
itojun 42bede79da allow IP_MULTICAST_IF and IP_ADD/DROP_MEMBERSHIP to specify interface
by interface index.  if the interface address specified is in 0.0.0.0/8
it will be considered as interface index in network byteorder.

getsockopt(IP_MULTICAST_IF) preserves old behavior if
setsockopt(IP_MULTICAST_IF) was done with interface address, and
returns interface index if setsockopt(IP_MULTICAST_IF) was done with
interface index (again using the form in 0.0.0.0/8).

Suggested by Dave Thaler, based on RIPv2 MIB spec (RFC1724 section 3.3).

http://mail-index.netbsd.org/tech-net/2001/01/13/0003.html
2001-01-13 07:19:33 +00:00
itojun 4a14fb4fd8 on getsockopt(IP_IPSEC_POLICY), make sure to initialize len 2001-01-13 06:01:18 +00:00
thorpej 8517807044 Actually, our local ip_off variable isn't needed. 2000-11-11 00:55:51 +00:00
thorpej 65fd25ea82 Restructure the PFIL_HOOKS mechanism a bit:
- All packets are passed to PFIL_HOOKS as they come off the wire, i.e.
  fields in protocol headers in network order, etc.
- Allow for multiple hooks to be registered, using a "key" and a "dlt".
  The "dlt" is a BPF data link type, indicating what type of header is
  present.
- INET and INET6 register with key == AF_INET or AF_INET6, and
  dlt == DLT_RAW.
- PFIL_HOOKS now take an argument for the filter hook, and mbuf **,
  an ifnet *, and a direction (PFIL_IN or PFIL_OUT), thus making them
  less IP (really, IP Filter) centric.

Maintain compatibility with IP Filter by adding wrapper functions for
IP Filter.
2000-11-11 00:52:36 +00:00
itojun 80db86454a fix IFA_STATS.
- use hashed in_ifaddr lookup.
- correct endianness.
2000-10-23 03:42:18 +00:00
thorpej d839a91f5f Add an IP_MTUDISC flag to the flags that can be passed to
ip_output().  This flag, if set, causes ip_output() to set
DF in the IP header if the MTU in the route is not locked.

This allows a bunch of redundant code, which I was never
really all that happy about adding in the first place, to
be eliminated.

Inspired by a similar change made by provos@openbsd.org when
he integrated NetBSD's Path MTU Discovery code into OpenBSD.
2000-10-17 02:57:01 +00:00
mrg 5ec6fd267b remove include of <vm/vm.h> 2000-06-28 02:59:32 +00:00
itojun 8a0fabf8cf add missing boundary checks to ip options processing.
correct timestamp option validation (len and ptr upper/lower bound
based on RFC791).
fill "pointer" field for parameter problem in timestamp option processing.
2000-05-10 03:31:30 +00:00
is ab879a6479 Copy M_BCAST and M_MCAST flags when fragmenting a packet (else
Multicast packets won't be send to the correct link layer address
by the interface driver).
By Artur Grabowski, PR 9772.
2000-04-13 11:48:07 +00:00
jdolecek c42f28d24a Since last duplicate prototype cleanup, we need to include
<netinet/ip_mroute.h> to get ip_mforward() prototype if MROUTING
is defined.
2000-03-31 14:31:03 +00:00
augustss 8529438fe6 Remove register declarations. 2000-03-30 12:51:13 +00:00
itojun 2dbc76c437 tabify a line. 2000-03-22 06:10:39 +00:00
itojun 04ac848d6f introduce m->m_pkthdr.aux to hold random data which needs to be passed
between protocol handlers.

ipsec socket pointers, ipsec decryption/auth information, tunnel
decapsulation information are in my mind - there can be several other usage.
at this moment, we use this for ipsec socket pointer passing.  this will
avoid reuse of m->m_pkthdr.rcvif in ipsec code.

due to the change, MHLEN will be decreased by sizeof(void *) - for example,
for i386, MHLEN was 100 bytes, but is now 96 bytes.
we may want to increase MSIZE from 128 to 256 for some of our architectures.

take caution if you use it for keeping some data item for long period
of time - use extra caution on M_PREPEND() or m_adj(), as they may result
in loss of m->m_pkthdr.aux pointer (and mbuf leak).

this will bump kernel version.

(as discussed in tech-net, tested in kame tree)
2000-03-01 12:49:27 +00:00
darrenr 4b3916780b pass "struct pfil_head *" to pfil_add_hook and pfil_remove hook rather
than "struct protosw *".
2000-02-20 00:56:33 +00:00
darrenr fd7edad6c3 Change the use of pfil hooks. There is no longer a single list of all
pfil information, instead, struct protosw now contains a structure
which caontains list heads, etc.  The per-protosw pfil struct is passed
to pfil_hook_get(), along with an in/out flag to get the head of the
relevant filter list.  This has been done for only IPv4 and IPv6, at
present, with these patches only enabling filtering for IPPROTO_IP and
IPPROTO_IPV6, although it is possible to have tcp/udp, etc, dedicated
filters now also.  The ipfilter code has been updated to only filter
IPv4 packets - next major release of ipfilter is required for ipv6.
2000-02-17 10:59:32 +00:00
itojun 1a2a1e2b1f bring in latest KAME ipsec tree.
- interop issues in ipcomp is fixed
- padding type (after ESP) is configurable
- key database memory management (need more fixes)
- policy specification is revisited

XXX m->m_pkthdr.rcvif is still overloaded - hope to fix it soon
2000-01-31 14:18:52 +00:00
itojun 8bd9534970 avoid shared cluster mbuf overwrite on multicast packet loopback.
(bsdi and freebsd fixed this a long time ago...)

PR: 9020
From: pavlin@catarina.usc.edu
1999-12-20 05:46:33 +00:00
is 43aa150a4e Handle packets to 255.255.255.255 like multicast packets. Fixes PR 7682 by
Darren Reed.
1999-12-13 17:04:11 +00:00
itojun ea861f0183 sync IPv6 part with latest KAME tree. IPsec part is left unmodified
due to massive changes in KAME side.
- IPv6 output goes through nd6_output
- faith can capture IPv4 packets as well - you can run IPv4-to-IPv6 translator
  using heavily modified DNS servers
- per-interface statistics (required for IPv6 MIB)
- interface autoconfig is revisited
- udp input handling has a big change for mapped address support.
- introduce in4_cksum() for non-overwriting checksumming
- introduce m_pulldown()
- neighbor discovery cleanups/improvements
- netinet/in.h strictly conforms to RFC2553 (no extra defs visible to userland)
- IFA_STATS is fixed a bit (not tested)
- and more more more.

TODO:
- cleanup os-independency #ifdef
- avoid rcvif dual use (for IPsec) to help ifdetach

(sorry for jumbo commit, I can't separate this any more...)
1999-12-13 15:17:17 +00:00
thorpej f9a7668b3f defopt IPSEC and IPSEC_ESP (both into opt_ipsec.h). 1999-07-09 22:57:15 +00:00
itojun 118d2b1d4f IPv6 kernel code, based on KAME/NetBSD 1.4, SNAP kit 19990628.
(Sorry for a big commit, I can't separate this into several pieces...)
Pls check sys/netinet6/TODO and sys/netinet6/IMPLEMENTATION for details.

- sys/kern: do not assume single mbuf, accept chained mbuf on passing
  data from userland to kernel (or other way round).
- "midway" ATM card: ATM PVC pseudo device support, like those done in ALTQ
  package (ftp://ftp.csl.sony.co.jp/pub/kjc/).
- sys/netinet/tcp*: IPv4/v6 dual stack tcp support.
- sys/netinet/{ip6,icmp6}.h, sys/net/pfkeyv2.h: IETF document assumes those
  file to be there so we patch it up.
- sys/netinet: IPsec additions are here and there.
- sys/netinet6/*: most of IPv6 code sits here.
- sys/netkey: IPsec key management code
- dev/pci/pcidevs: regen

In my understanding no code here is subject to export control so it
should be safe.
1999-07-01 08:12:45 +00:00
mrg 7185af78dc oops. move sendit: above the PFIL_HOOKS so that multicast traffic is filtered. from darren reed. 1999-06-07 01:26:04 +00:00
hwr 3fa094f8b5 Don't let packets with a Class-D source address escape the host.
Fixes second half of kern/7003 by Jonathan Stone <jonathan@DSG.Stanford.EDU>.
1999-05-04 19:50:23 +00:00
aidan da1b3a7abf Added per-addr input/output statistics. Currently just support netatalk
and netinet, currently only tested under netinet.

Disabled by default, enabled by compiling the kernel with option
IFA_STATS.  Enabling this feature seems to make the ip_output function
take 13% longer than before, which should be OK for people that need
this feature.
1999-03-27 01:24:49 +00:00
perry d446fb449c exterminate ovbcopy. patches provided by Erik Bertelsen, pr-7145 1999-03-12 22:42:30 +00:00
mycroft 231a906c71 There's just no plausible reason to byte-swap ip_id internally. It's opaque. 1999-01-19 23:39:56 +00:00
thorpej 555784ccd5 Fix byte order and ip_len inconsistencies in ICMP reply code. Also, fix
some formatting and HTONS(foo) vs. foo = htons(foo) inconsistencies.

PR #6602, Darren Reed.
1999-01-11 22:35:06 +00:00
thorpej 12632ebf71 Reverse the copyright-notice-swap. It went against existing practice. 1998-12-19 02:46:12 +00:00
ws ede30e2813 Fix a buglet when looking up an interface for multicast:
Zero out the routing structure before calling the route lookup code
in order to correctly match addresses.
1998-10-26 17:31:01 +00:00
matt 3ad026ac87 vax -> __vax__ (and mips to __mips__ in ultrix_misc.c) 1998-10-20 01:46:27 +00:00
tls c4730d65cf Switch order of TNF and UCB copyrights so UCB copyright is first; this seems more appropriate since UCB wrote the original code, after all. 1998-09-30 21:52:24 +00:00
mrg 4a75265273 defopt PFIL_HOOKS. 1998-08-09 08:58:18 +00:00
sommerfe 534520d815 Fix PR5508: ipfil cut-through forwarding causes panic 1998-07-17 00:28:00 +00:00
matt 5b43c678b7 Only transmit fragments if the send queue of interface can actually hold
all of the fragments.  Use the mtu of route in preference of the MTU of the
interface when doing fragmentation decisions.  (ie. Fragment to the path
mtu if it is available).
1998-04-28 15:26:00 +00:00
kml 96954c2a53 Ensure that we take the IP option length into account when we calculate
the effective maximum send size for TCP.  ip_optlen() and tcp_optlen()
should probably be inlined for efficiency.
1998-03-24 03:10:02 +00:00
mrg 45159fa631 convert pfil(9) in and out lists from <sys/queue.h> LISTs to TAILQs, and
change pfil_add_hook to put output filters at the tail of the queue,
while continuing to place input filters at the head of the queue.  update
the two users of these functions, and document these changes.

fixes PR#4593.
1998-03-19 15:45:30 +00:00
tls 91de585d5f Add correct copyright notice for IP address hash change. This code is donated to TNF by the original copyright holder, Panix. 1998-02-15 18:24:23 +00:00
tls c9934a9084 Change list of interface IP addresses to a hash. Improves performance on hosts with a large number of IP addresses significantly. 1998-02-13 18:21:38 +00:00
kleink a8bd1c7e84 Fix variable declarations: register -> register int. 1998-02-13 10:23:49 +00:00
scottr 54ea074777 Use option header file for MROUTING 1998-01-12 03:02:48 +00:00
lukem c80b4400e5 add the following, derived from FreeBSD:
* IP_PORTRANGE socket option, which controls how the ephemeral ports
  are allocated. it takes the following settings:
	IP_PORTRANGE_DEFAULT	use anonportmin (49152) -> anonportmax (65535)
	IP_PORTRANGE_HIGH	as IP_PORTRANGE_DEFAULT (retained for FreeBSD
				compat reasons, where these are separate)
	IP_PORTRANGE_LOW	use 600 -> 1023. only works if uid==0.
* in_pcb flag INP_ANONPORT. set if port was allocated ephmerally
1998-01-07 22:51:22 +00:00
matt 8c42ff649b Add support for returning maximum supported MTU when ip_output fails with
EMSGSIZE.
1997-10-14 00:52:39 +00:00
christos 0659cacda6 Move the mtod calls *after* we've made sure that the packet has passed the
filter successfully. Otherwise it can be NULL if the filter blocked it,
and we die. How did this ever work?
1997-04-15 00:41:52 +00:00