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* Fix packet flow when both ng_ether(4) and bridge(4) are in use:Gleb Smirnoff2004-10-121-4/+29
| | | | | | | | | | | | | | | | | | - push all bridge logic from if_ethersubr.c into bridge.c make bridge_in() return mbuf pointer (or NULL). - call only bridge_in() from ether_input(), after ng_ether_input() was optinally called. - call bridge_in() from ng_ether_rcv_upper(). Long description: http://lists.freebsd.org/mailman/htdig/freebsd-net/2004-May/003881.html Reported by: Jian-Wei Wang <jwwang at FreeBSD.csie.NCTU.edu.tw> Tested by: myself, Sergey Lyubka Reviewed by: sam Approved by: julian (mentor) MFC after: 2 months Notes: svn path=/head/; revision=136428
* Add an additional struct inpcb * argument to pfil(9) in order to enableMax Laier2004-09-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet) Notes: svn path=/head/; revision=135920
* Always compile PFIL_HOOKS into the kernel and remove the associated kernelAndre Oppermann2004-08-271-9/+1
| | | | | | | | | | | | | | compile option. All FreeBSD packet filters now use the PFIL_HOOKS API and thus it becomes a standard part of the network stack. If no hooks are connected the entire packet filter hooks section and related activities are jumped over. This removes any performance impact if no hooks are active. Both OpenBSD and DragonFlyBSD have integrated PFIL_HOOKS permanently as well. Notes: svn path=/head/; revision=134383
* Convert ipfw to use PFIL_HOOKS. This is change is transparent to userlandAndre Oppermann2004-08-171-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and preserves the ipfw ABI. The ipfw core packet inspection and filtering functions have not been changed, only how ipfw is invoked is different. However there are many changes how ipfw is and its add-on's are handled: In general ipfw is now called through the PFIL_HOOKS and most associated magic, that was in ip_input() or ip_output() previously, is now done in ipfw_check_[in|out]() in the ipfw PFIL handler. IPDIVERT is entirely handled within the ipfw PFIL handlers. A packet to be diverted is checked if it is fragmented, if yes, ip_reass() gets in for reassembly. If not, or all fragments arrived and the packet is complete, divert_packet is called directly. For 'tee' no reassembly attempt is made and a copy of the packet is sent to the divert socket unmodified. The original packet continues its way through ip_input/output(). ipfw 'forward' is done via m_tag's. The ipfw PFIL handlers tag the packet with the new destination sockaddr_in. A check if the new destination is a local IP address is made and the m_flags are set appropriately. ip_input() and ip_output() have some more work to do here. For ip_input() the m_flags are checked and a packet for us is directly sent to the 'ours' section for further processing. Destination changes on the input path are only tagged and the 'srcrt' flag to ip_forward() is set to disable destination checks and ICMP replies at this stage. The tag is going to be handled on output. ip_output() again checks for m_flags and the 'ours' tag. If found, the packet will be dropped back to the IP netisr where it is going to be picked up by ip_input() again and the directly sent to the 'ours' section. When only the destination changes, the route's 'dst' is overwritten with the new destination from the forward m_tag. Then it jumps back at the route lookup again and skips the firewall check because it has been marked with M_SKIP_FIREWALL. ipfw 'forward' has to be compiled into the kernel with 'option IPFIREWALL_FORWARD' to enable it. DUMMYNET is entirely handled within the ipfw PFIL handlers. A packet for a dummynet pipe or queue is directly sent to dummynet_io(). Dummynet will then inject it back into ip_input/ip_output() after it has served its time. Dummynet packets are tagged and will continue from the next rule when they hit the ipfw PFIL handlers again after re-injection. BRIDGING and IPFW_ETHER are not changed yet and use ipfw_chk() directly as they did before. Later this will be changed to dedicated ETHER PFIL_HOOKS. More detailed changes to the code: conf/files Add netinet/ip_fw_pfil.c. conf/options Add IPFIREWALL_FORWARD option. modules/ipfw/Makefile Add ip_fw_pfil.c. net/bridge.c Disable PFIL_HOOKS if ipfw for bridging is active. Bridging ipfw is still directly invoked to handle layer2 headers and packets would get a double ipfw when run through PFIL_HOOKS as well. netinet/ip_divert.c Removed divert_clone() function. It is no longer used. netinet/ip_dummynet.[ch] Neither the route 'ro' nor the destination 'dst' need to be stored while in dummynet transit. Structure members and associated macros are removed. netinet/ip_fastfwd.c Removed all direct ipfw handling code and replace it with the new 'ipfw forward' handling code. netinet/ip_fw.h Removed 'ro' and 'dst' from struct ip_fw_args. netinet/ip_fw2.c (Re)moved some global variables and the module handling. netinet/ip_fw_pfil.c New file containing the ipfw PFIL handlers and module initialization. netinet/ip_input.c Removed all direct ipfw handling code and replace it with the new 'ipfw forward' handling code. ip_forward() does not longer require the 'next_hop' struct sockaddr_in argument. Disable early checks if 'srcrt' is set. netinet/ip_output.c Removed all direct ipfw handling code and replace it with the new 'ipfw forward' handling code. netinet/ip_var.h Add ip_reass() as general function. (Used from ipfw PFIL handlers for IPDIVERT.) netinet/raw_ip.c Directly check if ipfw and dummynet control pointers are active. netinet/tcp_input.c Rework the 'ipfw forward' to local code to work with the new way of forward tags. netinet/tcp_sack.c Remove include 'opt_ipfw.h' which is not needed here. sys/mbuf.h Remove m_claim_next() macro which was exclusively for ipfw 'forward' and is no longer needed. Approved by: re (scottl) Notes: svn path=/head/; revision=133920
* In the BPF and ethernet bridging code, don't allow callouts to executeRobert Watson2004-07-051-1/+1
| | | | | | | without Giant if we're not debug.mpsafenet=1. Notes: svn path=/head/; revision=131630
* The net.link.ether.bridge.enable sysctl MIB variable enables bridgeBruce M Simpson2004-07-041-0/+1
| | | | | | | | | | | | | functionality by setting to a non-zero value. This is an integer, but is treated as a boolean by the code, so clamp it to a boolean value when set so as to avoid unnecessary bridge reinitialization if it's changed to another value. PR: kern/61174 Requested by: Bruce Cran Notes: svn path=/head/; revision=131571
* Replace IF_HANDOFF with new IFQ_HANDOFF to enqueue with ALTQ once enabled onMax Laier2004-06-151-2/+5
| | | | | | | the respective drivers. Notes: svn path=/head/; revision=130549
* add missing #include <sys/module.h>Poul-Henning Kamp2004-05-301-0/+1
| | | | Notes: svn path=/head/; revision=129880
* arpcom untangling:Luigi Rizzo2004-04-241-5/+6
| | | | | | | do not use struct arpcom directly, rather use IFP2AC(ifp). Notes: svn path=/head/; revision=128617
* Re-remove MT_TAGs. The problems with dummynet have been fixed now.Max Laier2004-02-251-9/+4
| | | | | | | | Tested by: -current, bms(mentor), me Approved by: bms(mentor), sam Notes: svn path=/head/; revision=126239
* Backout MT_TAG removal (i.e. bring back MT_TAGs) for now, as dummynet isMax Laier2004-02-181-5/+9
| | | | | | | | | not working properly with the patch in place. Approved by: bms(mentor) Notes: svn path=/head/; revision=125952
* This set of changes eliminates the use of MT_TAG "pseudo mbufs", replacingMax Laier2004-02-131-9/+5
| | | | | | | | | | | | | | them mostly with packet tags (one case is handled by using an mbuf flag since the linkage between "caller" and "callee" is direct and there's no need to incur the overhead of a packet tag). This is (mostly) work from: sam Silence from: -arch Approved by: bms(mentor), sam, rwatson Notes: svn path=/head/; revision=125784
* correct bridge_version: replace unexpanded RCS keywords by a fixed stringSam Leffler2003-12-241-1/+1
| | | | | | | PR: kern/60251 Notes: svn path=/head/; revision=123808
* Replace the if_name and if_unit members of struct ifnet with new membersBrooks Davis2003-10-311-21/+17
| | | | | | | | | | | | | | | | if_xname, if_dname, and if_dunit. if_xname is the name of the interface and if_dname/unit are the driver name and instance. This change paves the way for interface renaming and enhanced pseudo device creation and configuration symantics. Approved By: re (in principle) Reviewed By: njl, imp Tested On: i386, amd64, sparc64 Obtained From: NetBSD (if_xname) Notes: svn path=/head/; revision=121816
* Correct pfil_run_hooks return handling: if the return value is non-zeroSam Leffler2003-09-301-5/+3
| | | | | | | | | | | | then the mbuf has been consumed by a hook; otherwise beware of a null mbuf return (gack). In particular the bridge was doing the wrong thing. While in the ipv6 code make it's handling of pfil_run_hooks identical to netbsd. Pointed out by: Pyun YongHyeon <yongari@kt-is.co.kr> Notes: svn path=/head/; revision=120593
* o update PFIL_HOOKS support to current API used by netbsdSam Leffler2003-09-231-23/+19
| | | | | | | | | | | | | | o revamp IPv4+IPv6+bridge usage to match API changes o remove pfil_head instances from protosw entries (no longer used) o add locking o bump FreeBSD version for 3rd party modules Heavy lifting by: "Max Laier" <max@love2party.net> Supported by: FreeBSD Foundation Obtained from: NetBSD (bits of pfil.h and pfil.c) Notes: svn path=/head/; revision=120386
* fix build on 64-bit platformsSam Leffler2003-09-171-1/+1
| | | | Notes: svn path=/head/; revision=120177
* Minor overhaul and add locking.Sam Leffler2003-09-171-305/+409
| | | | | | | | | | | | | | | | | | o replace magic constants with #defines (e.g. ETHER_ADDR_LEN) o move mib variables to net.link.ether.bridge with backwards compatible entries for well-known items maintained under BURN_BRIDGES o revamp debugging support so it is conditioanlly compiled with BRIDGE_DEBUG (on currently) and runtime controlled by net.link.ether.bridge.debug o change timeout to MPSAFE callout o optimize lookup for common case of two interfaces o optimize forwarding path to take IFNET lock only when needed o make boot-time printf dependent on bootverbose o sundry style changes (ANSI decls, extraneous spaces, etc.) Sponsored by: FreeBSD Foundation Notes: svn path=/head/; revision=120139
* Back out M_* changes, per decision of the TRB.Warner Losh2003-02-191-6/+6
| | | | | | | Approved by: trb Notes: svn path=/head/; revision=111119
* Do not do an assignment in a truth test (previous commit) or gcc gives aPeter Wemm2003-02-121-1/+1
| | | | | | | | | | | | warning which breaks builds. cc1: warnings being treated as errors src/sys/net/bridge.c: In function `bdg_forward': sys/net/bridge.c:931: warning: suggest parentheses around assignment used as truth value *** Error code 1 Notes: svn path=/head/; revision=110768
* PFIL_HOOKS optimization: check if at least one hook is present beforeSam Leffler2003-02-111-2/+3
| | | | | | | munging the IP header to pass to the hooks Notes: svn path=/head/; revision=110733
* Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.Alfred Perlstein2003-01-211-6/+6
| | | | | | | Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT. Notes: svn path=/head/; revision=109623
* Oops, I misread the purpose of the NULL check in EH_RESTORE() inIan Dowse2002-12-271-2/+3
| | | | | | | | | | | revision 1.62. It was checking for M_PREPEND() failing, not for the case of a NULL mbuf pointer being supplied to the macro. Back out that revision, and fix the NULL dereference by not calling EH_RESTORE() in the case where the mbuf pointer is NULL because the firewall rejected the packet. Notes: svn path=/head/; revision=108326
* Fix a bug introduced by revision 1.59 that would cause an immediateIan Dowse2002-12-271-1/+1
| | | | | | | NULL dereference if a bridged packet was rejected by ipfw. Notes: svn path=/head/; revision=108319
* SMP locking for ifnet list.Jeffrey Hsu2002-12-221-10/+22
| | | | Notes: svn path=/head/; revision=108172
* o Untangle the confusion with the malloc flags {M_WAITOK, M_NOWAIT} andBosko Milekic2002-12-191-2/+2
| | | | | | | | | | | | | the mbuf allocator flags {M_TRYWAIT, M_DONTWAIT}. o Fix a bpf_compat issue where malloc() was defined to just call bpf_alloc() and pass the 'canwait' flag(s) along. It's been changed to call bpf_alloc() but pass the corresponding M_TRYWAIT or M_DONTWAIT flag (and only one of those two). Submitted by: Hiten Pandya <hiten@unixdaemons.com> (hiten->commit_count++) Notes: svn path=/head/; revision=108107
* track changes to ethernet input handling to no longer strip the Ethernet headerSam Leffler2002-11-141-48/+55
| | | | | | | | Reviewed by: many Approved by: re Notes: svn path=/head/; revision=106938
* FIx misindentation.Poul-Henning Kamp2002-10-161-10/+10
| | | | | | | Spotted by: FlexeLint. Notes: svn path=/head/; revision=105217
* Replace aux mbufs with packet tags:Sam Leffler2002-10-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | o instead of a list of mbufs use a list of m_tag structures a la openbsd o for netgraph et. al. extend the stock openbsd m_tag to include a 32-bit ABI/module number cookie o for openbsd compatibility define a well-known cookie MTAG_ABI_COMPAT and use this in defining openbsd-compatible m_tag_find and m_tag_get routines o rewrite KAME use of aux mbufs in terms of packet tags o eliminate the most heavily used aux mbufs by adding an additional struct inpcb parameter to ip_output and ip6_output to allow the IPsec code to locate the security policy to apply to outbound packets o bump __FreeBSD_version so code can be conditionalized o fixup ipfilter's call to ip_output based on __FreeBSD_version Reviewed by: julian, luigi (silent), -arch, -net, darren Approved by: julian, silence from everyone else Obtained from: openbsd (mostly) MFC after: 1 month Notes: svn path=/head/; revision=105194
* When reusing a pointer as a number, at least cast itMaxime Henrion2002-10-061-1/+1
| | | | | | | | to uintptr_t rather than u_int to avoid warnings on 64 bits architectures. Notes: svn path=/head/; revision=104570
* Make bridging and layer2-ipfw obey net.inet.ip.fw.one_pass.Luigi Rizzo2002-09-121-2/+2
| | | | | | | | | | | | | | | I should have committed this ages ago. The MFC for if_ethersubr.c could be done in the usual few days (only ipfw2 uses it), the one for bridge.c should probably wait until after 4.7 because it changes an existing though mostly undocumented behaviour (on which i hope nobody relies). All in all, i'll wait for both things unless there is demand. MFC after: 35 days Notes: svn path=/head/; revision=103242
* Remove 0 initializers for global/static variables, so they end up inLuigi Rizzo2002-07-071-4/+4
| | | | | | | | BSS instead of DATA. This marginally reduces the kernel image size, though the difference is almost irrelevant for compressed kernels. Notes: svn path=/head/; revision=99555
* Remove trailing whitespaces.Maxim Konovalov2002-07-031-2/+2
| | | | | | | Approved by: luigi Notes: svn path=/head/; revision=99340
* o Strict interface names comparison. The old code assumed "fxp1" == "fxp11".Maxim Konovalov2002-07-031-3/+3
| | | | | | | | | | | o Use an appropriate constant for interface name buffer. Reviewed by: luigi Approved by: luigi MFC after: 1 month Notes: svn path=/head/; revision=99339
* fix indentation, whitespace and a few comments.Luigi Rizzo2002-06-231-3/+3
| | | | Notes: svn path=/head/; revision=98669
* Remove (almost all) global variables that were used to holdLuigi Rizzo2002-06-221-35/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | packet forwarding state ("annotations") during ip processing. The code is considerably cleaner now. The variables removed by this change are: ip_divert_cookie used by divert sockets ip_fw_fwd_addr used for transparent ip redirection last_pkt used by dynamic pipes in dummynet Removal of the first two has been done by carrying the annotations into volatile structs prepended to the mbuf chains, and adding appropriate code to add/remove annotations in the routines which make use of them, i.e. ip_input(), ip_output(), tcp_input(), bdg_forward(), ether_demux(), ether_output_frame(), div_output(). On passing, remove a bug in divert handling of fragmented packet. Now it is the fragment at offset 0 which sets the divert status of the whole packet, whereas formerly it was the last incoming fragment to decide. Removal of last_pkt required a change in the interface of ip_fw_chk() and dummynet_io(). On passing, use the same mechanism for dummynet annotations and for divert/forward annotations. option IPFIREWALL_FORWARD is effectively useless, the code to implement it is very small and is now in by default to avoid the obfuscation of conditionally compiled code. NOTES: * there is at least one global variable left, sro_fwd, in ip_output(). I am not sure if/how this can be removed. * I have deliberately avoided gratuitous style changes in this commit to avoid cluttering the diffs. Minor stule cleanup will likely be necessary * this commit only focused on the IP layer. I am sure there is a number of global variables used in the TCP and maybe UDP stack. * despite the number of files touched, there are absolutely no API's or data structures changed by this commit (except the interfaces of ip_fw_chk() and dummynet_io(), which are internal anyways), so an MFC is quite safe and unintrusive (and desirable, given the improved readability of the code). MFC after: 10 days Notes: svn path=/head/; revision=98613
* Cleanup the interface to ip_fw_chk, two of the input argumentsLuigi Rizzo2002-05-091-36/+34
| | | | | | | | | | | | | | | | | | were totally useless and have been removed. ip_input.c, ip_output.c: Properly initialize the "ip" pointer in case the firewall does an m_pullup() on the packet. Remove some debugging code forgotten long ago. ip_fw.[ch], bridge.c: Prepare the grounds for matching MAC header fields in bridged packets, so we can have 'etherfw' functionality without a lot of kernel and userland bloat. Notes: svn path=/head/; revision=96245
* Add hooks for very basic IPFilter support in bridging. Set,Crist J. Clark2002-03-181-5/+42
| | | | | | | | | | | | | | | | # sysctl net.link.ether.bdg_ipf=1 To enable. Just like ipfw(8) bridging, only input packets are filtered in the bridge. Filtering works just like in the IP layer, ipf(8) first, then ipfw(8). And just like in the IP layer, both are independent, one need not be run to use the other. (Note: This will not work in, but doesn't break, the bridge.ko module. The ipl.ko module would need to be fixed before that is worth worrying about.) Reviewed by: luigi Notes: svn path=/head/; revision=92522
* Unbreak bridge.ko. Replace an unresolved symbol with the actions itCrist J. Clark2002-03-051-1/+3
| | | | | | | | | | | was meant to take. Submitted by: luigi Approved by: luigi MFC after: 3 days Notes: svn path=/head/; revision=91650
* o Move NTOHL() and associated macros into <sys/param.h>. These areMike Barcroft2002-02-181-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | deprecated in favor of the POSIX-defined lowercase variants. o Change all occurrences of NTOHL() and associated marcros in the source tree to use the lowercase function variants. o Add missing license bits to sparc64's <machine/endian.h>. Approved by: jake o Clean up <machine/endian.h> files. o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>. o Remove prototypes for non-existent bswapXX() functions. o Include <machine/endian.h> in <arpa/inet.h> to define the POSIX-required ntohl() family of functions. o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>, and <sys/param.h>. o Prepend underscores to the ntohl() family to help deal with complexities associated with having MD (asm and inline) versions, and having to prevent exposure of these functions in other headers that happen to make use of endian-specific defines. o Create weak aliases to the canonical function name to help deal with third-party software forgetting to include an appropriate header. o Remove some now unneeded pollution from <sys/types.h>. o Add missing <arpa/inet.h> includes in userland. Tested on: alpha, i386 Reviewed by: bde, jake, tmm Notes: svn path=/head/; revision=90868
* Lots of improvement to the bridging code.Luigi Rizzo2002-02-151-242/+378
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order of importance: + each cluster now uses private data structures (filtering and local address tables) so you can treat them as fully independent switches. This part of the work was supported by: Cisco Systems, Inc. - NSITE lab, RTP, NC. + cleaned up the handling of configuration, so the system will behave much better when real or pseudo devices are dynamically attached or detached. It should also not panic anymore on systems with large number of devices, closing a few existings PRs on the topic. + while at it, add support for VLAN. This means that a FreeBSD box can now work as a real VLAN switch, with trunk interfaces etc. As an example: ifconfig vlan0 vlan 3 vlandev dc0 ifconfig vlan1 vlan 4 vlandev dc0 net.link.ether.bridge_cfg="vlan0:3,dc1:3,vlan1:4,dc1:4" uses dc0 as a trunk interface, and dc1 and dc3 as ports on vlans 3 and 4 You get the idea... NOTA BENE: by default bridge_cfg is initialised to "" so even if you enable bridging, no packets will be bridged until you set the list of interfaces on which you want this to happen. + large restructuring of the code, moving private vars and types from bridge.h to bridge.c. + added a lot of comments to the code to explain how to use it. Notes: svn path=/head/; revision=90678
* Whitespace change - replace leading spaces with tabs.Luigi Rizzo2001-11-241-6/+6
| | | | Notes: svn path=/head/; revision=86843
* MFS: sync the ipfw/dummynet/bridge code with the one recently mergedLuigi Rizzo2001-11-041-88/+173
| | | | | | | into stable (mostly , but not only, formatting and comments changes). Notes: svn path=/head/; revision=86047
* Remove an extra splimp() call.Luigi Rizzo2001-11-011-1/+0
| | | | | | | Spotted-by: diff(1) Notes: svn path=/head/; revision=85812
* Fix this so it compiles cleanly for alpha. Tried to do some minimal testing.Matt Jacob2001-10-191-8/+8
| | | | | | | Reviewed by: freebsd-net Notes: svn path=/head/; revision=85181
* Traverse the list of network interfaces rather than use if_index- if_index isMatt Jacob2001-10-121-3/+1
| | | | | | | not guaranteed to be dense with respect to the actual list of interfaces. Notes: svn path=/head/; revision=84853
* Make it so dummynet and bridge can be loaded as modules.Paul Saab2001-10-051-27/+55
| | | | | | | Submitted by: billf Notes: svn path=/head/; revision=84516
* Two main changes here:Luigi Rizzo2001-09-271-2/+2
| | | | | | | | | | | | | | | | | | + implement "limit" rules, which permit to limit the number of sessions between certain host pairs (according to masks). These are a special type of stateful rules, which might be of interest in some cases. See the ipfw manpage for details. + merge the list pointers and ipfw rule descriptors in the kernel, so the code is smaller, faster and more readable. This patch basically consists in replacing "foo->rule->bar" with "rule->bar" all over the place. I have been willing to do this for ages! MFC after: 1 week Notes: svn path=/head/; revision=84058
* Remove unused variablePeter Wemm2001-06-151-1/+0
| | | | Notes: svn path=/head/; revision=78248
* Sync with the bridge/dummynet/ipfw code already tested in stable.Luigi Rizzo2001-02-101-67/+60
| | | | | | | | In ip_fw.[ch] change a couple of variable and field names to avoid having types, variables and fields with the same name. Notes: svn path=/head/; revision=72270
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