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hook up looking up routes in alternate tables to the packet forwarding path.
alternate routing tables are mintained with route(8), table selection via pf.
mostly hacked on a train ride with ryan some time ago, ok mcbride claudio
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when set on raw or udp sockets, userland receives the incoming packet's TTL
as ancillary data (cmsg shitz). modeled after the FreeBSD implementation.
ok claudio djm deraadt
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To minimise path disruptions, this implements recommendations made in RFC2992 -
the hash-threshold mechanism to select paths based on source/destination IP
address pairs, and inserts multipath routes in the middle of the route table.
To enable multipath distribution, use:
sysctl net.inet.ip.multipath=1
and/or:
sysctl net.inet6.ip6.multipath=1
testing norby@
ok claudio@ henning@ hshoexer@
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parameter so they can work on alternate tables. table 0 hardcoded for
many callers yet, that will be adapted step by step.
input + ok claudio norby hshoexer
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henning@ claudio@ ok
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Additionally add the IP_RECVIF option which returns the interface a packet
was received on. OK markus@ norby@
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the remainder of the network stack from splimp to splnet.
ok miod@
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Any pf(4) translation that modifies more than IP addresses,
was happening on the shared mbuf cluster. Thus we were
sending icmp errors with corrupted payload.
OK dhartmei@, markus@
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ok henning@
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It is now possible to enable multicast routing in the kernel with
the sysctl option net.inet.ip.mforwarding=1
Based on intial work by msf@
help claudio@
ok claudio@ deraadt@
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found by leonardo@iken.com.br
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Don't count link local scope multicast as not forwardable.
This stops ips_cantforward growing on carp(4) networks.
tested and ok mcbride@, ok markus@.
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than a pointer to struct ifnet containing it.
Saves a 448 byte stack allocation in ip_forward which previously faked up
a struct ifnet just for this purpose.
idea ok deraadt millert
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millert
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from art; ok deraadt, claudio, henning
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ok henning
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ok krw@ canacar@
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Wait with the decrement until after the copy is done. Resolves checksum
mismatches on the embedded header, as reported by tcpdump.
ok markus@ itojun@
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ok markus@
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ok mcbride@ miod@ deraadt@
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No need to reconfig kernel or rebuild userland stuff.
requested deraadt@, help beck@
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ok cedric@ henning@
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their *source* IP address in addition to their destination address.
routing table "destination" now contains a "struct sockaddr_rtin"
for IPv4 instead of a "struct sockaddr_in".
the routing socket has been extended in a backward-compatible way.
todo: PMTU enhancements, IPv6. ok deraadt@ mcbride@
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from Patrick Latifi
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(please test, especially PF portion)
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rescinded 22 July 1999. Proofed by myself and Theo.
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ok dhartmei@
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ok henning@, deraadt@
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Henric Jungheim. ok deraadt@
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NULL to full 64 bits on a 64 bit address system. Soultion is to add a
(void *) cast before NULL. This makes a 64 bit MIPS kernel work and will
probably help future 64 bit ports as well.
OK from art@
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declarations (extern int foo), and compensate in the appropriate locations.
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it consists of
- ECN support in TCP
- tunnel-egress and fragment reassembly rules in layer-3 not to lose
congestion info at tunnel-egress and fragment reassembly
to enable ECN in TCP, build a kernel with TCP_ECN, and then,
turn it on by "sysctl -w net.inet.tcp.ecn=1".
ok deraadt@
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1. When a pool hit the hard limit. Just before bailing out/sleeping.
2. When an allocator fails to allocate memory (with PR_NOWAIT).
3. Just before trying to reclaim some page in pool_reclaim.
The function called form the hook should try to free some items to the
pool if possible.
Convert m_reclaim hooks that were embedded in MCLGET, MGET and MGETHDR
into a pool drain hook (making the code much cleaner).
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well (not at all) with shortages of the vm_map where the pages are mapped
(usually kmem_map).
Try to deal with it:
- group all information the backend allocator for a pool in a separate
struct. The pool will only have a pointer to that struct.
- change the pool_init API to reflect that.
- link all pools allocating from the same allocator on a linked list.
- Since an allocator is responsible to wait for physical memory it will
only fail (waitok) when it runs out of its backing vm_map, carefully
drain pools using the same allocator so that va space is freed.
(see comments in code for caveats and details).
- change pool_reclaim to return if it actually succeeded to free some
memory, use that information to make draining easier and more efficient.
- get rid of PR_URGENT, noone uses it.
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