- pass the alignment instead of the mask (as Roy asked and to match the
other macro)
- use alignof to determine that alignment and CTASSERT what we expect
- remove unused macros

- centralize header align and pullup into a single inline function
- use a single macro to align pointers and expose the alignment, instead
of hard-coding 3 in 1/2 the macros.
- fix an issue in the ipv6 lt2p where it was aligning for ipv4 and pulling
for ipv6.

Use non-variadic function pointer in protosw::pr_input.

branches: 1.24.26; 1.24.28;
Make IGMP and multicast group management code MP-safe. Use a read-write
lock to protect the hash table of multicast address records; also, make it
private and eliminate some macros. In the long term, the lookup path ought
to be optimised.

branches: 1.23.48; 1.23.64;
Make IGMP stats per-cpu.

branches: 1.22.70;
Multiple inclusion protection, as suggested by christos@ on tech-kern@
few days ago.

branches: 1.21.12;
Initialise (most) pools from a link set instead of explicit calls
to pool_init. Untouched pools are ones that either in arch-specific
code, or aren't initialiased during initial system startup.

Convert struct session, ucred and lockf to pools.

no space between function name and paren: foo (blah) -> foo(blah)

De __P()

There is also no reason to use arc4random() here.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.16.2;
purge rti structure (in igmp.c) for removed ifp on if_detach().

Change the way multicasts are kept. They now use a hash table in the same
manner as the ifaddr hash table. By doing this, the mkludge code can go
away. At the same time, keep track of what pcbs are using what ifaddr and
when an address is deleted from an interface, notify/abort all sockets
that have that address as a source. Switch IGMP and multicasts to use pools
for allocation. Fix a number of potential problems in the igmp code where
allocation failures could cause a trap/panic.

Changes to allow the IPv4 and IPv6 layers to align headers themseves,
as necessary:
* Implement a new mbuf utility routine, m_copyup(), is is like
m_pullup(), except that it always prepends and copies, rather
than only doing so if the desired length is larger than m->m_len.
m_copyup() also allows an offset into the destination mbuf, which
allows space for packet headers, in the forwarding case.
* Add *_HDR_ALIGNED_P() macros for IP, IPv6, ICMP, and IGMP. These
macros expand to 1 if __NO_STRICT_ALIGNMENT is defined, so that
architectures which do not have strict alignment constraints don't
pay for the test or visit the new align-if-needed path.
* Use the new macros to check if a header needs to be aligned, or to
assert that it already is, as appropriate.

Note: This code is still somewhat experimental. However, the new
code path won't be visited if individual device drivers continue
to guarantee that packets are delivered to layer 3 already properly
aligned (which are rules that are already in use).

use arc4random

branches: 1.12.2; 1.12.4;
Eliminate commons.

branches: 1.11.4; 1.11.6; 1.11.8;
Update protocoles and interfaces stats counters to 64bit.
RTM_IFINFO is now 0xf, 0xe is RTM_OIFINFO which returns the old (if_msghdr14)
struct with 32bit counters (binary compat, conditioned on COMPAT_14).
Same for sysctl: node 3 is renamed NET_RT_OIFLIST, NET_RT_IFLIST is now node 4.
Change rt_msg1() to add an mbuf to the mbuf chain instead of just panic()
when the message is larger than MHLEN.

branches: 1.10.14; 1.10.20;
add/cleanup multiple inclusion protection.

netinet prototypes

Implement IGMP v2. Based on the Multicast 3.5 distribution.

KERNEL -> _KERNEL

New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Change the counters to be all the same type -- u_long.

Prototype the rest.

Fix some inconsistent spacing; spaces at the end of lines, etc.

branches: 1.1.1;
multicast support.
>From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.

- centralize header align and pullup into a single inline function
- use a single macro to align pointers and expose the alignment, instead
of hard-coding 3 in 1/2 the macros.
- fix an issue in the ipv6 lt2p where it was aligning for ipv4 and pulling
for ipv6.

Use non-variadic function pointer in protosw::pr_input.

branches: 1.24.26; 1.24.28;
Make IGMP and multicast group management code MP-safe. Use a read-write
lock to protect the hash table of multicast address records; also, make it
private and eliminate some macros. In the long term, the lookup path ought
to be optimised.

branches: 1.23.48; 1.23.64;
Make IGMP stats per-cpu.

branches: 1.22.70;
Multiple inclusion protection, as suggested by christos@ on tech-kern@
few days ago.

branches: 1.21.12;
Initialise (most) pools from a link set instead of explicit calls
to pool_init. Untouched pools are ones that either in arch-specific
code, or aren't initialiased during initial system startup.

Convert struct session, ucred and lockf to pools.

no space between function name and paren: foo (blah) -> foo(blah)

De __P()

There is also no reason to use arc4random() here.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.16.2;
purge rti structure (in igmp.c) for removed ifp on if_detach().

Change the way multicasts are kept. They now use a hash table in the same
manner as the ifaddr hash table. By doing this, the mkludge code can go
away. At the same time, keep track of what pcbs are using what ifaddr and
when an address is deleted from an interface, notify/abort all sockets
that have that address as a source. Switch IGMP and multicasts to use pools
for allocation. Fix a number of potential problems in the igmp code where
allocation failures could cause a trap/panic.

Changes to allow the IPv4 and IPv6 layers to align headers themseves,
as necessary:
* Implement a new mbuf utility routine, m_copyup(), is is like
m_pullup(), except that it always prepends and copies, rather
than only doing so if the desired length is larger than m->m_len.
m_copyup() also allows an offset into the destination mbuf, which
allows space for packet headers, in the forwarding case.
* Add *_HDR_ALIGNED_P() macros for IP, IPv6, ICMP, and IGMP. These
macros expand to 1 if __NO_STRICT_ALIGNMENT is defined, so that
architectures which do not have strict alignment constraints don't
pay for the test or visit the new align-if-needed path.
* Use the new macros to check if a header needs to be aligned, or to
assert that it already is, as appropriate.

Note: This code is still somewhat experimental. However, the new
code path won't be visited if individual device drivers continue
to guarantee that packets are delivered to layer 3 already properly
aligned (which are rules that are already in use).

use arc4random

branches: 1.12.2; 1.12.4;
Eliminate commons.

branches: 1.11.4; 1.11.6; 1.11.8;
Update protocoles and interfaces stats counters to 64bit.
RTM_IFINFO is now 0xf, 0xe is RTM_OIFINFO which returns the old (if_msghdr14)
struct with 32bit counters (binary compat, conditioned on COMPAT_14).
Same for sysctl: node 3 is renamed NET_RT_OIFLIST, NET_RT_IFLIST is now node 4.
Change rt_msg1() to add an mbuf to the mbuf chain instead of just panic()
when the message is larger than MHLEN.

branches: 1.10.14; 1.10.20;
add/cleanup multiple inclusion protection.

netinet prototypes

Implement IGMP v2. Based on the Multicast 3.5 distribution.

KERNEL -> _KERNEL

New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Change the counters to be all the same type -- u_long.

Prototype the rest.

Fix some inconsistent spacing; spaces at the end of lines, etc.

branches: 1.1.1;
multicast support.
>From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.

Use non-variadic function pointer in protosw::pr_input.

branches: 1.24.26;
Make IGMP and multicast group management code MP-safe. Use a read-write
lock to protect the hash table of multicast address records; also, make it
private and eliminate some macros. In the long term, the lookup path ought
to be optimised.

branches: 1.23.48; 1.23.64;
Make IGMP stats per-cpu.

branches: 1.22.70;
Multiple inclusion protection, as suggested by christos@ on tech-kern@
few days ago.

branches: 1.21.12;
Initialise (most) pools from a link set instead of explicit calls
to pool_init. Untouched pools are ones that either in arch-specific
code, or aren't initialiased during initial system startup.

Convert struct session, ucred and lockf to pools.

no space between function name and paren: foo (blah) -> foo(blah)

De __P()

There is also no reason to use arc4random() here.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.16.2;
purge rti structure (in igmp.c) for removed ifp on if_detach().

Change the way multicasts are kept. They now use a hash table in the same
manner as the ifaddr hash table. By doing this, the mkludge code can go
away. At the same time, keep track of what pcbs are using what ifaddr and
when an address is deleted from an interface, notify/abort all sockets
that have that address as a source. Switch IGMP and multicasts to use pools
for allocation. Fix a number of potential problems in the igmp code where
allocation failures could cause a trap/panic.

Changes to allow the IPv4 and IPv6 layers to align headers themseves,
as necessary:
* Implement a new mbuf utility routine, m_copyup(), is is like
m_pullup(), except that it always prepends and copies, rather
than only doing so if the desired length is larger than m->m_len.
m_copyup() also allows an offset into the destination mbuf, which
allows space for packet headers, in the forwarding case.
* Add *_HDR_ALIGNED_P() macros for IP, IPv6, ICMP, and IGMP. These
macros expand to 1 if __NO_STRICT_ALIGNMENT is defined, so that
architectures which do not have strict alignment constraints don't
pay for the test or visit the new align-if-needed path.
* Use the new macros to check if a header needs to be aligned, or to
assert that it already is, as appropriate.

Note: This code is still somewhat experimental. However, the new
code path won't be visited if individual device drivers continue
to guarantee that packets are delivered to layer 3 already properly
aligned (which are rules that are already in use).

use arc4random

branches: 1.12.2; 1.12.4;
Eliminate commons.

branches: 1.11.4; 1.11.6; 1.11.8;
Update protocoles and interfaces stats counters to 64bit.
RTM_IFINFO is now 0xf, 0xe is RTM_OIFINFO which returns the old (if_msghdr14)
struct with 32bit counters (binary compat, conditioned on COMPAT_14).
Same for sysctl: node 3 is renamed NET_RT_OIFLIST, NET_RT_IFLIST is now node 4.
Change rt_msg1() to add an mbuf to the mbuf chain instead of just panic()
when the message is larger than MHLEN.

branches: 1.10.14; 1.10.20;
add/cleanup multiple inclusion protection.

netinet prototypes

Implement IGMP v2. Based on the Multicast 3.5 distribution.

KERNEL -> _KERNEL

New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Change the counters to be all the same type -- u_long.

Prototype the rest.

Fix some inconsistent spacing; spaces at the end of lines, etc.

branches: 1.1.1;
multicast support.
>From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.