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initial import (Boeing r1752, NRL r878)

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27
kernel/freebsd/ng_wlan/Makefile Normal file
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#
# (c)2006-2011 the Boeing Company
#
# ng_wlan
#
.if !defined(PLATFORM)
#PLATFORM=i386
PLATFORM=amd64
.endif
CFLAGS+=-I/usr/src/sys/${PLATFORM}/compile/CORE -DMULTICAST_LOOKUPS
# FreeBSD 4.11 is "FreeBSD" and 7.0 is "freebsd7.0"
#.if defined(OSTYPE)
#.if (${OSTYPE} == "FreeBSD")
#CFLAGS+=-DFREEBSD411
#.endif
#.endif
KMOD= ng_wlan
SRCS= ng_wlan.c
#MAN= ng_wlan.4
.include <bsd.kmod.mk>

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kernel/freebsd/ng_wlan/README Normal file
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ng_wlan FreeBSD kernel module
(c) 2006-2011 the Boeing Company
author: Jeff Ahrenholz <jeffrey.m.ahrenholz@boeing.com>
The ng_wlan modules implements a netgraph node that models wireless
LAN connectivity. ng_wlan extends the ng_hub node, only instead of sending
packets to each connected peer, maintains a hash table of node connectivity,
and sends packets between two nodes only when they are linked. By default all
nodes are unlinked. Nodes can be linked and unlinked using "link" and
"unlink" messages:
ngctl msg e0_n2: link { node1=0x23 node2=0x0c }
The node IDs of the two nodes are the parameters, as depicted above.
Link effects between can also be specified for each node pair. If two nodes
are linked and parameters are specified, an mbuf tag will be added to each data
packet mbuf that specifies the effects. For FreeBSD 4.11, the metadata parameter
is used instead of mbuf tags. Delay (microseconds), bandwidth
(bits per second), PER (% packet errors), duplicates (%), jitter
(microseconds), and burst (% burst errors) are supported. This tag is then
removed by the ng_pipe node and the appropriate effects are applied. Link
effects are specified with "set" and "unset" messages:
ngctl msg e0_n2: set { node1=0x23 node2=0x0c delay=50000 bandwidth=54000000 per=0 duplicate=0 jitter=5000 burst=30 }
ngctl msg e0_n2: unset { node1=0x23 node2=0x0c }
Note that a special ng_pipe module is needed (the default one does not support
the mbuf tags and some effects.)
A separate error rate and burst rate affecting all multicast packets may be
defined. Use the "mer" message:
ngctl msg e0_n2: mer { mer=20 mburst=35 }
The above example sets the multicast error rate to drop 20% of all multicast
packets, with 35% burst errors.
When MULTICAST_LOOKUPS is defined, a second lookup table is defined for each
WLAN where multicast group, source, and node pair tuples can be linked or
unlinked. This causes different forwarding behavior for multicast packets,
where non-local groups are only forwarded if the node pair has been linked
together for that group (and the normal node pair has been linked).
Usage:
ngctl msg e0_n2: mcastset { node1=0x23 node2=0x0c group=0xEF020364 source=0x0a000002 }
ngctl msg e0_n2: mcastset { node1=0x23 node2=0x0c group=0xEF020364 source=0}
ngctl msg e0_n2: mcastunset { node1=0x23 node2=0x0c group=0xEF020364 source=0 }
Once the first mcastset/mcastunset message is received, that ng_wlan will drop
all non-local multicast packets that do not have a matching source, group,
node pair entry. The source address of zero matches any IP source.

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kernel/freebsd/ng_wlan/ng_wlan.c Normal file
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109
kernel/freebsd/ng_wlan/ng_wlan.h Normal file
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/*
* Copyright (c) 2006-2011 the Boeing Company
* ng_wlan is based on ng_hub, which is:
* Copyright (c) 2004 Ruslan Ermilov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef _NETGRAPH_NG_WLAN_H_
#define _NETGRAPH_NG_WLAN_H_
/* Node type name and magic cookie. */
#define NG_WLAN_NODE_TYPE "wlan"
#define NGM_WLAN_COOKIE 1146673193
/* Control message parse info */
struct ng_wlan_config {
u_int32_t node1;
u_int32_t node2;
};
#define NG_WLAN_CONFIG_TYPE_INFO { \
{ "node1", &ng_parse_uint32_type }, \
{ "node2", &ng_parse_uint32_type }, \
{ NULL } \
}
struct ng_wlan_set_data {
u_int32_t node1;
u_int32_t node2;
u_int64_t delay; /* keep these aligned with struct ng_wlan_tag */
u_int64_t bandwidth;
u_int16_t per;
u_int16_t duplicate;
u_int32_t jitter;
u_int16_t burst;
};
#define NG_WLAN_SET_DATA_TYPE_INFO { \
{ "node1", &ng_parse_uint32_type }, \
{ "node2", &ng_parse_uint32_type }, \
{ "delay", &ng_parse_uint64_type }, \
{ "bandwidth", &ng_parse_uint64_type }, \
{ "per", &ng_parse_uint16_type }, \
{ "duplicate", &ng_parse_uint16_type }, \
{ "jitter", &ng_parse_uint32_type }, \
{ "burst", &ng_parse_uint16_type }, \
{ NULL } \
}
struct ng_wlan_mer {
uint16_t mer;
uint16_t mburst;
};
#define NG_WLAN_MER_TYPE_INFO { \
{ "mer", &ng_parse_uint16_type }, \
{ "mburst", &ng_parse_uint16_type }, \
{ NULL } \
}
#ifdef MULTICAST_LOOKUPS
struct ng_wlan_multicast_set_data {
u_int32_t node1;
u_int32_t node2;
u_int32_t group;
u_int32_t source;
};
#define NG_WLAN_MULTICAST_SET_DATA_TYPE_INFO { \
{ "node1", &ng_parse_uint32_type }, \
{ "node2", &ng_parse_uint32_type }, \
{ "group", &ng_parse_uint32_type }, \
{ "source", &ng_parse_uint32_type }, \
{ NULL } \
}
#endif /* MULTICAST_LOOKUPS */
/* List of supported Netgraph control messages */
enum {
NGM_WLAN_LINK_NODES = 1,
NGM_WLAN_UNLINK_NODES,
NGM_WLAN_NODES_SET,
NGM_WLAN_NODES_UNSET,
NGM_WLAN_NODES_GET,
NGM_WLAN_MER, /* MULTICAST_ERR */
NGM_WLAN_MULTICAST_SET, /* MULTICAST_LOOKUPS */
NGM_WLAN_MULTICAST_UNSET, /* MULTICAST_LOOKUPS */
NGM_WLAN_MULTICAST_GET, /* MULTICAST_LOOKUPS */
};
#endif /* _NETGRAPH_NG_WLAN_H_ */

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kernel/freebsd/ng_wlan/ng_wlan_tag.h Normal file
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/*
* Copyright (c) 2006-2011 the Boeing Company
* All rights reserved.
*
* author: Jeff Ahrenholz <jeffrey.m.ahrenholz@boeing.com>
*/
#define NG_TAG_WLAN 0x01
#ifdef FREEBSD411
#define WLAN_META_SIZE (sizeof(struct ng_meta))+(sizeof(struct ng_wlan_tag))
#define WLAN_META_PRIORITY 0x01
#define TAGSIZE (sizeof(struct ng_wlan_tag) - sizeof(struct meta_field_header))
#else
#define TAGSIZE (sizeof(struct ng_wlan_tag) - sizeof(struct m_tag))
#endif
#define NG_WLAN_MAX_DELAY 2000000 /* 2,000,000us = 2s */
#define NG_WLAN_MAX_BW 1000000000 /* 1,000,000,000bps = 1000M */
#define NG_WLAN_MAX_PER 100 /* 100% */
#define NG_WLAN_MAX_DUP 50 /* 50% */
#define NG_WLAN_MAX_JITTER NG_WLAN_MAX_DELAY
#define NG_WLAN_MAX_BURST NG_WLAN_MAX_PER
/* Tag data that is prepended to packets passing through the WLAN node.
*/
struct ng_wlan_tag {
#ifdef FREEBSD411
struct meta_field_header meta_hdr;
#else
struct m_tag tag;
#endif
u_int64_t delay;
u_int64_t bandwidth;
u_int16_t per;
u_int16_t duplicate;
u_int32_t jitter;
u_int16_t burst;
};
#define TAG_HAS_DATA(t) (t->delay || t->bandwidth || t->per || t->duplicate \
|| t->jitter || t->burst )
#define WLAN_TAG_ZERO(t) do { \
t->delay = 0; \
t->bandwidth = 0; \
t->per = 0; \
t->duplicate = 0; \
t->jitter = 0; \
t->burst = 0; \
} while(0);
#define WLAN_TAG_COPY(a, b) do { \
a->delay = ((struct ng_wlan_tag*)b)->delay; \
a->bandwidth = ((struct ng_wlan_tag*)b)->bandwidth; \
a->per = ((struct ng_wlan_tag*)b)->per; \
a->duplicate = ((struct ng_wlan_tag*)b)->duplicate; \
a->jitter = ((struct ng_wlan_tag*)b)->jitter; \
a->burst = ((struct ng_wlan_tag*)b)->burst; \
} while(0);