ng_mppc.c File Reference

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_mppc.h>
#include "opt_netgraph.h"
#include <crypto/sha1.h>

Include dependency graph for ng_mppc.c:

Go to the source code of this file.

Data Structures
struct	ng_mppc_dir
struct	ng_mppc_private

Macros
#define	M_NETGRAPH_MPPC   M_NETGRAPH
#define	MPPC_DECOMP_BUFSIZE   8092 /* allocate buffer this big */
#define	MPPC_DECOMP_SAFETY   100 /* plus this much margin */
#define	MPPC_HDRLEN   2
#define	KEYLEN(b)   (((b) & MPPE_128) ? 16 : 8)
#define	MPPE_MAX_REKEY   1000
#define	MPPC_FLAG_FLUSHED   0x8000 /* xmitter reset state */
#define	MPPC_FLAG_RESTART   0x4000 /* compress history restart */
#define	MPPC_FLAG_COMPRESSED   0x2000 /* packet is compresed */
#define	MPPC_FLAG_ENCRYPTED   0x1000 /* packet is encrypted */
#define	MPPC_CCOUNT_MASK   0x0fff /* sequence number mask */
#define	MPPC_CCOUNT_INC(d)   ((d) = (((d) + 1) & MPPC_CCOUNT_MASK))
#define	MPPE_UPDATE_MASK   0xff /* coherency count when we're */
#define	MPPE_UPDATE_FLAG   0xff /* supposed to update key */
#define	MPPC_COMP_OK   0x05
#define	MPPC_DECOMP_OK   0x05
#define	ERROUT(x)   do { error = (x); goto done; } while (0)

Typedefs
typedef struct ng_mppc_private *	priv_p

Functions
	SYSCTL_NODE (_net_graph, OID_AUTO, mppe, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "MPPE")
	SYSCTL_INT (_net_graph_mppe, OID_AUTO, block_on_max_rekey, CTLFLAG_RWTUN, &mppe_block_on_max_rekey, 0, "Block node on max MPPE key re-calculations")
	SYSCTL_INT (_net_graph_mppe, OID_AUTO, log_max_rekey, CTLFLAG_RWTUN, &mppe_log_max_rekey, 0, "Log max MPPE key re-calculations event")
	SYSCTL_INT (_net_graph_mppe, OID_AUTO, max_rekey, CTLFLAG_RWTUN, &mppe_max_rekey, 0, "Maximum number of MPPE key re-calculations")
static int	ng_mppc_compress (node_p node, struct mbuf **datap)
static int	ng_mppc_decompress (node_p node, struct mbuf **datap)
static void	ng_mppc_reset_req (node_p node)
	NETGRAPH_INIT (mppc, &ng_mppc_typestruct)
static int	ng_mppc_constructor (node_p node)
static int	ng_mppc_newhook (node_p node, hook_p hook, const char *name)
static int	ng_mppc_rcvmsg (node_p node, item_p item, hook_p lasthook)
static int	ng_mppc_rcvdata (hook_p hook, item_p item)
static int	ng_mppc_shutdown (node_p node)
static int	ng_mppc_disconnect (hook_p hook)

Variables
static int	mppe_block_on_max_rekey = 0
static int	mppe_log_max_rekey = 1
static int	mppe_max_rekey = MPPE_MAX_REKEY
static ng_constructor_t	ng_mppc_constructor
static ng_rcvmsg_t	ng_mppc_rcvmsg
static ng_shutdown_t	ng_mppc_shutdown
static ng_newhook_t	ng_mppc_newhook
static ng_rcvdata_t	ng_mppc_rcvdata
static ng_disconnect_t	ng_mppc_disconnect
static struct ng_type	ng_mppc_typestruct
static const u_char	ng_mppe_weakenkey [3] = { 0xd1, 0x26, 0x9e }

Macro Definition Documentation

ERROUT

#define ERROUT

(

x

)

do { error = (x); goto done; } while (0)

Definition at line 204 of file ng_mppc.c.

KEYLEN

#define KEYLEN

(

b

)

(((b) & MPPE_128) ? 16 : 8)

Definition at line 99 of file ng_mppc.c.

M_NETGRAPH_MPPC

#define M_NETGRAPH_MPPC   M_NETGRAPH

Definition at line 80 of file ng_mppc.c.

MPPC_CCOUNT_INC

#define MPPC_CCOUNT_INC

(

d

)

((d) = (((d) + 1) & MPPC_CCOUNT_MASK))

Definition at line 132 of file ng_mppc.c.

MPPC_CCOUNT_MASK

#define MPPC_CCOUNT_MASK   0x0fff /* sequence number mask */

Definition at line 130 of file ng_mppc.c.

MPPC_COMP_OK

#define MPPC_COMP_OK   0x05

Definition at line 137 of file ng_mppc.c.

MPPC_DECOMP_BUFSIZE

#define MPPC_DECOMP_BUFSIZE   8092 /* allocate buffer this big */

Definition at line 92 of file ng_mppc.c.

MPPC_DECOMP_OK

#define MPPC_DECOMP_OK   0x05

Definition at line 138 of file ng_mppc.c.

MPPC_DECOMP_SAFETY

#define MPPC_DECOMP_SAFETY   100 /* plus this much margin */

Definition at line 93 of file ng_mppc.c.

MPPC_FLAG_COMPRESSED

#define MPPC_FLAG_COMPRESSED   0x2000 /* packet is compresed */

Definition at line 128 of file ng_mppc.c.

MPPC_FLAG_ENCRYPTED

#define MPPC_FLAG_ENCRYPTED   0x1000 /* packet is encrypted */

Definition at line 129 of file ng_mppc.c.

MPPC_FLAG_FLUSHED

#define MPPC_FLAG_FLUSHED   0x8000 /* xmitter reset state */

Definition at line 126 of file ng_mppc.c.

MPPC_FLAG_RESTART

#define MPPC_FLAG_RESTART   0x4000 /* compress history restart */

Definition at line 127 of file ng_mppc.c.

MPPC_HDRLEN

#define MPPC_HDRLEN   2

Definition at line 96 of file ng_mppc.c.

MPPE_MAX_REKEY

#define MPPE_MAX_REKEY   1000

Definition at line 108 of file ng_mppc.c.

MPPE_UPDATE_FLAG

#define MPPE_UPDATE_FLAG   0xff /* supposed to update key */

Definition at line 135 of file ng_mppc.c.

MPPE_UPDATE_MASK

#define MPPE_UPDATE_MASK   0xff /* coherency count when we're */

Definition at line 134 of file ng_mppc.c.

Typedef Documentation

priv_p

typedef struct ng_mppc_private* priv_p

Definition at line 161 of file ng_mppc.c.

Function Documentation

NETGRAPH_INIT()

NETGRAPH_INIT	(	mppc	,
		&	ng_mppc_typestruct
	)

ng_mppc_compress()

static int ng_mppc_compress ( node_p  node, struct mbuf **  datap  )

static

Definition at line 477 of file ng_mppc.c.

References ng_mppc_config::bits, ng_mppc_dir::cc, ng_mppc_dir::cfg, flags, ng_mppc_dir::flushed, header, KEYLEN, M_NETGRAPH_MPPC, MPPC_BIT, MPPC_CCOUNT_INC, MPPC_COMP_OK, MPPC_FLAG_COMPRESSED, MPPC_FLAG_ENCRYPTED, MPPC_FLAG_FLUSHED, MPPC_FLAG_RESTART, MPPC_HDRLEN, MPPC_MAX_BLOWUP, MPPE_BITS, MPPE_STATELESS, MPPE_UPDATE_FLAG, MPPE_UPDATE_MASK, NG_NODE_PRIVATE, and ng_mppc_config::startkey.

Referenced by ng_mppc_rcvdata().

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ng_mppc_constructor()

static int ng_mppc_constructor ( node_p  node )

static

Definition at line 214 of file ng_mppc.c.

References M_NETGRAPH_MPPC, NG_NODE_FORCE_WRITER, and NG_NODE_SET_PRIVATE.

ng_mppc_decompress()

static int ng_mppc_decompress ( node_p  node, struct mbuf **  datap  )

static

Definition at line 626 of file ng_mppc.c.

References ng_mppc_config::bits, ng_mppc_dir::cc, ng_mppc_dir::cfg, flags, header, KEYLEN, M_NETGRAPH_MPPC, MPPC_BIT, MPPC_CCOUNT_INC, MPPC_CCOUNT_MASK, MPPC_DECOMP_BUFSIZE, MPPC_DECOMP_OK, MPPC_DECOMP_SAFETY, MPPC_FLAG_COMPRESSED, MPPC_FLAG_ENCRYPTED, MPPC_FLAG_FLUSHED, MPPC_FLAG_RESTART, MPPC_HDRLEN, MPPE_BITS, mppe_block_on_max_rekey, mppe_log_max_rekey, mppe_max_rekey, MPPE_STATELESS, MPPE_UPDATE_FLAG, MPPE_UPDATE_MASK, NG_NODE_PRIVATE, and ng_mppc_config::startkey.

Referenced by ng_mppc_rcvdata().

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ng_mppc_disconnect()

static int ng_mppc_disconnect ( hook_p  hook )

static

Definition at line 450 of file ng_mppc.c.

References NG_HOOK_NODE, NG_NODE_IS_VALID, NG_NODE_NUMHOOKS, NG_NODE_PRIVATE, and ng_rmnode_self().

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ng_mppc_newhook()

static int ng_mppc_newhook ( node_p  node, hook_p  hook, const char *  name  )

static

Definition at line 234 of file ng_mppc.c.

References name, NG_MPPC_HOOK_COMP, NG_MPPC_HOOK_DECOMP, and NG_NODE_PRIVATE.

ng_mppc_rcvdata()

static int ng_mppc_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 371 of file ng_mppc.c.

References NG_FREE_ITEM, NG_FREE_M, NG_FWD_NEW_DATA, NG_HOOK_NODE, NG_MKMESSAGE, ng_mppc_compress(), ng_mppc_decompress(), NG_NODE_PRIVATE, NG_SEND_MSG_ID, NGI_GET_M, NGM_MPPC_COOKIE, and NGM_MPPC_RESETREQ.

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ng_mppc_rcvmsg()

static int ng_mppc_rcvmsg ( node_p  node, item_p  item, hook_p  lasthook  )

static

Definition at line 260 of file ng_mppc.c.

References ng_mesg::ng_msghdr::arglen, ng_mppc_config::bits, ng_mesg::ng_msghdr::cmd, ng_mesg::data, ng_mppc_config::enable, ERROUT, ng_mesg::header, KEYLEN, M_NETGRAPH_MPPC, MPPC_BIT, MPPC_VALID_BITS, MPPE_40, MPPE_56, MPPE_BITS, NG_FREE_MSG, ng_mppc_reset_req(), ng_mppe_weakenkey, NG_NODE_PRIVATE, NG_RESPOND_MSG, NGI_GET_MSG, NGI_RETADDR, NGM_MPPC_CONFIG_COMP, NGM_MPPC_CONFIG_DECOMP, NGM_MPPC_COOKIE, NGM_MPPC_RESETREQ, ng_mppc_config::startkey, and ng_mesg::ng_msghdr::typecookie.

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ng_mppc_reset_req()

static void ng_mppc_reset_req ( node_p  node )

static

Definition at line 842 of file ng_mppc.c.

References ng_mppc_config::bits, ng_mppc_dir::cfg, ng_mppc_dir::flushed, KEYLEN, MPPE_STATELESS, and NG_NODE_PRIVATE.

Referenced by ng_mppc_rcvmsg().

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ng_mppc_shutdown()

static int ng_mppc_shutdown ( node_p  node )

static

Definition at line 428 of file ng_mppc.c.

References M_NETGRAPH_MPPC, NG_NODE_PRIVATE, NG_NODE_SET_PRIVATE, and NG_NODE_UNREF.

SYSCTL_INT() [1/3]

SYSCTL_INT	(	_net_graph_mppe	,
		OID_AUTO	,
		block_on_max_rekey	,
		CTLFLAG_RWTUN	,
		&	mppe_block_on_max_rekey,
		0	,
		"Block node on max MPPE key re-calculations"
	)

SYSCTL_INT() [2/3]

SYSCTL_INT	(	_net_graph_mppe	,
		OID_AUTO	,
		log_max_rekey	,
		CTLFLAG_RWTUN	,
		&	mppe_log_max_rekey,
		0	,
		"Log max MPPE key re-calculations event"
	)

SYSCTL_INT() [3/3]

SYSCTL_INT	(	_net_graph_mppe	,
		OID_AUTO	,
		max_rekey	,
		CTLFLAG_RWTUN	,
		&	mppe_max_rekey,
		0	,
		"Maximum number of MPPE key re-calculations"
	)

SYSCTL_NODE()

SYSCTL_NODE	(	_net_graph	,
		OID_AUTO	,
		mppe	,
		CTLFLAG_RW|	CTLFLAG_MPSAFE,
		0	,
		"MPPE"
	)

Variable Documentation

mppe_block_on_max_rekey

int mppe_block_on_max_rekey = 0

static

Definition at line 113 of file ng_mppc.c.

Referenced by ng_mppc_decompress().

mppe_log_max_rekey

int mppe_log_max_rekey = 1

static

Definition at line 117 of file ng_mppc.c.

Referenced by ng_mppc_decompress().

mppe_max_rekey

int mppe_max_rekey = MPPE_MAX_REKEY

static

Definition at line 121 of file ng_mppc.c.

Referenced by ng_mppc_decompress().

ng_mppc_constructor

ng_constructor_t ng_mppc_constructor

static

Definition at line 164 of file ng_mppc.c.

ng_mppc_disconnect

ng_disconnect_t ng_mppc_disconnect

static

Definition at line 169 of file ng_mppc.c.

ng_mppc_newhook

ng_newhook_t ng_mppc_newhook

static

Definition at line 167 of file ng_mppc.c.

ng_mppc_rcvdata

ng_rcvdata_t ng_mppc_rcvdata

static

Definition at line 168 of file ng_mppc.c.

ng_mppc_rcvmsg

ng_rcvmsg_t ng_mppc_rcvmsg

static

Definition at line 165 of file ng_mppc.c.

ng_mppc_shutdown

ng_shutdown_t ng_mppc_shutdown

static

Definition at line 166 of file ng_mppc.c.

ng_mppc_typestruct

struct ng_type ng_mppc_typestruct

static

Initial value:

= {
        .version =      NG_ABI_VERSION,
        .name =         NG_MPPC_NODE_TYPE,
        .constructor =  ng_mppc_constructor,
        .rcvmsg =       ng_mppc_rcvmsg,
        .shutdown =     ng_mppc_shutdown,
        .newhook =      ng_mppc_newhook,
        .rcvdata =      ng_mppc_rcvdata,
        .disconnect =   ng_mppc_disconnect,
}

Definition at line 184 of file ng_mppc.c.

ng_mppe_weakenkey

const u_char ng_mppe_weakenkey[3] = { 0xd1, 0x26, 0x9e }

static

Definition at line 202 of file ng_mppc.c.

Referenced by ng_mppc_rcvmsg().