Whistle's Netgraph link-layer (sometimes more) networking infrastructure.

Been in production for 3 years now. Gives Instant Frame relay to if_sr
and if_ar drivers, and PPPOE support soon. See:
ftp://ftp.whistle.com/pub/archie/netgraph/index.html
for on-line manual pages.

Reviewed by: Doug Rabson (dfr@freebsd.org)
Obtained from:  Whistle CVS tree

1 files changed, 224 insertions, 0 deletions

diff --git a/sys/netgraph/ng_pppoe.h b/sys/netgraph/ng_pppoe.h
new file mode 100644
index 0000000..5ee3e7d
--- /dev/null
+++ b/sys/netgraph/ng_pppoe.h
@@ -0,0 +1,224 @@
+
+/*
+ * ng_pppoe.h
+ *
+ * Copyright (c) 1996-1999 Whistle Communications, Inc.
+ * All rights reserved.
+ * 
+ * Subject to the following obligations and disclaimer of warranty, use and
+ * redistribution of this software, in source or object code forms, with or
+ * without modifications are expressly permitted by Whistle Communications;
+ * provided, however, that:
+ * 1. Any and all reproductions of the source or object code must include the
+ *    copyright notice above and the following disclaimer of warranties; and
+ * 2. No rights are granted, in any manner or form, to use Whistle
+ *    Communications, Inc. trademarks, including the mark "WHISTLE
+ *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
+ *    such appears in the above copyright notice or in the software.
+ * 
+ * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
+ * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
+ * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
+ * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
+ * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
+ * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
+ * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
+ * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
+ * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
+ * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Julian Elischer <julian@whistle.com>
+ *
+ * $FreeBSD$
+ * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
+ */
+
+#ifndef _NETGRAPH_PPPOE_H_
+#define _NETGRAPH_PPPOE_H_
+
+/********************************************************************
+ * Netgraph hook constants etc.
+ ********************************************************************/
+/* Node type name. This should be unique among all netgraph node types */
+#define NG_PPPOE_NODE_TYPE	"PPPoE"
+
+#define NGM_PPPOE_COOKIE		939032003
+
+/* Number of active sessions we can handle */
+#define	PPPOE_NUM_SESSIONS		16 /* for now */
+#define	PPPOE_SERVICE_NAME_SIZE		64 /* for now */
+
+/* Hook names */
+#define NG_PPPOE_HOOK_ETHERNET	"ethernet"
+#define NG_PPPOE_HOOK_PADI	"PADI"    /* default PADI requests come here */
+#define NG_PPPOE_HOOK_S_LEADIN	"service" /* PADO responses from PADI */
+#define NG_PPPOE_HOOK_C_LEADIN	"client"  /* Connect message starts this */
+#define NG_PPPOE_HOOK_DEBUG	"debug"
+
+/**********************************************************************
+ * Netgraph commands understood by this node type.
+ * FAIL, SUCCESS and CLOSE are sent by the node rather than received.
+ ********************************************************************/
+enum {
+	NGM_PPPOE_SET_FLAG = 1,
+	NGM_PPPOE_CONNECT  = 2,	/* Client, Try find this service */
+	NGM_PPPOE_LISTEN   = 3,	/* Server, Await a request for this service */
+	NGM_PPPOE_OFFER    = 4,	/* Server, hook X should respond (*) */
+	NGM_PPPOE_SUCCESS  = 5,	/* State machine connected */
+	NGM_PPPOE_FAIL     = 6,	/* State machine could not connect */
+	NGM_PPPOE_CLOSE    = 7,	/* Session closed down */
+	NGM_PPPOE_GET_STATUS
+};
+
+/***********************
+ * Structures passed in the various netgraph command messages.
+ ***********************/
+/* This structure is returned by the NGM_PPPOE_GET_STATUS command */
+struct ngPPPoEstat {
+	u_int   packets_in;	/* packets in from downstream */
+	u_int   packets_out;	/* packets out towards downstream */
+};
+
+/*
+ * When this structure is accepted by the NGM_PPPOE_CONNECT command :
+ * The data field is MANDATORY.
+ * The session sends out a PADI request for the named service.
+ *
+ *
+ * When this structure is accepted by the NGM_PPPOE_WAIT command.
+ * If no service is given this is assumed to accept ALL PADI requests.
+ * This may at some time take a regexp exporession, but not yet.
+ * Matching PADI requests will be passed up the named hook.
+ *
+ *
+ * When this structure is accepted by the NGM_PPPOE_OFFER command:
+ * The AC-NAme field is set from that given and a PADI
+ * packet is expected to arrive from the session control daemon, on the
+ * named hook. The session will then issue the appropriate PADO
+ * and begin negotiation.
+ */
+struct ngPPPoE_init_data {
+	char	hook[NG_HOOKLEN + 1];	/* hook to monitor on */
+	u_int16_t	data_len;		/* Length of the service name */
+	char	data[0];		/* init data goes here */
+};
+
+/*
+ * This structure is used by the asychronous success and failure messages.
+ * (to report which hook has failed or connected). The message is sent
+ * to whoever requested the connection. (close may use this too).
+ */
+struct ngPPPoE_req {
+	char	hook[NG_HOOKLEN + 1]; /* hook associated with event session */
+};
+
+
+/********************************************************************
+ * Constants and definitions specific to PPPoE
+ ********************************************************************/
+
+#define PPPOE_TIMEOUT_LIMIT 64
+#define PPPOE_OFFER_TIMEOUT 16
+
+/* Codes to identify message types */
+#define PADI_CODE	0x09
+#define PADO_CODE	0x07
+#define PADR_CODE	0x19
+#define PADS_CODE	0x65
+#define PADT_CODE	0xa7
+
+/* Tag identifiers */
+#if BYTE_ORDER == BIG_ENDIAN
+#define PTT_EOL		(0x0000)
+#define PTT_SRV_NAME	(0x0101)
+#define PTT_AC_NAME	(0x0102)
+#define PTT_HOST_UNIQ	(0x0103)
+#define PTT_AC_COOKIE	(0x0104)
+#define PTT_VENDOR 	(0x0105)
+#define PTT_RELAY_SID	(0x0106)
+#define PTT_SRV_ERR     (0x0201)
+#define PTT_SYS_ERR  	(0x0202)
+#define PTT_GEN_ERR  	(0x0203)
+
+#define ETHERTYPE_PPPOE_DISC	0x8863	/* PPPoE discovery packets     */
+#define ETHERTYPE_PPPOE_SESS	0x8864	/* PPPoE session packets       */
+#else
+#define PTT_EOL		(0x0000)
+#define PTT_SRV_NAME	(0x0101)
+#define PTT_AC_NAME	(0x0201)
+#define PTT_HOST_UNIQ	(0x0301)
+#define PTT_AC_COOKIE	(0x0401)
+#define PTT_VENDOR 	(0x0501)
+#define PTT_RELAY_SID	(0x0601)
+#define PTT_SRV_ERR     (0x0102)
+#define PTT_SYS_ERR  	(0x0202)
+#define PTT_GEN_ERR  	(0x0302)
+
+#define ETHERTYPE_PPPOE_DISC	0x6388	/* PPPoE discovery packets     */
+#define ETHERTYPE_PPPOE_SESS	0x6488	/* PPPoE session packets       */
+#endif
+
+struct pppoe_tag {
+	u_int16_t tag_type;
+	u_int16_t tag_len;
+	char tag_data[0];
+}__attribute ((packed));
+
+struct pppoe_hdr{
+	u_int8_t ver:4;
+	u_int8_t type:4;
+	u_int8_t code;
+	u_int16_t sid;
+	u_int16_t length;
+	struct pppoe_tag tag[0];
+}__attribute__ ((packed));
+
+
+struct pppoe_full_hdr {
+	struct  ether_header eh;
+	struct pppoe_hdr ph;
+}__attribute__ ((packed));
+
+union	packet {
+	struct pppoe_full_hdr	pkt_header;
+	u_int8_t	bytes[2048];
+};
+
+struct datatag {
+        struct pppoe_tag hdr;
+	u_int8_t        data[PPPOE_SERVICE_NAME_SIZE];
+};     
+
+
+/*
+ * Define the order in which we will place tags in packets
+ * this may be ignored
+ */
+/* for PADI */
+#define TAGI_SVC 0
+#define TAGI_HUNIQ 1
+/* for PADO */
+#define TAGO_ACNAME 0
+#define TAGO_SVC 1
+#define TAGO_COOKIE 2
+#define TAGO_HUNIQ 3
+/* for PADR */
+#define TAGR_SVC 0
+#define TAGR_HUNIQ 1
+#define TAGR_COOKIE 2
+/* for PADS */
+#define TAGS_ACNAME 0
+#define TAGS_SVC 1
+#define TAGS_COOKIE 2
+#define TAGS_HUNIQ 3
+/* for PADT */
+
+#endif /* _NETGRAPH_PPPOE_H_ */
+