1
2 /*
3 * ng_pppoe.h
4 *
5 * Copyright (c) 1996-1999 Whistle Communications, Inc.
6 * All rights reserved.
7 *
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 * copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 * Communications, Inc. trademarks, including the mark "WHISTLE
16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 * such appears in the above copyright notice or in the software.
18 *
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
35 * OF SUCH DAMAGE.
36 *
37 * Author: Julian Elischer <julian@freebsd.org>
38 *
39 * $FreeBSD: releng/5.0/sys/netgraph/ng_pppoe.h 103870 2002-09-23 18:54:32Z alfred $
40 * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
41 */
42
43 #ifndef _NETGRAPH_PPPOE_H_
44 #define _NETGRAPH_PPPOE_H_
45
46 /********************************************************************
47 * Netgraph hook constants etc.
48 ********************************************************************/
49 /* Node type name. This should be unique among all netgraph node types */
50 #define NG_PPPOE_NODE_TYPE "pppoe"
51
52 #define NGM_PPPOE_COOKIE 939032003
53
54 /* Number of active sessions we can handle */
55 #define PPPOE_NUM_SESSIONS 16 /* for now */
56 #define PPPOE_SERVICE_NAME_SIZE 64 /* for now */
57
58 /* Hook names */
59 #define NG_PPPOE_HOOK_ETHERNET "ethernet"
60 #define NG_PPPOE_HOOK_PADI "PADI" /* default PADI requests come here */
61 #define NG_PPPOE_HOOK_S_LEADIN "service" /* PADO responses from PADI */
62 #define NG_PPPOE_HOOK_C_LEADIN "client" /* Connect message starts this */
63 #define NG_PPPOE_HOOK_DEBUG "debug"
64
65 /**********************************************************************
66 * Netgraph commands understood by this node type.
67 * FAIL, SUCCESS, CLOSE and ACNAME are sent by the node rather than received.
68 ********************************************************************/
69 enum cmd {
70 NGM_PPPOE_SET_FLAG = 1,
71 NGM_PPPOE_CONNECT = 2, /* Client, Try find this service */
72 NGM_PPPOE_LISTEN = 3, /* Server, Await a request for this service */
73 NGM_PPPOE_OFFER = 4, /* Server, hook X should respond (*) */
74 NGM_PPPOE_SUCCESS = 5, /* State machine connected */
75 NGM_PPPOE_FAIL = 6, /* State machine could not connect */
76 NGM_PPPOE_CLOSE = 7, /* Session closed down */
77 NGM_PPPOE_SERVICE = 8, /* additional Service to advertise (in PADO) */
78 NGM_PPPOE_ACNAME = 9, /* AC_NAME for informational purposes */
79 NGM_PPPOE_GET_STATUS = 10, /* data in/out */
80 NGM_PPPOE_SESSIONID = 11 /* Session_ID for informational purposes */
81 };
82
83 /***********************
84 * Structures passed in the various netgraph command messages.
85 ***********************/
86 /* This structure is returned by the NGM_PPPOE_GET_STATUS command */
87 struct ngpppoestat {
88 u_int packets_in; /* packets in from ethernet */
89 u_int packets_out; /* packets out towards ethernet */
90 };
91
92 /* Keep this in sync with the above structure definition */
93 #define NG_PPPOESTAT_TYPE_INFO { \
94 { "packets_in", &ng_parse_uint_type }, \
95 { "packets_out", &ng_parse_uint_type }, \
96 { NULL } \
97 }
98
99 /*
100 * When this structure is accepted by the NGM_PPPOE_CONNECT command :
101 * The data field is MANDATORY.
102 * The session sends out a PADI request for the named service.
103 *
104 *
105 * When this structure is accepted by the NGM_PPPOE_LISTEN command.
106 * If no service is given this is assumed to accept ALL PADI requests.
107 * This may at some time take a regexp expression, but not yet.
108 * Matching PADI requests will be passed up the named hook.
109 *
110 *
111 * When this structure is accepted by the NGM_PPPOE_OFFER command:
112 * The AC-NAme field is set from that given and a PADI
113 * packet is expected to arrive from the session control daemon, on the
114 * named hook. The session will then issue the appropriate PADO
115 * and begin negotiation.
116 */
117 struct ngpppoe_init_data {
118 char hook[NG_HOOKLEN + 1]; /* hook to monitor on */
119 u_int16_t data_len; /* Length of the service name */
120 char data[0]; /* init data goes here */
121 };
122
123 /* Keep this in sync with the above structure definition */
124 #define NG_PPPOE_INIT_DATA_TYPE_INFO { \
125 { "hook", &ng_parse_hookbuf_type }, \
126 { "data", &ng_parse_sizedstring_type }, \
127 { NULL } \
128 }
129
130 /*
131 * This structure is used by the asychronous success and failure messages.
132 * (to report which hook has failed or connected). The message is sent
133 * to whoever requested the connection. (close may use this too).
134 */
135 struct ngpppoe_sts {
136 char hook[NG_HOOKLEN + 1]; /* hook associated with event session */
137 };
138
139 /* Keep this in sync with the above structure definition */
140 #define NG_PPPOE_STS_TYPE_INFO { \
141 { "hook", &ng_parse_hookbuf_type }, \
142 { NULL } \
143 }
144
145
146 /********************************************************************
147 * Constants and definitions specific to pppoe
148 ********************************************************************/
149
150 #define PPPOE_TIMEOUT_LIMIT 64
151 #define PPPOE_OFFER_TIMEOUT 16
152 #define PPPOE_INITIAL_TIMEOUT 2
153
154 /* Codes to identify message types */
155 #define PADI_CODE 0x09
156 #define PADO_CODE 0x07
157 #define PADR_CODE 0x19
158 #define PADS_CODE 0x65
159 #define PADT_CODE 0xa7
160
161 /* Tag identifiers */
162 #if BYTE_ORDER == BIG_ENDIAN
163 #define PTT_EOL (0x0000)
164 #define PTT_SRV_NAME (0x0101)
165 #define PTT_AC_NAME (0x0102)
166 #define PTT_HOST_UNIQ (0x0103)
167 #define PTT_AC_COOKIE (0x0104)
168 #define PTT_VENDOR (0x0105)
169 #define PTT_RELAY_SID (0x0106)
170 #define PTT_SRV_ERR (0x0201)
171 #define PTT_SYS_ERR (0x0202)
172 #define PTT_GEN_ERR (0x0203)
173
174 #define ETHERTYPE_PPPOE_DISC 0x8863 /* pppoe discovery packets */
175 #define ETHERTYPE_PPPOE_SESS 0x8864 /* pppoe session packets */
176 #define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
177 #define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets 3com? */
178 #else
179 #define PTT_EOL (0x0000)
180 #define PTT_SRV_NAME (0x0101)
181 #define PTT_AC_NAME (0x0201)
182 #define PTT_HOST_UNIQ (0x0301)
183 #define PTT_AC_COOKIE (0x0401)
184 #define PTT_VENDOR (0x0501)
185 #define PTT_RELAY_SID (0x0601)
186 #define PTT_SRV_ERR (0x0102)
187 #define PTT_SYS_ERR (0x0202)
188 #define PTT_GEN_ERR (0x0302)
189
190 #define ETHERTYPE_PPPOE_DISC 0x6388 /* pppoe discovery packets */
191 #define ETHERTYPE_PPPOE_SESS 0x6488 /* pppoe session packets */
192 #define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
193 #define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets 3com? */
194 #endif
195
196 struct pppoe_tag {
197 u_int16_t tag_type;
198 u_int16_t tag_len;
199 char tag_data[0];
200 }__packed;
201
202 struct pppoe_hdr{
203 u_int8_t ver:4;
204 u_int8_t type:4;
205 u_int8_t code;
206 u_int16_t sid;
207 u_int16_t length;
208 struct pppoe_tag tag[0];
209 }__packed;
210
211
212 struct pppoe_full_hdr {
213 struct ether_header eh;
214 struct pppoe_hdr ph;
215 }__packed;
216
217 union packet {
218 struct pppoe_full_hdr pkt_header;
219 u_int8_t bytes[2048];
220 };
221
222 struct datatag {
223 struct pppoe_tag hdr;
224 u_int8_t data[PPPOE_SERVICE_NAME_SIZE];
225 };
226
227
228 /*
229 * Define the order in which we will place tags in packets
230 * this may be ignored
231 */
232 /* for PADI */
233 #define TAGI_SVC 0
234 #define TAGI_HUNIQ 1
235 /* for PADO */
236 #define TAGO_ACNAME 0
237 #define TAGO_SVC 1
238 #define TAGO_COOKIE 2
239 #define TAGO_HUNIQ 3
240 /* for PADR */
241 #define TAGR_SVC 0
242 #define TAGR_HUNIQ 1
243 #define TAGR_COOKIE 2
244 /* for PADS */
245 #define TAGS_ACNAME 0
246 #define TAGS_SVC 1
247 #define TAGS_COOKIE 2
248 #define TAGS_HUNIQ 3
249 /* for PADT */
250
251 #endif /* _NETGRAPH_PPPOE_H_ */
252
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