1 /*
2 * ng_pppoe.h
3 */
4
5 /*-
6 * Copyright (c) 1996-1999 Whistle Communications, Inc.
7 * All rights reserved.
8 *
9 * Subject to the following obligations and disclaimer of warranty, use and
10 * redistribution of this software, in source or object code forms, with or
11 * without modifications are expressly permitted by Whistle Communications;
12 * provided, however, that:
13 * 1. Any and all reproductions of the source or object code must include the
14 * copyright notice above and the following disclaimer of warranties; and
15 * 2. No rights are granted, in any manner or form, to use Whistle
16 * Communications, Inc. trademarks, including the mark "WHISTLE
17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
18 * such appears in the above copyright notice or in the software.
19 *
20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
36 * OF SUCH DAMAGE.
37 *
38 * Author: Julian Elischer <julian@freebsd.org>
39 *
40 * $FreeBSD$
41 * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
42 */
43
44 #ifndef _NETGRAPH_NG_PPPOE_H_
45 #define _NETGRAPH_NG_PPPOE_H_
46
47 /********************************************************************
48 * Netgraph hook constants etc.
49 ********************************************************************/
50 /* Node type name. This should be unique among all netgraph node types */
51 #define NG_PPPOE_NODE_TYPE "pppoe"
52
53 #define NGM_PPPOE_COOKIE 1089893072
54
55 /* Number of active sessions we can handle */
56 #define PPPOE_NUM_SESSIONS 16 /* for now */
57 #define PPPOE_SERVICE_NAME_SIZE 64 /* for now */
58
59 /* Hook names */
60 #define NG_PPPOE_HOOK_ETHERNET "ethernet"
61 #define NG_PPPOE_HOOK_PADI "PADI" /* default PADI requests come here */
62 #define NG_PPPOE_HOOK_S_LEADIN "service" /* PADO responses from PADI */
63 #define NG_PPPOE_HOOK_C_LEADIN "client" /* Connect message starts this */
64 #define NG_PPPOE_HOOK_DEBUG "debug"
65
66 /* Mode names */
67 #define NG_PPPOE_STANDARD "standard"
68 #define NG_PPPOE_NONSTANDARD "3Com"
69
70 /**********************************************************************
71 * Netgraph commands understood by this node type.
72 * FAIL, SUCCESS, CLOSE and ACNAME are sent by the node rather than received.
73 ********************************************************************/
74 enum cmd {
75 NGM_PPPOE_SET_FLAG = 1,
76 NGM_PPPOE_CONNECT = 2, /* Client, Try find this service */
77 NGM_PPPOE_LISTEN = 3, /* Server, Await a request for this service */
78 NGM_PPPOE_OFFER = 4, /* Server, hook X should respond (*) */
79 NGM_PPPOE_SUCCESS = 5, /* State machine connected */
80 NGM_PPPOE_FAIL = 6, /* State machine could not connect */
81 NGM_PPPOE_CLOSE = 7, /* Session closed down */
82 NGM_PPPOE_SERVICE = 8, /* additional Service to advertise (in PADO) */
83 NGM_PPPOE_ACNAME = 9, /* AC_NAME for informational purposes */
84 NGM_PPPOE_GET_STATUS = 10, /* data in/out */
85 NGM_PPPOE_SESSIONID = 11, /* Session_ID for informational purposes */
86 NGM_PPPOE_SETMODE = 12, /* set to standard or 3Com mode */
87 NGM_PPPOE_GETMODE = 13, /* see current mode */
88 };
89
90 /***********************
91 * Structures passed in the various netgraph command messages.
92 ***********************/
93 /* This structure is returned by the NGM_PPPOE_GET_STATUS command */
94 struct ngpppoestat {
95 u_int packets_in; /* packets in from ethernet */
96 u_int packets_out; /* packets out towards ethernet */
97 };
98
99 /* Keep this in sync with the above structure definition */
100 #define NG_PPPOESTAT_TYPE_INFO { \
101 { "packets_in", &ng_parse_uint_type }, \
102 { "packets_out", &ng_parse_uint_type }, \
103 { NULL } \
104 }
105
106 /*
107 * When this structure is accepted by the NGM_PPPOE_CONNECT command :
108 * The data field is MANDATORY.
109 * The session sends out a PADI request for the named service.
110 *
111 *
112 * When this structure is accepted by the NGM_PPPOE_LISTEN command.
113 * If no service is given this is assumed to accept ALL PADI requests.
114 * This may at some time take a regexp expression, but not yet.
115 * Matching PADI requests will be passed up the named hook.
116 *
117 *
118 * When this structure is accepted by the NGM_PPPOE_OFFER command:
119 * The AC-NAme field is set from that given and a PADI
120 * packet is expected to arrive from the session control daemon, on the
121 * named hook. The session will then issue the appropriate PADO
122 * and begin negotiation.
123 */
124 struct ngpppoe_init_data {
125 char hook[NG_HOOKSIZ]; /* hook to monitor on */
126 u_int16_t data_len; /* Length of the service name */
127 char data[0]; /* init data goes here */
128 };
129
130 /* Keep this in sync with the above structure definition */
131 #define NG_PPPOE_INIT_DATA_TYPE_INFO { \
132 { "hook", &ng_parse_hookbuf_type }, \
133 { "data", &ng_parse_sizedstring_type }, \
134 { NULL } \
135 }
136
137 /*
138 * This structure is used by the asychronous success and failure messages.
139 * (to report which hook has failed or connected). The message is sent
140 * to whoever requested the connection. (close may use this too).
141 */
142 struct ngpppoe_sts {
143 char hook[NG_HOOKSIZ]; /* hook associated with event session */
144 };
145
146 /* Keep this in sync with the above structure definition */
147 #define NG_PPPOE_STS_TYPE_INFO { \
148 { "hook", &ng_parse_hookbuf_type }, \
149 { NULL } \
150 }
151
152
153 /********************************************************************
154 * Constants and definitions specific to pppoe
155 ********************************************************************/
156
157 #define PPPOE_TIMEOUT_LIMIT 64
158 #define PPPOE_OFFER_TIMEOUT 16
159 #define PPPOE_INITIAL_TIMEOUT 2
160
161 /* Codes to identify message types */
162 #define PADI_CODE 0x09
163 #define PADO_CODE 0x07
164 #define PADR_CODE 0x19
165 #define PADS_CODE 0x65
166 #define PADT_CODE 0xa7
167
168 /* Tag identifiers */
169 #if BYTE_ORDER == BIG_ENDIAN
170 #define PTT_EOL (0x0000)
171 #define PTT_SRV_NAME (0x0101)
172 #define PTT_AC_NAME (0x0102)
173 #define PTT_HOST_UNIQ (0x0103)
174 #define PTT_AC_COOKIE (0x0104)
175 #define PTT_VENDOR (0x0105)
176 #define PTT_RELAY_SID (0x0110)
177 #define PTT_SRV_ERR (0x0201)
178 #define PTT_SYS_ERR (0x0202)
179 #define PTT_GEN_ERR (0x0203)
180
181 #define ETHERTYPE_PPPOE_DISC 0x8863 /* pppoe discovery packets */
182 #define ETHERTYPE_PPPOE_SESS 0x8864 /* pppoe session packets */
183 #define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
184 #define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets 3com? */
185 #else
186 #define PTT_EOL (0x0000)
187 #define PTT_SRV_NAME (0x0101)
188 #define PTT_AC_NAME (0x0201)
189 #define PTT_HOST_UNIQ (0x0301)
190 #define PTT_AC_COOKIE (0x0401)
191 #define PTT_VENDOR (0x0501)
192 #define PTT_RELAY_SID (0x1001)
193 #define PTT_SRV_ERR (0x0102)
194 #define PTT_SYS_ERR (0x0202)
195 #define PTT_GEN_ERR (0x0302)
196
197 #define ETHERTYPE_PPPOE_DISC 0x6388 /* pppoe discovery packets */
198 #define ETHERTYPE_PPPOE_SESS 0x6488 /* pppoe session packets */
199 #define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
200 #define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets 3com? */
201 #endif
202
203 struct pppoe_tag {
204 u_int16_t tag_type;
205 u_int16_t tag_len;
206 char tag_data[0];
207 }__packed;
208
209 struct pppoe_hdr{
210 u_int8_t ver:4;
211 u_int8_t type:4;
212 u_int8_t code;
213 u_int16_t sid;
214 u_int16_t length;
215 struct pppoe_tag tag[0];
216 }__packed;
217
218
219 struct pppoe_full_hdr {
220 struct ether_header eh;
221 struct pppoe_hdr ph;
222 }__packed;
223
224 union packet {
225 struct pppoe_full_hdr pkt_header;
226 u_int8_t bytes[2048];
227 };
228
229 struct datatag {
230 struct pppoe_tag hdr;
231 u_int8_t data[PPPOE_SERVICE_NAME_SIZE];
232 };
233
234
235 /*
236 * Define the order in which we will place tags in packets
237 * this may be ignored
238 */
239 /* for PADI */
240 #define TAGI_SVC 0
241 #define TAGI_HUNIQ 1
242 /* for PADO */
243 #define TAGO_ACNAME 0
244 #define TAGO_SVC 1
245 #define TAGO_COOKIE 2
246 #define TAGO_HUNIQ 3
247 /* for PADR */
248 #define TAGR_SVC 0
249 #define TAGR_HUNIQ 1
250 #define TAGR_COOKIE 2
251 /* for PADS */
252 #define TAGS_ACNAME 0
253 #define TAGS_SVC 1
254 #define TAGS_COOKIE 2
255 #define TAGS_HUNIQ 3
256 /* for PADT */
257
258 #endif /* _NETGRAPH_NG_PPPOE_H_ */
259
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