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/5.3/sys/netgraph/ng_pppoe.h 136588 2004-10-16 08:43:07Z cvs2svn $
40 * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
41 */
42
43 #ifndef _NETGRAPH_NG_PPPOE_H_
44 #define _NETGRAPH_NG_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 1089893072
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 /* Mode names */
66 #define NG_PPPOE_STANDARD "standard"
67 #define NG_PPPOE_NONSTANDARD "3Com"
68
69 /**********************************************************************
70 * Netgraph commands understood by this node type.
71 * FAIL, SUCCESS, CLOSE and ACNAME are sent by the node rather than received.
72 ********************************************************************/
73 enum cmd {
74 NGM_PPPOE_SET_FLAG = 1,
75 NGM_PPPOE_CONNECT = 2, /* Client, Try find this service */
76 NGM_PPPOE_LISTEN = 3, /* Server, Await a request for this service */
77 NGM_PPPOE_OFFER = 4, /* Server, hook X should respond (*) */
78 NGM_PPPOE_SUCCESS = 5, /* State machine connected */
79 NGM_PPPOE_FAIL = 6, /* State machine could not connect */
80 NGM_PPPOE_CLOSE = 7, /* Session closed down */
81 NGM_PPPOE_SERVICE = 8, /* additional Service to advertise (in PADO) */
82 NGM_PPPOE_ACNAME = 9, /* AC_NAME for informational purposes */
83 NGM_PPPOE_GET_STATUS = 10, /* data in/out */
84 NGM_PPPOE_SESSIONID = 11, /* Session_ID for informational purposes */
85 NGM_PPPOE_SETMODE = 12, /* set to standard or 3Com mode */
86 NGM_PPPOE_GETMODE = 13, /* see current mode */
87 };
88
89 /***********************
90 * Structures passed in the various netgraph command messages.
91 ***********************/
92 /* This structure is returned by the NGM_PPPOE_GET_STATUS command */
93 struct ngpppoestat {
94 u_int packets_in; /* packets in from ethernet */
95 u_int packets_out; /* packets out towards ethernet */
96 };
97
98 /* Keep this in sync with the above structure definition */
99 #define NG_PPPOESTAT_TYPE_INFO { \
100 { "packets_in", &ng_parse_uint_type }, \
101 { "packets_out", &ng_parse_uint_type }, \
102 { NULL } \
103 }
104
105 /*
106 * When this structure is accepted by the NGM_PPPOE_CONNECT command :
107 * The data field is MANDATORY.
108 * The session sends out a PADI request for the named service.
109 *
110 *
111 * When this structure is accepted by the NGM_PPPOE_LISTEN command.
112 * If no service is given this is assumed to accept ALL PADI requests.
113 * This may at some time take a regexp expression, but not yet.
114 * Matching PADI requests will be passed up the named hook.
115 *
116 *
117 * When this structure is accepted by the NGM_PPPOE_OFFER command:
118 * The AC-NAme field is set from that given and a PADI
119 * packet is expected to arrive from the session control daemon, on the
120 * named hook. The session will then issue the appropriate PADO
121 * and begin negotiation.
122 */
123 struct ngpppoe_init_data {
124 char hook[NG_HOOKSIZ]; /* hook to monitor on */
125 u_int16_t data_len; /* Length of the service name */
126 char data[0]; /* init data goes here */
127 };
128
129 /* Keep this in sync with the above structure definition */
130 #define NG_PPPOE_INIT_DATA_TYPE_INFO { \
131 { "hook", &ng_parse_hookbuf_type }, \
132 { "data", &ng_parse_sizedstring_type }, \
133 { NULL } \
134 }
135
136 /*
137 * This structure is used by the asychronous success and failure messages.
138 * (to report which hook has failed or connected). The message is sent
139 * to whoever requested the connection. (close may use this too).
140 */
141 struct ngpppoe_sts {
142 char hook[NG_HOOKSIZ]; /* hook associated with event session */
143 };
144
145 /* Keep this in sync with the above structure definition */
146 #define NG_PPPOE_STS_TYPE_INFO { \
147 { "hook", &ng_parse_hookbuf_type }, \
148 { NULL } \
149 }
150
151
152 /********************************************************************
153 * Constants and definitions specific to pppoe
154 ********************************************************************/
155
156 #define PPPOE_TIMEOUT_LIMIT 64
157 #define PPPOE_OFFER_TIMEOUT 16
158 #define PPPOE_INITIAL_TIMEOUT 2
159
160 /* Codes to identify message types */
161 #define PADI_CODE 0x09
162 #define PADO_CODE 0x07
163 #define PADR_CODE 0x19
164 #define PADS_CODE 0x65
165 #define PADT_CODE 0xa7
166
167 /* Tag identifiers */
168 #if BYTE_ORDER == BIG_ENDIAN
169 #define PTT_EOL (0x0000)
170 #define PTT_SRV_NAME (0x0101)
171 #define PTT_AC_NAME (0x0102)
172 #define PTT_HOST_UNIQ (0x0103)
173 #define PTT_AC_COOKIE (0x0104)
174 #define PTT_VENDOR (0x0105)
175 #define PTT_RELAY_SID (0x0110)
176 #define PTT_SRV_ERR (0x0201)
177 #define PTT_SYS_ERR (0x0202)
178 #define PTT_GEN_ERR (0x0203)
179
180 #define ETHERTYPE_PPPOE_DISC 0x8863 /* pppoe discovery packets */
181 #define ETHERTYPE_PPPOE_SESS 0x8864 /* pppoe session packets */
182 #define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
183 #define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets 3com? */
184 #else
185 #define PTT_EOL (0x0000)
186 #define PTT_SRV_NAME (0x0101)
187 #define PTT_AC_NAME (0x0201)
188 #define PTT_HOST_UNIQ (0x0301)
189 #define PTT_AC_COOKIE (0x0401)
190 #define PTT_VENDOR (0x0501)
191 #define PTT_RELAY_SID (0x1001)
192 #define PTT_SRV_ERR (0x0102)
193 #define PTT_SYS_ERR (0x0202)
194 #define PTT_GEN_ERR (0x0302)
195
196 #define ETHERTYPE_PPPOE_DISC 0x6388 /* pppoe discovery packets */
197 #define ETHERTYPE_PPPOE_SESS 0x6488 /* pppoe session packets */
198 #define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
199 #define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets 3com? */
200 #endif
201
202 struct pppoe_tag {
203 u_int16_t tag_type;
204 u_int16_t tag_len;
205 char tag_data[0];
206 }__packed;
207
208 struct pppoe_hdr{
209 u_int8_t ver:4;
210 u_int8_t type:4;
211 u_int8_t code;
212 u_int16_t sid;
213 u_int16_t length;
214 struct pppoe_tag tag[0];
215 }__packed;
216
217
218 struct pppoe_full_hdr {
219 struct ether_header eh;
220 struct pppoe_hdr ph;
221 }__packed;
222
223 union packet {
224 struct pppoe_full_hdr pkt_header;
225 u_int8_t bytes[2048];
226 };
227
228 struct datatag {
229 struct pppoe_tag hdr;
230 u_int8_t data[PPPOE_SERVICE_NAME_SIZE];
231 };
232
233
234 /*
235 * Define the order in which we will place tags in packets
236 * this may be ignored
237 */
238 /* for PADI */
239 #define TAGI_SVC 0
240 #define TAGI_HUNIQ 1
241 /* for PADO */
242 #define TAGO_ACNAME 0
243 #define TAGO_SVC 1
244 #define TAGO_COOKIE 2
245 #define TAGO_HUNIQ 3
246 /* for PADR */
247 #define TAGR_SVC 0
248 #define TAGR_HUNIQ 1
249 #define TAGR_COOKIE 2
250 /* for PADS */
251 #define TAGS_ACNAME 0
252 #define TAGS_SVC 1
253 #define TAGS_COOKIE 2
254 #define TAGS_HUNIQ 3
255 /* for PADT */
256
257 #endif /* _NETGRAPH_NG_PPPOE_H_ */
258
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