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pppoe.h
1 /*****************************************************************************
2 * /@code
3 *
4 * pppoe.h - PPP Over Ethernet implementation for lwIP.
5 *
6 * Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
7 *
8 * The authors hereby grant permission to use, copy, modify, distribute,
9 * and license this software and its documentation for any purpose, provided
10 * that existing copyright notices are retained in all copies and that this
11 * notice and the following disclaimer are included verbatim in any
12 * distributions. No written agreement, license, or royalty fee is required
13 * for any of the authorized uses.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 ******************************************************************************
27 * REVISION HISTORY
28 *
29 * 06-01-01 Marc Boucher <marc@mbsi.ca>
30 * Ported to lwIP.
31 *
32 * /@endcode
33 *****************************************************************************/
34 
35 
36 
37 /* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
38 
39 /*-
40  * Copyright (c) 2002 The NetBSD Foundation, Inc.
41  * All rights reserved.
42  *
43  * This code is derived from software contributed to The NetBSD Foundation
44  * by Martin Husemann <martin@NetBSD.org>.
45  *
46  * Redistribution and use in source and binary forms, with or without
47  * modification, are permitted provided that the following conditions
48  * are met:
49  * 1. Redistributions of source code must retain the above copyright
50  * notice, this list of conditions and the following disclaimer.
51  * 2. Redistributions in binary form must reproduce the above copyright
52  * notice, this list of conditions and the following disclaimer in the
53  * documentation and/or other materials provided with the distribution.
54  * 3. All advertising materials mentioning features or use of this software
55  * must display the following acknowledgement:
56  * This product includes software developed by the NetBSD
57  * Foundation, Inc. and its contributors.
58  * 4. Neither the name of The NetBSD Foundation nor the names of its
59  * contributors may be used to endorse or promote products derived
60  * from this software without specific prior written permission.
61  *
62  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
63  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
64  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
65  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
66  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
67  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
68  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
69  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
70  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
71  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
72  * POSSIBILITY OF SUCH DAMAGE.
73  */
74 #include "ppp_opts.h"
75 #if PPP_SUPPORT && PPPOE_SUPPORT /* don't build if not configured for use in ppp_opts.h */
76 
77 #ifndef PPP_OE_H
78 #define PPP_OE_H
79 
80 #include "ppp.h"
81 
82 #ifdef __cplusplus
83 extern "C" {
84 #endif
85 
86 #ifdef PACK_STRUCT_USE_INCLUDES
87 # include "arch/bpstruct.h"
88 #endif
89 PACK_STRUCT_BEGIN
90 struct pppoehdr {
91  PACK_STRUCT_FLD_8(u8_t vertype);
92  PACK_STRUCT_FLD_8(u8_t code);
93  PACK_STRUCT_FIELD(u16_t session);
94  PACK_STRUCT_FIELD(u16_t plen);
95 } PACK_STRUCT_STRUCT;
96 PACK_STRUCT_END
97 #ifdef PACK_STRUCT_USE_INCLUDES
98 # include "arch/epstruct.h"
99 #endif
100 
101 #ifdef PACK_STRUCT_USE_INCLUDES
102 # include "arch/bpstruct.h"
103 #endif
104 PACK_STRUCT_BEGIN
105 struct pppoetag {
106  PACK_STRUCT_FIELD(u16_t tag);
107  PACK_STRUCT_FIELD(u16_t len);
108 } PACK_STRUCT_STRUCT;
109 PACK_STRUCT_END
110 #ifdef PACK_STRUCT_USE_INCLUDES
111 # include "arch/epstruct.h"
112 #endif
113 
114 
115 #define PPPOE_STATE_INITIAL 0
116 #define PPPOE_STATE_PADI_SENT 1
117 #define PPPOE_STATE_PADR_SENT 2
118 #define PPPOE_STATE_SESSION 3
119 /* passive */
120 #define PPPOE_STATE_PADO_SENT 1
121 
122 #define PPPOE_HEADERLEN sizeof(struct pppoehdr)
123 #define PPPOE_VERTYPE 0x11 /* VER=1, TYPE = 1 */
124 
125 #define PPPOE_TAG_EOL 0x0000 /* end of list */
126 #define PPPOE_TAG_SNAME 0x0101 /* service name */
127 #define PPPOE_TAG_ACNAME 0x0102 /* access concentrator name */
128 #define PPPOE_TAG_HUNIQUE 0x0103 /* host unique */
129 #define PPPOE_TAG_ACCOOKIE 0x0104 /* AC cookie */
130 #define PPPOE_TAG_VENDOR 0x0105 /* vendor specific */
131 #define PPPOE_TAG_RELAYSID 0x0110 /* relay session id */
132 #define PPPOE_TAG_SNAME_ERR 0x0201 /* service name error */
133 #define PPPOE_TAG_ACSYS_ERR 0x0202 /* AC system error */
134 #define PPPOE_TAG_GENERIC_ERR 0x0203 /* gerneric error */
135 
136 #define PPPOE_CODE_PADI 0x09 /* Active Discovery Initiation */
137 #define PPPOE_CODE_PADO 0x07 /* Active Discovery Offer */
138 #define PPPOE_CODE_PADR 0x19 /* Active Discovery Request */
139 #define PPPOE_CODE_PADS 0x65 /* Active Discovery Session confirmation */
140 #define PPPOE_CODE_PADT 0xA7 /* Active Discovery Terminate */
141 
142 #ifndef PPPOE_MAX_AC_COOKIE_LEN
143 #define PPPOE_MAX_AC_COOKIE_LEN 64
144 #endif
145 
146 struct pppoe_softc {
147  struct pppoe_softc *next;
148  struct netif *sc_ethif; /* ethernet interface we are using */
149  ppp_pcb *pcb; /* PPP PCB */
150 
151  struct eth_addr sc_dest; /* hardware address of concentrator */
152  u16_t sc_session; /* PPPoE session id */
153  u8_t sc_state; /* discovery phase or session connected */
154 
155 #ifdef PPPOE_TODO
156  u8_t *sc_service_name; /* if != NULL: requested name of service */
157  u8_t *sc_concentrator_name; /* if != NULL: requested concentrator id */
158 #endif /* PPPOE_TODO */
159  u8_t sc_ac_cookie[PPPOE_MAX_AC_COOKIE_LEN]; /* content of AC cookie we must echo back */
160  u8_t sc_ac_cookie_len; /* length of cookie data */
161 #ifdef PPPOE_SERVER
162  u8_t *sc_hunique; /* content of host unique we must echo back */
163  u8_t sc_hunique_len; /* length of host unique */
164 #endif
165  u8_t sc_padi_retried; /* number of PADI retries already done */
166  u8_t sc_padr_retried; /* number of PADR retries already done */
167 };
168 
169 
170 #define pppoe_init() /* compatibility define, no initialization needed */
171 
172 ppp_pcb *pppoe_create(struct netif *pppif,
173  struct netif *ethif,
174  const char *service_name, const char *concentrator_name,
175  ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
176 
177 /*
178  * Functions called from stack
179  * DO NOT CALL FROM stack USER APPLICATION.
180  */
181 void pppoe_disc_input(struct netif *netif, struct pbuf *p);
182 void pppoe_data_input(struct netif *netif, struct pbuf *p);
183 
184 #ifdef __cplusplus
185 }
186 #endif
187 
188 #endif /* PPP_OE_H */
189 
190 #endif /* PPP_SUPPORT && PPPOE_SUPPORT */
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