3
4/*
5 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * All rights reserved
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Heiko W.Rupp <hwr@pilhuhn.de>
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#ifndef _NET_IF_GRE_H
41#define _NET_IF_GRE_H
42
43#include <sys/ioccom.h>
44#ifdef _KERNEL
45#include <sys/queue.h>
46
47/*
48 * Version of the WCCP, need to be configured manually since
49 * header for version 2 is the same but IP payload is prepended
50 * with additional 4-bytes field.
51 */
52typedef enum {
53 WCCP_V1 = 0,
54 WCCP_V2
55} wccp_ver_t;
56
57struct gre_softc {
58 struct ifnet sc_if;
59 LIST_ENTRY(gre_softc) sc_list;
60 int gre_unit;
61 int gre_flags;
62 struct in_addr g_src; /* source address of gre packets */
63 struct in_addr g_dst; /* destination address of gre packets */
64 struct route route; /* routing entry that determines, where a
65 encapsulated packet should go */
66 u_char g_proto; /* protocol of encapsulator */
67
68 const struct encaptab *encap; /* encapsulation cookie */
69
70 int called; /* infinite recursion preventer */
71
72 wccp_ver_t wccp_ver; /* version of the WCCP */
73};
74
75
76struct gre_h {
77 u_int16_t flags; /* GRE flags */
78 u_int16_t ptype; /* protocol type of payload typically
79 Ether protocol type*/
80/*
81 * from here on: fields are optional, presence indicated by flags
82 *
83 u_int_16 checksum checksum (one-complements of GRE header
84 and payload
85 Present if (ck_pres | rt_pres == 1).
86 Valid if (ck_pres == 1).
87 u_int_16 offset offset from start of routing filed to
88 first octet of active SRE (see below).
89 Present if (ck_pres | rt_pres == 1).
90 Valid if (rt_pres == 1).
91 u_int_32 key inserted by encapsulator e.g. for
92 authentication
93 Present if (key_pres ==1 ).
94 u_int_32 seq_num Sequence number to allow for packet order
95 Present if (seq_pres ==1 ).
96 struct gre_sre[] routing Routing fileds (see below)
97 Present if (rt_pres == 1)
98 */
99} __packed;
100
101struct greip {
102 struct ip gi_i;
103 struct gre_h gi_g;
104} __packed;
105
106#define gi_pr gi_i.ip_p
107#define gi_len gi_i.ip_len
108#define gi_src gi_i.ip_src
109#define gi_dst gi_i.ip_dst
110#define gi_ptype gi_g.ptype
111#define gi_flags gi_g.flags
112
113#define GRE_CP 0x8000 /* Checksum Present */
114#define GRE_RP 0x4000 /* Routing Present */
115#define GRE_KP 0x2000 /* Key Present */
116#define GRE_SP 0x1000 /* Sequence Present */
117#define GRE_SS 0x0800 /* Strict Source Route */
118
119/*
120 * CISCO uses special type for GRE tunnel created as part of WCCP
121 * connection, while in fact those packets are just IPv4 encapsulated
122 * into GRE.
123 */
124#define WCCP_PROTOCOL_TYPE 0x883E
125
126/*
127 * gre_sre defines a Source route Entry. These are needed if packets
128 * should be routed over more than one tunnel hop by hop
129 */
130struct gre_sre {
131 u_int16_t sre_family; /* address family */
132 u_char sre_offset; /* offset to first octet of active entry */
133 u_char sre_length; /* number of octets in the SRE.
134 sre_lengthl==0 -> last entry. */
135 u_char *sre_rtinfo; /* the routing information */
136};
137
138struct greioctl {
139 int unit;
140 struct in_addr addr;
141};
142
143/* for mobile encaps */
144
145struct mobile_h {
146 u_int16_t proto; /* protocol and S-bit */
147 u_int16_t hcrc; /* header checksum */
148 u_int32_t odst; /* original destination address */
149 u_int32_t osrc; /* original source addr, if S-bit set */
150} __packed;
151
152struct mobip_h {
153 struct ip mi;
154 struct mobile_h mh;
155} __packed;
156
157
158#define MOB_H_SIZ_S (sizeof(struct mobile_h) - sizeof(u_int32_t))
159#define MOB_H_SIZ_L (sizeof(struct mobile_h))
160#define MOB_H_SBIT 0x0080
161
162#define GRE_TTL 30
163
164#endif /* _KERNEL */
165
166/*
167 * ioctls needed to manipulate the interface
168 */
169
170#define GRESADDRS _IOW('i', 101, struct ifreq)
171#define GRESADDRD _IOW('i', 102, struct ifreq)
172#define GREGADDRS _IOWR('i', 103, struct ifreq)
173#define GREGADDRD _IOWR('i', 104, struct ifreq)
174#define GRESPROTO _IOW('i' , 105, struct ifreq)
175#define GREGPROTO _IOWR('i', 106, struct ifreq)
176
177#ifdef _KERNEL
178LIST_HEAD(gre_softc_head, gre_softc);
| 3
4/*
5 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * All rights reserved
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Heiko W.Rupp <hwr@pilhuhn.de>
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#ifndef _NET_IF_GRE_H
41#define _NET_IF_GRE_H
42
43#include <sys/ioccom.h>
44#ifdef _KERNEL
45#include <sys/queue.h>
46
47/*
48 * Version of the WCCP, need to be configured manually since
49 * header for version 2 is the same but IP payload is prepended
50 * with additional 4-bytes field.
51 */
52typedef enum {
53 WCCP_V1 = 0,
54 WCCP_V2
55} wccp_ver_t;
56
57struct gre_softc {
58 struct ifnet sc_if;
59 LIST_ENTRY(gre_softc) sc_list;
60 int gre_unit;
61 int gre_flags;
62 struct in_addr g_src; /* source address of gre packets */
63 struct in_addr g_dst; /* destination address of gre packets */
64 struct route route; /* routing entry that determines, where a
65 encapsulated packet should go */
66 u_char g_proto; /* protocol of encapsulator */
67
68 const struct encaptab *encap; /* encapsulation cookie */
69
70 int called; /* infinite recursion preventer */
71
72 wccp_ver_t wccp_ver; /* version of the WCCP */
73};
74
75
76struct gre_h {
77 u_int16_t flags; /* GRE flags */
78 u_int16_t ptype; /* protocol type of payload typically
79 Ether protocol type*/
80/*
81 * from here on: fields are optional, presence indicated by flags
82 *
83 u_int_16 checksum checksum (one-complements of GRE header
84 and payload
85 Present if (ck_pres | rt_pres == 1).
86 Valid if (ck_pres == 1).
87 u_int_16 offset offset from start of routing filed to
88 first octet of active SRE (see below).
89 Present if (ck_pres | rt_pres == 1).
90 Valid if (rt_pres == 1).
91 u_int_32 key inserted by encapsulator e.g. for
92 authentication
93 Present if (key_pres ==1 ).
94 u_int_32 seq_num Sequence number to allow for packet order
95 Present if (seq_pres ==1 ).
96 struct gre_sre[] routing Routing fileds (see below)
97 Present if (rt_pres == 1)
98 */
99} __packed;
100
101struct greip {
102 struct ip gi_i;
103 struct gre_h gi_g;
104} __packed;
105
106#define gi_pr gi_i.ip_p
107#define gi_len gi_i.ip_len
108#define gi_src gi_i.ip_src
109#define gi_dst gi_i.ip_dst
110#define gi_ptype gi_g.ptype
111#define gi_flags gi_g.flags
112
113#define GRE_CP 0x8000 /* Checksum Present */
114#define GRE_RP 0x4000 /* Routing Present */
115#define GRE_KP 0x2000 /* Key Present */
116#define GRE_SP 0x1000 /* Sequence Present */
117#define GRE_SS 0x0800 /* Strict Source Route */
118
119/*
120 * CISCO uses special type for GRE tunnel created as part of WCCP
121 * connection, while in fact those packets are just IPv4 encapsulated
122 * into GRE.
123 */
124#define WCCP_PROTOCOL_TYPE 0x883E
125
126/*
127 * gre_sre defines a Source route Entry. These are needed if packets
128 * should be routed over more than one tunnel hop by hop
129 */
130struct gre_sre {
131 u_int16_t sre_family; /* address family */
132 u_char sre_offset; /* offset to first octet of active entry */
133 u_char sre_length; /* number of octets in the SRE.
134 sre_lengthl==0 -> last entry. */
135 u_char *sre_rtinfo; /* the routing information */
136};
137
138struct greioctl {
139 int unit;
140 struct in_addr addr;
141};
142
143/* for mobile encaps */
144
145struct mobile_h {
146 u_int16_t proto; /* protocol and S-bit */
147 u_int16_t hcrc; /* header checksum */
148 u_int32_t odst; /* original destination address */
149 u_int32_t osrc; /* original source addr, if S-bit set */
150} __packed;
151
152struct mobip_h {
153 struct ip mi;
154 struct mobile_h mh;
155} __packed;
156
157
158#define MOB_H_SIZ_S (sizeof(struct mobile_h) - sizeof(u_int32_t))
159#define MOB_H_SIZ_L (sizeof(struct mobile_h))
160#define MOB_H_SBIT 0x0080
161
162#define GRE_TTL 30
163
164#endif /* _KERNEL */
165
166/*
167 * ioctls needed to manipulate the interface
168 */
169
170#define GRESADDRS _IOW('i', 101, struct ifreq)
171#define GRESADDRD _IOW('i', 102, struct ifreq)
172#define GREGADDRS _IOWR('i', 103, struct ifreq)
173#define GREGADDRD _IOWR('i', 104, struct ifreq)
174#define GRESPROTO _IOW('i' , 105, struct ifreq)
175#define GREGPROTO _IOWR('i', 106, struct ifreq)
176
177#ifdef _KERNEL
178LIST_HEAD(gre_softc_head, gre_softc);
|