1 | /*- |
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2 | * Copyright (c) 1998 The NetBSD Foundation, Inc. |
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3 | * Copyright (c) 2014 Andrey V. Elsukov <ae@FreeBSD.org> |
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4 | * All rights reserved |
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5 | * |
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6 | * This code is derived from software contributed to The NetBSD Foundation |
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7 | * by Heiko W.Rupp <hwr@pilhuhn.de> |
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8 | * |
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9 | * Redistribution and use in source and binary forms, with or without |
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10 | * modification, are permitted provided that the following conditions |
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11 | * are met: |
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12 | * 1. Redistributions of source code must retain the above copyright |
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13 | * notice, this list of conditions and the following disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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19 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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20 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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21 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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22 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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28 | * POSSIBILITY OF SUCH DAMAGE. |
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29 | * |
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30 | * $NetBSD: if_gre.h,v 1.13 2003/11/10 08:51:52 wiz Exp $ |
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31 | * $FreeBSD$ |
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32 | */ |
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33 | |
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34 | #ifndef _NET_IF_GRE_H_ |
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35 | #define _NET_IF_GRE_H_ |
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36 | |
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37 | #ifdef _KERNEL |
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38 | /* GRE header according to RFC 2784 and RFC 2890 */ |
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39 | struct grehdr { |
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40 | uint16_t gre_flags; /* GRE flags */ |
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41 | #define GRE_FLAGS_CP 0x8000 /* checksum present */ |
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42 | #define GRE_FLAGS_KP 0x2000 /* key present */ |
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43 | #define GRE_FLAGS_SP 0x1000 /* sequence present */ |
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44 | #define GRE_FLAGS_MASK (GRE_FLAGS_CP|GRE_FLAGS_KP|GRE_FLAGS_SP) |
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45 | uint16_t gre_proto; /* protocol type */ |
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46 | uint32_t gre_opts[0]; /* optional fields */ |
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47 | } __packed; |
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48 | |
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49 | #ifdef INET |
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50 | struct greip { |
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51 | struct ip gi_ip; |
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52 | struct grehdr gi_gre; |
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53 | } __packed; |
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54 | #endif |
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55 | |
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56 | #ifdef INET6 |
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57 | struct greip6 { |
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58 | struct ip6_hdr gi6_ip6; |
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59 | struct grehdr gi6_gre; |
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60 | } __packed; |
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61 | #endif |
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62 | |
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63 | struct gre_softc { |
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64 | struct ifnet *gre_ifp; |
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65 | LIST_ENTRY(gre_softc) gre_list; |
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66 | struct rmlock gre_lock; |
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67 | int gre_family; /* AF of delivery header */ |
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68 | uint32_t gre_iseq; |
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69 | uint32_t gre_oseq; |
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70 | uint32_t gre_key; |
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71 | uint32_t gre_options; |
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72 | uint32_t gre_mtu; |
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73 | u_int gre_fibnum; |
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74 | u_int gre_hlen; /* header size */ |
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75 | union { |
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76 | void *hdr; |
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77 | #ifdef INET |
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78 | struct greip *gihdr; |
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79 | #endif |
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80 | #ifdef INET6 |
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81 | struct greip6 *gi6hdr; |
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82 | #endif |
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83 | } gre_uhdr; |
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84 | const struct encaptab *gre_ecookie; |
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85 | }; |
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86 | #define GRE2IFP(sc) ((sc)->gre_ifp) |
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87 | #define GRE_LOCK_INIT(sc) rm_init(&(sc)->gre_lock, "gre softc") |
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88 | #define GRE_LOCK_DESTROY(sc) rm_destroy(&(sc)->gre_lock) |
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89 | #define GRE_RLOCK_TRACKER struct rm_priotracker gre_tracker |
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90 | #define GRE_RLOCK(sc) rm_rlock(&(sc)->gre_lock, &gre_tracker) |
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91 | #define GRE_RUNLOCK(sc) rm_runlock(&(sc)->gre_lock, &gre_tracker) |
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92 | #define GRE_RLOCK_ASSERT(sc) rm_assert(&(sc)->gre_lock, RA_RLOCKED) |
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93 | #define GRE_WLOCK(sc) rm_wlock(&(sc)->gre_lock) |
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94 | #define GRE_WUNLOCK(sc) rm_wunlock(&(sc)->gre_lock) |
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95 | #define GRE_WLOCK_ASSERT(sc) rm_assert(&(sc)->gre_lock, RA_WLOCKED) |
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96 | |
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97 | #define gre_hdr gre_uhdr.hdr |
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98 | #define gre_gihdr gre_uhdr.gihdr |
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99 | #define gre_gi6hdr gre_uhdr.gi6hdr |
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100 | #define gre_oip gre_gihdr->gi_ip |
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101 | #define gre_oip6 gre_gi6hdr->gi6_ip6 |
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102 | |
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103 | int gre_input(struct mbuf **, int *, int); |
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104 | #ifdef INET |
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105 | int in_gre_attach(struct gre_softc *); |
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106 | int in_gre_output(struct mbuf *, int, int); |
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107 | #endif |
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108 | #ifdef INET6 |
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109 | int in6_gre_attach(struct gre_softc *); |
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110 | int in6_gre_output(struct mbuf *, int, int); |
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111 | #endif |
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112 | /* |
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113 | * CISCO uses special type for GRE tunnel created as part of WCCP |
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114 | * connection, while in fact those packets are just IPv4 encapsulated |
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115 | * into GRE. |
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116 | */ |
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117 | #define ETHERTYPE_WCCP 0x883E |
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118 | #endif /* _KERNEL */ |
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119 | |
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120 | #define GRESADDRS _IOW('i', 101, struct ifreq) |
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121 | #define GRESADDRD _IOW('i', 102, struct ifreq) |
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122 | #define GREGADDRS _IOWR('i', 103, struct ifreq) |
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123 | #define GREGADDRD _IOWR('i', 104, struct ifreq) |
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124 | #define GRESPROTO _IOW('i' , 105, struct ifreq) |
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125 | #define GREGPROTO _IOWR('i', 106, struct ifreq) |
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126 | |
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127 | #define GREGKEY _IOWR('i', 107, struct ifreq) |
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128 | #define GRESKEY _IOW('i', 108, struct ifreq) |
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129 | #define GREGOPTS _IOWR('i', 109, struct ifreq) |
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130 | #define GRESOPTS _IOW('i', 110, struct ifreq) |
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131 | |
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132 | #define GRE_ENABLE_CSUM 0x0001 |
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133 | #define GRE_ENABLE_SEQ 0x0002 |
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134 | #define GRE_OPTMASK (GRE_ENABLE_CSUM|GRE_ENABLE_SEQ) |
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135 | |
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136 | #endif /* _NET_IF_GRE_H_ */ |
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