1 /* $NetBSD: if_gre.h,v 1.50 2021/12/03 13:27:39 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Heiko W.Rupp <hwr (at) pilhuhn.de> 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by David Young <dyoung (at) NetBSD.org> 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 * 34 * This material is based upon work partially supported by NSF 35 * under Contract No. NSF CNS-0626584. 36 */ 37 38 #ifndef _NET_IF_GRE_H_ 39 #define _NET_IF_GRE_H_ 40 41 #include <sys/ioccom.h> 42 #include <sys/evcnt.h> 43 #include <sys/queue.h> 44 #include <sys/mutex.h> 45 #include <sys/condvar.h> 46 #include <sys/malloc.h> 47 #include <sys/mallocvar.h> 48 49 #ifdef _KERNEL 50 51 #include <sys/pcq.h> 52 53 struct gre_soparm { 54 struct socket *sp_so; 55 struct sockaddr_storage sp_src; /* source of gre packets */ 56 struct sockaddr_storage sp_dst; /* destination of gre packets */ 57 int sp_type; /* encapsulating socket type */ 58 int sp_proto; /* encapsulating protocol */ 59 bool sp_bysock; /* encapsulation configured by passing 60 * socket, not by SIOCSLIFPHYADDR 61 */ 62 }; 63 64 enum gre_state { 65 GRE_S_IDLE = 0 66 , GRE_S_IOCTL 67 , GRE_S_DIE 68 }; 69 70 struct gre_bufq { 71 pcq_t *bq_q; 72 volatile int bq_drops; 73 }; 74 75 enum gre_msg { 76 GRE_M_NONE = 0 77 , GRE_M_SETFP 78 , GRE_M_DELFP 79 , GRE_M_STOP 80 , GRE_M_OK 81 , GRE_M_ERR 82 }; 83 84 struct gre_softc { 85 struct ifnet sc_if; 86 kmutex_t sc_mtx; 87 kcondvar_t sc_condvar; 88 kcondvar_t sc_fp_condvar; 89 struct gre_bufq sc_snd; 90 struct gre_soparm sc_soparm; 91 volatile enum gre_state sc_state; 92 volatile int sc_waiters; 93 volatile int sc_fp_waiters; 94 void *sc_si; 95 96 struct evcnt sc_recv_ev; 97 struct evcnt sc_send_ev; 98 99 struct evcnt sc_block_ev; 100 struct evcnt sc_error_ev; 101 struct evcnt sc_pullup_ev; 102 struct evcnt sc_unsupp_ev; 103 struct evcnt sc_oflow_ev; 104 file_t * volatile sc_fp; 105 volatile enum gre_msg sc_msg; 106 int sc_fd; 107 }; 108 109 struct gre_h { 110 uint16_t flags; /* GRE flags */ 111 uint16_t ptype; /* protocol type of payload typically 112 * ethernet protocol type 113 */ 114 /* 115 * from here on: fields are optional, presence indicated by flags 116 * 117 u_int_16 checksum checksum (one-complements of GRE header 118 and payload 119 Present if (ck_pres | rt_pres == 1). 120 Valid if (ck_pres == 1). 121 u_int_16 offset offset from start of routing field to 122 first octet of active SRE (see below). 123 Present if (ck_pres | rt_pres == 1). 124 Valid if (rt_pres == 1). 125 u_int_32 key inserted by encapsulator e.g. for 126 authentication 127 Present if (key_pres ==1 ). 128 u_int_32 seq_num Sequence number to allow for packet order 129 Present if (seq_pres ==1 ). 130 struct gre_sre[] routing Routing fields (see below) 131 Present if (rt_pres == 1) 132 */ 133 }; 134 #define GRE_CP 0x8000 /* Checksum Present */ 135 #define GRE_RP 0x4000 /* Routing Present */ 136 #define GRE_KP 0x2000 /* Key Present */ 137 #define GRE_SP 0x1000 /* Sequence Present */ 138 #define GRE_SS 0x0800 /* Strict Source Route */ 139 140 /* 141 * gre_sre defines a Source route Entry. These are needed if packets 142 * should be routed over more than one tunnel hop by hop 143 */ 144 struct gre_sre { 145 uint16_t sre_family; /* address family */ 146 u_char sre_offset; /* offset to first octet of active entry */ 147 u_char sre_length; /* number of octets in the SRE. 148 sre_lengthl==0 -> last entry. */ 149 u_char *sre_rtinfo; /* the routing information */ 150 }; 151 152 #define GRE_TTL 30 153 extern int ip_gre_ttl; 154 #endif /* _KERNEL */ 155 156 /* 157 * ioctls needed to manipulate the interface 158 */ 159 160 #define GRESADDRS _IOW('i', 101, struct ifreq) 161 #define GRESADDRD _IOW('i', 102, struct ifreq) 162 #define GREGADDRS _IOWR('i', 103, struct ifreq) 163 #define GREGADDRD _IOWR('i', 104, struct ifreq) 164 #define GRESPROTO _IOW('i', 105, struct ifreq) 165 #define GREGPROTO _IOWR('i', 106, struct ifreq) 166 #define GRESSOCK _IOW('i', 107, struct ifreq) 167 #define GREDSOCK _IOW('i', 108, struct ifreq) 168 169 #endif /* !_NET_IF_GRE_H_ */ 170
Indexes created Sat Sep 20 22:09:52 GMT 2025