if_gre.h revision 1.39.14.1
1 /* $NetBSD: if_gre.h,v 1.39.14.1 2010/08/17 06:47:44 uebayasi 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/evcnt.h> 42 #include <sys/queue.h> 43 #include <sys/mutex.h> 44 #include <sys/condvar.h> 45 #include <sys/malloc.h> 46 #include <sys/mallocvar.h> 47 48 #ifdef _KERNEL 49 struct gre_soparm { 50 struct socket *sp_so; 51 struct sockaddr_storage sp_src; /* source of gre packets */ 52 struct sockaddr_storage sp_dst; /* destination of gre packets */ 53 int sp_type; /* encapsulating socket type */ 54 int sp_proto; /* encapsulating protocol */ 55 bool sp_bysock; /* encapsulation configured by passing 56 * socket, not by SIOCSLIFPHYADDR 57 */ 58 }; 59 60 enum gre_state { 61 GRE_S_IDLE = 0 62 , GRE_S_IOCTL 63 , GRE_S_DIE 64 }; 65 66 struct gre_bufq { 67 volatile int bq_prodidx; 68 volatile int bq_considx; 69 size_t bq_len __aligned(CACHE_LINE_SIZE); 70 size_t bq_lenmask; 71 volatile int bq_drops; 72 struct mbuf **bq_buf; 73 }; 74 75 MALLOC_DECLARE(M_GRE_BUFQ); 76 77 enum gre_msg { 78 GRE_M_NONE = 0 79 , GRE_M_SETFP 80 , GRE_M_DELFP 81 , GRE_M_STOP 82 , GRE_M_OK 83 , GRE_M_ERR 84 }; 85 86 struct gre_softc { 87 struct ifnet sc_if; 88 kmutex_t sc_mtx; 89 kcondvar_t sc_condvar; 90 kcondvar_t sc_fp_condvar; 91 struct gre_bufq sc_snd; 92 struct gre_soparm sc_soparm; 93 volatile enum gre_state sc_state; 94 volatile int sc_waiters; 95 volatile int sc_fp_waiters; 96 void *sc_si; 97 98 struct evcnt sc_recv_ev; 99 struct evcnt sc_send_ev; 100 101 struct evcnt sc_block_ev; 102 struct evcnt sc_error_ev; 103 struct evcnt sc_pullup_ev; 104 struct evcnt sc_unsupp_ev; 105 struct evcnt sc_oflow_ev; 106 file_t * volatile sc_fp; 107 volatile enum gre_msg sc_msg; 108 int sc_fd; 109 }; 110 111 struct gre_h { 112 uint16_t flags; /* GRE flags */ 113 uint16_t ptype; /* protocol type of payload typically 114 * ethernet protocol type 115 */ 116 /* 117 * from here on: fields are optional, presence indicated by flags 118 * 119 u_int_16 checksum checksum (one-complements of GRE header 120 and payload 121 Present if (ck_pres | rt_pres == 1). 122 Valid if (ck_pres == 1). 123 u_int_16 offset offset from start of routing filed to 124 first octet of active SRE (see below). 125 Present if (ck_pres | rt_pres == 1). 126 Valid if (rt_pres == 1). 127 u_int_32 key inserted by encapsulator e.g. for 128 authentication 129 Present if (key_pres ==1 ). 130 u_int_32 seq_num Sequence number to allow for packet order 131 Present if (seq_pres ==1 ). 132 struct gre_sre[] routing Routing fileds (see below) 133 Present if (rt_pres == 1) 134 */ 135 } __packed; 136 137 #define GRE_CP 0x8000 /* Checksum Present */ 138 #define GRE_RP 0x4000 /* Routing Present */ 139 #define GRE_KP 0x2000 /* Key Present */ 140 #define GRE_SP 0x1000 /* Sequence Present */ 141 #define GRE_SS 0x0800 /* Strict Source Route */ 142 143 /* 144 * gre_sre defines a Source route Entry. These are needed if packets 145 * should be routed over more than one tunnel hop by hop 146 */ 147 struct gre_sre { 148 uint16_t sre_family; /* address family */ 149 u_char sre_offset; /* offset to first octet of active entry */ 150 u_char sre_length; /* number of octets in the SRE. 151 sre_lengthl==0 -> last entry. */ 152 u_char *sre_rtinfo; /* the routing information */ 153 }; 154 155 #define GRE_TTL 30 156 extern int ip_gre_ttl; 157 #endif /* _KERNEL */ 158 159 /* 160 * ioctls needed to manipulate the interface 161 */ 162 163 #define GRESADDRS _IOW('i', 101, struct ifreq) 164 #define GRESADDRD _IOW('i', 102, struct ifreq) 165 #define GREGADDRS _IOWR('i', 103, struct ifreq) 166 #define GREGADDRD _IOWR('i', 104, struct ifreq) 167 #define GRESPROTO _IOW('i' , 105, struct ifreq) 168 #define GREGPROTO _IOWR('i', 106, struct ifreq) 169 #define GRESSOCK _IOW('i' , 107, struct ifreq) 170 #define GREDSOCK _IOW('i' , 108, struct ifreq) 171 172 #endif /* !_NET_IF_GRE_H_ */ 173
Indexes created Mon Oct 20 20:10:13 GMT 2025