if_gre.h revision 1.38
1 /* $NetBSD: if_gre.h,v 1.38 2008/05/15 04:03:53 dyoung 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 #define __cacheline_aligned __attribute__((__aligned__(CACHE_LINE_SIZE))) 67 68 struct gre_bufq { 69 volatile int bq_prodidx; 70 volatile int bq_considx; 71 size_t bq_len __cacheline_aligned; 72 size_t bq_lenmask; 73 volatile int bq_drops; 74 struct mbuf **bq_buf; 75 }; 76 77 MALLOC_DECLARE(M_GRE_BUFQ); 78 79 enum gre_msg { 80 GRE_M_NONE = 0 81 , GRE_M_SETFP 82 , GRE_M_DELFP 83 , GRE_M_STOP 84 , GRE_M_OK 85 , GRE_M_ERR 86 }; 87 88 struct gre_softc { 89 struct ifnet sc_if; 90 kmutex_t sc_mtx; 91 kcondvar_t sc_condvar; 92 kcondvar_t sc_fp_condvar; 93 struct gre_bufq sc_snd; 94 struct gre_soparm sc_soparm; 95 volatile enum gre_state sc_state; 96 volatile int sc_waiters; 97 volatile int sc_fp_waiters; 98 void *sc_si; 99 100 struct evcnt sc_recv_ev; 101 struct evcnt sc_send_ev; 102 103 struct evcnt sc_block_ev; 104 struct evcnt sc_error_ev; 105 struct evcnt sc_pullup_ev; 106 struct evcnt sc_unsupp_ev; 107 struct evcnt sc_oflow_ev; 108 file_t * volatile sc_fp; 109 volatile enum gre_msg sc_msg; 110 int sc_fd; 111 }; 112 113 struct gre_h { 114 uint16_t flags; /* GRE flags */ 115 uint16_t ptype; /* protocol type of payload typically 116 * ethernet protocol type 117 */ 118 /* 119 * from here on: fields are optional, presence indicated by flags 120 * 121 u_int_16 checksum checksum (one-complements of GRE header 122 and payload 123 Present if (ck_pres | rt_pres == 1). 124 Valid if (ck_pres == 1). 125 u_int_16 offset offset from start of routing filed to 126 first octet of active SRE (see below). 127 Present if (ck_pres | rt_pres == 1). 128 Valid if (rt_pres == 1). 129 u_int_32 key inserted by encapsulator e.g. for 130 authentication 131 Present if (key_pres ==1 ). 132 u_int_32 seq_num Sequence number to allow for packet order 133 Present if (seq_pres ==1 ). 134 struct gre_sre[] routing Routing fileds (see below) 135 Present if (rt_pres == 1) 136 */ 137 } __packed; 138 139 #define GRE_CP 0x8000 /* Checksum Present */ 140 #define GRE_RP 0x4000 /* Routing Present */ 141 #define GRE_KP 0x2000 /* Key Present */ 142 #define GRE_SP 0x1000 /* Sequence Present */ 143 #define GRE_SS 0x0800 /* Strict Source Route */ 144 145 /* 146 * gre_sre defines a Source route Entry. These are needed if packets 147 * should be routed over more than one tunnel hop by hop 148 */ 149 struct gre_sre { 150 uint16_t sre_family; /* address family */ 151 u_char sre_offset; /* offset to first octet of active entry */ 152 u_char sre_length; /* number of octets in the SRE. 153 sre_lengthl==0 -> last entry. */ 154 u_char *sre_rtinfo; /* the routing information */ 155 }; 156 157 #define GRE_TTL 30 158 extern int ip_gre_ttl; 159 #endif /* _KERNEL */ 160 161 /* 162 * ioctls needed to manipulate the interface 163 */ 164 165 #define GRESADDRS _IOW('i', 101, struct ifreq) 166 #define GRESADDRD _IOW('i', 102, struct ifreq) 167 #define GREGADDRS _IOWR('i', 103, struct ifreq) 168 #define GREGADDRD _IOWR('i', 104, struct ifreq) 169 #define GRESPROTO _IOW('i' , 105, struct ifreq) 170 #define GREGPROTO _IOWR('i', 106, struct ifreq) 171 #define GRESSOCK _IOW('i' , 107, struct ifreq) 172 #define GREDSOCK _IOW('i' , 108, struct ifreq) 173 174 #endif /* !_NET_IF_GRE_H_ */ 175
Indexes created Sun Sep 28 16:09:52 GMT 2025