if_gre.h revision 1.28
1 /* $NetBSD: if_gre.h,v 1.28 2007/10/05 04:55:10 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _NET_IF_GRE_H_ 40 #define _NET_IF_GRE_H_ 41 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 sockaddr_storage sp_src; /* source of gre packets */ 51 struct sockaddr_storage sp_dst; /* destination of gre packets */ 52 int sp_type; /* encapsulating socket type */ 53 int sp_proto; /* encapsulating protocol */ 54 int sp_fd; 55 int 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_CONF 63 , GRE_S_WORK 64 , GRE_S_KCONF 65 , GRE_S_DIE 66 , GRE_S_DEAD 67 }; 68 69 #define __cacheline_aligned __attribute__((__aligned__(CACHE_LINE_SIZE))) 70 71 struct gre_bufq { 72 volatile int bq_prodidx; 73 volatile int bq_considx; 74 size_t bq_len __cacheline_aligned; 75 size_t bq_lenmask; 76 volatile int bq_drops; 77 struct mbuf **bq_buf; 78 }; 79 80 MALLOC_DECLARE(M_GRE_BUFQ); 81 82 struct gre_softc { 83 struct ifnet sc_if; 84 kmutex_t sc_mtx; 85 kcondvar_t sc_condvar; 86 struct gre_bufq sc_snd; 87 struct gre_soparm sc_soparm; 88 struct gre_soparm sc_newsoparm; 89 struct lwp *sc_lwp; 90 volatile enum gre_state sc_state; 91 volatile int sc_waiters; 92 volatile int sc_upcalls; 93 void *sc_si; 94 struct socket *sc_so; 95 96 struct evcnt sc_recv_ev; 97 struct evcnt sc_send_ev; 98 struct evcnt sc_wakeup_ev; 99 100 struct evcnt sc_block_ev; 101 struct evcnt sc_error_ev; 102 struct evcnt sc_pullup_ev; 103 struct evcnt sc_unsupp_ev; 104 struct evcnt sc_oflow_ev; 105 }; 106 107 struct gre_h { 108 uint16_t flags; /* GRE flags */ 109 uint16_t ptype; /* protocol type of payload typically 110 * ethernet protocol type 111 */ 112 /* 113 * from here on: fields are optional, presence indicated by flags 114 * 115 u_int_16 checksum checksum (one-complements of GRE header 116 and payload 117 Present if (ck_pres | rt_pres == 1). 118 Valid if (ck_pres == 1). 119 u_int_16 offset offset from start of routing filed to 120 first octet of active SRE (see below). 121 Present if (ck_pres | rt_pres == 1). 122 Valid if (rt_pres == 1). 123 u_int_32 key inserted by encapsulator e.g. for 124 authentication 125 Present if (key_pres ==1 ). 126 u_int_32 seq_num Sequence number to allow for packet order 127 Present if (seq_pres ==1 ). 128 struct gre_sre[] routing Routing fileds (see below) 129 Present if (rt_pres == 1) 130 */ 131 } __attribute__((__packed__)); 132 133 #define GRE_CP 0x8000 /* Checksum Present */ 134 #define GRE_RP 0x4000 /* Routing Present */ 135 #define GRE_KP 0x2000 /* Key Present */ 136 #define GRE_SP 0x1000 /* Sequence Present */ 137 #define GRE_SS 0x0800 /* Strict Source Route */ 138 139 /* 140 * gre_sre defines a Source route Entry. These are needed if packets 141 * should be routed over more than one tunnel hop by hop 142 */ 143 struct gre_sre { 144 u_int16_t sre_family; /* address family */ 145 u_char sre_offset; /* offset to first octet of active entry */ 146 u_char sre_length; /* number of octets in the SRE. 147 sre_lengthl==0 -> last entry. */ 148 u_char *sre_rtinfo; /* the routing information */ 149 }; 150 151 #define GRE_TTL 30 152 extern int ip_gre_ttl; 153 #endif /* _KERNEL */ 154 155 /* 156 * ioctls needed to manipulate the interface 157 */ 158 159 #define GRESADDRS _IOW('i', 101, struct ifreq) 160 #define GRESADDRD _IOW('i', 102, struct ifreq) 161 #define GREGADDRS _IOWR('i', 103, struct ifreq) 162 #define GREGADDRD _IOWR('i', 104, struct ifreq) 163 #define GRESPROTO _IOW('i' , 105, struct ifreq) 164 #define GREGPROTO _IOWR('i', 106, struct ifreq) 165 #define GRESSOCK _IOW('i' , 107, struct ifreq) 166 #define GREDSOCK _IOW('i' , 108, struct ifreq) 167 168 #endif /* !_NET_IF_GRE_H_ */ 169
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