/* $NetBSD: if_gre.h,v 1.50 2021/12/03 13:27:39 andvar Exp $ */ /* * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Heiko W.Rupp <hwr@pilhuhn.de> * * This code is derived from software contributed to The NetBSD Foundation * by David Young <dyoung@NetBSD.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * This material is based upon work partially supported by NSF * under Contract No. NSF CNS-0626584. */ #ifndef _NET_IF_GRE_H_ #define _NET_IF_GRE_H_ #include <sys/ioccom.h> #include <sys/evcnt.h> #include <sys/queue.h> #include <sys/mutex.h> #include <sys/condvar.h> #include <sys/malloc.h> #include <sys/mallocvar.h> #ifdef _KERNEL #include <sys/pcq.h> struct gre_soparm { struct socket *sp_so; struct sockaddr_storage sp_src; /* source of gre packets */ struct sockaddr_storage sp_dst; /* destination of gre packets */ int sp_type; /* encapsulating socket type */ int sp_proto; /* encapsulating protocol */ bool sp_bysock; /* encapsulation configured by passing * socket, not by SIOCSLIFPHYADDR */ }; enum gre_state { GRE_S_IDLE = 0 , GRE_S_IOCTL , GRE_S_DIE }; struct gre_bufq { pcq_t *bq_q; volatile int bq_drops; }; enum gre_msg { GRE_M_NONE = 0 , GRE_M_SETFP , GRE_M_DELFP , GRE_M_STOP , GRE_M_OK , GRE_M_ERR }; struct gre_softc { struct ifnet sc_if; kmutex_t sc_mtx; kcondvar_t sc_condvar; kcondvar_t sc_fp_condvar; struct gre_bufq sc_snd; struct gre_soparm sc_soparm; volatile enum gre_state sc_state; volatile int sc_waiters; volatile int sc_fp_waiters; void *sc_si; struct evcnt sc_recv_ev; struct evcnt sc_send_ev; struct evcnt sc_block_ev; struct evcnt sc_error_ev; struct evcnt sc_pullup_ev; struct evcnt sc_unsupp_ev; struct evcnt sc_oflow_ev; file_t * volatile sc_fp; volatile enum gre_msg sc_msg; int sc_fd; }; struct gre_h { uint16_t flags; /* GRE flags */ uint16_t ptype; /* protocol type of payload typically * ethernet protocol type */ /* * from here on: fields are optional, presence indicated by flags * u_int_16 checksum checksum (one-complements of GRE header and payload Present if (ck_pres | rt_pres == 1). Valid if (ck_pres == 1). u_int_16 offset offset from start of routing field to first octet of active SRE (see below). Present if (ck_pres | rt_pres == 1). Valid if (rt_pres == 1). u_int_32 key inserted by encapsulator e.g. for authentication Present if (key_pres ==1 ). u_int_32 seq_num Sequence number to allow for packet order Present if (seq_pres ==1 ). struct gre_sre[] routing Routing fields (see below) Present if (rt_pres == 1) */ }; #define GRE_CP 0x8000 /* Checksum Present */ #define GRE_RP 0x4000 /* Routing Present */ #define GRE_KP 0x2000 /* Key Present */ #define GRE_SP 0x1000 /* Sequence Present */ #define GRE_SS 0x0800 /* Strict Source Route */ /* * gre_sre defines a Source route Entry. These are needed if packets * should be routed over more than one tunnel hop by hop */ struct gre_sre { uint16_t sre_family; /* address family */ u_char sre_offset; /* offset to first octet of active entry */ u_char sre_length; /* number of octets in the SRE. sre_lengthl==0 -> last entry. */ u_char *sre_rtinfo; /* the routing information */ }; #define GRE_TTL 30 extern int ip_gre_ttl; #endif /* _KERNEL */ /* * ioctls needed to manipulate the interface */ #define GRESADDRS _IOW('i', 101, struct ifreq) #define GRESADDRD _IOW('i', 102, struct ifreq) #define GREGADDRS _IOWR('i', 103, struct ifreq) #define GREGADDRD _IOWR('i', 104, struct ifreq) #define GRESPROTO _IOW('i', 105, struct ifreq) #define GREGPROTO _IOWR('i', 106, struct ifreq) #define GRESSOCK _IOW('i', 107, struct ifreq) #define GREDSOCK _IOW('i', 108, struct ifreq) #endif /* !_NET_IF_GRE_H_ */
