NetBSD/sys/net/net_osdep.h

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2001-02-08 15:36:06 +03:00
/* $NetBSD: net_osdep.h,v 1.4 2001/02/08 12:36:06 itojun Exp $ */
/* $KAME: net_osdep.h,v 1.35 2001/02/06 01:33:03 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
*/
/*
* glue for kernel code programming differences.
*/
/*
* OS dependencies:
*
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* - ifa_ifwithaf()
* bsdi[34], netbsd, and openbsd define it in sys/net/if.c
* freebsd (all versions) does not have it.
*
* - struct rt_addrinfo
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* bsdi4, netbsd 1.5R and beyond: rti_addrs, rti_info[], rti_flags, rti_ifa,
* rti_ifp, and rti_rtm.
* others: rti_addrs and rti_info[] only.
*
* - ifa->ifa_rtrequest
* bsdi4, netbsd 1.5R and beyond: rt_addrinfo *
* others: sockaddr * (note that sys/net/route.c:rtrequest() has an unsafe
* typecast code, from 4.3BSD-reno)
*
* - side effects of rtrequest[1](RTM_DELETE)
* BSDI[34]: delete all cloned routes underneath the route.
* FreeBSD[234]: delete all protocol-cloned routes underneath the route.
* note that cloned routes from an interface direct route
* still remain.
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* NetBSD: official release versions (the latest is 1.5 as of Jan. 2001)
* have no side effects. KAME for NetBSD has the same effects
* as of BSDI.
* OpenBSD: no side effects.
*
* - privileged process
* NetBSD, FreeBSD 3
* struct proc *p;
* if (p && !suser(p->p_ucred, &p->p_acflag))
* privileged;
* FreeBSD 4
* struct proc *p;
* if (p && !suser(p))
* privileged;
* OpenBSD, BSDI [34], FreeBSD 2
* struct socket *so;
* if (so->so_state & SS_PRIV)
* privileged;
* - foo_control
* NetBSD, FreeBSD 3
* needs to give struct proc * as argument
* OpenBSD, BSDI [34], FreeBSD 2
* do not need struct proc *
* - bpf:
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* OpenBSD, NetBSD 1.5, BSDI [34]
* need caddr_t * (= if_bpf **) and struct ifnet *
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* FreeBSD 2, FreeBSD 3, NetBSD 1.6? (1.5N and later)
* need only struct ifnet * as argument
* - struct ifnet
* use queue.h? member names if name
* --- --- ---
* FreeBSD 2 no old standard if_name+unit
* FreeBSD 3 yes strange if_name+unit
* OpenBSD yes standard if_xname
* NetBSD yes standard if_xname
* BSDI [34] no old standard if_name+unit
* - usrreq
* NetBSD, OpenBSD, BSDI [34], FreeBSD 2
* single function with PRU_xx, arguments are mbuf
* FreeBSD 3
* separates functions, non-mbuf arguments
* - {set,get}sockopt
* NetBSD, OpenBSD, BSDI [34], FreeBSD 2
* manipulation based on mbuf
* FreeBSD 3
* non-mbuf manipulation using sooptcopy{in,out}()
* - timeout() and untimeout()
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* NetBSD 1.4.x, OpenBSD, BSDI [34], FreeBSD 2
* timeout() is a void function
* FreeBSD 3
* timeout() is non-void, must keep returned value for untimeout()
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* NetBSD 1.5
* timeout() is obsoleted, use callout_xx (sys/callout.h)
* - sysctl
* NetBSD, OpenBSD
* foo_sysctl()
* BSDI [34]
* foo_sysctl() but with different style
* FreeBSD 2, FreeBSD 3
* linker hack
*
* - if_ioctl
* NetBSD, FreeBSD 3, BSDI [34]
* 2nd argument is u_long cmd
* FreeBSD 2
* 2nd argument is int cmd
* - if attach routines
* NetBSD
* void xxattach(int);
* FreeBSD 2, FreeBSD 3
* void xxattach(void *);
* PSEUDO_SET(xxattach, if_xx);
*
* - ovbcopy()
* in NetBSD 1.4 or later, ovbcopy() is not supplied in the kernel.
* bcopy() is safe against overwrites.
* - splnet()
* NetBSD 1.4 or later requires splsoftnet().
* other operating systems use splnet().
*
* - dtom()
* NEVER USE IT!
*
* - struct ifnet for loopback interface
* BSDI3: struct ifnet loif;
* BSDI4: struct ifnet *loifp;
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* NetBSD, OpenBSD 2.8, FreeBSD2: struct ifnet loif[NLOOP];
* OpenBSD 2.9: struct ifnet *lo0ifp;
*
* odd thing is that many of them refers loif as ifnet *loif,
* not loif[NLOOP], from outside of if_loop.c.
*
* - number of bpf pseudo devices
* others: bpfilter.h, NBPFILTER
* FreeBSD4: bpf.h, NBPF
* solution:
* #if defined(__FreeBSD__) && __FreeBSD__ >= 4
* #include "bpf.h"
* #define NBPFILTER NBPF
* #else
* #include "bpfilter.h"
* #endif
*
* - protosw for IPv4 (sys/netinet)
* FreeBSD4: struct ipprotosw in netinet/ipprotosw.h
* others: struct protosw in sys/protosw.h
*
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* - protosw. NetBSD 1.5 has extra member for ipfilter. NetBSD 1.5 requires
* PR_LISTEN flag bit with protocols that permit listen/accept (like tcp).
*
* - header files with defopt (opt_xx.h)
* FreeBSD3: opt_{inet,ipsec,ip6fw,altq}.h
* FreeBSD4: opt_{inet,inet6,ipsec,ip6fw,altq}.h
* NetBSD: opt_{inet,ipsec,altq}.h
* others: does not use defopt
*
* - IN_MULTICAST/IN_CLASS[A-D] macro.
* OpenBSD and NetBSD: net endian (kernel) or host endian (userland)
* others: always host endian
*
* - (m->m_flags & M_EXT) != 0 does *not* mean that the max data length of
* the mbuf == MCLBYTES.
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*
* - ifa_refcnt (struct ifaddr) management (IFAREF/IFAFREE).
* NetBSD 1.5: always use IFAREF whenever reference gets added.
* always use IFAFREE whenever reference gets freed.
* IFAFREE frees ifaddr when ifa_refcnt reaches 0.
* others: do not increase refcnt for ifp->if_addrlist and in_ifaddr.
* use IFAFREE once when ifaddr is disconnected from
* ifp->if_addrlist and in_ifaddr. IFAFREE frees ifaddr when
* ifa_refcnt goes negative.
*/
#ifndef __NET_NET_OSDEP_H_DEFINED_
#define __NET_NET_OSDEP_H_DEFINED_
#ifdef _KERNEL
#if defined(__NetBSD__) || defined(__OpenBSD__)
#define if_name(ifp) ((ifp)->if_xname)
#else
struct ifnet;
extern char *if_name __P((struct ifnet *));
#endif
#ifdef __FreeBSD__
#define HAVE_OLD_BPF
#endif
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#define ifa_list ifa_link
#define if_addrlist if_addrhead
#define if_list if_link
#endif
#if defined(__NetBSD__) && __NetBSD_Version__ >= 104000000
#define ovbcopy bcopy
#endif
#if defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
#define HAVE_NRL_INPCB
#endif
#endif /*_KERNEL*/
#endif /*__NET_NET_OSDEP_H_DEFINED_ */