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+/* $OpenBSD: net_osdep.h,v 1.1 1999/12/08 06:50:18 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:
+ *
+ * - privileged process
+ * NetBSD, FreeBSD 3
+ * struct proc *p;
+ * if (p && !suser(p->p_ucred, &p->p_acflag))
+ * 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:
+ * OpenBSD, NetBSD, BSDI [34]
+ * need caddr_t * (= if_bpf **) and struct ifnet *
+ * FreeBSD 2, FreeBSD 3
+ * 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()
+ * NetBSD, OpenBSD, BSDI [34], FreeBSD 2
+ * timeout() is a void function
+ * FreeBSD 3
+ * timeout() is non-void, must keep returned value for untimeuot()
+ * - 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;
+ * NetBSD, OpenBSD, FreeBSD2: struct ifnet loif[NLOOP];
+ *
+ * odd thing is that many of them refers loif as ifnet *loif,
+ * not loif[NLOOP], from outside of if_loop.c.
+ */
+
+#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_ */