1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22/* 23 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 24 * All rights reserved. 25 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions 28 * are met: 29 * 1. Redistributions of source code must retain the above copyright 30 * notice, this list of conditions and the following disclaimer. 31 * 2. Redistributions in binary form must reproduce the above copyright 32 * notice, this list of conditions and the following disclaimer in the 33 * documentation and/or other materials provided with the distribution. 34 * 3. Neither the name of the project nor the names of its contributors 35 * may be used to endorse or promote products derived from this software 36 * without specific prior written permission. 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 41 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 */ 50/* 51 * glue for kernel code programming differences. 52 */ 53 54/* 55 * OS dependencies: 56 * 57 * - whether the IPv4 input routine convert the byte order of some fileds 58 * of the IP header (x: convert to the host byte order, s: strip the header 59 * length for possible reassembly) 60 * ip_len ip_id ip_off 61 * bsdi3: xs x x 62 * bsdi4: xs x 63 * FreeBSD: xs x 64 * NetBSD: x x 65 * OpenBSD: xs x x 66 * 67 * - ifa_ifwithaf() 68 * bsdi[34], netbsd, and openbsd define it in sys/net/if.c 69 * freebsd (all versions) does not have it. 70 * 71 * - struct rt_addrinfo 72 * bsdi4, netbsd 1.5R and beyond: rti_addrs, rti_info[], rti_flags, rti_ifa, 73 * rti_ifp, and rti_rtm. 74 * others: rti_addrs and rti_info[] only. 75 * 76 * - ifa->ifa_rtrequest 77 * bsdi4, netbsd 1.5R and beyond: rt_addrinfo * 78 * others: sockaddr * (note that sys/net/route.c:rtrequest() has an unsafe 79 * typecast code, from 4.3BSD-reno) 80 * 81 * - side effects of rtrequest{,1}(RTM_DELETE) 82 * BSDI[34]: delete all cloned routes underneath the route. 83 * FreeBSD[234]: delete all protocol-cloned routes underneath the route. 84 * note that cloned routes from an interface direct route 85 * still remain. 86 * NetBSD: 1.5 have no side effects. KAME/netbsd15, and post-1.5R, have 87 * the same effects as of BSDI. 88 * OpenBSD: have no side effects. KAME/openbsd has the same effects as 89 * of BSDI (the change is not merged - yet). 90 * 91 * - privileged process 92 * NetBSD, FreeBSD 3 93 * struct proc *p; 94 * if (p && !suser(p->p_ucred, &p->p_acflag)) 95 * privileged; 96 * FreeBSD 4 97 * struct proc *p; 98 * if (p && !suser(p)) 99 * privileged; 100 * OpenBSD, BSDI [34], FreeBSD 2 101 * struct socket *so; 102 * if (so->so_state & SS_PRIV) 103 * privileged; 104 * - foo_control 105 * NetBSD, FreeBSD 3 106 * needs to give struct proc * as argument 107 * OpenBSD, BSDI [34], FreeBSD 2 108 * do not need struct proc * 109 * 110 * - bpf: 111 * OpenBSD, NetBSD 1.5, BSDI [34] 112 * need caddr_t * (= if_bpf **) and struct ifnet * 113 * FreeBSD 2, FreeBSD 3, NetBSD post-1.5N 114 * need only struct ifnet * as argument 115 * 116 * - struct ifnet 117 * use queue.h? member names if name 118 * --- --- --- 119 * FreeBSD 2 no old standard if_name+unit 120 * FreeBSD 3 yes strange if_name+unit 121 * OpenBSD yes standard if_xname 122 * NetBSD yes standard if_xname 123 * BSDI [34] no old standard if_name+unit 124 * 125 * - usrreq 126 * NetBSD, OpenBSD, BSDI [34], FreeBSD 2 127 * single function with PRU_xx, arguments are mbuf 128 * FreeBSD 3 129 * separates functions, non-mbuf arguments 130 * 131 * - {set,get}sockopt 132 * NetBSD, OpenBSD, BSDI [34], FreeBSD 2 133 * manipulation based on mbuf 134 * FreeBSD 3 135 * non-mbuf manipulation using sooptcopy{in,out}() 136 * 137 * - timeout() and untimeout() 138 * NetBSD 1.4.x, OpenBSD, BSDI [34], FreeBSD 2 139 * timeout() is a void function 140 * FreeBSD 3 141 * timeout() is non-void, must keep returned value for untimeout() 142 * callout_xx is also available (sys/callout.h) 143 * NetBSD 1.5 144 * timeout() is obsoleted, use callout_xx (sys/callout.h) 145 * OpenBSD 2.8 146 * timeout_{add,set,del} is encouraged (sys/timeout.h) 147 * 148 * - sysctl 149 * NetBSD, OpenBSD 150 * foo_sysctl() 151 * BSDI [34] 152 * foo_sysctl() but with different style. sysctl_int_arr() takes 153 * care of most of the cases. 154 * FreeBSD 155 * linker hack. however, there are freebsd version differences 156 * (how wonderful!). 157 * on FreeBSD[23] function arg #define includes paren. 158 * int foo SYSCTL_HANDLER_ARGS; 159 * on FreeBSD4, function arg #define does not include paren. 160 * int foo(SYSCTL_HANDLER_ARGS); 161 * on some versions, forward reference to the tree is okay. 162 * on some versions, you need SYSCTL_DECL(). you need things 163 * like this. 164 * #ifdef SYSCTL_DECL 165 * SYSCTL_DECL(net_inet_ip6); 166 * #endif 167 * it is hard to share functions between freebsd and non-freebsd. 168 * 169 * - if_ioctl 170 * NetBSD, FreeBSD 3, BSDI [34] 171 * 2nd argument is u_long cmd 172 * FreeBSD 2 173 * 2nd argument is int cmd 174 * 175 * - if attach routines 176 * NetBSD 177 * void xxattach(int); 178 * FreeBSD 2, FreeBSD 3 179 * void xxattach(void *); 180 * PSEUDO_SET(xxattach, if_xx); 181 * 182 * - ovbcopy() 183 * in NetBSD 1.4 or later, ovbcopy() is not supplied in the kernel. 184 * bcopy() is safe against overwrites. 185 * 186 * - splnet() 187 * NetBSD 1.4 or later requires splsoftnet(). 188 * other operating systems use splnet(). 189 * 190 * - dtom() 191 * NEVER USE IT! 192 * 193 * - struct ifnet for loopback interface 194 * BSDI3: struct ifnet loif; 195 * BSDI4: struct ifnet *loifp; 196 * NetBSD, OpenBSD 2.8, FreeBSD2: struct ifnet loif[NLOOP]; 197 * OpenBSD 2.9: struct ifnet *lo0ifp; 198 * 199 * odd thing is that many of them refers loif as ifnet *loif, 200 * not loif[NLOOP], from outside of if_loop.c. 201 * 202 * - number of bpf pseudo devices 203 * others: bpfilter.h, NBPFILTER 204 * FreeBSD4: bpf.h, NBPF 205 * solution: 206 * #if defined(__FreeBSD__) && __FreeBSD__ >= 4 207 * #include "bpf.h" 208 * #define NBPFILTER NBPF 209 * #else 210 * #include "bpfilter.h" 211 * #endif 212 * 213 * - protosw for IPv4 (sys/netinet) 214 * FreeBSD4: struct ipprotosw in netinet/ipprotosw.h 215 * others: struct protosw in sys/protosw.h 216 * 217 * - protosw in general. 218 * NetBSD 1.5 has extra member for ipfilter (netbsd-current dropped 219 * it so it will go away in 1.6). 220 * NetBSD 1.5 requires PR_LISTEN flag bit with protocols that permit 221 * listen/accept (like tcp). 222 * 223 * - header files with defopt (opt_xx.h) 224 * FreeBSD3: opt_{inet,ipsec,ip6fw,altq}.h 225 * FreeBSD4: opt_{inet,inet6,ipsec,ip6fw,altq}.h 226 * NetBSD: opt_{inet,ipsec,altq}.h 227 * others: does not use defopt 228 * 229 * - (m->m_flags & M_EXT) != 0 does *not* mean that the max data length of 230 * the mbuf == MCLBYTES. 231 * 232 * - sys/kern/uipc_mbuf.c:m_dup() 233 * freebsd[34]: copies the whole mbuf chain. 234 * netbsd: similar arg with m_copym(). 235 * others: no m_dup(). 236 * 237 * - ifa_refcnt (struct ifaddr) management (IFAREF/IFAFREE). 238 * NetBSD 1.5: always use IFAREF whenever reference gets added. 239 * always use IFAFREE whenever reference gets freed. 240 * IFAFREE frees ifaddr when ifa_refcnt reaches 0. 241 * Darwin: always use ifaref whenever reference gets added. 242 * always use ifafree whenever reference gets freed. 243 * ifaref and ifafree are responsible for determining when to free. 244 * others: do not increase refcnt for ifp->if_addrlist and in_ifaddr. 245 * use IFAFREE once when ifaddr is disconnected from 246 * ifp->if_addrlist and in_ifaddr. IFAFREE frees ifaddr when 247 * ifa_refcnt goes negative. 248 */ 249 250#ifndef __NET_NET_OSDEP_H_DEFINED_ 251#define __NET_NET_OSDEP_H_DEFINED_ 252#include <sys/appleapiopts.h> 253#ifdef KERNEL_PRIVATE 254 255struct ifnet; 256extern const char *if_name(struct ifnet *); 257 258#define HAVE_OLD_BPF 259 260#define ifa_list ifa_link 261#define if_addrlist if_addrhead 262#define if_list if_link 263 264/* sys/net/if.h */ 265#ifndef __APPLE__ 266#define IFAREF(ifa) do { ++(ifa)->ifa_refcnt; } while (0) 267#endif 268 269#define WITH_CONVERT_AND_STRIP_IP_LEN 270 271#if 1 /* at this moment, all OSes do this */ 272#define WITH_CONVERT_IP_OFF 273#endif 274 275#endif /* KERNEL_PRIVATE */ 276#endif /*__NET_NET_OSDEP_H_DEFINED_ */ 277