1 | /* |
2 | * Copyright (c) 2000-2010 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
30 | * All rights reserved. |
31 | * |
32 | * Redistribution and use in source and binary forms, with or without |
33 | * modification, are permitted provided that the following conditions |
34 | * are met: |
35 | * 1. Redistributions of source code must retain the above copyright |
36 | * notice, this list of conditions and the following disclaimer. |
37 | * 2. Redistributions in binary form must reproduce the above copyright |
38 | * notice, this list of conditions and the following disclaimer in the |
39 | * documentation and/or other materials provided with the distribution. |
40 | * 3. Neither the name of the project nor the names of its contributors |
41 | * may be used to endorse or promote products derived from this software |
42 | * without specific prior written permission. |
43 | * |
44 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
45 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
46 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
47 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
48 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
49 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
50 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
51 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
52 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
53 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
54 | * SUCH DAMAGE. |
55 | */ |
56 | /* |
57 | * glue for kernel code programming differences. |
58 | */ |
59 | |
60 | /* |
61 | * OS dependencies: |
62 | * |
63 | * - whether the IPv4 input routine convert the byte order of some fileds |
64 | * of the IP header (x: convert to the host byte order, s: strip the header |
65 | * length for possible reassembly) |
66 | * ip_len ip_id ip_off |
67 | * bsdi3: xs x x |
68 | * bsdi4: xs x |
69 | * FreeBSD: xs x |
70 | * NetBSD: x x |
71 | * OpenBSD: xs x x |
72 | * |
73 | * - ifa_ifwithaf() |
74 | * bsdi[34], netbsd, and openbsd define it in sys/net/if.c |
75 | * freebsd (all versions) does not have it. |
76 | * |
77 | * - struct rt_addrinfo |
78 | * bsdi4, netbsd 1.5R and beyond: rti_addrs, rti_info[], rti_flags, rti_ifa, |
79 | * rti_ifp, and rti_rtm. |
80 | * others: rti_addrs and rti_info[] only. |
81 | * |
82 | * - ifa->ifa_rtrequest |
83 | * bsdi4, netbsd 1.5R and beyond: rt_addrinfo * |
84 | * others: sockaddr * (note that sys/net/route.c:rtrequest() has an unsafe |
85 | * typecast code, from 4.3BSD-reno) |
86 | * |
87 | * - side effects of rtrequest{,1}(RTM_DELETE) |
88 | * BSDI[34]: delete all cloned routes underneath the route. |
89 | * FreeBSD[234]: delete all protocol-cloned routes underneath the route. |
90 | * note that cloned routes from an interface direct route |
91 | * still remain. |
92 | * NetBSD: 1.5 have no side effects. KAME/netbsd15, and post-1.5R, have |
93 | * the same effects as of BSDI. |
94 | * OpenBSD: have no side effects. KAME/openbsd has the same effects as |
95 | * of BSDI (the change is not merged - yet). |
96 | * |
97 | * - privileged process |
98 | * NetBSD, FreeBSD 3 |
99 | * struct proc *p; |
100 | * if (p && !suser(p->p_ucred, &p->p_acflag)) |
101 | * privileged; |
102 | * FreeBSD 4 |
103 | * struct proc *p; |
104 | * if (p && !suser(p)) |
105 | * privileged; |
106 | * OpenBSD, BSDI [34], FreeBSD 2 |
107 | * struct socket *so; |
108 | * if (so->so_state & SS_PRIV) |
109 | * privileged; |
110 | * - foo_control |
111 | * NetBSD, FreeBSD 3 |
112 | * needs to give struct proc * as argument |
113 | * OpenBSD, BSDI [34], FreeBSD 2 |
114 | * do not need struct proc * |
115 | * |
116 | * - bpf: |
117 | * OpenBSD, NetBSD 1.5, BSDI [34] |
118 | * need caddr_t * (= if_bpf **) and struct ifnet * |
119 | * FreeBSD 2, FreeBSD 3, NetBSD post-1.5N |
120 | * need only struct ifnet * as argument |
121 | * |
122 | * - struct ifnet |
123 | * use queue.h? member names if name |
124 | * --- --- --- |
125 | * FreeBSD 2 no old standard if_name+unit |
126 | * FreeBSD 3 yes strange if_name+unit |
127 | * OpenBSD yes standard if_xname |
128 | * NetBSD yes standard if_xname |
129 | * BSDI [34] no old standard if_name+unit |
130 | * |
131 | * - usrreq |
132 | * NetBSD, OpenBSD, BSDI [34], FreeBSD 2 |
133 | * single function with PRU_xx, arguments are mbuf |
134 | * FreeBSD 3 |
135 | * separates functions, non-mbuf arguments |
136 | * |
137 | * - {set,get}sockopt |
138 | * NetBSD, OpenBSD, BSDI [34], FreeBSD 2 |
139 | * manipulation based on mbuf |
140 | * FreeBSD 3 |
141 | * non-mbuf manipulation using sooptcopy{in,out}() |
142 | * |
143 | * - timeout() and untimeout() |
144 | * NetBSD 1.4.x, OpenBSD, BSDI [34], FreeBSD 2 |
145 | * timeout() is a void function |
146 | * FreeBSD 3 |
147 | * timeout() is non-void, must keep returned value for untimeout() |
148 | * callout_xx is also available (sys/callout.h) |
149 | * NetBSD 1.5 |
150 | * timeout() is obsoleted, use callout_xx (sys/callout.h) |
151 | * OpenBSD 2.8 |
152 | * timeout_{add,set,del} is encouraged (sys/timeout.h) |
153 | * |
154 | * - sysctl |
155 | * NetBSD, OpenBSD |
156 | * foo_sysctl() |
157 | * BSDI [34] |
158 | * foo_sysctl() but with different style. sysctl_int_arr() takes |
159 | * care of most of the cases. |
160 | * FreeBSD |
161 | * linker hack. however, there are freebsd version differences |
162 | * (how wonderful!). |
163 | * on FreeBSD[23] function arg #define includes paren. |
164 | * int foo SYSCTL_HANDLER_ARGS; |
165 | * on FreeBSD4, function arg #define does not include paren. |
166 | * int foo(SYSCTL_HANDLER_ARGS); |
167 | * on some versions, forward reference to the tree is okay. |
168 | * on some versions, you need SYSCTL_DECL(). you need things |
169 | * like this. |
170 | * #ifdef SYSCTL_DECL |
171 | * SYSCTL_DECL(net_inet_ip6); |
172 | * #endif |
173 | * it is hard to share functions between freebsd and non-freebsd. |
174 | * |
175 | * - if_ioctl |
176 | * NetBSD, FreeBSD 3, BSDI [34] |
177 | * 2nd argument is u_long cmd |
178 | * FreeBSD 2 |
179 | * 2nd argument is int cmd |
180 | * |
181 | * - if attach routines |
182 | * NetBSD |
183 | * void xxattach(int); |
184 | * FreeBSD 2, FreeBSD 3 |
185 | * void xxattach(void *); |
186 | * PSEUDO_SET(xxattach, if_xx); |
187 | * |
188 | * - ovbcopy() |
189 | * in NetBSD 1.4 or later, ovbcopy() is not supplied in the kernel. |
190 | * bcopy() is safe against overwrites. |
191 | * |
192 | * - splnet() |
193 | * NetBSD 1.4 or later requires splsoftnet(). |
194 | * other operating systems use splnet(). |
195 | * |
196 | * - struct ifnet for loopback interface |
197 | * BSDI3: struct ifnet loif; |
198 | * BSDI4: struct ifnet *loifp; |
199 | * NetBSD, OpenBSD 2.8, FreeBSD2: struct ifnet loif[NLOOP]; |
200 | * OpenBSD 2.9: struct ifnet *lo0ifp; |
201 | * |
202 | * odd thing is that many of them refers loif as ifnet *loif, |
203 | * not loif[NLOOP], from outside of if_loop.c. |
204 | * |
205 | * - number of bpf pseudo devices |
206 | * others: bpfilter.h, NBPFILTER |
207 | * FreeBSD4: bpf.h, NBPF |
208 | * solution: |
209 | * #if defined(__FreeBSD__) && __FreeBSD__ >= 4 |
210 | * #include "bpf.h" |
211 | * #define NBPFILTER NBPF |
212 | * #else |
213 | * #include "bpfilter.h" |
214 | * #endif |
215 | * |
216 | * - protosw for IPv4 (sys/netinet) |
217 | * FreeBSD4: struct ipprotosw in netinet/ipprotosw.h |
218 | * others: struct protosw in sys/protosw.h |
219 | * |
220 | * - protosw in general. |
221 | * NetBSD 1.5 has extra member for ipfilter (netbsd-current dropped |
222 | * it so it will go away in 1.6). |
223 | * NetBSD 1.5 requires PR_LISTEN flag bit with protocols that permit |
224 | * listen/accept (like tcp). |
225 | * |
226 | * - header files with defopt (opt_xx.h) |
227 | * FreeBSD3: opt_{inet,ipsec,ip6fw,altq}.h |
228 | * FreeBSD4: opt_{inet,inet6,ipsec,ip6fw,altq}.h |
229 | * NetBSD: opt_{inet,ipsec,altq}.h |
230 | * others: does not use defopt |
231 | * |
232 | * - (m->m_flags & M_EXT) != 0 does *not* mean that the max data length of |
233 | * the mbuf == MCLBYTES. |
234 | * |
235 | * - sys/kern/uipc_mbuf.c:m_dup() |
236 | * freebsd[34]: copies the whole mbuf chain. |
237 | * netbsd: similar arg with m_copym(). |
238 | * others: no m_dup(). |
239 | * |
240 | * - ifa_refcnt (struct ifaddr) management (IFAREF/IFAFREE). |
241 | * NetBSD 1.5: always use IFAREF whenever reference gets added. |
242 | * always use IFAFREE whenever reference gets freed. |
243 | * IFAFREE frees ifaddr when ifa_refcnt reaches 0. |
244 | * Darwin: always use ifa_addref whenever reference gets added. |
245 | * always use ifa_remref whenever reference gets freed. |
246 | * ifa_addref and ifa_remref are responsible for determining |
247 | * when to free. |
248 | * others: do not increase refcnt for ifp->if_addrlist and in_ifaddr. |
249 | * use IFAFREE once when ifaddr is disconnected from |
250 | * ifp->if_addrlist and in_ifaddr. IFAFREE frees ifaddr when |
251 | * ifa_refcnt goes negative. |
252 | */ |
253 | |
254 | #ifndef __NET_NET_OSDEP_H_DEFINED_ |
255 | #define __NET_NET_OSDEP_H_DEFINED_ |
256 | #include <sys/appleapiopts.h> |
257 | #ifdef KERNEL_PRIVATE |
258 | |
259 | struct ifnet; |
260 | |
261 | #define HAVE_OLD_BPF |
262 | |
263 | #define ifa_list ifa_link |
264 | #define if_addrlist if_addrhead |
265 | #define if_list if_link |
266 | |
267 | #define WITH_CONVERT_AND_STRIP_IP_LEN |
268 | |
269 | #if 1 /* at this moment, all OSes do this */ |
270 | #define WITH_CONVERT_IP_OFF |
271 | #endif |
272 | |
273 | #endif /* KERNEL_PRIVATE */ |
274 | #endif /*__NET_NET_OSDEP_H_DEFINED_ */ |
275 | |