1 | /* $NetBSD: in_proto.c,v 1.120 2016/04/26 08:44:44 ozaki-r Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. Neither the name of the project nor the names of its contributors |
16 | * may be used to endorse or promote products derived from this software |
17 | * without specific prior written permission. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 | * SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Copyright (c) 1982, 1986, 1993 |
34 | * The Regents of the University of California. All rights reserved. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * 3. Neither the name of the University nor the names of its contributors |
45 | * may be used to endorse or promote products derived from this software |
46 | * without specific prior written permission. |
47 | * |
48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
58 | * SUCH DAMAGE. |
59 | * |
60 | * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 |
61 | */ |
62 | |
63 | #include <sys/cdefs.h> |
64 | __KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.120 2016/04/26 08:44:44 ozaki-r Exp $" ); |
65 | |
66 | #ifdef _KERNEL_OPT |
67 | #include "opt_mrouting.h" |
68 | #include "opt_inet.h" |
69 | #include "opt_ipsec.h" |
70 | #include "opt_pim.h" |
71 | #include "opt_gateway.h" |
72 | #include "opt_dccp.h" |
73 | #include "opt_sctp.h" |
74 | #include "opt_compat_netbsd.h" |
75 | #endif |
76 | |
77 | #include <sys/param.h> |
78 | #include <sys/socket.h> |
79 | #include <sys/protosw.h> |
80 | #include <sys/domain.h> |
81 | #include <sys/mbuf.h> |
82 | |
83 | #include <net/if.h> |
84 | |
85 | #include <netinet/in.h> |
86 | #include <netinet/in_systm.h> |
87 | #include <netinet/in_var.h> |
88 | #include <netinet/ip.h> |
89 | #include <netinet/ip_var.h> |
90 | #include <netinet/ip_icmp.h> |
91 | #include <netinet/in_ifattach.h> |
92 | #include <netinet/in_pcb.h> |
93 | #include <netinet/in_proto.h> |
94 | |
95 | #ifdef INET6 |
96 | #ifndef INET |
97 | #include <netinet/in.h> |
98 | #endif |
99 | #include <netinet/ip6.h> |
100 | #endif |
101 | |
102 | #include <netinet/igmp_var.h> |
103 | #ifdef PIM |
104 | #include <netinet/pim_var.h> |
105 | #endif |
106 | #include <netinet/tcp.h> |
107 | #include <netinet/tcp_fsm.h> |
108 | #include <netinet/tcp_seq.h> |
109 | #include <netinet/tcp_timer.h> |
110 | #include <netinet/tcp_var.h> |
111 | #include <netinet/tcpip.h> |
112 | #include <netinet/tcp_debug.h> |
113 | #include <netinet/udp.h> |
114 | #include <netinet/udp_var.h> |
115 | #include <netinet/ip_encap.h> |
116 | |
117 | #ifdef DCCP |
118 | #include <netinet/dccp.h> |
119 | #include <netinet/dccp_var.h> |
120 | #endif |
121 | |
122 | #ifdef SCTP |
123 | #include <netinet/sctp.h> |
124 | #include <netinet/sctp_var.h> |
125 | #endif |
126 | |
127 | /* |
128 | * TCP/IP protocol family: IP, ICMP, UDP, TCP. |
129 | */ |
130 | |
131 | #ifdef IPSEC |
132 | #include <netipsec/ipsec.h> |
133 | #include <netipsec/key.h> |
134 | #endif /* IPSEC */ |
135 | |
136 | #include "carp.h" |
137 | #if NCARP > 0 |
138 | #include <netinet/ip_carp.h> |
139 | #endif |
140 | |
141 | #include "pfsync.h" |
142 | #if NPFSYNC > 0 |
143 | #include <net/pfvar.h> |
144 | #include <net/if_pfsync.h> |
145 | #endif |
146 | |
147 | #include "etherip.h" |
148 | #if NETHERIP > 0 |
149 | #include <netinet/ip_etherip.h> |
150 | #endif |
151 | |
152 | DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ |
153 | |
154 | /* Wrappers to acquire kernel_lock. */ |
155 | |
156 | PR_WRAP_CTLINPUT(rip_ctlinput) |
157 | PR_WRAP_CTLINPUT(udp_ctlinput) |
158 | PR_WRAP_CTLINPUT(tcp_ctlinput) |
159 | |
160 | #define rip_ctlinput rip_ctlinput_wrapper |
161 | #define udp_ctlinput udp_ctlinput_wrapper |
162 | #define tcp_ctlinput tcp_ctlinput_wrapper |
163 | |
164 | PR_WRAP_CTLOUTPUT(rip_ctloutput) |
165 | PR_WRAP_CTLOUTPUT(udp_ctloutput) |
166 | PR_WRAP_CTLOUTPUT(tcp_ctloutput) |
167 | |
168 | #define rip_ctloutput rip_ctloutput_wrapper |
169 | #define udp_ctloutput udp_ctloutput_wrapper |
170 | #define tcp_ctloutput tcp_ctloutput_wrapper |
171 | |
172 | #ifdef DCCP |
173 | PR_WRAP_CTLINPUT(dccp_ctlinput) |
174 | PR_WRAP_CTLOUTPUT(dccp_ctloutput) |
175 | |
176 | #define dccp_ctlinput dccp_ctlinput_wrapper |
177 | #define dccp_ctloutput dccp_ctloutput_wrapper |
178 | #endif |
179 | |
180 | #ifdef SCTP |
181 | PR_WRAP_CTLINPUT(sctp_ctlinput) |
182 | PR_WRAP_CTLOUTPUT(sctp_ctloutput) |
183 | |
184 | #define sctp_ctlinput sctp_ctlinput_wrapper |
185 | #define sctp_ctloutput sctp_ctloutput_wrapper |
186 | #endif |
187 | |
188 | #if defined(IPSEC) |
189 | PR_WRAP_CTLINPUT(ah4_ctlinput) |
190 | |
191 | #define ah4_ctlinput ah4_ctlinput_wrapper |
192 | PR_WRAP_CTLINPUT(esp4_ctlinput) |
193 | |
194 | #define esp4_ctlinput esp4_ctlinput_wrapper |
195 | #endif |
196 | |
197 | const struct protosw inetsw[] = { |
198 | { .pr_domain = &inetdomain, |
199 | .pr_init = ip_init, |
200 | .pr_fasttimo = ip_fasttimo, |
201 | .pr_slowtimo = ip_slowtimo, |
202 | .pr_drain = ip_drainstub, |
203 | }, |
204 | { .pr_type = SOCK_DGRAM, |
205 | .pr_domain = &inetdomain, |
206 | .pr_protocol = IPPROTO_UDP, |
207 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, |
208 | .pr_input = udp_input, |
209 | .pr_ctlinput = udp_ctlinput, |
210 | .pr_ctloutput = udp_ctloutput, |
211 | .pr_usrreqs = &udp_usrreqs, |
212 | .pr_init = udp_init, |
213 | }, |
214 | { .pr_type = SOCK_STREAM, |
215 | .pr_domain = &inetdomain, |
216 | .pr_protocol = IPPROTO_TCP, |
217 | .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, |
218 | .pr_input = tcp_input, |
219 | .pr_ctlinput = tcp_ctlinput, |
220 | .pr_ctloutput = tcp_ctloutput, |
221 | .pr_usrreqs = &tcp_usrreqs, |
222 | .pr_init = tcp_init, |
223 | .pr_fasttimo = tcp_fasttimo, |
224 | .pr_drain = tcp_drainstub, |
225 | }, |
226 | #ifdef DCCP |
227 | { .pr_type = SOCK_CONN_DGRAM, |
228 | .pr_domain = &inetdomain, |
229 | .pr_protocol = IPPROTO_DCCP, |
230 | .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_ATOMIC|PR_LISTEN|PR_ABRTACPTDIS, |
231 | .pr_input = dccp_input, |
232 | .pr_ctlinput = dccp_ctlinput, |
233 | .pr_ctloutput = dccp_ctloutput, |
234 | .pr_usrreqs = &dccp_usrreqs, |
235 | .pr_init = dccp_init, |
236 | }, |
237 | #endif |
238 | #ifdef SCTP |
239 | { .pr_type = SOCK_DGRAM, |
240 | .pr_domain = &inetdomain, |
241 | .pr_protocol = IPPROTO_SCTP, |
242 | .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, |
243 | .pr_input = sctp_input, |
244 | .pr_ctlinput = sctp_ctlinput, |
245 | .pr_ctloutput = sctp_ctloutput, |
246 | .pr_usrreqs = &sctp_usrreqs, |
247 | .pr_init = sctp_init, |
248 | .pr_drain = sctp_drain |
249 | }, |
250 | { .pr_type = SOCK_SEQPACKET, |
251 | .pr_domain = &inetdomain, |
252 | .pr_protocol = IPPROTO_SCTP, |
253 | .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, |
254 | .pr_input = sctp_input, |
255 | .pr_ctlinput = sctp_ctlinput, |
256 | .pr_ctloutput = sctp_ctloutput, |
257 | .pr_usrreqs = &sctp_usrreqs, |
258 | .pr_drain = sctp_drain |
259 | }, |
260 | { .pr_type = SOCK_STREAM, |
261 | .pr_domain = &inetdomain, |
262 | .pr_protocol = IPPROTO_SCTP, |
263 | .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, |
264 | .pr_input = sctp_input, |
265 | .pr_ctlinput = sctp_ctlinput, |
266 | .pr_ctloutput = sctp_ctloutput, |
267 | .pr_usrreqs = &sctp_usrreqs, |
268 | .pr_drain = sctp_drain |
269 | }, |
270 | #endif /* SCTP */ |
271 | { .pr_type = SOCK_RAW, |
272 | .pr_domain = &inetdomain, |
273 | .pr_protocol = IPPROTO_RAW, |
274 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, |
275 | .pr_input = rip_input, |
276 | .pr_ctlinput = rip_ctlinput, |
277 | .pr_ctloutput = rip_ctloutput, |
278 | .pr_usrreqs = &rip_usrreqs, |
279 | }, |
280 | { .pr_type = SOCK_RAW, |
281 | .pr_domain = &inetdomain, |
282 | .pr_protocol = IPPROTO_ICMP, |
283 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
284 | .pr_input = icmp_input, |
285 | .pr_ctlinput = rip_ctlinput, |
286 | .pr_ctloutput = rip_ctloutput, |
287 | .pr_usrreqs = &rip_usrreqs, |
288 | .pr_init = icmp_init, |
289 | }, |
290 | #ifdef GATEWAY |
291 | { .pr_domain = &inetdomain, |
292 | .pr_protocol = IPPROTO_IP, |
293 | .pr_slowtimo = ipflow_slowtimo, |
294 | .pr_init = ipflow_poolinit, |
295 | }, |
296 | #endif /* GATEWAY */ |
297 | #ifdef IPSEC |
298 | { .pr_type = SOCK_RAW, |
299 | .pr_domain = &inetdomain, |
300 | .pr_protocol = IPPROTO_AH, |
301 | .pr_flags = PR_ATOMIC|PR_ADDR, |
302 | .pr_input = ipsec4_common_input, |
303 | .pr_ctlinput = ah4_ctlinput, |
304 | }, |
305 | { .pr_type = SOCK_RAW, |
306 | .pr_domain = &inetdomain, |
307 | .pr_protocol = IPPROTO_ESP, |
308 | .pr_flags = PR_ATOMIC|PR_ADDR, |
309 | .pr_input = ipsec4_common_input, |
310 | .pr_ctlinput = esp4_ctlinput, |
311 | }, |
312 | { .pr_type = SOCK_RAW, |
313 | .pr_domain = &inetdomain, |
314 | .pr_protocol = IPPROTO_IPCOMP, |
315 | .pr_flags = PR_ATOMIC|PR_ADDR, |
316 | .pr_input = ipsec4_common_input, |
317 | }, |
318 | #endif /* IPSEC */ |
319 | { .pr_type = SOCK_RAW, |
320 | .pr_domain = &inetdomain, |
321 | .pr_protocol = IPPROTO_IPV4, |
322 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
323 | .pr_input = encap4_input, |
324 | .pr_ctlinput = rip_ctlinput, |
325 | .pr_ctloutput = rip_ctloutput, |
326 | .pr_usrreqs = &rip_usrreqs, |
327 | .pr_init = encap_init, |
328 | }, |
329 | #ifdef INET6 |
330 | { .pr_type = SOCK_RAW, |
331 | .pr_domain = &inetdomain, |
332 | .pr_protocol = IPPROTO_IPV6, |
333 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
334 | .pr_input = encap4_input, |
335 | .pr_ctlinput = rip_ctlinput, |
336 | .pr_ctloutput = rip_ctloutput, |
337 | .pr_usrreqs = &rip_usrreqs, |
338 | .pr_init = encap_init, |
339 | }, |
340 | #endif /* INET6 */ |
341 | #if NETHERIP > 0 |
342 | { .pr_type = SOCK_RAW, |
343 | .pr_domain = &inetdomain, |
344 | .pr_protocol = IPPROTO_ETHERIP, |
345 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
346 | .pr_input = ip_etherip_input, |
347 | .pr_ctlinput = rip_ctlinput, |
348 | .pr_ctloutput = rip_ctloutput, |
349 | .pr_usrreqs = &rip_usrreqs, |
350 | }, |
351 | #endif /* NETHERIP > 0 */ |
352 | #if NCARP > 0 |
353 | { .pr_type = SOCK_RAW, |
354 | .pr_domain = &inetdomain, |
355 | .pr_protocol = IPPROTO_CARP, |
356 | .pr_flags = PR_ATOMIC|PR_ADDR, |
357 | .pr_input = carp_proto_input, |
358 | .pr_ctloutput = rip_ctloutput, |
359 | .pr_usrreqs = &rip_usrreqs, |
360 | .pr_init = carp_init, |
361 | }, |
362 | #endif /* NCARP > 0 */ |
363 | #if NPFSYNC > 0 |
364 | { .pr_type = SOCK_RAW, |
365 | .pr_domain = &inetdomain, |
366 | .pr_protocol = IPPROTO_PFSYNC, |
367 | .pr_flags = PR_ATOMIC|PR_ADDR, |
368 | .pr_input = pfsync_input, |
369 | .pr_ctloutput = rip_ctloutput, |
370 | .pr_usrreqs = &rip_usrreqs, |
371 | }, |
372 | #endif /* NPFSYNC > 0 */ |
373 | { .pr_type = SOCK_RAW, |
374 | .pr_domain = &inetdomain, |
375 | .pr_protocol = IPPROTO_IGMP, |
376 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
377 | .pr_input = igmp_input, |
378 | .pr_ctloutput = rip_ctloutput, |
379 | .pr_ctlinput = rip_ctlinput, |
380 | .pr_usrreqs = &rip_usrreqs, |
381 | .pr_fasttimo = igmp_fasttimo, |
382 | .pr_slowtimo = igmp_slowtimo, |
383 | .pr_init = igmp_init, |
384 | }, |
385 | #ifdef PIM |
386 | { .pr_type = SOCK_RAW, |
387 | .pr_domain = &inetdomain, |
388 | .pr_protocol = IPPROTO_PIM, |
389 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
390 | .pr_input = pim_input, |
391 | .pr_ctloutput = rip_ctloutput, |
392 | .pr_ctlinput = rip_ctlinput, |
393 | .pr_usrreqs = &rip_usrreqs, |
394 | }, |
395 | #endif /* PIM */ |
396 | /* raw wildcard */ |
397 | { .pr_type = SOCK_RAW, |
398 | .pr_domain = &inetdomain, |
399 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
400 | .pr_input = rip_input, |
401 | .pr_ctloutput = rip_ctloutput, |
402 | .pr_ctlinput = rip_ctlinput, |
403 | .pr_usrreqs = &rip_usrreqs, |
404 | .pr_init = rip_init, |
405 | }, |
406 | }; |
407 | |
408 | const struct sockaddr_in in_any = { |
409 | .sin_len = sizeof(struct sockaddr_in) |
410 | , .sin_family = AF_INET |
411 | , .sin_port = 0 |
412 | , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} |
413 | }; |
414 | |
415 | struct domain inetdomain = { |
416 | .dom_family = PF_INET, .dom_name = "internet" , .dom_init = NULL, |
417 | .dom_externalize = NULL, .dom_dispose = NULL, |
418 | .dom_protosw = inetsw, |
419 | .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], |
420 | .dom_rtattach = rt_inithead, |
421 | .dom_rtoffset = 32, |
422 | .dom_maxrtkey = sizeof(struct ip_pack4), |
423 | .dom_if_up = in_if_up, |
424 | .dom_if_down = in_if_down, |
425 | .dom_ifattach = in_domifattach, |
426 | .dom_ifdetach = in_domifdetach, |
427 | .dom_if_link_state_change = in_if_link_state_change, |
428 | .dom_ifqueues = { NULL, NULL }, |
429 | .dom_link = { NULL }, |
430 | .dom_mowner = MOWNER_INIT("" ,"" ), |
431 | .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), |
432 | .dom_sa_cmplen = sizeof(struct in_addr), |
433 | .dom_sa_any = (const struct sockaddr *)&in_any, |
434 | .dom_sockaddr_const_addr = sockaddr_in_const_addr, |
435 | .dom_sockaddr_addr = sockaddr_in_addr, |
436 | .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) |
437 | }; |
438 | |
439 | u_char ip_protox[IPPROTO_MAX]; |
440 | |
441 | int icmperrppslim = 100; /* 100pps */ |
442 | |
443 | static void |
444 | sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) |
445 | { |
446 | socklen_t slen; |
447 | |
448 | if (slenp == NULL) |
449 | return; |
450 | |
451 | slen = sockaddr_getlen(sa); |
452 | *slenp = (socklen_t)MIN(sizeof(struct in_addr), |
453 | slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); |
454 | } |
455 | |
456 | const void * |
457 | sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) |
458 | { |
459 | const struct sockaddr_in *sin; |
460 | |
461 | sockaddr_in_addrlen(sa, slenp); |
462 | sin = (const struct sockaddr_in *)sa; |
463 | return &sin->sin_addr; |
464 | } |
465 | |
466 | void * |
467 | sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) |
468 | { |
469 | struct sockaddr_in *sin; |
470 | |
471 | sockaddr_in_addrlen(sa, slenp); |
472 | sin = (struct sockaddr_in *)sa; |
473 | return &sin->sin_addr; |
474 | } |
475 | |
476 | int |
477 | sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) |
478 | { |
479 | uint_fast8_t len; |
480 | const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), |
481 | addrend = addrofs + sizeof(struct in_addr); |
482 | int rc; |
483 | const struct sockaddr_in *sin1, *sin2; |
484 | |
485 | sin1 = satocsin(sa1); |
486 | sin2 = satocsin(sa2); |
487 | |
488 | len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); |
489 | |
490 | if (len > addrofs && |
491 | (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, |
492 | len - addrofs)) != 0) |
493 | return rc; |
494 | |
495 | return sin1->sin_len - sin2->sin_len; |
496 | } |
497 | |