1 /* $NetBSD: at_proto.c,v 1.23 2022/09/03 01:48:22 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1990,1991 Regents of The University of Michigan.
5 * All Rights Reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and
8 * its documentation for any purpose and without fee is hereby granted,
9 * provided that the above copyright notice appears in all copies and
10 * that both that copyright notice and this permission notice appear
11 * in supporting documentation, and that the name of The University
12 * of Michigan not be used in advertising or publicity pertaining to
13 * distribution of the software without specific, written prior
14 * permission. This software is supplied as is without expressed or
15 * implied warranties of any kind.
16 *
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 *
20 * Research Systems Unix Group
21 * The University of Michigan
22 * c/o Wesley Craig
23 * 535 W. William Street
24 * Ann Arbor, Michigan
25 * +1-313-764-2278
26 * netatalk@umich.edu
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: at_proto.c,v 1.23 2022/09/03 01:48:22 thorpej Exp $");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/protosw.h>
35 #include <sys/domain.h>
36 #include <sys/socket.h>
37
38 #include <sys/kernel.h>
39 #include <net/if.h>
40 #include <net/if_ether.h>
41 #include <netinet/in.h>
42 #include <net/route.h>
43
44 #include <netatalk/at.h>
45 #include <netatalk/ddp.h>
46 #include <netatalk/at_var.h>
47 #include <netatalk/ddp_var.h>
48 #include <netatalk/at_extern.h>
49
50 DOMAIN_DEFINE(atalkdomain); /* forward declare and add to link set */
51
52 const struct protosw atalksw[] = {
53 {
54 .pr_type = SOCK_DGRAM,
55 .pr_domain = &atalkdomain,
56 .pr_protocol = ATPROTO_DDP,
57 .pr_flags = PR_ATOMIC|PR_ADDR,
58 .pr_usrreqs = &ddp_usrreqs,
59 .pr_init = ddp_init,
60 },
61 };
62
63 struct domain atalkdomain = {
64 .dom_family = PF_APPLETALK,
65 .dom_name = "appletalk",
66 .dom_init = NULL,
67 .dom_externalize = NULL,
68 .dom_dispose = NULL,
69 .dom_protosw = atalksw,
70 .dom_protoswNPROTOSW = &atalksw[__arraycount(atalksw)],
71 .dom_rtattach = rt_inithead,
72 .dom_rtoffset = 32,
73 .dom_maxrtkey = sizeof(struct sockaddr_at),
74 .dom_ifattach = NULL,
75 .dom_ifdetach = NULL,
76 .dom_link = { NULL },
77 .dom_mowner = MOWNER_INIT("",""),
78 .dom_sa_cmpofs = offsetof(struct sockaddr_at, sat_addr),
79 .dom_sa_cmplen = sizeof(struct at_addr),
80 };
81
82 int
sockaddr_at_cmp(const struct sockaddr * sa1,const struct sockaddr * sa2)83 sockaddr_at_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
84 {
85 int rc;
86 uint_fast8_t len;
87 const uint_fast8_t addrofs = offsetof(struct sockaddr_at, sat_addr),
88 addrend = addrofs + sizeof(struct at_addr);
89 const struct sockaddr_at *sat1, *sat2;
90
91 sat1 = satocsat(sa1);
92 sat2 = satocsat(sa2);
93
94 len = MIN(addrend, MIN(sat1->sat_len, sat2->sat_len));
95
96 if (len > addrofs &&
97 (rc = memcmp(&sat1->sat_addr, &sat2->sat_addr, len - addrofs)) != 0)
98 return rc;
99
100 return sat1->sat_len - sat2->sat_len;
101 }
102