1/*	$NetBSD: at_proto.c,v 1.16 2008/04/24 11:38:37 ad 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 1.16 2008/04/24 11:38:37 ad 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/radix.h>
41#include <net/if_ether.h>
42#include <netinet/in.h>
43#include <net/route.h>
44
45#include <netatalk/at.h>
46#include <netatalk/ddp.h>
47#include <netatalk/at_var.h>
48#include <netatalk/ddp_var.h>
49#include <netatalk/at_extern.h>
50
51DOMAIN_DEFINE(atalkdomain);	/* forward declare and add to link set */
52
53PR_WRAP_USRREQ(ddp_usrreq)
54#define	ddp_usrreq	ddp_usrreq_wrapper
55
56const struct protosw atalksw[] = {
57    {
58	.pr_type = SOCK_DGRAM,
59	.pr_domain = &atalkdomain,
60	.pr_protocol = ATPROTO_DDP,
61	.pr_flags = PR_ATOMIC|PR_ADDR,
62	.pr_output = ddp_output,
63	.pr_usrreq = ddp_usrreq,
64	.pr_init = ddp_init,
65    },
66};
67
68struct domain atalkdomain = {
69	.dom_family = PF_APPLETALK,
70	.dom_name = "appletalk",
71	.dom_init = NULL,
72	.dom_externalize = NULL,
73	.dom_dispose = NULL,
74	.dom_protosw = atalksw,
75	.dom_protoswNPROTOSW = &atalksw[__arraycount(atalksw)],
76	.dom_rtattach = rt_inithead,
77	.dom_rtoffset = 32,
78	.dom_maxrtkey = sizeof(struct sockaddr_at),
79	.dom_ifattach = NULL,
80	.dom_ifdetach = NULL,
81	.dom_ifqueues = { &atintrq1, &atintrq2 },
82	.dom_link = { NULL },
83	.dom_mowner = MOWNER_INIT("",""),
84	.dom_sa_cmpofs = offsetof(struct sockaddr_at, sat_addr),
85	.dom_sa_cmplen = sizeof(struct at_addr),
86	.dom_rtcache = LIST_HEAD_INITIALIZER(atalkdomain.dom_rtcache)
87};
88
89int
90sockaddr_at_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
91{
92	int rc;
93	uint_fast8_t len;
94	const uint_fast8_t addrofs = offsetof(struct sockaddr_at, sat_addr),
95			   addrend = addrofs + sizeof(struct at_addr);
96	const struct sockaddr_at *sat1, *sat2;
97
98	sat1 = satocsat(sa1);
99	sat2 = satocsat(sa2);
100
101	len = MIN(addrend, MIN(sat1->sat_len, sat2->sat_len));
102
103	if (len > addrofs &&
104	    (rc = memcmp(&sat1->sat_addr, &sat2->sat_addr, len - addrofs)) != 0)
105		return rc;
106
107	return sat1->sat_len - sat2->sat_len;
108}
109