1 /* $NetBSD: at_proto.c,v 1.22 2017/09/21 07:15:34 ozaki-r 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 1.22 2017/09/21 07:15:34 ozaki-r 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_ifqueues = { &atintrq1, &atintrq2 }, 77 .dom_link = { NULL }, 78 .dom_mowner = MOWNER_INIT("",""), 79 .dom_sa_cmpofs = offsetof(struct sockaddr_at, sat_addr), 80 .dom_sa_cmplen = sizeof(struct at_addr), 81 }; 82 83 int 84 sockaddr_at_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 85 { 86 int rc; 87 uint_fast8_t len; 88 const uint_fast8_t addrofs = offsetof(struct sockaddr_at, sat_addr), 89 addrend = addrofs + sizeof(struct at_addr); 90 const struct sockaddr_at *sat1, *sat2; 91 92 sat1 = satocsat(sa1); 93 sat2 = satocsat(sa2); 94 95 len = MIN(addrend, MIN(sat1->sat_len, sat2->sat_len)); 96 97 if (len > addrofs && 98 (rc = memcmp(&sat1->sat_addr, &sat2->sat_addr, len - addrofs)) != 0) 99 return rc; 100 101 return sat1->sat_len - sat2->sat_len; 102 } 103