| 1 | /* $NetBSD: at_proto.c,v 1.21 2016/01/21 15:41:30 riastradh 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 1.21 2016/01/21 15:41:30 riastradh 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 | .dom_rtcache = LIST_HEAD_INITIALIZER(atalkdomain.dom_rtcache) |
| 82 | }; |
| 83 | |
| 84 | int |
| 85 | sockaddr_at_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) |
| 86 | { |
| 87 | int rc; |
| 88 | uint_fast8_t len; |
| 89 | const uint_fast8_t addrofs = offsetof(struct sockaddr_at, sat_addr), |
| 90 | addrend = addrofs + sizeof(struct at_addr); |
| 91 | const struct sockaddr_at *sat1, *sat2; |
| 92 | |
| 93 | sat1 = satocsat(sa1); |
| 94 | sat2 = satocsat(sa2); |
| 95 | |
| 96 | len = MIN(addrend, MIN(sat1->sat_len, sat2->sat_len)); |
| 97 | |
| 98 | if (len > addrofs && |
| 99 | (rc = memcmp(&sat1->sat_addr, &sat2->sat_addr, len - addrofs)) != 0) |
| 100 | return rc; |
| 101 | |
| 102 | return sat1->sat_len - sat2->sat_len; |
| 103 | } |
| 104 | |