Annotation of sys/netbt/hci_misc.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: hci_misc.c,v 1.1 2007/05/30 03:42:53 uwe Exp $ */
! 2: /* $NetBSD: hci_misc.c,v 1.1 2006/06/19 15:44:45 gdamore Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2005 Iain Hibbert.
! 6: * Copyright (c) 2006 Itronix Inc.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. The name of Itronix Inc. may not be used to endorse
! 18: * or promote products derived from this software without specific
! 19: * prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
! 22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 23: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 24: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
! 25: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 26: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
! 27: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
! 28: * ON ANY THEORY OF LIABILITY, WHETHER IN
! 29: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 30: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 31: * POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: #include <sys/cdefs.h>
! 35:
! 36: #include <sys/param.h>
! 37: #include <sys/kernel.h>
! 38: #include <sys/malloc.h>
! 39: #include <sys/mbuf.h>
! 40: #include <sys/proc.h>
! 41: #include <sys/queue.h>
! 42: #include <sys/systm.h>
! 43:
! 44: #include <netbt/bluetooth.h>
! 45: #include <netbt/hci.h>
! 46:
! 47: /*
! 48: * cache Inquiry Responses for this number of seconds for routing
! 49: * purposes [sysctl]
! 50: */
! 51: int hci_memo_expiry = 600;
! 52:
! 53: /*
! 54: * set 'src' address for routing to 'dest'
! 55: */
! 56: int
! 57: hci_route_lookup(bdaddr_t *src, bdaddr_t *dest)
! 58: {
! 59: struct hci_unit *unit;
! 60: struct hci_link *link;
! 61: struct hci_memo *memo;
! 62:
! 63: /*
! 64: * Walk the ACL connections, if we have a connection
! 65: * to 'dest' already then thats best..
! 66: */
! 67: TAILQ_FOREACH(unit, &hci_unit_list, hci_next) {
! 68: if ((unit->hci_flags & BTF_UP) == 0)
! 69: continue;
! 70:
! 71: TAILQ_FOREACH(link, &unit->hci_links, hl_next) {
! 72: if (link->hl_type != HCI_LINK_ACL)
! 73: continue;
! 74:
! 75: if (bdaddr_same(&link->hl_bdaddr, dest))
! 76: goto found;
! 77: }
! 78: }
! 79:
! 80: /*
! 81: * Now check all the memos to see if there has been an
! 82: * inquiry repsonse..
! 83: */
! 84: TAILQ_FOREACH(unit, &hci_unit_list, hci_next) {
! 85: if ((unit->hci_flags & BTF_UP) == 0)
! 86: continue;
! 87:
! 88: memo = hci_memo_find(unit, dest);
! 89: if (memo)
! 90: goto found;
! 91: }
! 92:
! 93: /*
! 94: * Last ditch effort, lets use the first unit we find
! 95: * thats up and running. (XXX settable default route?)
! 96: */
! 97: TAILQ_FOREACH(unit, &hci_unit_list, hci_next) {
! 98: if ((unit->hci_flags & BTF_UP) == 0)
! 99: continue;
! 100:
! 101: goto found;
! 102: }
! 103:
! 104: return EHOSTUNREACH;
! 105:
! 106: found:
! 107: bdaddr_copy(src, &unit->hci_bdaddr);
! 108: return 0;
! 109: }
! 110:
! 111: /*
! 112: * find unit memo from bdaddr
! 113: */
! 114: struct hci_memo *
! 115: hci_memo_find(struct hci_unit *unit, bdaddr_t *bdaddr)
! 116: {
! 117: struct hci_memo *memo, *m0;
! 118: struct timeval now;
! 119:
! 120: microtime(&now);
! 121:
! 122: m0 = LIST_FIRST(&unit->hci_memos);
! 123: while ((memo = m0) != NULL) {
! 124: m0 = LIST_NEXT(memo, next);
! 125:
! 126: if (now.tv_sec > memo->time.tv_sec + hci_memo_expiry) {
! 127: DPRINTF("memo %p too old (expiring)\n", memo);
! 128: hci_memo_free(memo);
! 129: continue;
! 130: }
! 131:
! 132: if (bdaddr_same(bdaddr, &memo->response.bdaddr)) {
! 133: DPRINTF("memo %p found\n", memo);
! 134: return memo;
! 135: }
! 136: }
! 137:
! 138: DPRINTF("no memo found\n");
! 139: return NULL;
! 140: }
! 141:
! 142: void
! 143: hci_memo_free(struct hci_memo *memo)
! 144: {
! 145:
! 146: LIST_REMOVE(memo, next);
! 147: free(memo, M_BLUETOOTH);
! 148: }
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