16fc3635f7
that this provokes. "Wherever possible" means "In the kernel OR NOT
C++" (implying C).
There are places where (void *) pointers are not valid, such as for
function pointers, but in the special case of (void *)0, agreement
settles on it being OK.
Most of the fixes were NULL where an integer zero was needed; many
of the fixes were NULL where ascii <nul> ('\0') was needed, and a
few were just "other".
Tested on: i386 sparc64
370 lines
7.2 KiB
C
370 lines
7.2 KiB
C
/*
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* bluetooth.c
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*
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* Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: bluetooth.c,v 1.3 2003/05/20 23:04:30 max Exp $
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* $FreeBSD$
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*/
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#include <bluetooth.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define _PATH_BT_HOSTS "/etc/bluetooth/hosts"
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#define _PATH_BT_PROTOCOLS "/etc/bluetooth/protocols"
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#define MAXALIASES 35
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static FILE *hostf = NULL;
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static int host_stayopen = 0;
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static struct hostent host;
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static bdaddr_t host_addr;
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static char *host_addr_ptrs[2];
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static char *host_aliases[MAXALIASES];
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static FILE *protof = NULL;
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static int proto_stayopen = 0;
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static struct protoent proto;
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static char *proto_aliases[MAXALIASES];
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static char buf[BUFSIZ + 1];
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static int bt_hex_byte (char const *str);
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static int bt_hex_nibble (char nibble);
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struct hostent *
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bt_gethostbyname(char const *name)
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{
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struct hostent *p;
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char **cp;
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bt_sethostent(host_stayopen);
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while ((p = bt_gethostent()) != NULL) {
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if (strcasecmp(p->h_name, name) == 0)
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break;
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for (cp = p->h_aliases; *cp != 0; cp++)
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if (strcasecmp(*cp, name) == 0)
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goto found;
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}
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found:
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bt_endhostent();
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return (p);
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}
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struct hostent *
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bt_gethostbyaddr(char const *addr, int len, int type)
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{
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struct hostent *p;
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if (type != AF_BLUETOOTH || len != sizeof(bdaddr_t)) {
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h_errno = NO_RECOVERY;
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return (NULL);
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}
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bt_sethostent(host_stayopen);
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while ((p = bt_gethostent()) != NULL)
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if (p->h_addrtype == type && bcmp(p->h_addr, addr, len) == 0)
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break;
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bt_endhostent();
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return (p);
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}
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struct hostent *
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bt_gethostent(void)
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{
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char *p, *cp, **q;
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if (hostf == NULL)
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hostf = fopen(_PATH_BT_HOSTS, "r");
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if (hostf == NULL) {
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h_errno = NETDB_INTERNAL;
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return (NULL);
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}
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again:
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if ((p = fgets(buf, sizeof(buf), hostf)) == NULL) {
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h_errno = HOST_NOT_FOUND;
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return (NULL);
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}
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if (*p == '#')
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goto again;
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if ((cp = strpbrk(p, "#\n")) == NULL)
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goto again;
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*cp = 0;
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if ((cp = strpbrk(p, " \t")) == NULL)
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goto again;
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*cp++ = 0;
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if (bt_aton(p, &host_addr) == 0)
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goto again;
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host_addr_ptrs[0] = (char *) &host_addr;
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host_addr_ptrs[1] = NULL;
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host.h_addr_list = host_addr_ptrs;
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host.h_length = sizeof(host_addr);
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host.h_addrtype = AF_BLUETOOTH;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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host.h_name = cp;
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q = host.h_aliases = host_aliases;
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if ((cp = strpbrk(cp, " \t")) != NULL)
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*cp++ = 0;
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while (cp != NULL && *cp != 0) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (q < &host_aliases[MAXALIASES - 1])
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*q++ = cp;
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if ((cp = strpbrk(cp, " \t")) != NULL)
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*cp++ = 0;
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}
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*q = NULL;
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h_errno = NETDB_SUCCESS;
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return (&host);
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}
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void
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bt_sethostent(int stayopen)
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{
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if (hostf == NULL)
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hostf = fopen(_PATH_BT_HOSTS, "r");
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else
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rewind(hostf);
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host_stayopen = stayopen;
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}
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void
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bt_endhostent(void)
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{
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if (hostf != NULL && host_stayopen == 0) {
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(void) fclose(hostf);
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hostf = NULL;
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}
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}
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struct protoent *
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bt_getprotobyname(char const *name)
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{
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struct protoent *p;
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char **cp;
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bt_setprotoent(proto_stayopen);
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while ((p = bt_getprotoent()) != NULL) {
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if (strcmp(p->p_name, name) == 0)
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break;
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for (cp = p->p_aliases; *cp != 0; cp++)
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if (strcmp(*cp, name) == 0)
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goto found;
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}
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found:
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bt_endprotoent();
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return (p);
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}
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struct protoent *
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bt_getprotobynumber(int proto)
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{
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struct protoent *p;
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bt_setprotoent(proto_stayopen);
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while ((p = bt_getprotoent()) != NULL)
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if (p->p_proto == proto)
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break;
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bt_endprotoent();
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return (p);
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}
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struct protoent *
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bt_getprotoent(void)
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{
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char *p, *cp, **q;
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if (protof == NULL)
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protof = fopen(_PATH_BT_PROTOCOLS, "r");
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if (protof == NULL)
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return (NULL);
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again:
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if ((p = fgets(buf, sizeof(buf), protof)) == NULL)
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return (NULL);
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if (*p == '#')
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goto again;
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if ((cp = strpbrk(p, "#\n")) == NULL)
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goto again;
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*cp = '\0';
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proto.p_name = p;
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if ((cp = strpbrk(p, " \t")) == NULL)
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goto again;
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*cp++ = '\0';
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while (*cp == ' ' || *cp == '\t')
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cp++;
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if ((p = strpbrk(cp, " \t")) != NULL)
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*p++ = '\0';
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proto.p_proto = atoi(cp);
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q = proto.p_aliases = proto_aliases;
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if (p != NULL) {
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cp = p;
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while (cp != NULL && *cp != 0) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (q < &proto_aliases[MAXALIASES - 1])
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*q++ = cp;
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if ((cp = strpbrk(cp, " \t")) != NULL)
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*cp++ = '\0';
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}
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}
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*q = NULL;
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return (&proto);
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}
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void
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bt_setprotoent(int stayopen)
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{
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if (protof == NULL)
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protof = fopen(_PATH_BT_PROTOCOLS, "r");
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else
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rewind(protof);
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proto_stayopen = stayopen;
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}
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void
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bt_endprotoent(void)
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{
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if (protof != NULL) {
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(void) fclose(protof);
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protof = NULL;
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}
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}
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char const *
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bt_ntoa(bdaddr_t const *ba, char *str)
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{
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static char buffer[24];
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if (str == NULL)
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str = buffer;
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sprintf(str, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
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ba->b[5], ba->b[4], ba->b[3], ba->b[2], ba->b[1], ba->b[0]);
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return (str);
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}
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int
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bt_aton(char const *str, bdaddr_t *ba)
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{
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int i, b;
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char *end = NULL;
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memset(ba, 0, sizeof(*ba));
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for (i = 5, end = strchr(str, ':');
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i > 0 && *str != '\0' && end != NULL;
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i --, str = end + 1, end = strchr(str, ':')) {
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switch (end - str) {
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case 1:
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b = bt_hex_nibble(str[0]);
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break;
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case 2:
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b = bt_hex_byte(str);
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break;
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default:
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b = -1;
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break;
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}
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if (b < 0)
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return (0);
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ba->b[i] = b;
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}
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if (i != 0 || end != NULL || *str == 0)
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return (0);
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switch (strlen(str)) {
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case 1:
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b = bt_hex_nibble(str[0]);
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break;
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case 2:
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b = bt_hex_byte(str);
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break;
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default:
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b = -1;
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break;
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}
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if (b < 0)
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return (0);
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ba->b[i] = b;
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return (1);
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}
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static int
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bt_hex_byte(char const *str)
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{
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int n1, n2;
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if ((n1 = bt_hex_nibble(str[0])) < 0)
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return (-1);
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if ((n2 = bt_hex_nibble(str[1])) < 0)
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return (-1);
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return ((((n1 & 0x0f) << 4) | (n2 & 0x0f)) & 0xff);
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}
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static int
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bt_hex_nibble(char nibble)
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{
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if ('0' <= nibble && nibble <= '9')
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return (nibble - '0');
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if ('a' <= nibble && nibble <= 'f')
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return (nibble - 'a' + 0xa);
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if ('A' <= nibble && nibble <= 'F')
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return (nibble - 'A' + 0xa);
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return (-1);
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}
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