/*      $NetBSD: bluetooth.c,v 1.2 2024/06/18 05:13:58 rillig Exp $     */

/*
* bluetooth.c
*
* Copyright (c) 2001-2003 Maksim Yevmenkin <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bluetooth.c,v 1.2 2024/06/18 05:13:58 rillig Exp $
* $FreeBSD: src/lib/libbluetooth/bluetooth.c,v 1.2 2004/03/05 08:10:17 markm Exp $
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: bluetooth.c,v 1.2 2024/06/18 05:13:58 rillig Exp $");

#include <bluetooth.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define _PATH_BT_HOSTS          "/etc/bluetooth/hosts"
#define _PATH_BT_PROTOCOLS      "/etc/bluetooth/protocols"
#define MAXALIASES               35

static FILE             *hostf = NULL;
static int               host_stayopen = 0;
static struct hostent    host;
static bdaddr_t          host_addr;
static char             *host_addr_ptrs[2];
static char             *host_aliases[MAXALIASES];

static FILE             *protof = NULL;
static int               proto_stayopen = 0;
static struct protoent   proto;
static char             *proto_aliases[MAXALIASES];

static char              buf[BUFSIZ + 1];

static int bt_hex_byte   (char const *str);
static int bt_hex_nibble (char nibble);

struct hostent *
bt_gethostbyname(char const *name)
{
       struct hostent  *p;
       char            **cp;

       bt_sethostent(host_stayopen);
       while ((p = bt_gethostent()) != NULL) {
               if (strcasecmp(p->h_name, name) == 0)
                       break;
               for (cp = p->h_aliases; *cp != 0; cp++)
                       if (strcasecmp(*cp, name) == 0)
                               goto found;
       }
found:
       bt_endhostent();

       return (p);
}

struct hostent *
bt_gethostbyaddr(char const *addr, socklen_t len, int type)
{
       struct hostent  *p;

       if (type != AF_BLUETOOTH || len != sizeof(bdaddr_t)) {
               h_errno = NO_RECOVERY;
               return (NULL);
       }

       bt_sethostent(host_stayopen);
       while ((p = bt_gethostent()) != NULL)
               if (p->h_addrtype == type && memcmp(p->h_addr, addr, len) == 0)
                       break;
       bt_endhostent();

       return (p);
}

struct hostent *
bt_gethostent(void)
{
       char    *p, *cp, **q;

       if (hostf == NULL)
               hostf = fopen(_PATH_BT_HOSTS, "r");

       if (hostf == NULL) {
               h_errno = NETDB_INTERNAL;
               return (NULL);
       }
again:
       if ((p = fgets(buf, sizeof(buf), hostf)) == NULL) {
               h_errno = HOST_NOT_FOUND;
               return (NULL);
       }
       if (*p == '#')
               goto again;
       if ((cp = strpbrk(p, "#\n")) == NULL)
               goto again;
       *cp = 0;
       if ((cp = strpbrk(p, " \t")) == NULL)
               goto again;
       *cp++ = 0;
       if (bt_aton(p, &host_addr) == 0)
               goto again;
       host_addr_ptrs[0] = (char *) &host_addr;
       host_addr_ptrs[1] = NULL;
       host.h_addr_list = host_addr_ptrs;
       host.h_length = sizeof(host_addr);
       host.h_addrtype = AF_BLUETOOTH;
       while (*cp == ' ' || *cp == '\t')
               cp++;
       host.h_name = cp;
       q = host.h_aliases = host_aliases;
       if ((cp = strpbrk(cp, " \t")) != NULL)
               *cp++ = 0;
       while (cp != NULL && *cp != 0) {
               if (*cp == ' ' || *cp == '\t') {
                       cp++;
                       continue;
               }
               if (q < &host_aliases[MAXALIASES - 1])
                       *q++ = cp;
               if ((cp = strpbrk(cp, " \t")) != NULL)
                       *cp++ = 0;
       }
       *q = NULL;
       h_errno = NETDB_SUCCESS;

       return (&host);
}

void
bt_sethostent(int stayopen)
{
       if (hostf == NULL)
               hostf = fopen(_PATH_BT_HOSTS, "r");
       else
               rewind(hostf);

       host_stayopen = stayopen;
}

void
bt_endhostent(void)
{
       if (hostf != NULL && host_stayopen == 0) {
               (void) fclose(hostf);
               hostf = NULL;
       }
}

struct protoent *
bt_getprotobyname(char const *name)
{
       struct protoent  *p;
       char            **cp;

       bt_setprotoent(proto_stayopen);
       while ((p = bt_getprotoent()) != NULL) {
               if (strcmp(p->p_name, name) == 0)
                       break;
               for (cp = p->p_aliases; *cp != 0; cp++)
                       if (strcmp(*cp, name) == 0)
                               goto found;
       }
found:
       bt_endprotoent();

       return (p);
}

struct protoent *
bt_getprotobynumber(int num)
{
       struct protoent *p;

       bt_setprotoent(proto_stayopen);
       while ((p = bt_getprotoent()) != NULL)
               if (p->p_proto == num)
                       break;
       bt_endprotoent();

       return (p);
}

struct protoent *
bt_getprotoent(void)
{
       char    *p, *cp, **q;

       if (protof == NULL)
               protof = fopen(_PATH_BT_PROTOCOLS, "r");

       if (protof == NULL)
               return (NULL);
again:
       if ((p = fgets(buf, sizeof(buf), protof)) == NULL)
               return (NULL);
       if (*p == '#')
               goto again;
       if ((cp = strpbrk(p, "#\n")) == NULL)
               goto again;
       *cp = '\0';
       proto.p_name = p;
       if ((cp = strpbrk(p, " \t")) == NULL)
               goto again;
       *cp++ = '\0';
       while (*cp == ' ' || *cp == '\t')
               cp++;
       if ((p = strpbrk(cp, " \t")) != NULL)
               *p++ = '\0';
       proto.p_proto = (int)strtol(cp, NULL, 0);
       q = proto.p_aliases = proto_aliases;
       if (p != NULL) {
               cp = p;
               while (cp != NULL && *cp != 0) {
                       if (*cp == ' ' || *cp == '\t') {
                               cp++;
                               continue;
                       }
                       if (q < &proto_aliases[MAXALIASES - 1])
                               *q++ = cp;
                       if ((cp = strpbrk(cp, " \t")) != NULL)
                               *cp++ = '\0';
               }
       }
       *q = NULL;

       return (&proto);
}

void
bt_setprotoent(int stayopen)
{
       if (protof == NULL)
               protof = fopen(_PATH_BT_PROTOCOLS, "r");
       else
               rewind(protof);

       proto_stayopen = stayopen;
}

void
bt_endprotoent(void)
{
       if (protof != NULL) {
               (void) fclose(protof);
               protof = NULL;
       }
}

char const *
bt_ntoa(bdaddr_t const *ba, char *str)
{
       static char     buffer[24];

       if (str == NULL)
               str = buffer;

       sprintf(str, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
               ba->b[5], ba->b[4], ba->b[3], ba->b[2], ba->b[1], ba->b[0]);

       return (str);
}

int
bt_aton(char const *str, bdaddr_t *ba)
{
       int      i, b;
       const char *end;

       memset(ba, 0, sizeof(*ba));

       for (i = 5, end = strchr(str, ':');
            i > 0 && *str != '\0' && end != NULL;
            i --, str = end + 1, end = strchr(str, ':')) {
               switch (end - str) {
               case 1:
                       b = bt_hex_nibble(str[0]);
                       break;

               case 2:
                       b = bt_hex_byte(str);
                       break;

               default:
                       b = -1;
                       break;
               }

               if (b < 0)
                       return (0);

               ba->b[i] = b;
       }

       if (i != 0 || end != NULL || *str == 0)
               return (0);

       switch (strlen(str)) {
       case 1:
               b = bt_hex_nibble(str[0]);
               break;

       case 2:
               b = bt_hex_byte(str);
               break;

       default:
               b = -1;
               break;
       }

       if (b < 0)
               return (0);

       ba->b[i] = b;

       return (1);
}

static int
bt_hex_byte(char const *str)
{
       int     n1, n2;

       if ((n1 = bt_hex_nibble(str[0])) < 0)
               return (-1);

       if ((n2 = bt_hex_nibble(str[1])) < 0)
               return (-1);

       return ((((n1 & 0x0f) << 4) | (n2 & 0x0f)) & 0xff);
}

static int
bt_hex_nibble(char nibble)
{
       if ('0' <= nibble && nibble <= '9')
               return (nibble - '0');

       if ('a' <= nibble && nibble <= 'f')
               return (nibble - 'a' + 0xa);

       if ('A' <= nibble && nibble <= 'F')
               return (nibble - 'A' + 0xa);

       return (-1);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.