hw/bt/core.c

   1 /*
   2  * Convenience functions for bluetooth.
   3  *
   4  * Copyright (C) 2008 Andrzej Zaborowski  <balrog@zabor.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 or
   9  * (at your option) version 3 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "qemu/error-report.h"
  22 #include "sysemu/bt.h"
  23 #include "hw/bt.h"
  24
  25 /* Slave implementations can ignore this */
  26 static void bt_dummy_lmp_mode_change(struct bt_link_s *link)
  27 {
  28 }
  29
  30 /* Slaves should never receive these PDUs */
  31 static void bt_dummy_lmp_connection_complete(struct bt_link_s *link)
  32 {
  33     if (link->slave->reject_reason)
  34         error_report("%s: stray LMP_not_accepted received, fixme", __func__);
  35     else
  36         error_report("%s: stray LMP_accepted received, fixme", __func__);
  37     exit(-1);
  38 }
  39
  40 static void bt_dummy_lmp_disconnect_master(struct bt_link_s *link)
  41 {
  42     error_report("%s: stray LMP_detach received, fixme", __func__);
  43     exit(-1);
  44 }
  45
  46 static void bt_dummy_lmp_acl_resp(struct bt_link_s *link,
  47                 const uint8_t *data, int start, int len)
  48 {
  49     error_report("%s: stray ACL response PDU, fixme", __func__);
  50     exit(-1);
  51 }
  52
  53 /* Slaves that don't hold any additional per link state can use these */
  54 static void bt_dummy_lmp_connection_request(struct bt_link_s *req)
  55 {
  56     struct bt_link_s *link = g_malloc0(sizeof(struct bt_link_s));
  57
  58     link->slave = req->slave;
  59     link->host = req->host;
  60
  61     req->host->reject_reason = 0;
  62     req->host->lmp_connection_complete(link);
  63 }
  64
  65 static void bt_dummy_lmp_disconnect_slave(struct bt_link_s *link)
  66 {
  67     g_free(link);
  68 }
  69
  70 static void bt_dummy_destroy(struct bt_device_s *device)
  71 {
  72     bt_device_done(device);
  73     g_free(device);
  74 }
  75
  76 static int bt_dev_idx = 0;
  77
  78 void bt_device_init(struct bt_device_s *dev, struct bt_scatternet_s *net)
  79 {
  80     memset(dev, 0, sizeof(*dev));
  81     dev->inquiry_scan = 1;
  82     dev->page_scan = 1;
  83
  84     dev->bd_addr.b[0] = bt_dev_idx & 0xff;
  85     dev->bd_addr.b[1] = bt_dev_idx >> 8;
  86     dev->bd_addr.b[2] = 0xd0;
  87     dev->bd_addr.b[3] = 0xba;
  88     dev->bd_addr.b[4] = 0xbe;
  89     dev->bd_addr.b[5] = 0xba;
  90     bt_dev_idx ++;
  91
  92     /* Simple slave-only devices need to implement only .lmp_acl_data */
  93     dev->lmp_connection_complete = bt_dummy_lmp_connection_complete;
  94     dev->lmp_disconnect_master = bt_dummy_lmp_disconnect_master;
  95     dev->lmp_acl_resp = bt_dummy_lmp_acl_resp;
  96     dev->lmp_mode_change = bt_dummy_lmp_mode_change;
  97     dev->lmp_connection_request = bt_dummy_lmp_connection_request;
  98     dev->lmp_disconnect_slave = bt_dummy_lmp_disconnect_slave;
  99
 100     dev->handle_destroy = bt_dummy_destroy;
 101
 102     dev->net = net;
 103     dev->next = net->slave;
 104     net->slave = dev;
 105 }
 106
 107 void bt_device_done(struct bt_device_s *dev)
 108 {
 109     struct bt_device_s **p = &dev->net->slave;
 110
 111     while (*p && *p != dev)
 112         p = &(*p)->next;
 113     if (*p != dev) {
 114         error_report("%s: bad bt device \"%s\"", __func__,
 115                      dev->lmp_name ?: "(null)");
 116         exit(-1);
 117     }
 118
 119     *p = dev->next;
 120 }
 121
 122 static struct bt_vlan_s {
 123     struct bt_scatternet_s net;
 124     int id;
 125     struct bt_vlan_s *next;
 126 } *first_bt_vlan;
 127
 128 /* find or alloc a new bluetooth "VLAN" */
 129 struct bt_scatternet_s *qemu_find_bt_vlan(int id)
 130 {
 131     struct bt_vlan_s **pvlan, *vlan;
 132     for (vlan = first_bt_vlan; vlan != NULL; vlan = vlan->next) {
 133         if (vlan->id == id)
 134             return &vlan->net;
 135     }
 136     vlan = g_malloc0(sizeof(struct bt_vlan_s));
 137     vlan->id = id;
 138     pvlan = &first_bt_vlan;
 139     while (*pvlan != NULL)
 140         pvlan = &(*pvlan)->next;
 141     *pvlan = vlan;
 142     return &vlan->net;
 143 }