/*-
 * link_policy.c
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
 * 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: link_policy.c,v 1.3 2003/08/18 19:19:54 max Exp $
 */

#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "hccontrol.h"

/* Send Role Discovery to the unit */
static int
hci_role_discovery(int s, int argc, char **argv)
{
        ng_hci_role_discovery_cp        cp;
        ng_hci_role_discovery_rp        rp;
        int                             n;

        /* parse command parameters */
        switch (argc) {
        case 1:
                /* connection handle */
                if (sscanf(argv[0], "%d", &n) != 1 || n <= 0 || n > 0x0eff)
                        return (USAGE);

                cp.con_handle = (uint16_t) (n & 0x0fff);
                cp.con_handle = htole16(cp.con_handle);
                break;

        default:
                return (USAGE);
        }

        /* send request */
        n = sizeof(rp);
        if (hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LINK_POLICY,
                        NG_HCI_OCF_ROLE_DISCOVERY), 
                        (char const *) &cp, sizeof(cp), 
                        (char *) &rp, &n) == ERROR)
                return (ERROR);

        if (rp.status != 0x00) {
                fprintf(stdout, "Status: %s [%#02x]\n", 
                        hci_status2str(rp.status), rp.status);
                return (FAILED);
        }

        fprintf(stdout, "Connection handle: %d\n", le16toh(rp.con_handle));
        fprintf(stdout, "Role: %s [%#x]\n",
                (rp.role == NG_HCI_ROLE_MASTER)? "Master" : "Slave", rp.role);

        return (OK);
} /* hci_role_discovery */

/* Send Switch Role to the unit */
static int
hci_switch_role(int s, int argc, char **argv)
{
        int                      n0;
        char                     b[512];
        ng_hci_switch_role_cp    cp;
        ng_hci_event_pkt_t      *e = (ng_hci_event_pkt_t *) b; 

        /* parse command parameters */
        switch (argc) {
        case 2:
                /* bdaddr */
                if (!bt_aton(argv[0], &cp.bdaddr)) {
                        struct hostent  *he = NULL;

                        if ((he = bt_gethostbyname(argv[0])) == NULL)
                                return (USAGE);

                        memcpy(&cp.bdaddr, he->h_addr, sizeof(cp.bdaddr));
                }

                /* role */
                if (sscanf(argv[1], "%d", &n0) != 1)
                        return (USAGE);

                cp.role = n0? NG_HCI_ROLE_SLAVE : NG_HCI_ROLE_MASTER;
                break;

        default:
                return (USAGE);
        }

        /* send request and expect status response */
        n0 = sizeof(b);
        if (hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LINK_POLICY,
                        NG_HCI_OCF_SWITCH_ROLE),
                        (char const *) &cp, sizeof(cp), b, &n0) == ERROR)
                return (ERROR);

        if (*b != 0x00)
                return (FAILED);

        /* wait for event */
again:
        n0 = sizeof(b);
        if (hci_recv(s, b, &n0) == ERROR)
                return (ERROR);
        if (n0 < sizeof(*e)) {
                errno = EIO;
                return (ERROR);
        }

        if (e->event == NG_HCI_EVENT_ROLE_CHANGE) {
                ng_hci_role_change_ep   *ep = (ng_hci_role_change_ep *)(e + 1);

                if (ep->status != 0x00) {
                        fprintf(stdout, "Status: %s [%#02x]\n", 
                                hci_status2str(ep->status), ep->status);
                        return (FAILED);
                }

                fprintf(stdout, "BD_ADDR: %s\n", hci_bdaddr2str(&ep->bdaddr));
                fprintf(stdout, "Role: %s [%#x]\n",
                        (ep->role == NG_HCI_ROLE_MASTER)? "Master" : "Slave",
                        ep->role);
        } else
                goto again;

        return (OK);
} /* hci_switch_role */

/* Send Read_Link_Policy_Settings command to the unit */
static int
hci_read_link_policy_settings(int s, int argc, char **argv)
{
        ng_hci_read_link_policy_settings_cp     cp;
        ng_hci_read_link_policy_settings_rp     rp;
        int                                     n;

        /* parse command parameters */
        switch (argc) {
        case 1:
                /* connection handle */
                if (sscanf(argv[0], "%d", &n) != 1 || n <= 0 || n > 0x0eff)
                        return (USAGE);

                cp.con_handle = (uint16_t) (n & 0x0fff);
                cp.con_handle = htole16(cp.con_handle);
                break;

        default:
                return (USAGE);
        }

        /* send request */
        n = sizeof(rp);
        if (hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LINK_POLICY,
                        NG_HCI_OCF_READ_LINK_POLICY_SETTINGS), 
                        (char const *) &cp, sizeof(cp), 
                        (char *) &rp, &n) == ERROR)
                return (ERROR);

        if (rp.status != 0x00) {
                fprintf(stdout, "Status: %s [%#02x]\n", 
                        hci_status2str(rp.status), rp.status);
                return (FAILED);
        }

        fprintf(stdout, "Connection handle: %d\n", le16toh(rp.con_handle));
        fprintf(stdout, "Link policy settings: %#x\n", le16toh(rp.settings));

        return (OK);
} /* hci_read_link_policy_settings */

/* Send Write_Link_Policy_Settings command to the unit */
static int
hci_write_link_policy_settings(int s, int argc, char **argv)
{
        ng_hci_write_link_policy_settings_cp    cp;
        ng_hci_write_link_policy_settings_rp    rp;
        int                                     n;

        /* parse command parameters */
        switch (argc) {
        case 2:
                /* connection handle */
                if (sscanf(argv[0], "%d", &n) != 1 || n <= 0 || n > 0x0eff)
                        return (USAGE);

                cp.con_handle = (uint16_t) (n & 0x0fff);
                cp.con_handle = htole16(cp.con_handle);

                /* link policy settings */
                if (sscanf(argv[1], "%x", &n) != 1)
                        return (USAGE);

                cp.settings = (uint16_t) (n & 0x0ffff);
                cp.settings = htole16(cp.settings);
                break;

        default:
                return (USAGE);
        }

        /* send request */
        n = sizeof(rp);
        if (hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LINK_POLICY,
                        NG_HCI_OCF_WRITE_LINK_POLICY_SETTINGS), 
                        (char const *) &cp, sizeof(cp), 
                        (char *) &rp, &n) == ERROR)
                return (ERROR);

        if (rp.status != 0x00) {
                fprintf(stdout, "Status: %s [%#02x]\n", 
                        hci_status2str(rp.status), rp.status);
                return (FAILED);
        }

        return (OK);
} /* hci_write_link_policy_settings */

struct hci_command      link_policy_commands[] = {
{
"role_discovery <connection_handle>",
"\nThe Role_Discovery command is used for a Bluetooth device to determine\n" \
"which role the device is performing for a particular Connection Handle.\n" \
"The connection handle must be a connection handle for an ACL connection.\n\n" \
"\t<connection_handle> - dddd; connection handle",
&hci_role_discovery
},
{
"switch_role <BD_ADDR> <role>",
"\nThe Switch_Role command is used for a Bluetooth device to switch the\n" \
"current role the device is performing for a particular connection with\n" \
"another specified Bluetooth device. The BD_ADDR command parameter indicates\n"\
"for which connection the role switch is to be performed. The Role indicates\n"\
"the requested new role that the local device performs. Note: the BD_ADDR\n" \
"command parameter must specify a Bluetooth device for which a connection\n"
"already exists.\n\n" \
"\t<BD_ADDR> - xx:xx:xx:xx:xx:xx BD_ADDR or name\n" \
"\t<role>    - dd; role; 0 - Master, 1 - Slave",
&hci_switch_role
},
{
"read_link_policy_settings <connection_handle>",
"\nThis command will read the Link Policy setting for the specified connection\n"\
"handle. The link policy settings parameter determines the behavior of the\n" \
"local Link Manager when it receives a request from a remote device or it\n" \
"determines itself to change the master-slave role or to enter the hold,\n" \
"sniff, or park mode. The local Link Manager will automatically accept or\n" \
"reject such a request from the remote device, and may even autonomously\n" \
"request itself, depending on the value of the link policy settings parameter\n"\
"for the corresponding connection handle. The connection handle must be a\n" \
"connection handle for an ACL connection.\n\n" \
"\t<connection_handle> - dddd; connection handle",
&hci_read_link_policy_settings
},
{
"write_link_policy_settings <connection_handle> <settings>",
"\nThis command will write the Link Policy setting for the specified connection\n"\
"handle. The link policy settings parameter determines the behavior of the\n" \
"local Link Manager when it receives a request from a remote device or it\n" \
"determines itself to change the master-slave role or to enter the hold,\n" \
"sniff, or park mode. The local Link Manager will automatically accept or\n" \
"reject such a request from the remote device, and may even autonomously\n" \
"request itself, depending on the value of the link policy settings parameter\n"\
"for the corresponding connection handle. The connection handle must be a\n" \
"connection handle for an ACL connection. Multiple Link Manager policies may\n"\
"be specified for the link policy settings parameter by performing a bitwise\n"\
"OR operation of the different activity types.\n\n" \
"\t<connection_handle> - dddd; connection handle\n" \
"\t<settings>          - xxxx; settings\n" \
"\t\t0x0000 - Disable All LM Modes (Default)\n" \
"\t\t0x0001 - Enable Master Slave Switch\n" \
"\t\t0x0002 - Enable Hold Mode\n" \
"\t\t0x0004 - Enable Sniff Mode\n" \
"\t\t0x0008 - Enable Park Mode\n",
&hci_write_link_policy_settings
},
{
NULL,
}};