/*-
 * hccontrol.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: hccontrol.c,v 1.5 2003/09/05 00:38:24 max Exp $
 */

#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <netgraph/ng_message.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "hccontrol.h"

/* Prototypes */
static int                  do_hci_command    (char const *, int, char **);
static struct hci_command * find_hci_command  (char const *, struct hci_command *);
static int                  find_hci_nodes    (struct nodeinfo **);
static void                 print_hci_command (struct hci_command *);
static void usage                             (void);

/* Globals */
int      verbose = 0; 
int      timeout;
int      numeric_bdaddr = 0;

/* Main */
int
main(int argc, char *argv[])
{
        char    *node = NULL;
        int      n;

        /* Process command line arguments */
        while ((n = getopt(argc, argv, "n:Nvh")) != -1) {
                switch (n) {
                case 'n':
                        node = optarg;
                        break;

                case 'N':
                        numeric_bdaddr = 1;
                        break;

                case 'v':
                        verbose = 1;
                        break;

                case 'h':
                default:
                        usage();
                }
        }

        argc -= optind;
        argv += optind;

        if (*argv == NULL)
                usage();

        n = do_hci_command(node, argc, argv);

        return (n);
} /* main */

/* Create socket and bind it */
static int
socket_open(char const *node)
{
        struct sockaddr_hci                      addr;
        struct ng_btsocket_hci_raw_filter        filter;
        int                                      s, mib[4], num;
        size_t                                   size;
        struct nodeinfo                         *nodes;
        char                                    *lnode = NULL;

        num = find_hci_nodes(&nodes);
        if (num == 0)
                errx(7, "Could not find HCI nodes");

        if (node == NULL) {
                node = lnode = strdup(nodes[0].name);
                if (num > 1)
                        fprintf(stdout, "Using HCI node: %s\n", node);
        }

        free(nodes);

        s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
        if (s < 0)
                err(1, "Could not create socket");

        memset(&addr, 0, sizeof(addr));
        addr.hci_len = sizeof(addr);
        addr.hci_family = AF_BLUETOOTH;
        strncpy(addr.hci_node, node, sizeof(addr.hci_node));
        if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0)
                err(2, "Could not bind socket, node=%s", node);

        if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0)
                err(3, "Could not connect socket, node=%s", node);

        free(lnode);
        memset(&filter, 0, sizeof(filter));
        bit_set(filter.event_mask, NG_HCI_EVENT_COMMAND_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_COMMAND_STATUS - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_INQUIRY_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_INQUIRY_RESULT - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_CON_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_DISCON_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_REMOTE_NAME_REQ_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_READ_REMOTE_FEATURES_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_READ_REMOTE_VER_INFO_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_RETURN_LINK_KEYS - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_READ_CLOCK_OFFSET_COMPL - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_CON_PKT_TYPE_CHANGED - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_ROLE_CHANGE - 1);
        bit_set(filter.event_mask, NG_HCI_EVENT_LE -1);

        if (setsockopt(s, SOL_HCI_RAW, SO_HCI_RAW_FILTER, 
                        (void * const) &filter, sizeof(filter)) < 0)
                err(4, "Could not setsockopt()");

        size = nitems(mib);
        if (sysctlnametomib("net.bluetooth.hci.command_timeout",mib,&size) < 0)
                err(5, "Could not sysctlnametomib()");

        if (sysctl(mib, nitems(mib),
                        (void *) &timeout, &size, NULL, 0) < 0)
                err(6, "Could not sysctl()");

        timeout ++;

        return (s);
} /* socket_open */

/* Execute commands */
static int
do_hci_command(char const *node, int argc, char **argv)
{
        char                    *cmd = argv[0];
        struct hci_command      *c = NULL;
        int                      s, e, help;
        
        help = 0;
        if (strcasecmp(cmd, "help") == 0) {
                argc --;
                argv ++;

                if (argc <= 0) {
                        fprintf(stdout, "Supported commands:\n");
                        print_hci_command(link_control_commands);
                        print_hci_command(link_policy_commands);
                        print_hci_command(host_controller_baseband_commands);
                        print_hci_command(info_commands);
                        print_hci_command(status_commands);
                        print_hci_command(le_commands);
                        print_hci_command(node_commands);
                        fprintf(stdout, "\nFor more information use " \
                                "'help command'\n");

                        return (OK);
                }

                help = 1;
                cmd = argv[0];
        }

        c = find_hci_command(cmd, link_control_commands);
        if (c != NULL)
                goto execute;

        c = find_hci_command(cmd, link_policy_commands);
        if (c != NULL)
                goto execute;

        c = find_hci_command(cmd, host_controller_baseband_commands);
        if (c != NULL)
                goto execute;

        c = find_hci_command(cmd, info_commands);
        if (c != NULL)
                goto execute;

        c = find_hci_command(cmd, status_commands);
        if (c != NULL)
                goto execute;

        c = find_hci_command(cmd, le_commands);
        if (c != NULL)
                goto execute;

        
        c = find_hci_command(cmd, node_commands);
        if (c == NULL) {
                fprintf(stdout, "Unknown command: \"%s\"\n", cmd);
                return (ERROR);
        }
execute:
        if (!help) {
                s = socket_open(node);
                e = (c->handler)(s, -- argc, ++ argv);
                close(s);
        } else
                e = USAGE;

        switch (e) {
        case OK:
        case FAILED:
                break;

        case ERROR:
                fprintf(stdout, "Could not execute command \"%s\". %s\n",
                        cmd, strerror(errno));
                break;

        case USAGE:
                fprintf(stdout, "Usage: %s\n%s\n", c->command, c->description);
                break;

        default: assert(0); break;
        }


        return (e);
} /* do_hci_command */

/* Try to find command in specified category */
static struct hci_command *
find_hci_command(char const *command, struct hci_command *category)
{
        struct hci_command      *c = NULL;

        for (c = category; c->command != NULL; c++) {
                char    *c_end = strchr(c->command, ' ');

                if (c_end != NULL) {
                        int     len = c_end - c->command;

                        if (strncasecmp(command, c->command, len) == 0)
                                return (c);
                } else if (strcasecmp(command, c->command) == 0)
                                return (c);
        }

        return (NULL);
} /* find_hci_command */

/* Find all HCI nodes */
static int
find_hci_nodes(struct nodeinfo** nodes)
{
        struct ng_btsocket_hci_raw_node_list_names      r;
        struct sockaddr_hci                             addr;
        int                                             s;
        const char *                                    node = "ubt0hci";

        r.num_names = MAX_NODE_NUM;
        r.names = (struct nodeinfo*)calloc(MAX_NODE_NUM, sizeof(struct nodeinfo));
        if (r.names == NULL)
                err(8, "Could not allocate memory");

        s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
        if (s < 0)
                err(9, "Could not create socket");

        memset(&addr, 0, sizeof(addr));
        addr.hci_len = sizeof(addr);
        addr.hci_family = AF_BLUETOOTH;
        strncpy(addr.hci_node, node, sizeof(addr.hci_node));
        if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0)
                err(10, "Could not bind socket");

        if (ioctl(s, SIOC_HCI_RAW_NODE_LIST_NAMES, &r, sizeof(r)) < 0)
                err(11, "Could not get list of HCI nodes");

        close(s);

        *nodes = r.names;

        return (r.num_names);
} /* find_hci_nodes */

/* Print commands in specified category */
static void
print_hci_command(struct hci_command *category)
{
        struct hci_command      *c = NULL;

        for (c = category; c->command != NULL; c++)
                fprintf(stdout, "\t%s\n", c->command);
} /* print_hci_command */

/* Usage */
static void
usage(void)
{
        fprintf(stdout, "Usage: hccontrol [-hN] [-n HCI_node_name] cmd [p1] [..]\n");
        exit(255);
} /* usage */