1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
450 lines
12 KiB
C
450 lines
12 KiB
C
/*-
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* hcsecd.c
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*
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2001-2002 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: hcsecd.c,v 1.6 2003/08/18 19:19:55 max Exp $
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* $FreeBSD$
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*/
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#include <sys/queue.h>
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#define L2CAP_SOCKET_CHECKED
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#include <bluetooth.h>
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#include <err.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdarg.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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#include <syslog.h>
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#include <unistd.h>
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#include "hcsecd.h"
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static int done = 0;
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static int process_pin_code_request_event
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(int sock, struct sockaddr_hci *addr, bdaddr_p bdaddr);
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static int process_link_key_request_event
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(int sock, struct sockaddr_hci *addr, bdaddr_p bdaddr);
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static int send_pin_code_reply
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(int sock, struct sockaddr_hci *addr, bdaddr_p bdaddr, char const *pin);
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static int send_link_key_reply
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(int sock, struct sockaddr_hci *addr, bdaddr_p bdaddr, uint8_t *key);
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static int process_link_key_notification_event
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(int sock, struct sockaddr_hci *addr, ng_hci_link_key_notification_ep *ep);
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static void sighup
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(int s);
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static void sigint
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(int s);
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static void usage
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(void);
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/* Main */
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int
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main(int argc, char *argv[])
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{
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int n, detach, sock;
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socklen_t size;
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struct sigaction sa;
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struct sockaddr_hci addr;
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struct ng_btsocket_hci_raw_filter filter;
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char buffer[HCSECD_BUFFER_SIZE];
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ng_hci_event_pkt_t *event = NULL;
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detach = 1;
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while ((n = getopt(argc, argv, "df:h")) != -1) {
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switch (n) {
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case 'd':
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detach = 0;
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break;
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case 'f':
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config_file = optarg;
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break;
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case 'h':
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default:
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usage();
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/* NOT REACHED */
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}
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}
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if (config_file == NULL)
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usage();
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/* NOT REACHED */
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if (getuid() != 0)
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errx(1, "** ERROR: You should run %s as privileged user!",
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HCSECD_IDENT);
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/* Set signal handlers */
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memset(&sa, 0, sizeof(sa));
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sa.sa_handler = sigint;
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sa.sa_flags = SA_NOCLDWAIT;
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if (sigaction(SIGINT, &sa, NULL) < 0)
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err(1, "Could not sigaction(SIGINT)");
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if (sigaction(SIGTERM, &sa, NULL) < 0)
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err(1, "Could not sigaction(SIGINT)");
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memset(&sa, 0, sizeof(sa));
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sa.sa_handler = sighup;
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if (sigaction(SIGHUP, &sa, NULL) < 0)
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err(1, "Could not sigaction(SIGHUP)");
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/* Open socket and set filter */
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sock = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
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if (sock < 0)
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err(1, "Could not create HCI socket");
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memset(&filter, 0, sizeof(filter));
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bit_set(filter.event_mask, NG_HCI_EVENT_PIN_CODE_REQ - 1);
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bit_set(filter.event_mask, NG_HCI_EVENT_LINK_KEY_REQ - 1);
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bit_set(filter.event_mask, NG_HCI_EVENT_LINK_KEY_NOTIFICATION - 1);
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if (setsockopt(sock, SOL_HCI_RAW, SO_HCI_RAW_FILTER,
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(void * const) &filter, sizeof(filter)) < 0)
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err(1, "Could not set HCI socket filter");
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if (detach && daemon(0, 0) < 0)
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err(1, "Could not daemon()ize");
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openlog(HCSECD_IDENT, LOG_NDELAY|LOG_PERROR|LOG_PID, LOG_DAEMON);
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read_config_file();
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read_keys_file();
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if (detach) {
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FILE *pid = NULL;
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if ((pid = fopen(HCSECD_PIDFILE, "w")) == NULL) {
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syslog(LOG_ERR, "Could not create PID file %s. %s (%d)",
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HCSECD_PIDFILE, strerror(errno), errno);
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exit(1);
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}
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fprintf(pid, "%d", getpid());
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fclose(pid);
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}
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event = (ng_hci_event_pkt_t *) buffer;
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while (!done) {
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size = sizeof(addr);
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n = recvfrom(sock, buffer, sizeof(buffer), 0,
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(struct sockaddr *) &addr, &size);
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if (n < 0) {
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if (errno == EINTR)
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continue;
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syslog(LOG_ERR, "Could not receive from HCI socket. " \
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"%s (%d)", strerror(errno), errno);
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exit(1);
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}
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if (event->type != NG_HCI_EVENT_PKT) {
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syslog(LOG_ERR, "Received unexpected HCI packet, " \
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"type=%#x", event->type);
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continue;
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}
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switch (event->event) {
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case NG_HCI_EVENT_PIN_CODE_REQ:
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process_pin_code_request_event(sock, &addr,
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(bdaddr_p)(event + 1));
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break;
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case NG_HCI_EVENT_LINK_KEY_REQ:
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process_link_key_request_event(sock, &addr,
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(bdaddr_p)(event + 1));
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break;
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case NG_HCI_EVENT_LINK_KEY_NOTIFICATION:
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process_link_key_notification_event(sock, &addr,
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(ng_hci_link_key_notification_ep *)(event + 1));
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break;
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default:
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syslog(LOG_ERR, "Received unexpected HCI event, " \
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"event=%#x", event->event);
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break;
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}
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}
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if (detach)
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if (remove(HCSECD_PIDFILE) < 0)
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syslog(LOG_ERR, "Could not remove PID file %s. %s (%d)",
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HCSECD_PIDFILE, strerror(errno), errno);
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dump_keys_file();
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clean_config();
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closelog();
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close(sock);
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return (0);
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}
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/* Process PIN_Code_Request event */
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static int
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process_pin_code_request_event(int sock, struct sockaddr_hci *addr,
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bdaddr_p bdaddr)
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{
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link_key_p key = NULL;
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syslog(LOG_DEBUG, "Got PIN_Code_Request event from '%s', " \
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"remote bdaddr %s", addr->hci_node,
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bt_ntoa(bdaddr, NULL));
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if ((key = get_key(bdaddr, 0)) != NULL) {
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syslog(LOG_DEBUG, "Found matching entry, " \
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"remote bdaddr %s, name '%s', PIN code %s",
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bt_ntoa(&key->bdaddr, NULL),
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(key->name != NULL)? key->name : "No name",
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(key->pin != NULL)? "exists" : "doesn't exist");
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return (send_pin_code_reply(sock, addr, bdaddr, key->pin));
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}
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syslog(LOG_DEBUG, "Could not PIN code for remote bdaddr %s",
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bt_ntoa(bdaddr, NULL));
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return (send_pin_code_reply(sock, addr, bdaddr, NULL));
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}
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/* Process Link_Key_Request event */
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static int
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process_link_key_request_event(int sock, struct sockaddr_hci *addr,
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bdaddr_p bdaddr)
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{
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link_key_p key = NULL;
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syslog(LOG_DEBUG, "Got Link_Key_Request event from '%s', " \
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"remote bdaddr %s", addr->hci_node,
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bt_ntoa(bdaddr, NULL));
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if ((key = get_key(bdaddr, 0)) != NULL) {
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syslog(LOG_DEBUG, "Found matching entry, " \
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"remote bdaddr %s, name '%s', link key %s",
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bt_ntoa(&key->bdaddr, NULL),
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(key->name != NULL)? key->name : "No name",
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(key->key != NULL)? "exists" : "doesn't exist");
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return (send_link_key_reply(sock, addr, bdaddr, key->key));
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}
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syslog(LOG_DEBUG, "Could not find link key for remote bdaddr %s",
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bt_ntoa(bdaddr, NULL));
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return (send_link_key_reply(sock, addr, bdaddr, NULL));
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}
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/* Send PIN_Code_[Negative]_Reply */
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static int
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send_pin_code_reply(int sock, struct sockaddr_hci *addr,
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bdaddr_p bdaddr, char const *pin)
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{
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uint8_t buffer[HCSECD_BUFFER_SIZE];
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ng_hci_cmd_pkt_t *cmd = NULL;
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memset(buffer, 0, sizeof(buffer));
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cmd = (ng_hci_cmd_pkt_t *) buffer;
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cmd->type = NG_HCI_CMD_PKT;
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if (pin != NULL) {
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ng_hci_pin_code_rep_cp *cp = NULL;
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cmd->opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
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NG_HCI_OCF_PIN_CODE_REP));
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cmd->length = sizeof(*cp);
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cp = (ng_hci_pin_code_rep_cp *)(cmd + 1);
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memcpy(&cp->bdaddr, bdaddr, sizeof(cp->bdaddr));
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strncpy((char *) cp->pin, pin, sizeof(cp->pin));
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cp->pin_size = strlen((char const *) cp->pin);
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syslog(LOG_DEBUG, "Sending PIN_Code_Reply to '%s' " \
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"for remote bdaddr %s",
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addr->hci_node, bt_ntoa(bdaddr, NULL));
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} else {
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ng_hci_pin_code_neg_rep_cp *cp = NULL;
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cmd->opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
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NG_HCI_OCF_PIN_CODE_NEG_REP));
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cmd->length = sizeof(*cp);
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cp = (ng_hci_pin_code_neg_rep_cp *)(cmd + 1);
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memcpy(&cp->bdaddr, bdaddr, sizeof(cp->bdaddr));
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syslog(LOG_DEBUG, "Sending PIN_Code_Negative_Reply to '%s' " \
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"for remote bdaddr %s",
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addr->hci_node, bt_ntoa(bdaddr, NULL));
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}
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again:
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if (sendto(sock, buffer, sizeof(*cmd) + cmd->length, 0,
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(struct sockaddr *) addr, sizeof(*addr)) < 0) {
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if (errno == EINTR)
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goto again;
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syslog(LOG_ERR, "Could not send PIN code reply to '%s' " \
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"for remote bdaddr %s. %s (%d)",
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addr->hci_node, bt_ntoa(bdaddr, NULL),
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strerror(errno), errno);
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return (-1);
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}
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return (0);
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}
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/* Send Link_Key_[Negative]_Reply */
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static int
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send_link_key_reply(int sock, struct sockaddr_hci *addr,
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bdaddr_p bdaddr, uint8_t *key)
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{
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uint8_t buffer[HCSECD_BUFFER_SIZE];
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ng_hci_cmd_pkt_t *cmd = NULL;
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memset(buffer, 0, sizeof(buffer));
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cmd = (ng_hci_cmd_pkt_t *) buffer;
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cmd->type = NG_HCI_CMD_PKT;
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if (key != NULL) {
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ng_hci_link_key_rep_cp *cp = NULL;
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cmd->opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
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NG_HCI_OCF_LINK_KEY_REP));
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cmd->length = sizeof(*cp);
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cp = (ng_hci_link_key_rep_cp *)(cmd + 1);
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memcpy(&cp->bdaddr, bdaddr, sizeof(cp->bdaddr));
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memcpy(&cp->key, key, sizeof(cp->key));
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syslog(LOG_DEBUG, "Sending Link_Key_Reply to '%s' " \
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"for remote bdaddr %s",
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addr->hci_node, bt_ntoa(bdaddr, NULL));
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} else {
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ng_hci_link_key_neg_rep_cp *cp = NULL;
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cmd->opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
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NG_HCI_OCF_LINK_KEY_NEG_REP));
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cmd->length = sizeof(*cp);
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cp = (ng_hci_link_key_neg_rep_cp *)(cmd + 1);
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memcpy(&cp->bdaddr, bdaddr, sizeof(cp->bdaddr));
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syslog(LOG_DEBUG, "Sending Link_Key_Negative_Reply to '%s' " \
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"for remote bdaddr %s",
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addr->hci_node, bt_ntoa(bdaddr, NULL));
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}
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again:
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if (sendto(sock, buffer, sizeof(*cmd) + cmd->length, 0,
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(struct sockaddr *) addr, sizeof(*addr)) < 0) {
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if (errno == EINTR)
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goto again;
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syslog(LOG_ERR, "Could not send link key reply to '%s' " \
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"for remote bdaddr %s. %s (%d)",
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addr->hci_node, bt_ntoa(bdaddr, NULL),
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strerror(errno), errno);
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return (-1);
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}
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return (0);
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}
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/* Process Link_Key_Notification event */
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static int
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process_link_key_notification_event(int sock, struct sockaddr_hci *addr,
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ng_hci_link_key_notification_ep *ep)
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{
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link_key_p key = NULL;
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syslog(LOG_DEBUG, "Got Link_Key_Notification event from '%s', " \
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"remote bdaddr %s", addr->hci_node,
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bt_ntoa(&ep->bdaddr, NULL));
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if ((key = get_key(&ep->bdaddr, 1)) == NULL) {
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syslog(LOG_ERR, "Could not find entry for remote bdaddr %s",
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bt_ntoa(&ep->bdaddr, NULL));
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return (-1);
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}
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syslog(LOG_DEBUG, "Updating link key for the entry, " \
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"remote bdaddr %s, name '%s', link key %s",
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bt_ntoa(&key->bdaddr, NULL),
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(key->name != NULL)? key->name : "No name",
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(key->key != NULL)? "exists" : "doesn't exist");
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if (key->key == NULL) {
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key->key = (uint8_t *) malloc(NG_HCI_KEY_SIZE);
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if (key->key == NULL) {
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syslog(LOG_ERR, "Could not allocate link key");
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exit(1);
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}
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}
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memcpy(key->key, &ep->key, NG_HCI_KEY_SIZE);
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return (0);
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}
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/* Signal handlers */
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static void
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sighup(int s)
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{
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syslog(LOG_DEBUG, "Got SIGHUP (%d)", s);
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dump_keys_file();
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read_config_file();
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read_keys_file();
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}
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static void
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sigint(int s)
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{
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syslog(LOG_DEBUG, "Got signal %d, total number of signals %d",
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s, ++ done);
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}
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/* Display usage and exit */
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static void
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usage(void)
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{
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fprintf(stderr,
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"Usage: %s [-d] -f config_file [-h]\n" \
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"Where:\n" \
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"\t-d do not detach from terminal\n" \
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"\t-f config_file use <config_file>\n" \
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"\t-h display this message\n", HCSECD_IDENT);
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exit(255);
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}
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