bluez/monitor/control.c

891 lines
18 KiB
C

/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2011-2012 Intel Corporation
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdbool.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "lib/bluetooth.h"
#include "lib/hci.h"
#include "lib/mgmt.h"
#include "mainloop.h"
#include "display.h"
#include "packet.h"
#include "btsnoop.h"
#include "hcidump.h"
#include "control.h"
static bool hcidump_fallback = false;
#define MAX_PACKET_SIZE (1486 + 4)
struct control_data {
uint16_t channel;
int fd;
unsigned char buf[MAX_PACKET_SIZE];
uint16_t offset;
};
static void free_data(void *user_data)
{
struct control_data *data = user_data;
close(data->fd);
free(data);
}
static void mgmt_index_added(uint16_t len, const void *buf)
{
printf("@ Index Added\n");
packet_hexdump(buf, len);
}
static void mgmt_index_removed(uint16_t len, const void *buf)
{
printf("@ Index Removed\n");
packet_hexdump(buf, len);
}
static void mgmt_controller_error(uint16_t len, const void *buf)
{
const struct mgmt_ev_controller_error *ev = buf;
if (len < sizeof(*ev)) {
printf("* Malformed Controller Error control\n");
return;
}
printf("@ Controller Error: 0x%2.2x\n", ev->error_code);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
#ifndef NELEM
#define NELEM(x) (sizeof(x) / sizeof((x)[0]))
#endif
static const char *settings_str[] = {
"powered", "connectable", "fast-connectable", "discoverable",
"pairable", "link-security", "ssp", "br/edr", "hs", "le",
"advertising",
};
static void mgmt_new_settings(uint16_t len, const void *buf)
{
uint32_t settings;
unsigned int i;
if (len < 4) {
printf("* Malformed New Settings control\n");
return;
}
settings = bt_get_le32(buf);
printf("@ New Settings: 0x%4.4x\n", settings);
printf("%-12c", ' ');
for (i = 0; i < NELEM(settings_str); i++) {
if (settings & (1 << i))
printf("%s ", settings_str[i]);
}
printf("\n");
buf += 4;
len -= 4;
packet_hexdump(buf, len);
}
static void mgmt_class_of_dev_changed(uint16_t len, const void *buf)
{
const struct mgmt_ev_class_of_dev_changed *ev = buf;
if (len < sizeof(*ev)) {
printf("* Malformed Class of Device Changed control\n");
return;
}
printf("@ Class of Device Changed: 0x%2.2x%2.2x%2.2x\n",
ev->class_of_dev[2],
ev->class_of_dev[1],
ev->class_of_dev[0]);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_local_name_changed(uint16_t len, const void *buf)
{
const struct mgmt_ev_local_name_changed *ev = buf;
if (len < sizeof(*ev)) {
printf("* Malformed Local Name Changed control\n");
return;
}
printf("@ Local Name Changed: %s (%s)\n", ev->name, ev->short_name);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_new_link_key(uint16_t len, const void *buf)
{
const struct mgmt_ev_new_link_key *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed New Link Key control\n");
return;
}
ba2str(&ev->key.addr.bdaddr, str);
printf("@ New Link Key: %s (%d)\n", str, ev->key.addr.type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_new_long_term_key(uint16_t len, const void *buf)
{
const struct mgmt_ev_new_long_term_key *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed New Long Term Key control\n");
return;
}
ba2str(&ev->key.addr.bdaddr, str);
printf("@ New Long Term Key: %s (%d)\n", str, ev->key.addr.type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_device_connected(uint16_t len, const void *buf)
{
const struct mgmt_ev_device_connected *ev = buf;
uint32_t flags;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Device Connected control\n");
return;
}
flags = btohl(ev->flags);
ba2str(&ev->addr.bdaddr, str);
printf("@ Device Connected: %s (%d) flags 0x%4.4x\n",
str, ev->addr.type, flags);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_device_disconnected(uint16_t len, const void *buf)
{
const struct mgmt_ev_device_disconnected *ev = buf;
char str[18];
uint8_t reason;
uint16_t consumed_len;
if (len < sizeof(struct mgmt_addr_info)) {
printf("* Malformed Device Disconnected control\n");
return;
}
if (len < sizeof(*ev)) {
reason = MGMT_DEV_DISCONN_UNKNOWN;
consumed_len = len;
} else {
reason = ev->reason;
consumed_len = sizeof(*ev);
}
ba2str(&ev->addr.bdaddr, str);
printf("@ Device Disconnected: %s (%d) reason %u\n", str, ev->addr.type,
reason);
buf += consumed_len;
len -= consumed_len;
packet_hexdump(buf, len);
}
static void mgmt_connect_failed(uint16_t len, const void *buf)
{
const struct mgmt_ev_connect_failed *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Connect Failed control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ Connect Failed: %s (%d) status 0x%2.2x\n",
str, ev->addr.type, ev->status);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_pin_code_request(uint16_t len, const void *buf)
{
const struct mgmt_ev_pin_code_request *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed PIN Code Request control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ PIN Code Request: %s (%d) secure 0x%2.2x\n",
str, ev->addr.type, ev->secure);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_user_confirm_request(uint16_t len, const void *buf)
{
const struct mgmt_ev_user_confirm_request *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed User Confirmation Request control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ User Confirmation Request: %s (%d) hint %d value %d\n",
str, ev->addr.type, ev->confirm_hint, ev->value);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_user_passkey_request(uint16_t len, const void *buf)
{
const struct mgmt_ev_user_passkey_request *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed User Passkey Request control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ PIN User Passkey Request: %s (%d)\n", str, ev->addr.type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_auth_failed(uint16_t len, const void *buf)
{
const struct mgmt_ev_auth_failed *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Authentication Failed control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ Authentication Failed: %s (%d) status 0x%2.2x\n",
str, ev->addr.type, ev->status);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_device_found(uint16_t len, const void *buf)
{
const struct mgmt_ev_device_found *ev = buf;
uint32_t flags;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Device Found control\n");
return;
}
flags = btohl(ev->flags);
ba2str(&ev->addr.bdaddr, str);
printf("@ Device Found: %s (%d) rssi %d flags 0x%4.4x\n",
str, ev->addr.type, ev->rssi, flags);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_discovering(uint16_t len, const void *buf)
{
const struct mgmt_ev_discovering *ev = buf;
if (len < sizeof(*ev)) {
printf("* Malformed Discovering control\n");
return;
}
printf("@ Discovering: 0x%2.2x (%d)\n", ev->discovering, ev->type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_device_blocked(uint16_t len, const void *buf)
{
const struct mgmt_ev_device_blocked *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Device Blocked control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ Device Blocked: %s (%d)\n", str, ev->addr.type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_device_unblocked(uint16_t len, const void *buf)
{
const struct mgmt_ev_device_unblocked *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Device Unblocked control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ Device Unblocked: %s (%d)\n", str, ev->addr.type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_device_unpaired(uint16_t len, const void *buf)
{
const struct mgmt_ev_device_unpaired *ev = buf;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Device Unpaired control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
printf("@ Device Unpaired: %s (%d)\n", str, ev->addr.type);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
static void mgmt_passkey_notify(uint16_t len, const void *buf)
{
const struct mgmt_ev_passkey_notify *ev = buf;
uint32_t passkey;
char str[18];
if (len < sizeof(*ev)) {
printf("* Malformed Passkey Notify control\n");
return;
}
ba2str(&ev->addr.bdaddr, str);
passkey = btohl(ev->passkey);
printf("@ Passkey Notify: %s (%d) passkey %06u entered %u\n",
str, ev->addr.type, passkey, ev->entered);
buf += sizeof(*ev);
len -= sizeof(*ev);
packet_hexdump(buf, len);
}
void control_message(uint16_t opcode, const void *data, uint16_t size)
{
switch (opcode) {
case MGMT_EV_INDEX_ADDED:
mgmt_index_added(size, data);
break;
case MGMT_EV_INDEX_REMOVED:
mgmt_index_removed(size, data);
break;
case MGMT_EV_CONTROLLER_ERROR:
mgmt_controller_error(size, data);
break;
case MGMT_EV_NEW_SETTINGS:
mgmt_new_settings(size, data);
break;
case MGMT_EV_CLASS_OF_DEV_CHANGED:
mgmt_class_of_dev_changed(size, data);
break;
case MGMT_EV_LOCAL_NAME_CHANGED:
mgmt_local_name_changed(size, data);
break;
case MGMT_EV_NEW_LINK_KEY:
mgmt_new_link_key(size, data);
break;
case MGMT_EV_NEW_LONG_TERM_KEY:
mgmt_new_long_term_key(size, data);
break;
case MGMT_EV_DEVICE_CONNECTED:
mgmt_device_connected(size, data);
break;
case MGMT_EV_DEVICE_DISCONNECTED:
mgmt_device_disconnected(size, data);
break;
case MGMT_EV_CONNECT_FAILED:
mgmt_connect_failed(size, data);
break;
case MGMT_EV_PIN_CODE_REQUEST:
mgmt_pin_code_request(size, data);
break;
case MGMT_EV_USER_CONFIRM_REQUEST:
mgmt_user_confirm_request(size, data);
break;
case MGMT_EV_USER_PASSKEY_REQUEST:
mgmt_user_passkey_request(size, data);
break;
case MGMT_EV_AUTH_FAILED:
mgmt_auth_failed(size, data);
break;
case MGMT_EV_DEVICE_FOUND:
mgmt_device_found(size, data);
break;
case MGMT_EV_DISCOVERING:
mgmt_discovering(size, data);
break;
case MGMT_EV_DEVICE_BLOCKED:
mgmt_device_blocked(size, data);
break;
case MGMT_EV_DEVICE_UNBLOCKED:
mgmt_device_unblocked(size, data);
break;
case MGMT_EV_DEVICE_UNPAIRED:
mgmt_device_unpaired(size, data);
break;
case MGMT_EV_PASSKEY_NOTIFY:
mgmt_passkey_notify(size, data);
break;
default:
printf("* Unknown control (code %d len %d)\n", opcode, size);
packet_hexdump(data, size);
break;
}
}
static void data_callback(int fd, uint32_t events, void *user_data)
{
struct control_data *data = user_data;
unsigned char control[32];
struct mgmt_hdr hdr;
struct msghdr msg;
struct iovec iov[2];
if (events & (EPOLLERR | EPOLLHUP)) {
mainloop_remove_fd(data->fd);
return;
}
iov[0].iov_base = &hdr;
iov[0].iov_len = MGMT_HDR_SIZE;
iov[1].iov_base = data->buf;
iov[1].iov_len = sizeof(data->buf);
memset(&msg, 0, sizeof(msg));
msg.msg_iov = iov;
msg.msg_iovlen = 2;
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
while (1) {
struct cmsghdr *cmsg;
struct timeval *tv = NULL;
struct timeval ctv;
uint16_t opcode, index, pktlen;
ssize_t len;
len = recvmsg(data->fd, &msg, MSG_DONTWAIT);
if (len < 0)
break;
if (len < MGMT_HDR_SIZE)
break;
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level != SOL_SOCKET)
continue;
if (cmsg->cmsg_type == SCM_TIMESTAMP) {
memcpy(&ctv, CMSG_DATA(cmsg), sizeof(ctv));
tv = &ctv;
}
}
opcode = btohs(hdr.opcode);
index = btohs(hdr.index);
pktlen = btohs(hdr.len);
switch (data->channel) {
case HCI_CHANNEL_CONTROL:
packet_control(tv, index, opcode, data->buf, pktlen);
break;
case HCI_CHANNEL_MONITOR:
packet_monitor(tv, index, opcode, data->buf, pktlen);
btsnoop_write_hci(tv, index, opcode, data->buf, pktlen);
break;
}
}
}
static int open_socket(uint16_t channel)
{
struct sockaddr_hci addr;
int fd, opt = 1;
fd = socket(AF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC, BTPROTO_HCI);
if (fd < 0) {
perror("Failed to open channel");
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.hci_family = AF_BLUETOOTH;
addr.hci_dev = HCI_DEV_NONE;
addr.hci_channel = channel;
if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
if (errno == EINVAL) {
/* Fallback to hcidump support */
hcidump_fallback = true;
close(fd);
return -1;
}
perror("Failed to bind channel");
close(fd);
return -1;
}
if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, &opt, sizeof(opt)) < 0) {
perror("Failed to enable timestamps");
close(fd);
return -1;
}
return fd;
}
static int open_channel(uint16_t channel)
{
struct control_data *data;
data = malloc(sizeof(*data));
if (!data)
return -1;
memset(data, 0, sizeof(*data));
data->channel = channel;
data->fd = open_socket(channel);
if (data->fd < 0) {
free(data);
return -1;
}
mainloop_add_fd(data->fd, EPOLLIN, data_callback, data, free_data);
return 0;
}
static void client_callback(int fd, uint32_t events, void *user_data)
{
struct control_data *data = user_data;
ssize_t len;
if (events & (EPOLLERR | EPOLLHUP)) {
mainloop_remove_fd(data->fd);
return;
}
len = recv(data->fd, data->buf + data->offset,
sizeof(data->buf) - data->offset, MSG_DONTWAIT);
if (len < 0)
return;
data->offset += len;
if (data->offset > MGMT_HDR_SIZE) {
struct mgmt_hdr *hdr = (struct mgmt_hdr *) data->buf;
uint16_t pktlen = btohs(hdr->len);
if (data->offset > pktlen + MGMT_HDR_SIZE) {
uint16_t opcode = btohs(hdr->opcode);
uint16_t index = btohs(hdr->index);
packet_monitor(NULL, index, opcode,
data->buf + MGMT_HDR_SIZE, pktlen);
data->offset -= pktlen + MGMT_HDR_SIZE;
if (data->offset > 0)
memmove(data->buf, data->buf +
MGMT_HDR_SIZE + pktlen, data->offset);
}
}
}
static void server_accept_callback(int fd, uint32_t events, void *user_data)
{
struct control_data *data;
struct sockaddr_un addr;
socklen_t len;
int nfd;
if (events & (EPOLLERR | EPOLLHUP)) {
mainloop_remove_fd(fd);
return;
}
memset(&addr, 0, sizeof(addr));
len = sizeof(addr);
nfd = accept(fd, (struct sockaddr *) &addr, &len);
if (nfd < 0) {
perror("Failed to accept client socket");
return;
}
printf("--- New monitor connection ---\n");
data = malloc(sizeof(*data));
if (!data) {
close(nfd);
return;
}
memset(data, 0, sizeof(*data));
data->channel = HCI_CHANNEL_MONITOR;
data->fd = nfd;
mainloop_add_fd(data->fd, EPOLLIN, client_callback, data, free_data);
}
static int server_fd = -1;
void control_server(const char *path)
{
struct sockaddr_un addr;
int fd;
if (server_fd >= 0)
return;
unlink(path);
fd = socket(PF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (fd < 0) {
perror("Failed to open server socket");
return;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, path);
if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("Failed to bind server socket");
close(fd);
return;
}
if (listen(fd, 5) < 0) {
perror("Failed to listen server socket");
close(fd);
return;
}
if (mainloop_add_fd(fd, EPOLLIN, server_accept_callback,
NULL, NULL) < 0) {
close(fd);
return;
}
server_fd = fd;
}
void control_writer(const char *path)
{
btsnoop_create(path, BTSNOOP_TYPE_EXTENDED_HCI);
}
void control_reader(const char *path)
{
unsigned char buf[MAX_PACKET_SIZE];
uint16_t pktlen;
uint32_t type;
struct timeval tv;
if (btsnoop_open(path, &type) < 0)
return;
switch (type) {
case BTSNOOP_TYPE_HCI:
case BTSNOOP_TYPE_UART:
case BTSNOOP_TYPE_EXTENDED_PHY:
packet_del_filter(PACKET_FILTER_SHOW_INDEX);
break;
case BTSNOOP_TYPE_EXTENDED_HCI:
packet_add_filter(PACKET_FILTER_SHOW_INDEX);
break;
}
open_pager();
switch (type) {
case BTSNOOP_TYPE_HCI:
case BTSNOOP_TYPE_UART:
case BTSNOOP_TYPE_EXTENDED_HCI:
while (1) {
uint16_t index, opcode;
if (btsnoop_read_hci(&tv, &index, &opcode,
buf, &pktlen) < 0)
break;
packet_monitor(&tv, index, opcode, buf, pktlen);
}
break;
case BTSNOOP_TYPE_EXTENDED_PHY:
while (1) {
uint16_t frequency;
if (btsnoop_read_phy(&tv, &frequency,
buf, &pktlen) < 0)
break;
packet_simulator(&tv, frequency, buf, pktlen);
}
break;
}
close_pager();
btsnoop_close();
}
int control_tracing(void)
{
packet_add_filter(PACKET_FILTER_SHOW_INDEX);
if (server_fd >= 0)
return 0;
if (open_channel(HCI_CHANNEL_MONITOR) < 0) {
if (!hcidump_fallback)
return -1;
if (hcidump_tracing() < 0)
return -1;
return 0;
}
open_channel(HCI_CHANNEL_CONTROL);
return 0;
}