/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; 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
#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <inttypes.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <signal.h>
#include <sys/socket.h>
#include "lib/bluetooth.h"
#include "lib/hci.h"
#include "src/shared/util.h"
#include "src/shared/log.h"
struct log_hdr {
uint16_t opcode;
uint16_t index;
uint16_t len;
uint8_t priority;
uint8_t ident_len;
} __attribute__((packed));
struct log_l2cap_hdr {
uint16_t cid;
uint16_t psm;
} __attribute__((packed));
static int log_fd = -1;
int bt_log_sendmsg(uint16_t index, const char *label, int level,
struct iovec *io, size_t io_len)
{
struct log_hdr hdr;
struct msghdr msg;
struct iovec iov[5];
size_t i;
int err;
if (io_len > 3)
return -EMSGSIZE;
log_fd = bt_log_open();
if (log_fd < 0)
return log_fd;
hdr.opcode = cpu_to_le16(0x0000);
hdr.index = cpu_to_le16(index);
hdr.ident_len = strlen(label) + 1;
hdr.len = cpu_to_le16(2 + hdr.ident_len);
hdr.priority = level;
iov[0].iov_base = &hdr;
iov[0].iov_len = sizeof(hdr);
iov[1].iov_base = (void *) label;
iov[1].iov_len = hdr.ident_len;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = iov;
msg.msg_iovlen = 2;
for (i = 0; i < io_len; i++) {
iov[i + 2] = io[i];
hdr.len += io[i].iov_len;
msg.msg_iovlen++;
}
err = sendmsg(log_fd, &msg, 0);
if (err < 0) {
err = -errno;
close(log_fd);
log_fd = -1;
}
return err;
}
int bt_log_open(void)
{
struct sockaddr_hci addr;
int fd;
static int err;
if (err < 0)
return err;
if (log_fd >= 0)
return log_fd;
fd = socket(PF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
if (fd < 0) {
err = -errno;
return -errno;
}
memset(&addr, 0, sizeof(addr));
addr.hci_family = AF_BLUETOOTH;
addr.hci_dev = HCI_DEV_NONE;
addr.hci_channel = HCI_CHANNEL_LOGGING;
err = bind(fd, (struct sockaddr *) &addr, sizeof(addr));
if (err < 0) {
err = -errno;
close(fd);
return err;
}
log_fd = fd;
return fd;
}
int bt_log_vprintf(uint16_t index, const char *label, int level,
const char *format, va_list ap)
{
struct iovec iov;
char *str;
int len;
len = vasprintf(&str, format, ap);
if (len < 0)
return errno;
len = strlen(str);
/* Replace new line since btmon already adds it */
if (len > 1 && str[len - 1] == '\n') {
str[len - 1] = '\0';
len--;
}
iov.iov_base = str;
iov.iov_len = len + 1;
len = bt_log_sendmsg(index, label, level, &iov, 1);
free(str);
return len;
}
int bt_log_printf(uint16_t index, const char *label, int level,
const char *format, ...)
{
va_list ap;
int err;
va_start(ap, format);
err = bt_log_vprintf(index, label, level, format, ap);
va_end(ap);
return err;
}
void bt_log_close(void)
{
if (log_fd < 0)
return;
close(log_fd);
log_fd = -1;
}