From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
This enables any code using shared to log information using the logging
channel which can then be decoded by the likes of btmon.
---
Makefile.am | 1 +
src/shared/log.c | 191 +++++++++++++++++++++++++++++++++++++++++++++++
src/shared/log.h | 31 ++++++++
3 files changed, 223 insertions(+)
create mode 100644 src/shared/log.c
create mode 100644 src/shared/log.h
diff --git a/Makefile.am b/Makefile.am
index 0ccf393c6..3f613a617 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,6 +119,7 @@ shared_sources = src/shared/io.h src/shared/timeout.h \
src/shared/gatt-server.h src/shared/gatt-server.c \
src/shared/gatt-db.h src/shared/gatt-db.c \
src/shared/gap.h src/shared/gap.c \
+ src/shared/log.h src/shared/log.c \
src/shared/tty.h
if READLINE
diff --git a/src/shared/log.c b/src/shared/log.c
new file mode 100644
index 000000000..d42bae713
--- /dev/null
+++ b/src/shared/log.c
@@ -0,0 +1,191 @@
+/*
+ *
+ * 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
+
+#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;
+}
diff --git a/src/shared/log.h b/src/shared/log.h
new file mode 100644
index 000000000..c72ab735b
--- /dev/null
+++ b/src/shared/log.h
@@ -0,0 +1,31 @@
+/*
+ *
+ * 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
+ *
+ */
+
+int bt_log_open(void);
+int bt_log_sendmsg(uint16_t index, const char *label, int level,
+ struct iovec *io, size_t io_len);
+int bt_log_vprintf(uint16_t index, const char *label, int level,
+ const char *format, va_list ap);
+int bt_log_printf(uint16_t index, const char *label, int level,
+ const char *format, ...);
+void bt_log_close(void);
--
2.17.2
