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-rw-r--r--hci/src/btsnoop.c208
1 files changed, 114 insertions, 94 deletions
diff --git a/hci/src/btsnoop.c b/hci/src/btsnoop.c
index c16e26c11..703c522f6 100644
--- a/hci/src/btsnoop.c
+++ b/hci/src/btsnoop.c
@@ -1,6 +1,6 @@
/******************************************************************************
*
- * Copyright (C) 2009-2012 Broadcom Corporation
+ * Copyright (C) 2014 Google, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -18,24 +18,21 @@
#define LOG_TAG "btsnoop"
-#include <arpa/inet.h>
#include <assert.h>
-#include <ctype.h>
#include <cutils/log.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
-#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include "btsnoop.h"
#include "bt_types.h"
-#include "bt_utils.h"
#include "hci_layer.h"
+#include "stack_config.h"
typedef enum {
kCommandPacket = 1,
@@ -47,15 +44,121 @@ typedef enum {
// Epoch in microseconds since 01/01/0000.
static const uint64_t BTSNOOP_EPOCH_DELTA = 0x00dcddb30f2f8000ULL;
-// File descriptor for btsnoop file.
-static int hci_btsnoop_fd = -1;
-static bool is_logging = false;
-static const char *logging_path;
+static const stack_config_t *stack_config;
+static int logfile_fd = INVALID_FD;
+static bool module_started;
+static bool is_logging;
+static bool logging_enabled_via_api;
+
+// TODO(zachoverflow): merge btsnoop and btsnoop_net together
void btsnoop_net_open();
void btsnoop_net_close();
void btsnoop_net_write(const void *data, size_t length);
+static void btsnoop_write_packet(packet_type_t type, const uint8_t *packet, bool is_received);
+static void update_logging();
+
+// Module lifecycle functions
+
+static future_t *start_up(void) {
+ module_started = true;
+ update_logging();
+
+ return NULL;
+}
+
+static future_t *shut_down(void) {
+ module_started = false;
+ update_logging();
+
+ return NULL;
+}
+
+const module_t btsnoop_module = {
+ .name = BTSNOOP_MODULE,
+ .init = NULL,
+ .start_up = start_up,
+ .shut_down = shut_down,
+ .clean_up = NULL,
+ .dependencies = {
+ STACK_CONFIG_MODULE,
+ NULL
+ }
+};
+
+// Interface functions
+
+static void set_api_wants_to_log(bool value) {
+ logging_enabled_via_api = value;
+ update_logging();
+}
+
+static void capture(const BT_HDR *buffer, bool is_received) {
+ const uint8_t *p = buffer->data + buffer->offset;
+
+ if (logfile_fd == INVALID_FD)
+ return;
+
+ switch (buffer->event & MSG_EVT_MASK) {
+ case MSG_HC_TO_STACK_HCI_EVT:
+ btsnoop_write_packet(kEventPacket, p, false);
+ break;
+ case MSG_HC_TO_STACK_HCI_ACL:
+ case MSG_STACK_TO_HC_HCI_ACL:
+ btsnoop_write_packet(kAclPacket, p, is_received);
+ break;
+ case MSG_HC_TO_STACK_HCI_SCO:
+ case MSG_STACK_TO_HC_HCI_SCO:
+ btsnoop_write_packet(kScoPacket, p, is_received);
+ break;
+ case MSG_STACK_TO_HC_HCI_CMD:
+ btsnoop_write_packet(kCommandPacket, p, true);
+ break;
+ }
+}
+
+static const btsnoop_t interface = {
+ set_api_wants_to_log,
+ capture
+};
+
+const btsnoop_t *btsnoop_get_interface() {
+ stack_config = stack_config_get_interface();
+ return &interface;
+}
+
+// Internal functions
+
+static void update_logging() {
+ bool should_log = module_started &&
+ (logging_enabled_via_api || stack_config->get_btsnoop_turned_on());
+
+ if (should_log == is_logging)
+ return;
+
+ is_logging = should_log;
+ if (should_log) {
+ btsnoop_net_open();
+
+ const char *path = stack_config->get_btsnoop_log_path();
+ logfile_fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
+
+ if (logfile_fd == INVALID_FD) {
+ ALOGE("%s unable to open '%s': %s", __func__, path, strerror(errno));
+ return;
+ }
+
+ write(logfile_fd, "btsnoop\0\0\0\0\1\0\0\x3\xea", 16);
+ } else {
+ if (logfile_fd != INVALID_FD)
+ close(logfile_fd);
+
+ logfile_fd = INVALID_FD;
+ btsnoop_net_close();
+ }
+}
+
static uint64_t btsnoop_timestamp(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
@@ -68,8 +171,8 @@ static uint64_t btsnoop_timestamp(void) {
}
static void btsnoop_write(const void *data, size_t length) {
- if (hci_btsnoop_fd != -1)
- write(hci_btsnoop_fd, data, length);
+ if (logfile_fd != INVALID_FD)
+ write(logfile_fd, data, length);
btsnoop_net_write(data, length);
}
@@ -117,86 +220,3 @@ static void btsnoop_write_packet(packet_type_t type, const uint8_t *packet, bool
btsnoop_write(&type, 1);
btsnoop_write(packet, length_he - 1);
}
-
-static void btsnoop_open(const char *p_path) {
- assert(p_path != NULL);
- assert(*p_path != '\0');
-
- btsnoop_net_open();
-
- if (hci_btsnoop_fd != -1) {
- ALOGE("%s btsnoop log file is already open.", __func__);
- return;
- }
-
- hci_btsnoop_fd = open(p_path,
- O_WRONLY | O_CREAT | O_TRUNC,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
-
- if (hci_btsnoop_fd == -1) {
- ALOGE("%s unable to open '%s': %s", __func__, p_path, strerror(errno));
- return;
- }
-
- write(hci_btsnoop_fd, "btsnoop\0\0\0\0\1\0\0\x3\xea", 16);
-}
-
-static void btsnoop_close(void) {
- if (hci_btsnoop_fd != -1)
- close(hci_btsnoop_fd);
- hci_btsnoop_fd = -1;
-
- btsnoop_net_close();
-}
-
-static void btsnoop_set_logging_path(const char *path) {
- assert(!is_logging);
- logging_path = path;
-}
-
-static void btsnoop_set_is_running(bool should_log) {
- if (should_log == is_logging)
- return;
-
- is_logging = should_log;
- if (should_log) {
- assert(logging_path != NULL);
- btsnoop_open(logging_path);
- } else {
- btsnoop_close();
- }
-}
-
-static void btsnoop_capture(const BT_HDR *buffer, bool is_received) {
- const uint8_t *p = buffer->data + buffer->offset;
-
- if (hci_btsnoop_fd == -1)
- return;
-
- switch (buffer->event & MSG_EVT_MASK) {
- case MSG_HC_TO_STACK_HCI_EVT:
- btsnoop_write_packet(kEventPacket, p, false);
- break;
- case MSG_HC_TO_STACK_HCI_ACL:
- case MSG_STACK_TO_HC_HCI_ACL:
- btsnoop_write_packet(kAclPacket, p, is_received);
- break;
- case MSG_HC_TO_STACK_HCI_SCO:
- case MSG_STACK_TO_HC_HCI_SCO:
- btsnoop_write_packet(kScoPacket, p, is_received);
- break;
- case MSG_STACK_TO_HC_HCI_CMD:
- btsnoop_write_packet(kCommandPacket, p, true);
- break;
- }
-}
-
-static const btsnoop_t interface = {
- btsnoop_set_logging_path,
- btsnoop_set_is_running,
- btsnoop_capture
-};
-
-const btsnoop_t *btsnoop_get_interface() {
- return &interface;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-27 03:55:31 +0000