1 /****************************************************************************** 2 * 3 * Copyright (C) 2015 Google Inc. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #include <stdio.h> 20 #include <string.h> 21 #include <time.h> 22 23 #include "btcore/include/bdaddr.h" 24 #include "btif/include/btif_debug.h" 25 #include "btif/include/btif_debug_conn.h" 26 27 #define NUM_CONNECTION_EVENTS 16 28 #define TEMP_BUFFER_SIZE 30 29 30 typedef struct conn_event_t { 31 uint64_t ts; 32 btif_debug_conn_state_t state; 33 bt_bdaddr_t bda; 34 tGATT_DISCONN_REASON disconnect_reason; 35 } conn_event_t; 36 37 static conn_event_t connection_events[NUM_CONNECTION_EVENTS]; 38 static uint8_t current_event = 0; 39 40 static char *format_ts(const uint64_t ts, char *buffer, int len) { 41 const uint64_t ms = ts / 1000; 42 const time_t secs = ms / 1000; 43 struct tm *ptm = localtime(&secs); 44 45 strftime(buffer, len, "%m-%d %H:%M:%S.%%03u", ptm); 46 snprintf(buffer, len, buffer, (uint16_t)(ms % 1000)); 47 48 return buffer; 49 } 50 51 static char *format_state(const btif_debug_conn_state_t state) { 52 switch (state) { 53 case BTIF_DEBUG_CONNECTED: 54 return "CONNECTED "; 55 case BTIF_DEBUG_DISCONNECTED: 56 return "DISCONNECTED"; 57 } 58 return "UNKNOWN"; 59 } 60 61 static void next_event() { 62 ++current_event; 63 if (current_event == NUM_CONNECTION_EVENTS) 64 current_event = 0; 65 } 66 67 void btif_debug_conn_state(const bt_bdaddr_t bda, const btif_debug_conn_state_t state, 68 const tGATT_DISCONN_REASON disconnect_reason) { 69 next_event(); 70 71 conn_event_t *evt = &connection_events[current_event]; 72 evt->ts = btif_debug_ts(); 73 evt->state = state; 74 evt->disconnect_reason = disconnect_reason; 75 memcpy(&evt->bda, &bda, sizeof(bt_bdaddr_t)); 76 } 77 78 void btif_debug_conn_dump(int fd) { 79 const uint8_t current_event_local = current_event; // Cache to avoid threading issues 80 uint8_t dump_event = current_event_local; 81 char ts_buffer[TEMP_BUFFER_SIZE] = {0}; 82 char name_buffer[TEMP_BUFFER_SIZE] = {0}; 83 84 dprintf(fd, "\nConnection Events:\n"); 85 if (connection_events[dump_event].ts == 0) 86 dprintf(fd, " None\n"); 87 88 while (connection_events[dump_event].ts) { 89 conn_event_t *evt = &connection_events[dump_event]; 90 dprintf(fd, " %s %s %s", 91 format_ts(evt->ts, ts_buffer, sizeof(ts_buffer)), 92 format_state(evt->state), 93 bdaddr_to_string(&evt->bda, name_buffer, sizeof(name_buffer)) 94 ); 95 if (evt->state == BTIF_DEBUG_DISCONNECTED) 96 dprintf(fd, " reason=%d", evt->disconnect_reason); 97 dprintf(fd,"\n"); 98 99 // Go to previous event; wrap if needed 100 if (dump_event > 0) 101 --dump_event; 102 else 103 dump_event = NUM_CONNECTION_EVENTS - 1; 104 105 // Check if we dumped all events 106 if (dump_event == current_event_local) 107 break; 108 } 109 } 110
