/* * * GattLib - GATT Library * * Copyright (C) 2016-2021 Olivier Martin * * * 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 * */ #include #include #include #ifdef GATTLIB_LOG_BACKEND_SYSLOG #include #endif #include "gattlib.h" typedef enum { READ, WRITE} operation_t; operation_t g_operation; static uuid_t g_uuid; long int value_data; static void usage(char *argv[]) { printf("%s []\n", argv[0]); } int main(int argc, char *argv[]) { int i, ret; size_t len; gatt_connection_t* connection; if ((argc != 4) && (argc != 5)) { usage(argv); return 1; } #ifdef GATTLIB_LOG_BACKEND_SYSLOG openlog("gattlib_read_write", LOG_CONS | LOG_NDELAY | LOG_PERROR, LOG_USER); setlogmask(LOG_UPTO(LOG_INFO)); #endif if (strcmp(argv[2], "read") == 0) { g_operation = READ; } else if ((strcmp(argv[2], "write") == 0) && (argc == 5)) { g_operation = WRITE; if ((strlen(argv[4]) >= 2) && (argv[4][0] == '0') && ((argv[4][1] == 'x') || (argv[4][1] == 'X'))) { value_data = strtol(argv[4], NULL, 16); } else { value_data = strtol(argv[4], NULL, 0); } printf("Value to write: 0x%lx\n", value_data); } else { usage(argv); return 1; } if (gattlib_string_to_uuid(argv[3], strlen(argv[3]) + 1, &g_uuid) < 0) { usage(argv); return 1; } connection = gattlib_connect(NULL, argv[1], GATTLIB_CONNECTION_OPTIONS_LEGACY_DEFAULT); if (connection == NULL) { GATTLIB_LOG(GATTLIB_ERROR, "Fail to connect to the bluetooth device."); return 1; } if (g_operation == READ) { uint8_t *buffer = NULL; ret = gattlib_read_char_by_uuid(connection, &g_uuid, (void **)&buffer, &len); if (ret != GATTLIB_SUCCESS) { char uuid_str[MAX_LEN_UUID_STR + 1]; gattlib_uuid_to_string(&g_uuid, uuid_str, sizeof(uuid_str)); if (ret == GATTLIB_NOT_FOUND) { GATTLIB_LOG(GATTLIB_ERROR, "Could not find GATT Characteristic with UUID %s. " "You might call the program with '--gatt-discovery'.", uuid_str); } else { GATTLIB_LOG(GATTLIB_ERROR, "Error while reading GATT Characteristic with UUID %s (ret:%d)", uuid_str, ret); } goto EXIT; } printf("Read UUID completed: "); for (i = 0; i < len; i++) { printf("%02x ", buffer[i]); } printf("\n"); gattlib_characteristic_free_value(buffer); } else { ret = gattlib_write_char_by_uuid(connection, &g_uuid, &value_data, sizeof(value_data)); if (ret != GATTLIB_SUCCESS) { char uuid_str[MAX_LEN_UUID_STR + 1]; gattlib_uuid_to_string(&g_uuid, uuid_str, sizeof(uuid_str)); if (ret == GATTLIB_NOT_FOUND) { GATTLIB_LOG(GATTLIB_ERROR, "Could not find GATT Characteristic with UUID %s. " "You might call the program with '--gatt-discovery'.", uuid_str); } else { GATTLIB_LOG(GATTLIB_ERROR, "Error while writing GATT Characteristic with UUID %s (ret:%d)", uuid_str, ret); } goto EXIT; } } EXIT: gattlib_disconnect(connection); return ret; }