static void update_bootstrap_info(lwm2m_bootstrap_state_t * previousBootstrapState,
lwm2m_context_t * context)
{
if (*previousBootstrapState != context->bsState)
{
*previousBootstrapState = context->bsState;
switch(context->bsState)
{
case BOOTSTRAP_CLIENT_HOLD_OFF:
#ifdef WITH_LOGS
fprintf(stdout, "[BOOTSTRAP] backup security and server objects\r\n");
#endif
prv_backup_objects(context);
break;
case BOOTSTRAP_FINISHED:
#ifdef WITH_LOGS
fprintf(stdout, "[BOOTSTRAP] free connections\r\n");
#endif
prv_connections_free(context);
break;
case BOOTSTRAP_FAILED:
#ifdef WITH_LOGS
fprintf(stdout, "[BOOTSTRAP] restore security and server objects\r\n");
#endif
prv_connections_free(context);
prv_restore_objects(context);
break;
default:
break;
}
}
#ifdef WITH_LOGS
prv_display_bootstrap_state(context->bsState);
#endif
}
int main(int argc, char *argv[])
{
client_data_t data;
int result;
lwm2m_context_t * lwm2mH = NULL;
int i;
const char * localPort = "56830";
const char * server = NULL;
const char * serverPort = LWM2M_STANDARD_PORT_STR;
char * name = "testlwm2mclient";
int lifetime = 300;
int batterylevelchanging = 0;
time_t reboot_time = 0;
int opt;
bool bootstrapRequested = false;
bool serverPortChanged = false;
#ifdef LWM2M_BOOTSTRAP
lwm2m_client_state_t previousState = STATE_INITIAL;
#endif
char * pskId = NULL;
char * psk = NULL;
uint16_t pskLen = -1;
char * pskBuffer = NULL;
/*
* The function start by setting up the command line interface (which may or not be useful depending on your project)
*
* This is an array of commands describes as { name, description, long description, callback, userdata }.
* The firsts tree are easy to understand, the callback is the function that will be called when this command is typed
* and in the last one will be stored the lwm2m context (allowing access to the server settings and the objects).
*/
command_desc_t commands[] =
{
{"list", "List known servers.", NULL, prv_output_servers, NULL},
{"change", "Change the value of resource.", " change URI [DATA]\r\n"
" URI: uri of the resource such as /3/0, /3/0/2\r\n"
" DATA: (optional) new value\r\n", prv_change, NULL},
{"update", "Trigger a registration update", " update SERVER\r\n"
" SERVER: short server id such as 123\r\n", prv_update, NULL},
#ifdef LWM2M_BOOTSTRAP
{"bootstrap", "Initiate a DI bootstrap process", NULL, prv_initiate_bootstrap, NULL},
{"dispb", "Display current backup of objects/instances/resources\r\n"
"\t(only security and server objects are backupped)", NULL, prv_display_backup, NULL},
#endif
{"ls", "List Objects and Instances", NULL, prv_object_list, NULL},
{"disp", "Display current objects/instances/resources", NULL, prv_display_objects, NULL},
{"dump", "Dump an Object", "dump URI"
"URI: uri of the Object or Instance such as /3/0, /1\r\n", prv_object_dump, NULL},
{"add", "Add support of object 1024", NULL, prv_add, NULL},
{"rm", "Remove support of object 1024", NULL, prv_remove, NULL},
{"quit", "Quit the client gracefully.", NULL, prv_quit, NULL},
{"^C", "Quit the client abruptly (without sending a de-register message).", NULL, NULL, NULL},
COMMAND_END_LIST
};
memset(&data, 0, sizeof(client_data_t));
data.addressFamily = AF_INET6;
opt = 1;
while (opt < argc)
{
if (argv[opt] == NULL
|| argv[opt][0] != '-'
|| argv[opt][2] != 0)
{
print_usage();
return 0;
}
switch (argv[opt][1])
{
case 'b':
bootstrapRequested = true;
if (!serverPortChanged) serverPort = LWM2M_BSSERVER_PORT_STR;
break;
case 'c':
batterylevelchanging = 1;
break;
case 't':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
if (1 != sscanf(argv[opt], "%d", &lifetime))
{
print_usage();
return 0;
}
break;
#ifdef WITH_TINYDTLS
case 'i':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
pskId = argv[opt];
break;
case 's':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
psk = argv[opt];
break;
#endif
case 'n':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
name = argv[opt];
break;
case 'l':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
localPort = argv[opt];
break;
case 'h':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
server = argv[opt];
break;
case 'p':
opt++;
if (opt >= argc)
{
print_usage();
return 0;
}
serverPort = argv[opt];
serverPortChanged = true;
break;
case '4':
data.addressFamily = AF_INET;
break;
default:
print_usage();
return 0;
}
opt += 1;
}
if (!server)
{
server = (AF_INET == data.addressFamily ? DEFAULT_SERVER_IPV4 : DEFAULT_SERVER_IPV6);
}
/*
*This call an internal function that create an IPV6 socket on the port 5683.
*/
fprintf(stderr, "Trying to bind LWM2M Client to port %s\r\n", localPort);
data.sock = create_socket(localPort, data.addressFamily);
if (data.sock < 0)
{
fprintf(stderr, "Failed to open socket: %d %s\r\n", errno, strerror(errno));
return -1;
}
/*
* Now the main function fill an array with each object, this list will be later passed to liblwm2m.
* Those functions are located in their respective object file.
*/
#ifdef WITH_TINYDTLS
if (psk != NULL)
{
pskLen = strlen(psk) / 2;
pskBuffer = malloc(pskLen);
if (NULL == pskBuffer)
{
fprintf(stderr, "Failed to create PSK binary buffer\r\n");
return -1;
}
// Hex string to binary
char *h = psk;
char *b = pskBuffer;
char xlate[] = "0123456789ABCDEF";
for ( ; *h; h += 2, ++b)
{
char *l = strchr(xlate, toupper(*h));
char *r = strchr(xlate, toupper(*(h+1)));
if (!r || !l)
{
fprintf(stderr, "Failed to parse Pre-Shared-Key HEXSTRING\r\n");
return -1;
}
*b = ((l - xlate) << 4) + (r - xlate);
}
}
#endif
char serverUri[50];
int serverId = 123;
sprintf (serverUri, "coap://%s:%s", server, serverPort);
#ifdef LWM2M_BOOTSTRAP
objArray[0] = get_security_object(serverId, serverUri, pskId, pskBuffer, pskLen, bootstrapRequested);
#else
objArray[0] = get_security_object(serverId, serverUri, pskId, pskBuffer, pskLen, false);
#endif
if (NULL == objArray[0])
{
fprintf(stderr, "Failed to create security object\r\n");
return -1;
}
data.securityObjP = objArray[0];
objArray[1] = get_server_object(serverId, "U", lifetime, false);
if (NULL == objArray[1])
{
fprintf(stderr, "Failed to create server object\r\n");
return -1;
}
objArray[2] = get_object_device();
if (NULL == objArray[2])
{
fprintf(stderr, "Failed to create Device object\r\n");
return -1;
}
objArray[3] = get_object_firmware();
if (NULL == objArray[3])
{
fprintf(stderr, "Failed to create Firmware object\r\n");
return -1;
}
objArray[4] = get_object_location();
if (NULL == objArray[4])
{
fprintf(stderr, "Failed to create location object\r\n");
return -1;
}
objArray[5] = get_test_object();
if (NULL == objArray[5])
{
fprintf(stderr, "Failed to create test object\r\n");
return -1;
}
objArray[6] = get_object_conn_m();
if (NULL == objArray[6])
{
fprintf(stderr, "Failed to create connectivity monitoring object\r\n");
return -1;
}
objArray[7] = get_object_conn_s();
if (NULL == objArray[7])
{
fprintf(stderr, "Failed to create connectivity statistics object\r\n");
return -1;
}
int instId = 0;
objArray[8] = acc_ctrl_create_object();
if (NULL == objArray[8])
{
fprintf(stderr, "Failed to create Access Control object\r\n");
return -1;
}
else if (acc_ctrl_obj_add_inst(objArray[8], instId, 3, 0, serverId)==false)
{
fprintf(stderr, "Failed to create Access Control object instance\r\n");
return -1;
}
else if (acc_ctrl_oi_add_ac_val(objArray[8], instId, 0, 0b000000000001111)==false)
{
fprintf(stderr, "Failed to create Access Control ACL default resource\r\n");
return -1;
}
else if (acc_ctrl_oi_add_ac_val(objArray[8], instId, 999, 0b000000000000001)==false)
{
fprintf(stderr, "Failed to create Access Control ACL resource for serverId: 999\r\n");
return -1;
}
/*
* The liblwm2m library is now initialized with the functions that will be in
* charge of communication
*/
lwm2mH = lwm2m_init(&data);
if (NULL == lwm2mH)
{
fprintf(stderr, "lwm2m_init() failed\r\n");
return -1;
}
#ifdef WITH_TINYDTLS
data.lwm2mH = lwm2mH;
#endif
/*
* We configure the liblwm2m library with the name of the client - which shall be unique for each client -
* the number of objects we will be passing through and the objects array
*/
result = lwm2m_configure(lwm2mH, name, NULL, NULL, OBJ_COUNT, objArray);
if (result != 0)
{
fprintf(stderr, "lwm2m_configure() failed: 0x%X\r\n", result);
return -1;
}
signal(SIGINT, handle_sigint);
/**
* Initialize value changed callback.
*/
init_value_change(lwm2mH);
/*
* As you now have your lwm2m context complete you can pass it as an argument to all the command line functions
* precedently viewed (first point)
*/
for (i = 0 ; commands[i].name != NULL ; i++)
{
commands[i].userData = (void *)lwm2mH;
}
fprintf(stdout, "LWM2M Client \"%s\" started on port %s\r\n", name, localPort);
fprintf(stdout, "> "); fflush(stdout);
/*
* We now enter in a while loop that will handle the communications from the server
*/
while (0 == g_quit)
{
struct timeval tv;
fd_set readfds;
if (g_reboot)
{
time_t tv_sec;
tv_sec = lwm2m_gettime();
if (0 == reboot_time)
{
reboot_time = tv_sec + 5;
}
if (reboot_time < tv_sec)
{
/*
* Message should normally be lost with reboot ...
*/
fprintf(stderr, "reboot time expired, rebooting ...");
system_reboot();
}
else
{
tv.tv_sec = reboot_time - tv_sec;
}
}
else if (batterylevelchanging)
{
update_battery_level(lwm2mH);
tv.tv_sec = 5;
}
else
{
tv.tv_sec = 60;
}
tv.tv_usec = 0;
FD_ZERO(&readfds);
FD_SET(data.sock, &readfds);
FD_SET(STDIN_FILENO, &readfds);
/*
* This function does two things:
* - first it does the work needed by liblwm2m (eg. (re)sending some packets).
* - Secondly it adjusts the timeout value (default 60s) depending on the state of the transaction
* (eg. retransmission) and the time between the next operation
*/
result = lwm2m_step(lwm2mH, &(tv.tv_sec));
if (result != 0)
{
fprintf(stderr, "lwm2m_step() failed: 0x%X\r\n", result);
if(previousState == STATE_BOOTSTRAPPING)
{
#ifdef WITH_LOGS
fprintf(stdout, "[BOOTSTRAP] restore security and server objects\r\n");
#endif
prv_connections_free(lwm2mH);
prv_restore_objects(lwm2mH);
lwm2mH->state = STATE_INITIAL;
}
else return -1;
}
#ifdef LWM2M_BOOTSTRAP
update_bootstrap_info(&previousState, lwm2mH);
#endif
/*
* This part will set up an interruption until an event happen on SDTIN or the socket until "tv" timed out (set
* with the precedent function)
*/
result = select(FD_SETSIZE, &readfds, NULL, NULL, &tv);
if (result < 0)
{
if (errno != EINTR)
{
fprintf(stderr, "Error in select(): %d %s\r\n", errno, strerror(errno));
}
}
else if (result > 0)
{
uint8_t buffer[MAX_PACKET_SIZE];
int numBytes;
/*
* If an event happens on the socket
*/
if (FD_ISSET(data.sock, &readfds))
{
struct sockaddr_storage addr;
socklen_t addrLen;
addrLen = sizeof(addr);
/*
* We retrieve the data received
*/
numBytes = recvfrom(data.sock, buffer, MAX_PACKET_SIZE, 0, (struct sockaddr *)&addr, &addrLen);
if (0 > numBytes)
{
fprintf(stderr, "Error in recvfrom(): %d %s\r\n", errno, strerror(errno));
}
else if (0 < numBytes)
{
char s[INET6_ADDRSTRLEN];
in_port_t port;
#ifdef WITH_TINYDTLS
dtls_connection_t * connP;
#else
connection_t * connP;
#endif
if (AF_INET == addr.ss_family)
{
struct sockaddr_in *saddr = (struct sockaddr_in *)&addr;
inet_ntop(saddr->sin_family, &saddr->sin_addr, s, INET6_ADDRSTRLEN);
port = saddr->sin_port;
}
else if (AF_INET6 == addr.ss_family)
{
struct sockaddr_in6 *saddr = (struct sockaddr_in6 *)&addr;
inet_ntop(saddr->sin6_family, &saddr->sin6_addr, s, INET6_ADDRSTRLEN);
port = saddr->sin6_port;
}
fprintf(stderr, "%d bytes received from [%s]:%hu\r\n", numBytes, s, ntohs(port));
/*
* Display it in the STDERR
*/
output_buffer(stderr, buffer, numBytes, 0);
connP = connection_find(data.connList, &addr, addrLen);
if (connP != NULL)
{
/*
* Let liblwm2m respond to the query depending on the context
*/
#ifdef WITH_TINYDTLS
int result = connection_handle_packet(connP, buffer, numBytes);
if (0 != result)
{
printf("error handling message %d\n",result);
}
#else
lwm2m_handle_packet(lwm2mH, buffer, numBytes, connP);
#endif
conn_s_updateRxStatistic(objArray[7], numBytes, false);
}
else
{
fprintf(stderr, "received bytes ignored!\r\n");
}
}
}
/*
* If the event happened on the SDTIN
*/
else if (FD_ISSET(STDIN_FILENO, &readfds))
{
numBytes = read(STDIN_FILENO, buffer, MAX_PACKET_SIZE - 1);
if (numBytes > 1)
{
buffer[numBytes] = 0;
/*
* We call the corresponding callback of the typed command passing it the buffer for further arguments
*/
handle_command(commands, (char*)buffer);
}
if (g_quit == 0)
{
fprintf(stdout, "\r\n> ");
fflush(stdout);
}
else
{
fprintf(stdout, "\r\n");
}
}
}
}
/*
* Finally when the loop is left smoothly - asked by user in the command line interface - we unregister our client from it
*/
if (g_quit == 1)
{
#ifdef LWM2M_BOOTSTRAP
close_backup_object();
#endif
lwm2m_close(lwm2mH);
}
close(data.sock);
connection_free(data.connList);
clean_security_object(objArray[0]);
lwm2m_free(objArray[0]);
clean_server_object(objArray[1]);
lwm2m_free(objArray[1]);
free_object_device(objArray[2]);
free_object_firmware(objArray[3]);
free_object_location(objArray[4]);
free_test_object(objArray[5]);
free_object_conn_m(objArray[6]);
free_object_conn_s(objArray[7]);
acl_ctrl_free_object(objArray[8]);
#ifdef MEMORY_TRACE
if (g_quit == 1)
{
trace_print(0, 1);
}
#endif
return 0;
}