wiced_result_t process_received_udp_packet()
{
wiced_packet_t* packet;
char* rx_data;
static uint16_t rx_data_length;
uint16_t available_data_length;
static wiced_ip_address_t udp_src_ip_addr;
static uint16_t udp_src_port;
wiced_result_t result = wiced_udp_receive( &udp_socket, &packet, RX_WAIT_TIMEOUT );
if ( ( result == WICED_ERROR ) || ( result == WICED_TIMEOUT ) ) {
return result;
}
wiced_udp_packet_get_info( packet, &udp_src_ip_addr, &udp_src_port );
wiced_packet_get_data( packet, 0, (uint8_t**) &rx_data, &rx_data_length, &available_data_length );
uint32_t data_len = MIN(rx_data_length, BUFFER_SIZE-(48));
write_ws2812(0, data_len, rx_data);
// WPRINT_APP_INFO ( ("UDP Rx: \"%.2x\" from IP %u.%u.%u.%u:%d\n", *rx_data,
// (unsigned char) ( ( GET_IPV4_ADDRESS(udp_src_ip_addr) >> 24 ) & 0xff ),
// (unsigned char) ( ( GET_IPV4_ADDRESS(udp_src_ip_addr) >> 16 ) & 0xff ),
// (unsigned char) ( ( GET_IPV4_ADDRESS(udp_src_ip_addr) >> 8 ) & 0xff ),
// (unsigned char) ( ( GET_IPV4_ADDRESS(udp_src_ip_addr) >> 0 ) & 0xff ),
// udp_src_port ) );
wiced_packet_delete( packet );
return WICED_SUCCESS;
}
sock_result_t socket_receivefrom(sock_handle_t sd, void* buffer, socklen_t bufLen, uint32_t flags, sockaddr_t* addr, socklen_t* addrsize)
{
socket_t* socket = from_handle(sd);
volatile wiced_result_t result = WICED_INVALID_SOCKET;
uint16_t read_len = 0;
if (is_open(socket) && is_udp(socket)) {
std::lock_guard<socket_t> lk(*socket);
wiced_packet_t* packet = NULL;
// UDP receive timeout changed to 0 sec so as not to block
if ((result=wiced_udp_receive(udp(socket), &packet, WICED_NO_WAIT))==WICED_SUCCESS) {
wiced_ip_address_t wiced_ip_addr;
uint16_t port;
if ((result=wiced_udp_packet_get_info(packet, &wiced_ip_addr, &port))==WICED_SUCCESS) {
uint32_t ipv4 = GET_IPV4_ADDRESS(wiced_ip_addr);
addr->sa_data[0] = (port>>8) & 0xFF;
addr->sa_data[1] = port & 0xFF;
addr->sa_data[2] = (ipv4 >> 24) & 0xFF;
addr->sa_data[3] = (ipv4 >> 16) & 0xFF;
addr->sa_data[4] = (ipv4 >> 8) & 0xFF;
addr->sa_data[5] = ipv4 & 0xFF;
result=read_packet(packet, (uint8_t*)buffer, bufLen, &read_len);
}
/*
* Function: wilddog_receive
* Description: wilddog receive function, it use the interface in wiced platform.
* Input: socketId: The socket id.
* addr: The pointer of Wilddog_Address_T
* buf: The pointer of the send buffer
* bufLen: The length of the send buffer.
* timeout: The max timeout in recv process.
* Output: N/A
* Return: If success, return the number of bytes received; else return -1.
*/
int wilddog_receive
(
int socketId,
Wilddog_Address_T* addr_in,
void* buf,
s32 bufLen,
s32 timeout
)
{
wiced_udp_socket_t* socket = (wiced_udp_socket_t*) socketId;
wiced_packet_t* receive = NULL;
u16 totalLeft = 0;
u16 total = 0;
uint16_t pos = 0;
uint8_t* rxData;
uint16_t fragLeft = 0;
wiced_ip_address_t recieve_ip_addr;
uint16_t receive_port;
wiced_result_t result;
result = wiced_udp_receive( socket, &receive, timeout );
if ( result == WICED_SUCCESS )
{
if(NULL == receive)
{
wilddog_debug_level(WD_DEBUG_ERROR, "receive is NULL!");
return -1;
}
wiced_udp_packet_get_info( receive, &recieve_ip_addr, &receive_port );
if ( !recieve_ip_addr.ip.v4 == MAKE_IPV4_ADDRESS(addr_in->ip[0], \
addr_in->ip[1], addr_in->ip[2], addr_in->ip[3]) )
{
wilddog_debug_level(WD_DEBUG_ERROR, "addr error!\n" );
wiced_packet_delete( receive );
return -1;
}
do
{
if ( wiced_packet_get_data( receive, 0, (uint8_t**) &rxData, \
&fragLeft, &totalLeft ) != WICED_SUCCESS )
{
wilddog_debug_level(WD_DEBUG_ERROR, \
"get data from packet error \r\n" );
wiced_packet_delete( receive );
return -1;
}
else
{
if ( pos + fragLeft > bufLen )
{
/* too large, drop*/
wiced_packet_delete( receive );
wilddog_debug_level(WD_DEBUG_ERROR, \
"too large receive end , get %d bytes\n", pos );
return 0;
}
if ( total == 0 )
{
/*only get first data, next fragment's total is wrong*/
total = totalLeft;
}
memcpy( (uint8_t *) ( buf + pos ), rxData, fragLeft );
pos += fragLeft;
fragLeft = 0;
}
if ( pos == total )
{
/*end*/
#if WILDDOG_SELFTEST
{
performtest_getWaitSessionQueryTime();
performtest_getWaitRecvTime();
}
#endif
wilddog_debug_level(WD_DEBUG_LOG, "received %d data!", pos);
wiced_packet_delete( receive );
return pos;
}
else if ( pos < total )
{
/*get next fragment*/
wilddog_debug_level(WD_DEBUG_LOG, "more than one packet!");
if ( WICED_SUCCESS != _packet_get_next_fragment( receive, \
&receive ) )
{
wilddog_debug_level(WD_DEBUG_ERROR, \
"get next fragment err! %d lost!", total);
if(receive)
wiced_packet_delete( receive );
return -1;
}
if ( NULL == receive )
{
wilddog_debug_level(WD_DEBUG_ERROR, \
"get next fragment err! %d lost!", total);
return -1;
}
}
else
{
wiced_packet_delete( receive );
return -1;
}
} while ( pos < total );
}
else
{
wilddog_debug_level(WD_DEBUG_LOG, "result = %d",result);
}
/*if(receive)
wiced_packet_delete( receive );*/
return 0;
}
/**
* Implements a very simple DHCP server.
*
* Server will always offer next available address to a DISCOVER command
* Server will NAK any REQUEST command which is not requesting the next available address
* Server will ACK any REQUEST command which is for the next available address, and then increment the next available address
*
* @param my_addr : local IP address for binding of server port.
*/
static void dhcp_thread( uint32_t thread_input )
{
wiced_packet_t* received_packet;
wiced_packet_t* transmit_packet;
wiced_ip_address_t local_ip_address;
wiced_ip_address_t netmask;
uint32_t next_available_ip_addr;
uint32_t ip_mask;
uint32_t subnet;
uint32_t netmask_htobe;
char* option_ptr;
wiced_dhcp_server_t* server = (wiced_dhcp_server_t*)thread_input;
uint8_t subnet_mask_option_buff[] = { 1, 4, 0, 0, 0, 0 };
uint8_t server_ip_addr_option_buff[] = { 54, 4, 0, 0, 0, 0 };
uint32_t* server_ip_addr_ptr = (uint32_t*)&server_ip_addr_option_buff[2];
uint8_t wpad_option_buff[ 2 + sizeof(WPAD_SAMPLE_URL)-1 ] = { 252, sizeof(WPAD_SAMPLE_URL)-1 };
/* Save local IP address to be sent in DHCP packets */
wiced_ip_get_ipv4_address(server->interface, &local_ip_address);
*server_ip_addr_ptr = htobe32( GET_IPV4_ADDRESS( local_ip_address ) );
/* Save the current netmask to be sent in DHCP packets as the 'subnet mask option' */
wiced_ip_get_netmask(server->interface, &netmask);
netmask_htobe = htobe32( GET_IPV4_ADDRESS(netmask) );
memcpy(&subnet_mask_option_buff[2], &netmask_htobe, 4);
/* Calculate the first available IP address which will be served - based on the netmask and the local IP */
ip_mask = ~( GET_IPV4_ADDRESS( netmask ) );
subnet = GET_IPV4_ADDRESS( local_ip_address ) & GET_IPV4_ADDRESS( netmask );
next_available_ip_addr = subnet | ( ( GET_IPV4_ADDRESS( local_ip_address ) + 1 ) & ip_mask );
/* Prepare the Web proxy auto discovery URL */
memcpy(&wpad_option_buff[2], WPAD_SAMPLE_URL, sizeof(WPAD_SAMPLE_URL)-1);
ipv4_to_string( (char*)&wpad_option_buff[2 + 7], *server_ip_addr_ptr);
/* Initialise the server quit flag */
server->quit = WICED_FALSE;
/* Loop endlessly */
while ( server->quit == WICED_FALSE )
{
uint16_t data_length;
uint16_t available_data_length;
dhcp_header_t* request_header;
/* Sleep until data is received from socket. */
if ( wiced_udp_receive( &server->socket, &received_packet, WICED_WAIT_FOREVER ) != WICED_SUCCESS )
{
continue;
}
/* Get a pointer to the data in the packet */
wiced_packet_get_data( received_packet, 0, (uint8_t**) &request_header, &data_length, &available_data_length );
/* Check DHCP command */
switch ( request_header->options[2] )
{
case DHCPDISCOVER:
{
dhcp_header_t* reply_header;
uint16_t available_space;
wiced_mac_t client_mac_address;
wiced_ip_address_t client_ip_address;
uint32_t temp;
/* Create reply packet */
if ( wiced_packet_create_udp( &server->socket, sizeof(dhcp_header_t), &transmit_packet, (uint8_t**) &reply_header, &available_space ) != WICED_SUCCESS )
{
/* Cannot reply - release incoming packet */
wiced_packet_delete( received_packet );
break;
}
/* Copy in the DHCP header content from the received discover packet into the reply packet */
memcpy( reply_header, request_header, sizeof(dhcp_header_t) - sizeof(reply_header->options) );
/* Finished with the received discover packet - release it */
wiced_packet_delete( received_packet );
/* Now construct the OFFER response */
reply_header->opcode = BOOTP_OP_REPLY;
/* Clear the DHCP options list */
memset( &reply_header->options, 0, sizeof( reply_header->options ) );
/* Record client MAC address */
memcpy( &client_mac_address, request_header->client_hardware_addr, sizeof( client_mac_address ) );
/* Check whether device is already cached */
if ( get_client_ip_address_from_cache( &client_mac_address, &client_ip_address ) != WICED_SUCCESS )
{
/* Address not found in cache. Use next available IP address */
client_ip_address.version = WICED_IPV4;
client_ip_address.ip.v4 = next_available_ip_addr;
}
/* Create the IP address for the Offer */
temp = htonl(client_ip_address.ip.v4);
memcpy( reply_header->your_ip_addr, &temp, sizeof( temp ) );
/* Copy the magic DHCP number */
memcpy( reply_header->magic, dhcp_magic_cookie, 4 );
/* Add options */
option_ptr = (char *) &reply_header->options;
option_ptr = MEMCAT( option_ptr, dhcp_offer_option_buff, 3 ); /* DHCP message type */
option_ptr = MEMCAT( option_ptr, server_ip_addr_option_buff, 6 ); /* Server identifier */
option_ptr = MEMCAT( option_ptr, lease_time_option_buff, 6 ); /* Lease Time */
option_ptr = MEMCAT( option_ptr, subnet_mask_option_buff, 6 ); /* Subnet Mask */
option_ptr = (char*)MEMCAT( option_ptr, wpad_option_buff, sizeof(wpad_option_buff) ); /* Web proxy auto discovery URL */
/* Copy the local IP into the Router & DNS server Options */
memcpy( option_ptr, server_ip_addr_option_buff, 6 ); /* Router (gateway) */
option_ptr[0] = 3; /* Router id */
option_ptr += 6;
memcpy( option_ptr, server_ip_addr_option_buff, 6 ); /* DNS server */
option_ptr[0] = 6; /* DNS server id */
option_ptr += 6;
option_ptr = MEMCAT( option_ptr, mtu_option_buff, 4 ); /* Interface MTU */
option_ptr[0] = (char) 0xff; /* end options */
option_ptr++;
/* Send OFFER reply packet */
wiced_packet_set_data_end( transmit_packet, (uint8_t*) option_ptr );
if ( wiced_udp_send( &server->socket, WICED_IP_BROADCAST, IPPORT_DHCPC, transmit_packet ) != WICED_SUCCESS )
{
wiced_packet_delete( transmit_packet );
}
}
break;
case DHCPREQUEST:
{
/* REQUEST command - send back ACK or NAK */
uint32_t temp;
uint32_t* server_id_req;
dhcp_header_t* reply_header;
uint16_t available_space;
wiced_mac_t client_mac_address;
wiced_ip_address_t given_ip_address;
wiced_ip_address_t requested_ip_address;
wiced_bool_t next_avail_ip_address_used = WICED_FALSE;
/* Check that the REQUEST is for this server */
server_id_req = (uint32_t*) find_option( request_header, 54 );
if ( ( server_id_req != NULL ) && ( GET_IPV4_ADDRESS( local_ip_address ) != htobe32(*server_id_req) ) )
{
break; /* Server ID does not match local IP address */
}
/* Create reply packet */
if ( wiced_packet_create_udp( &server->socket, sizeof(dhcp_header_t), &transmit_packet, (uint8_t**) &reply_header, &available_space ) != WICED_SUCCESS )
{
/* Cannot reply - release incoming packet */
wiced_packet_delete( received_packet );
break;
}
/* Copy in the DHCP header content from the received request packet into the reply packet */
memcpy( reply_header, request_header, sizeof(dhcp_header_t) - sizeof(reply_header->options) );
/* Record client MAC address */
memcpy( &client_mac_address, request_header->client_hardware_addr, sizeof( client_mac_address ) );
/* Locate the requested address in the options and keep requested address */
requested_ip_address.version = WICED_IPV4;
requested_ip_address.ip.v4 = ntohl(*(uint32_t*)find_option( request_header, 50 ));
/* Delete received packet. We don't need it anymore */
wiced_packet_delete( received_packet );
reply_header->opcode = BOOTP_OP_REPLY;
/* Blank options list */
memset( &reply_header->options, 0, sizeof( reply_header->options ) );
/* Copy DHCP magic number into packet */
memcpy( reply_header->magic, dhcp_magic_cookie, 4 );
option_ptr = (char *) &reply_header->options;
/* Check if device is cache. If it is, give the previous IP address. Otherwise give the next available IP address */
if ( get_client_ip_address_from_cache( &client_mac_address, &given_ip_address ) != WICED_SUCCESS )
{
/* Address not found in cache. Use next available IP address */
next_avail_ip_address_used = WICED_TRUE;
given_ip_address.version = WICED_IPV4;
given_ip_address.ip.v4 = next_available_ip_addr;
}
/* Check if the requested IP address matches one we have assigned */
if ( memcmp( &requested_ip_address.ip.v4, &given_ip_address.ip.v4, sizeof( requested_ip_address.ip.v4 ) ) != 0 )
{
/* Request is not for the assigned IP - force client to take next available IP by sending NAK */
/* Add appropriate options */
option_ptr = (char*)MEMCAT( option_ptr, dhcp_nak_option_buff, 3 ); /* DHCP message type */
option_ptr = (char*)MEMCAT( option_ptr, server_ip_addr_option_buff, 6 ); /* Server identifier */
memset( reply_header->your_ip_addr, 0, sizeof( reply_header->your_ip_addr ) ); /* Clear IP addr */
}
else
{
/* Request is for next available IP */
/* Add appropriate options */
option_ptr = (char*)MEMCAT( option_ptr, dhcp_ack_option_buff, 3 ); /* DHCP message type */
option_ptr = (char*)MEMCAT( option_ptr, server_ip_addr_option_buff, 6 ); /* Server identifier */
option_ptr = (char*)MEMCAT( option_ptr, lease_time_option_buff, 6 ); /* Lease Time */
option_ptr = (char*)MEMCAT( option_ptr, subnet_mask_option_buff, 6 ); /* Subnet Mask */
option_ptr = (char*)MEMCAT( option_ptr, wpad_option_buff, sizeof(wpad_option_buff) ); /* Web proxy auto discovery URL */
/* Copy the local IP into the Router & DNS server Options */
memcpy( option_ptr, server_ip_addr_option_buff, 6 ); /* Router (gateway) */
option_ptr[0] = 3; /* Router id */
option_ptr += 6;
memcpy( option_ptr, server_ip_addr_option_buff, 6 ); /* DNS server */
option_ptr[0] = 6; /* DNS server id */
option_ptr += 6;
option_ptr = (char*)MEMCAT( option_ptr, mtu_option_buff, 4 ); /* Interface MTU */
/* Create the IP address for the Offer */
temp = htonl(given_ip_address.ip.v4);
memcpy( reply_header->your_ip_addr, &temp, sizeof( temp ) );
/* Increment next available IP address only if not found in cache */
if ( next_avail_ip_address_used == WICED_TRUE )
{
do
{
next_available_ip_addr = subnet | ( ( next_available_ip_addr + 1 ) & ip_mask );
} while ( next_available_ip_addr == GET_IPV4_ADDRESS(local_ip_address) );
}
/* Cache client */
add_client_to_cache( &client_mac_address, &given_ip_address );
}
option_ptr[0] = (char) 0xff; /* end options */
option_ptr++;
/* Send reply packet */
wiced_packet_set_data_end( transmit_packet, (uint8_t*) option_ptr );
if ( wiced_udp_send( &server->socket, WICED_IP_BROADCAST, IPPORT_DHCPC, transmit_packet ) != WICED_SUCCESS )
{
wiced_packet_delete( transmit_packet );
}
}
break;
default:
/* Unknown packet type - release received packet */
wiced_packet_delete( received_packet );
break;
}
}
/* Server loop has exited due to quit flag */
/* Delete DHCP socket */
wiced_udp_delete_socket( &server->socket );
WICED_END_OF_CURRENT_THREAD( );
}
