wiced_result_t wiced_tls_receive_packet( wiced_tcp_socket_t* socket, wiced_packet_t** packet, uint32_t timeout )
{
wiced_result_t result;
wiced_tls_context_t* context = &socket->tls_context->context;
/* Check if we already have a record which should only happen if it was larger than a packet which means it's stored in the defragmentation buffer */
if ( context->current_record != NULL )
{
wiced_assert( "Something wrong", (void*)context->current_record == context->defragmentation_buffer );
return tls_packetize_buffered_data( context, packet );
}
else
{
tls_record_t* record;
result = tls_get_next_record( context, &record, timeout, TLS_RECEIVE_PACKET_IF_NEEDED );
if ( result != WICED_SUCCESS )
{
return result;
}
/* Check if this record has been defragmented */
if ( (void*)record == context->defragmentation_buffer )
{
return tls_packetize_buffered_data( context, packet );
}
else
{
tls_record_t* temp_record;
uint8_t* packet_data;
uint16_t length;
uint16_t available;
uint8_t* end_of_data;
/* We have a pointer to the current record so we can move on */
tls_skip_current_record(context);
/* Make sure we process every record in this packet */
end_of_data = record->message + htobe16( record->length );
while ( tls_get_next_record( context, &temp_record, timeout, TLS_AVOID_NEW_RECORD_PACKET_RECEIVE ) == TLS_SUCCESS )
{
/* Make the record data contiguous with the previous record */
uint16_t temp_record_length = htobe16( temp_record->length );
end_of_data = MEMCAT( end_of_data, temp_record->message, temp_record_length );
record->length = htobe16( htobe16(record->length) + temp_record_length );
tls_skip_current_record( context );
}
/* Set the packet start and end */
wiced_packet_get_data( (wiced_packet_t*)context->received_packet, 0, &packet_data, &length, &available );
tls_host_set_packet_start( context->received_packet, record->message );
wiced_packet_set_data_end( (wiced_packet_t*)context->received_packet, end_of_data );
*packet = (wiced_packet_t*)context->received_packet;
context->received_packet = NULL;
context->received_packet_length = 0;
}
}
return WICED_SUCCESS;
}
wiced_result_t wiced_tcp_stream_read_with_count( wiced_tcp_stream_t* tcp_stream, void* buffer, uint16_t buffer_length, uint32_t timeout, uint32_t* read_count )
{
WICED_LINK_CHECK_TCP_SOCKET( tcp_stream->socket );
if ( read_count != NULL )
{
*read_count = 0;
}
while ( buffer_length != 0 )
{
uint16_t amount_to_read;
uint16_t total_available;
uint8_t* packet_data = NULL;
uint16_t space_available = 0;
/* Check if we don't have a packet */
if (tcp_stream->rx_packet == NULL)
{
wiced_result_t result;
result = wiced_tcp_receive(tcp_stream->socket, &tcp_stream->rx_packet, timeout );
if ( result != WICED_TCPIP_SUCCESS)
{
if ( ( read_count != NULL ) && ( *read_count != 0 ) )
{
result = WICED_TCPIP_SUCCESS;
}
return result;
}
}
wiced_packet_get_data(tcp_stream->rx_packet, 0, &packet_data, &space_available, &total_available);
/* Read data */
amount_to_read = MIN(buffer_length, space_available);
buffer = MEMCAT((uint8_t*)buffer, packet_data, amount_to_read);
if ( read_count != NULL )
{
*read_count += amount_to_read;
}
/* Update buffer length */
buffer_length = (uint16_t)(buffer_length - amount_to_read);
/* Check if we need a new packet */
if ( amount_to_read == space_available )
{
wiced_packet_delete( tcp_stream->rx_packet );
tcp_stream->rx_packet = NULL;
}
else
{
/* Otherwise update the start of the data for the next read request */
wiced_packet_set_data_start(tcp_stream->rx_packet, packet_data + amount_to_read);
}
}
return WICED_TCPIP_SUCCESS;
}
/*
* Flush any data not yet written
*/
tls_result_t ssl_flush_output( ssl_context *ssl, uint8_t* buffer, uint32_t length )
{
if ( ssl->transport_protocol == TLS_TCP_TRANSPORT )
{
if (ssl->outgoing_packet != NULL)
{
wiced_packet_set_data_end((wiced_packet_t*)ssl->outgoing_packet, buffer + length);
tls_host_send_tcp_packet(ssl->send_context, ssl->outgoing_packet);
ssl->outgoing_packet = NULL;
ssl->out_buffer_size = 0;
}
else
{
uint16_t actual_packet_size;
tls_packet_t* temp_packet;
uint8_t* packet_buffer;
uint8_t* data = buffer;
while (length != 0)
{
uint16_t amount_to_copy;
if ( wiced_packet_create_tcp( ssl->send_context, (uint16_t)length, (wiced_packet_t**) &temp_packet, &packet_buffer, &actual_packet_size ) != WICED_SUCCESS )
{
tls_host_free(buffer);
return 1;
}
if ( ssl->state == SSL_HANDSHAKE_OVER )
{
/* this doesn't need the extra space for the encryption header that a normal TLS socket would use - remove it */
packet_buffer -= sizeof(tls_record_header_t);
wiced_packet_set_data_start((wiced_packet_t*) temp_packet, packet_buffer);
}
amount_to_copy = (uint16_t) MIN(length, actual_packet_size);
packet_buffer = MEMCAT(packet_buffer, data, amount_to_copy);
data += amount_to_copy;
length -= amount_to_copy;
wiced_packet_set_data_end((wiced_packet_t*)temp_packet, packet_buffer );
tls_host_send_tcp_packet(ssl->send_context, temp_packet);
}
tls_host_free(buffer);
}
}
#ifndef DISABLE_EAP_TLS
else if ( ssl->transport_protocol == TLS_EAP_TRANSPORT )
{
supplicant_host_send_eap_tls_fragments( (supplicant_workspace_t*) ssl->send_context, buffer, length );
ssl->out_buffer_size = 0;
tls_host_free( buffer );
buffer = NULL;
}
#endif /* DISABLE_EAP_TLS */
return TLS_SUCCESS;
}
wiced_result_t wiced_tcp_stream_write( wiced_tcp_stream_t* tcp_stream, const void* data, uint32_t data_length )
{
wiced_assert("Bad args", tcp_stream != NULL);
WICED_LINK_CHECK_TCP_SOCKET( tcp_stream->socket );
while ( data_length != 0 )
{
uint16_t amount_to_write;
/* Check if we don't have a packet */
if ( tcp_stream->tx_packet == NULL )
{
wiced_result_t result;
result = wiced_packet_create_tcp( tcp_stream->socket, (uint16_t) MIN( data_length, 0xffff ), &tcp_stream->tx_packet, &tcp_stream->tx_packet_data , &tcp_stream->tx_packet_space_available );
if ( result != WICED_TCPIP_SUCCESS )
{
return result;
}
}
/* Write data */
amount_to_write = (uint16_t) MIN( data_length, tcp_stream->tx_packet_space_available );
tcp_stream->tx_packet_data = MEMCAT( tcp_stream->tx_packet_data, data, amount_to_write );
/* Update variables */
data_length = (uint16_t)(data_length - amount_to_write);
tcp_stream->tx_packet_space_available = (uint16_t) ( tcp_stream->tx_packet_space_available - amount_to_write );
data = (void*)((uint32_t)data + amount_to_write);
/* Check if the packet is full */
if ( tcp_stream->tx_packet_space_available == 0 )
{
wiced_result_t result;
/* Send the packet */
wiced_packet_set_data_end( tcp_stream->tx_packet, (uint8_t*)tcp_stream->tx_packet_data );
result = wiced_tcp_send_packet( tcp_stream->socket, tcp_stream->tx_packet );
tcp_stream->tx_packet_data = NULL;
tcp_stream->tx_packet_space_available = 0;
if ( result != WICED_TCPIP_SUCCESS )
{
wiced_packet_delete( tcp_stream->tx_packet );
tcp_stream->tx_packet = NULL;
return result;
}
tcp_stream->tx_packet = NULL;
}
}
return WICED_TCPIP_SUCCESS;
}
wiced_result_t wiced_tcp_send_buffer( wiced_tcp_socket_t* socket, const void* buffer, uint16_t buffer_length )
{
wiced_packet_t* packet = NULL;
uint8_t* data_ptr = (uint8_t*)buffer;
uint8_t* packet_data_ptr;
uint16_t available_space;
wiced_assert("Bad args", socket != NULL);
WICED_LINK_CHECK_TCP_SOCKET( socket );
/* Create a packet, copy the data and send it off */
while ( buffer_length != 0 )
{
uint16_t data_to_write;
wiced_result_t result = wiced_packet_create_tcp( socket, buffer_length, &packet, &packet_data_ptr, &available_space );
if ( result != WICED_TCPIP_SUCCESS )
{
return result;
}
/* Write data */
data_to_write = MIN(buffer_length, available_space);
packet_data_ptr = MEMCAT(packet_data_ptr, data_ptr, data_to_write);
wiced_packet_set_data_end( packet, packet_data_ptr );
/* Update variables */
data_ptr += data_to_write;
buffer_length = (uint16_t) ( buffer_length - data_to_write );
available_space = (uint16_t) ( available_space - data_to_write );
result = wiced_tcp_send_packet( socket, packet );
if ( result != WICED_TCPIP_SUCCESS )
{
wiced_packet_delete( packet );
return result;
}
}
return WICED_TCPIP_SUCCESS;
}
/*
* Flush any data not yet written
*/
tls_result_t ssl_flush_output( ssl_context *ssl, uint8_t* buffer, uint32_t length )
{
if (ssl->outgoing_packet != NULL)
{
wiced_packet_set_data_end((wiced_packet_t*)ssl->outgoing_packet, buffer + length);
tls_host_send_packet(ssl->send_context, ssl->outgoing_packet);
ssl->outgoing_packet = NULL;
ssl->out_buffer_size = 0;
}
else
{
uint16_t actual_packet_size;
tls_packet_t* temp_packet;
uint8_t* packet_buffer;
uint8_t* data = buffer;
while (length != 0)
{
uint16_t amount_to_copy;
if ( wiced_packet_create_tcp( ssl->send_context, (uint16_t)length, (wiced_packet_t**) &temp_packet, &packet_buffer, &actual_packet_size ) != WICED_SUCCESS )
{
free(buffer);
return 1;
}
amount_to_copy = (uint16_t) MIN(length, actual_packet_size);
packet_buffer = MEMCAT(packet_buffer, data, amount_to_copy);
data += amount_to_copy;
length -= amount_to_copy;
wiced_packet_set_data_end((wiced_packet_t*)temp_packet, packet_buffer );
tls_host_send_packet(ssl->send_context, temp_packet);
}
free(buffer);
}
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( );
}
