OFDPE
handle_received_frame( const switch_port *port, buffer *frame ) {
assert( port != NULL );
assert( frame != NULL );
debug( "Handling received frame ( port_no = %u, frame = %p, user_data = %p ).", port->port_no, frame, frame->user_data );
if ( frame->user_data == NULL ) {
bool ret = parse_packet( frame );
if ( !ret ) {
warn( "Failed to parse a received frame ( port_no = %u, frame = %p ).", port->port_no, frame );
return OFDPE_FAILED;
}
}
assert( frame->user_data != NULL );
( ( packet_info * ) frame->user_data )->eth_in_port = port->port_no;
( ( packet_info * ) frame->user_data )->eth_in_phy_port = port->port_no;
if ( !trylock_pipeline() ) {
return ERROR_LOCK;
}
process_received_frame( port, frame );
if ( !unlock_pipeline() ) {
return ERROR_UNLOCK;
}
return OFDPE_SUCCESS;
}
int main ( void )
{
int_init(); // This is specific for OpenRISC, you may need to call some other routine here
// in order to initialise interrupt support and so on.
// We use a serial port console to display informational messages.
init_uart( UART1_BASE_ADDR );
uart_print( UART1_BASE_ADDR, "This is the Ethernet example program." EOL );
init_ethernet();
int_add( ETH_IRQ, ð_interrupt, NULL );
// Use an Ethernet sniffer like Wireshark in order to see the test frame sent.
uart_print( UART1_BASE_ADDR, "Sending the first test frame (which has invalid protocol contents)..." EOL );
int pos = 0;
write_broadcast_mac_addr( ð_tx_packet[ pos ] );
pos += MAC_ADDR_LEN;
write_own_mac_addr( ð_tx_packet[ pos ] );
pos += MAC_ADDR_LEN;
eth_tx_packet[ pos + 0 ] = 0x10;
eth_tx_packet[ pos + 1 ] = 0x20;
eth_tx_packet[ pos + 2 ] = 0x30;
eth_tx_packet[ pos + 3 ] = 0x40;
eth_tx_packet[ pos + 4 ] = 0x50;
eth_tx_packet[ pos + 5 ] = 0x60;
pos += 6;
int fill_to_end = 0;
if ( fill_to_end )
{
while ( pos < MAX_FRAME_LEN )
{
eth_tx_packet[ pos ] = (unsigned char) pos;
++pos;
}
}
start_ethernet_send( pos );
wait_until_frame_was_sent();
uart_print( UART1_BASE_ADDR, "Sending the second test frame (which has invalid protocol contents)..." EOL );
pos = 0;
write_broadcast_mac_addr( ð_tx_packet[ pos ] );
pos += MAC_ADDR_LEN;
write_own_mac_addr( ð_tx_packet[ pos ] );
pos += MAC_ADDR_LEN;
eth_tx_packet[ pos + 0 ] = 0x11;
eth_tx_packet[ pos + 1 ] = 0x22;
eth_tx_packet[ pos + 2 ] = 0x33;
eth_tx_packet[ pos + 3 ] = 0x44;
eth_tx_packet[ pos + 4 ] = 0x55;
eth_tx_packet[ pos + 5 ] = 0x66;
pos += 6;
start_ethernet_send( pos );
wait_until_frame_was_sent();
const int dump_all_register_values = 0;
if ( dump_all_register_values )
{
register_read_test();
}
// Main infinite loop.
//
// Wait for incoming frames, dump their contents and reply to a single type of ARP request.
// See the README file for an example on how to generate the right type of APR request with arping.
for ( ; ; )
{
uart_print( UART1_BASE_ADDR, "Waiting for a frame to be received..." EOL );
REG32( get_bd_ptr_addr( s_current_rx_bd_index ) ) = (unsigned long) eth_rx_packet;
uint32_t receive_flags = ETH_RXBD_EMPTY | ETH_RXBD_IRQ;
if ( s_current_rx_bd_index == BUFFER_DESCRIPTOR_COUNT - 1 )
receive_flags += ETH_RXBD_WRAP;
REG32( get_bd_status_addr( s_current_rx_bd_index ) ) = receive_flags;
uint32_t status;
for ( ; ; )
{
status = REG32( get_bd_status_addr( s_current_rx_bd_index ) );
if ( 0 == ( status & ETH_RXBD_EMPTY ) )
{
uart_print( UART1_BASE_ADDR, "Frame received." EOL );
break;
}
}
if ( status & ( ETH_RXBD_OR |
ETH_RXBD_IS |
ETH_RXBD_DN |
ETH_RXBD_TL |
ETH_RXBD_SF |
ETH_RXBD_CRC |
ETH_RXBD_LC ) )
{
uart_print( UART1_BASE_ADDR, "Error receiving frame, rx status is: " );
uart_print_hex( UART1_BASE_ADDR, status, 8 );
uart_print( UART1_BASE_ADDR, EOL );
}
else
{
const int eth_rx_len = ( status >> 16 );
const int should_dump_frame_contents = 0;
if ( should_dump_frame_contents )
{
uart_print( UART1_BASE_ADDR, "Received length: " );
uart_print_int( UART1_BASE_ADDR, eth_rx_len );
uart_print( UART1_BASE_ADDR, EOL );
uart_print( UART1_BASE_ADDR, "Frame data: " );
int i;
for ( i = 0; i < eth_rx_len; i++ )
{
uart_print_hex( UART1_BASE_ADDR, eth_rx_packet[i], 2 );
uart_print( UART1_BASE_ADDR," " );
}
uart_print( UART1_BASE_ADDR, EOL "End of received data." EOL );
}
if ( ! process_received_frame( eth_rx_len ) )
{
uart_print( UART1_BASE_ADDR, "The received frame has been ignored." EOL );
}
}
++s_current_rx_bd_index;
if ( s_current_rx_bd_index == BUFFER_DESCRIPTOR_COUNT )
s_current_rx_bd_index = TX_BD_COUNT;
}
}
