void
test_copy_mac_address(void) {
lagopus_result_t rc;
const mac_address_t src_mac_addr = {0x11, 0x22, 0x33, 0xAA, 0xBB, 0xCC};
mac_address_t actual_mac_addr = {0, 0, 0, 0, 0, 0};
mac_address_t expected_mac_addr = {0x11, 0x22, 0x33, 0xAA, 0xBB, 0xCC};
rc = copy_mac_address(src_mac_addr, actual_mac_addr);
TEST_ASSERT_EQUAL(LAGOPUS_RESULT_OK, rc);
TEST_ASSERT_EQUAL_UINT8_ARRAY(expected_mac_addr, actual_mac_addr, 6);
}
int main()
{
topology_init();
topology_ops_init();
struct topology_vport vport1;
struct topology_vport vport2;
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x12");
copy_mac_address(vport2.vport_id,"\x12\x12\x12\x12\x12\x13");
int rc=add_vport_node_pairs_into_topology(vport_stub,domain_stub,device_stub,&device_head,&domain_head,&vport1,0x5555,&vport2,0x5556,0x12);
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x11");
copy_mac_address(vport2.vport_id,"\x12\x12\x12\x12\x12\x14");
rc=add_vport_node_pairs_into_topology(vport_stub,domain_stub,device_stub,&device_head,&domain_head,&vport1,0x5555,&vport2,0x5557,0x13);
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x16");
copy_mac_address(vport2.vport_id,"\x12\x12\x12\x12\x12\x13");
rc=add_vport_node_pairs_into_topology(vport_stub,domain_stub,device_stub,&device_head,&domain_head,&vport1,0x5558,&vport2,0x5556,0x12);
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x15");
copy_mac_address(vport2.vport_id,"\x12\x12\x12\x12\x12\x14");
rc=add_vport_node_pairs_into_topology(vport_stub,domain_stub,device_stub,&device_head,&domain_head,&vport1,0x5558,&vport2,0x5557,0x13);
struct topology_vport *vport1_ptr;
struct topology_vport *vport2_ptr;
struct topology_vport *vport3_ptr;
struct topology_vport *vport4_ptr;
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x12");
vport1_ptr=index_hash_element(vport_stub,&vport1,STUB_TYPE_VPORT);
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x13");
vport2_ptr=index_hash_element(vport_stub,&vport1,STUB_TYPE_VPORT);
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x11");
vport3_ptr=index_hash_element(vport_stub,&vport1,STUB_TYPE_VPORT);
copy_mac_address(vport1.vport_id,"\x12\x12\x12\x12\x12\x14");
vport4_ptr=index_hash_element(vport_stub,&vport1,STUB_TYPE_VPORT);
dijstra_find_short_ecmp_path(vport2_ptr,vport4_ptr);
printf("%d\n",debug_cnt);
return 0;
}
static int process_received_frame ( const int frame_len )
{
// At the moment, we can only reply to a single ARP query for our MAC address.
// Use a command like this to make this routine generate an answer:
// With Ubuntu's arping:
// arping -c 1 -f -w 10 -I dpi-tap1 192.168.254.1
// With Thomas Habets' arping:
// sudo ./arping -w 10000000 -c 1 -i dpi-tap1 192.168.254.1
const int ARP_FRAME_LENGTH = 42;
if ( frame_len < ARP_FRAME_LENGTH )
{
uart_print( UART1_BASE_ADDR, "The frame is too short to be the kind of ARP frame we are looking for." EOL );
return 0;
}
int pos = 0;
if ( eth_rx_packet[ pos + 0 ] != BROADCAST_ADDRESS_5 ||
eth_rx_packet[ pos + 1 ] != BROADCAST_ADDRESS_4 ||
eth_rx_packet[ pos + 2 ] != BROADCAST_ADDRESS_3 ||
eth_rx_packet[ pos + 3 ] != BROADCAST_ADDRESS_2 ||
eth_rx_packet[ pos + 4 ] != BROADCAST_ADDRESS_1 ||
eth_rx_packet[ pos + 5 ] != BROADCAST_ADDRESS_0 )
{
uart_print( UART1_BASE_ADDR, "The target MAC address is not broadcast." EOL );
return 0;
}
pos += MAC_ADDR_LEN;
const int src_mac_addr_pos = pos;
uart_print( UART1_BASE_ADDR, "Received broadcast frame from MAC address " );
print_mac_address( ð_rx_packet[ pos ] );
uart_print( UART1_BASE_ADDR, EOL );
pos += MAC_ADDR_LEN;
const unsigned char ARP_PROTOCOL_HI = 0x08;
const unsigned char ARP_PROTOCOL_LO = 0x06;
if ( eth_rx_packet[ pos + 0 ] != ARP_PROTOCOL_HI ||
eth_rx_packet[ pos + 1 ] != ARP_PROTOCOL_LO )
{
uart_print( UART1_BASE_ADDR, "The frame does not contain ARP protocol data." EOL );
return 0;
}
pos += 2;
const unsigned char ETHERNET_HARDWARE_TYPE_HI = 0x00;
const unsigned char ETHERNET_HARDWARE_TYPE_LO = 0x01;
if ( eth_rx_packet[ pos + 0 ] != ETHERNET_HARDWARE_TYPE_HI ||
eth_rx_packet[ pos + 1 ] != ETHERNET_HARDWARE_TYPE_LO )
{
uart_print( UART1_BASE_ADDR, "The ARP frame does not contain the Ethernet hardware type." EOL );
return 0;
}
pos += 2;
const unsigned char IP_PROTOCOL_HI = 0x08;
const unsigned char IP_PROTOCOL_LO = 0x00;
if ( eth_rx_packet[ pos + 0 ] != IP_PROTOCOL_HI ||
eth_rx_packet[ pos + 1 ] != IP_PROTOCOL_LO )
{
uart_print( UART1_BASE_ADDR, "The ARP frame is not about the IP protocol." EOL );
return 0;
}
pos += 2;
const unsigned char HARDWARE_SIZE = MAC_ADDR_LEN;
if ( eth_rx_packet[ pos ] != HARDWARE_SIZE )
{
uart_print( UART1_BASE_ADDR, "The ARP frame has an invalid hardware size." EOL );
return 0;
}
pos += 1;
const unsigned char PROTOCOL_SIZE = IP_ADDR_LEN;
if ( eth_rx_packet[ pos ] != PROTOCOL_SIZE )
{
uart_print( UART1_BASE_ADDR, "The ARP frame has an invalid protocol size." EOL );
return 0;
}
pos += 1;
const unsigned char OPCODE_REQUEST_HI = 0x00;
const unsigned char OPCODE_REQUEST_LO = 0x01;
const unsigned char OPCODE_REPLY_HI = 0x00;
const unsigned char OPCODE_REPLY_LO = 0x02;
if ( eth_rx_packet[ pos + 0 ] != OPCODE_REQUEST_HI ||
eth_rx_packet[ pos + 1 ] != OPCODE_REQUEST_LO )
{
uart_print( UART1_BASE_ADDR, "The ARP frame is not an ARP request." EOL );
return 0;
}
pos += 2;
uart_print( UART1_BASE_ADDR, "The ARP sender MAC address is " );
print_mac_address( ð_rx_packet[ pos ] );
uart_print( UART1_BASE_ADDR, EOL );
pos += MAC_ADDR_LEN;
const int src_ip_addr_pos = pos;
uart_print( UART1_BASE_ADDR, "The ARP sender IP address is " );
print_ip_address( ð_rx_packet[ pos ] );
uart_print( UART1_BASE_ADDR, EOL );
pos += IP_ADDR_LEN;
uart_print( UART1_BASE_ADDR, "The target MAC address is " );
print_mac_address( ð_rx_packet[ pos ] );
uart_print( UART1_BASE_ADDR, EOL );
// Linux uses 0x000000 here, but arping uses 0xFFFFFF.
const int is_zero = eth_rx_packet[ pos + 0 ] == 0 &&
eth_rx_packet[ pos + 1 ] == 0 &&
eth_rx_packet[ pos + 2 ] == 0 &&
eth_rx_packet[ pos + 3 ] == 0 &&
eth_rx_packet[ pos + 4 ] == 0 &&
eth_rx_packet[ pos + 5 ] == 0;
const int is_bcast = eth_rx_packet[ pos + 0 ] == BROADCAST_ADDRESS_5 &&
eth_rx_packet[ pos + 1 ] == BROADCAST_ADDRESS_4 &&
eth_rx_packet[ pos + 2 ] == BROADCAST_ADDRESS_3 &&
eth_rx_packet[ pos + 3 ] == BROADCAST_ADDRESS_2 &&
eth_rx_packet[ pos + 4 ] == BROADCAST_ADDRESS_1 &&
eth_rx_packet[ pos + 5 ] == BROADCAST_ADDRESS_0;
if ( !is_zero && !is_bcast )
{
uart_print( UART1_BASE_ADDR, "The target MAC address is neither zero nor 0xFF." EOL );
return 0;
}
pos += MAC_ADDR_LEN;
uart_print( UART1_BASE_ADDR, "The target IP address is " );
print_ip_address( ð_rx_packet[ pos ] );
uart_print( UART1_BASE_ADDR, EOL );
if ( eth_rx_packet[ pos + 0 ] != OWN_IP_ADDRESS_0 ||
eth_rx_packet[ pos + 1 ] != OWN_IP_ADDRESS_1 ||
eth_rx_packet[ pos + 2 ] != OWN_IP_ADDRESS_2 ||
eth_rx_packet[ pos + 3 ] != OWN_IP_ADDRESS_3 )
{
uart_print( UART1_BASE_ADDR, "The target IP address is not ours." EOL );
return 0;
}
pos += IP_ADDR_LEN;
if ( pos != ARP_FRAME_LENGTH )
{
uart_print( UART1_BASE_ADDR, "Internal error parsing the frame." EOL );
return 0;
}
// Build the ARP reply.
pos = 0;
copy_mac_address( ð_rx_packet[ src_mac_addr_pos ], 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 ] = ARP_PROTOCOL_HI;
eth_tx_packet[ pos + 1 ] = ARP_PROTOCOL_LO;
pos += 2;
eth_tx_packet[ pos + 0 ] = ETHERNET_HARDWARE_TYPE_HI;
eth_tx_packet[ pos + 1 ] = ETHERNET_HARDWARE_TYPE_LO;
pos += 2;
eth_tx_packet[ pos + 0 ] = IP_PROTOCOL_HI;
eth_tx_packet[ pos + 1 ] = IP_PROTOCOL_LO;
pos += 2;
eth_tx_packet[ pos + 0 ] = HARDWARE_SIZE;
pos += 1;
eth_tx_packet[ pos + 0 ] = PROTOCOL_SIZE;
pos += 1;
eth_tx_packet[ pos + 0 ] = OPCODE_REPLY_HI;
eth_tx_packet[ pos + 1 ] = OPCODE_REPLY_LO;
pos += 2;
write_own_mac_addr( ð_tx_packet[ pos ] );
pos += MAC_ADDR_LEN;
eth_tx_packet[ pos + 0 ] = OWN_IP_ADDRESS_0;
eth_tx_packet[ pos + 1 ] = OWN_IP_ADDRESS_1;
eth_tx_packet[ pos + 2 ] = OWN_IP_ADDRESS_2;
eth_tx_packet[ pos + 3 ] = OWN_IP_ADDRESS_3;
pos += IP_ADDR_LEN;
copy_mac_address( ð_rx_packet[ src_mac_addr_pos ], ð_tx_packet[ pos ] );
pos += MAC_ADDR_LEN;
copy_ip_address( ð_rx_packet[ src_ip_addr_pos ], ð_tx_packet[ pos ] );
pos += IP_ADDR_LEN;
if ( pos != ARP_FRAME_LENGTH )
{
uart_print( UART1_BASE_ADDR, "Internal error building the ARP reply frame." EOL );
return 0;
}
// After the ARP information, at the end of the Ethernet packet, comes the dummy CRC,
// which should be 4 bytes with value 0xDEADF00D.
uart_print( UART1_BASE_ADDR, "Sending the ARP reply..." EOL );
start_ethernet_send( ARP_FRAME_LENGTH );
wait_until_frame_was_sent();
uart_print( UART1_BASE_ADDR, "Reply sent." EOL );
return 1;
}
