def route_for_packet(self, test_packet, fields):
field_data = self._fields_for_packet(test_packet)
table = self._table_for_bind(field_data['dst_addr'], field_data['dst_port'])
rt = GLBRendezvousTable(table['seed'].decode('hex'))
hosts = self._hosts_for_table(table)
hash_key_bytes = self._key_for_bind(field_data['dst_addr'], field_data['dst_port'])
hash_row = self.pkt_hash(hash_key_bytes, fields=fields, **field_data) & 0xffff
return rt.forwarding_table_entry(hash_row, hosts)[:2]
def test_row_seeds(self):
"""GLBRendezvousTable correctly calculates valid row seeds"""
forwarding_table_seed = '49a3d861d661ae5ab06ed9326871a2f5'.decode(
'hex')
table = GLBRendezvousTable(forwarding_table_seed)
assert_equals(
table.calculate_forwarding_table_row_seed(0x0000).encode('hex'),
'491c53a72df4c837')
assert_equals(
table.calculate_forwarding_table_row_seed(0xffff).encode('hex'),
'f223c0cc65161620')
def test_order_hosts_bb44(self):
"""
GLBRendezvousTable correctly orders hosts (index=0xbb44)
row seed: e290f8f430eb33d3
1.1.1.1 3595c936c995ae63
1.1.1.2 db40d5031678c90a
1.1.1.3 eb798632d691530c
1.1.1.4 0676eaf9cb7d2f85
"""
forwarding_table_seed = '49a3d861d661ae5ab06ed9326871a2f5'.decode(
'hex')
table = GLBRendezvousTable(forwarding_table_seed)
hosts = ['1.1.1.1', '1.1.1.2', '1.1.1.3', '1.1.1.4']
a, b, c, d = hosts
assert_equals(table.forwarding_table_entry(0xbb44, hosts),
[d, a, b, c])
def test_order_hosts_ffff(self):
"""
GLBRendezvousTable correctly orders hosts (index=0xffff)
row seed: f223c0cc65161620
1.1.1.1 0233ef12d7a983d9
1.1.1.2 6414aa65f0a10601
1.1.1.3 af48ea8c83867829
1.1.1.4 a1f610df9fbb2025
"""
forwarding_table_seed = '49a3d861d661ae5ab06ed9326871a2f5'.decode(
'hex')
table = GLBRendezvousTable(forwarding_table_seed)
hosts = ['1.1.1.1', '1.1.1.2', '1.1.1.3', '1.1.1.4']
a, b, c, d = hosts
assert_equals(table.forwarding_table_entry(0xffff, hosts),
[a, b, d, c])
def test_order_hosts_0000(self):
"""
GLBRendezvousTable correctly orders hosts (index=0x0000)
row seed: 491c53a72df4c837
1.1.1.1 e47127dd8fe077de
1.1.1.2 8b1ddec5575c8634
1.1.1.3 705425e3e522989b
1.1.1.4 6f022ce1ea607e16
"""
forwarding_table_seed = '49a3d861d661ae5ab06ed9326871a2f5'.decode(
'hex')
table = GLBRendezvousTable(forwarding_table_seed)
hosts = ['1.1.1.1', '1.1.1.2', '1.1.1.3', '1.1.1.4']
a, b, c, d = hosts
assert_equals(table.forwarding_table_entry(0x0000, hosts),
[d, c, b, a])
def get_example_table_reference_implementation(self, table_index):
table_config = self.get_example_config()['tables'][table_index]
return GLBRendezvousTable(table_config['seed'].decode('hex'))