def parse(cls, buf):
(view_num, seq_num, prefix, prefix_len, status, originated_time,
peer_ip, peer_as, attr_len) = struct.unpack_from(cls._HEADER_FMT, buf)
prefix = ip.bin_to_text(prefix)
peer_ip = ip.bin_to_text(peer_ip)
bgp_attr_bin = buf[cls.HEADER_SIZE:cls.HEADER_SIZE + attr_len]
bgp_attributes = []
while bgp_attr_bin:
attr, bgp_attr_bin = bgp._PathAttribute.parser(bgp_attr_bin)
bgp_attributes.append(attr)
return cls(view_num, seq_num, prefix, prefix_len, status,
originated_time, peer_ip, peer_as, bgp_attributes,
attr_len)
def parse(cls, buf):
(peer_as, local_as, if_index, afi) = struct.unpack_from(
cls._HEADER_FMT, buf)
offset = cls.HEADER_SIZE
if afi == cls.AFI_IPv4:
# IPv4 Address
addrs_fmt = cls._ADDRS_FMT % (4, 4)
elif afi == cls.AFI_IPv6:
# IPv6 Address
addrs_fmt = cls._ADDRS_FMT % (16, 16)
else:
raise struct.error('Unsupported address family: %d' % afi)
(peer_ip, local_ip) = struct.unpack_from(addrs_fmt, buf, offset)
peer_ip = ip.bin_to_text(peer_ip)
local_ip = ip.bin_to_text(local_ip)
offset += struct.calcsize(addrs_fmt)
rest = buf[offset:]
bgp_message, _, _ = bgp.BGPMessage.parser(rest)
return cls(peer_as, local_as, if_index,
peer_ip, local_ip, bgp_message, afi)
def parse(cls, buf):
(peer_as, local_as, if_index, afi) = struct.unpack_from(
cls._HEADER_FMT, buf)
offset = cls.HEADER_SIZE
if afi == cls.AFI_IPv4:
# IPv4 Address
addrs_fmt = cls._ADDRS_FMT % (4, 4)
elif afi == cls.AFI_IPv6:
# IPv6 Address
addrs_fmt = cls._ADDRS_FMT % (16, 16)
else:
raise struct.error('Unsupported address family: %d' % afi)
(peer_ip, local_ip) = struct.unpack_from(addrs_fmt, buf, offset)
peer_ip = ip.bin_to_text(peer_ip)
local_ip = ip.bin_to_text(local_ip)
offset += struct.calcsize(addrs_fmt)
(old_state, new_state) = struct.unpack_from(
cls._STATES_FMT, buf, offset)
return cls(peer_as, local_as, if_index,
peer_ip, local_ip, old_state, new_state, afi)
def parse(cls, buf):
(type_, bgp_id) = struct.unpack_from(cls._HEADER_FMT, buf)
bgp_id = addrconv.ipv4.bin_to_text(bgp_id)
offset = cls.HEADER_SIZE
if type_ & cls.IP_ADDR_FAMILY_BIT:
# IPv6 address family
ip_addr_len = 16
else:
# IPv4 address family
ip_addr_len = 4
ip_addr = ip.bin_to_text(buf[offset:offset + ip_addr_len])
offset += ip_addr_len
if type_ & cls.AS_NUMBER_SIZE_BIT:
# Four octet AS number
(as_num,) = struct.unpack_from('!I', buf, offset)
offset += 4
else:
# Two octet AS number
(as_num,) = struct.unpack_from('!H', buf, offset)
offset += 2
return cls(bgp_id, ip_addr, as_num, type_), buf[offset:]