None,
length_of="CGA_PARAMS",
fmt="B",
adjust=lambda pkt, x:
(x + pkt.padlength + 4) // 8), # noqa: E501
FieldLenField("padlength", 0, length_of="padding", fmt="B"),
ByteField("reserved", 0),
PacketLenField("CGA_PARAMS",
"",
CGA_Params,
length_from=lambda pkt: pkt.len * 8 - pkt.padlength - 4
), # noqa: E501
StrLenField("padding", "", length_from=lambda pkt: pkt.padlength)
] # noqa: E501
def post_build(self, p, pay):
l_ = len(self.CGA_PARAMS)
tmp_len = -(4 + l_) % 8 # Pad to 8 bytes
p = p[:1] + chb((4 + l_ + tmp_len) // 8) + chb(tmp_len) + p[3:4 + l_]
p += b"\x00" * tmp_len + pay
return p
send_icmp6ndoptscls = {
11: ICMPv6NDOptCGA,
12: ICMPv6NDOptRsaSig,
13: ICMPv6NDOptTmstp,
14: ICMPv6NDOptNonce
}
icmp6ndoptscls.update(send_icmp6ndoptscls)
name = "CGA Parameters data structure"
fields_desc = [StrFixedLenField("modifier", RandBin(size=16), length=16),
StrFixedLenField("subprefix", "", length=8),
ByteField("cc", 0),
PacketField("pubkey", X509_SubjectPublicKeyInfo(),
X509_SubjectPublicKeyInfo)]
class ICMPv6NDOptCGA(_ICMPv6NDGuessPayload, Packet):
name = "ICMPv6NDOptCGA"
fields_desc = [ByteField("type", 11),
FieldLenField("len", None, length_of="CGA_PARAMS", fmt="B", adjust=lambda pkt, x: (x + pkt.padlength + 4) // 8), # noqa: E501
FieldLenField("padlength", 0, length_of="padding", fmt="B"),
ByteField("reserved", 0),
PacketLenField("CGA_PARAMS", "", CGA_Params, length_from=lambda pkt: pkt.len * 8 - pkt.padlength - 4), # noqa: E501
StrLenField("padding", "", length_from=lambda pkt: pkt.padlength)] # noqa: E501
def post_build(self, p, pay):
l_ = len(self.CGA_PARAMS)
l = -(4 + l_) % 8 # Pad to 8 bytes
p = p[:1] + chb((4 + l_ + l) // 8) + chb(l) + p[3:4 + l_] + b"\x00" * l + pay # noqa: E501
return p
send_icmp6ndoptscls = {11: ICMPv6NDOptCGA,
12: ICMPv6NDOptRsaSig,
13: ICMPv6NDOptTmstp,
14: ICMPv6NDOptNonce
}
icmp6ndoptscls.update(send_icmp6ndoptscls)