def get_rddata(self, l, type, dlen, beg_index):
if beg_index + dlen > len(l):
raise Trunc('(dns) truncated rdata')
# A
if type == 1:
if dlen != 4:
raise Exception('(dns) invalid a data size', system='packet')
return IPAddr(l[beg_index:beg_index + 4])
# AAAA
elif type == 28:
if dlen != 16:
raise Exception('(dns) invalid a data size', system='packet')
return IPAddr6.from_raw(l[beg_index:beg_index + dlen])
# NS
elif type == 2:
return self.read_dns_name_from_index(l, beg_index)[1]
# PTR
elif type == 12:
return self.read_dns_name_from_index(l, beg_index)[1]
# CNAME
elif type == 5:
return self.read_dns_name_from_index(l, beg_index)[1]
# MX
elif type == 15:
#TODO: Save priority (don't just jump past it)
return self.read_dns_name_from_index(l, beg_index + 2)[1]
else:
return l[beg_index:beg_index + dlen]
def get_rddata(self, l, type, dlen, beg_index):
if beg_index + dlen > len(l):
raise Trunc('(dns) truncated rdata')
# A
if type == 1:
if dlen != 4:
raise Exception('(dns) invalid a data size',system='packet')
return IPAddr(l[beg_index : beg_index + 4])
# AAAA
elif type == 28:
if dlen != 16:
raise Exception('(dns) invalid a data size',system='packet')
return IPAddr6.from_raw(l[beg_index : beg_index + dlen])
# NS
elif type == 2:
return self.read_dns_name_from_index(l, beg_index)[1]
# PTR
elif type == 12:
return self.read_dns_name_from_index(l, beg_index)[1]
# CNAME
elif type == 5:
return self.read_dns_name_from_index(l, beg_index)[1]
# MX
elif type == 15:
#TODO: Save priority (don't just jump past it)
return self.read_dns_name_from_index(l, beg_index + 2)[1]
else:
return l[beg_index : beg_index + dlen]
def ip6(addr):
if addr is None:
return None
return IPAddr6.from_raw(addr)
def ip6(addr):
if addr is None: return None
return IPAddr6.from_raw(addr)