def _parse_header(cls, buf, offset):
fmt = "!HHHHHH"
reqlen = struct.calcsize(fmt)
strng = buf[offset:offset + reqlen]
res = struct.unpack(fmt, strng)
hdr = {"ID": res[0]}
qr = 0x8000
opcode_mask = 0x7800
opcode_shift = 11
aa = 0x0400
tc = 0x0200
rd = 0x0100
ra = 0x0080
z_mask = 0x0070
z_shift = 4
rcode_mask = 0x000F
rcode_shift = 0
hdr['QR'] = not not (res[1] & qr)
hdr['OpCode'] = opcode_to_text((res[1] & opcode_mask) >> opcode_shift)
hdr['AA'] = not not (res[1] & aa)
hdr['TC'] = not not (res[1] & tc)
hdr['RD'] = not not (res[1] & rd)
hdr['RA'] = not not (res[1] & ra)
hdr['Z'] = (res[1] & z_mask) >> z_shift
hdr['ReturnCode'] = rcode_to_text((res[1] & rcode_mask) >> rcode_shift)
hdr['QDCOUNT'] = res[2]
hdr['ANCOUNT'] = res[3]
hdr['NSCOUNT'] = res[4]
hdr['ARCOUNT'] = res[5]
return offset + reqlen, hdr
def do_header(buf, offset):
fmt = "!HHHHHH"
reqlen = struct.calcsize(fmt)
#print(reqlen)
str = buf[offset:offset + reqlen]
res = struct.unpack(fmt, str)
hdr = {}
hdr['ID'] = res[0]
QR = 0x8000
Opcode_mask = 0x7800
Opcode_shift = 11
AA = 0x0400
TC = 0x0200
RD = 0x0100
RA = 0x0080
Z = 0x0040
AD = 0x0020
CD = 0x0010
RCODE_mask = 0x000F
RCODE_shift = 0
hdr['QR'] = not not (res[1] & QR)
hdr['OpCode'] = opcode_to_text((res[1] & Opcode_mask) >> Opcode_shift)
hdr['AA'] = not not (res[1] & AA)
hdr['TC'] = not not (res[1] & TC)
hdr['RD'] = not not (res[1] & RD)
hdr['RA'] = not not (res[1] & RA)
hdr['Z'] = not not (res[1] & Z)
hdr['AD'] = not not (res[1] & AD)
hdr['CD'] = not not (res[1] & CD)
hdr['ReturnCode'] = rcode_to_text((res[1] & RCODE_mask) >> RCODE_shift)
hdr['QDCOUNT'] = res[2]
hdr['ANCOUNT'] = res[3]
hdr['NSCOUNT'] = res[4]
hdr['ARCOUNT'] = res[5]
#print ('Header Ok')
return (offset + reqlen, hdr)
def do_header(buf, offset):
fmt= "!HHHHHH"
reqlen= struct.calcsize(fmt)
str= buf[offset:offset+reqlen]
res= struct.unpack(fmt, str)
#print res
hdr={}
hdr['ID']= res[0]
QR= 0x8000
Opcode_mask= 0x7800
Opcode_shift= 11
AA= 0x0400
TC= 0x0200
RD= 0x0100
RA= 0x0080
Z= 0x0040
AD= 0x0020
CD= 0x0010
RCODE_mask= 0x000F
RCODE_shift= 0
hdr['QR']= not not(res[1] & QR)
hdr['OpCode']= opcode_to_text((res[1] & Opcode_mask) >> Opcode_shift)
hdr['AA']= not not(res[1] & AA)
hdr['TC']= not not(res[1] & TC)
hdr['RD']= not not(res[1] & RD)
hdr['RA']= not not(res[1] & RA)
hdr['Z']= not not(res[1] & Z)
hdr['AD']= not not(res[1] & AD)
hdr['CD']= not not(res[1] & CD)
hdr['ReturnCode']= rcode_to_text((res[1] & RCODE_mask) >> RCODE_shift)
hdr['QDCOUNT']= res[2]
hdr['ANCOUNT']= res[3]
hdr['NSCOUNT']= res[4]
hdr['ARCOUNT']= res[5]
return (offset+reqlen, hdr)
def _parse_header(cls, buf, offset):
fmt = "!HHHHHH"
reqlen = struct.calcsize(fmt)
strng = buf[offset:offset + reqlen]
res = struct.unpack(fmt, strng)
hdr = {
"ID": res[0]
}
qr = 0x8000
opcode_mask = 0x7800
opcode_shift = 11
aa = 0x0400
tc = 0x0200
rd = 0x0100
ra = 0x0080
z_mask = 0x0070
z_shift = 4
rcode_mask = 0x000F
rcode_shift = 0
hdr['QR'] = not not(res[1] & qr)
hdr['OpCode'] = opcode_to_text((res[1] & opcode_mask) >> opcode_shift)
hdr['AA'] = not not(res[1] & aa)
hdr['TC'] = not not(res[1] & tc)
hdr['RD'] = not not(res[1] & rd)
hdr['RA'] = not not(res[1] & ra)
hdr['Z'] = (res[1] & z_mask) >> z_shift
hdr['ReturnCode'] = rcode_to_text((res[1] & rcode_mask) >> rcode_shift)
hdr['QDCOUNT'] = res[2]
hdr['ANCOUNT'] = res[3]
hdr['NSCOUNT'] = res[4]
hdr['ARCOUNT'] = res[5]
return offset + reqlen, hdr