replace toHex() with binascii.hexlify()

examples/networking/http_filter/http-parse-complete.py

@@ -29,18 +29,6 @@
 MAX_AGE_SECONDS = 30 # max age entry in bpf_sessions map
 
 
-# convert a bin string into a string of hex char
-# helper function to print raw packet in hex
-def toHex(s):
- lst = ""
- for ch in s:
- hv = hex(ord(ch)).replace('0x', '')
- if len(hv) == 1:
- hv = '0' + hv
- lst = lst + hv
- return lst
-
-
 # print str until CR+LF
 def printUntilCRLF(s):
  print(s.split(b'\r\n')[0].decode())
@@ -151,7 +139,7 @@ def help():
  packet_count += 1
 
  # DEBUG - print raw packet in hex format
- # packet_hex = toHex(packet_str)
+ # packet_hex = binascii.hexlify(packet_str)
  # print ("%s" % packet_hex)
 
  # convert packet into bytearray
@@ -188,8 +176,8 @@ def help():
  ip_src_str = packet_str[ETH_HLEN + 12: ETH_HLEN + 16] # ip source offset 12..15
  ip_dst_str = packet_str[ETH_HLEN + 16:ETH_HLEN + 20] # ip dest offset 16..19
 
- ip_src = int(toHex(ip_src_str), 16)
- ip_dst = int(toHex(ip_dst_str), 16)
+ ip_src = int(binascii.hexlify(ip_src_str), 16)
+ ip_dst = int(binascii.hexlify(ip_dst_str), 16)
 
  # TCP HEADER
  # https://www.rfc-editor.org/rfc/rfc793.txt
@@ -215,8 +203,8 @@ def help():
  port_src_str = packet_str[ETH_HLEN + ip_header_length:ETH_HLEN + ip_header_length + 2]
  port_dst_str = packet_str[ETH_HLEN + ip_header_length + 2:ETH_HLEN + ip_header_length + 4]
 
- port_src = int(toHex(port_src_str), 16)
- port_dst = int(toHex(port_dst_str), 16)
+ port_src = int(binascii.hexlify(port_src_str), 16)
+ port_dst = int(binascii.hexlify(port_dst_str), 16)
 
  # calculate payload offset
  payload_offset = ETH_HLEN + ip_header_length + tcp_header_length