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Fix p0f ittl #28

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Fix p0f ittl #28

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b13023f
fix ittl with distance
Jun 26, 2025
7a7ca1b
fix ittl with unknown initial ttl
Jun 26, 2025
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4 changes: 3 additions & 1 deletion bpftools/p0f.py
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,8 @@ def parse_ittl(self):
if self.ittl.endswith("-"):
self.ttl_rand = True
else:
if "+" in self.ittl:
self.ittl, _ = self.ittl.split("+")
self.ttl_rand = False

def parse_win_size(self):
Expand All @@ -78,7 +80,7 @@ def parse_sig(self):
if self.ver != '4' and self.ver != '6':
raise ValueError("IP version must be either 4 or 6")

if not re.match("^(\d+)-?$", self.ittl):
if not re.match("^(\d+)(-|\+\d+|\+\?)?$", self.ittl):
raise ValueError("Invalid ttl field")
self.parse_ittl()

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