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add beginnings of tunnel code #35

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This commit is contained in:
Kevin Hester
2020-12-23 12:05:08 +08:00
parent 976d27d0e2
commit 8c4d48b956
4 changed files with 150 additions and 4 deletions
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10
tests/tuntest.py
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@@ -1,6 +1,7 @@
# delete me eventually
# Note python-pytuntap was too buggy
# using pip3 install pytap2
# make sure to "sudo setcap cap_net_admin+eip /usr/bin/python3.8" so python can access tun device without being root
# sudo ip tuntap del mode tun tun0
# FIXME: set MTU correctly
@@ -28,8 +29,13 @@ protocolBlacklist = {
}
def hexstr(barray):
"""Print a string of hex digits"""
return ":".join('{:02x}'.format(x) for x in barray)
def ipstr(barray):
"""Print a string of ip digits"""
return ".".join('{}'.format(x) for x in barray)
def readnet_u16(p, offset):
"""Read big endian u16 (network byte order)"""
return p[offset] * 256 + p[offset + 1]
@@ -66,10 +72,10 @@ def readtest(tap):
ignore = True
logging.debug(f"ignoring blacklisted TCP port {destport}")
else:
logging.warning(f"unexpected protocol 0x{protocol:02x}, srcadddr {hexstr(srcaddr)}")
logging.warning(f"unexpected protocol 0x{protocol:02x}, src={ipstr(srcaddr)}, dest={ipstr(destaddr)}")
if not ignore:
logging.debug(f"Forwarding packet bytes={hexstr(p)}")
logging.debug(f"Forwarding packet bytelen={len(p)} src={ipstr(srcaddr)}, dest={ipstr(destaddr)}")