Awesome
trparse
Parses the output of a traceroute or traceroute6 execution into an AST (Abstract Syntax Tree) built up from:
- a Traceroute root
- Hop inner nodes
- Probe leaf nodes
Every node is printable and the entire tree is printable from the root.
Supports the following info. Parsed info in bold:
-
Header:
- Destination Hostname
- (Destination IP address)
-
Hop
- Hop counter
- [AS#]
- Probe
- Hostname
- (IP address)
- RTT
- !Annotation
Usage
import trparse
s = <some_output_from_traceroute>
# Parse the traceroute output
traceroute = trparse.loads(s)
# You can print the result
print traceroute
# Save it as string
tr_str = str(traceroute)
# Or travel the tree
hop = traceroute.hops[0]
probe = hop.probes[0]
# And print the IP address
print probe.ip
Data structures
-
Traceroute
- dest_name :: <str>
- dest_ip :: <str>
- hops :: <list<Hop>>
-
Hop
- idx :: <int>
- probes :: <list<Probe>>
-
Probe
- name :: <str>
- ip :: <str>
- asn :: <int>
- rtt :: <float>
- anno :: <str>
Considerations
trparse is based on the output of the traceroute
command in OSX and
Linux. It parses the text based on regular expressions, so there are
some tokens it expects to find in a specific format. For example:
- Destination Hostname and (Destination IP Address) must be in the same line separated only by one or more space characters. They must be found in the header zone (typically the first two lines), before any hop result.
- (Destination IP Address) must be surrounded by parenthesis
- Hop counter must be the first token in its line. There can be lines starting with another token, but if there is a Hop counter in a line, it has to be the first token in that line. (can be preceded by space characters).
- [AS#] must be surrounded by square brackets
[]
and start withAS
. - Hostname Can be a hostname or its IP address without parenthesis
- (IP address) either IPv4 or IPv6 must surrounded by parenthesis
()
. - RTT must be in integer (without commas or dots) or float format
(with one (and only one) dot) separated from the
ms
literal by a least one space character. - !Annotation must start with a
!
symbol followed by non-space characters and there can't be more than one per probe.
Windows's tracert
output does not meet these conditions so it won't
work in a Widows system. Maybe in a future release.
Changelog
v0.3.0
- Rebuilt the parsing function to support RTT, IP, Name and ASN in any order inside the hop/probe.
- RTT values are now Decimal.
- Improved
__str__
output. - Moved ASN from Hop to Probe