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While sniffing nlmon device the process name can be
printed with non-letter characters because readlink does not
put line ending '\0'
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Fixes sparse warnings like the following in some dissectors:
proto_arp.c:158:17: warning: symbol 'arp_ops' was not declared. Should it be static?
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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The port id field of the netlink message header does not necessarily
indicate the PID of the receiving process [1] (e.g. in case of
multithreaded applications or using multiple sockets). Mention this in
a comment.
[1] http://www.carisma.slowglass.com/~tgr/libnl/doc/core.html#core_netlink_fundamentals
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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In the netlink message dissector, use the PID from the header to look up
the process name of the sending process.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add an initial implementation of a dissector to work on netlink messages
as received from an nlmon device.
Use can use it as follows to monitor netlink traffic to/from the kernel:
modprobe nlmon
ip link add type nlmon
ip link set nlmon0 up
netsniff-ng -i nlmon0
ip link set nlmon 0 down
ip link del dev nlmon0
rmmod nlmon
Fixes: #89
Suggested-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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