
Security News
Official Go SDK for MCP in Development, Stable Release Expected in August
The official Go SDK for the Model Context Protocol is in development, with a stable, production-ready release expected by August 2025.
github.com/jsimonetti/rtnetlink
Package rtnetlink
allows the kernel's routing tables to be read and
altered. Network routes, IP addresses, Link parameters, Neighbor setups,
Queueing disciplines, Traffic classes and Packet classifiers may all be
controlled. It is based on netlink messages.
A convenient, high-level API wrapper is available using package
rtnl
.
The base rtnetlink
library explicitly only exposes a limited low-level API to
rtnetlink. It is not the intention (nor wish) to create an iproute2
replacement.
Unfortunately the errors generated by the kernels netlink interface are not very great.
When in doubt about your message structure it can always be useful to
look at the message send by iproute2 using strace -f -esendmsg /bin/ip
or similar.
Another (and possibly even more flexible) way would be using nlmon
and
wireshark
. nlmod is a special kernel module which allows you to
capture all netlink (not just rtnetlink) traffic inside the kernel. Be
aware that this might be overwhelming on a system with a lot of netlink
traffic.
# modprobe nlmon
# ip link add type nlmon
# ip link set nlmon0 up
At this point use wireshark or tcpdump on the nlmon0 interface to view all netlink traffic.
Have a look at the examples for common uses of rtnetlink.
If you have any questions or you'd like some guidance, please join us on
Gophers Slack in the #networking
channel!
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