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=======

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`](https://godoc.org/github.com/jsimonetti/rtnetlink/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.

### Debugging and netlink errors
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](https://invite.slack.golangbridge.org) in the `#networking`
channel!


Socket Acquires Coana to Bring Reachability Analysis to Every Appsec Team

github.com/jsimonetti/rtnetlink

rtnetlink

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Bad semver

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Bad dependency semver

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Bidirectional unicode control characters

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What is bin script confusion?

Bin script confusion

Semantic versions published out of chronological order.

What is a chronological version anomaly?

Chronological version anomaly

Project maintainer's SSH key has been compromised.

What is a compromised SSH key?

Compromised SSH key

(Experimental) Copyleft license information was found.

What do I need to know about license files?

Copyleft License

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Title

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High CVE

Uses debug, reflection and dynamic code execution features.

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Debug access

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Deprecated

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Deprecated SPDX exception

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Deprecated license

Package name is similar to other popular packages and may not be the package you want.

What is a typosquat?

Possible typosquat attack

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Dynamic require

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Empty package

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Environment variable access

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Name

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File dependency

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Filesystem access

Package has a dependency with a floating version range. This can cause issues if the dependency publishes a new major version.

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Wildcard dependency

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Git dependency

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AI-detected potential security risk

Contains native code (e.g., compiled binaries or shared libraries). Including native code can obscure malicious behavior.

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Native code

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High entropy strings

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Unicode homoglyphs

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HTTP dependency

Install scripts are run when the package is installed. The majority of malware in npm is hidden in install scripts.

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Install scripts

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Invalid manifest file

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What are invisible characters?

Invisible chars

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What's wrong with long strings?

Long strings

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Major refactor

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Known malware

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Manifest confusion

Contains a medium severity Common Vulnerability and Exposure (CVE).

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Medium CVE

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What is a mild CVE?

Low CVE

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Minified code

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Misc. License Issues

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Non-existent author

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Missing dependency

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Missing license

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Modified license exception

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What is a modified license?

Modified license

What is network access?

Network access

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What is new author?

New author

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Why is contributor and author data important?

No contributors or author data

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No bug tracker

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No repository

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No tests

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

github.com/jsimonetti/rtnetlink

Debugging and netlink errors

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