History

Songmin Li d61e7e5e1f fix(dhcp): can not renew an ip address

The dhcp server is systemd-networkd, and the dhcp
plugin can request an ip but can not renew it.
The systemd-networkd just ignore the renew request.

```
2024/09/14 21:46:00 no DHCP packet received within 10s
2024/09/14 21:46:00 retrying in 31.529038 seconds
2024/09/14 21:46:42 no DHCP packet received within 10s
2024/09/14 21:46:42 retrying in 63.150490 seconds
2024/09/14 21:47:45 98184616c91f15419f5cacd012697f85afaa2daeb5d3233e28b0ec21589fb45a/iot/eth1: no more tries
2024/09/14 21:47:45 98184616c91f15419f5cacd012697f85afaa2daeb5d3233e28b0ec21589fb45a/iot/eth1: renewal time expired, rebinding
2024/09/14 21:47:45 Link "eth1" down. Attempting to set up
2024/09/14 21:47:45 98184616c91f15419f5cacd012697f85afaa2daeb5d3233e28b0ec21589fb45a/iot/eth1: lease rebound, expiration is 2024-09-14 22:47:45.309270751 +0800 CST m=+11730.048516519
```

Follow the https://datatracker.ietf.org/doc/html/rfc2131#section-4.3.6,
following options must not be sent in renew

- Requested IP Address
- Server Identifier

Since the upstream code has been inactive for 6 years,
we should switch to another dhcpv4 library.
The new selected one is https://github.com/insomniacslk/dhcp.

Signed-off-by: Songmin Li <lisongmin@protonmail.com>

2024-10-14 17:42:30 +02:00

.gitignore

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CHANGELOG.md

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doc.go

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LICENSE.md

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packet_linux.go

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packet_others.go

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packet.go

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README.md

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README.md

packet

Package packet provides access to Linux packet sockets (AF_PACKET). MIT Licensed.

Stability

See the CHANGELOG file for a description of changes between releases.

This package has a stable v1 API and any future breaking changes will prompt the release of a new major version. Features and bug fixes will continue to occur in the v1.x.x series.

This package only supports the two most recent major versions of Go, mirroring Go's own release policy. Older versions of Go may lack critical features and bug fixes which are necessary for this package to function correctly.

History

One of my first major Go networking projects was github.com/mdlayher/raw, which provided access to Linux AF_PACKET sockets and *BSD equivalent mechanisms for sending and receiving Ethernet frames. However, the *BSD support languished and I lack the expertise and time to properly maintain code for operating systems I do not use on a daily basis.

Package packet is a successor to package raw, but exclusively focused on Linux and AF_PACKET sockets. The APIs are nearly identical, but with a few changes which take into account some of the lessons learned while working on raw.

Users are highly encouraged to migrate any existing Linux uses of raw to package packet instead. This package will be supported for the foreseeable future and will receive continued updates as necessary.