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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>
36 lines
1.8 KiB
Markdown
36 lines
1.8 KiB
Markdown
# packet [](https://github.com/mdlayher/packet/actions) [](https://pkg.go.dev/github.com/mdlayher/packet) [](https://goreportcard.com/report/github.com/mdlayher/packet)
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Package `packet` provides access to Linux packet sockets (`AF_PACKET`). MIT
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Licensed.
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## Stability
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See the [CHANGELOG](./CHANGELOG.md) file for a description of changes between
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releases.
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This package has a stable v1 API and any future breaking changes will prompt
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the release of a new major version. Features and bug fixes will continue to
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occur in the v1.x.x series.
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This package only supports the two most recent major versions of Go, mirroring
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Go's own release policy. Older versions of Go may lack critical features and bug
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fixes which are necessary for this package to function correctly.
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## History
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One of my first major Go networking projects was
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[`github.com/mdlayher/raw`](https://github.com/mdlayher/raw), which provided
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access to Linux `AF_PACKET` sockets and *BSD equivalent mechanisms for sending
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and receiving Ethernet frames. However, the *BSD support languished and I lack
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the expertise and time to properly maintain code for operating systems I do not
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use on a daily basis.
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Package `packet` is a successor to package `raw`, but exclusively focused on
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Linux and `AF_PACKET` sockets. The APIs are nearly identical, but with a few
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changes which take into account some of the lessons learned while working on
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`raw`.
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Users are highly encouraged to migrate any existing Linux uses of `raw` to
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package `packet` instead. This package will be supported for the foreseeable
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future and will receive continued updates as necessary.
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