
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>
28 lines
691 B
Go
28 lines
691 B
Go
package dhcpv4
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import (
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"fmt"
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)
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// OptionGeneric is an option that only contains the option code and associated
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// data. Every option that does not have a specific implementation will fall
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// back to this option.
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type OptionGeneric struct {
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Data []byte
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}
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// ToBytes returns a serialized generic option as a slice of bytes.
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func (o OptionGeneric) ToBytes() []byte {
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return o.Data
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}
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// String returns a human-readable representation of a generic option.
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func (o OptionGeneric) String() string {
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return fmt.Sprintf("%v", o.Data)
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}
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// OptGeneric returns a generic option.
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func OptGeneric(code OptionCode, value []byte) Option {
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return Option{Code: code, Value: OptionGeneric{value}}
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}
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