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

26 lines
802 B
Go

package iana
// EnterpriseID represents the Enterprise IDs as set by IANA
type EnterpriseID int
// See https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers for values
const (
EnterpriseIDCiscoSystems EnterpriseID = 9
EnterpriseIDCienaCorporation EnterpriseID = 1271
EnterpriseIDMellanoxTechnologiesLTD EnterpriseID = 33049
)
var enterpriseIDToStringMap = map[EnterpriseID]string{
EnterpriseIDCiscoSystems: "Cisco Systems",
EnterpriseIDCienaCorporation: "Ciena Corporation",
EnterpriseIDMellanoxTechnologiesLTD: "Mellanox Technologies LTD",
}
// String returns the vendor name for a given Enterprise ID
func (e EnterpriseID) String() string {
if vendor := enterpriseIDToStringMap[e]; vendor != "" {
return vendor
}
return "Unknown"
}