d61e7e5e1f
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>
20 lines
389 B
Go
20 lines
389 B
Go
// +build darwin
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package interfaces
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import (
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"net"
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"golang.org/x/sys/unix"
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)
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// BindToInterface emulates linux's SO_BINDTODEVICE option for a socket by using
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// IP_BOUND_IF.
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func BindToInterface(fd int, ifname string) error {
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iface, err := net.InterfaceByName(ifname)
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if err != nil {
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return err
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}
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return unix.SetsockoptInt(fd, unix.IPPROTO_IP, unix.IP_BOUND_IF, iface.Index)
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}
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