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

3.7 KiB

Raw Blame History

CHANGELOG

v0.5.1

[Improvement]: revert go.mod to Go 1.20 to resolve an issue around Go module version upgrades.

v0.5.0

This is the first release of package socket that only supports Go 1.21+. Users on older versions of Go must use v0.4.1.

[Improvement]: drop support for older versions of Go.
[New API]: add socket.Conn wrappers for various Getsockopt and Setsockopt system calls.

v0.4.1

[Bug Fix] commit: ensure socket.Conn can be used with non-socket file descriptors by handling ENOTSOCK in the constructor.

v0.4.0

This is the first release of package socket that only supports Go 1.18+. Users on older versions of Go must use v0.3.0.

[Improvement]: drop support for older versions of Go so we can begin using modern versions of x/sys and other dependencies.

v0.3.0

This is the last release of package socket that supports Go 1.17 and below.

[New API/API change] PR: numerous socket.Conn methods now support context cancelation. Future releases will continue adding support as needed.
- New ReadContext and WriteContext methods.
- Connect, Recvfrom, Recvmsg, Sendmsg, and Sendto methods now accept a context.
- Sendto parameter order was also fixed to match the underlying syscall.

v0.2.3

[New API] commit: socket.Conn has new Pidfd* methods for wrapping the pidfd_*(2) family of system calls.

v0.2.2

[New API] commit: socket.Conn has new IoctlKCM* methods for wrapping ioctl(2) for AF_KCM operations.

v0.2.1

[New API] commit: socket.Conn has a new SetsockoptPacketMreq method for wrapping setsockopt(2) for AF_PACKET socket options.

v0.2.0

[New API] commit: socket.FileConn can be used to create a socket.Conn from an existing os.File, which may be provided by systemd socket activation or another external mechanism.
[API change] commit: socket.Conn.Connect now returns the unix.Sockaddr value provided by getpeername(2), since we have to invoke that system call anyway to verify that a connection to a remote peer was successfully established.
[Bug Fix] commit: check the correct error from unix.GetsockoptInt in the socket.Conn.Connect method. Thanks @vcabbage!

v0.1.2

[Bug Fix]: socket.Conn.Connect now properly checks the SO_ERROR socket option value after calling connect(2) to verify whether or not a connection could successfully be established. This means that Connect should now report an error for an AF_INET TCP connection refused or AF_VSOCK connection reset by peer.
[New API]: add socket.Conn.Getpeername for use in Connect, but also for use by external callers.

v0.1.1

[New API]: socket.Conn now has CloseRead, CloseWrite, and Shutdown methods.
[Improvement]: internal rework to more robustly handle various errors.

v0.1.0

Initial unstable release. Most functionality has been developed and ported from package netlink.

3.7 KiB Raw Blame History