问题描述
Surge 在正常运行过程中出现此问题，如下图：
DHCP 日志如下：
Internet Systems Consortium DHCP Server 4.4.2
Copyright 2004-2020 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Config file: /Users/USERNAME/Library/Application Support/com.nssurge.surge-mac/dhcpd/dhcpd.conf
Database file: /Users/USERNAME/Library/Application Support/com.nssurge.surge-mac/dhcpd/lease
PID file: /Users/USERNAME/Library/Application Support/com.nssurge.surge-mac/dhcpd/pid
Wrote 0 deleted host decls to leases file.
Wrote 0 new dynamic host decls to leases file.
Wrote 65 leases to leases file.
Listening on BPF/en4/00:0e:c6:c2:35:54/192.168.31.0/24
Sending on BPF/en4/00:0e:c6:c2:35:54/192.168.31.0/24
Can't bind to dhcp address: Address already in use
Please make sure there is no other dhcp server
running and that there's no entry for dhcp or
bootp in /etc/inetd.conf. Also make sure you
are not running HP JetAdmin software, which
includes a bootp server.
If you think you have received this message due to a bug rather
than a configuration issue please read the section on submitting
bugs on either our web page at www.isc.org or in the README file
before submitting a bug. These pages explain the proper
process and the information we find helpful for debugging.
exiting.
解决方法
查看 DHCP 占用
zhaochunqi in 🌐 Alexs-MacBook-Pro in ~
❯ sudo lsof -i :67
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
launchd 1 root 15u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
launchd 1 root 25u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
launchd 1 root 54u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
launchd 1 root 55u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
bootpd 3970 root 0u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
bootpd 3970 root 1u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
bootpd 3970 root 2u IPv4 0xe266e99ee0d4eae7 0t0 UDP *:bootps
可以看到 launchd 和 bootpd 进程正在使用端口 67，这意味着两个端口可能存在冲突。但是之前已经多次 kill 3970 这个进程，但没有效果，需要处理掉 PID 为 1 的这个进程。
禁用开启启动服务
如果 bootpd 是一个服务，应该使用以下命令禁用它：
sudo launchctl unload -w /System/Library/LaunchDaemons/bootps.plist
这指的是关闭 bootpd 进程的开机启动。此步骤可能因 MacOS 版本而异。运行命令后，如果系统中没有这个文件或者服务，也请检查 /Library/LaunchDaemons 和 /Library/LaunchAgents 目录，看看是否存在相关的服务。
通过上述方法成功解决了问题！
题外
之前在 Surge 社区问了一下，得到作者回复，但是没有完全解决问题，后续我发现了解决方法补充到了社区。