关闭网卡合包特性， udp2raw 依然报警

客户端与服务端以 udp2raw+wg 的方式互联，服务端为公网 IPv4 ，udp2raw 客户端报警信息如下，报警触发主要是在最开始远程 rdp 内网主机的时候

[2023-02-20 12:35:39][WARN]huge packet,data len=1452 (>=1375).strongly suggested to set a smaller mtu at upper level,to get rid of this warn
 [2023-02-20 12:35:39][WARN]pcap_sendpcaket failed with vaule -1,send error: PacketSendPacket failed, data_len=1558
[2023-02-20 12:35:39][WARN]huge packet,data len=1452 (>=1375).strongly suggested to set a smaller mtu at upper level,to get rid of this warn
 [2023-02-20 12:35:39][WARN]pcap_sendpcaket failed with vaule -1,send error: PacketSendPacket failed, data_len=1558
[2023-02-20 12:35:39][WARN]huge packet,data len=1452 (>=1375).strongly suggested to set a smaller mtu at upper level,to get rid of this warn
 [2023-02-20 12:35:39][WARN]pcap_sendpcaket failed with vaule -1,send error: PacketSendPacket failed, data_len=1558

应该是 MTU 的问题，服务端是 2 台不同的设备，服务端设置的都是 1280 的 MTU ，除去刷 openwrt 的硬件不同，其他均一致，比如客户端和服务端都加了--fix-gro 参数，用来修复 GRO 特性导致的 MTU 过大问题。

2 台设备分别是：

一台设备用红米 AX6 刷的 openwrt 作为主路由，这个无问题，这台即使开着 GRO 等网卡合并特性，依然不会报警。

一台是 PVE 虚拟直通的 I350 网卡刷的 openwrt 作为旁路由，端口映射到主路由，这台会在初始 rdp 内网主机的时候报警。

2 台 openwrt 网卡信息的主要区别在于 PVE 虚拟机多出 3 个 on 的选项，如下，

tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: on
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: on
tx-gso-list: on

其中 tx-gso-list: on ，我尝试用ethtool -K wg0 gso off关闭不掉，这 3 个 on 从字面看像是分段的，udp2raw 告警和这 3 个 on 有关系吗？

附加 2 台网卡的完整信息

其中 PVE 虚拟机关掉了 GRO LRO GSO TSO ，红米 AX6 没有关掉（刚开始是关掉的，后面重启之后会重新 on ，但是可能加了--fix-gro 参数的缘故，红米 AX6 一直没有问题。）红米 AX6：

Features for wg0:
rx-checksumming: on
tx-checksumming: on
	tx-checksum-ipv4: off [fixed]
	tx-checksum-ip-generic: on
	tx-checksum-ipv6: off [fixed]
	tx-checksum-fcoe-crc: off [fixed]
	tx-checksum-sctp: off [fixed]
scatter-gather: on
	tx-scatter-gather: on
	tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
	tx-tcp-segmentation: on
	tx-tcp-ecn-segmentation: on
	tx-tcp6-segmentation: on
udp-fragmentation-offload: on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: on [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-ipip-segmentation: off [fixed]
tx-sit-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
busy-poll: off [fixed]
rx-gro-hw: off [fixed]

PVE 虚拟机：

root@OpenWrt:~# ethtool --show-offload wg0
Features for wg0:
rx-checksumming: on
tx-checksumming: on
	tx-checksum-ipv4: off [fixed]
	tx-checksum-ip-generic: on
	tx-checksum-ipv6: off [fixed]
	tx-checksum-fcoe-crc: off [fixed]
	tx-checksum-sctp: off [fixed]
scatter-gather: on
	tx-scatter-gather: on
	tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
	tx-tcp-segmentation: off
	tx-tcp-ecn-segmentation: off
	tx-tcp-mangleid-segmentation: off
	tx-tcp6-segmentation: off
generic-segmentation-offload: off
generic-receive-offload: off
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: on [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: on
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: on
tx-gso-list: on
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]