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fix: udp bad checksum on VXLAN interface #4639

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merged 1 commit into from
Oct 22, 2024
Merged

fix: udp bad checksum on VXLAN interface #4639

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2 changes: 2 additions & 0 deletions dist/images/uninstall.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ iptables -t filter -D FORWARD -m set --match-set ovn40subnets src -j ACCEPT
iptables -t filter -D FORWARD -m set --match-set ovn40services dst -j ACCEPT
iptables -t filter -D FORWARD -m set --match-set ovn40services src -j ACCEPT
iptables -t filter -D OUTPUT -p udp -m udp --dport 6081 -j MARK --set-xmark 0x0
iptables -t filter -D OUTPUT -p udp -m udp --dport 4789 -j MARK --set-xmark 0x0
iptables -t filter -D OUTPUT -p tcp -m mark ! --mark 0x4000/0x4000 -m set --match-set ovn40services dst -m conntrack --ctstate NEW -j REJECT
iptables -t mangle -D PREROUTING -m comment --comment "kube-ovn prerouting rules" -j OVN-PREROUTING
iptables -t mangle -D POSTROUTING -m comment --comment "kube-ovn postrouting rules" -j OVN-POSTROUTING
Expand Down Expand Up @@ -63,6 +64,7 @@ ip6tables -t filter -D FORWARD -m set --match-set ovn60subnets src -j ACCEPT
ip6tables -t filter -D FORWARD -m set --match-set ovn60services dst -j ACCEPT
ip6tables -t filter -D FORWARD -m set --match-set ovn60services src -j ACCEPT
ip6tables -t filter -D OUTPUT -p udp -m udp --dport 6081 -j MARK --set-xmark 0x0
ip6tables -t filter -D OUTPUT -p udp -m udp --dport 4789 -j MARK --set-xmark 0x0
ip6tables -t filter -D OUTPUT -p tcp -m mark ! --mark 0x4000/0x4000 -m set --match-set ovn60services dst -m conntrack --ctstate NEW -j REJECT
ip6tables -t mangle -D PREROUTING -m comment --comment "kube-ovn prerouting rules" -j OVN-PREROUTING
ip6tables -t mangle -D POSTROUTING -m comment --comment "kube-ovn postrouting rules" -j OVN-POSTROUTING
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4 changes: 4 additions & 0 deletions pkg/daemon/gateway_linux.go
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Expand Up @@ -591,6 +591,7 @@ func (c *Controller) setIptables() error {
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn40services dst -j ACCEPT`)},
// Output unmark to bypass kernel nat checksum issue https://github.com/flannel-io/flannel/issues/1279
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 6081 -j MARK --set-xmark 0x0`)},
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 4789 -j MARK --set-xmark 0x0`)},
// Drop invalid rst
{Table: MANGLE, Chain: OvnPostrouting, Rule: strings.Fields(`-p tcp -m set --match-set ovn40subnets src -m tcp --tcp-flags RST RST -m state --state INVALID -j DROP`)},
}
Expand Down Expand Up @@ -630,6 +631,7 @@ func (c *Controller) setIptables() error {
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn60services dst -j ACCEPT`)},
// Output unmark to bypass kernel nat checksum issue https://github.com/flannel-io/flannel/issues/1279
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 6081 -j MARK --set-xmark 0x0`)},
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 4789 -j MARK --set-xmark 0x0`)},
// Drop invalid rst
{Table: MANGLE, Chain: OvnPostrouting, Rule: strings.Fields(`-p tcp -m set --match-set ovn60subnets src -m tcp --tcp-flags RST RST -m state --state INVALID -j DROP`)},
}
Expand Down Expand Up @@ -1135,6 +1137,7 @@ func (c *Controller) cleanObsoleteIptablesRules(protocol string, rules []util.IP
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn40services dst -j ACCEPT`)},
// Output unmark to bypass kernel nat checksum issue https://github.com/flannel-io/flannel/issues/1279
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 6081 -j MARK --set-xmark 0x0`)},
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 4789 -j MARK --set-xmark 0x0`)},
}
v6ObsoleteRules = []util.IPTableRule{
{Table: NAT, Chain: Postrouting, Rule: strings.Fields(`-m mark --mark 0x40000/0x40000 -j MASQUERADE`)},
Expand Down Expand Up @@ -1168,6 +1171,7 @@ func (c *Controller) cleanObsoleteIptablesRules(protocol string, rules []util.IP
{Table: "filter", Chain: "FORWARD", Rule: strings.Fields(`-m set --match-set ovn60services dst -j ACCEPT`)},
// Output unmark to bypass kernel nat checksum issue https://github.com/flannel-io/flannel/issues/1279
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 6081 -j MARK --set-xmark 0x0`)},
{Table: "filter", Chain: "OUTPUT", Rule: strings.Fields(`-p udp -m udp --dport 4789 -j MARK --set-xmark 0x0`)},
}
)

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