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Fix ValidateExpectedRoute with non default routes and nil GW

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Using ptp plugin with non default routes, we get the following error
when cri-o call CheckNetworkList():
```
Expected Route {Dst:{IP:198.18.128.0 Mask:ffff8000} GW:<nil>} not found in routing table
```
Using cniVersion 0.3.1 to bypass the check, we can see that the
route is added with a gateway
```
$ ip r
198.18.0.0/17 via 198.18.0.1 dev eth0 src 198.18.3.102
198.18.0.1 dev eth0 scope link src 198.18.3.102
198.18.128.0/17 via 198.18.0.1 dev eth0
```

If GW is nil only check if we have a route with a DST that matches, and
ignore the GW.

Fixes #886
Signed-off-by: Etienne Champetier <e.champetier@ateme.com>
This commit is contained in:
Etienne Champetier 2023-04-20 14:37:58 -04:00
parent 9f1f9a588b
commit c347755f87
2 changed files with 10 additions and 2 deletions
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5
pkg/ip/utils_linux.go
View File

@ -83,7 +83,10 @@ func ValidateExpectedRoute(resultRoutes []*types.Route) error {
// Ensure that each static route in prevResults is found in the routing table
for _, route := range resultRoutes {
find := &netlink.Route{Dst: &route.Dst, Gw: route.GW}
routeFilter := netlink.RT_FILTER_DST | netlink.RT_FILTER_GW
routeFilter := netlink.RT_FILTER_DST
if route.GW != nil {
routeFilter |= netlink.RT_FILTER_GW
}
var family int
switch {

7
plugins/main/ptp/ptp_test.go
View File

@ -368,7 +368,7 @@ var _ = Describe("ptp Operations", func() {
doTest(conf, ver, 1, dnsConf, targetNS)
})
It(fmt.Sprintf("[%s] configures and deconfigures a dual-stack ptp link with ADD/DEL", ver), func() {
It(fmt.Sprintf("[%s] configures and deconfigures a dual-stack ptp link + routes with ADD/DEL", ver), func() {
conf := fmt.Sprintf(`{
"cniVersion": "%s",
"name": "mynet",
@ -381,6 +381,11 @@ var _ = Describe("ptp Operations", func() {
[{ "subnet": "10.1.2.0/24"}],
[{ "subnet": "2001:db8:1::0/66"}]
],
"routes": [
{ "dst": "0.0.0.0/0" },
{ "dst": "192.168.0.0/16" },
{ "dst": "1.2.3.4/32" }
],
"dataDir": "%s"
}
}`, ver, dataDir)