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xds/googledirectpath: Check if ipv6 address is non empty #6959

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Merged
merged 1 commit into from
Feb 2, 2024
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xds/googledirectpath: Check if ipv6 address is non empty #6959

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7 changes: 6 additions & 1 deletion xds/googledirectpath/utils.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ import (
"io"
"net/http"
"net/url"
"strings"
"sync"
"time"
)
Expand Down Expand Up @@ -85,11 +86,15 @@ var (
// Defined as var to be overridden in tests.
var getIPv6Capable = func(timeout time.Duration) bool {
ipv6CapableOnce.Do(func() {
_, err := getFromMetadata(timeout, ipv6URL)
addr, err := getFromMetadata(timeout, ipv6URL)
if err != nil {
logger.Warningf("could not discover ipv6 capability: %v", err)
return
}
if trimmedAddr := strings.TrimSpace(string(addr)); trimmedAddr == "" {
logger.Warningf("metadata server returned empty ipv6 address")
return
}
ipv6Capable = true
})
return ipv6Capable
Expand Down