[VOL-4290] Voltha go library updates for gRPC migration
Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/github.com/jcmturner/dnsutils/v2/LICENSE b/vendor/github.com/jcmturner/dnsutils/v2/LICENSE
new file mode 100644
index 0000000..261eeb9
--- /dev/null
+++ b/vendor/github.com/jcmturner/dnsutils/v2/LICENSE
@@ -0,0 +1,201 @@
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diff --git a/vendor/github.com/jcmturner/dnsutils/v2/go.mod b/vendor/github.com/jcmturner/dnsutils/v2/go.mod
new file mode 100644
index 0000000..f75ac6d
--- /dev/null
+++ b/vendor/github.com/jcmturner/dnsutils/v2/go.mod
@@ -0,0 +1,5 @@
+module github.com/jcmturner/dnsutils/v2
+
+go 1.13
+
+require github.com/stretchr/testify v1.4.0
diff --git a/vendor/github.com/jcmturner/dnsutils/v2/go.sum b/vendor/github.com/jcmturner/dnsutils/v2/go.sum
new file mode 100644
index 0000000..e863f51
--- /dev/null
+++ b/vendor/github.com/jcmturner/dnsutils/v2/go.sum
@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/vendor/github.com/jcmturner/dnsutils/v2/srv.go b/vendor/github.com/jcmturner/dnsutils/v2/srv.go
new file mode 100644
index 0000000..15ea912
--- /dev/null
+++ b/vendor/github.com/jcmturner/dnsutils/v2/srv.go
@@ -0,0 +1,95 @@
+package dnsutils
+
+import (
+ "math/rand"
+ "net"
+ "sort"
+)
+
+// OrderedSRV returns a count of the results and a map keyed on the order they should be used.
+// This based on the records' priority and randomised selection based on their relative weighting.
+// The function's inputs are the same as those for net.LookupSRV
+// To use in the correct order:
+//
+// count, orderedSRV, err := OrderedSRV(service, proto, name)
+// i := 1
+// for i <= count {
+// srv := orderedSRV[i]
+// // Do something such as dial this SRV. If fails move on the the next or break if it succeeds.
+// i += 1
+// }
+func OrderedSRV(service, proto, name string) (int, map[int]*net.SRV, error) {
+ _, addrs, err := net.LookupSRV(service, proto, name)
+ if err != nil {
+ return 0, make(map[int]*net.SRV), err
+ }
+ index, osrv := orderSRV(addrs)
+ return index, osrv, nil
+}
+
+func orderSRV(addrs []*net.SRV) (int, map[int]*net.SRV) {
+ // Initialise the ordered map
+ var o int
+ osrv := make(map[int]*net.SRV)
+
+ prioMap := make(map[int][]*net.SRV, 0)
+ for _, srv := range addrs {
+ prioMap[int(srv.Priority)] = append(prioMap[int(srv.Priority)], srv)
+ }
+
+ priorities := make([]int, 0)
+ for p := range prioMap {
+ priorities = append(priorities, p)
+ }
+
+ var count int
+ sort.Ints(priorities)
+ for _, p := range priorities {
+ tos := weightedOrder(prioMap[p])
+ for i, s := range tos {
+ count += 1
+ osrv[o+i] = s
+ }
+ o += len(tos)
+ }
+ return count, osrv
+}
+
+func weightedOrder(srvs []*net.SRV) map[int]*net.SRV {
+ // Get the total weight
+ var tw int
+ for _, s := range srvs {
+ tw += int(s.Weight)
+ }
+
+ // Initialise the ordered map
+ o := 1
+ osrv := make(map[int]*net.SRV)
+
+ // Whilst there are still entries to be ordered
+ l := len(srvs)
+ for l > 0 {
+ i := rand.Intn(l)
+ s := srvs[i]
+ var rw int
+ if tw > 0 {
+ // Greater the weight the more likely this will be zero or less
+ rw = rand.Intn(tw) - int(s.Weight)
+ }
+ if rw <= 0 {
+ // Put entry in position
+ osrv[o] = s
+ if len(srvs) > 1 {
+ // Remove the entry from the source slice by swapping with the last entry and truncating
+ srvs[len(srvs)-1], srvs[i] = srvs[i], srvs[len(srvs)-1]
+ srvs = srvs[:len(srvs)-1]
+ l = len(srvs)
+ } else {
+ l = 0
+ }
+ o += 1
+ tw = tw - int(s.Weight)
+ }
+ }
+ return osrv
+}