/
utils.go
65 lines (53 loc) · 1.03 KB
/
utils.go
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package swarm
import (
"fmt"
"net"
log "github.com/sirupsen/logrus"
)
func mapNodesToAddresses(n []*NodeInfo) []string {
var s []string
for i := range n {
s = append(s, fmt.Sprintf("%v:%d", n[i].Addr, n[i].Port))
}
return s
}
func getSelf(nodes []*NodeInfo) *NodeInfo {
addrs, err := net.InterfaceAddrs()
if err != nil {
log.Fatalf("SWARM: Failed to get addr: %v", err)
}
for _, ni := range nodes {
for _, addr := range addrs {
ip, _, err := net.ParseCIDR(addr.String())
if err != nil {
log.Errorf("SWARM: could not parse cidr: %v", err)
continue
}
if ip.Equal(ni.Addr) {
return ni
}
}
}
return nil
}
func reverse(b [][]byte) [][]byte {
for i := range b[:len(b)/2] {
b[i], b[len(b)-1-i] = b[len(b)-1-i], b[i]
}
return b
}
func takeMaxLatest(b [][]byte, overhead, max int) [][]byte {
var (
bb [][]byte
size int
)
for i := range b {
bli := b[len(b)-i-1]
if size+len(bli)+overhead > max {
break
}
bb = append(bb, bli)
size += len(bli) + overhead
}
return reverse(bb)
}