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package packet
import (
"fmt"
"strconv"
"strings"
)
func CommunityString(v uint32) string {
e1 := v >> 16
e2 := v - e1<<16
return fmt.Sprintf("(%d,%d)", e1, e2)
}
func ParseCommunityString(s string) (uint32, error) {
s = strings.Trim(s, "()")
t := strings.Split(s, ",")
if len(t) != 2 {
return 0, fmt.Errorf("can not parse community %s", s)
}
v, err := strconv.ParseUint(t[0], 10, 16)
if err != nil {
return 0, err
}
e1 := uint32(v)
v, err = strconv.ParseUint(t[1], 10, 16)
if err != nil {
return 0, err
}
e2 := uint16(v)
return e1<<16 + uint32(e2), nil
}