github.com/EagleQL/Xray-core@v1.4.3/common/log/dns.go (about)

     1  package log
     2  
     3  import (
     4  	"net"
     5  	"strings"
     6  	"time"
     7  )
     8  
     9  type DNSLog struct {
    10  	Server  string
    11  	Domain  string
    12  	Result  []net.IP
    13  	Status  dnsStatus
    14  	Elapsed time.Duration
    15  	Error   error
    16  }
    17  
    18  func (l *DNSLog) String() string {
    19  	builder := &strings.Builder{}
    20  
    21  	// Server got answer: domain -> [ip1, ip2] 23ms
    22  	builder.WriteString(l.Server)
    23  	builder.WriteString(" ")
    24  	builder.WriteString(string(l.Status))
    25  	builder.WriteString(" ")
    26  	builder.WriteString(l.Domain)
    27  	builder.WriteString(" -> [")
    28  	builder.WriteString(joinNetIP(l.Result))
    29  	builder.WriteString("]")
    30  
    31  	if l.Elapsed > 0 {
    32  		builder.WriteString(" ")
    33  		builder.WriteString(l.Elapsed.String())
    34  	}
    35  	if l.Error != nil {
    36  		builder.WriteString(" <")
    37  		builder.WriteString(l.Error.Error())
    38  		builder.WriteString(">")
    39  	}
    40  	return builder.String()
    41  }
    42  
    43  type dnsStatus string
    44  
    45  var (
    46  	DNSQueried  = dnsStatus("got answer:")
    47  	DNSCacheHit = dnsStatus("cache HIT:")
    48  )
    49  
    50  func joinNetIP(ips []net.IP) string {
    51  	if len(ips) == 0 {
    52  		return ""
    53  	}
    54  	sips := make([]string, 0, len(ips))
    55  	for _, ip := range ips {
    56  		sips = append(sips, ip.String())
    57  	}
    58  	return strings.Join(sips, ", ")
    59  }