WSA error messages reformat

logg/logg.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net"
 	"os"
+	"syscall"
 	"time"
 )
 
@@ -19,26 +20,39 @@ func lead(l string) string {
 	return ("[" + l + " " + timestamp() + "] ")
 }
 
+// Widnows WSA error messages are way too long to print
+// ex: An established connection was aborted by the software in your host machine.write tcp 127.0.0.1:8100->127.0.0.1:52466: wsasend: An established connection was aborted by the software in your host machine.
+func tryShortenWSAError(err interface{}) (ret string) {
+	defer recover()
+
+	ret = "not a network error"
+
+	e := err.(*net.OpError).Err.(*os.SyscallError).Err.(syscall.Errno)
+	if msg, ok := WSAErrno[int(e)]; ok {
+		ret = msg
+	} else {
+		// messages on linux are short enough
+		ret = fmt.Sprintf("C%d, %s", uintptr(e), e.Error())
+	}
+
+	return
+}
+
 func print(l string, params ...interface{}) {
 	l = lead(l)
 
 	for _, p := range params {
 		s := fmt.Sprintf("%+v", p)
-
-		if _, ok := p.(error); ok {
-			op, ok := p.(*net.OpError)
-			if ok {
-
-				l += fmt.Sprintf("src: %v, addr: %v, op: %s\n", op.Source, op.Addr, op.Op)
-				s = fmt.Sprintf("%s  %+v", lead("^"), op.Err)
-			}
-
-			if len(s) > 120 {
-				s = s[:120] + "..."
-			}
+		switch p.(type) {
+		case *net.OpError:
+			op := p.(*net.OpError)
+			l += fmt.Sprintf("%v -[%s]-> %v, %s", op.Source, op.Op, op.Addr, tryShortenWSAError(p))
+		case *net.DNSError:
+			op := p.(*net.DNSError)
+			l += fmt.Sprintf("lookup: %s, timeout: %v", op.Name, op.IsTimeout)
+		default:
+			l += (s)
 		}
-
-		l += (s)
 	}
 
 	fmt.Println(l)

logg/wsaerrno.go

@@ -0,0 +1,95 @@
+package logg
+
+// Refer to https://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx
+
+var WSAErrno = map[int]string{
+	10004: "Interrupted function call",
+	10009: "File handle is not valid",
+	10013: "Permission denied",
+	10014: "Bad address",
+	10022: "Invalid argument",
+	10024: "Too many open files",
+	10035: "Resource temporarily unavailable",
+	10036: "Operation now in progress",
+	10037: "Operation already in progress",
+	10038: "Socket operation on nonsocket",
+	10039: "Destination address required",
+	10040: "Message too long",
+	10041: "Protocol wrong type for socket",
+	10042: "Bad protocol option",
+	10043: "Protocol not supported",
+	10044: "Socket type not supported",
+	10045: "Operation not supported",
+	10046: "Protocol family not supported",
+	10047: "Address family not supported by protocol family",
+	10048: "Address already in use",
+	10049: "Cannot assign requested address",
+	10050: "Network is down",
+	10051: "Network is unreachable",
+	10052: "Network dropped connection on reset",
+	10053: "Software caused connection abort",
+	10054: "Connection reset by peer",
+	10055: "No buffer space available",
+	10056: "Socket is already connected",
+	10057: "Socket is not connected",
+	10058: "Cannot send after socket shutdown",
+	10059: "Too many references",
+	10060: "Connection timed out",
+	10061: "Connection refused",
+	10062: "Cannot translate name",
+	10063: "Name too long",
+	10064: "Host is down",
+	10065: "No route to host",
+	10066: "Directory not empty",
+	10067: "Too many processes",
+	10068: "User quota exceeded",
+	10069: "Disk quota exceeded",
+	10070: "Stale file handle reference",
+	10071: "Item is remote",
+	10091: "Network subsystem is unavailable",
+	10092: "Winsock.dll version out of range",
+	10093: "Successful WSAStartup not yet performed",
+	10101: "Graceful shutdown in progress",
+	10102: "No more results",
+	10103: "Call has been canceled",
+	10104: "Procedure call table is invalid",
+	10105: "Service provider is invalid",
+	10106: "Service provider failed to initialize",
+	10107: "System call failure",
+	10108: "Service not found",
+	10109: "Class type not found",
+	10110: "No more results",
+	10111: "Call was canceled",
+	10112: "Database query was refused",
+	11001: "Host not found",
+	11002: "Nonauthoritative host not found",
+	11003: "This is a nonrecoverable error",
+	11004: "Valid name, no data record of requested type",
+	11005: "QoS receivers",
+	11006: "QoS senders",
+	11007: "No QoS senders",
+	11008: "QoS no receivers",
+	11009: "QoS request confirmed",
+	11010: "QoS admission error",
+	11011: "QoS policy failure",
+	11012: "QoS bad style",
+	11013: "QoS bad object",
+	11014: "QoS traffic control error",
+	11015: "QoS generic error",
+	11016: "QoS service type error",
+	11017: "QoS flowspec error",
+	11018: "Invalid QoS provider buffer",
+	11019: "Invalid QoS filter style",
+	11020: "Invalid QoS filter type",
+	11021: "Incorrect QoS filter count",
+	11022: "Invalid QoS object length",
+	11023: "Incorrect QoS flow count",
+	11024: "Unrecognized QoS object",
+	11025: "Invalid QoS policy object",
+	11026: "Invalid QoS flow descriptor",
+	11027: "Invalid QoS provider-specific flowspec",
+	11028: "Invalid QoS provider-specific filterspec",
+	11029: "Invalid QoS shape discard mode object",
+	11030: "Invalid QoS shaping rate object",
+	11031: "Reserved policy QoS element type",
+}