add socket_udp4b and socket_udp6b

socket.h

@@ -14,9 +14,11 @@ extern "C" {
 int socket_tcp4(void);
 int socket_tcp4b(void);
 int socket_udp4(void);
+int socket_udp4b(void);
 int socket_tcp6(void);
 int socket_tcp6b(void);
 int socket_udp6(void);
+int socket_udp6b(void);
 
 int socket_sctp4(void);
 int socket_sctp4b(void);

socket/socket_udp4.c

@@ -9,11 +9,16 @@
 #include "socket.h"
 #include "ndelay.h"
 
-int socket_udp4(void) {
+int socket_udp4b(void) {
   int s;
   __winsock_init();
   s = winsock2errno(socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP));
-  if (s == -1) return -1;
-  if (ndelay_on(s) == -1) { close(s); return -1; }
+  return s;
+}
+
+int socket_udp4(void) {
+  int s;
+  s=socket_udp4b();
+  if (s!=-1 && ndelay_on(s) == -1) { close(s); return -1; }
   return s;
 }

socket/socket_udp6.c

@@ -20,7 +20,7 @@
 #define EPROTONOSUPPORT EAFNOSUPPORT
 #endif
 
-int socket_udp6(void)
+int socket_udp6b(void)
 {
 #ifdef LIBC_HAS_IP6
   int s;
@@ -43,9 +43,14 @@ compat:
     winsock2errno(setsockopt(s,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&zero,sizeof(zero)));
   }
 #endif
-  if (ndelay_on(s) == -1) { close(s); return -1; }
   return s;
 #else
-  return socket_udp();
+  return socket_udp4b();
 #endif
 }
+
+int socket_udp6(void) {
+  int s=socket_udp6b();
+  if (s!=-1 && ndelay_on(s) == -1) { close(s); return -1; }
+  return s;
+}

t.c

@@ -68,10 +68,13 @@ static int ret1(const char* s,void* foo) {
 }
 
 int main(int argc,char* argv[]) {
+  int s=socket_udp6();
+#if 0
   char buf[100];
   assert(fmt_varint(buf,1)==1 && buf[0]==1);
   fmt_varint(buf,300);
   assert(fmt_varint(buf,300)==2 && buf[0]==(char)0xac && buf[1]==0x02);
+#endif
 #if 0
   const char buf[]="fnord\n";
   buffer_puts(buffer_1,buf);