From 96cf8dffe4f7b0b910f790066ae622dc429eb522 Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Tue, 9 Jul 2024 13:02:45 +0200
Subject: initial commit of version 23

---
 socket_udp.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 socket_udp.c

(limited to 'socket_udp.c')

diff --git a/socket_udp.c b/socket_udp.c
new file mode 100644
index 0000000..743cdf1
--- /dev/null
+++ b/socket_udp.c
@@ -0,0 +1,57 @@
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include "close.h"         /* better use unistd.h ? */
+#include "ndelay.h"
+#include "socket_if.h"
+#include "error.h"
+
+#ifndef EAFNOSUPPORT
+#define EAFNOSUPPORT EINVAL
+#endif
+
+/**
+	@file socket_udp.c
+	@author djb, fefe, feh
+	@source ucspi-tcp6
+	@brief setup a UDP message socket
+*/
+
+int socket_udp6(void)
+{
+  int s;
+
+  s = socket(AF_INET6,SOCK_DGRAM,0);
+  if (s != -1)
+   if (ndelay_on(s) == -1) { close(s); return -1; }
+
+  return s;
+} 
+
+int socket_udp4(void)
+{
+  int s;
+
+  s = socket(AF_INET,SOCK_DGRAM,0);
+  if (s != -1)
+   if (ndelay_on(s) == -1) { close(s); return -1; }
+
+  return s;
+} 
+
+int socket_udp(void)
+{
+  int s;
+
+  s = socket(AF_INET6,SOCK_DGRAM,0);
+  if (s == -1) 
+    if (errno == EINVAL || errno == EAFNOSUPPORT || errno == EPROTO || errno == EPROTONOSUPPORT)
+      s = socket(AF_INET,SOCK_DGRAM,0);
+
+  if (s != -1)
+   if (ndelay_on(s) == -1) { close(s); return -1; }
+
+  return s;
+}
-- 
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