From 249866e3d1e11dc72eaa1305f4bb479ded92ef38 Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Tue, 9 Jul 2024 13:58:20 +0200
Subject: reorganized file structure

Moved c files into src/.
Corrected VERSION file.
Removed BUILD and FILES.
---
 src/socket_tcp.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 src/socket_tcp.c

(limited to 'src/socket_tcp.c')

diff --git a/src/socket_tcp.c b/src/socket_tcp.c
new file mode 100644
index 0000000..1ff050e
--- /dev/null
+++ b/src/socket_tcp.c
@@ -0,0 +1,63 @@
+#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_tcp.c
+	@author djb, fefe, feh
+	@source ucspi-tcp6
+	@brief setup TCP stream socket
+*/
+
+int socket_tcp4(void)
+{
+  int s;
+
+  s = socket(AF_INET,SOCK_STREAM,0);
+  if (s != -1) 
+    if (ndelay_on(s) == -1) { close(s); return -1; }
+
+  return s;
+}
+
+int socket_tcp6(void)
+{
+  int s;
+
+  s = socket(AF_INET6,SOCK_STREAM,0);
+  if (s != -1) 
+    if (ndelay_on(s) == -1) { close(s); return -1; }
+
+  return s;
+}
+
+int socket_tcp(void)
+{
+  int s;
+
+  s = socket(AF_INET6,SOCK_STREAM,0);
+  if (s == -1) 
+    if (errno == EINVAL || errno == EAFNOSUPPORT || errno == EPROTO || errno == EPROTONOSUPPORT) 
+       s = socket(AF_INET,SOCK_STREAM,0);
+
+  if (s != -1) 
+    if (ndelay_on(s) == -1) { close(s); return -1; }
+
+  return s;
+}
+
+int socket_tcpnodelay(int s)
+{
+  int opt = 1;
+  return setsockopt(s,IPPROTO_TCP,1,&opt,sizeof(opt)); /* 1 == TCP_NODELAY */
+}
-- 
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