From b732a73bc773789894466b0e5320b2f1fe42c7e9 Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Fri, 1 Jun 2012 18:58:45 -0700
Subject: original, as downloaded from
 http://www.qmail.org/netqmail-1.06.tar.gz

---
 timeoutconn.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 timeoutconn.c

(limited to 'timeoutconn.c')

diff --git a/timeoutconn.c b/timeoutconn.c
new file mode 100644
index 0000000..33a16d9
--- /dev/null
+++ b/timeoutconn.c
@@ -0,0 +1,59 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include "ndelay.h"
+#include "select.h"
+#include "error.h"
+#include "readwrite.h"
+#include "ip.h"
+#include "byte.h"
+#include "timeoutconn.h"
+
+int timeoutconn(s,ip,port,timeout)
+int s;
+struct ip_address *ip;
+unsigned int port;
+int timeout;
+{
+  char ch;
+  struct sockaddr_in sin;
+  char *x;
+  fd_set wfds;
+  struct timeval tv;
+ 
+  byte_zero(&sin,sizeof(sin));
+  byte_copy(&sin.sin_addr,4,ip);
+  x = (char *) &sin.sin_port;
+  x[1] = port; port >>= 8; x[0] = port;
+  sin.sin_family = AF_INET;
+ 
+  if (ndelay_on(s) == -1) return -1;
+ 
+  /* XXX: could bind s */
+ 
+  if (connect(s,(struct sockaddr *) &sin,sizeof(sin)) == 0) {
+    ndelay_off(s);
+    return 0;
+  }
+  if ((errno != error_inprogress) && (errno != error_wouldblock)) return -1;
+ 
+  FD_ZERO(&wfds);
+  FD_SET(s,&wfds);
+  tv.tv_sec = timeout; tv.tv_usec = 0;
+ 
+  if (select(s + 1,(fd_set *) 0,&wfds,(fd_set *) 0,&tv) == -1) return -1;
+  if (FD_ISSET(s,&wfds)) {
+    int dummy;
+    dummy = sizeof(sin);
+    if (getpeername(s,(struct sockaddr *) &sin,&dummy) == -1) {
+      read(s,&ch,1);
+      return -1;
+    }
+    ndelay_off(s);
+    return 0;
+  }
+ 
+  errno = error_timeout; /* note that connect attempt is continuing */
+  return -1;
+}
-- 
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