Changeset 197 for trunk/src/sh_tools.c

Timestamp:

Nov 21, 2008, 10:33:04 PM (16 years ago)

Author:

katerina

Message:

Rewrite of code for conditionals in configuration file, supports more tests now (ticket #129).

File:

• trunk/src/sh_tools.c (modified) (1 diff)

trunk/src/sh_tools.c

@@ -122 +122 @@
 
 #endif
+
+/* --- check for an interface ---
+ */
+int sh_tools_iface_is_present(char *str)
+{
+  struct sockaddr_in sin;
+  int sd;
+
+  memset(&sin, '\0', sizeof(sin));
+  sin.sin_family = AF_INET;
+  if (inet_aton(str, &(sin.sin_addr)))
+    {
+      sin.sin_port = htons(2543);
+
+      if (-1 == (sd = socket(AF_INET, SOCK_STREAM, 0)))
+        {
+          return 0;
+        }
+
+      if (-1 == bind(sd, (struct sockaddr *)&sin, sizeof(sin)))
+        {
+          int retval = 0;
+
+          /* bind() fails for access reasons, iface exists
+           */
+          if (errno == EACCES || errno == EADDRINUSE)
+            retval = 1;
+          close (sd);
+          return retval;
+        }
+
+      /* bind() succeeds, iface exists
+       */
+      close(sd);
+      return 1;
+    }
+  return 0;
+}
 
 /* --- recode all \blah escapes to '=XX' format, and also code all