1 files changed, 71 insertions, 0 deletions
diff --git a/pith/osdep/canonicl.c b/pith/osdep/canonicl.c
new file mode 100644
index 00000000..09791148
--- /dev/null
+++ b/pith/osdep/canonicl.c
@@ -0,0 +1,71 @@
+#if !defined(lint) && !defined(DOS)
+static char rcsid[] = "$Id: canonicl.c 764 2007-10-23 23:44:49Z hubert@u.washington.edu $";
+#endif
+
+/*
+ * ========================================================================
+ * Copyright 2006 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * ========================================================================
+ */
+
+#include "../../c-client/mail.h"
+extern unsigned char *lcase(unsigned char *);
+
+#ifdef _WINDOWS
+/* wingdi.h uses ERROR (!) and we aren't using the c-client ERROR so... */
+#undef ERROR
+#endif
+
+#include <system.h>
+
+#include "canonicl.h"
+
+
+/*----------------------------------------------------------------------
+       Return canonical form of host name ala c-client (UNIX version).
+
+   Args: host      -- The host name
+
+ Result: Canonical form, or input argument (worst case)
+
+ You can call it twice without worrying about copying
+ the results, but not more than twice.
+ ----*/
+char *
+canonical_name(char *host)
+{
+    struct hostent *hent;
+    char tmp[MAILTMPLEN];
+    static int  whichbuf = 0;
+    static char buf[2][NETMAXHOST+1];
+    char       *b;
+
+    whichbuf = (whichbuf + 1) % 2;
+    b = buf[whichbuf];
+
+                                /* domain literal is easy */
+    if (host[0] == '[' && host[(strlen (host))-1] == ']')
+      strncpy(b, host, NETMAXHOST);
+    else{
+	strncpy(tmp, host, sizeof(tmp)-1);
+	tmp[sizeof(tmp)-1] = '\0';
+
+	hent = gethostbyname((char *) lcase((unsigned char *) tmp));
+	if(hent && hent->h_name)
+	  strncpy(b, hent->h_name, NETMAXHOST);
+	else
+	  strncpy(b, host, NETMAXHOST);
+    }
+
+    b[NETMAXHOST] = '\0';
+    return(b);
+}
+
+