added getPortNum

r1142 | ffr | 2006-10-13 15:44:20 +1000 (Fri, 13 Oct 2006) | 2 lines

site_ansto/anstoutil.c

@@ -1,4 +1,6 @@
 #include <stdlib.h>
+#include <netdb.h>
+#include <netinet/in.h>
 #include <sics.h>
 #include "anstoutil.h"
 
@@ -23,3 +25,23 @@ char *getParam(SConnection *pCon, Tcl_Interp *pTcl, char *params, char *parName,
   }
   return pPtr;
 } 
+
+/** \brief Lookup named port in /etc/services
+ * \param *pCon (r) connection object.
+ * \param *portName (r) name of port to look up
+ * \return 
+ * - port number on success
+ * - 0 on failure
+ */
+int getPortNum(SConnection *pCon, char *portName) {
+  struct servent *sp=NULL;
+  char pError[ERRLEN];
+
+  sp = getservbyname(portName, "tcp");
+  if (sp == NULL) {
+    snprintf(pError, ERRLEN,"ERROR: '%s' service not found", portName);
+    SCWrite(pCon,pError, eError);
+    return 0;
+  }
+  return ntohs(sp->s_port);
+}