server/: Introduce accessor functions for reading and writing port numbers.

[tripe] / server / servutil.c

diff --git a/server/servutil.c b/server/servutil.c
index 70776dd..b6fbf5b 100644 (file)
--- a/server/servutil.c
+++ b/server/servutil.c
@@ -160,4 +160,30 @@ socklen_t addrsz(const addr *a)
   }
 }
 
+/* --- @getport@, @setport@ --- *
+ *
+ * Arguments:  @addr *a@ = a network address
+ *             @unsigned port@ = port number to set
+ *
+ * Returns:    ---
+ *
+ * Use:                Retrieves or sets the port number in an address structure.
+ */
+
+unsigned getport(addr *a)
+{
+  switch (a->sa.sa_family) {
+    case AF_INET: return (ntohs(a->sin.sin_port)); break;
+    default: abort();
+  }
+}
+
+void setport(addr *a, unsigned port)
+{
+  switch (a->sa.sa_family) {
+    case AF_INET: a->sin.sin_port = htons(port); break;
+    default: abort();
+  }
+}
+
 /*----- That's all, folks -------------------------------------------------*/