Added a function simple_udp_sendto_port() for sending a UDP packet to a specified port.

core/net/simple-udp.c

@@ -113,6 +113,34 @@ simple_udp_sendto(struct simple_udp_connection *c,
   return 0;
 }
 /*---------------------------------------------------------------------------*/
+/**
+ * \brief      Send a UDP packet to a specified IP address and UDP port
+ * \param c    A pointer to a struct simple_udp_connection
+ * \param data A pointer to the data to be sent
+ * \param datalen The length of the data
+ * \param to   The IP address of the receiver
+ * \param port   The UDP port of the receiver, in host byte order
+ *
+ *             This function sends a UDP packet to a specified IP
+ *             address and UDP port. The packet will be sent with the
+ *             UDP ports that were specified when the connection wa
+ *             registered with simple_udp_register().
+ *
+ * \sa simple_udp_sendto()
+ */
+int
+simple_udp_sendto_port(struct simple_udp_connection *c,
+		       const void *data, uint16_t datalen,
+		       const uip_ipaddr_t *to,
+		       uint16_t port)
+{
+  if(c->udp_conn != NULL) {
+    uip_udp_packet_sendto(c->udp_conn, data, datalen,
+                          to, UIP_HTONS(port));
+  }
+  return 0;
+}
+/*---------------------------------------------------------------------------*/
 /**
  * \brief      Register a UDP connection
  * \param c    A pointer to a struct simple_udp_connection

core/net/simple-udp.h

@@ -86,6 +86,10 @@ int simple_udp_sendto(struct simple_udp_connection *c,
                       const void *data, uint16_t datalen,
                       const uip_ipaddr_t *to);
 
+int simple_udp_sendto_port(struct simple_udp_connection *c,
+			   const void *data, uint16_t datalen,
+			   const uip_ipaddr_t *to, uint16_t to_port);
+
 void simple_udp_init(void);
 
 #endif /* SIMPLE_UDP_H */