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Added logic for announcing that a network has a gateway to the outside world (with the function uip_over_mesh_make_announced_gateway()). The announced gateway sends a trickle message to the network, containing the address of the gateway. Other nodes will then know that packets destined to the outside world should go through the gateway node.
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@ -28,7 +28,7 @@
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*
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*
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* This file is part of the Contiki operating system.
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* This file is part of the Contiki operating system.
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*
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*
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* $Id: uip-over-mesh.c,v 1.9 2008/06/26 11:19:40 adamdunkels Exp $
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* $Id: uip-over-mesh.c,v 1.10 2008/11/09 12:20:56 adamdunkels Exp $
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*/
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*/
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/**
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/**
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@ -42,16 +42,26 @@
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#include "net/hc.h"
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#include "net/hc.h"
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#include "net/uip-fw.h"
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#include "net/uip-fw.h"
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#include "net/uip-over-mesh.h"
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#include "net/rime/route-discovery.h"
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#include "net/rime/route-discovery.h"
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#include "net/rime/route.h"
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#include "net/rime/route.h"
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#include "net/rime/trickle.h"
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#define ROUTE_TIMEOUT CLOCK_SECOND * 4
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#define ROUTE_TIMEOUT CLOCK_SECOND * 4
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static struct queuebuf *queued_packet;
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static struct queuebuf *queued_packet;
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static rimeaddr_t queued_receiver;
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static rimeaddr_t queued_receiver;
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/* Connection for route discovery: */
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static struct route_discovery_conn route_discovery;
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static struct route_discovery_conn route_discovery;
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/* Connection for sending data packets to the next hop node: */
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static struct unicast_conn dataconn;
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static struct unicast_conn dataconn;
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/* Connection for sending gateway announcement message to the entire
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network: */
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static struct trickle_conn gateway_announce_conn;
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#define DEBUG 0
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#define DEBUG 0
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#if DEBUG
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#if DEBUG
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#include <stdio.h>
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#include <stdio.h>
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@ -121,6 +131,45 @@ timedout(struct route_discovery_conn *c)
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static const struct unicast_callbacks data_callbacks = { recv_data };
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static const struct unicast_callbacks data_callbacks = { recv_data };
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static const struct route_discovery_callbacks rdc = { new_route, timedout };
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static const struct route_discovery_callbacks rdc = { new_route, timedout };
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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struct gateway_msg {
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rimeaddr_t gateway;
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};
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static uint8_t is_gateway;
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static void
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gateway_announce_recv(struct trickle_conn *c)
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{
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struct gateway_msg *msg;
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msg = rimebuf_dataptr();
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PRINTF("%d.%d: gateway message: %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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msg->gateway.u8[0], msg->gateway.u8[1]);
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if(!is_gateway) {
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uip_over_mesh_set_gateway(&msg->gateway);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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uip_over_mesh_make_announced_gateway(void)
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{
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struct gateway_msg msg;
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/* Make this node the gateway node, unless it already is the
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gateway. */
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if(!is_gateway) {
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PRINTF("%d.%d: making myself the gateway\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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uip_over_mesh_set_gateway(&rimeaddr_node_addr);
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rimeaddr_copy(&(msg.gateway), &rimeaddr_node_addr);
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rimebuf_copyfrom(&msg, sizeof(struct gateway_msg));
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trickle_send(&gateway_announce_conn);
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is_gateway = 1;
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}
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}
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const static struct trickle_callbacks trickle_call = {gateway_announce_recv};
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/*---------------------------------------------------------------------------*/
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void
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void
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uip_over_mesh_init(u16_t channels)
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uip_over_mesh_init(u16_t channels)
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{
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{
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@ -133,6 +182,9 @@ uip_over_mesh_init(u16_t channels)
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unicast_open(&dataconn, channels, &data_callbacks);
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unicast_open(&dataconn, channels, &data_callbacks);
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route_discovery_open(&route_discovery, CLOCK_SECOND / 4,
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route_discovery_open(&route_discovery, CLOCK_SECOND / 4,
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channels + 1, &rdc);
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channels + 1, &rdc);
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trickle_open(&gateway_announce_conn, CLOCK_SECOND * 4, channels + 3,
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&trickle_call);
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/* tcpip_set_forwarding(1);*/
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/* tcpip_set_forwarding(1);*/
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}
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}
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@ -28,7 +28,7 @@
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*
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*
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* This file is part of the Contiki operating system.
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* This file is part of the Contiki operating system.
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*
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*
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* $Id: uip-over-mesh.h,v 1.2 2008/02/03 20:56:07 adamdunkels Exp $
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* $Id: uip-over-mesh.h,v 1.3 2008/11/09 12:20:56 adamdunkels Exp $
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*/
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*/
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/**
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/**
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@ -52,4 +52,6 @@ void uip_over_mesh_set_gateway_netif(struct uip_fw_netif *netif);
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void uip_over_mesh_set_gateway(rimeaddr_t *gw);
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void uip_over_mesh_set_gateway(rimeaddr_t *gw);
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void uip_over_mesh_set_net(uip_ipaddr_t *addr, uip_ipaddr_t *mask);
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void uip_over_mesh_set_net(uip_ipaddr_t *addr, uip_ipaddr_t *mask);
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void uip_over_mesh_make_announced_gateway(void);
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#endif /* __UIP-OVER-MESH_H__ */
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#endif /* __UIP-OVER-MESH_H__ */
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