updated uip uaodv radio driver
This commit is contained in:
fros4943
parent
598f4e94cd
commit
3768b44804
2 changed files with 188 additions and 217 deletions
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: init-net-uip-uaodv.c,v 1.2 2007/05/21 14:52:15 fros4943 Exp $
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* $Id: init-net-uip-uaodv.c,v 1.3 2007/07/17 23:02:22 fros4943 Exp $
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*/
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#include "contiki.h"
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@ -49,6 +49,7 @@ init_net(void)
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{
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uip_init();
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uip_fw_init();
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tcpip_set_forwarding(1);
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process_start(&tcpip_process, NULL);
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process_start(&uip_fw_process, NULL);
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: radio-uip-uaodv.c,v 1.3 2007/07/16 07:40:55 fros4943 Exp $
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* @(#)$Id: radio-uip-uaodv.c,v 1.4 2007/07/17 23:02:21 fros4943 Exp $
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*/
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#include "radio-uip-uaodv.h"
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@ -37,60 +37,65 @@
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#include "net/uaodv.h"
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#include "net/uaodv-rt.h"
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#include "net/uaodv-def.h"
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#include "lib/crc16.h"
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#include "list.h"
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#include <string.h>
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#include <stdio.h>
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#define UNICAST_ACKED 1 /* Define to acknowledge unicast packets */
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#define BAD_REPLY_ON_NO_ROUTE 0 /* TODO */
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#define uip_udp_sender() (&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->srcipaddr)
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#define HEADER_ID_LENGTH strlen(uniqueFwdHeader)
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#define HEADER_NEXT_FWD HEADER_ID_LENGTH
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#define HEADER_LENGTH HEADER_NEXT_FWD + 4
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/*
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{ // DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT
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uip_ipaddr_t *DEST = &packet->finaldest;
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printf("%d.%d.%d.%d: XXXXX radio_uip_uaodv.c bad dest due to no ack %d.%d.%d.%d\n",
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uip_ipaddr1(&uip_hostaddr), uip_ipaddr2(&uip_hostaddr), uip_ipaddr3(&uip_hostaddr), uip_ipaddr4(&uip_hostaddr),
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uip_ipaddr1(DEST), uip_ipaddr2(DEST), uip_ipaddr3(DEST), uip_ipaddr4(DEST));
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fflush(stdout);
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} // DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT - DEBUG OUTPUT
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*/
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#if UNICAST_ACKED
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/* Packet buffer size and retransmission settings */
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#define MAX_BUFFERED_PACKETS 10
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#define MAX_RETRANSMISSIONS_RREP 16
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#define MAX_RETRANSMISSIONS_UNICAST 16
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#include "lib/crc16.h"
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#include "list.h"
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/* Forward packet (header) */
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#define FWD_ID "fWd:"
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#define FWD_ID_LENGTH 4
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#define FWD_NEXT_IP FWD_ID_LENGTH
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#define FWD_PACKET_LENGTH (FWD_NEXT_IP + 4)
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/* Acknowledgement packet */
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#define ACK_ID "aCk"
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#define ACK_ID_LENGTH 3
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#define ACK_CRC ACK_ID_LENGTH
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#define ACK_PACKET_LENGTH (ACK_ID_LENGTH + 2)
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enum {
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EVENT_SEND_ACK
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};
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struct bufferedPacket {
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struct bufferedPacket *next;
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struct buf_packet {
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struct buf_packet *next;
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u8_t data[UIP_BUFSIZE];
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int len;
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u8_t resends;
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u8_t acked;
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u8_t want_ack;
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u16_t crc;
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uip_ipaddr_t finaldest;
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struct etimer etimer;
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};
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LIST(bufferedPackets);
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MEMB(bufferedPacketsMEMB, struct bufferedPacket, 10);
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LIST(buf_packet_list);
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MEMB(buf_packet_mem, struct buf_packet, MAX_BUFFERED_PACKETS);
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PROCESS(radio_uip_ack_process, "radio uIP uAODV ack process");
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#endif
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PROCESS(radio_uip_process, "radio uIP uAODV process");
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static const char* uniqueFwdHeader = "fWd:";
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#if UNICAST_ACKED
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static const char* uniqueAckHeader = "aCk";
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#define ACK_HEADER_LENGTH 3
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#define ACK_LENGTH ACK_HEADER_LENGTH + 2
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#endif
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static const struct radio_driver *radio;
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static struct uaodv_rt_entry *route;
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/*---------------------------------------------------------------------------*/
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#if UNICAST_ACKED
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int radio_uip_wait_for_ack(u8_t *buf, int len, uip_ipaddr_t *dest);
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int radio_uip_buffer_outgoing_packet(u8_t *buf, int len, uip_ipaddr_t *dest, int max_sends);
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int radio_uip_is_ack(u8_t *buf, int len);
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#endif
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int radio_uip_uaodv_add_header(u8_t *buf, int len, uip_ipaddr_t *addr);
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int radio_uip_uaodv_remove_header(u8_t *buf, int len);
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void radio_uip_uaodv_change_header(u8_t *buf, int len, uip_ipaddr_t *addr);
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@ -102,61 +107,61 @@ int radio_uip_uaodv_dest_is_me(u8_t *buf, int len);
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int radio_uip_uaodv_dest_port(u8_t *buf, int len);
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/*---------------------------------------------------------------------------*/
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#if UNICAST_ACKED
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PROCESS_THREAD(radio_uip_ack_process, ev, data)
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/* Main process - handles (re)transmissions and acks */
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PROCESS_THREAD(radio_uip_process, ev, data)
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{
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struct bufferedPacket *bufPacket;
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struct buf_packet *packet;
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PROCESS_BEGIN();
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while(1) {
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PROCESS_YIELD();
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/* We should either send an ack, or resend a packet */
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if(ev == EVENT_SEND_ACK) {
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char ackPacket[ACK_LENGTH];
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/* Prepare and send ack */
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memcpy(ackPacket, uniqueAckHeader, ACK_HEADER_LENGTH);
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memcpy(&ackPacket[ACK_HEADER_LENGTH], &data, 2);
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radio->send(ackPacket, ACK_LENGTH);
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/* Prepare and send ack for given 16-bit CRC */
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char ackPacket[ACK_PACKET_LENGTH];
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memcpy(ackPacket, ACK_ID, ACK_ID_LENGTH);
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memcpy(&ackPacket[ACK_CRC], &data, 2);
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radio->send(ackPacket, ACK_PACKET_LENGTH);
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} else if(ev == PROCESS_EVENT_TIMER) {
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/* Locate which packet acknowledgement timed out */
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for(bufPacket = list_head(bufferedPackets);
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bufPacket != NULL;
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bufPacket = bufPacket->next) {
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if (etimer_expired(&bufPacket->etimer)) {
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for(packet = list_head(buf_packet_list);
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packet != NULL;
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packet = packet->next) {
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if (etimer_expired(&packet->etimer)) {
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if (bufPacket->acked) {
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/* This packet was already acknowledged! */
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list_remove(bufferedPackets, bufPacket);
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memb_free(&bufferedPacketsMEMB, bufPacket);
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} else if (bufPacket->resends < 3) {
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/* Resend packet a number of times */
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bufPacket->resends++;
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if (packet->acked) {
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/* Already acked packet, remove silently */
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list_remove(buf_packet_list, packet);
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memb_free(&buf_packet_mem, packet);
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} else if (packet->resends > 0) {
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/* Resend packet */
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packet->resends--;
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etimer_set(&packet->etimer, CLOCK_SECOND * 1);
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radio->send(packet->data, packet->len);
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/* TODO Compress packets? */
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radio->send(bufPacket->data, bufPacket->len);
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etimer_restart(&bufPacket->etimer);
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} else {
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/* Too many resends, give up */
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/* TODO: Report non-delivered packet with bad dest? */
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uaodv_bad_dest(&bufPacket->finaldest);
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list_remove(bufferedPackets, bufPacket);
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memb_free(&bufferedPacketsMEMB, bufPacket);
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/* Packet was resent maximum number of times */
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/* If an ack was expected, flag destination to bad */
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if (packet->want_ack && !uip_ipaddr_cmp(&packet->finaldest, &uip_broadcast_addr)) {
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uaodv_bad_dest(&packet->finaldest);
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}
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list_remove(buf_packet_list, packet);
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memb_free(&buf_packet_mem, packet);
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}
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}
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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#endif
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static void
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receiver(const struct radio_driver *d)
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{
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@ -165,39 +170,14 @@ receiver(const struct radio_driver *d)
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return;
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}
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#if UNICAST_ACKED
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/* Detect and parse acknowledgements */
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/* Detect and handle acknowledgements */
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if (radio_uip_is_ack(&uip_buf[UIP_LLH_LEN], uip_len)) {
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radio_uip_handle_ack(&uip_buf[UIP_LLH_LEN], uip_len);
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return;
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}
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#endif
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#if UNICAST_ACKED
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/* uAODV RREP and RERR messages should be acked as soon as possible */
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if (radio_uip_uaodv_dest_is_me(&uip_buf[UIP_LLH_LEN], uip_len) &&
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radio_uip_uaodv_dest_port(&uip_buf[UIP_LLH_LEN], uip_len) == HTONS(UAODV_UDPPORT)) {
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struct uaodv_msg *m = (struct uaodv_msg *)&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
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if (m->type == UAODV_RREP_TYPE || m->type == UAODV_RERR_TYPE) {
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u16_t crc;
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crc = radio_uip_calc_crc(&uip_buf[UIP_LLH_LEN], uip_len);
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process_post(&radio_uip_ack_process, EVENT_SEND_ACK, crc);
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}
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}
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#endif
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/* If no uAODV header, receive as usual (compatibility) */
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/* If no uAODV header, receive as usual */
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if (!radio_uip_uaodv_header_exists(&uip_buf[UIP_LLH_LEN], uip_len)) {
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//uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);
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tcpip_input();
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return;
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}
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/* If broadcast packet, strip header and receive without forwarding */
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if (radio_uip_uaodv_fwd_is_broadcast(&uip_buf[UIP_LLH_LEN], uip_len)) {
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/* Strip header and receive */
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uip_len = radio_uip_uaodv_remove_header(&uip_buf[UIP_LLH_LEN], uip_len);
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//uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);
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tcpip_input();
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return;
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}
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@ -207,111 +187,83 @@ receiver(const struct radio_driver *d)
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return;
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}
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/* If we are final destination, strip header and receive */
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if (radio_uip_uaodv_dest_is_me(&uip_buf[UIP_LLH_LEN + HEADER_LENGTH], uip_len)) {
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#if UNICAST_ACKED
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{
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/* Unicast packets should be acked as soon as possible */
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u16_t crc;
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crc = radio_uip_calc_crc(&uip_buf[UIP_LLH_LEN], uip_len);
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process_post(&radio_uip_ack_process, EVENT_SEND_ACK, crc);
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}
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#endif
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uip_len = radio_uip_uaodv_remove_header(&uip_buf[UIP_LLH_LEN], uip_len);
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//uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);
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tcpip_input();
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return;
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{
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/* Send ack as soon as possible */
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u16_t crc;
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crc = radio_uip_calc_crc(&uip_buf[UIP_LLH_LEN], uip_len);
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process_post(&radio_uip_process, EVENT_SEND_ACK, crc);
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}
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/* Find new uAODV forwarder and forward packet */
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/* TODO TTL? Hop-count? */
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/* TODO Assuming uAODV already knows a path */
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route = uaodv_rt_lookup((&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN + HEADER_LENGTH])->destipaddr));
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if (route != NULL) {
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/* Strip header and receive packet */
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uip_len = radio_uip_uaodv_remove_header(&uip_buf[UIP_LLH_LEN], uip_len);
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tcpip_input();
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#if UNICAST_ACKED
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{
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/* Ack last forwarder as soon as possible */
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u16_t crc;
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crc = radio_uip_calc_crc(&uip_buf[UIP_LLH_LEN], uip_len);
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process_post(&radio_uip_ack_process, EVENT_SEND_ACK, crc);
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}
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#endif
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radio_uip_uaodv_change_header(&uip_buf[UIP_LLH_LEN], uip_len, &route->nexthop);
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#if UNICAST_ACKED
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/* Wait for ack from next forwarded */
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radio_uip_wait_for_ack(&uip_buf[UIP_LLH_LEN], uip_len, &route->dest);
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#endif
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d->send(&uip_buf[UIP_LLH_LEN], uip_len);
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#if BAD_REPLY_ON_NO_ROUTE
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} else {
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NOT IMPLEMENTED
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#endif
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}
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return;
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}
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/*---------------------------------------------------------------------------*/
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u8_t
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radio_uip_uaodv_send(void)
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{
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/* uAODV RREQ messages should be sent as usual */
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if (radio_uip_uaodv_dest_port(&uip_buf[UIP_LLH_LEN], uip_len) == HTONS(UAODV_UDPPORT)) {
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struct uaodv_msg *m = (struct uaodv_msg *)&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN];
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if (m->type == UAODV_RREQ_TYPE) {
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//uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);
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return radio->send(&uip_buf[UIP_LLH_LEN], uip_len);
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struct uaodv_rt_entry *route;
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/* Transmit broadcast packets without header */
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if (radio_uip_uaodv_is_broadcast(&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr)) {
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return radio_uip_buffer_outgoing_packet(&uip_buf[UIP_LLH_LEN], uip_len, &uip_broadcast_addr, 1);
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}
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/* Transmit uAODV packets with headers but without using route table */
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if (((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->proto == UIP_PROTO_UDP
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&& radio_uip_uaodv_dest_port(&uip_buf[UIP_LLH_LEN], uip_len) == HTONS(UAODV_UDPPORT)) {
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uip_ipaddr_t nexthop;
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memcpy(&nexthop, &((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr, 4);
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uip_len = radio_uip_uaodv_add_header(
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&uip_buf[UIP_LLH_LEN],
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uip_len,
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&nexthop
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);
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/* Buffer packet for persistent transmission */
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return radio_uip_buffer_outgoing_packet(
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&uip_buf[UIP_LLH_LEN],
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uip_len,
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&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN + FWD_PACKET_LENGTH])->destipaddr,
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MAX_RETRANSMISSIONS_RREP);
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}
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/* Fetch already prepared uAODV route */
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route = uaodv_rt_lookup_any((&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr));
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if (route == NULL || route->is_bad) {
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/* If we are forwarding, notify origin of this bad route */
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if (tcpip_is_forwarding) {
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uaodv_bad_dest((&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr));
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}
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#if UNICAST_ACKED
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/* uAODV RREP and RERR messages should be acked */
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radio_uip_wait_for_ack(&uip_buf[UIP_LLH_LEN], uip_len, &((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr);
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#endif
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//uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);
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return radio->send(&uip_buf[UIP_LLH_LEN], uip_len);
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return UIP_FW_DROPPED;
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}
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if (radio_uip_uaodv_is_broadcast(uip_udp_sender())) {
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//uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);
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/* We can use the broadcast address immediately */
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uip_len = radio_uip_uaodv_add_header(&uip_buf[UIP_LLH_LEN], uip_len, uip_udp_sender()); /* TODO Correct? */
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} else {
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//uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);
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/* Fetch uAODV route (must be prepared!) */
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route = uaodv_rt_lookup((&((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr));
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if (route == NULL) return UIP_FW_NOROUTE;
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uip_len = radio_uip_uaodv_add_header(&uip_buf[UIP_LLH_LEN], uip_len, &route->nexthop); /* TODO Correct? */
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#if UNICAST_ACKED
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/* We expect to get an ack for this unicast packet */
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radio_uip_wait_for_ack(&uip_buf[UIP_LLH_LEN], uip_len, &route->dest);
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#endif
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}
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return radio->send(&uip_buf[UIP_LLH_LEN], uip_len);
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/* Add header and buffer packet for persistent transmission */
|
||||
uip_len = radio_uip_uaodv_add_header(&uip_buf[UIP_LLH_LEN], uip_len, &route->nexthop); /* TODO Correct? */
|
||||
return radio_uip_buffer_outgoing_packet(
|
||||
&uip_buf[UIP_LLH_LEN],
|
||||
uip_len,
|
||||
&route->dest,
|
||||
MAX_RETRANSMISSIONS_UNICAST);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
radio_uip_uaodv_init(const struct radio_driver *d)
|
||||
{
|
||||
#if UNICAST_ACKED
|
||||
memb_init(&bufferedPacketsMEMB);
|
||||
list_init(bufferedPackets);
|
||||
process_start(&radio_uip_ack_process, NULL);
|
||||
#endif
|
||||
/* Prepare buffers and start main process */
|
||||
memb_init(&buf_packet_mem);
|
||||
list_init(buf_packet_list);
|
||||
process_start(&radio_uip_process, NULL);
|
||||
|
||||
radio = d;
|
||||
radio->set_receive_function(receiver);
|
||||
radio->on();
|
||||
}
|
||||
#if UNICAST_ACKED
|
||||
/*---------------------------------------------------------------------------*/
|
||||
u16_t
|
||||
radio_uip_calc_crc(u8_t *buf, int len)
|
||||
|
|
@ -319,6 +271,7 @@ radio_uip_calc_crc(u8_t *buf, int len)
|
|||
u16_t crcacc = 0xffff;
|
||||
int counter;
|
||||
|
||||
/* TODO Not effective */
|
||||
for (counter = 0; counter < len; counter++) {
|
||||
crcacc = crc16_add(buf[counter], crcacc);
|
||||
}
|
||||
|
|
@ -326,111 +279,128 @@ radio_uip_calc_crc(u8_t *buf, int len)
|
|||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_wait_for_ack(u8_t *buf, int len, uip_ipaddr_t *dest)
|
||||
radio_uip_buffer_outgoing_packet(u8_t *buf, int len, uip_ipaddr_t *dest, int max_sends)
|
||||
{
|
||||
struct bufferedPacket *bufPacket;
|
||||
struct buf_packet *packet;
|
||||
|
||||
/* Allocate storage memory */
|
||||
bufPacket = (struct bufferedPacket *)memb_alloc(&bufferedPacketsMEMB);
|
||||
if (bufPacket == NULL) {
|
||||
return 1;
|
||||
u16_t crc;
|
||||
|
||||
/* Calculate packet's unique CRC */
|
||||
crc = radio_uip_calc_crc(&uip_buf[UIP_LLH_LEN], uip_len);
|
||||
|
||||
/* Check if this packet is already being transmitted */
|
||||
for(packet = list_head(buf_packet_list);
|
||||
packet != NULL;
|
||||
packet = packet->next) {
|
||||
if (packet->crc == crc) {
|
||||
return UIP_FW_DROPPED;
|
||||
}
|
||||
}
|
||||
|
||||
/* Store packet specific data and set timer */
|
||||
memcpy(bufPacket->data, buf, len);
|
||||
bufPacket->len = len;
|
||||
bufPacket->resends = 0;
|
||||
bufPacket->acked = 0;
|
||||
memcpy(&bufPacket->finaldest, dest, 4);
|
||||
bufPacket->crc = radio_uip_calc_crc(&uip_buf[UIP_LLH_LEN], uip_len);
|
||||
PROCESS_CONTEXT_BEGIN(&radio_uip_ack_process);
|
||||
etimer_set(&bufPacket->etimer, CLOCK_SECOND * 1);
|
||||
PROCESS_CONTEXT_END(&radio_uip_ack_process);
|
||||
/* Allocate storage memory */
|
||||
packet = (struct buf_packet *)memb_alloc(&buf_packet_mem);
|
||||
if (packet == NULL) {
|
||||
return UIP_FW_DROPPED;
|
||||
}
|
||||
|
||||
/* Add to list for later reference */
|
||||
list_add(bufferedPackets, bufPacket);
|
||||
/* Prepare packet buffer */
|
||||
memcpy(packet->data, buf, len);
|
||||
packet->len = len;
|
||||
packet->resends = max_sends;
|
||||
packet->acked = 0;
|
||||
if (packet->resends > 1)
|
||||
packet->want_ack = 1;
|
||||
else
|
||||
packet->want_ack = 0;
|
||||
memcpy(&packet->finaldest, dest, 4);
|
||||
packet->crc = crc;
|
||||
|
||||
return 0;
|
||||
/* Set first transmission to as soon as possible */
|
||||
PROCESS_CONTEXT_BEGIN(&radio_uip_process);
|
||||
etimer_set(&packet->etimer, 0);
|
||||
PROCESS_CONTEXT_END(&radio_uip_process);
|
||||
|
||||
/* Add to buffered packets list */
|
||||
list_add(buf_packet_list, packet);
|
||||
|
||||
return UIP_FW_OK;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_is_ack(u8_t *buf, int len)
|
||||
{
|
||||
struct bufferedPacket *bufPacket;
|
||||
|
||||
if (uip_len != ACK_LENGTH)
|
||||
if (uip_len != ACK_PACKET_LENGTH)
|
||||
return 0;
|
||||
|
||||
return strncmp(buf, uniqueAckHeader, ACK_HEADER_LENGTH) == 0;
|
||||
return strncmp(buf, ACK_ID, ACK_ID_LENGTH) == 0;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_handle_ack(u8_t *buf, int len)
|
||||
{
|
||||
struct bufferedPacket *bufPacket;
|
||||
struct buf_packet *packet;
|
||||
u16_t ackCRC;
|
||||
|
||||
memcpy(&ackCRC, &buf[ACK_HEADER_LENGTH], 2);
|
||||
memcpy(&ackCRC, &buf[ACK_CRC], 2);
|
||||
|
||||
/* Locate which packet was acknowledged */
|
||||
for(bufPacket = list_head(bufferedPackets);
|
||||
bufPacket != NULL;
|
||||
bufPacket = bufPacket->next) {
|
||||
if (bufPacket->crc == ackCRC) {
|
||||
for(packet = list_head(buf_packet_list);
|
||||
packet != NULL;
|
||||
packet = packet->next) {
|
||||
if (packet->crc == ackCRC) {
|
||||
/* Signal packet has been acknowledged */
|
||||
bufPacket->acked = 1;
|
||||
packet->acked = 1;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_uaodv_add_header(u8_t *buf, int len, uip_ipaddr_t *addr)
|
||||
{
|
||||
memcpy(&buf[HEADER_LENGTH], buf, len);
|
||||
memcpy(buf, uniqueFwdHeader, HEADER_ID_LENGTH);
|
||||
memcpy(&buf[HEADER_NEXT_FWD], (char*)addr, 4);
|
||||
return HEADER_LENGTH + len;
|
||||
memcpy(&buf[FWD_PACKET_LENGTH], buf, len);
|
||||
memcpy(buf, FWD_ID, FWD_ID_LENGTH);
|
||||
memcpy(&buf[FWD_NEXT_IP], (char*)addr, 4);
|
||||
return FWD_PACKET_LENGTH + len;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_uaodv_remove_header(u8_t *buf, int len)
|
||||
{
|
||||
memcpy(buf, &buf[HEADER_LENGTH], len);
|
||||
return HEADER_LENGTH + len;
|
||||
return len - HEADER_LENGTH;
|
||||
memcpy(buf, &buf[FWD_PACKET_LENGTH], len);
|
||||
return len - FWD_PACKET_LENGTH; /* TODO XXX Why doesn't this work!? */
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
radio_uip_uaodv_change_header(u8_t *buf, int len, uip_ipaddr_t *addr)
|
||||
{
|
||||
memcpy(&buf[HEADER_NEXT_FWD], addr, 4);
|
||||
memcpy(&buf[FWD_NEXT_IP], addr, 4);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_uaodv_header_exists(u8_t *buf, int len)
|
||||
{
|
||||
return !memcmp(buf, uniqueFwdHeader, HEADER_ID_LENGTH);
|
||||
return !memcmp(buf, FWD_ID, FWD_ID_LENGTH);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_uaodv_is_broadcast(uip_ipaddr_t *addr)
|
||||
{
|
||||
return ((u8_t*)addr)[3] == 255; /* TODO Only comparing with the last */
|
||||
return uip_ipaddr_cmp(addr, &uip_broadcast_addr);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_uaodv_fwd_is_broadcast(u8_t *buf, int len)
|
||||
{
|
||||
return radio_uip_uaodv_is_broadcast((uip_ipaddr_t*) &buf[HEADER_NEXT_FWD]);
|
||||
return radio_uip_uaodv_is_broadcast((uip_ipaddr_t*) &buf[FWD_NEXT_IP]);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
radio_uip_uaodv_fwd_is_me(u8_t *buf, int len)
|
||||
{
|
||||
return !memcmp(&buf[HEADER_NEXT_FWD], &uip_hostaddr, 4);
|
||||
return !memcmp(&buf[FWD_NEXT_IP], &uip_hostaddr, 4);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
|
|
|
|||
Loading…
Reference in a new issue