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aodv.c
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aodv.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "libconfig.h"
/*
*
*
*
*
*
*/
#include "aodv.h"
#define dbg_printf(f, a...) \
do { \
{ fprintf(stderr, "%s(%d): " f, __func__, __LINE__, ## a); } \
} while (0)
//Packet tx/rx
static int AODV_SendPacket(tAODV *pAodv, tAODVPacket *pPkt);
static int AODV_SendXXMessage(tAODV *pAodv, tAODVPacket *pPkt);
static int AODV_SendUDPMessage(tAODV *pAodv, tAODVPacket *pPkt);
/*
*
*/
static void AODV_TxCtrlThreadProc(void *pArg);
static void AODV_RxCtrlThreadProc(void *pArg);
static void AODV_TxDataThreadProc(void *pArg);
static void AODV_UDPServerThreadProc(void *pArg);
//Routing control
static void AODV_HandleMessage(tAODV *pAodv, tAODVPacket *pPkt);
static void AODV_InitRREQ(tAODV *pAodv, tAODVPacket *pPkt, uint16_t DestAddr);
static void AODV_HandleRREQ(tAODV *pAodv, tAODVPacket *pPkt);
static void AODV_InitRREP(tAODV *pAodv, tAODVPacket *pPkt, uint16_t SrcAddr, uint16_t DestAddr);
static void AODV_HandleRREP(tAODV *pAodv, tAODVPacket *pPkt);
static void AODV_InitRERR(tAODV *pAodv, tAODVPacket *pPkt, uint16_t DestAddr, uint16_t SrcAddr);
static void AODV_HandleRERR(tAODV *pAodv, tAODVPacket *pPkt);
static void AODV_InitHELLO(tAODV *pAodv, tAODVPacket *pPkt);
static void AODV_HandleHELLO(tAODV *pAodv, tAODVPacket *pPkt);
static void AODV_InitDATA(tAODV *pAodv, tAODVPacket *pPkt, uint16_t Addr, uint16_t DataLen, char *data);
static void AODV_HandleDATA(tAODV *pAodv, tAODVPacket *pPkt);
//Utils
static int AODV_LoadConfig(tAODV *pAodv, char *pConfigFileName);
static int AODV_UDPSendSocketInit(tAODV *pAodv);
static void AODV_PrintRouteTable(tAODV *pAodv);
static void AODV_PrintPacket(tAODVPacket *pPkt);
static void AODV_SwapPacketEndianness(tAODVPacket *pPkt);
static bool AODV_IsAddressValid(uint16_t Addr);
static bool AODV_HasRoute(tAODV *pAodv, uint16_t Addr);
static void AODV_CheckRouteExpiry(tAODV *pAodv);
static uint8_t AODV_DeviceToNetLink(uint8_t DeviceType);
static uint64_t AODV_CurrentTimeMillis();
static uint16_t bswap16(uint16_t b);
int AODV_Open(tAODV **ppAodv, pthread_attr_t *pAttr, char *pConfigFileName)
{
int Res = -ENOSYS;
tAODV* pAodv = (tAODV *) malloc(sizeof(tAODV));
if (pAodv == NULL)
{
Res = -ENOMEM;
goto Error;
}
memset(pAodv, 0, sizeof(tAODV));
Res = AODV_LoadConfig(pAodv, pConfigFileName);
if (Res != 0)
{
dbg_printf("Error loading config\n");
goto Error;
}
/*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
//initialize route entries to false;
int i;
for (i = 0; i < AODV_MAX_NETWORK_SIZE; i++)
{
pAodv->RouteTable[i].Valid = false;
}
//initalize queue items to null
for (i = 0; i < AODV_TX_QUEUE_SIZE; i++)
{
pAodv->TxQueue[i] = NULL;
}
Res = AODV_UDPSendSocketInit(pAodv);
if (Res < 0)
{
dbg_printf("Error initializing send socket\n");
goto Error;
}
//initialize mutexes
pthread_mutexattr_init(&pAodv->RouteTableMutexAttr);
pthread_mutexattr_settype(&pAodv->RouteTableMutexAttr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutexattr_init(&pAodv->TxMutexAttr);
pthread_mutexattr_init(&pAodv->DataMutexAttr);
Res = pthread_mutex_init(&pAodv->RouteTableMutex, &pAodv->RouteTableMutexAttr);
if (Res != 0)
{
dbg_printf("Error initializing Tx Mutex\n");
goto Error;
}
Res = pthread_mutex_init(&pAodv->TxMutex, &pAodv->TxMutexAttr);
if (Res != 0)
{
dbg_printf("Error initializing Tx Mutex\n");
goto Error;
}
Res = pthread_mutex_init(&pAodv->DataMutex, &pAodv->DataMutexAttr);
if (Res != 0)
{
dbg_printf("Error initializing Data Mutex\n");
goto Error;
}
pAodv->TxCtrlThreadAttr = *pAttr;
pAodv->RxCtrlThreadAttr = *pAttr;
pAodv->TxDataThreadAttr = *pAttr;
pAodv->UDPServerThreadAttr = *pAttr;
pAodv->TxCtrlThreadState |= AODV_THREAD_STATE_INIT;
Res = pthread_create(&pAodv->TxCtrlThread,
&pAodv->TxCtrlThreadAttr,
(void *) AODV_TxCtrlThreadProc,
pAodv);
if (Res != 0)
{
dbg_printf("Error initializing Tx Ctrl Thread\n");
pAodv->TxCtrlThreadState = AODV_THREAD_STATE_NONE;
goto Error;
}
pAodv->RxCtrlThreadState |= AODV_THREAD_STATE_INIT;
Res = pthread_create(&pAodv->RxCtrlThread,
&pAodv->RxCtrlThreadAttr,
(void *) AODV_RxCtrlThreadProc,
pAodv);
if (Res != 0)
{
dbg_printf("Error initializing Rx Ctrl Thread\n");
pAodv->RxCtrlThreadState = AODV_THREAD_STATE_NONE;
goto Error;
}
pAodv->TxDataThreadState |= AODV_THREAD_STATE_INIT;
Res = pthread_create(&pAodv->TxDataThread,
&pAodv->TxDataThreadAttr,
(void *) AODV_TxDataThreadProc,
pAodv);
if (Res != 0)
{
dbg_printf("Error initializing Tx Data Thread\n");
pAodv->TxDataThreadState = AODV_THREAD_STATE_NONE;
goto Error;
}
pAodv->UDPServerThreadState |= AODV_THREAD_STATE_INIT;
Res = pthread_create(&pAodv->UDPServerThread,
&pAodv->UDPServerThreadAttr,
(void *) AODV_UDPServerThreadProc,
pAodv);
if (Res != 0)
{
dbg_printf("Error initializing UDP Server Thread\n");
pAodv->UDPServerThreadState = AODV_THREAD_STATE_NONE;
goto Error;
}
*ppAodv = pAodv;
Res = 0;
goto Success;
Error:
dbg_printf("AODV Open Failed\n");
AODV_Close(pAodv);
Success:
return Res;
}
int AODV_Close(tAODV* pAodv)
{
int Res = -ENOSYS;
if (pAodv == NULL)
{
Res = -EINVAL;
goto Error;
}
pAodv->TxCtrlThreadState |= AODV_THREAD_STATE_STOP;
pAodv->RxCtrlThreadState |= AODV_THREAD_STATE_STOP;
pAodv->TxDataThreadState |= AODV_THREAD_STATE_STOP;
pAodv->UDPServerThreadState |= AODV_THREAD_STATE_STOP;
if (pAodv->TxCtrlThreadState & AODV_THREAD_STATE_INIT)
{
pthread_join(pAodv->TxCtrlThread, NULL);
}
if (pAodv->RxCtrlThreadState & AODV_THREAD_STATE_INIT)
{
pthread_join(pAodv->RxCtrlThread, NULL);
}
if (pAodv->TxDataThreadState & AODV_THREAD_STATE_INIT)
{
pthread_join(pAodv->TxDataThread, NULL);
}
if (pAodv->UDPServerThreadState & AODV_THREAD_STATE_INIT)
{
pthread_join(pAodv->UDPServerThread, NULL);
}
dbg_printf("AODV Threads stopped\n");
pthread_mutex_destroy(&pAodv->TxMutex);
pthread_mutex_destroy(&pAodv->DataMutex);
pthread_mutexattr_destroy(&pAodv->TxMutexAttr);
pthread_mutexattr_destroy(&pAodv->DataMutexAttr);
/*
*
*
*
*/
//free tx queue
tAODVTxData *pTxData;
int i;
for (i = 0; i < AODV_TX_QUEUE_SIZE; i++)
{
pTxData = pAodv->TxQueue[i];
if (pTxData != NULL)
{
if (pTxData->pData != NULL)
{
free(pTxData->pData);
}
free(pTxData);
pAodv->TxQueue[i] = NULL;
}
}
Error:
free(pAodv);
return Res;
}
int AODV_SendMessage(tAODV *pAodv, tAODVTxData *pTxData)
{
int Res = -ENOSYS;
if (pTxData == NULL)
{
dbg_printf("pTxData was NULL\n");
Res = -EINVAL;
goto Error;
}
uint16_t Address = pTxData->Address;
if (!AODV_IsAddressValid(Address) || Address == pAodv->Self.Addr)
{
dbg_printf("Invalid Address for AODV Send\n");
Res = -EINVAL;
goto Error;
}
//if no route to address, send RREQ
if (!AODV_HasRoute(pAodv, Address))
{
pAodv->Self.BcastSeqNum++;
tAODVPacket *pMsg = (tAODVPacket *) calloc(1, AODV_PACKET_SIZE);
AODV_InitRREQ(pAodv, pMsg, Address);
Res = AODV_SendPacket(pAodv, pMsg);
if (Res != 0)
{
pAodv->Stats.RREQTxFail++;
dbg_printf("AODV Send RREQ Failed, Src=%#x, Dest=%x\n", pAodv->Self.Addr, Address);
}
else
{
pAodv->Stats.RREQTxOkay++;
}
free(pMsg);
}
//add TxData to first empty spot in queue
bool Added = false;
pthread_mutex_lock(&pAodv->DataMutex);
for (int i = 0; i < AODV_TX_QUEUE_SIZE; ++i)
{
if (pAodv->TxQueue[i] == NULL)
{
tAODVTxData *pTxDataQ = (tAODVTxData *) malloc(sizeof(tAODVTxData));
pTxDataQ->Address = Address;
pTxDataQ->DataLen = pTxData->DataLen;
pTxDataQ->pData = strndup(pTxData->pData, pTxData->DataLen);
pTxDataQ->Lifetime = AODV_CurrentTimeMillis() + AODV_QUEUE_DATA_LIFETIME_MS;
pAodv->TxQueue[i] = pTxDataQ;
Added = true;
break;
}
}
pthread_mutex_unlock(&pAodv->DataMutex);
if (!Added)
{
dbg_printf("Data Queue is full");
Res = -EAGAIN;
goto Error;
}
Res = 0;
Error:
return Res;
}
/*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
void AODV_PrintStats(tAODV *pAodv)
{
dbg_printf("AODV HELLO: Tx (Okay %d, Fail %d) | Rx (Okay %d)\n"
"AODV DATA : Tx (Okay %d, Fail %d) | Rx (Okay %d)\n"
"AODV RREQ : Tx (Okay %d, Fail %d) | Rx (Okay %d)\n"
"AODV RREP : Tx (Okay %d, Fail %d) | Rx (Okay %d)\n"
"AODV RERR : Tx (Okay %d, Fail %d) | Rx (Okay %d)\n"
"AODV UDP : Tx (Okay %d, Fail %d) | Rx (Okay %d)\n",
pAodv->Stats.HelloTxOkay, pAodv->Stats.HelloTxFail, pAodv->Stats.HelloRxOkay,
pAodv->Stats.DATATxOkay, pAodv->Stats.DATATxFail, pAodv->Stats.DATARxOkay,
pAodv->Stats.RREQTxOkay, pAodv->Stats.RREQTxFail, pAodv->Stats.RREQRxOkay,
pAodv->Stats.RREPTxOkay, pAodv->Stats.RREPTxFail, pAodv->Stats.RREPRxOkay,
pAodv->Stats.RERRTxOkay, pAodv->Stats.RERRTxFail, pAodv->Stats.RERRRxOkay,
pAodv->Stats.UDPTxOkay, pAodv->Stats.UDPTxFail, pAodv->Stats.UDPRxOkay);
AODV_PrintRouteTable(pAodv);
}
static void AODV_TxCtrlThreadProc(void *pArg)
{
int Res = -ENOSYS;
struct timespec Time;
tAODVPacket *pHelloPkt;
tAODV *pAodv;
dbg_printf("Started AODV Tx Ctrl thread\n");
pAodv = (tAODV *) pArg;
pHelloPkt = (tAODVPacket *) calloc(1, AODV_PACKET_HDR_SIZE + AODV_PACKET_DATA_SIZE);
pAodv->TxCtrlThreadState |= AODV_THREAD_STATE_RUN;
clock_gettime(CLOCK_MONOTONIC, &Time);
//Thread loop, send a hello packet to neighbors every hello interval
while ((pAodv->TxCtrlThreadState & AODV_THREAD_STATE_STOP) == 0)
{
AODV_InitHELLO(pAodv, pHelloPkt);
Res = AODV_SendPacket(pAodv, pHelloPkt);
if (Res == 0)
{
pAodv->Stats.HelloTxOkay++;
}
else
{
pAodv->Stats.HelloTxFail++;
}
/*
*
*/
}
free(pHelloPkt);
(void) pthread_exit(NULL);
}
static void AODV_RxCtrlThreadProc(void *pArg)
{
tAODV* pAodv;
struct timespec Time;
/*
*
*/
dbg_printf("Started AODV Rx Ctrl thread\n");
pAodv = (tAODV *) pArg;
pAodv->RxCtrlThreadState |= AODV_THREAD_STATE_RUN;
clock_gettime(CLOCK_MONOTONIC, &Time);
/*
*
*
*
*
*
*
*
*/
while ((pAodv->RxCtrlThreadState & AODV_THREAD_STATE_STOP) == 0)
{
// check for route expirations
AODV_CheckRouteExpiry(pAodv);
/*
*
*/
}
/*
*
*/
Error:
(void) pthread_exit(NULL);
}
static void AODV_TxDataThreadProc(void *pArg)
{
int Res = -ENOSYS;
struct timespec Time;
tAODV *pAodv;
tAODVPacket *pMsg;
dbg_printf("Started AODV Tx Data thread\n");
pAodv = (tAODV *) pArg;
pMsg = (tAODVPacket *) calloc(1, AODV_PACKET_SIZE);
pAodv->TxDataThreadState |= AODV_THREAD_STATE_RUN;
clock_gettime(CLOCK_MONOTONIC, &Time);
//thread loop, wait for data in queue and then send it
while ((pAodv->TxDataThreadState & AODV_THREAD_STATE_STOP) == 0)
{
pthread_mutex_lock(&pAodv->DataMutex);
uint64_t TimeMillis = AODV_CurrentTimeMillis();
for (int i = 0; i < AODV_TX_QUEUE_SIZE; ++i)
{
tAODVTxData *pTxData = pAodv->TxQueue[i];
if (pTxData != NULL)
{
bool SentData = false;
uint16_t Address = pTxData->Address;
//if a route exists send the data
if (AODV_HasRoute(pAodv, Address))
{
uint16_t LenSending = 0;
char *DataStart = pTxData->pData;
char *DataEnd = DataStart + pTxData->DataLen;
while (DataStart < DataEnd)
{
LenSending = (DataEnd - DataStart) >= AODV_PACKET_DATA_SIZE
? AODV_PACKET_DATA_SIZE : (DataEnd - DataStart);
memset(pMsg, 0, sizeof(tAODVPacket));
AODV_InitDATA(pAodv, pMsg, Address, LenSending, DataStart);
Res = AODV_SendPacket(pAodv, pMsg);
if (Res != 0)
{
pAodv->Stats.DATATxFail++;
dbg_printf("AODV Send Data Failed, Src=%#x, Dest=%#x, Len=%d\n",
pAodv->Self.Addr, Address, LenSending);
}
else
{
pAodv->Stats.DATATxOkay++;
}
DataStart += LenSending;
}
SentData = true;
}
//remove expired data, route was never found
if (SentData || pTxData->Lifetime <= TimeMillis)
{
if (pTxData->pData != NULL)
{
free(pTxData->pData);
}
free(pTxData);
pAodv->TxQueue[i] = NULL;
}
}
}
pthread_mutex_unlock(&pAodv->DataMutex);
/*
*
*/
}
free(pMsg);
(void) pthread_exit(NULL);
}
static void AODV_UDPServerThreadProc(void *pArg)
{
int Res = -ENOSYS;
char buffer[AODV_UDP_BUFSIZE];
struct sockaddr_in ServerAddr, ClientAddr;
int sockfd;
tAODV *pAodv;
dbg_printf("Started AODV UDP Server thread\n");
pAodv = (tAODV *) pArg;
tAODVPacket *pPkt = calloc(1, sizeof(tAODVPacket));
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0)
{
dbg_printf("ERROR: socket open failed\n");
goto Error;
}
int ReuseAddr = 1;
Res = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &ReuseAddr, sizeof(int));
if (Res < 0)
{
dbg_printf("ERROR: set socket opt reuseaddr failed\n");
goto Error;
}
int BcastEnable=1;
Res = setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &BcastEnable, sizeof(int));
if (Res < 0) {
dbg_printf("ERROR: set socket opt broadcast failed\n");
goto Error;
}
memset(&ServerAddr, 0, sizeof(ServerAddr));
ServerAddr.sin_family = AF_INET;
ServerAddr.sin_addr.s_addr = htonl(INADDR_ANY);
ServerAddr.sin_port = htons(AODV_UDP_PORT);
Res = bind(sockfd, (struct sockaddr *) &ServerAddr, sizeof(struct sockaddr));
if (Res < 0)
{
dbg_printf("ERROR: socket bind failed\n");
goto Error;
}
dbg_printf("AODV UDP Server listening on port %d...\n", AODV_UDP_PORT);
pAodv->UDPServerThreadState |= AODV_THREAD_STATE_RUN;
while ((pAodv->UDPServerThreadState & AODV_THREAD_STATE_STOP) == 0)
{
int ClientSize = sizeof(ClientAddr);
memset(&ClientAddr, 0, ClientSize);
memset(buffer, 0, AODV_UDP_BUFSIZE);
Res = recvfrom(sockfd, buffer, AODV_UDP_BUFSIZE, 0,
(struct sockaddr *) &ClientAddr, (socklen_t *) &ClientSize);
if (Res < 0)
{
dbg_printf("ERROR: receive failed\n");
continue;
}
if (Res < AODV_PACKET_HDR_SIZE)
{
dbg_printf("ERROR: received packet with incorrect structure\n");
continue;
}
memset(pPkt, 0, sizeof(tAODVPacket));
memcpy(pPkt, buffer, Res);
//drop packets from same device type, as UDP is not preffered link
if (pPkt->Hdr.SendDevType == AODV_DEVICE_XX)
{
dbg_printf("Dropping packet from same device type\n");
continue;
}
if(pPkt->Hdr.NextAddr != pAodv->Self.Addr && pPkt->Hdr.NextAddr != AODV_BROADCAST_ADDR)
{
dbg_printf("Not intended packet recipient: %#x\n", pPkt->Hdr.NextAddr);
continue;
}
dbg_printf("AODV UDP Server received %d bytes from %s\n",
Res, inet_ntoa(ClientAddr.sin_addr));
pAodv->Stats.UDPRxOkay++;
//the endianness is swapped from Androids
if (pPkt->Hdr.SendDevType == AODV_DEVICE_AND)
{
AODV_SwapPacketEndianness(pPkt);
}
//print packet for debug
AODV_PrintPacket(pPkt);
AODV_HandleMessage(pAodv, pPkt);
}
Error:
close(sockfd);
free(pPkt);
(void) pthread_exit(NULL);
}
static int AODV_LoadConfig(tAODV *pAodv, char* pConfigFileName)
{
int Res = -ENOSYS;
config_t Config;
config_t *pConfig;
config_setting_t *pSetting;
int ConfigVal = 0;
pConfig = &Config;
config_init(pConfig);
pAodv->Self.Addr = AODV_CONFIG_VALUE_DEFAULT_ADDRESS;
pAodv->Self.BcastSeqNum = 0;
pAodv->Self.SeqNum = 0;
if (config_read_file(pConfig, pConfigFileName) != CONFIG_TRUE)
{
dbg_printf("Could not open %s\n", pConfigFileName);
Res = -EINVAL;
goto Error;
}
pSetting = config_lookup(pConfig, AODV_CONFIG_PATH_NAME);
if (pSetting == NULL)
{
dbg_printf("config_lookup(%s) failed\n", AODV_CONFIG_PATH_NAME);
Res = -EINVAL;
goto Error;
}
if (config_setting_lookup_int(pSetting,
AODV_CONFIG_VALUE_NAME_ADDRESS,
&ConfigVal))
{
pAodv->Self.Addr = (uint16_t) ConfigVal;
}
dbg_printf("AODV Node Addr set to %d\n", pAodv->Self.Addr);
config_destroy(pConfig);
Res = 0;
Error:
return Res;
}
static int AODV_SendXXMessage(tAODV *pAodv, tAODVPacket *pPkt)
{
/*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
}
static int AODV_SendPacket(tAODV *pAodv, tAODVPacket *pPkt)
{
int Res = -ENOSYS;
pPkt->Hdr.SendAddr = pAodv->Self.Addr;
pPkt->Hdr.SendDevType = AODV_DEVICE_XX;
switch(pPkt->Hdr.NetLinkType) {
case AODV_NETLINK_ALL: {
Res = AODV_SendXXMessage(pAodv, pPkt);
Res |= AODV_SendUDPMessage(pAodv, pPkt);
break;
}
case AODV_NETLINK_XX: {
Res = AODV_SendXXMessage(pAodv, pPkt);
break;
}
case AODV_NETLINK_UDP: {
Res = AODV_SendUDPMessage(pAodv, pPkt);
break;
}
default: {
dbg_printf("Dropping packet with unknown NetLinkType\n");
}
}
return Res;
}
/*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
static int AODV_UDPSendSocketInit(tAODV *pAodv)
{
int Res = -ENOSYS;
pAodv->SendSockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (pAodv->SendSockfd < 0) {
dbg_printf("ERROR: socket open failed\n");
goto Error;
}
int ReuseAddr = 1;
Res = setsockopt(pAodv->SendSockfd, SOL_SOCKET, SO_REUSEADDR, &ReuseAddr, sizeof(int));
if (Res < 0)
{
dbg_printf("ERROR: set socket opt reuseaddr failed\n");
goto Error;
}
int BcastEnable=1;
Res = setsockopt(pAodv->SendSockfd, SOL_SOCKET, SO_BROADCAST, &BcastEnable, sizeof(int));
if (Res < 0) {
dbg_printf("ERROR: set socket opt broadcast failed\n");
goto Error;
}
memset(&pAodv->SendSockAddr, 0, sizeof(struct sockaddr_in));
pAodv->SendSockAddr.sin_family = AF_INET;
//broadcast IP for wifi, make this configurable at some point
Res = inet_aton("192.168.10.255", &pAodv->SendSockAddr.sin_addr);
pAodv->SendSockAddr.sin_port = htons(AODV_UDP_PORT);
if (Res < 0) {
dbg_printf("ERROR: invalid socket address\n");
goto Error;
}
Res = bind(pAodv->SendSockfd, (struct sockaddr*) &pAodv->SendSockAddr, sizeof(struct sockaddr));
if (Res < 0)
{
dbg_printf("ERROR: socket bind failed\n");
goto Error;
}
Res = 0;
dbg_printf("Started UDP Sender Socket\n");
Error:
return Res;
}
static int AODV_SendUDPMessage(tAODV *pAodv, tAODVPacket *pPkt)
{
int Res = -ENOSYS;
char buffer[AODV_UDP_BUFSIZE];
memset(buffer, 0, AODV_UDP_BUFSIZE);
//copy message into buffer
//int StrLen = strlen(pStr);
int PacketSize = sizeof(tAODVPacketHdr) + pPkt->Hdr.Length;
//swap endianness for Androids
AODV_SwapPacketEndianness(pPkt);
memcpy(buffer, pPkt, PacketSize);
//memcpy(buffer, pStr, StrLen);
pthread_mutex_lock(&pAodv->TxMutex);
Res = sendto(pAodv->SendSockfd, buffer, PacketSize, 0,
(struct sockaddr*) &pAodv->SendSockAddr, sizeof(struct sockaddr));
pthread_mutex_unlock(&pAodv->TxMutex);
//Res = sendto(pAodv->SendSockfd, buffer, StrLen, 0,
//(struct sockaddr*) &pAodv->SendSockAddr, sizeof(struct sockaddr));
if (Res < 0) {
pAodv->Stats.UDPTxFail++;
dbg_printf("ERROR: send message failed: %d\n", errno);
goto Error;
}
dbg_printf("Sent AODV UDP Packet: %d bytes to %s\n",
Res, inet_ntoa(pAodv->SendSockAddr.sin_addr));
Res = 0;
pAodv->Stats.UDPTxOkay++;
Error:
return Res;
}
static void AODV_HandleMessage(tAODV *pAodv, tAODVPacket *pPkt)
{
switch (pPkt->Hdr.PacketType)
{
case AODV_PACKET_HELLO:
{
pAodv->Stats.HelloRxOkay++;
AODV_HandleHELLO(pAodv, pPkt);
break;
}
case AODV_PACKET_DATA:
{
pAodv->Stats.DATARxOkay++;
AODV_HandleDATA(pAodv, pPkt);
break;
}
case AODV_PACKET_RREQ:
{
pAodv->Stats.RREQRxOkay++;
AODV_HandleRREQ(pAodv, pPkt);
break;
}
case AODV_PACKET_RREP:
{
pAodv->Stats.RREPRxOkay++;
AODV_HandleRREP(pAodv, pPkt);
break;
}
case AODV_PACKET_RERR:
{
pAodv->Stats.RERRRxOkay++;
AODV_HandleRERR(pAodv, pPkt);
break;
}