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#include<stdio.h>
#include<string.h> //strlen
#include<sys/socket.h>
#include <net/if.h>
#include "com.h"
#include <unistd.h>
#include <sys/ioctl.h>
#include<arpa/inet.h> //inet_addr
static char *getIp(){
int fd;
struct ifreq ifr;
char iface[] = IFACE;
fd = socket(AF_INET, SOCK_DGRAM, 0);
//Type of address to retrieve - IPv4 IP address
ifr.ifr_addr.sa_family = AF_INET;
//Copy the interface name in the ifreq structure
strncpy(ifr.ifr_name , iface , IFNAMSIZ-1);
ioctl(fd, SIOCGIFADDR, &ifr);
close(fd);
return(inet_ntoa(( (struct sockaddr_in *)&ifr.ifr_addr )->sin_addr));
}
void sendIPToSlave()
{
int socketID;
struct sockaddr_in SockAddr;
int allowBC=1;
socketID=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
setsockopt(socketID,SOL_SOCKET,SO_BROADCAST,(void*) &allowBC,sizeof(allowBC));
SockAddr.sin_family=AF_INET;
SockAddr.sin_port=htons(DATA_PORT);
SockAddr.sin_addr.s_addr=htonl(INADDR_BROADCAST);
char *addr;
addr=getIp();
sendto(socketID,addr,strlen(addr),0,(struct sockaddr*)&SockAddr, sizeof(SockAddr));
}
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