/* ... */
/* this file is part of netraf project */
/* Copyright (c) 2005 M.S. */

/* 
	this little program finds all network devices
	installed on machine and prints theirs capabilities to stdout
	
	...]$ gcc ./02devices.c -lpcap -o ./02devices
*/


#include <stdio.h>
#include <stdlib.h>
#include <pcap.h>
#include <netinet/in.h>
#include <sys/socket.h>


int main(int argc, char *argv[]){
	char errbuf[PCAP_ERRBUF_SIZE];
	pcap_if_t *alldevsp, *if_i;
	pcap_addr_t *addr_i;
	/* IP proto addr structure */
	struct sockaddr_in address;
	int findalldevs_result;

	
	/* fill alldevsp with list of machine interfaces */
	findalldevs_result = pcap_findalldevs(&alldevsp, errbuf);
	if(findalldevs_result != -1){
		
		/* let's go through the interface list */
		if_i = alldevsp;
		while(if_i != NULL){
			/* interface's system name */
			printf("%-10s", if_i->name);
			/* interface's description */
			printf("desc: ");
			(if_i->description == NULL) ?
				printf("Regular device\n") : printf("%s\n", if_i->description);
			/* is it loopback device? */
			printf("%-10sloopback: ", " ");
			(if_i->flags & PCAP_IF_LOOPBACK > 0) ?
				printf("YES") : printf("NO");
			printf("\n");
			
			/* go through interface adresses list */
			addr_i = if_i->addresses;
			while(addr_i != NULL){
				address = *(struct sockaddr_in *)(addr_i->addr);
				/* IP layer informations */
				if(address.sin_family == AF_INET){
					printf("%-10sinet addr: %s\n", " ", inet_ntoa(address.sin_addr.s_addr));
					if(addr_i->netmask != NULL){
						address = *(struct sockaddr_in *)(addr_i->netmask);
						printf("%-10snetmask: %s\n", " ", inet_ntoa(address.sin_addr.s_addr));
					}
					if(addr_i->broadaddr != NULL){
						address = *(struct sockaddr_in *)(addr_i->broadaddr);
						printf("%-10sbroadcast: %s\n", " ", inet_ntoa(address.sin_addr.s_addr));
					}
					if(addr_i->dstaddr != NULL){
						address = *(struct sockaddr_in *)(addr_i->dstaddr);
						printf("%-10spointopoint: %s\n", " ", inet_ntoa(address.sin_addr.s_addr));
					}
				}
				addr_i = addr_i->next;
			} /* end while(addr_i != NULL) */
			
			if_i = if_i->next;
			printf("\n");
		} /* end while(if_i != NULL) */
		
		/* free alldevs list */
		pcap_freealldevs(alldevsp);

	}else{

		/* if something were wrong, here is error message */
		printf("Error:%s\n", errbuf);
		exit(EXIT_FAILURE);

	}

	exit(EXIT_SUCCESS);
}