#include "pcapio.h"
#include <pcap.h>
#include <string.h>
namespace PCAPIO{
	std::string ifaddresses(pcap_if_t *d);

	std::string pcapio_interfaces(std::map<std::string,std::string> & devmap)
	{
		std::string res;
		pcap_if_t *alldevs;
		int count = 0;
		char errbuf[PCAP_ERRBUF_SIZE];
		if(pcap_findalldevs(&alldevs, errbuf) == -1){
			res = errbuf;
			return res;
		}
		for(auto d = alldevs; d != NULL; d = d->next){
			std::string d_name = d->name;
			std::string d_des = ifaddresses(d);
			devmap[d_name] = d_des;
		}

		pcap_freealldevs(alldevs);
		return res;
	}
	std::string address_print(unsigned char * v)
	{
		std::string res;
		char buf[1024];
		int lbegin = 0, rbegin = 13;
		while (!v[lbegin] )
		{
			++lbegin;
			if (lbegin >=rbegin)
				break;
		}
		while (!v[rbegin] )
		{
			--rbegin;
			if (lbegin >=rbegin)
				break;
		}
		res += "HEX(";
		for (int i =lbegin; i<=rbegin;++i)
		{
			snprintf(buf,1024,"%02X", (unsigned int)v[i]);
			res += buf;
		}
		res += ")";
		res += "DEC(";
		for (int i =lbegin; i<=rbegin;++i)
		{
			if (i>lbegin)
				res += ".";
			snprintf(buf,1024,"%u", (unsigned int)v[i] );
			res += buf;
		}
		res += ")";

		return res;
	}
	/* Print all the available information on the given interface */
	std::string ifaddresses(pcap_if_t *d)
	{
		char buf[1024];
		pcap_addr_t *a;
		std::string res = d->name;
		res += "\n";
		if(d->description)
		{
			res += d->description;
			res += "\n";
		}

		for(a=d->addresses;a;a=a->next) {
			snprintf(buf,1024,"\tAF_0x%02X:",(unsigned int)a->addr->sa_family);
			res += buf;
			if (a->addr)
			{
				snprintf(buf,1024,"\n\t\tAddr:%s ",address_print((unsigned char *)a->addr->sa_data).c_str());
				res += buf;
			}
			if (a->netmask)
			{
				snprintf(buf,1024,"\n\t\tMask:%s ",address_print((unsigned char *)a->addr->sa_data).c_str());
				res += buf;
			}
			if (a->broadaddr)
			{
				snprintf(buf,1024,"\n\t\tCast:%s ",address_print((unsigned char *)a->addr->sa_data).c_str());
				res += buf;
			}
			if (a->dstaddr)
			{
				snprintf(buf,1024,"\n\t\tDest:%s ",address_print((unsigned char *)a->addr->sa_data).c_str());
				res += buf;
			}
			res += "\n";
		}
		return res;
	}
}