#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include "logging.h"
#include "netpkt.h"

NetPkt::NetPkt(int size)
:size(size)
{
	LogSystem::log(LOG_DEBUG, "NetPkt()");
	data = (char*)malloc(size);
}

NetPkt::~NetPkt()
{
	free(data);	
	LogSystem::log(LOG_DEBUG, "~NetPkt()");
}

int NetPkt::readFromSocket(int fd)
{
	socklen_t i = sizeof(struct sockaddr_in);
	return recvfrom(fd, this->data, this->size, 0, (struct sockaddr *)&this->addr, &i);
}

int NetPkt::show(char* buf, int size)
{
	return snprintf(buf, size, "(%s:%d) %d bytes",
		inet_ntoa(this->addr.sin_addr),
		ntohs(this->addr.sin_port),
		this->size);
}

NetPkt* NetPkt::createFromSocket(int fd)
{
	int recvsize = 0;

	if (ioctl(fd, FIONREAD, &recvsize) == -1) {
		LogSystem::log(LOG_WARNING, "NetPkt::createFromSocket()");
		return NULL;
	}

	NetPkt* retval = new NetPkt(recvsize);
	retval->readFromSocket(fd);

	return retval;
}