#include "pcapextra.h"

#include <string.h>	// memcpy()
#include <stdlib.h> // malloc(), free()

/* NOTE: All code borrowed from WinPcap */

#ifndef Q_OS_WIN32
pcap_send_queue* pcap_sendqueue_alloc (u_int memsize)
{
	pcap_send_queue *tqueue;

	/* Allocate the queue */
	tqueue = (pcap_send_queue*)malloc(sizeof(pcap_send_queue));
	if(tqueue == NULL){
		return NULL;
	}

	/* Allocate the buffer */
	tqueue->buffer = (char*)malloc(memsize);
	if(tqueue->buffer == NULL){
		free(tqueue);
		return NULL;
	}

	tqueue->maxlen = memsize;
	tqueue->len = 0;

	return tqueue;
}

void pcap_sendqueue_destroy (pcap_send_queue *queue)
{
	free(queue->buffer);
	free(queue);
}

int pcap_sendqueue_queue (pcap_send_queue *queue,
		        const struct pcap_pkthdr *pkt_header, const u_char *pkt_data)
{
	if(queue->len + sizeof(struct pcap_pkthdr) + pkt_header->caplen > 
			queue->maxlen)
	{
		return -1;
	}

	/* Copy the pcap_pkthdr header*/
	memcpy(queue->buffer + queue->len, pkt_header, sizeof(struct pcap_pkthdr));
	queue->len += sizeof(struct pcap_pkthdr);

	/* copy the packet */
	memcpy(queue->buffer + queue->len, pkt_data, pkt_header->caplen);
	queue->len += pkt_header->caplen;

	return 0;
}
#endif