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/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#include <pcap.h>
#include <cstring>
#include <linux/in.h>
#include "pcapreader.hpp"
int PcapReader::open(const string& file_path)
{
char err_str[PCAP_ERRBUF_SIZE];
if (m_handle) {
m_error = "Pcap file already open";
return -1;
}
m_handle = pcap_open_offline_with_tstamp_precision(file_path.c_str(),
PCAP_TSTAMP_PRECISION_NANO,
err_str);
if (!m_handle) {
m_error = "Failed to open pcap file";
return -1;
}
m_file_beg = ftell(pcap_file(m_handle));
fseek(pcap_file(m_handle), 0, SEEK_END);
m_file_end = ftell(pcap_file(m_handle));
fseek(pcap_file(m_handle), m_file_beg, SEEK_SET);
return 0;
}
int PcapReader::readOnce(PcapPkt *pkt, uint64_t pos)
{
return -1;
}
int PcapReader::read(PcapPkt *pkt)
{
if (!m_handle) {
m_error = "No pcap file opened";
}
const uint8_t *buf = pcap_next(m_handle, &pkt->header);
if (buf) {
memcpy(pkt->buf, buf, pkt->header.len);
pktReadCount++;
}
return !!buf;
}
void PcapReader::close()
{
if (m_handle)
pcap_close(m_handle);
m_handle = NULL;
}
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