mirror of
https://github.com/ntop/ntopng.git
synced 2026-05-20 00:57:00 +00:00
130 lines
3 KiB
C++
130 lines
3 KiB
C++
/*
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*
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* (C) 2015-18 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "ntop_includes.h"
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/* ********************************************* */
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PacketDumper::PacketDumper(NetworkInterface *i, const char *path) {
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init(i);
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out_path = strdup(path);
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}
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/* ********************************************* */
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PacketDumper::~PacketDumper() {
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closeDump();
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if (out_path) free(out_path);
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}
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/* ********************************************* */
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void PacketDumper::init(NetworkInterface *i) {
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char *name = i->get_name();
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iface = i;
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file_id = 0;
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dumper = NULL;
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num_dumped_packets = 0;
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max_bytes_per_file = 0;
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num_bytes_cur_file = 0;
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out_path = NULL;
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if (strcmp(name, "lo") == 0)
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iface_type = DLT_NULL;
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else
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iface_type = i->get_datalink();
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}
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/* ********************************************* */
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void PacketDumper::closeDump() {
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if(dumper) {
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pcap_dump_close(dumper);
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dumper = NULL;
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}
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}
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/* ********************************************* */
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void PacketDumper::idle() {
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checkClose();
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}
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/* ********************************************* */
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bool PacketDumper::checkClose() {
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if (num_bytes_cur_file >= max_bytes_per_file) {
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closeDump();
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return true;
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}
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return false;
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}
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/* ********************************************* */
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bool PacketDumper::openDump() {
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char pcap_path[MAX_PATH];
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if (dumper != NULL)
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return true;
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max_bytes_per_file = ntop->getPrefs()->get_max_extracted_pcap_mbytes()*1024*1024;
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Utils::mkdir_tree(out_path);
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snprintf(pcap_path, sizeof(pcap_path), "%s/%u.pcap", out_path, file_id+1);
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dumper = pcap_dump_open(pcap_open_dead(iface_type, 16384 /* MTU */), pcap_path);
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if (dumper == NULL) {
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ntop->getTrace()->traceEvent(TRACE_WARNING, "Unable to create pcap file %s", pcap_path);
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return false;
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}
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file_id++;
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num_bytes_cur_file = 0;
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ntop->getTrace()->traceEvent(TRACE_INFO, "Created pcap dump %s [max bytes=%u]",
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pcap_path, max_bytes_per_file);
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return true;
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}
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/* ********************************************* */
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void PacketDumper::dumpPacket(const struct pcap_pkthdr *h, const u_char *packet) {
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if (dumper == NULL) {
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openDump();
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if (dumper == NULL)
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return;
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}
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pcap_dump((u_char*)dumper, h, packet);
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num_dumped_packets++;
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num_bytes_cur_file += sizeof(struct pcap_disk_pkthdr) + h->caplen;
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checkClose();
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}
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/* ********************************************* */
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