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/*
* Copyright (c) 2018-2021, OARC, Inc.
* All rights reserved.
*
* This file is part of dnsjit.
*
* dnsjit is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* dnsjit is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with dnsjit. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "output/pcap.h"
#include "core/assert.h"
#include "core/object/pcap.h"
static core_log_t _log = LOG_T_INIT("output.pcap");
static output_pcap_t _defaults = {
LOG_T_INIT_OBJ("output.pcap"),
0, 0
};
core_log_t* output_pcap_log()
{
return &_log;
}
void output_pcap_init(output_pcap_t* self)
{
mlassert_self();
*self = _defaults;
}
void output_pcap_destroy(output_pcap_t* self)
{
mlassert_self();
}
int output_pcap_open(output_pcap_t* self, const char* file, int linktype, int snaplen)
{
mlassert_self();
if (self->dumper) {
lfatal("PCAP already opened");
}
if (!(self->pcap = pcap_open_dead(linktype, snaplen))) {
lcritical("pcap_open_dead() failed");
return -1;
}
if (!(self->dumper = pcap_dump_open(self->pcap, file))) {
lcritical("pcap_dump_open() error: %s", pcap_geterr(self->pcap));
pcap_close(self->pcap);
self->pcap = 0;
return -1;
}
return 0;
}
void output_pcap_close(output_pcap_t* self)
{
mlassert_self();
if (self->dumper) {
pcap_dump_close(self->dumper);
self->dumper = 0;
}
if (self->pcap) {
pcap_close(self->pcap);
self->pcap = 0;
}
}
static void _receive(output_pcap_t* self, const core_object_t* obj)
{
struct pcap_pkthdr hdr;
mlassert_self();
while (obj) {
if (obj->obj_type == CORE_OBJECT_PCAP) {
hdr.ts.tv_sec = ((const core_object_pcap_t*)obj)->ts.sec;
hdr.ts.tv_usec = ((const core_object_pcap_t*)obj)->ts.nsec / 1000;
hdr.caplen = ((const core_object_pcap_t*)obj)->caplen;
hdr.len = ((const core_object_pcap_t*)obj)->len;
pcap_dump((void*)self->dumper, &hdr, ((const core_object_pcap_t*)obj)->bytes);
return;
}
obj = obj->obj_prev;
}
}
core_receiver_t output_pcap_receiver(output_pcap_t* self)
{
if (!self->dumper) {
lfatal("PCAP not opened");
}
return (core_receiver_t)_receive;
}
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