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/*
* Copyright (c) 2019, CZ.NIC, z.s.p.o.
* 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 "filter/copy.h"
#include "core/assert.h"
static core_log_t _log = LOG_T_INIT("filter.copy");
static filter_copy_t _defaults = {
LOG_T_INIT_OBJ("filter.copy"),
0, 0,
0
};
core_log_t* filter_copy_log()
{
return &_log;
}
void filter_copy_init(filter_copy_t* self)
{
mlassert_self();
*self = _defaults;
}
void filter_copy_destroy(filter_copy_t* self)
{
mlassert_self();
}
void filter_copy_set(filter_copy_t* self, int32_t obj_type)
{
mlassert_self();
switch (obj_type) {
case CORE_OBJECT_NONE:
self->copy |= 0x1;
break;
case CORE_OBJECT_PCAP:
self->copy |= 0x2;
break;
case CORE_OBJECT_ETHER:
self->copy |= 0x4;
break;
case CORE_OBJECT_NULL:
self->copy |= 0x8;
break;
case CORE_OBJECT_LOOP:
self->copy |= 0x10;
break;
case CORE_OBJECT_LINUXSLL:
self->copy |= 0x20;
break;
case CORE_OBJECT_IEEE802:
self->copy |= 0x40;
break;
case CORE_OBJECT_GRE:
self->copy |= 0x80;
break;
case CORE_OBJECT_IP:
self->copy |= 0x100;
break;
case CORE_OBJECT_IP6:
self->copy |= 0x200;
break;
case CORE_OBJECT_ICMP:
self->copy |= 0x400;
break;
case CORE_OBJECT_ICMP6:
self->copy |= 0x800;
break;
case CORE_OBJECT_UDP:
self->copy |= 0x1000;
break;
case CORE_OBJECT_TCP:
self->copy |= 0x2000;
break;
case CORE_OBJECT_PAYLOAD:
self->copy |= 0x4000;
break;
case CORE_OBJECT_DNS:
self->copy |= 0x8000;
break;
default:
lfatal("unknown type %d", obj_type);
}
}
uint64_t filter_copy_get(filter_copy_t* self, int32_t obj_type)
{
mlassert_self();
switch (obj_type) {
case CORE_OBJECT_NONE:
return self->copy & 0x1;
case CORE_OBJECT_PCAP:
return self->copy & 0x2;
case CORE_OBJECT_ETHER:
return self->copy & 0x4;
case CORE_OBJECT_NULL:
return self->copy & 0x8;
case CORE_OBJECT_LOOP:
return self->copy & 0x10;
case CORE_OBJECT_LINUXSLL:
return self->copy & 0x20;
case CORE_OBJECT_IEEE802:
return self->copy & 0x40;
case CORE_OBJECT_GRE:
return self->copy & 0x80;
case CORE_OBJECT_IP:
return self->copy & 0x100;
case CORE_OBJECT_IP6:
return self->copy & 0x200;
case CORE_OBJECT_ICMP:
return self->copy & 0x400;
case CORE_OBJECT_ICMP6:
return self->copy & 0x800;
case CORE_OBJECT_UDP:
return self->copy & 0x1000;
case CORE_OBJECT_TCP:
return self->copy & 0x2000;
case CORE_OBJECT_PAYLOAD:
return self->copy & 0x4000;
case CORE_OBJECT_DNS:
return self->copy & 0x8000;
default:
lfatal("unknown type %d", obj_type);
}
return 0;
}
static void _receive(filter_copy_t* self, const core_object_t* obj)
{
mlassert_self();
lassert(obj, "obj is nil");
core_object_t* outobj = NULL;
core_object_t* next = NULL;
core_object_t* current = NULL;
const core_object_t* srcobj = obj;
do {
if (filter_copy_get(self, srcobj->obj_type)) {
next = current;
current = core_object_copy(srcobj);
if (next == NULL) {
next = current;
outobj = current;
} else {
next->obj_prev = current;
}
}
srcobj = srcobj->obj_prev;
} while (srcobj != NULL);
if (outobj == NULL) {
lnotice("object discarded (no types to copy)");
return;
}
self->recv(self->recv_ctx, outobj);
}
core_receiver_t filter_copy_receiver(filter_copy_t* self)
{
mlassert_self();
if (!self->recv) {
lfatal("no receiver(s) set");
}
return (core_receiver_t)_receive;
}
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