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/* Copyright (C) 2017 Farsight Security, Inc. <software@farsightsecurity.com>
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <netinet/in.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "libknot/errcode.h"
#include "contrib/dnstap/convert.h"
#include "contrib/dnstap/message.h"
static void set_address(const struct sockaddr *sockaddr,
ProtobufCBinaryData *addr,
protobuf_c_boolean *has_addr,
uint32_t *port,
protobuf_c_boolean *has_port)
{
if (sockaddr == NULL) {
*has_addr = 0;
*has_port = 0;
return;
}
*has_addr = 1;
*has_port = 1;
if (sockaddr->sa_family == AF_INET) {
const struct sockaddr_in *sai;
sai = (const struct sockaddr_in *)sockaddr;
addr->len = sizeof(sai->sin_addr);
addr->data = (uint8_t *)&sai->sin_addr.s_addr;
*port = ntohs(sai->sin_port);
} else if (sockaddr->sa_family == AF_INET6) {
const struct sockaddr_in6 *sai6;
sai6 = (const struct sockaddr_in6 *)sockaddr;
addr->len = sizeof(sai6->sin6_addr);
addr->data = (uint8_t *)&sai6->sin6_addr.s6_addr;
*port = ntohs(sai6->sin6_port);
}
}
static int get_family(const struct sockaddr *query_sa,
const struct sockaddr *response_sa)
{
const struct sockaddr *source = query_sa ? query_sa : response_sa;
if (source == NULL) {
return 0;
}
return dt_family_encode(source->sa_family);
}
int dt_message_fill(Dnstap__Message *m,
const Dnstap__Message__Type type,
const struct sockaddr *query_sa,
const struct sockaddr *response_sa,
const int protocol,
const void *wire,
const size_t len_wire,
const struct timespec *mtime)
{
if (m == NULL) {
return KNOT_EINVAL;
}
memset(m, 0, sizeof(*m));
m->base.descriptor = &dnstap__message__descriptor;
// Message.type
m->type = type;
// Message.socket_family
m->socket_family = get_family(query_sa, response_sa);
m->has_socket_family = m->socket_family != 0;
// Message.socket_protocol
m->socket_protocol = dt_protocol_encode(protocol);
m->has_socket_protocol = m->socket_protocol != 0;
// Message addresses
set_address(query_sa, &m->query_address, &m->has_query_address,
&m->query_port, &m->has_query_port);
set_address(response_sa, &m->response_address, &m->has_response_address,
&m->response_port, &m->has_response_port);
if (dt_message_type_is_query(type)) {
// Message.query_message
m->query_message.len = len_wire;
m->query_message.data = (uint8_t *)wire;
m->has_query_message = 1;
// Message.query_time_sec, Message.query_time_nsec
if (mtime != NULL) {
m->query_time_sec = mtime->tv_sec;
m->query_time_nsec = mtime->tv_nsec;
m->has_query_time_sec = 1;
m->has_query_time_nsec = 1;
}
} else if (dt_message_type_is_response(type)) {
// Message.response_message
m->response_message.len = len_wire;
m->response_message.data = (uint8_t *)wire;
m->has_response_message = 1;
// Message.response_time_sec, Message.response_time_nsec
if (mtime != NULL) {
m->response_time_sec = mtime->tv_sec;
m->response_time_nsec = mtime->tv_nsec;
m->has_response_time_sec = 1;
m->has_response_time_nsec = 1;
}
}
return KNOT_EOK;
}
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