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/* Copyright (C) 2023 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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 <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include "libknot/attribute.h"
#include "libknot/endian.h"
#include "libknot/errcode.h"
#include "libknot/probe/probe.h"
#include "contrib/macros.h"
_public_
int knot_probe_data_set(knot_probe_data_t *data, knot_probe_proto_t proto,
const struct sockaddr_storage *local_addr,
const struct sockaddr_storage *remote_addr,
const knot_pkt_t *query, const knot_pkt_t *reply,
uint16_t rcode)
{
if (data == NULL || remote_addr == NULL || query == NULL) {
return KNOT_EINVAL;
}
data->proto = proto;
if (remote_addr->ss_family == AF_INET) {
const struct sockaddr_in *sa = (struct sockaddr_in *)remote_addr;
const struct sockaddr_in *da = (struct sockaddr_in *)local_addr;
memcpy(data->remote.addr, &sa->sin_addr, sizeof(sa->sin_addr));
memset(data->remote.addr + sizeof(sa->sin_addr), 0,
sizeof(data->remote.addr) - sizeof(sa->sin_addr));
data->remote.port = be16toh(sa->sin_port);
if (da != NULL) {
memcpy(data->local.addr, &da->sin_addr, sizeof(da->sin_addr));
memset(data->local.addr + sizeof(da->sin_addr), 0,
sizeof(data->local.addr) - sizeof(da->sin_addr));
data->local.port = be16toh(da->sin_port);
} else {
memset(&data->local, 0, sizeof(data->local));
}
data->ip = 4;
} else if (remote_addr->ss_family == AF_INET6) {
const struct sockaddr_in6 *sa = (struct sockaddr_in6 *)remote_addr;
const struct sockaddr_in6 *da = (struct sockaddr_in6 *)local_addr;
memcpy(data->remote.addr, &sa->sin6_addr, sizeof(sa->sin6_addr));
data->remote.port = be16toh(sa->sin6_port);
if (da != NULL) {
memcpy(data->local.addr, &da->sin6_addr, sizeof(da->sin6_addr));
data->local.port = be16toh(da->sin6_port);
} else {
memset(&data->local, 0, sizeof(data->local));
}
data->ip = 6;
} else {
memset(&data->remote, 0, sizeof(data->remote));
memset(&data->local, 0, sizeof(data->local));
data->ip = 0;
}
if (reply != NULL) {
memcpy(&data->reply.hdr, reply->wire, sizeof(data->reply.hdr));
data->reply.size = knot_pkt_size(reply);
data->reply.rcode = rcode;
} else {
memset(&data->reply, 0, sizeof(data->reply));
}
data->reply.ede = KNOT_PROBE_DATA_EDE_NONE;
data->tcp_rtt = 0;
if (query->opt_rr != NULL) {
data->query_edns.options = 0;
data->query_edns.payload = knot_edns_get_payload(query->opt_rr);
data->query_edns.version = knot_edns_get_version(query->opt_rr);
data->query_edns.present = 1;
data->query_edns.flag_do = knot_edns_do(query->opt_rr);
if (query->edns_opts != NULL) {
for (int i = 0; i <= KNOT_EDNS_MAX_OPTION_CODE; i++) {
if (query->edns_opts->ptr[i] != NULL) {
data->query_edns.options |= (1 << i);
}
}
}
data->query_edns.reserved = 0;
} else {
memset(&data->query_edns, 0, sizeof(data->query_edns));
}
memcpy(&data->query.hdr, query->wire, sizeof(data->query.hdr));
data->query.size = knot_pkt_size(query);
data->query.qclass = knot_pkt_qclass(query);
data->query.qtype = knot_pkt_qtype(query);
data->query.qname_len = knot_dname_size(knot_pkt_qname(query));
memcpy(data->query.qname, knot_pkt_qname(query), data->query.qname_len);
memset(data->query.qname + data->query.qname_len, 0,
MIN(8, sizeof(data->query.qname) - data->query.qname_len));
return KNOT_EOK;
}
_public_
uint32_t knot_probe_tcp_rtt(int sockfd)
{
#if defined(__linux__)
struct tcp_info info = { 0 };
socklen_t info_length = sizeof(info);
if (getsockopt(sockfd, SOL_TCP, TCP_INFO, &info, &info_length) == 0) {
return info.tcpi_rtt;
}
#endif
return 0;
}
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