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-rw-r--r--src/contrib/dnstap/convert.c142
-rw-r--r--src/contrib/dnstap/convert.h60
-rw-r--r--src/contrib/dnstap/dnstap.c41
-rw-r--r--src/contrib/dnstap/dnstap.h47
-rw-r--r--src/contrib/dnstap/dnstap.proto270
-rw-r--r--src/contrib/dnstap/message.c130
-rw-r--r--src/contrib/dnstap/message.h63
-rw-r--r--src/contrib/dnstap/reader.c103
-rw-r--r--src/contrib/dnstap/reader.h73
-rw-r--r--src/contrib/dnstap/writer.c120
-rw-r--r--src/contrib/dnstap/writer.h71
11 files changed, 1120 insertions, 0 deletions
diff --git a/src/contrib/dnstap/convert.c b/src/contrib/dnstap/convert.c
new file mode 100644
index 0000000..93ee8e9
--- /dev/null
+++ b/src/contrib/dnstap/convert.c
@@ -0,0 +1,142 @@
+/* Copyright (C) 2016 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/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+
+#include "contrib/dnstap/convert.h"
+#include "contrib/dnstap/dnstap.pb-c.h"
+
+/*!
+ * \brief Translation between real and Dnstap value.
+ */
+typedef struct mapping {
+ int real;
+ int dnstap;
+} mapping_t;
+
+/*!
+ * \brief Mapping for network family.
+ */
+static const mapping_t SOCKET_FAMILY_MAPPING[] = {
+ { AF_INET, DNSTAP__SOCKET_FAMILY__INET },
+ { AF_INET6, DNSTAP__SOCKET_FAMILY__INET6 },
+ { 0 }
+};
+
+/*!
+ * \brief Mapping from network protocol.
+ */
+static const mapping_t SOCKET_PROTOCOL_MAPPING[] = {
+ { IPPROTO_UDP, DNSTAP__SOCKET_PROTOCOL__UDP },
+ { IPPROTO_TCP, DNSTAP__SOCKET_PROTOCOL__TCP },
+ { 0 }
+};
+
+/*!
+ * \brief Get Dnstap value for a given real value.
+ */
+static int encode(const mapping_t *mapping, int real)
+{
+ for (const mapping_t *m = mapping; m->real != 0; m += 1) {
+ if (m->real == real) {
+ return m->dnstap;
+ }
+ }
+
+ return 0;
+}
+
+/*!
+ * \brief Get real value for a given Dnstap value.
+ */
+static int decode(const mapping_t *mapping, int dnstap)
+{
+ for (const mapping_t *m = mapping; m->real != 0; m += 1) {
+ if (m->dnstap == dnstap) {
+ return m->real;
+ }
+ }
+
+ return 0;
+}
+
+/* -- public API ----------------------------------------------------------- */
+
+Dnstap__SocketFamily dt_family_encode(int family)
+{
+ return encode(SOCKET_FAMILY_MAPPING, family);
+}
+
+int dt_family_decode(Dnstap__SocketFamily dnstap_family)
+{
+ return decode(SOCKET_FAMILY_MAPPING, dnstap_family);
+}
+
+Dnstap__SocketProtocol dt_protocol_encode(int protocol)
+{
+ return encode(SOCKET_PROTOCOL_MAPPING, protocol);
+}
+
+int dt_protocol_decode(Dnstap__SocketProtocol dnstap_protocol)
+{
+ return decode(SOCKET_PROTOCOL_MAPPING, dnstap_protocol);
+}
+
+bool dt_message_type_is_query(Dnstap__Message__Type type)
+{
+ switch (type) {
+ case DNSTAP__MESSAGE__TYPE__AUTH_QUERY:
+ case DNSTAP__MESSAGE__TYPE__CLIENT_QUERY:
+ case DNSTAP__MESSAGE__TYPE__FORWARDER_QUERY:
+ case DNSTAP__MESSAGE__TYPE__RESOLVER_QUERY:
+ case DNSTAP__MESSAGE__TYPE__STUB_QUERY:
+ case DNSTAP__MESSAGE__TYPE__TOOL_QUERY:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool dt_message_type_is_response(Dnstap__Message__Type type)
+{
+ switch (type) {
+ case DNSTAP__MESSAGE__TYPE__AUTH_RESPONSE:
+ case DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE:
+ case DNSTAP__MESSAGE__TYPE__FORWARDER_RESPONSE:
+ case DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE:
+ case DNSTAP__MESSAGE__TYPE__STUB_RESPONSE:
+ case DNSTAP__MESSAGE__TYPE__TOOL_RESPONSE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool dt_message_role_is_initiator(Dnstap__Message__Type type)
+{
+ switch (type) {
+ case DNSTAP__MESSAGE__TYPE__AUTH_QUERY:
+ case DNSTAP__MESSAGE__TYPE__AUTH_RESPONSE:
+ case DNSTAP__MESSAGE__TYPE__CLIENT_QUERY:
+ case DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE:
+ return false;
+ default:
+ return true;
+ }
+}
diff --git a/src/contrib/dnstap/convert.h b/src/contrib/dnstap/convert.h
new file mode 100644
index 0000000..0e2a86a
--- /dev/null
+++ b/src/contrib/dnstap/convert.h
@@ -0,0 +1,60 @@
+/* Copyright (C) 2018 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/>.
+ */
+
+/*!
+ * \brief Dnstap identifiers conversions.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+#include "contrib/dnstap/dnstap.pb-c.h"
+
+/*!
+ * \brief Get Dnstap socket family from the real one.
+ */
+Dnstap__SocketFamily dt_family_encode(int family);
+
+/*!
+ * \brief Get real socket family from the Dnstap one.
+ */
+int dt_family_decode(Dnstap__SocketFamily dnstap_family);
+
+/*!
+ * \brief Get Dnstap protocol from a real one.
+ */
+Dnstap__SocketProtocol dt_protocol_encode(int protocol);
+
+/*!
+ * \brief Get real protocol from the Dnstap one.
+ */
+int dt_protocol_decode(Dnstap__SocketProtocol dnstap_protocol);
+
+/*!
+ * Check if a message type is any type of a query.
+ */
+bool dt_message_type_is_query(Dnstap__Message__Type type);
+
+/*!
+ * Check if a message type is any type of a response.
+ */
+bool dt_message_type_is_response(Dnstap__Message__Type type);
+
+/*!
+ * Check if a message role is any type of an initiator.
+ */
+bool dt_message_role_is_initiator(Dnstap__Message__Type type);
diff --git a/src/contrib/dnstap/dnstap.c b/src/contrib/dnstap/dnstap.c
new file mode 100644
index 0000000..1516b4d
--- /dev/null
+++ b/src/contrib/dnstap/dnstap.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 2014 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 <stdint.h>
+#include <stdlib.h>
+
+#include "contrib/dnstap/dnstap.h"
+#include "contrib/dnstap/dnstap.pb-c.h"
+
+#define DNSTAP_INITIAL_BUF_SIZE 256
+
+uint8_t* dt_pack(const Dnstap__Dnstap *d, uint8_t **buf, size_t *sz)
+{
+ ProtobufCBufferSimple sbuf = { { NULL } };
+
+ sbuf.base.append = protobuf_c_buffer_simple_append;
+ sbuf.len = 0;
+ sbuf.alloced = DNSTAP_INITIAL_BUF_SIZE;
+ sbuf.data = malloc(sbuf.alloced);
+ if (sbuf.data == NULL) {
+ return NULL;
+ }
+ sbuf.must_free_data = 1;
+
+ *sz = dnstap__dnstap__pack_to_buffer(d, (ProtobufCBuffer *) &sbuf);
+ *buf = sbuf.data;
+ return *buf;
+}
diff --git a/src/contrib/dnstap/dnstap.h b/src/contrib/dnstap/dnstap.h
new file mode 100644
index 0000000..f7aecbc
--- /dev/null
+++ b/src/contrib/dnstap/dnstap.h
@@ -0,0 +1,47 @@
+/* Copyright (C) 2014 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/>.
+ */
+
+/*!
+ * \author Robert Edmonds <edmonds@fsi.io>
+ *
+ * \brief Public interface for dnstap.
+ */
+
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "contrib/dnstap/dnstap.pb-c.h"
+
+/*! \brief Frame Streams "Content Type" value for dnstap. */
+#define DNSTAP_CONTENT_TYPE "protobuf:dnstap.Dnstap"
+
+/*!
+ * \brief Serializes a filled out dnstap protobuf struct. Dynamically allocates
+ * storage for the serialized frame.
+ *
+ * \note This function returns a copy of its parameter return value 'buf' to
+ * make error checking slightly easier.
+ *
+ * \param d dnstap protobuf struct.
+ * \param[out] buf Serialized frame.
+ * \param[out] sz Size in bytes of the serialized frame.
+ *
+ * \return Serialized frame.
+ * \retval NULL if error.
+ */
+uint8_t* dt_pack(const Dnstap__Dnstap *d, uint8_t **buf, size_t *sz);
diff --git a/src/contrib/dnstap/dnstap.proto b/src/contrib/dnstap/dnstap.proto
new file mode 100644
index 0000000..ea5c77a
--- /dev/null
+++ b/src/contrib/dnstap/dnstap.proto
@@ -0,0 +1,270 @@
+// dnstap: flexible, structured event replication format for DNS software
+//
+// This file contains the protobuf schemas for the "dnstap" structured event
+// replication format for DNS software.
+
+// Written in 2013-2014 by Farsight Security, Inc.
+//
+// To the extent possible under law, the author(s) have dedicated all
+// copyright and related and neighboring rights to this file to the public
+// domain worldwide. This file is distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along
+// with this file. If not, see:
+//
+// <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+syntax = "proto2";
+
+package dnstap;
+
+// "Dnstap": this is the top-level dnstap type, which is a "union" type that
+// contains other kinds of dnstap payloads, although currently only one type
+// of dnstap payload is defined.
+// See: https://developers.google.com/protocol-buffers/docs/techniques#union
+message Dnstap {
+ // DNS server identity.
+ // If enabled, this is the identity string of the DNS server which generated
+ // this message. Typically this would be the same string as returned by an
+ // "NSID" (RFC 5001) query.
+ optional bytes identity = 1;
+
+ // DNS server version.
+ // If enabled, this is the version string of the DNS server which generated
+ // this message. Typically this would be the same string as returned by a
+ // "version.bind" query.
+ optional bytes version = 2;
+
+ // Extra data for this payload.
+ // This field can be used for adding an arbitrary byte-string annotation to
+ // the payload. No encoding or interpretation is applied or enforced.
+ optional bytes extra = 3;
+
+ // Identifies which field below is filled in.
+ enum Type {
+ MESSAGE = 1;
+ }
+ required Type type = 15;
+
+ // One of the following will be filled in.
+ optional Message message = 14;
+}
+
+// SocketFamily: the network protocol family of a socket. This specifies how
+// to interpret "network address" fields.
+enum SocketFamily {
+ INET = 1; // IPv4 (RFC 791)
+ INET6 = 2; // IPv6 (RFC 2460)
+}
+
+// SocketProtocol: the transport protocol of a socket. This specifies how to
+// interpret "transport port" fields.
+enum SocketProtocol {
+ UDP = 1; // User Datagram Protocol (RFC 768)
+ TCP = 2; // Transmission Control Protocol (RFC 793)
+}
+
+// Message: a wire-format (RFC 1035 section 4) DNS message and associated
+// metadata. Applications generating "Message" payloads should follow
+// certain requirements based on the MessageType, see below.
+message Message {
+
+ // There are eight types of "Message" defined that correspond to the
+ // four arrows in the following diagram, slightly modified from RFC 1035
+ // section 2:
+
+ // +---------+ +----------+ +--------+
+ // | | query | | query | |
+ // | Stub |-SQ--------CQ->| Recursive|-RQ----AQ->| Auth. |
+ // | Resolver| | Server | | Name |
+ // | |<-SR--------CR-| |<-RR----AR-| Server |
+ // +---------+ response | | response | |
+ // +----------+ +--------+
+
+ // Each arrow has two Type values each, one for each "end" of each arrow,
+ // because these are considered to be distinct events. Each end of each
+ // arrow on the diagram above has been marked with a two-letter Type
+ // mnemonic. Clockwise from upper left, these mnemonic values are:
+ //
+ // SQ: STUB_QUERY
+ // CQ: CLIENT_QUERY
+ // RQ: RESOLVER_QUERY
+ // AQ: AUTH_QUERY
+ // AR: AUTH_RESPONSE
+ // RR: RESOLVER_RESPONSE
+ // CR: CLIENT_RESPONSE
+ // SR: STUB_RESPONSE
+
+ // Two additional types of "Message" have been defined for the
+ // "forwarding" case where an upstream DNS server is responsible for
+ // further recursion. These are not shown on the diagram above, but have
+ // the following mnemonic values:
+
+ // FQ: FORWARDER_QUERY
+ // FR: FORWARDER_RESPONSE
+
+ // The "Message" Type values are defined below.
+
+ enum Type {
+ // AUTH_QUERY is a DNS query message received from a resolver by an
+ // authoritative name server, from the perspective of the authoritative
+ // name server.
+ AUTH_QUERY = 1;
+
+ // AUTH_RESPONSE is a DNS response message sent from an authoritative
+ // name server to a resolver, from the perspective of the authoritative
+ // name server.
+ AUTH_RESPONSE = 2;
+
+ // RESOLVER_QUERY is a DNS query message sent from a resolver to an
+ // authoritative name server, from the perspective of the resolver.
+ // Resolvers typically clear the RD (recursion desired) bit when
+ // sending queries.
+ RESOLVER_QUERY = 3;
+
+ // RESOLVER_RESPONSE is a DNS response message received from an
+ // authoritative name server by a resolver, from the perspective of
+ // the resolver.
+ RESOLVER_RESPONSE = 4;
+
+ // CLIENT_QUERY is a DNS query message sent from a client to a DNS
+ // server which is expected to perform further recursion, from the
+ // perspective of the DNS server. The client may be a stub resolver or
+ // forwarder or some other type of software which typically sets the RD
+ // (recursion desired) bit when querying the DNS server. The DNS server
+ // may be a simple forwarding proxy or it may be a full recursive
+ // resolver.
+ CLIENT_QUERY = 5;
+
+ // CLIENT_RESPONSE is a DNS response message sent from a DNS server to
+ // a client, from the perspective of the DNS server. The DNS server
+ // typically sets the RA (recursion available) bit when responding.
+ CLIENT_RESPONSE = 6;
+
+ // FORWARDER_QUERY is a DNS query message sent from a downstream DNS
+ // server to an upstream DNS server which is expected to perform
+ // further recursion, from the perspective of the downstream DNS
+ // server.
+ FORWARDER_QUERY = 7;
+
+ // FORWARDER_RESPONSE is a DNS response message sent from an upstream
+ // DNS server performing recursion to a downstream DNS server, from the
+ // perspective of the downstream DNS server.
+ FORWARDER_RESPONSE = 8;
+
+ // STUB_QUERY is a DNS query message sent from a stub resolver to a DNS
+ // server, from the perspective of the stub resolver.
+ STUB_QUERY = 9;
+
+ // STUB_RESPONSE is a DNS response message sent from a DNS server to a
+ // stub resolver, from the perspective of the stub resolver.
+ STUB_RESPONSE = 10;
+
+ // TOOL_QUERY is a DNS query message sent from a DNS software tool to a
+ // DNS server, from the perspective of the tool.
+ TOOL_QUERY = 11;
+
+ // TOOL_RESPONSE is a DNS response message received by a DNS software
+ // tool from a DNS server, from the perspective of the tool.
+ TOOL_RESPONSE = 12;
+ }
+
+ // One of the Type values described above.
+ required Type type = 1;
+
+ // One of the SocketFamily values described above.
+ optional SocketFamily socket_family = 2;
+
+ // One of the SocketProtocol values described above.
+ optional SocketProtocol socket_protocol = 3;
+
+ // The network address of the message initiator.
+ // For SocketFamily INET, this field is 4 octets (IPv4 address).
+ // For SocketFamily INET6, this field is 16 octets (IPv6 address).
+ optional bytes query_address = 4;
+
+ // The network address of the message responder.
+ // For SocketFamily INET, this field is 4 octets (IPv4 address).
+ // For SocketFamily INET6, this field is 16 octets (IPv6 address).
+ optional bytes response_address = 5;
+
+ // The transport port of the message initiator.
+ // This is a 16-bit UDP or TCP port number, depending on SocketProtocol.
+ optional uint32 query_port = 6;
+
+ // The transport port of the message responder.
+ // This is a 16-bit UDP or TCP port number, depending on SocketProtocol.
+ optional uint32 response_port = 7;
+
+ // The time at which the DNS query message was sent or received, depending
+ // on whether this is an AUTH_QUERY, RESOLVER_QUERY, or CLIENT_QUERY.
+ // This is the number of seconds since the UNIX epoch.
+ optional uint64 query_time_sec = 8;
+
+ // The time at which the DNS query message was sent or received.
+ // This is the seconds fraction, expressed as a count of nanoseconds.
+ optional fixed32 query_time_nsec = 9;
+
+ // The initiator's original wire-format DNS query message, verbatim.
+ optional bytes query_message = 10;
+
+ // The "zone" or "bailiwick" pertaining to the DNS query message.
+ // This is a wire-format DNS domain name.
+ optional bytes query_zone = 11;
+
+ // The time at which the DNS response message was sent or received,
+ // depending on whether this is an AUTH_RESPONSE, RESOLVER_RESPONSE, or
+ // CLIENT_RESPONSE.
+ // This is the number of seconds since the UNIX epoch.
+ optional uint64 response_time_sec = 12;
+
+ // The time at which the DNS response message was sent or received.
+ // This is the seconds fraction, expressed as a count of nanoseconds.
+ optional fixed32 response_time_nsec = 13;
+
+ // The responder's original wire-format DNS response message, verbatim.
+ optional bytes response_message = 14;
+}
+
+// All fields except for 'type' in the Message schema are optional.
+// It is recommended that at least the following fields be filled in for
+// particular types of Messages.
+
+// AUTH_QUERY:
+// socket_family, socket_protocol
+// query_address, query_port
+// query_message
+// query_time_sec, query_time_nsec
+
+// AUTH_RESPONSE:
+// socket_family, socket_protocol
+// query_address, query_port
+// query_time_sec, query_time_nsec
+// response_message
+// response_time_sec, response_time_nsec
+
+// RESOLVER_QUERY:
+// socket_family, socket_protocol
+// query_message
+// query_time_sec, query_time_nsec
+// query_zone
+// response_address, response_port
+
+// RESOLVER_RESPONSE:
+// socket_family, socket_protocol
+// query_time_sec, query_time_nsec
+// query_zone
+// response_address, response_port
+// response_message
+// response_time_sec, response_time_nsec
+
+// CLIENT_QUERY:
+// socket_family, socket_protocol
+// query_message
+// query_time_sec, query_time_nsec
+
+// CLIENT_RESPONSE:
+// socket_family, socket_protocol
+// query_time_sec, query_time_nsec
+// response_message
+// response_time_sec, response_time_nsec
diff --git a/src/contrib/dnstap/message.c b/src/contrib/dnstap/message.c
new file mode 100644
index 0000000..a5f798e
--- /dev/null
+++ b/src/contrib/dnstap/message.c
@@ -0,0 +1,130 @@
+/* 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;
+}
diff --git a/src/contrib/dnstap/message.h b/src/contrib/dnstap/message.h
new file mode 100644
index 0000000..b9e3aff
--- /dev/null
+++ b/src/contrib/dnstap/message.h
@@ -0,0 +1,63 @@
+/* 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/>.
+ */
+
+/*!
+ * \author Robert Edmonds <edmonds@fsi.io>
+ *
+ * \brief Dnstap message interface.
+ */
+
+#pragma once
+
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <stddef.h>
+
+#include "contrib/dnstap/dnstap.pb-c.h"
+
+/*!
+ * \brief Fill a Dnstap__Message structure with the given parameters.
+ *
+ * \param[out] m
+ * Dnstap__Message structure to fill. Will be zeroed first.
+ * \param type
+ * One of the DNSTAP__MESSAGE__TYPE__* values.
+ * \param query_sa
+ * sockaddr_in or sockaddr_in6 to use when filling the 'socket_family',
+ * 'query_address', 'query_port' fields.
+ * \param response_sa
+ * sockaddr_in or sockaddr_in6 to use when filling the 'socket_family',
+ * 'response_address', 'response_port' fields.
+ * \param protocol
+ * \c IPPROTO_UDP or \c IPPROTO_TCP.
+ * \param wire
+ * Wire-format query message or response message (depending on 'type').
+ * \param len_wire
+ * Length in bytes of 'wire'.
+ * \param mtime
+ * Message time. May be NULL.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EINVAL
+ */
+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);
diff --git a/src/contrib/dnstap/reader.c b/src/contrib/dnstap/reader.c
new file mode 100644
index 0000000..dc1c053
--- /dev/null
+++ b/src/contrib/dnstap/reader.c
@@ -0,0 +1,103 @@
+/* Copyright (C) 2014 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libknot/attribute.h"
+#include "libknot/errcode.h"
+
+#include "contrib/dnstap/dnstap.h"
+#include "contrib/dnstap/reader.h"
+
+dt_reader_t* dt_reader_create(const char *file_path)
+{
+ struct fstrm_file_options *fopt = NULL;
+ struct fstrm_reader_options *ropt = NULL;
+ dt_reader_t *reader = NULL;
+ fstrm_res res;
+
+ reader = calloc(1, sizeof(dt_reader_t));
+ if (reader == NULL) {
+ goto fail;
+ }
+
+ // Open reader.
+ fopt = fstrm_file_options_init();
+ fstrm_file_options_set_file_path(fopt, file_path);
+ ropt = fstrm_reader_options_init();
+ fstrm_reader_options_add_content_type(ropt,
+ (const uint8_t *) DNSTAP_CONTENT_TYPE,
+ strlen(DNSTAP_CONTENT_TYPE));
+ reader->fr = fstrm_file_reader_init(fopt, ropt);
+ fstrm_file_options_destroy(&fopt);
+ fstrm_reader_options_destroy(&ropt);
+ if (reader->fr == NULL) {
+ goto fail;
+ }
+ res = fstrm_reader_open(reader->fr);
+ if (res != fstrm_res_success) {
+ goto fail;
+ }
+
+ return reader;
+fail:
+ dt_reader_free(reader);
+ return NULL;
+}
+
+void dt_reader_free(dt_reader_t *reader)
+{
+ if (reader == NULL) {
+ return;
+ }
+
+ fstrm_reader_destroy(&reader->fr);
+ free(reader);
+}
+
+int dt_reader_read(dt_reader_t *reader, Dnstap__Dnstap **d)
+{
+ fstrm_res res;
+ const uint8_t *data = NULL;
+ size_t len = 0;
+
+ res = fstrm_reader_read(reader->fr, &data, &len);
+ if (res == fstrm_res_success) {
+ *d = dnstap__dnstap__unpack(NULL, len, data);
+ if (*d == NULL) {
+ return KNOT_ENOMEM;
+ }
+ } else if (res == fstrm_res_failure) {
+ return KNOT_ERROR;
+ } else if (res == fstrm_res_stop) {
+ return KNOT_EOF;
+ }
+
+ return KNOT_EOK;
+}
+
+void dt_reader_free_frame(_unused_ dt_reader_t *reader, Dnstap__Dnstap **frame_ptr)
+{
+ if (!*frame_ptr) {
+ return;
+ }
+
+ dnstap__dnstap__free_unpacked(*frame_ptr, NULL);
+ *frame_ptr = NULL;
+}
diff --git a/src/contrib/dnstap/reader.h b/src/contrib/dnstap/reader.h
new file mode 100644
index 0000000..cc6385f
--- /dev/null
+++ b/src/contrib/dnstap/reader.h
@@ -0,0 +1,73 @@
+/* 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/>.
+ */
+
+/*!
+ * \brief Dnstap file reader.
+ */
+
+#pragma once
+
+#include <fstrm.h>
+#include <protobuf-c/protobuf-c.h>
+
+#include "contrib/dnstap/dnstap.pb-c.h"
+
+/*! \brief Structure for dnstap file reader. */
+typedef struct {
+ /*!< Input reader. */
+ struct fstrm_reader *fr;
+} dt_reader_t;
+
+/*!
+ * \brief Creates dnstap file reader structure.
+ *
+ * \param file_path Name of file to read input from.
+ *
+ * \retval reader if success.
+ * \retval NULL if error.
+ */
+dt_reader_t* dt_reader_create(const char *file_path);
+
+/*!
+ * \brief Close dnstap file reader.
+ *
+ * \param reader dnstap file reader structure.
+ */
+void dt_reader_free(dt_reader_t *reader);
+
+/*!
+ * \brief Read a dnstap protobuf from a dnstap file reader.
+ *
+ * Caller must deallocate the returned protobuf with the
+ * dnstap__dnstap__free_unpacked() function.
+ *
+ * \param[in] reader dnstap file reader structure.
+ * \param[out] d Unpacked dnstap protobuf.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ERROR
+ * \retval KNOT_EOF
+ * \retval KNOT_ENOMEM
+ */
+int dt_reader_read(dt_reader_t *reader, Dnstap__Dnstap **d);
+
+/*!
+ * \brief free the frame allocated by dt_read_data.
+ *
+ * \param reader Dnstap reader context.
+ * \param d The frame to be freed.
+ */
+void dt_reader_free_frame(dt_reader_t *reader, Dnstap__Dnstap **d);
diff --git a/src/contrib/dnstap/writer.c b/src/contrib/dnstap/writer.c
new file mode 100644
index 0000000..03961c1
--- /dev/null
+++ b/src/contrib/dnstap/writer.c
@@ -0,0 +1,120 @@
+/* Copyright (C) 2014 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libknot/errcode.h"
+
+#include "contrib/dnstap/dnstap.h"
+#include "contrib/dnstap/writer.h"
+
+dt_writer_t* dt_writer_create(const char *file_path, const char *version)
+{
+ struct fstrm_file_options *fopt = NULL;
+ struct fstrm_writer_options *wopt = NULL;
+ dt_writer_t *writer = NULL;
+ fstrm_res res;
+
+ writer = calloc(1, sizeof(dt_writer_t));
+ if (writer == NULL) {
+ goto fail;
+ }
+
+ // Set "version".
+ if (version != NULL) {
+ writer->len_version = strlen(version);
+ writer->version = strdup(version);
+ if (!writer->version) {
+ goto fail;
+ }
+ }
+
+ // Open writer.
+ fopt = fstrm_file_options_init();
+ fstrm_file_options_set_file_path(fopt, file_path);
+ wopt = fstrm_writer_options_init();
+ fstrm_writer_options_add_content_type(wopt,
+ (const uint8_t *) DNSTAP_CONTENT_TYPE,
+ strlen(DNSTAP_CONTENT_TYPE));
+ writer->fw = fstrm_file_writer_init(fopt, wopt);
+ fstrm_file_options_destroy(&fopt);
+ fstrm_writer_options_destroy(&wopt);
+ if (writer->fw == NULL) {
+ goto fail;
+ }
+
+ res = fstrm_writer_open(writer->fw);
+ if (res != fstrm_res_success) {
+ goto fail;
+ }
+
+ return writer;
+fail:
+ dt_writer_free(writer);
+ return NULL;
+}
+
+void dt_writer_free(dt_writer_t *writer)
+{
+ if (writer == NULL) {
+ return;
+ }
+
+ fstrm_writer_destroy(&writer->fw);
+ free(writer->version);
+ free(writer);
+}
+
+int dt_writer_write(dt_writer_t *writer, const ProtobufCMessage *msg)
+{
+ Dnstap__Dnstap dnstap = DNSTAP__DNSTAP__INIT;
+ size_t len;
+ uint8_t *data;
+
+ if (writer->fw == NULL) {
+ return KNOT_EOK;
+ }
+
+ // Only handle dnstap/Message.
+ assert(msg->descriptor == &dnstap__message__descriptor);
+
+ // Fill out 'dnstap'.
+ if (writer->version) {
+ dnstap.version.data = writer->version;
+ dnstap.version.len = writer->len_version;
+ dnstap.has_version = 1;
+ }
+ dnstap.type = DNSTAP__DNSTAP__TYPE__MESSAGE;
+ dnstap.message = (Dnstap__Message *)msg;
+
+ // Serialize the dnstap frame.
+ if (!dt_pack(&dnstap, &data, &len)) {
+ return KNOT_ENOMEM;
+ }
+
+ // Write the dnstap frame to the output stream.
+ if (fstrm_writer_write(writer->fw, data, len) != fstrm_res_success) {
+ return KNOT_ERROR;
+ }
+
+ // Cleanup.
+ free(data);
+
+ return KNOT_EOK;
+}
diff --git a/src/contrib/dnstap/writer.h b/src/contrib/dnstap/writer.h
new file mode 100644
index 0000000..e6928c5
--- /dev/null
+++ b/src/contrib/dnstap/writer.h
@@ -0,0 +1,71 @@
+/* Copyright (C) 2014 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/>.
+ */
+
+/*!
+ * \author Robert Edmonds <edmonds@fsi.io>
+ *
+ * \brief Dnstap file writer.
+ */
+
+#pragma once
+
+#include <fstrm.h>
+#include <protobuf-c/protobuf-c.h>
+
+/*! \brief Structure for dnstap file writer. */
+typedef struct {
+ /*!< Output writer. */
+ struct fstrm_writer *fw;
+
+ /*!< dnstap "version" field. */
+ void *version;
+
+ /*!< length of dnstap "version" field. */
+ size_t len_version;
+} dt_writer_t;
+
+/*!
+ * \brief Creates dnstap file writer structure.
+ *
+ * \param file_path Name of file to write output to.
+ * \param version Version string of software. May be NULL.
+ *
+ * \retval writer if success.
+ * \retval NULL if error.
+ */
+dt_writer_t* dt_writer_create(const char *file_path, const char *version);
+
+/*!
+ * \brief Finish writing dnstap file writer and free resources.
+ *
+ * \param writer dnstap file writer structure.
+ */
+void dt_writer_free(dt_writer_t *writer);
+
+/*!
+ * \brief Write a protobuf to the dnstap file writer.
+ *
+ * Supported protobuf types for the 'msg' parameter:
+ * \c Dnstap__Message
+ *
+ * \param writer dnstap file writer structure.
+ * \param msg dnstap protobuf. Must be a supported type.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EINVAL
+ * \retval KNOT_ENOMEM
+ */
+int dt_writer_write(dt_writer_t *writer, const ProtobufCMessage *msg);