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| -rw-r--r-- | external/unbound/dnstap/dnstap.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/external/unbound/dnstap/dnstap.h b/external/unbound/dnstap/dnstap.h new file mode 100644 index 000000000..d9121df7d --- /dev/null +++ b/external/unbound/dnstap/dnstap.h @@ -0,0 +1,188 @@ +/* dnstap support for Unbound */ + +/* + * Copyright (c) 2013-2014, Farsight Security, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the copyright holder nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef UNBOUND_DNSTAP_H +#define UNBOUND_DNSTAP_H + +#include "dnstap/dnstap_config.h" + +#ifdef USE_DNSTAP + +struct config_file; +struct fstrm_io; +struct fstrm_queue; +struct sldns_buffer; + +struct dt_env { + /** dnstap I/O socket */ + struct fstrm_io *fio; + + /** dnstap I/O queue */ + struct fstrm_queue *fq; + + /** dnstap "identity" field, NULL if disabled */ + char *identity; + + /** dnstap "version" field, NULL if disabled */ + char *version; + + /** length of "identity" field */ + unsigned len_identity; + + /** length of "version" field */ + unsigned len_version; + + /** whether to log Message/RESOLVER_QUERY */ + unsigned log_resolver_query_messages : 1; + /** whether to log Message/RESOLVER_RESPONSE */ + unsigned log_resolver_response_messages : 1; + /** whether to log Message/CLIENT_QUERY */ + unsigned log_client_query_messages : 1; + /** whether to log Message/CLIENT_RESPONSE */ + unsigned log_client_response_messages : 1; + /** whether to log Message/FORWARDER_QUERY */ + unsigned log_forwarder_query_messages : 1; + /** whether to log Message/FORWARDER_RESPONSE */ + unsigned log_forwarder_response_messages : 1; +}; + +/** + * Create dnstap environment object. Afterwards, call dt_apply_cfg() to fill in + * the config variables and dt_init() to fill in the per-worker state. Each + * worker needs a copy of this object but with its own I/O queue (the fq field + * of the structure) to ensure lock-free access to its own per-worker circular + * queue. Duplicate the environment object if more than one worker needs to + * share access to the dnstap I/O socket. + * @param socket_path: path to dnstap logging socket, must be non-NULL. + * @param num_workers: number of worker threads, must be > 0. + * @return dt_env object, NULL on failure. + */ +struct dt_env * +dt_create(const char *socket_path, unsigned num_workers); + +/** + * Apply config settings. + * @param env: dnstap environment object. + * @param cfg: new config settings. + */ +void +dt_apply_cfg(struct dt_env *env, struct config_file *cfg); + +/** + * Initialize per-worker state in dnstap environment object. + * @param env: dnstap environment object to initialize, created with dt_create(). + * @return: true on success, false on failure. + */ +int +dt_init(struct dt_env *env); + +/** + * Delete dnstap environment object. Closes dnstap I/O socket and deletes all + * per-worker I/O queues. + */ +void +dt_delete(struct dt_env *env); + +/** + * Create and send a new dnstap "Message" event of type CLIENT_QUERY. + * @param env: dnstap environment object. + * @param qsock: address/port of client. + * @param cptype: comm_udp or comm_tcp. + * @param qmsg: query message. + */ +void +dt_msg_send_client_query(struct dt_env *env, + struct sockaddr_storage *qsock, + enum comm_point_type cptype, + struct sldns_buffer *qmsg); + +/** + * Create and send a new dnstap "Message" event of type CLIENT_RESPONSE. + * @param env: dnstap environment object. + * @param qsock: address/port of client. + * @param cptype: comm_udp or comm_tcp. + * @param rmsg: response message. + */ +void +dt_msg_send_client_response(struct dt_env *env, + struct sockaddr_storage *qsock, + enum comm_point_type cptype, + struct sldns_buffer *rmsg); + +/** + * Create and send a new dnstap "Message" event of type RESOLVER_QUERY or + * FORWARDER_QUERY. The type used is dependent on the value of the RD bit + * in the query header. + * @param env: dnstap environment object. + * @param rsock: address/port of server the query is being sent to. + * @param cptype: comm_udp or comm_tcp. + * @param zone: query zone. + * @param zone_len: length of zone. + * @param qmsg: query message. + */ +void +dt_msg_send_outside_query(struct dt_env *env, + struct sockaddr_storage *rsock, + enum comm_point_type cptype, + uint8_t *zone, size_t zone_len, + struct sldns_buffer *qmsg); + +/** + * Create and send a new dnstap "Message" event of type RESOLVER_RESPONSE or + * FORWARDER_RESPONSE. The type used is dependent on the value of the RD bit + * in the query header. + * @param env: dnstap environment object. + * @param rsock: address/port of server the response was received from. + * @param cptype: comm_udp or comm_tcp. + * @param zone: query zone. + * @param zone_len: length of zone. + * @param qbuf: outside_network's qbuf key. + * @param qbuf_len: length of outside_network's qbuf key. + * @param qtime: time query message was sent. + * @param rtime: time response message was sent. + * @param rmsg: response message. + */ +void +dt_msg_send_outside_response(struct dt_env *env, + struct sockaddr_storage *rsock, + enum comm_point_type cptype, + uint8_t *zone, size_t zone_len, + uint8_t *qbuf, size_t qbuf_len, + const struct timeval *qtime, + const struct timeval *rtime, + struct sldns_buffer *rmsg); + +#endif /* USE_DNSTAP */ + +#endif /* UNBOUND_DNSTAP_H */ |