2 * util/netevent.h - event notification
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39 * This file contains event notification functions.
41 * There are three types of communication points
42 * o UDP socket - perthread buffer.
43 * o TCP-accept socket - array of TCP-sockets, socketcount.
44 * o TCP socket - own buffer, parent-TCPaccept, read/write state,
45 * number of bytes read/written, timeout.
47 * There are sockets aimed towards our clients and towards the internet.
48 * o frontside - aimed towards our clients, queries come in, answers back.
49 * o behind - aimed towards internet, to the authoritative DNS servers.
51 * Several event types are available:
52 * o comm_base - for thread safety of the comm points, one per thread.
53 * o comm_point - udp and tcp networking, with callbacks.
54 * o comm_timer - a timeout with callback.
55 * o comm_signal - callbacks when signal is caught.
56 * o comm_reply - holds reply info during networking callback.
63 #include "dnscrypt/dnscrypt.h"
64 #ifdef HAVE_NGHTTP2_NGHTTP2_H
65 #include <nghttp2/nghttp2.h>
77 /* internal event notification data storage structure. */
78 struct internal_event;
80 struct internal_timer; /* A sub struct of the comm_timer super struct */
84 /** callback from communication point function type */
85 typedef int comm_point_callback_type(struct comm_point*, void*, int,
88 /** to pass no_error to callback function */
89 #define NETEVENT_NOERROR 0
90 /** to pass closed connection to callback function */
91 #define NETEVENT_CLOSED -1
92 /** to pass timeout happened to callback function */
93 #define NETEVENT_TIMEOUT -2
94 /** to pass fallback from capsforID to callback function; 0x20 failed */
95 #define NETEVENT_CAPSFAIL -3
96 /** to pass done transfer to callback function; http file is complete */
97 #define NETEVENT_DONE -4
99 /** timeout to slow accept calls when not possible, in msec. */
100 #define NETEVENT_SLOW_ACCEPT_TIME 2000
103 * A communication point dispatcher. Thread specific.
106 /** behind the scenes structure. with say libevent info. alloced */
107 struct internal_base* eb;
108 /** callback to stop listening on accept sockets,
109 * performed when accept() will not function properly */
110 void (*stop_accept)(void*);
111 /** callback to start listening on accept sockets, performed
112 * after stop_accept() then a timeout has passed. */
113 void (*start_accept)(void*);
114 /** user argument for stop_accept and start_accept functions */
119 * Reply information for a communication point.
122 /** the comm_point with fd to send reply on to. */
123 struct comm_point* c;
124 /** the address (for UDP based communication) */
125 struct sockaddr_storage addr;
126 /** length of address */
128 /** return type 0 (none), 4(IP4), 6(IP6) */
130 /* DnsCrypt context */
132 uint8_t client_nonce[crypto_box_HALF_NONCEBYTES];
133 uint8_t nmkey[crypto_box_BEFORENMBYTES];
134 const dnsccert *dnsc_cert;
137 /** the return source interface data */
140 struct in6_pktinfo v6info;
143 struct in_pktinfo v4info;
144 #elif defined(IP_RECVDSTADDR)
145 struct in_addr v4addr;
148 /** variable with return source data */
150 /** max udp size for udp packets */
155 * Communication point to the network
156 * These behaviours can be accomplished by setting the flags
157 * and passing return values from the callback.
158 * udp frontside: called after readdone. sendafter.
159 * tcp frontside: called readdone, sendafter. close.
160 * udp behind: called after readdone. No send after.
161 * tcp behind: write done, read done, then called. No send after.
164 /** behind the scenes structure, with say libevent info. alloced. */
165 struct internal_event* ev;
167 /** file descriptor for communication point */
170 /** timeout (NULL if it does not). Malloced. */
171 struct timeval* timeout;
173 /** buffer pointer. Either to perthread, or own buffer or NULL */
174 struct sldns_buffer* buffer;
176 /* -------- TCP Handler -------- */
177 /** Read/Write state for TCP */
179 /** The current read/write count for TCP */
180 size_t tcp_byte_count;
181 /** parent communication point (for TCP sockets) */
182 struct comm_point* tcp_parent;
183 /** sockaddr from peer, for TCP handlers */
184 struct comm_reply repinfo;
186 /* -------- TCP Accept -------- */
187 /** the number of TCP handlers for this tcp-accept socket */
189 /** current number of tcp handler in-use for this accept socket */
191 /** malloced array of tcp handlers for a tcp-accept,
192 of size max_tcp_count. */
193 struct comm_point** tcp_handlers;
194 /** linked list of free tcp_handlers to use for new queries.
195 For tcp_accept the first entry, for tcp_handlers the next one. */
196 struct comm_point* tcp_free;
198 /* -------- SSL TCP DNS ------- */
199 /** the SSL object with rw bio (owned) or for commaccept ctx ref */
201 /** handshake state for init and renegotiate */
203 /** no handshake, it has been done */
204 comm_ssl_shake_none = 0,
205 /** ssl initial handshake wants to read */
207 /** ssl initial handshake wants to write */
208 comm_ssl_shake_write,
209 /** ssl_write wants to read */
210 comm_ssl_shake_hs_read,
211 /** ssl_read wants to write */
212 comm_ssl_shake_hs_write
215 /* -------- HTTP ------- */
216 /** Do not allow connection to use HTTP version lower than this. 0=no
219 http_version_none = 0,
224 /* -------- HTTP/1.1 ------- */
225 /** Currently reading in http headers */
227 /** Currently reading in chunk headers, 0=not, 1=firstline, 2=unused
228 * (more lines), 3=trailer headers after chunk */
229 int http_in_chunk_headers;
230 /** chunked transfer */
232 /** http temp buffer (shared buffer for temporary work) */
233 struct sldns_buffer* http_temp;
234 /** http stored content in buffer */
236 /* -------- HTTP/2 ------- */
238 struct http2_session* h2_session;
239 /** set to 1 if h2 is negotiated to be used (using alpn) */
241 /** stream currently being handled */
242 struct http2_stream* h2_stream;
243 /** maximum allowed query buffer size, per stream */
244 size_t http2_stream_max_qbuffer_size;
245 /** maximum number of HTTP/2 streams per connection. Send in HTTP/2
247 uint32_t http2_max_streams;
249 /* -------- dnstap ------- */
250 /** the dnstap environment */
251 struct dt_env* dtenv;
253 /** is this a UDP, TCP-accept or TCP socket. */
254 enum comm_point_type {
255 /** UDP socket - handle datagrams. */
257 /** TCP accept socket - only creates handlers if readable. */
259 /** TCP handler socket - handle byteperbyte readwrite. */
261 /** HTTP handler socket */
263 /** AF_UNIX socket - for internal commands. */
265 /** raw - not DNS format - for pipe readers and writers */
268 /** variable with type of socket, UDP,TCP-accept,TCP,pipe */
271 /* ---------- Behaviour ----------- */
272 /** if set the connection is NOT closed on delete. */
275 /** if set, the connection is closed on error, on timeout,
276 and after read/write completes. No callback is done. */
279 /** if set, read/write completes:
280 read/write state of tcp is toggled.
281 buffer reset/bytecount reset.
283 So that when that is done the callback is called. */
284 int tcp_do_toggle_rw;
286 /** timeout in msec for TCP wait times for this connection */
287 int tcp_timeout_msec;
289 /** if set, tcp keepalive is enabled on this connection */
292 /** if set, checks for pending error from nonblocking connect() call.*/
293 int tcp_check_nb_connect;
295 /** if set, check for connection limit on tcp accept. */
296 struct tcl_list* tcp_conn_limit;
297 /** the entry for the connection. */
298 struct tcl_addr* tcl_addr;
300 /** the structure to keep track of open requests on this channel */
301 struct tcp_req_info* tcp_req_info;
303 #ifdef USE_MSG_FASTOPEN
304 /** used to track if the sendto() call should be done when using TFO. */
309 /** Is this a dnscrypt channel */
311 /** encrypted buffer pointer. Either to perthread, or own buffer or NULL */
312 struct sldns_buffer* dnscrypt_buffer;
314 /** number of queries outstanding on this socket, used by
315 * outside network for udp ports */
318 /** callback when done.
319 tcp_accept does not get called back, is NULL then.
320 If a timeout happens, callback with timeout=1 is called.
321 If an error happens, callback is called with error set
322 nonzero. If not NETEVENT_NOERROR, it is an errno value.
323 If the connection is closed (by remote end) then the
324 callback is called with error set to NETEVENT_CLOSED=-1.
325 If a timeout happens on the connection, the error is set to
327 The reply_info can be copied if the reply needs to happen at a
328 later time. It consists of a struct with commpoint and address.
329 It can be passed to a msg send routine some time later.
330 Note the reply information is temporary and must be copied.
331 NULL is passed for_reply info, in cases where error happened.
334 int my_callback(struct comm_point* c, void* my_arg, int error,
335 struct comm_reply *reply_info);
337 if the routine returns 0, nothing is done.
338 Notzero, the buffer will be sent back to client.
339 For UDP this is done without changing the commpoint.
340 In TCP it sets write state.
342 comm_point_callback_type* callback;
343 /** argument to pass to callback. */
348 * Structure only for making timeout events.
351 /** the internal event stuff (derived) */
352 struct internal_timer* ev_timer;
354 /** callback function, takes user arg only */
355 void (*callback)(void*);
357 /** callback user argument */
362 * Structure only for signal events.
365 /** the communication base */
366 struct comm_base* base;
368 /** the internal event stuff */
369 struct internal_signal* ev_signal;
371 /** callback function, takes signal number and user arg */
372 void (*callback)(int, void*);
374 /** callback user argument */
379 * Create a new comm base.
380 * @param sigs: if true it attempts to create a default loop for
382 * @return: the new comm base. NULL on error.
384 struct comm_base* comm_base_create(int sigs);
387 * Create comm base that uses the given ub_event_base (underlying pluggable
388 * event mechanism pointer).
389 * @param base: underlying pluggable event base.
390 * @return: the new comm base. NULL on error.
392 struct comm_base* comm_base_create_event(struct ub_event_base* base);
395 * Delete comm base structure but not the underlying lib event base.
396 * All comm points must have been deleted.
397 * @param b: the base to delete.
399 void comm_base_delete_no_base(struct comm_base* b);
402 * Destroy a comm base.
403 * All comm points must have been deleted.
404 * @param b: the base to delete.
406 void comm_base_delete(struct comm_base* b);
409 * Obtain two pointers. The pointers never change (until base_delete()).
410 * The pointers point to time values that are updated regularly.
411 * @param b: the communication base that will update the time values.
412 * @param tt: pointer to time in seconds is returned.
413 * @param tv: pointer to time in microseconds is returned.
415 void comm_base_timept(struct comm_base* b, time_t** tt, struct timeval** tv);
418 * Dispatch the comm base events.
419 * @param b: the communication to perform.
421 void comm_base_dispatch(struct comm_base* b);
424 * Exit from dispatch loop.
425 * @param b: the communication base that is in dispatch().
427 void comm_base_exit(struct comm_base* b);
430 * Set the slow_accept mode handlers. You can not provide these if you do
431 * not perform accept() calls.
432 * @param b: comm base
433 * @param stop_accept: function that stops listening to accept fds.
434 * @param start_accept: function that resumes listening to accept fds.
435 * @param arg: callback arg to pass to the functions.
437 void comm_base_set_slow_accept_handlers(struct comm_base* b,
438 void (*stop_accept)(void*), void (*start_accept)(void*), void* arg);
441 * Access internal data structure (for util/tube.c on windows)
442 * @param b: comm base
443 * @return ub_event_base.
445 struct ub_event_base* comm_base_internal(struct comm_base* b);
448 * Create an UDP comm point. Calls malloc.
449 * setups the structure with the parameters you provide.
450 * @param base: in which base to alloc the commpoint.
451 * @param fd : file descriptor of open UDP socket.
452 * @param buffer: shared buffer by UDP sockets from this thread.
453 * @param callback: callback function pointer.
454 * @param callback_arg: will be passed to your callback function.
455 * @return: returns the allocated communication point. NULL on error.
456 * Sets timeout to NULL. Turns off TCP options.
458 struct comm_point* comm_point_create_udp(struct comm_base* base,
459 int fd, struct sldns_buffer* buffer,
460 comm_point_callback_type* callback, void* callback_arg);
463 * Create an UDP with ancillary data comm point. Calls malloc.
464 * Uses recvmsg instead of recv to get udp message.
465 * setups the structure with the parameters you provide.
466 * @param base: in which base to alloc the commpoint.
467 * @param fd : file descriptor of open UDP socket.
468 * @param buffer: shared buffer by UDP sockets from this thread.
469 * @param callback: callback function pointer.
470 * @param callback_arg: will be passed to your callback function.
471 * @return: returns the allocated communication point. NULL on error.
472 * Sets timeout to NULL. Turns off TCP options.
474 struct comm_point* comm_point_create_udp_ancil(struct comm_base* base,
475 int fd, struct sldns_buffer* buffer,
476 comm_point_callback_type* callback, void* callback_arg);
479 * Create a TCP listener comm point. Calls malloc.
480 * Setups the structure with the parameters you provide.
481 * Also Creates TCP Handlers, pre allocated for you.
482 * Uses the parameters you provide.
483 * @param base: in which base to alloc the commpoint.
484 * @param fd: file descriptor of open TCP socket set to listen nonblocking.
485 * @param num: becomes max_tcp_count, the routine allocates that
486 * many tcp handler commpoints.
487 * @param idle_timeout: TCP idle timeout in ms.
488 * @param harden_large_queries: whether query size should be limited.
489 * @param http_max_streams: maximum number of HTTP/2 streams per connection.
490 * @param http_endpoint: HTTP endpoint to service queries on
491 * @param tcp_conn_limit: TCP connection limit info.
492 * @param bufsize: size of buffer to create for handlers.
493 * @param spoolbuf: shared spool buffer for tcp_req_info structures.
494 * or NULL to not create those structures in the tcp handlers.
495 * @param port_type: the type of port we are creating a TCP listener for. Used
496 * to select handler type to use.
497 * @param callback: callback function pointer for TCP handlers.
498 * @param callback_arg: will be passed to your callback function.
499 * @return: returns the TCP listener commpoint. You can find the
500 * TCP handlers in the array inside the listener commpoint.
501 * returns NULL on error.
502 * Inits timeout to NULL. All handlers are on the free list.
504 struct comm_point* comm_point_create_tcp(struct comm_base* base,
505 int fd, int num, int idle_timeout, int harden_large_queries,
506 uint32_t http_max_streams, char* http_endpoint,
507 struct tcl_list* tcp_conn_limit,
508 size_t bufsize, struct sldns_buffer* spoolbuf,
509 enum listen_type port_type,
510 comm_point_callback_type* callback, void* callback_arg);
513 * Create an outgoing TCP commpoint. No file descriptor is opened, left at -1.
514 * @param base: in which base to alloc the commpoint.
515 * @param bufsize: size of buffer to create for handlers.
516 * @param callback: callback function pointer for the handler.
517 * @param callback_arg: will be passed to your callback function.
518 * @return: the commpoint or NULL on error.
520 struct comm_point* comm_point_create_tcp_out(struct comm_base* base,
521 size_t bufsize, comm_point_callback_type* callback, void* callback_arg);
524 * Create an outgoing HTTP commpoint. No file descriptor is opened, left at -1.
525 * @param base: in which base to alloc the commpoint.
526 * @param bufsize: size of buffer to create for handlers.
527 * @param callback: callback function pointer for the handler.
528 * @param callback_arg: will be passed to your callback function.
529 * @param temp: sldns buffer, shared between other http_out commpoints, for
530 * temporary data when performing callbacks.
531 * @return: the commpoint or NULL on error.
533 struct comm_point* comm_point_create_http_out(struct comm_base* base,
534 size_t bufsize, comm_point_callback_type* callback,
535 void* callback_arg, struct sldns_buffer* temp);
538 * Create commpoint to listen to a local domain file descriptor.
539 * @param base: in which base to alloc the commpoint.
540 * @param fd: file descriptor of open AF_UNIX socket set to listen nonblocking.
541 * @param bufsize: size of buffer to create for handlers.
542 * @param callback: callback function pointer for the handler.
543 * @param callback_arg: will be passed to your callback function.
544 * @return: the commpoint or NULL on error.
546 struct comm_point* comm_point_create_local(struct comm_base* base,
547 int fd, size_t bufsize,
548 comm_point_callback_type* callback, void* callback_arg);
551 * Create commpoint to listen to a local domain pipe descriptor.
552 * @param base: in which base to alloc the commpoint.
553 * @param fd: file descriptor.
554 * @param writing: true if you want to listen to writes, false for reads.
555 * @param callback: callback function pointer for the handler.
556 * @param callback_arg: will be passed to your callback function.
557 * @return: the commpoint or NULL on error.
559 struct comm_point* comm_point_create_raw(struct comm_base* base,
561 comm_point_callback_type* callback, void* callback_arg);
564 * Close a comm point fd.
565 * @param c: comm point to close.
567 void comm_point_close(struct comm_point* c);
570 * Close and deallocate (free) the comm point. If the comm point is
571 * a tcp-accept point, also its tcp-handler points are deleted.
572 * @param c: comm point to delete.
574 void comm_point_delete(struct comm_point* c);
577 * Send reply. Put message into commpoint buffer.
578 * @param repinfo: The reply info copied from a commpoint callback call.
580 void comm_point_send_reply(struct comm_reply* repinfo);
583 * Drop reply. Cleans up.
584 * @param repinfo: The reply info copied from a commpoint callback call.
586 void comm_point_drop_reply(struct comm_reply* repinfo);
589 * Send an udp message over a commpoint.
590 * @param c: commpoint to send it from.
591 * @param packet: what to send.
592 * @param addr: where to send it to.
593 * @param addrlen: length of addr.
594 * @return: false on a failure.
596 int comm_point_send_udp_msg(struct comm_point* c, struct sldns_buffer* packet,
597 struct sockaddr* addr, socklen_t addrlen);
600 * Stop listening for input on the commpoint. No callbacks will happen.
601 * @param c: commpoint to disable. The fd is not closed.
603 void comm_point_stop_listening(struct comm_point* c);
606 * Start listening again for input on the comm point.
607 * @param c: commpoint to enable again.
608 * @param newfd: new fd, or -1 to leave fd be.
609 * @param msec: timeout in milliseconds, or -1 for no (change to the) timeout.
612 void comm_point_start_listening(struct comm_point* c, int newfd, int msec);
615 * Stop listening and start listening again for reading or writing.
616 * @param c: commpoint
617 * @param rd: if true, listens for reading.
618 * @param wr: if true, listens for writing.
620 void comm_point_listen_for_rw(struct comm_point* c, int rd, int wr);
623 * Get size of memory used by comm point.
624 * For TCP handlers this includes subhandlers.
625 * For UDP handlers, this does not include the (shared) UDP buffer.
626 * @param c: commpoint.
627 * @return size in bytes.
629 size_t comm_point_get_mem(struct comm_point* c);
632 * create timer. Not active upon creation.
633 * @param base: event handling base.
634 * @param cb: callback function: void myfunc(void* myarg);
635 * @param cb_arg: user callback argument.
636 * @return: the new timer or NULL on error.
638 struct comm_timer* comm_timer_create(struct comm_base* base,
639 void (*cb)(void*), void* cb_arg);
642 * disable timer. Stops callbacks from happening.
643 * @param timer: to disable.
645 void comm_timer_disable(struct comm_timer* timer);
648 * reset timevalue for timer.
649 * @param timer: timer to (re)set.
650 * @param tv: when the timer should activate. if NULL timer is disabled.
652 void comm_timer_set(struct comm_timer* timer, struct timeval* tv);
656 * @param timer: to delete.
658 void comm_timer_delete(struct comm_timer* timer);
661 * see if timeout has been set to a value.
662 * @param timer: the timer to examine.
663 * @return: false if disabled or not set.
665 int comm_timer_is_set(struct comm_timer* timer);
668 * Get size of memory used by comm timer.
669 * @param timer: the timer to examine.
670 * @return size in bytes.
672 size_t comm_timer_get_mem(struct comm_timer* timer);
675 * Create a signal handler. Call signal_bind() later to bind to a signal.
676 * @param base: communication base to use.
677 * @param callback: called when signal is caught.
678 * @param cb_arg: user argument to callback
679 * @return: the signal struct or NULL on error.
681 struct comm_signal* comm_signal_create(struct comm_base* base,
682 void (*callback)(int, void*), void* cb_arg);
685 * Bind signal struct to catch a signal. A signle comm_signal can be bound
686 * to multiple signals, calling comm_signal_bind multiple times.
687 * @param comsig: the communication point, with callback information.
688 * @param sig: signal number.
689 * @return: true on success. false on error.
691 int comm_signal_bind(struct comm_signal* comsig, int sig);
694 * Delete the signal communication point.
695 * @param comsig: to delete.
697 void comm_signal_delete(struct comm_signal* comsig);
700 * perform accept(2) with error checking.
701 * @param c: commpoint with accept fd.
702 * @param addr: remote end returned here.
703 * @param addrlen: length of remote end returned here.
704 * @return new fd, or -1 on error.
705 * if -1, error message has been printed if necessary, simply drop
706 * out of the reading handler.
708 int comm_point_perform_accept(struct comm_point* c,
709 struct sockaddr_storage* addr, socklen_t* addrlen);
711 /**** internal routines ****/
714 * This routine is published for checks and tests, and is only used internally.
715 * handle libevent callback for udp comm point.
716 * @param fd: file descriptor.
717 * @param event: event bits from libevent:
718 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
719 * @param arg: the comm_point structure.
721 void comm_point_udp_callback(int fd, short event, void* arg);
724 * This routine is published for checks and tests, and is only used internally.
725 * handle libevent callback for udp ancillary data comm point.
726 * @param fd: file descriptor.
727 * @param event: event bits from libevent:
728 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
729 * @param arg: the comm_point structure.
731 void comm_point_udp_ancil_callback(int fd, short event, void* arg);
734 * This routine is published for checks and tests, and is only used internally.
735 * handle libevent callback for tcp accept comm point
736 * @param fd: file descriptor.
737 * @param event: event bits from libevent:
738 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
739 * @param arg: the comm_point structure.
741 void comm_point_tcp_accept_callback(int fd, short event, void* arg);
744 * This routine is published for checks and tests, and is only used internally.
745 * handle libevent callback for tcp data comm point
746 * @param fd: file descriptor.
747 * @param event: event bits from libevent:
748 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
749 * @param arg: the comm_point structure.
751 void comm_point_tcp_handle_callback(int fd, short event, void* arg);
754 * This routine is published for checks and tests, and is only used internally.
755 * handle libevent callback for tcp data comm point
756 * @param fd: file descriptor.
757 * @param event: event bits from libevent:
758 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
759 * @param arg: the comm_point structure.
761 void comm_point_http_handle_callback(int fd, short event, void* arg);
764 * HTTP2 session. HTTP2 related info per comm point.
766 struct http2_session {
767 /** first item in list of streams */
768 struct http2_stream* first_stream;
770 /** nghttp2 session */
771 nghttp2_session *session;
772 /** store nghttp2 callbacks for easy reuse */
773 nghttp2_session_callbacks* callbacks;
775 /** comm point containing buffer used to build answer in worker or
777 struct comm_point* c;
778 /** session is instructed to get dropped (comm port will be closed) */
780 /** postpone dropping the session, can be used to prevent dropping
781 * while being in a callback */
785 /** enum of HTTP status */
787 HTTP_STATUS_OK = 200,
788 HTTP_STATUS_BAD_REQUEST = 400,
789 HTTP_STATUS_NOT_FOUND = 404,
790 HTTP_STATUS_PAYLOAD_TOO_LARGE = 413,
791 HTTP_STATUS_URI_TOO_LONG = 414,
792 HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE = 415,
793 HTTP_STATUS_NOT_IMPLEMENTED = 501
797 * HTTP stream. Part of list of HTTP2 streams per session.
799 struct http2_stream {
800 /** next stream in list per session */
801 struct http2_stream* next;
802 /** previous stream in list per session */
803 struct http2_stream* prev;
804 /** HTTP2 stream ID is an unsigned 31-bit integer */
806 /** HTTP method used for this stream */
808 HTTP_METHOD_POST = 1,
810 HTTP_METHOD_UNSUPPORTED
812 /** message contains invalid content type */
813 int invalid_content_type;
814 /** message body content type */
815 size_t content_length;
816 /** HTTP response status */
817 enum http_status status;
818 /** request for non existing endpoint */
819 int invalid_endpoint;
820 /** query in request is too large */
822 /** buffer to store query into. Can't use session shared buffer as query
823 * can arrive in parts, intertwined with frames for other queries. */
824 struct sldns_buffer* qbuffer;
825 /** buffer to store response into. Can't use shared buffer as a next
826 * query read callback can overwrite it before it is send out. */
827 struct sldns_buffer* rbuffer;
828 /** mesh area containing mesh state */
829 struct mesh_area* mesh;
830 /** mesh state for query. Used to remove mesh reply before closing
832 struct mesh_state* mesh_state;
836 /** nghttp2 receive cb. Read from SSL connection into nghttp2 buffer */
837 ssize_t http2_recv_cb(nghttp2_session* session, uint8_t* buf,
838 size_t len, int flags, void* cb_arg);
839 /** nghttp2 send callback. Send from nghttp2 buffer to ssl socket */
840 ssize_t http2_send_cb(nghttp2_session* session, const uint8_t* buf,
841 size_t len, int flags, void* cb_arg);
842 /** nghttp2 callback on closing stream */
843 int http2_stream_close_cb(nghttp2_session* session, int32_t stream_id,
844 uint32_t error_code, void* cb_arg);
848 * Create new http2 stream
849 * @param stream_id: ID for stream to create.
850 * @return malloc'ed stream, NULL on error
852 struct http2_stream* http2_stream_create(int32_t stream_id);
855 * Add new stream to session linked list
856 * @param h2_session: http2 session to add stream to
857 * @param h2_stream: stream to add to session list
859 void http2_session_add_stream(struct http2_session* h2_session,
860 struct http2_stream* h2_stream);
862 /** Add mesh state to stream. To be able to remove mesh reply on stream closure
864 void http2_stream_add_meshstate(struct http2_stream* h2_stream,
865 struct mesh_area* mesh, struct mesh_state* m);
868 * This routine is published for checks and tests, and is only used internally.
869 * handle libevent callback for timer comm.
870 * @param fd: file descriptor (always -1).
871 * @param event: event bits from libevent:
872 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
873 * @param arg: the comm_timer structure.
875 void comm_timer_callback(int fd, short event, void* arg);
878 * This routine is published for checks and tests, and is only used internally.
879 * handle libevent callback for signal comm.
880 * @param fd: file descriptor (used for the signal number).
881 * @param event: event bits from libevent:
882 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
883 * @param arg: the internal commsignal structure.
885 void comm_signal_callback(int fd, short event, void* arg);
888 * This routine is published for checks and tests, and is only used internally.
889 * libevent callback for AF_UNIX fds
890 * @param fd: file descriptor.
891 * @param event: event bits from libevent:
892 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
893 * @param arg: the comm_point structure.
895 void comm_point_local_handle_callback(int fd, short event, void* arg);
898 * This routine is published for checks and tests, and is only used internally.
899 * libevent callback for raw fd access.
900 * @param fd: file descriptor.
901 * @param event: event bits from libevent:
902 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
903 * @param arg: the comm_point structure.
905 void comm_point_raw_handle_callback(int fd, short event, void* arg);
908 * This routine is published for checks and tests, and is only used internally.
909 * libevent callback for timeout on slow accept.
910 * @param fd: file descriptor.
911 * @param event: event bits from libevent:
912 * EV_READ, EV_WRITE, EV_SIGNAL, EV_TIMEOUT.
913 * @param arg: the comm_point structure.
915 void comm_base_handle_slow_accept(int fd, short event, void* arg);
919 * Callback for openssl BIO to on windows detect WSAEWOULDBLOCK and notify
920 * the winsock_event of this for proper TCP nonblocking implementation.
921 * @param c: comm_point, fd must be set its struct event is registered.
922 * @param ssl: openssl SSL, fd must be set so it has a bio.
924 void comm_point_tcp_win_bio_cb(struct comm_point* c, void* ssl);
928 * See if errno for tcp connect has to be logged or not. This uses errno
929 * @param addr: apart from checking errno, the addr is checked for ip4mapped
930 * and broadcast type, hence passed.
931 * @param addrlen: length of the addr parameter.
932 * @return true if it needs to be logged.
934 int tcp_connect_errno_needs_log(struct sockaddr* addr, socklen_t addrlen);
938 * True if the ssl handshake error has to be squelched from the logs
939 * @param err: the error returned by the openssl routine, ERR_get_error.
940 * This is a packed structure with elements that are examined.
941 * @return true if the error is squelched (not logged).
943 int squelch_err_ssl_handshake(unsigned long err);
946 #endif /* NET_EVENT_H */