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- /*
- * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1999-2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
- /* $Id: tcpmsg.h,v 1.16.18.2 2005/04/29 00:16:22 marka Exp $ */
-
- #ifndef DNS_TCPMSG_H
- #define DNS_TCPMSG_H 1
-
- /*! \file */
-
- #include <isc/buffer.h>
- #include <isc/lang.h>
- #include <isc/socket.h>
-
- typedef struct dns_tcpmsg {
- /* private (don't touch!) */
- unsigned int magic;
- isc_uint16_t size;
- isc_buffer_t buffer;
- unsigned int maxsize;
- isc_mem_t *mctx;
- isc_socket_t *sock;
- isc_task_t *task;
- isc_taskaction_t action;
- void *arg;
- isc_event_t event;
- /* public (read-only) */
- isc_result_t result;
- isc_sockaddr_t address;
- } dns_tcpmsg_t;
-
- ISC_LANG_BEGINDECLS
-
- void
- dns_tcpmsg_init(isc_mem_t *mctx, isc_socket_t *sock, dns_tcpmsg_t *tcpmsg);
- /*%<
- * Associate a tcp message state with a given memory context and
- * TCP socket.
- *
- * Requires:
- *
- *\li "mctx" and "sock" be non-NULL and valid types.
- *
- *\li "sock" be a read/write TCP socket.
- *
- *\li "tcpmsg" be non-NULL and an uninitialized or invalidated structure.
- *
- * Ensures:
- *
- *\li "tcpmsg" is a valid structure.
- */
-
- void
- dns_tcpmsg_setmaxsize(dns_tcpmsg_t *tcpmsg, unsigned int maxsize);
- /*%<
- * Set the maximum packet size to "maxsize"
- *
- * Requires:
- *
- *\li "tcpmsg" be valid.
- *
- *\li 512 <= "maxsize" <= 65536
- */
-
- isc_result_t
- dns_tcpmsg_readmessage(dns_tcpmsg_t *tcpmsg,
- isc_task_t *task, isc_taskaction_t action, void *arg);
- /*%<
- * Schedule an event to be delivered when a DNS message is readable, or
- * when an error occurs on the socket.
- *
- * Requires:
- *
- *\li "tcpmsg" be valid.
- *
- *\li "task", "taskaction", and "arg" be valid.
- *
- * Returns:
- *
- *\li ISC_R_SUCCESS -- no error
- *\li Anything that the isc_socket_recv() call can return. XXXMLG
- *
- * Notes:
- *
- *\li The event delivered is a fully generic event. It will contain no
- * actual data. The sender will be a pointer to the dns_tcpmsg_t.
- * The result code inside that structure should be checked to see
- * what the final result was.
- */
-
- void
- dns_tcpmsg_cancelread(dns_tcpmsg_t *tcpmsg);
- /*%<
- * Cancel a readmessage() call. The event will still be posted with a
- * CANCELED result code.
- *
- * Requires:
- *
- *\li "tcpmsg" be valid.
- */
-
- void
- dns_tcpmsg_keepbuffer(dns_tcpmsg_t *tcpmsg, isc_buffer_t *buffer);
- /*%<
- * If a dns buffer is to be kept between calls, this function marks the
- * internal state-machine buffer as invalid, and copies all the contents
- * of the state into "buffer".
- *
- * Requires:
- *
- *\li "tcpmsg" be valid.
- *
- *\li "buffer" be non-NULL.
- */
-
- void
- dns_tcpmsg_invalidate(dns_tcpmsg_t *tcpmsg);
- /*%<
- * Clean up all allocated state, and invalidate the structure.
- *
- * Requires:
- *
- *\li "tcpmsg" be valid.
- *
- * Ensures:
- *
- *\li "tcpmsg" is invalidated and disassociated with all memory contexts,
- * sockets, etc.
- */
-
- ISC_LANG_ENDDECLS
-
- #endif /* DNS_TCPMSG_H */
-