f7c82e406e
1. The isc__nm_tcp_send() and isc__nm_tcp_read() was not checking whether the socket was still alive and scheduling reads/sends on closed socket. 2. The isc_nm_read(), isc_nm_send() and isc_nm_resumeread() have been changed to always return the error conditions via the callbacks, so they always succeed. This applies to all protocols (UDP, TCP and TCPDNS).
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*
|
|
* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
|
|
*
|
|
* See the COPYRIGHT file distributed with this work for additional
|
|
* information regarding copyright ownership.
|
|
*
|
|
* Portions Copyright (C) 2001 Nominum, Inc.
|
|
*
|
|
* Permission to use, copy, modify, and/or 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 AND NOMINUM 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.
|
|
*/
|
|
|
|
#ifndef ISCCC_CCMSG_H
|
|
#define ISCCC_CCMSG_H 1
|
|
|
|
/*! \file isccc/ccmsg.h */
|
|
|
|
#include <inttypes.h>
|
|
|
|
#include <isc/buffer.h>
|
|
#include <isc/lang.h>
|
|
#include <isc/netmgr.h>
|
|
#include <isc/sockaddr.h>
|
|
|
|
/*% ISCCC Message Structure */
|
|
typedef struct isccc_ccmsg {
|
|
/* private (don't touch!) */
|
|
unsigned int magic;
|
|
uint32_t size;
|
|
bool length_received;
|
|
isc_buffer_t * buffer;
|
|
unsigned int maxsize;
|
|
isc_mem_t * mctx;
|
|
isc_nmhandle_t *handle;
|
|
isc_nm_cb_t cb;
|
|
void * cbarg;
|
|
bool reading;
|
|
/* public (read-only) */
|
|
isc_result_t result;
|
|
} isccc_ccmsg_t;
|
|
|
|
ISC_LANG_BEGINDECLS
|
|
|
|
void
|
|
isccc_ccmsg_init(isc_mem_t *mctx, isc_nmhandle_t *handle, isccc_ccmsg_t *ccmsg);
|
|
/*%
|
|
* Associate a cc message state with a given memory context and
|
|
* netmgr handle. (Note that the caller must hold a reference to
|
|
* the handle during asynchronous ccmsg operations; the ccmsg code
|
|
* does not hold the reference itself.)
|
|
*
|
|
* Requires:
|
|
*
|
|
*\li "mctx" be a valid memory context.
|
|
*
|
|
*\li "handle" be a netmgr handle for a stream socket.
|
|
*
|
|
*\li "ccmsg" be non-NULL and an uninitialized or invalidated structure.
|
|
*
|
|
* Ensures:
|
|
*
|
|
*\li "ccmsg" is a valid structure.
|
|
*/
|
|
|
|
void
|
|
isccc_ccmsg_setmaxsize(isccc_ccmsg_t *ccmsg, unsigned int maxsize);
|
|
/*%
|
|
* Set the maximum packet size to "maxsize"
|
|
*
|
|
* Requires:
|
|
*
|
|
*\li "ccmsg" be valid.
|
|
*
|
|
*\li 512 <= "maxsize" <= 4294967296
|
|
*/
|
|
|
|
void
|
|
isccc_ccmsg_readmessage(isccc_ccmsg_t *ccmsg, isc_nm_cb_t cb, void *cbarg);
|
|
/*%
|
|
* Schedule an event to be delivered when a command channel message is
|
|
* readable, or when an error occurs on the socket.
|
|
*
|
|
* Requires:
|
|
*
|
|
*\li "ccmsg" be valid.
|
|
*
|
|
* Notes:
|
|
*
|
|
*\li The event delivered is a fully generic event. It will contain no
|
|
* actual data. The sender will be a pointer to the isccc_ccmsg_t.
|
|
* The result code inside that structure should be checked to see
|
|
* what the final result was.
|
|
*/
|
|
|
|
void
|
|
isccc_ccmsg_cancelread(isccc_ccmsg_t *ccmsg);
|
|
/*%
|
|
* Cancel a readmessage() call. The event will still be posted with a
|
|
* CANCELED result code.
|
|
*
|
|
* Requires:
|
|
*
|
|
*\li "ccmsg" be valid.
|
|
*/
|
|
|
|
void
|
|
isccc_ccmsg_invalidate(isccc_ccmsg_t *ccmsg);
|
|
/*%
|
|
* Clean up all allocated state, and invalidate the structure.
|
|
*
|
|
* Requires:
|
|
*
|
|
*\li "ccmsg" be valid.
|
|
*
|
|
* Ensures:
|
|
*
|
|
*\li "ccmsg" is invalidated and disassociated with all memory contexts,
|
|
* sockets, etc.
|
|
*/
|
|
|
|
ISC_LANG_ENDDECLS
|
|
|
|
#endif /* ISCCC_CCMSG_H */
|