2 * Portions Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
3 * Portions Copyright (C) 2001 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
11 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
12 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Portions Copyright (C) 2001 Nominum, Inc.
19 * Permission to use, copy, modify, and/or distribute this software for any
20 * purpose with or without fee is hereby granted, provided that the above
21 * copyright notice and this permission notice appear in all copies.
23 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
24 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
26 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
27 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
28 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
29 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
32 /* $Id: ccmsg.c,v 1.10 2007/08/28 07:20:43 tbox Exp $ */
39 #include <isc/result.h>
43 #include <isccc/events.h>
44 #include <isccc/ccmsg.h>
46 #define CCMSG_MAGIC ISC_MAGIC('C', 'C', 'm', 's')
47 #define VALID_CCMSG(foo) ISC_MAGIC_VALID(foo, CCMSG_MAGIC)
49 static void recv_length(isc_task_t
*, isc_event_t
*);
50 static void recv_message(isc_task_t
*, isc_event_t
*);
54 recv_length(isc_task_t
*task
, isc_event_t
*ev_in
) {
55 isc_socketevent_t
*ev
= (isc_socketevent_t
*)ev_in
;
57 isccc_ccmsg_t
*ccmsg
= ev_in
->ev_arg
;
61 INSIST(VALID_CCMSG(ccmsg
));
65 if (ev
->result
!= ISC_R_SUCCESS
) {
66 ccmsg
->result
= ev
->result
;
73 ccmsg
->size
= ntohl(ccmsg
->size
);
74 if (ccmsg
->size
== 0) {
75 ccmsg
->result
= ISC_R_UNEXPECTEDEND
;
78 if (ccmsg
->size
> ccmsg
->maxsize
) {
79 ccmsg
->result
= ISC_R_RANGE
;
83 region
.base
= isc_mem_get(ccmsg
->mctx
, ccmsg
->size
);
84 region
.length
= ccmsg
->size
;
85 if (region
.base
== NULL
) {
86 ccmsg
->result
= ISC_R_NOMEMORY
;
90 isc_buffer_init(&ccmsg
->buffer
, region
.base
, region
.length
);
91 result
= isc_socket_recv(ccmsg
->sock
, ®ion
, 0,
92 task
, recv_message
, ccmsg
);
93 if (result
!= ISC_R_SUCCESS
) {
94 ccmsg
->result
= result
;
98 isc_event_free(&ev_in
);
102 isc_task_send(ccmsg
->task
, &dev
);
104 isc_event_free(&ev_in
);
109 recv_message(isc_task_t
*task
, isc_event_t
*ev_in
) {
110 isc_socketevent_t
*ev
= (isc_socketevent_t
*)ev_in
;
112 isccc_ccmsg_t
*ccmsg
= ev_in
->ev_arg
;
116 INSIST(VALID_CCMSG(ccmsg
));
120 if (ev
->result
!= ISC_R_SUCCESS
) {
121 ccmsg
->result
= ev
->result
;
125 ccmsg
->result
= ISC_R_SUCCESS
;
126 isc_buffer_add(&ccmsg
->buffer
, ev
->n
);
127 ccmsg
->address
= ev
->address
;
130 isc_task_send(ccmsg
->task
, &dev
);
132 isc_event_free(&ev_in
);
136 isccc_ccmsg_init(isc_mem_t
*mctx
, isc_socket_t
*sock
, isccc_ccmsg_t
*ccmsg
) {
137 REQUIRE(mctx
!= NULL
);
138 REQUIRE(sock
!= NULL
);
139 REQUIRE(ccmsg
!= NULL
);
141 ccmsg
->magic
= CCMSG_MAGIC
;
143 ccmsg
->buffer
.base
= NULL
;
144 ccmsg
->buffer
.length
= 0;
145 ccmsg
->maxsize
= 4294967295U; /* Largest message possible. */
148 ccmsg
->task
= NULL
; /* None yet. */
149 ccmsg
->result
= ISC_R_UNEXPECTED
; /* None yet. */
151 * Should probably initialize the event here, but it can wait.
157 isccc_ccmsg_setmaxsize(isccc_ccmsg_t
*ccmsg
, unsigned int maxsize
) {
158 REQUIRE(VALID_CCMSG(ccmsg
));
160 ccmsg
->maxsize
= maxsize
;
165 isccc_ccmsg_readmessage(isccc_ccmsg_t
*ccmsg
,
166 isc_task_t
*task
, isc_taskaction_t action
, void *arg
)
171 REQUIRE(VALID_CCMSG(ccmsg
));
172 REQUIRE(task
!= NULL
);
173 REQUIRE(ccmsg
->task
== NULL
); /* not currently in use */
175 if (ccmsg
->buffer
.base
!= NULL
) {
176 isc_mem_put(ccmsg
->mctx
, ccmsg
->buffer
.base
,
177 ccmsg
->buffer
.length
);
178 ccmsg
->buffer
.base
= NULL
;
179 ccmsg
->buffer
.length
= 0;
183 ccmsg
->action
= action
;
185 ccmsg
->result
= ISC_R_UNEXPECTED
; /* unknown right now */
187 ISC_EVENT_INIT(&ccmsg
->event
, sizeof(isc_event_t
), 0, 0,
188 ISCCC_EVENT_CCMSG
, action
, arg
, ccmsg
,
191 region
.base
= (unsigned char *)&ccmsg
->size
;
192 region
.length
= 4; /* isc_uint32_t */
193 result
= isc_socket_recv(ccmsg
->sock
, ®ion
, 0,
194 ccmsg
->task
, recv_length
, ccmsg
);
196 if (result
!= ISC_R_SUCCESS
)
203 isccc_ccmsg_cancelread(isccc_ccmsg_t
*ccmsg
) {
204 REQUIRE(VALID_CCMSG(ccmsg
));
206 isc_socket_cancel(ccmsg
->sock
, NULL
, ISC_SOCKCANCEL_RECV
);
211 isccc_ccmsg_freebuffer(isccc_ccmsg_t
*ccmsg
) {
212 REQUIRE(VALID_CCMSG(ccmsg
));
214 if (ccmsg
->buffer
.base
== NULL
)
217 isc_mem_put(ccmsg
->mctx
, ccmsg
->buffer
.base
, ccmsg
->buffer
.length
);
218 ccmsg
->buffer
.base
= NULL
;
219 ccmsg
->buffer
.length
= 0;
224 isccc_ccmsg_invalidate(isccc_ccmsg_t
*ccmsg
) {
225 REQUIRE(VALID_CCMSG(ccmsg
));
229 if (ccmsg
->buffer
.base
!= NULL
) {
230 isc_mem_put(ccmsg
->mctx
, ccmsg
->buffer
.base
,
231 ccmsg
->buffer
.length
);
232 ccmsg
->buffer
.base
= NULL
;
233 ccmsg
->buffer
.length
= 0;