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;