2 * Portions Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
3 * Portions Copyright (C) 2001 Internet Software Consortium.
4 * Portions Copyright (C) 2001 Nominum, Inc.
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
12 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 /* $Id: ccmsg.c,v 1.4.2.1 2004/03/09 06:12:25 marka Exp $ */
24 #include <isc/result.h>
28 #include <isccc/events.h>
29 #include <isccc/ccmsg.h>
31 #define CCMSG_MAGIC ISC_MAGIC('C', 'C', 'm', 's')
32 #define VALID_CCMSG(foo) ISC_MAGIC_VALID(foo, CCMSG_MAGIC)
34 static void recv_length(isc_task_t *, isc_event_t *);
35 static void recv_message(isc_task_t *, isc_event_t *);
39 recv_length(isc_task_t *task, isc_event_t *ev_in) {
40 isc_socketevent_t *ev = (isc_socketevent_t *)ev_in;
42 isccc_ccmsg_t *ccmsg = ev_in->ev_arg;
46 INSIST(VALID_CCMSG(ccmsg));
50 if (ev->result != ISC_R_SUCCESS) {
51 ccmsg->result = ev->result;
58 ccmsg->size = ntohl(ccmsg->size);
59 if (ccmsg->size == 0) {
60 ccmsg->result = ISC_R_UNEXPECTEDEND;
63 if (ccmsg->size > ccmsg->maxsize) {
64 ccmsg->result = ISC_R_RANGE;
68 region.base = isc_mem_get(ccmsg->mctx, ccmsg->size);
69 region.length = ccmsg->size;
70 if (region.base == NULL) {
71 ccmsg->result = ISC_R_NOMEMORY;
75 isc_buffer_init(&ccmsg->buffer, region.base, region.length);
76 result = isc_socket_recv(ccmsg->sock, ®ion, 0,
77 task, recv_message, ccmsg);
78 if (result != ISC_R_SUCCESS) {
79 ccmsg->result = result;
83 isc_event_free(&ev_in);
87 isc_task_send(ccmsg->task, &dev);
89 isc_event_free(&ev_in);
94 recv_message(isc_task_t *task, isc_event_t *ev_in) {
95 isc_socketevent_t *ev = (isc_socketevent_t *)ev_in;
97 isccc_ccmsg_t *ccmsg = ev_in->ev_arg;
101 INSIST(VALID_CCMSG(ccmsg));
105 if (ev->result != ISC_R_SUCCESS) {
106 ccmsg->result = ev->result;
110 ccmsg->result = ISC_R_SUCCESS;
111 isc_buffer_add(&ccmsg->buffer, ev->n);
112 ccmsg->address = ev->address;
115 isc_task_send(ccmsg->task, &dev);
117 isc_event_free(&ev_in);
121 isccc_ccmsg_init(isc_mem_t *mctx, isc_socket_t *sock, isccc_ccmsg_t *ccmsg) {
122 REQUIRE(mctx != NULL);
123 REQUIRE(sock != NULL);
124 REQUIRE(ccmsg != NULL);
126 ccmsg->magic = CCMSG_MAGIC;
128 ccmsg->buffer.base = NULL;
129 ccmsg->buffer.length = 0;
130 ccmsg->maxsize = 4294967295U; /* Largest message possible. */
133 ccmsg->task = NULL; /* None yet. */
134 ccmsg->result = ISC_R_UNEXPECTED; /* None yet. */
136 * Should probably initialize the event here, but it can wait.
142 isccc_ccmsg_setmaxsize(isccc_ccmsg_t *ccmsg, unsigned int maxsize) {
143 REQUIRE(VALID_CCMSG(ccmsg));
145 ccmsg->maxsize = maxsize;
150 isccc_ccmsg_readmessage(isccc_ccmsg_t *ccmsg,
151 isc_task_t *task, isc_taskaction_t action, void *arg)
156 REQUIRE(VALID_CCMSG(ccmsg));
157 REQUIRE(task != NULL);
158 REQUIRE(ccmsg->task == NULL); /* not currently in use */
160 if (ccmsg->buffer.base != NULL) {
161 isc_mem_put(ccmsg->mctx, ccmsg->buffer.base,
162 ccmsg->buffer.length);
163 ccmsg->buffer.base = NULL;
164 ccmsg->buffer.length = 0;
168 ccmsg->action = action;
170 ccmsg->result = ISC_R_UNEXPECTED; /* unknown right now */
172 ISC_EVENT_INIT(&ccmsg->event, sizeof(isc_event_t), 0, 0,
173 ISCCC_EVENT_CCMSG, action, arg, ccmsg,
176 region.base = (unsigned char *)&ccmsg->size;
177 region.length = 4; /* isc_uint32_t */
178 result = isc_socket_recv(ccmsg->sock, ®ion, 0,
179 ccmsg->task, recv_length, ccmsg);
181 if (result != ISC_R_SUCCESS)
188 isccc_ccmsg_cancelread(isccc_ccmsg_t *ccmsg) {
189 REQUIRE(VALID_CCMSG(ccmsg));
191 isc_socket_cancel(ccmsg->sock, NULL, ISC_SOCKCANCEL_RECV);
196 isccc_ccmsg_freebuffer(isccc_ccmsg_t *ccmsg) {
197 REQUIRE(VALID_CCMSG(ccmsg));
199 if (ccmsg->buffer.base == NULL)
202 isc_mem_put(ccmsg->mctx, ccmsg->buffer.base, ccmsg->buffer.length);
203 ccmsg->buffer.base = NULL;
204 ccmsg->buffer.length = 0;
209 isccc_ccmsg_invalidate(isccc_ccmsg_t *ccmsg) {
210 REQUIRE(VALID_CCMSG(ccmsg));
214 if (ccmsg->buffer.base != NULL) {
215 isc_mem_put(ccmsg->mctx, ccmsg->buffer.base,
216 ccmsg->buffer.length);
217 ccmsg->buffer.base = NULL;
218 ccmsg->buffer.length = 0;