1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 APLOG_USE_MODULE(proxy_ajp);
21 static char *hex_table = "0123456789ABCDEF";
24 * Dump up to the first 1024 bytes on an AJP Message
26 * @param pool pool to allocate from
27 * @param msg AJP Message to dump
28 * @param err error string to display
29 * @return dump message
31 char * ajp_msg_dump(apr_pool_t *pool, ajp_msg_t *msg, char *err)
39 apr_size_t len = msg->len;
41 /* Display only first 1024 bytes */
44 rv = apr_palloc(pool, bl);
46 "ajp_msg_dump(): %s pos=%" APR_SIZE_T_FMT
47 " len=%" APR_SIZE_T_FMT " max=%" APR_SIZE_T_FMT "\n",
48 err, msg->pos, msg->len, msg->max_size);
51 for (i = 0; i < len; i += 16) {
54 for (j = 0; j < 16; j++) {
57 *current++ = hex_table[x >> 4];
58 *current++ = hex_table[x & 0x0f];
64 for (j = 0; j < 16; j++) {
67 if (x > 0x20 && x < 0x7F) {
77 "ajp_msg_dump(): %.4lx %s\n",
78 (unsigned long)i, line);
89 * Check a new AJP Message by looking at signature and return its size
91 * @param msg AJP Message to check
92 * @param len Pointer to returned len
93 * @return APR_SUCCESS or error
95 apr_status_t ajp_msg_check_header(ajp_msg_t *msg, apr_size_t *len)
97 apr_byte_t *head = msg->buf;
100 if (!((head[0] == 0x41 && head[1] == 0x42) ||
101 (head[0] == 0x12 && head[1] == 0x34))) {
103 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
104 "ajp_msg_check_header() got bad signature %02x%02x",
107 return AJP_EBAD_SIGNATURE;
110 msglen = ((head[2] & 0xff) << 8);
111 msglen += (head[3] & 0xFF);
113 if (msglen > msg->max_size) {
114 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
115 "ajp_msg_check_header() incoming message is "
116 "too big %" APR_SIZE_T_FMT ", max is %" APR_SIZE_T_FMT,
117 msglen, msg->max_size);
121 msg->len = msglen + AJP_HEADER_LEN;
122 msg->pos = AJP_HEADER_LEN;
129 * Reset an AJP Message
131 * @param msg AJP Message to reset
132 * @return APR_SUCCESS or error
134 apr_status_t ajp_msg_reset(ajp_msg_t *msg)
136 msg->len = AJP_HEADER_LEN;
137 msg->pos = AJP_HEADER_LEN;
143 * Reuse an AJP Message
145 * @param msg AJP Message to reuse
146 * @return APR_SUCCESS or error
148 apr_status_t ajp_msg_reuse(ajp_msg_t *msg)
154 max_size = msg->max_size;
155 memset(msg, 0, sizeof(ajp_msg_t));
157 msg->max_size = max_size;
158 msg->header_len = AJP_HEADER_LEN;
164 * Mark the end of an AJP Message
166 * @param msg AJP Message to end
167 * @return APR_SUCCESS or error
169 apr_status_t ajp_msg_end(ajp_msg_t *msg)
171 apr_size_t len = msg->len - AJP_HEADER_LEN;
173 if (msg->server_side) {
182 msg->buf[2] = (apr_byte_t)((len >> 8) & 0xFF);
183 msg->buf[3] = (apr_byte_t)(len & 0xFF);
188 static APR_INLINE int ajp_log_overflow(ajp_msg_t *msg, const char *context)
190 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
191 "%s(): BufferOverflowException %" APR_SIZE_T_FMT
193 context, msg->pos, msg->len);
194 return AJP_EOVERFLOW;
198 * Add an unsigned 32bits value to AJP Message
200 * @param msg AJP Message to get value from
201 * @param value value to add to AJP Message
202 * @return APR_SUCCESS or error
204 apr_status_t ajp_msg_append_uint32(ajp_msg_t *msg, apr_uint32_t value)
206 apr_size_t len = msg->len;
208 if ((len + 4) > msg->max_size) {
209 return ajp_log_overflow(msg, "ajp_msg_append_uint32");
212 msg->buf[len] = (apr_byte_t)((value >> 24) & 0xFF);
213 msg->buf[len + 1] = (apr_byte_t)((value >> 16) & 0xFF);
214 msg->buf[len + 2] = (apr_byte_t)((value >> 8) & 0xFF);
215 msg->buf[len + 3] = (apr_byte_t)(value & 0xFF);
223 * Add an unsigned 16bits value to AJP Message
225 * @param msg AJP Message to get value from
226 * @param value value to add to AJP Message
227 * @return APR_SUCCESS or error
229 apr_status_t ajp_msg_append_uint16(ajp_msg_t *msg, apr_uint16_t value)
231 apr_size_t len = msg->len;
233 if ((len + 2) > msg->max_size) {
234 return ajp_log_overflow(msg, "ajp_msg_append_uint16");
237 msg->buf[len] = (apr_byte_t)((value >> 8) & 0xFF);
238 msg->buf[len + 1] = (apr_byte_t)(value & 0xFF);
246 * Add an unsigned 8bits value to AJP Message
248 * @param msg AJP Message to get value from
249 * @param value value to add to AJP Message
250 * @return APR_SUCCESS or error
252 apr_status_t ajp_msg_append_uint8(ajp_msg_t *msg, apr_byte_t value)
254 apr_size_t len = msg->len;
256 if ((len + 1) > msg->max_size) {
257 return ajp_log_overflow(msg, "ajp_msg_append_uint8");
260 msg->buf[len] = value;
267 * Add a String in AJP message, and transform the String in ASCII
268 * if convert is set and we're on an EBCDIC machine
270 * @param msg AJP Message to get value from
271 * @param value Pointer to String
272 * @param convert When set told to convert String to ASCII
273 * @return APR_SUCCESS or error
275 apr_status_t ajp_msg_append_string_ex(ajp_msg_t *msg, const char *value,
281 return(ajp_msg_append_uint16(msg, 0xFFFF));
285 if ((msg->len + len + 3) > msg->max_size) {
286 return ajp_log_overflow(msg, "ajp_msg_append_cvt_string");
289 /* ignore error - we checked once */
290 ajp_msg_append_uint16(msg, (apr_uint16_t)len);
292 /* We checked for space !! */
293 memcpy(msg->buf + msg->len, value, len + 1); /* including \0 */
296 /* convert from EBCDIC if needed */
297 ap_xlate_proto_to_ascii((char *)msg->buf + msg->len, len + 1);
306 * Add a Byte array to AJP Message
308 * @param msg AJP Message to get value from
309 * @param value Pointer to Byte array
310 * @param valuelen Byte array len
311 * @return APR_SUCCESS or error
313 apr_status_t ajp_msg_append_bytes(ajp_msg_t *msg, const apr_byte_t *value,
317 return APR_SUCCESS; /* Shouldn't we indicate an error ? */
320 if ((msg->len + valuelen) > msg->max_size) {
321 return ajp_log_overflow(msg, "ajp_msg_append_bytes");
324 /* We checked for space !! */
325 memcpy(msg->buf + msg->len, value, valuelen);
326 msg->len += valuelen;
332 * Get a 32bits unsigned value from AJP Message
334 * @param msg AJP Message to get value from
335 * @param rvalue Pointer where value will be returned
336 * @return APR_SUCCESS or error
338 apr_status_t ajp_msg_get_uint32(ajp_msg_t *msg, apr_uint32_t *rvalue)
342 if ((msg->pos + 3) > msg->len) {
343 return ajp_log_overflow(msg, "ajp_msg_get_uint32");
346 value = ((msg->buf[(msg->pos++)] & 0xFF) << 24);
347 value |= ((msg->buf[(msg->pos++)] & 0xFF) << 16);
348 value |= ((msg->buf[(msg->pos++)] & 0xFF) << 8);
349 value |= ((msg->buf[(msg->pos++)] & 0xFF));
357 * Get a 16bits unsigned value from AJP Message
359 * @param msg AJP Message to get value from
360 * @param rvalue Pointer where value will be returned
361 * @return APR_SUCCESS or error
363 apr_status_t ajp_msg_get_uint16(ajp_msg_t *msg, apr_uint16_t *rvalue)
367 if ((msg->pos + 1) > msg->len) {
368 return ajp_log_overflow(msg, "ajp_msg_get_uint16");
371 value = ((msg->buf[(msg->pos++)] & 0xFF) << 8);
372 value += ((msg->buf[(msg->pos++)] & 0xFF));
379 * Peek a 16bits unsigned value from AJP Message, position in message
382 * @param msg AJP Message to get value from
383 * @param rvalue Pointer where value will be returned
384 * @return APR_SUCCESS or error
386 apr_status_t ajp_msg_peek_uint16(ajp_msg_t *msg, apr_uint16_t *rvalue)
390 if ((msg->pos + 1) > msg->len) {
391 return ajp_log_overflow(msg, "ajp_msg_peek_uint16");
394 value = ((msg->buf[(msg->pos)] & 0xFF) << 8);
395 value += ((msg->buf[(msg->pos + 1)] & 0xFF));
402 * Peek a 8bits unsigned value from AJP Message, position in message
405 * @param msg AJP Message to get value from
406 * @param rvalue Pointer where value will be returned
407 * @return APR_SUCCESS or error
409 apr_status_t ajp_msg_peek_uint8(ajp_msg_t *msg, apr_byte_t *rvalue)
411 if (msg->pos > msg->len) {
412 return ajp_log_overflow(msg, "ajp_msg_peek_uint8");
415 *rvalue = msg->buf[msg->pos];
420 * Get a 8bits unsigned value from AJP Message
422 * @param msg AJP Message to get value from
423 * @param rvalue Pointer where value will be returned
424 * @return APR_SUCCESS or error
426 apr_status_t ajp_msg_get_uint8(ajp_msg_t *msg, apr_byte_t *rvalue)
429 if (msg->pos > msg->len) {
430 return ajp_log_overflow(msg, "ajp_msg_get_uint8");
433 *rvalue = msg->buf[msg->pos++];
439 * Get a String value from AJP Message
441 * @param msg AJP Message to get value from
442 * @param rvalue Pointer where value will be returned
443 * @return APR_SUCCESS or error
445 apr_status_t ajp_msg_get_string(ajp_msg_t *msg, const char **rvalue)
451 status = ajp_msg_get_uint16(msg, &size);
454 if ((status != APR_SUCCESS) || (size + start > msg->max_size)) {
455 return ajp_log_overflow(msg, "ajp_msg_get_string");
458 msg->pos += (apr_size_t)size;
459 msg->pos++; /* a String in AJP is NULL terminated */
461 *rvalue = (const char *)(msg->buf + start);
467 * Get a Byte array from AJP Message
469 * @param msg AJP Message to get value from
470 * @param rvalue Pointer where value will be returned
471 * @param rvalueLen Pointer where Byte array len will be returned
472 * @return APR_SUCCESS or error
474 apr_status_t ajp_msg_get_bytes(ajp_msg_t *msg, apr_byte_t **rvalue,
475 apr_size_t *rvalue_len)
481 status = ajp_msg_get_uint16(msg, &size);
482 /* save the current position */
485 if ((status != APR_SUCCESS) || (size + start > msg->max_size)) {
486 return ajp_log_overflow(msg, "ajp_msg_get_bytes");
488 msg->pos += (apr_size_t)size; /* only bytes, no trailer */
490 *rvalue = msg->buf + start;
498 * Create an AJP Message from pool
500 * @param pool memory pool to allocate AJP message from
501 * @param size size of the buffer to create
502 * @param rmsg Pointer to newly created AJP message
503 * @return APR_SUCCESS or error
505 apr_status_t ajp_msg_create(apr_pool_t *pool, apr_size_t size, ajp_msg_t **rmsg)
507 ajp_msg_t *msg = (ajp_msg_t *)apr_pcalloc(pool, sizeof(ajp_msg_t));
509 msg->server_side = 0;
511 msg->buf = (apr_byte_t *)apr_palloc(pool, size);
513 msg->header_len = AJP_HEADER_LEN;
514 msg->max_size = size;
521 * Recopy an AJP Message to another
523 * @param smsg source AJP message
524 * @param dmsg destination AJP message
525 * @return APR_SUCCESS or error
527 apr_status_t ajp_msg_copy(ajp_msg_t *smsg, ajp_msg_t *dmsg)
529 if (smsg->len > smsg->max_size) {
530 ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL,
531 "ajp_msg_copy(): destination buffer too "
532 "small %" APR_SIZE_T_FMT ", max size is %" APR_SIZE_T_FMT,
533 smsg->len, smsg->max_size);
537 memcpy(dmsg->buf, smsg->buf, smsg->len);
538 dmsg->len = smsg->len;
539 dmsg->pos = smsg->pos;
546 * Serialize in an AJP Message a PING command
548 * +-----------------------+
549 * | PING CMD (1 byte) |
550 * +-----------------------+
552 * @param smsg AJP message to put serialized message
553 * @return APR_SUCCESS or error
555 apr_status_t ajp_msg_serialize_ping(ajp_msg_t *msg)
560 if ((rc = ajp_msg_append_uint8(msg, CMD_AJP13_PING)) != APR_SUCCESS)
567 * Serialize in an AJP Message a CPING command
569 * +-----------------------+
570 * | CPING CMD (1 byte) |
571 * +-----------------------+
573 * @param smsg AJP message to put serialized message
574 * @return APR_SUCCESS or error
576 apr_status_t ajp_msg_serialize_cping(ajp_msg_t *msg)
581 if ((rc = ajp_msg_append_uint8(msg, CMD_AJP13_CPING)) != APR_SUCCESS)