1 /* Copyright 1999-2005 The Apache Software Foundation or its licensors, as
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * 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 * @brief Apache Jserv Protocol
21 * @defgroup AJP_defines AJP definitions
29 #include "apr_version.h"
32 #include "apr_hooks.h"
34 #include "apr_strings.h"
35 #include "apr_buckets.h"
37 #include "apr_network_io.h"
39 #include "apr_pools.h"
40 #include "apr_strings.h"
43 #include "apr_fnmatch.h"
44 #define APR_WANT_STRFUNC
47 #if APR_HAVE_NETINET_IN_H
48 #include <netinet/in.h>
50 #if APR_HAVE_ARPA_INET_H
51 #include <arpa/inet.h>
54 #define AJP13_DEF_HOST "127.0.0.1"
56 #define AJP13_DEF_PORT 9009 /* default to 9009 since 8009 is used by OS */
58 #define AJP13_DEF_PORT 8009
61 /* The following environment variables match mod_ssl! */
62 #define AJP13_HTTPS_INDICATOR "HTTPS"
63 #define AJP13_SSL_CLIENT_CERT_INDICATOR "SSL_CLIENT_CERT"
64 #define AJP13_SSL_CIPHER_INDICATOR "SSL_CIPHER"
65 #define AJP13_SSL_SESSION_INDICATOR "SSL_SESSION_ID"
66 #define AJP13_SSL_KEY_SIZE_INDICATOR "SSL_CIPHER_USEKEYSIZE"
68 #if APR_CHARSET_EBCDIC
70 #define USE_CHARSET_EBCDIC
71 #define ajp_xlate_to_ascii(b, l) ap_xlate_proto_to_ascii(b, l)
72 #define ajp_xlate_from_ascii(b, l) ap_xlate_proto_from_ascii(b, l)
74 #else /* APR_CHARSET_EBCDIC */
76 #define ajp_xlate_to_ascii(b, l)
77 #define ajp_xlate_from_ascii(b, l)
81 #ifdef AJP_USE_HTTPD_WRAP
82 #include "httpd_wrap.h"
85 #include "http_config.h"
86 #include "http_request.h"
87 #include "http_core.h"
88 #include "http_protocol.h"
89 #include "http_main.h"
93 #include "mod_proxy.h"
96 /** AJP Specific error codes
98 /** Buffer overflow exception */
99 #define AJP_EOVERFLOW (APR_OS_START_USERERR + 1)
100 /** Destination Buffer is to small */
101 #define AJP_ETOSMALL (APR_OS_START_USERERR + 2)
102 /** Invalid input parameters */
103 #define AJP_EINVAL (APR_OS_START_USERERR + 3)
104 /** Bad message signature */
105 #define AJP_EBAD_SIGNATURE (APR_OS_START_USERERR + 4)
106 /** Incoming message too bg */
107 #define AJP_ETOBIG (APR_OS_START_USERERR + 5)
108 /** Missing message header */
109 #define AJP_ENO_HEADER (APR_OS_START_USERERR + 6)
110 /** Bad message header */
111 #define AJP_EBAD_HEADER (APR_OS_START_USERERR + 7)
113 #define AJP_EBAD_MESSAGE (APR_OS_START_USERERR + 8)
114 /** Cant log via AJP14 */
115 #define AJP_ELOGFAIL (APR_OS_START_USERERR + 9)
116 /** Bad request method */
117 #define AJP_EBAD_METHOD (APR_OS_START_USERERR + 10)
120 /** A structure that represents ajp message */
121 typedef struct ajp_msg ajp_msg_t;
123 /** A structure that represents ajp message */
126 /** The buffer holding a AJP message */
128 /** The length of AJP message header (defaults to AJP_HEADER_LEN) */
129 apr_size_t header_len;
130 /** The length of AJP message */
132 /** The current read position */
134 /** Flag indicating the origing of the message */
139 * Signature for the messages sent from Apache to tomcat
141 #define AJP13_WS_HEADER 0x1234
142 #define AJP_HEADER_LEN 4
143 #define AJP_HEADER_SZ_LEN 2
144 #define AJP_MSG_BUFFER_SZ (8*1024)
145 #define AJP13_MAX_SEND_BODY_SZ (AJP_MSG_BUFFER_SZ - 6)
147 /** Send a request from web server to container*/
148 #define CMD_AJP13_FORWARD_REQUEST (unsigned char)2
149 /** Write a body chunk from the servlet container to the web server */
150 #define CMD_AJP13_SEND_BODY_CHUNK (unsigned char)3
151 /** Send response headers from the servlet container to the web server. */
152 #define CMD_AJP13_SEND_HEADERS (unsigned char)4
153 /** Marks the end of response. */
154 #define CMD_AJP13_END_RESPONSE (unsigned char)5
155 /** Get further data from the web server if it hasn't all been transferred yet. */
156 #define CMD_AJP13_GET_BODY_CHUNK (unsigned char)6
157 /** The web server asks the container to shut itself down. */
158 #define CMD_AJP13_SHUTDOWN (unsigned char)7
159 /** Webserver ask container to take control (logon phase) */
160 #define CMD_AJP13_PING (unsigned char)8
161 /** Container response to cping request */
162 #define CMD_AJP13_CPONG (unsigned char)9
163 /** Webserver check if container is alive, since container should respond by cpong */
164 #define CMD_AJP13_CPING (unsigned char)10
169 * @defgroup AJP_api AJP API functions
174 * Check a new AJP Message by looking at signature and return its size
176 * @param msg AJP Message to check
177 * @param len Pointer to returned len
178 * @return APR_SUCCESS or error
180 apr_status_t ajp_msg_check_header(ajp_msg_t *msg, apr_size_t *len);
183 * Reset an AJP Message
185 * @param msg AJP Message to reset
186 * @return APR_SUCCESS or error
188 apr_status_t ajp_msg_reset(ajp_msg_t *msg);
191 * Reuse an AJP Message
193 * @param msg AJP Message to reuse
194 * @return APR_SUCCESS or error
196 apr_status_t ajp_msg_reuse(ajp_msg_t *msg);
199 * Mark the end of an AJP Message
201 * @param msg AJP Message to end
202 * @return APR_SUCCESS or error
204 apr_status_t ajp_msg_end(ajp_msg_t *msg);
207 * Add an unsigned 32bits value to AJP Message
209 * @param msg AJP Message to get value from
210 * @param value value to add to AJP Message
211 * @return APR_SUCCESS or error
213 apr_status_t ajp_msg_append_uint32(ajp_msg_t *msg, apr_uint32_t value);
216 * Add an unsigned 16bits value to AJP Message
218 * @param msg AJP Message to get value from
219 * @param value value to add to AJP Message
220 * @return APR_SUCCESS or error
222 apr_status_t ajp_msg_append_uint16(ajp_msg_t *msg, apr_uint16_t value);
225 * Add an unsigned 8bits value to AJP Message
227 * @param msg AJP Message to get value from
228 * @param value value to add to AJP Message
229 * @return APR_SUCCESS or error
231 apr_status_t ajp_msg_append_uint8(ajp_msg_t *msg, apr_byte_t value);
234 * Add a String in AJP message, and transform the String in ASCII
235 * if convert is set and we're on an EBCDIC machine
237 * @param msg AJP Message to get value from
238 * @param value Pointer to String
239 * @param convert When set told to convert String to ASCII
240 * @return APR_SUCCESS or error
242 apr_status_t ajp_msg_append_string_ex(ajp_msg_t *msg, const char *value,
245 * Add a String in AJP message, and transform
246 * the String in ASCII if we're on an EBCDIC machine
248 #define ajp_msg_append_string(m, v) ajp_msg_append_string_ex(m, v, 1)
251 * Add a String in AJP message.
253 #define ajp_msg_append_string_ascii(m, v) ajp_msg_append_string_ex(m, v, 0)
256 * Add a Byte array to AJP Message
258 * @param msg AJP Message to get value from
259 * @param value Pointer to Byte array
260 * @param valuelen Byte array len
261 * @return APR_SUCCESS or error
263 apr_status_t ajp_msg_append_bytes(ajp_msg_t *msg, const apr_byte_t *value,
264 apr_size_t valuelen);
267 * Get a 32bits unsigned value from AJP Message
269 * @param msg AJP Message to get value from
270 * @param rvalue Pointer where value will be returned
271 * @return APR_SUCCESS or error
273 apr_status_t ajp_msg_get_uint32(ajp_msg_t *msg, apr_uint32_t *rvalue);
276 * Get a 16bits unsigned value from AJP Message
278 * @param msg AJP Message to get value from
279 * @param rvalue Pointer where value will be returned
280 * @return APR_SUCCESS or error
282 apr_status_t ajp_msg_get_uint16(ajp_msg_t *msg, apr_uint16_t *rvalue);
285 * Peek a 16bits unsigned value from AJP Message, position in message
288 * @param msg AJP Message to get value from
289 * @param rvalue Pointer where value will be returned
290 * @return APR_SUCCESS or error
292 apr_status_t ajp_msg_peek_uint16(ajp_msg_t *msg, apr_uint16_t *rvalue);
295 * Get a 8bits unsigned value from AJP Message
297 * @param msg AJP Message to get value from
298 * @param rvalue Pointer where value will be returned
299 * @return APR_SUCCESS or error
301 apr_status_t ajp_msg_get_uint8(ajp_msg_t *msg, apr_byte_t *rvalue);
304 * Peek a 8bits unsigned value from AJP Message, position in message
307 * @param msg AJP Message to get value from
308 * @param rvalue Pointer where value will be returned
309 * @return APR_SUCCESS or error
311 apr_status_t ajp_msg_peek_uint8(ajp_msg_t *msg, apr_byte_t *rvalue);
314 * Get a String value from AJP Message
316 * @param msg AJP Message to get value from
317 * @param rvalue Pointer where value will be returned
318 * @return APR_SUCCESS or error
320 apr_status_t ajp_msg_get_string(ajp_msg_t *msg, const char **rvalue);
324 * Get a Byte array from AJP Message
326 * @param msg AJP Message to get value from
327 * @param rvalue Pointer where value will be returned
328 * @param rvalueLen Pointer where Byte array len will be returned
329 * @return APR_SUCCESS or error
331 apr_status_t ajp_msg_get_bytes(ajp_msg_t *msg, apr_byte_t **rvalue,
332 apr_size_t *rvalue_len);
335 * Create an AJP Message from pool
337 * @param pool memory pool to allocate AJP message from
338 * @param rmsg Pointer to newly created AJP message
339 * @return APR_SUCCESS or error
341 apr_status_t ajp_msg_create(apr_pool_t *pool, ajp_msg_t **rmsg);
344 * Recopy an AJP Message to another
346 * @param smsg source AJP message
347 * @param dmsg destination AJP message
348 * @return APR_SUCCESS or error
350 apr_status_t ajp_msg_copy(ajp_msg_t *smsg, ajp_msg_t *dmsg);
353 * Serialize in an AJP Message a PING command
355 * +-----------------------+
356 * | PING CMD (1 byte) |
357 * +-----------------------+
359 * @param smsg AJP message to put serialized message
360 * @return APR_SUCCESS or error
362 apr_status_t ajp_msg_serialize_ping(ajp_msg_t *msg);
365 * Serialize in an AJP Message a CPING command
367 * +-----------------------+
368 * | CPING CMD (1 byte) |
369 * +-----------------------+
371 * @param smsg AJP message to put serialized message
372 * @return APR_SUCCESS or error
374 apr_status_t ajp_msg_serialize_cping(ajp_msg_t *msg);
377 * Dump up to the first 1024 bytes on an AJP Message
379 * @param pool pool to allocate from
380 * @param msg AJP Message to dump
381 * @param err error string to display
382 * @return dump message
384 char * ajp_msg_dump(apr_pool_t *pool, ajp_msg_t *msg, char *err);
387 * Send an AJP message to backend
389 * @param soct backend socket
390 * @param smsg AJP message to put serialized message
391 * @return APR_SUCCESS or error
393 apr_status_t ajp_ilink_send(apr_socket_t *sock, ajp_msg_t *msg);
396 * Receive an AJP message from backend
398 * @param sock backend socket
399 * @param smsg AJP message to put serialized message
400 * @return APR_SUCCESS or error
402 apr_status_t ajp_ilink_receive(apr_socket_t *sock, ajp_msg_t *msg);
405 * Build the ajp header message and send it
406 * @param sock backend socket
407 * @param r current request
408 * @uri uri requested uri
409 * @return APR_SUCCESS or error
411 apr_status_t ajp_send_header(apr_socket_t *sock, request_rec *r,
415 * Read the ajp message and return the type of the message.
416 * @param sock backend socket
417 * @param r current request
418 * @param msg returned AJP message
419 * @return APR_SUCCESS or error
421 apr_status_t ajp_read_header(apr_socket_t *sock,
426 * Allocate a msg to send data
427 * @param pool pool to allocate from
428 * @param ptr data buffer
429 * @param len the length of allocated data buffer
430 * @param msg returned AJP message
431 * @return APR_SUCCESS or error
433 apr_status_t ajp_alloc_data_msg(apr_pool_t *pool, char **ptr,
434 apr_size_t *len, ajp_msg_t **msg);
437 * Send the data message
438 * @param sock backend socket
439 * @param msg AJP message to send
440 * @param len AJP message length
441 * @return APR_SUCCESS or error
443 apr_status_t ajp_send_data_msg(apr_socket_t *sock,
444 ajp_msg_t *msg, apr_size_t len);
447 * Parse the message type
448 * @param r current request
449 * @param msg AJP message
450 * @return AJP message type.
452 int ajp_parse_type(request_rec *r, ajp_msg_t *msg);
455 * Parse the header message from container
456 * @param r current request
457 * @param msg AJP message
458 * @return APR_SUCCESS or error
460 apr_status_t ajp_parse_header(request_rec *r, proxy_dir_conf *conf,
464 * Parse the message body and return data address and length
465 * @param r current request
466 * @param msg AJP message
467 * @param len returned AJP message length
468 * @param ptr returned data
469 * @return APR_SUCCESS or error
471 apr_status_t ajp_parse_data(request_rec *r, ajp_msg_t *msg,
472 apr_uint16_t *len, char **ptr);