/
Prefetch.h
454 lines (340 loc) · 10 KB
/
Prefetch.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
/** @file
A brief file description
@section license License
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef _PREFETCH_H_
#define _PREFETCH_H_
#include "IPRange.h"
#include "TransformInternal.h"
#ifdef PREFETCH
#include "Update.h"
#include "api/include/ts_private_frozen.h"
#define IPSTRARGS(ip) (unsigned int) ((unsigned char *) &(ip))[0], \
(unsigned int) ((unsigned char *) &(ip))[1], \
(unsigned int) ((unsigned char *) &(ip))[2], \
(unsigned int) ((unsigned char *) &(ip))[3]
typedef enum
{
ILL_BLAST = 0,
UDP_BLAST = INK_PREFETCH_PROTO_UDP,
TCP_BLAST = INK_PREFETCH_PROTO_TCP
//MULTICAST_BLAST = INK_PREFETCH_PROTO_UDP_MULTICAST
} PrefetchBlastType;
class BlasterUrlList;
class PrefetchUrlBlaster;
class PrefetchBlaster;
extern BlasterUrlList *multicastUrlBlaster;
struct PrefetchConfiguration
{
int prefetch_enabled;
IPRange ip_range;
struct html_tag *html_tags_table;
struct html_tag *html_attrs_table;
int local_http_server_port;
int stuffer_port;
int url_buffer_size;
int url_buffer_timeout;
unsigned int default_url_proto;
unsigned int default_data_proto;
int keepalive_timeout;
int push_cached_objects;
unsigned int max_object_size;
unsigned int max_recursion; //limit on depth of recursive prefetch
unsigned int redirection; //limit on depth of redirect prefetch
INKPrefetchHook pre_parse_hook;
INKPrefetchHook embedded_url_hook;
INKPrefetchHook embedded_obj_hook;
int readConfiguration();
void readHtmlTags(int fd, html_tag ** ptags, html_tag ** pattrs);
};
class PrefetchUrlEntry:RefCountObj
{
public:
PrefetchUrlEntry()
:url(0), len(INT_MAX), resp_blaster(0),
object_buf_status(INK_PREFETCH_OBJ_BUF_NOT_NEEDED),
req_ip(0), child_ip(0), url_multicast_ip(0), data_multicast_ip(0), blaster_link(0), hash_link(0)
{
refcount_inc();
}
void init(char *str, INK_MD5 & xmd5)
{
len = strlen(url = str) + 1;
md5 = xmd5;
}
void free();
PrefetchUrlEntry *assign()
{
refcount_inc();
return this;
};
char *url;
int len;
INK_MD5 md5;
//PrefetchBlastType resp_blast_proto;
//HTTPHdr * request;
PrefetchBlaster *resp_blaster;
int object_buf_status;
inku32 req_ip; /*ip address where request is coming from */
inku32 child_ip;
inku32 url_multicast_ip;
inku32 data_multicast_ip;
PrefetchUrlEntry *blaster_link;
PrefetchUrlEntry *hash_link;
private:
// this private copy ctor is set to prevent from being used
// coverity[uninit_member]
PrefetchUrlEntry(const PrefetchUrlEntry &)
{
};
};
extern ClassAllocator<PrefetchUrlEntry> prefetchUrlEntryAllocator;
inline void
PrefetchUrlEntry::free()
{
if (refcount_dec() == 0) {
if (url)
xfree(url);
prefetchUrlEntryAllocator.free(this);
}
}
class PrefetchTransform:public INKVConnInternal, RefCountObj
{
enum
{ HASH_TABLE_LENGTH = 61 /*127, 511 */ };
public:
PrefetchTransform(HttpSM * sm, HTTPHdr * resp);
~PrefetchTransform();
void free()
{
if (refcount_dec() == 0)
delete this;
};
PrefetchTransform *assign()
{
refcount_inc();
return this;
};
int handle_event(int event, void *edata);
int parse_data(IOBufferReader * reader);
int redirect(HTTPHdr * resp);
PrefetchUrlEntry *hash_add(char *url);
public:
MIOBuffer * m_output_buf;
IOBufferReader *m_output_reader;
VIO *m_output_vio;
HttpSM *m_sm;
//HTTPHdr *m_request;
//HTTPHdr *m_response;
char *url;
//unsigned int child_ip;
HtmlParser html_parser;
PrefetchUrlEntry *hash_table[HASH_TABLE_LENGTH];
BlasterUrlList *udp_url_list;
BlasterUrlList *tcp_url_list;
const char *domain_start;
const char *domain_end;
const char *host_start;
int host_len;
bool no_dot_in_host;
};
//blaster
class BlasterUrlList:public Continuation
{
int timeout; //in milliseconds
Action *action;
int mtu;
PrefetchBlastType blast_proto;
PrefetchUrlEntry *list_head;
int cur_len;
public:
BlasterUrlList()
: Continuation(), timeout(0), action(0), mtu(0), blast_proto(ILL_BLAST), list_head(0), cur_len(0)
{
}
void init(PrefetchBlastType btype = UDP_BLAST, int tout = 0, int xmtu = INT_MAX) {
SET_HANDLER((int (BlasterUrlList::*)(int, void *))
(&BlasterUrlList::handleEvent));
mutex = new_ProxyMutex();
blast_proto = btype;
timeout = tout;
mtu = xmtu;
}
void free();
int handleEvent(int event, void *data);
void invokeUrlBlaster();
};
extern ClassAllocator<BlasterUrlList> blasterUrlListAllocator;
inline void
BlasterUrlList::free()
{
mutex = NULL;
blasterUrlListAllocator.free(this);
}
class PrefetchUrlBlaster:public Continuation
{
public:
typedef int (PrefetchUrlBlaster::*EventHandler) (int, void *);
PrefetchUrlBlaster()
: url_head(0), proto(ILL_BLAST), action(0)
{
}
void init(PrefetchUrlEntry * list_head, PrefetchBlastType u_proto = UDP_BLAST);
void free();
PrefetchUrlEntry *url_head;
PrefetchBlastType proto;
Action *action;
void writeBuffer(MIOBuffer * buf);
int udpUrlBlaster(int event, void *data);
};
extern ClassAllocator<PrefetchUrlBlaster> prefetchUrlBlasterAllocator;
void
PrefetchUrlBlaster::init(PrefetchUrlEntry * list_head, PrefetchBlastType u_proto)
{
/* More clean up necessary... we should not need this class
XXXXXXXXX */
mutex = new_ProxyMutex();
url_head = list_head;
proto = u_proto;
MUTEX_LOCK(lock, mutex, this_ethread());
udpUrlBlaster(SIMPLE_EVENT_EVENTS_START, NULL);
}
inline void
BlasterUrlList::invokeUrlBlaster()
{
PrefetchUrlBlaster *u_blaster = prefetchUrlBlasterAllocator.alloc();
u_blaster->init(list_head, blast_proto);
list_head = NULL;
cur_len = 0;
}
class PrefetchBlaster:public Continuation
{
public:
typedef int (PrefetchBlaster::*EventHandler) (int event, void *data);
PrefetchBlaster()
: Continuation(), url_ent(0), transform(0), url_list(0), request(0),
cache_http_info(0), buf(0), reader(0), serverVC(0), data_proto(0), n_pkts_sent(0), seq_no(0), io_block(0)
{
};
~PrefetchBlaster() {
};
int init(PrefetchUrlEntry * entry, HTTPHdr * request, PrefetchTransform * p_trans);
int handleEvent(int event, void *data);
int bufferObject(int event, void *data);
int blastObject(int event, void *data);
int httpClient(int event, void *data);
int invokeBlaster();
void initCacheLookupConfig();
void handleCookieHeaders(HTTPHdr * req_hdr, HTTPHdr * resp_hdr,
const char *domain_start, const char *domain_end,
const char *host_start, int host_len, bool no_dot);
void free();
PrefetchUrlEntry *url_ent;
PrefetchTransform *transform;
BlasterUrlList *url_list;
HTTPHdr *request;
CacheHTTPInfo *cache_http_info;
MIOBuffer *buf;
IOBufferReader *reader;
VConnection *serverVC;
unsigned int data_proto;
CacheLookupHttpConfig cache_lookup_config;
//udp related:
inku32 n_pkts_sent;
inku32 seq_no;
IOBufferBlock *io_block;
};
extern ClassAllocator<PrefetchBlaster> prefetchBlasterAllocator;
/*Conncetion keep alive*/
#define PRELOAD_HEADER_LEN 12 //this is the new header
//assuming bigendian bit order. does any body have a little endian bit order?
#define PRELOAD_HDR_URL_PROMISE_FLAG (0x40000000)
#define PRELOAD_HDR_RESPONSE_FLAG (0x80000000)
#define PRELOAD_UDP_HEADER_LEN 12
#define PRELOAD_UDP_LAST_PKT_FLAG (0x80000000)
#define PRELOAD_UDP_PKT_NUM_MASK (0x7fffffff)
class KeepAliveConn:Continuation
{
public:
KeepAliveConn()
:Continuation(), ip(0), nbytes_added(0)
{
};
int init(unsigned int ip, MIOBuffer * buf, IOBufferReader * reader);
void free();
int append(IOBufferReader * reader);
int handleEvent(int event, void *data);
unsigned int ip;
MIOBuffer *buf;
IOBufferReader *reader;
MIOBuffer *read_buf;
NetVConnection *childVC;
VIO *vio;
KeepAliveConn *next;
unsigned int nbytes_added;
};
class KeepAliveConnTable
{
public:
KeepAliveConnTable():arr(NULL)
{
};
int init();
void free();
static int ip_hash(unsigned int ip);
int append(unsigned int ip, MIOBuffer * buf, IOBufferReader * reader);
typedef struct
{
KeepAliveConn *conn;
ProxyMutexPtr mutex;
} conn_elem;
conn_elem *arr;
};
extern KeepAliveConnTable *g_conn_table;
class KeepAliveLockHandler:Continuation
{
/* Used when we miss the lock for the connection */
public:
KeepAliveLockHandler()
:Continuation(), ip(0)
{
};
void init(unsigned int xip, MIOBuffer * xbuf, IOBufferReader * xreader)
{
mutex = g_conn_table->arr[KeepAliveConnTable::ip_hash(ip)].mutex;
ip = xip;
buf = xbuf;
reader = xreader;
SET_HANDLER(&KeepAliveLockHandler::handleEvent);
this_ethread()->schedule_in(this, HRTIME_MSECONDS(10));
}
~KeepAliveLockHandler() {
mutex = NULL;
}
int handleEvent(int event, void *data);
unsigned int ip;
MIOBuffer *buf;
IOBufferReader *reader;
};
#define TS_ReadConfigInteger REC_ReadConfigInteger
#define TS_ReadConfigString REC_ReadConfigString
#define TS_EstablishStaticConfigInteger REC_EstablishStaticConfigInteger
#define TS_RegisterConfigUpdateFunc REC_RegisterConfigUpdateFunc
#define TS_ReadConfigStringAlloc REC_ReadConfigStringAlloc
#define TS_ConfigReadInteger REC_ConfigReadInteger
#define TS_ConfigReadString REC_ConfigReadString
#endif // PREFETCH
#endif // _PREFETCH_H_