File: statistics.c

package info (click to toggle)
opensips 2.2.2-3.1
  • links: PTS
  • area: main
  • in suites: bullseye, sid
  • size: 31,160 kB
  • sloc: ansic: 334,348; xml: 91,231; perl: 6,659; sh: 5,148; sql: 4,175; makefile: 3,167; yacc: 2,499; python: 1,197; cpp: 611; php: 573
file content (432 lines) | stat: -rw-r--r-- 12,085 bytes parent folder | download | duplicates (2)
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
/*
 * Copyright (C) 2006-2007 VozTelecom Sistemas S.L
 *
 * This file is part of opensips, a free SIP server.
 *
 * opensips is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * opensips is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */

#include <stdlib.h>
#include <time.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h> /* superset of previous */
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h>

#include "statistics.h"
#include "seas.h" /*SLOG*/
#include "../../mem/shm_mem.h"
#include "../../resolve.h"
#include "../../ut.h"
#include "../../dprint.h"
#include "../../locking.h"
#define STATS_PAY 101

struct statstable*  seas_stats_table;
int stats_fd;
char use_stats=0;
pid_t pid;

static void sig_handler(int signo)
{
   switch(signo){
      case SIGTERM:
	 LM_ERR("stats process caught SIGTERM, shutting down..\n");
	 close(stats_fd);
	 destroy_seas_stats_table();
	 exit(0);
      default:
	 LM_DBG("caught signal %d\n",signo);
   }
   LM_WARN("statistics process:caught signal (%d)\n",signo);
}

struct statstable* init_seas_stats_table(void)
{
   /*allocs the table*/
   seas_stats_table= (struct statstable*)shm_malloc( sizeof( struct statstable ) );
   if (!seas_stats_table) {
      LM_ERR("no shmem for stats table (%d bytes)\n",(int)sizeof(struct statstable));
      return 0;
   }
   memset(seas_stats_table, 0, sizeof(struct statstable) );
   if(0==(seas_stats_table->mutex=lock_alloc())){
      LM_ERR("couldn't alloc mutex (get_lock_t)\n");
      shm_free(seas_stats_table);
      return 0;
   }
   lock_init(seas_stats_table->mutex);
   return seas_stats_table;
}

/** This will be called from within w_as_relay()
 *
 * TODO handle locking ?
 */
void as_relay_stat(struct cell *t)
{
   struct statscell *s;
   struct totag_elem *to;
   if(t==0)
      return;
   if(t->fwded_totags != 0){
      LM_DBG("seas:as_relay_stat() unable to put a payload "
			  "in fwded_totags because it is being used !!\n");
      return;
   }
   if(!(s=shm_malloc(sizeof(struct statscell)))){
      return;
   }
   if(!(to=shm_malloc(sizeof(struct totag_elem)))){
      shm_free(s);
      return;
   }
   memset(s,0,sizeof(struct statscell));
   gettimeofday(&(s->u.uas.as_relay),NULL);
   s->type=UAS_T;
   to->tag.len=0;
   to->tag.s=(char *)s;
   to->next=0;
   to->acked=STATS_PAY;
   t->fwded_totags=to;
   lock_get(seas_stats_table->mutex);
   (seas_stats_table->started_transactions)++;
   lock_release(seas_stats_table->mutex);
}

/** this will be called from the SEAS event dispatcher
 * when it writes the event to the socket
 *
 * Parameters: a cell OR its hash_index and its label
 *
 * TODO handle locking/mutexing ?
 */
void event_stat(struct cell *t)
{
   struct statscell *s;
   struct totag_elem *to;
   if(t==0){
      /*seas_f.tmb.t_lookup_ident(&t,hash_index,label); BAD bcos it refcounts,
	   * and there's no way to simply unrefcount from outside TM*/
      return;
   }
   if(t->fwded_totags == 0){
      LM_DBG("seas:event_stat() unabe to set the event_stat timeval:"
			  " no payload found at cell!! (fwded_totags=0)\n");
      return;
   }
   /*esto da un CORE DUMP cuando hay mucha carga.. warning*/
   to=t->fwded_totags;
   while(to){
      if(to->acked==STATS_PAY){
	 s=(struct statscell *)to->tag.s;
	 gettimeofday(&(s->u.uas.event_sent),NULL);
	 return;
      }else
	 to=to->next;
   }
   return;
}

/** param i is in milliseconds*/
static inline int assignIndex(int i)
{
   return (i/100)>14?14:(i/100);
}

/** this will be called from the SEAS action dispatcher
 * when it receives the action from the socket
 */
void action_stat(struct cell *t)
{
   unsigned int seas_dispatch/*,as_delay*/;
   struct timeval *t1,*t2/*,*t3*/;
   struct statscell *s;
   struct totag_elem *to;
   if(t==0)
      return;
   if(t->fwded_totags == 0){
      LM_DBG("seas:event_stat() unable to set the event_stat timeval:"
			  " no payload found at cell!! (fwded_totags=0)\n");
      return;
   }
   to=t->fwded_totags;
   while(to){
      if(to->acked==STATS_PAY){
	 s=(struct statscell *)to->tag.s;
	 gettimeofday(&(s->u.uas.action_recvd),NULL);
	 break;
      }else
	 to=to->next;
   }
   /**no statistics found**/
   if(to==0)
      return;
   t1=&(s->u.uas.as_relay);
   t2=&(s->u.uas.event_sent);
/*   t3=&(s->u.uas.action_recvd); */
   seas_dispatch = (t2->tv_sec - t1->tv_sec)*1000 + (t2->tv_usec-t1->tv_usec)/1000;
/*   as_delay = (t3->tv_sec - t2->tv_sec)*1000 + (t3->tv_usec-t2->tv_usec)/1000; */

   lock_get(seas_stats_table->mutex);
   {
      seas_stats_table->dispatch[assignIndex(seas_dispatch)]++;
      seas_stats_table->event[assignIndex(seas_dispatch)]++;
      (seas_stats_table->finished_transactions)++;
   }
   lock_release(seas_stats_table->mutex);
}


/**
 * stats socket sould be an IP_address:port or unix://path/to_file
 * TODO handling unix sockets and IPv6 !!
 *
 * returns
 * 0 if no stats
 * 1 if stats properly started
 * -1 if error
 */
int start_stats_server(char *stats_socket)
{
   char *p,*port;
   unsigned short stats_port;
   struct hostent *he;
   /*use sockaddr_storage ??*/
   struct sockaddr_in su;
   int optval;

   use_stats=0;
   port=(char *)0;
   he=(struct hostent *)0;
   stats_fd=-1;
   p=stats_socket;

   if(p==0 || *p==0)
      return 0;

   if(!init_seas_stats_table()){
      LM_ERR("unable to init stats table, disabling statistics\n");
      return -1;
   }
   while(*p){
      if(*p == ':'){
	 *p=0;
	 port=p+1;
	 break;
      }
   }
   if(!(he=resolvehost(stats_socket,0)))
      goto error;
   if(port==(char*)0 || *port==0)
      stats_port=5088;
   else if(!(stats_port=str2s(port,strlen(port),0))){
	 LM_ERR("invalid port %s\n",port);
	 goto error;
      }
   if((stats_fd=socket(he->h_addrtype, SOCK_STREAM, 0))==-1){
      LM_ERR("trying to open server socket (%s)\n",strerror(errno));
      goto error;
   }
   optval=1;
   if (setsockopt(stats_fd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(optval))==-1) {
      LM_ERR("setsockopt (%s)\n",strerror(errno));
      goto error;
   }
   su.sin_family = he->h_addrtype;
   su.sin_port=htons(stats_port);
   memcpy(&su.sin_addr,he->h_addr_list[0],4);
   if((bind(stats_fd,(struct sockaddr*)&su,sizeof(struct sockaddr_in)))==-1){
      LM_ERR( "bind (%s)\n",strerror(errno));
      goto error;
   }
   if(listen(stats_fd, 10)==-1){
      LM_ERR( "listen (%s)\n",strerror(errno));
      goto error;
   }
   if(!(pid=fork())){/*child*/
      signal(SIGTERM,sig_handler);
      serve_stats(stats_fd);
      printf("statistics Server Process exits !!\n");
      exit(0);
   }else if(pid>0){/*parent*/
      close(stats_fd);
   }else{/*error*/
      LM_ERR("failed to create stats server process\n");
      goto error;
   }
   use_stats=1;
   return 1;
error:
   if(stats_fd!=-1)
      close(stats_fd);
   destroy_seas_stats_table();
   return -1;
}

/**
 * stats socket sould be an IP_address:port or unix://path/to_file
 * TODO handling unix sockets and IPv6 !!
 *
 * returns
 * 0 if no stats
 * 1 if stats properly started
 * -1 if error
 */
int stop_stats_server(void)
{
   if(pid)
      kill(SIGTERM,pid);
   return 0;
}

void serve_stats(int fd)
{
   union sockaddr_union su;
   int sock,i,retrn;
   socklen_t su_len;
   char f;
   /* we install our signal handler..*/
   signal(SIGTERM,sig_handler);
   signal(SIGHUP,sig_handler);
   signal(SIGPIPE,sig_handler);
   signal(SIGQUIT,sig_handler);
   signal(SIGINT,sig_handler);
   signal(SIGCHLD,sig_handler);

   while(1){
      su_len = sizeof(union sockaddr_union);
      sock=-1;
      sock=accept(fd, &su.s, &su_len);
      if(sock==-1){
	 if(errno==EINTR){
	    continue;
	 }else{
	    LM_ERR("failed to accept connection: %s\n", strerror(errno));
	    return ;
	 }
      }
      while(0!=(i=read(sock,&f,1))){
	 if(i==-1){
	    if(errno==EINTR){
	       continue;
	    }else{
	       LM_ERR("unknown error reading from socket\n");
	       close(sock);
	       /** and continue accept()'ing*/
	       break;
	    }
	 }
	 retrn=print_stats_info(f,sock);
	 if(retrn==-1){
	    /**simple error happened, don't worry*/
	       LM_ERR("printing statisticss \n");
	       continue;
	 }else if(retrn==-2){
	    /**let's go to the outer loop, and receive more Statistics clients*/
	    LM_ERR("statistics client left\n");
	    close(sock);
	    break;
	 }
      }
   }
}

/**
 * (from snprintf manual)
 * "The  functions  snprintf()  and vsnprintf() do not write more than size bytes (including the trailing '\\0').  If the output was truncated due to
 * this limit then the return value is the number of characters (not including the trailing '\\0') which would have been written to the final string
 * if  enough space had been available. Thus, a return value of size or more means that the output was truncated."
 */
int print_stats_info(int f,int sock)
{
#define STATS_BUF_SIZE  400
   int j,k,writen;
   char buf[STATS_BUF_SIZE];

   writen=0;
   if(0>(k=snprintf(buf,STATS_BUF_SIZE, "Timings:      0-1   1-2   2-3   3-4   4-5   5-6   6-7   7-8   8-9   9-10  10-11 11-12 12-13 13-14 14+\n"))){
      goto error;
   }else{
      if(k>STATS_BUF_SIZE){
	 j=STATS_BUF_SIZE;
	 goto send;
      }
      j=k;
   }
   lock_get(seas_stats_table->mutex);
   if(0>(k=snprintf(&buf[j],STATS_BUF_SIZE-j,"UAS:dispatch: %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d\n",\
	       seas_stats_table->dispatch[0],seas_stats_table->dispatch[1],seas_stats_table->dispatch[2],seas_stats_table->dispatch[3],seas_stats_table->dispatch[4]\
	       ,seas_stats_table->dispatch[5],seas_stats_table->dispatch[6],seas_stats_table->dispatch[7],seas_stats_table->dispatch[8],seas_stats_table->dispatch[9],\
	       seas_stats_table->dispatch[10],seas_stats_table->dispatch[11],seas_stats_table->dispatch[12],seas_stats_table->dispatch[13],seas_stats_table->dispatch[14]))){
      goto error;
   }else{
      if(k>(STATS_BUF_SIZE-j)){
	 j=STATS_BUF_SIZE;
	 goto send;
      }
      j+=k;
   }
   if(0>(k=snprintf(&buf[j],STATS_BUF_SIZE-j,"UAS:event:    %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d %-5d\n",\
	       seas_stats_table->event[0],seas_stats_table->event[1],seas_stats_table->event[2],seas_stats_table->event[3],seas_stats_table->event[4]\
	       ,seas_stats_table->event[5],seas_stats_table->event[6],seas_stats_table->event[7],seas_stats_table->event[8],seas_stats_table->event[9],\
	       seas_stats_table->event[10],seas_stats_table->event[11],seas_stats_table->event[12],seas_stats_table->event[13],seas_stats_table->event[14]))){
      goto error;
   }else{
      if(k>STATS_BUF_SIZE-j){
	 j=STATS_BUF_SIZE;
	 goto send;
      }
      j+=k;
   }
   if(0>(k=snprintf(&buf[j],STATS_BUF_SIZE-j,"Started Transactions: %d\nTerminated Transactions:%d\nReceived replies:%d\nReceived:%d\n",\
	       seas_stats_table->started_transactions,seas_stats_table->finished_transactions,seas_stats_table->received_replies,seas_stats_table->received))){
      goto error;
   }else{
      if(k>STATS_BUF_SIZE-j){
	 j=STATS_BUF_SIZE;
	 goto send;
      }
      j+=k;
   }
send:
   lock_release(seas_stats_table->mutex);
again:/*mutex is released*/
   k=write(sock,buf,j);
   if(k<0){
      switch(errno){
	 case EINTR:
	    goto again;
	 case EPIPE:
	    return -2;
      }
   }
   writen+=k;
   if(writen<j)
      goto again;
   return writen;
error:/*mutex is locked*/
   lock_release(seas_stats_table->mutex);
   return -1;
}