telnetsrv.c 26.2 KB
Newer Older
1 2 3 4 5
/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
6
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * 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.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

22
/*! \file common/utils/telnetsrv/telnetsrv.c
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
 * \brief: implementation of a telnet server
 * \author Francois TABURET
 * \date 2017
 * \version 0.1
 * \company NOKIA BellLabs France
 * \email: francois.taburet@nokia-bell-labs.com
 * \note
 * \warning
 */
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <pthread.h>
46
#include "telnetsrv.h"
47 48 49 50 51 52 53
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <sys/time.h>
#include <sys/resource.h>
54
#include "common/utils/load_module_shlib.h" 
55
#include "common/config/config_userapi.h"
56
#include <readline/history.h>
57 58 59 60


#include "telnetsrv_phycmd.h"
#include "telnetsrv_proccmd.h"	
61
static char* telnet_defstatmod[] = {"softmodem","phy","loader"}; 
62 63 64 65 66
static telnetsrv_params_t telnetparams;
#define TELNETSRV_LISTENADDR 0
#define TELNETSRV_LISTENPORT 1
#define TELNETSRV_PRIORITY   2
#define TELNETSRV_DEBUG      3
67 68 69 70 71 72 73 74
#define TELNETSRV_LOOPC      4
#define TELNETSRV_LOOPD      5
#define TELNETSRV_HISFILE    6  
#define TELNETSRV_HISSIZE    7 
#define TELNETSRV_PHYBSIZE   8  
#define TELNETSRV_STATICMOD  9
#define TELNETSRV_SHRMOD     10

75 76 77 78 79 80 81
paramdef_t telnetoptions[] = {
/*--------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
/*                                            configuration parameters for telnet utility                                                                             */
/*   optname                     helpstr                paramflags           XXXptr                               defXXXval               type                 numelt */
/*--------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
	{"listenaddr",    "<listen ip address>",         0,                 uptr:&telnetparams.listenaddr,        defstrval:"0.0.0.0",            TYPE_IPV4ADDR,  0 },
	{"listenport",    "<local port>",                0,                 uptr:&(telnetparams.listenport),      defuintval:9090,                TYPE_UINT,      0 },
82
        {"priority",      "<scheduling policy (0-99)",   0,                 iptr:&telnetparams.priority,          defuintval:0,                   TYPE_INT,       0 }, 
83 84 85
	{"debug",         "<debug level>",               0,                 uptr:NULL,                            defuintval:0,                   TYPE_UINT,      0 },
	{"loopcount",     "<loop command iterations>",   0,                 uptr:&(telnetparams.loopcount),       defuintval:10,                  TYPE_UINT,      0 },
	{"loopdelay",     "<loop command delay (ms)>",   0,                 uptr:&(telnetparams.loopdelay),       defuintval:5000,                TYPE_UINT,      0 },
86 87
	{"histfile",      "<history file name>",         PARAMFLAG_NOFREE,  strptr:&(telnetparams.histfile),      defstrval:"oaitelnet.history",  TYPE_STRING,    0 },
	{"histsize",      "<history sizes>",             0,                 iptr:&(telnetparams.histsize),        defuintval:50,                  TYPE_INT,       0 },
88
	{"phypbsize",     "<phy dump buff size (bytes)>",0,                 uptr:&(telnetparams.phyprntbuff_size),defuintval:65000,               TYPE_UINT,      0 },
89 90
        {"staticmod",     "<static modules selection>",  0,                 strlistptr:NULL,                      defstrlistval:telnet_defstatmod,TYPE_STRINGLIST,(sizeof(telnet_defstatmod)/sizeof(char *))},
        {"shrmod",        "<dynamic modules selection>", 0,                 strlistptr:NULL,                      defstrlistval:NULL,TYPE_STRINGLIST,0 }
91 92
};

93
int get_phybsize(void) {return telnetparams.phyprntbuff_size; };
94 95 96
int add_telnetcmd(char *modulename,telnetshell_vardef_t *var, telnetshell_cmddef_t *cmd );
int setoutput(char *buff, int debug, telnet_printfunc_t prnt);
int setparam(char *buff, int debug, telnet_printfunc_t prnt);
97
int history_cmd(char *buff, int debug, telnet_printfunc_t prnt);
98 99 100 101 102 103 104

telnetshell_vardef_t telnet_vardef[] = {
{"debug",TELNET_VARTYPE_INT32,&telnetparams.telnetdbg},
{"prio",TELNET_VARTYPE_INT32,&telnetparams.priority},
{"loopc",TELNET_VARTYPE_INT32,&telnetparams.loopcount},
{"loopd",TELNET_VARTYPE_INT32,&telnetparams.loopdelay},
{"phypb",TELNET_VARTYPE_INT32,&telnetparams.phyprntbuff_size},
105 106
{"hsize",TELNET_VARTYPE_INT32,&telnetparams.histsize},
{"hfile",TELNET_VARTYPE_STRING,&telnetparams.histfile},
107 108 109 110 111 112
{"",0,NULL}
};

telnetshell_cmddef_t  telnet_cmdarray[] = {
   {"redirlog","[here,file,off]",setoutput},
   {"param","[prio]",setparam},
113
   {"history","[list,reset]",history_cmd},
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
   {"","",NULL},
};


void client_printf(const char *message, ...)
{
    va_list va_args;
    
    va_start(va_args, message);
    if (telnetparams.new_socket > 0)
       {
       vsnprintf(telnetparams.msgbuff,sizeof(telnetparams.msgbuff)-1,message, va_args);
       send(telnetparams.new_socket,telnetparams.msgbuff , strlen(telnetparams.msgbuff), MSG_NOSIGNAL);
       }
    else
       {
       vprintf(message, va_args);
       }
    va_end(va_args);
    return ;
}

#define NICE_MAX 19
#define NICE_MIN -20
void set_sched(pthread_t tid, int pid, int priority)
{
int rt; 
struct sched_param schedp;
int policy;
char strpolicy[10];


//sched_get_priority_max(SCHED_FIFO)
147
if (priority < NICE_MIN) {
148 149
   policy=SCHED_FIFO;
   sprintf(strpolicy,"%s","fifo");
150 151 152 153 154 155
   schedp.sched_priority= NICE_MIN - priority ;
   if (   (schedp.sched_priority < sched_get_priority_min(SCHED_FIFO)) ||
          (schedp.sched_priority > sched_get_priority_max(SCHED_FIFO)) ) {
        client_printf("Error: %i invalid prio, should be %i to %i, \n",
                       priority, NICE_MIN -sched_get_priority_min(SCHED_FIFO),
                       NICE_MIN - sched_get_priority_max(SCHED_FIFO) );        
156
   }
157
} else if (priority > NICE_MAX) {
158 159 160
   policy=SCHED_IDLE;
   sprintf(strpolicy,"%s","idle");
   schedp.sched_priority=0;   
161
} else {
162 163 164
   policy=SCHED_OTHER;
   sprintf(strpolicy,"%s","other");
   schedp.sched_priority=0;   
165 166 167
}
 
if( tid != 0) {  
168
  rt = pthread_setschedparam(tid, policy, &schedp);
169
} else if(pid > 0)  {
170
  rt = sched_setscheduler( pid, policy,&schedp);
171 172 173 174 175 176
} else {
  rt= -1;
  client_printf("Error: no pid or tid specified\n");
}

if (rt != 0) {
177 178
    client_printf("Error %i: %s modifying sched param to %s:%i, \n",
                  errno,strerror(errno),strpolicy,schedp.sched_priority); 
179
} else  {
180
    client_printf("policy set to %s, priority %i\n",strpolicy,schedp.sched_priority);
181 182 183 184 185 186 187 188 189 190 191 192
    if ( policy==SCHED_OTHER) {
        rt = getpriority(PRIO_PROCESS,tid);
        if (rt != -1) {
           rt = setpriority(PRIO_PROCESS,tid,priority);  
           if (rt < 0) {
               client_printf("Error %i: %s trying to set nice value of thread %u to %i\n",
                             errno,strerror(errno),tid,priority); 
           }
        } else {
               client_printf("Error %i: %s trying to get nice value of thread %u \n",
                              errno,strerror(errno),tid); 
        }
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



if ( policy == SCHED_OTHER)
   {
   if ( tid > 0 && tid != pthread_self())
     {
     client_printf("setting nice value using a thread id not implemented....\n");    
     }
   else if (pid > 0)
     {
     errno=0;
     rt = setpriority(PRIO_PROCESS,pid,priority);
     if (rt != 0)
        {
        client_printf("Error %i: %s calling setpriority, \n",errno,strerror(errno)); 
        }
     else
        {
        client_printf("nice value set to %i\n",priority);
        }
     }
   }
}

void set_affinity(pthread_t tid, int pid, int coreid)
{
cpu_set_t cpuset;
int rt;

  CPU_ZERO(&cpuset);
  CPU_SET(coreid, &cpuset);
227
  if (tid > 0) {
228
     rt = pthread_setaffinity_np((pthread_t)tid, sizeof(cpu_set_t), &cpuset);
229
  } else if (pid > 0){
230
     rt = sched_setaffinity((pid_t)pid, sizeof(cpu_set_t), &cpuset);
231 232 233
  } else {
     rt= -1;
  }
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
  if (rt != 0)
      {
      client_printf("Error %i: %s calling , xxx_setaffinity...\n",errno,strerror(errno)); 
      }
  else
      {
      client_printf("thread %i affinity set to %i\n",(pid==0)?(int)tid:pid,coreid);
      }  
}
/*------------------------------------------------------------------------------------*/
/*
function implementing telnet server specific commands, parameters of the
telnet_cmdarray table
*/

void redirstd(char *newfname,telnet_printfunc_t prnt )
{
FILE *fd;
   fd=freopen(newfname, "w", stdout);
   if (fd == NULL)
      {
      prnt("ERROR: stdout redir to %s error %s",strerror(errno));
      }
   fd=freopen(newfname, "w", stderr);
   if (fd == NULL)
      {
      prnt("ERROR: stderr redir to %s error %s",strerror(errno));
      }
}
int setoutput(char *buff, int debug, telnet_printfunc_t prnt)
{

char cmds[TELNET_MAX_MSGLENGTH/TELNET_CMD_MAXSIZE][TELNET_CMD_MAXSIZE];
char *logfname;
char stdout_str[64];


#define LOGFILE "logfile.log"
memset(cmds,0,sizeof(cmds));
sscanf(buff,"%9s %32s %9s %9s %9s", cmds[0],cmds[1],cmds[2],cmds[3],cmds[4]  );
if (strncasecmp(cmds[0],"here",4) == 0)
   {
   fflush(stdout);
   sprintf(stdout_str,"/proc/%i/fd/%i",getpid(),telnetparams.new_socket);
   dup2(telnetparams.new_socket,fileno(stdout));
//   freopen(stdout_str, "w", stdout);
//   freopen(stdout_str, "w", stderr);
   dup2(telnetparams.new_socket,fileno(stderr));
   prnt("Log output redirected to this terminal (%s)\n",stdout_str);
   }
if (strncasecmp(cmds[0],"file",4) == 0)
   {
   if (cmds[1][0] == 0)
      logfname=LOGFILE;
   else
      logfname=cmds[1];   
   fflush(stdout);
   redirstd(logfname,prnt);

   }   
if (strncasecmp(cmds[0],"off",3) == 0)
   {
   fflush(stdout);
   redirstd("/dev/tty",prnt); 
   } 

return CMDSTATUS_FOUND;   
} /* setoutput */

int setparam(char *buff, int debug, telnet_printfunc_t prnt)
{
char cmds[TELNET_MAX_MSGLENGTH/TELNET_CMD_MAXSIZE][TELNET_CMD_MAXSIZE];


memset(cmds,0,sizeof(cmds));
sscanf(buff,"%9s %9s %9s %9s %9s", cmds[0],cmds[1],cmds[2],cmds[3],cmds[4]  );
if (strncasecmp(cmds[0],"prio",4) == 0)
   {
   int prio;
   prio=(int)strtol(cmds[1],NULL,0);
   if (errno == ERANGE)
       return CMDSTATUS_VARNOTFOUND;
   telnetparams.priority = prio;
   set_sched(pthread_self(),0,prio);
   return CMDSTATUS_FOUND; 
   }
if (strncasecmp(cmds[0],"aff",3) == 0)
   {
   int aff;
   aff=(int)strtol(cmds[1],NULL,0);
   if (errno == ERANGE)
       return CMDSTATUS_VARNOTFOUND;
   set_affinity(pthread_self(),0,aff);
   return CMDSTATUS_FOUND; 
   }

return CMDSTATUS_NOTFOUND;   
} /* setparam */
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

int history_cmd(char *buff, int debug, telnet_printfunc_t prnt)
{
char cmds[TELNET_MAX_MSGLENGTH/TELNET_CMD_MAXSIZE][TELNET_CMD_MAXSIZE];


memset(cmds,0,sizeof(cmds));
sscanf(buff,"%9s %9s %9s %9s %9s", cmds[0],cmds[1],cmds[2],cmds[3],cmds[4]  );
if (cmds[0] == NULL)
    return CMDSTATUS_VARNOTFOUND;
if (strncasecmp(cmds[0],"list",4) == 0)
   {
   HIST_ENTRY **hist = history_list();
   if (hist) {
      for (int i = 0; hist[i]; i++) {
          prnt ("%d: %s\n", i + history_base, hist[i]->line);
      }
   }
   return CMDSTATUS_FOUND; 
   }
if (strncasecmp(cmds[0],"reset",5) == 0)
   {
   clear_history();
   write_history(telnetparams.histfile);
   return CMDSTATUS_FOUND; 
   }

return CMDSTATUS_NOTFOUND; 
} /* history_cmd */
361 362 363 364 365 366 367 368 369
/*-------------------------------------------------------------------------------------------------------*/
/*
generic commands available for all modules loaded by the server
*/

int setgetvar(int moduleindex,char getorset,char *params)
{
int n,i;
char varname[TELNET_CMD_MAXSIZE];
370
char *varval=NULL;
371 372

   memset(varname,0,sizeof(varname));
373 374

   n = sscanf(params,"%s %ms",varname,&varval);
375 376 377 378 379 380 381 382 383 384 385
   for ( i=0 ; telnetparams.CmdParsers[moduleindex].var[i].varvalptr != NULL ; i++)
      {
      if ( strncasecmp(telnetparams.CmdParsers[moduleindex].var[i].varname,varname,strlen(telnetparams.CmdParsers[moduleindex].var[i].varname)) == 0)
         {
	 if (n > 0 && (getorset == 'g' || getorset == 'G'))
	    {
	    client_printf("%s, %s = ", telnetparams.CmdParsers[moduleindex].module,
	               telnetparams.CmdParsers[moduleindex].var[i].varname );
	    switch(telnetparams.CmdParsers[moduleindex].var[i].vartype)
	        {
		case TELNET_VARTYPE_INT32:
386 387 388 389
	             client_printf("%i\n",*(int32_t *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
		break;
		case TELNET_VARTYPE_INT64:
	             client_printf("%lli\n",*(int64_t *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
390 391 392 393 394 395 396
		break;
		case TELNET_VARTYPE_INT16:
	             client_printf("%hi\n",*(short *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
		break;	
		case TELNET_VARTYPE_DOUBLE:
	             client_printf("%g\n",*(double *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
		break;
397 398
		case TELNET_VARTYPE_STRING:
	             client_printf("\"%s\"\n",*(char **)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));						
399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422
                break;
		default:
		     client_printf("unknown type\n");
		break;
		}
	    }
	 if (n > 1 && (getorset == 's' || getorset == 'S'))
	    {
	    client_printf("%s, %s set to \n", telnetparams.CmdParsers[moduleindex].module,
	           telnetparams.CmdParsers[moduleindex].var[i].varname);
		   
	    switch(telnetparams.CmdParsers[moduleindex].var[i].vartype)
	        {
		case TELNET_VARTYPE_INT32:
		     *(int *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr) = (int)strtol(varval,NULL,0);
	             client_printf("%i\n",*(int *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
		break;
		case TELNET_VARTYPE_INT16:
		     *(short *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr) = (short)strtol(varval,NULL,0);
	             client_printf("%hi\n",*(short *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
		break;	
		case TELNET_VARTYPE_DOUBLE:
		     *(double *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr) = strtod(varval,NULL);
	             client_printf("%g\n",*(double *)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
423 424 425 426
		break;	
		case TELNET_VARTYPE_STRING:
		     sprintf(*(char **)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr),"%s", varval);
	             client_printf("\"%s\"\n",*(char **)(telnetparams.CmdParsers[moduleindex].var[i].varvalptr));
427 428 429 430 431 432 433 434
		break;				
		default:
		     client_printf("unknown type\n");
		break;
		}		   
	    }		   
	 }
      } 
435 436 437
if (n>1 && varval != NULL) {
   free(varval);
}
438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580
return CMDSTATUS_VARNOTFOUND;
}
/*----------------------------------------------------------------------------------------------------*/
char *get_time(char *buff,int bufflen)
{

struct tm  tmstruct;
time_t now = time (0);
strftime (buff, bufflen, "%Y-%m-%d %H:%M:%S.000", localtime_r(&now,&tmstruct));
return buff;
}

int process_command(char *buf)
{
int i,j,k;
char modulename[TELNET_CMD_MAXSIZE];
char cmd[TELNET_CMD_MAXSIZE];
char cmdb[TELNET_MAX_MSGLENGTH];
char *bufbck;
int rt;

memset(modulename,0,sizeof(modulename));
memset(cmd,0,sizeof(cmd));
memset(cmdb,0,sizeof(cmdb));
if (strncasecmp(buf,"ex",2) == 0)
   return CMDSTATUS_EXIT;

if (strncasecmp(buf,"help",4) == 0)
   {
   for (i=0; telnetparams.CmdParsers[i].var != NULL && telnetparams.CmdParsers[i].cmd != NULL; i++)
    {
     client_printf("   module %i = %s:\n",i,telnetparams.CmdParsers[i].module);
     for(j=0; telnetparams.CmdParsers[i].var[j].varvalptr != NULL ; j++)
        {
	client_printf("      %s [get set] %s <value>\n",
	       telnetparams.CmdParsers[i].module, telnetparams.CmdParsers[i].var[j].varname);
	} 
     for(j=0; telnetparams.CmdParsers[i].cmd[j].cmdfunc != NULL ; j++)
        {
	client_printf("      %s %s %s\n",
	       telnetparams.CmdParsers[i].module,telnetparams.CmdParsers[i].cmd[j].cmdname,
	       telnetparams.CmdParsers[i].cmd[j].helpstr);
	} 	
    }
   return CMDSTATUS_FOUND;
   }

memset(modulename,0,sizeof(modulename));
memset(cmd,0,sizeof(cmd));
memset(cmdb,0,sizeof(cmdb));  
bufbck=strdup(buf); 
rt=CMDSTATUS_NOTFOUND;   
j = sscanf(buf,"%9s %9s %[^\t\n]",modulename,cmd,cmdb);
if (telnetparams.telnetdbg > 0)
    printf("process_command: %i words, module=%s cmd=%s, parameters= %s\n",j,modulename,cmd,cmdb);   
for (i=0; j>=2 && telnetparams.CmdParsers[i].var != NULL && telnetparams.CmdParsers[i].cmd != NULL; i++)
    {
    if ( (strncasecmp(telnetparams.CmdParsers[i].module,modulename,strlen(telnetparams.CmdParsers[i].module)) == 0))
       {
        if (strncasecmp(cmd,"getall",7) == 0 )
	    { 
            for(j=0; telnetparams.CmdParsers[i].var[j].varvalptr != NULL ; j++)
               {
	       setgetvar(i,'g',telnetparams.CmdParsers[i].var[j].varname);
	       }
	    rt= CMDSTATUS_FOUND;              
	    }       
        else if (strncasecmp(cmd,"get",3) == 0 || strncasecmp(cmd,"set",3) == 0)
	    {
            rt= setgetvar(i,cmd[0],cmdb);	    
	    }	    
        else
	    {
	    for (k=0 ; telnetparams.CmdParsers[i].cmd[k].cmdfunc != NULL ; k++)
	        {
	        if (strncasecmp(cmd, telnetparams.CmdParsers[i].cmd[k].cmdname,sizeof(telnetparams.CmdParsers[i].cmd[k].cmdname)) == 0)
                   {
	           telnetparams.CmdParsers[i].cmd[k].cmdfunc(cmdb, telnetparams.telnetdbg, client_printf);
                   rt= CMDSTATUS_FOUND;
	           }
		} /* for k */
	    }/* else */
	}/* strncmp: module name test */
     else if (strncasecmp(modulename,"loop",4) == 0 )
	{
	int lc;
        int f = fcntl(telnetparams.new_socket,F_GETFL);
	fcntl (telnetparams.new_socket, F_SETFL, O_NONBLOCK | f);
	for(lc=0; lc<telnetparams.loopcount; lc++)
	   {
	   char dummybuff[20];
	   char tbuff[64];
       int rs;
	   client_printf(CSI "1J" CSI "1;10H         " STDFMT "%s %i/%i\n",
	                 get_time(tbuff,sizeof(tbuff)),lc,telnetparams.loopcount );  
       process_command(bufbck+strlen("loop")+1);
       usleep(telnetparams.loopdelay * 1000);
	   rs = read(telnetparams.new_socket,dummybuff,sizeof(dummybuff)); 
	   if ( rs > 0 )
	       {
	       break;
	       }
	   }
	fcntl (telnetparams.new_socket, F_SETFL, f);
	rt= CMDSTATUS_FOUND;	    
	} /* loop */
    } /* for i */
free(bufbck);
return rt;
}

void run_telnetsrv(void) 
{
int sock;
struct sockaddr_in name;
char buf[TELNET_MAX_MSGLENGTH];
struct sockaddr cli_addr;
unsigned int cli_len = sizeof(cli_addr);
int readc , filled;

int status;
int optval = 1;

pthread_setname_np(pthread_self(), "telnet");
set_sched(pthread_self(),0,telnetparams.priority);
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) 
    fprintf(stderr,"[TELNETSRV] Error %s on socket call\n",strerror(errno));

setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof optval);
name.sin_family = AF_INET;
if (telnetparams.listenaddr == 0)
    name.sin_addr.s_addr = INADDR_ANY;
else
    name.sin_addr.s_addr = telnetparams.listenaddr;
name.sin_port = htons((unsigned short)(telnetparams.listenport));

if(bind(sock, (void*) &name, sizeof(name))) 
     fprintf(stderr,"[TELNETSRV] Error %s on bind call\n",strerror(errno));
if(listen(sock, 1) == -1)
     fprintf(stderr,"[TELNETSRV] Error %s on listen call\n",strerror(errno));


581
using_history();
582 583 584 585 586

printf("\nInitializing telnet server...\n");
while( (telnetparams.new_socket = accept(sock, &cli_addr, &cli_len)) )
     {
     printf("[TELNETSRV] Telnet client connected....\n");
587 588
    read_history(telnetparams.histfile);
    stifle_history(telnetparams.histsize);
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
    if(telnetparams.new_socket < 0)
       fprintf(stderr,"[TELNETSRV] Error %s on accept call\n",strerror(errno));

    while(telnetparams.new_socket>0)
         {
	 filled = 0;
	 memset(buf,0,sizeof(buf));
         while(filled < ( TELNET_MAX_MSGLENGTH-1))
	     {
             readc = recv(telnetparams.new_socket, buf+filled, TELNET_MAX_MSGLENGTH-filled-1, 0);
             if(!readc)
	        break;
             filled += readc;
             if(buf[filled-1] == '\n')
	        {
		buf[filled-1] = 0;
		
	        break;
		}
             }
         if(!readc)
	   {
           printf ("[TELNETSRV] Telnet Client disconnected.\n");
           break;
           }
         if (telnetparams.telnetdbg > 0)
615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
	    printf("[TELNETSRV] Command received: readc %i filled %i \"%s\"\n", readc, filled ,buf);
         if (buf[0] == '!') {
             if (buf[1] == '!') {
         	 sprintf(buf,"%s","telnet history list");
             } else {
         	 HIST_ENTRY *hisentry = history_get(strtol(buf+1,NULL,0)); 
         	 if (hisentry) {
                     char msg[TELNET_MAX_MSGLENGTH + sizeof(TELNET_PROMPT) +10];
         	     sprintf(buf,"%s",hisentry->line);
        	     sprintf(msg,"%s %s\n",TELNET_PROMPT, hisentry->line);
                     send(telnetparams.new_socket, msg, strlen(msg), MSG_NOSIGNAL);
         	 }
             }  	 
         }
	 if (strlen(buf) > 2 )
630 631 632 633 634 635
	    {
            status=process_command(buf);
	    }
	 else
	    status=CMDSTATUS_NOCMD;
	    
636 637
         if (status != CMDSTATUS_EXIT) {
	    if (status == CMDSTATUS_NOTFOUND) {
638 639 640
	       char msg[TELNET_MAX_MSGLENGTH + 50];
	       sprintf(msg,"Error: \n      %s\n is not a softmodem command\n",buf);
	       send(telnetparams.new_socket, msg, strlen(msg), MSG_NOSIGNAL);
641 642 643
	    } else if (status == CMDSTATUS_FOUND) {
               add_history(buf);
            }
644
            send(telnetparams.new_socket, TELNET_PROMPT, sizeof(TELNET_PROMPT), MSG_NOSIGNAL);
645
	} else {
646 647
	    printf ("[TELNETSRV] Closing telnet connection...\n");
	    break;
648
	}
649
    }
650 651
    write_history(telnetparams.histfile);
    clear_history();
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
    close(telnetparams.new_socket);
    printf ("[TELNETSRV] Telnet server waitting for connection...\n");
    }
close(sock);
return;
}

/*------------------------------------------------------------------------------------------------*/
/* set_telnetmodule loads the commands delivered with the telnet server
 *
 *
 * 
*/
void exec_moduleinit(char *modname)
{
667
void (*fptr)(void);
668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
char initfunc[TELNET_CMD_MAXSIZE+9];

       if (strlen(modname) > TELNET_CMD_MAXSIZE)
	  {
          fprintf(stderr,"[TELNETSRV] module %s not loaded, name exceeds the %i size limit\n",
			 modname, TELNET_CMD_MAXSIZE);
	  return; 
          }
       sprintf(initfunc,"add_%s_cmds",modname);
       fptr = dlsym(RTLD_DEFAULT,initfunc);
       if ( fptr != NULL)
          {
          fptr();
          }
       else
          {
          fprintf(stderr,"[TELNETSRV] couldn't find %s for module %s \n",initfunc,modname);
          }
}

688
int add_embeddedmodules(void)
689
{
690
int ret=0;
691 692 693 694 695



    for(int i=0; i<telnetoptions[TELNETSRV_STATICMOD].numelt;i++)
       {
696
       ret++;
697 698
       exec_moduleinit(telnetoptions[TELNETSRV_STATICMOD].strlistptr[i]);
       }
699 700
return ret;

701 702
}

703
int add_sharedmodules(void)
704 705
{
char initfunc[TELNET_CMD_MAXSIZE+9];
706 707
void (*fptr)(void);
int ret=0;
708 709 710 711 712 713 714 715

    for(int i=0; i<telnetoptions[TELNETSRV_SHRMOD].numelt;i++)
       {
       sprintf(initfunc,"add_%s_cmds",telnetoptions[TELNETSRV_SHRMOD].strlistptr[i]);
       fptr = dlsym(RTLD_DEFAULT,initfunc);
       if ( fptr != NULL)
          {
          fptr();
716
          ret++;
717 718 719 720 721 722
          }
       else
          {
          fprintf(stderr,"[TELNETSRV] couldn't find %s for module %s \n",initfunc,telnetoptions[TELNETSRV_STATICMOD].strlistptr[i]);
          }
       }
723
    return ret;
724 725
}

726
int telnetsrv_autoinit(void)
727
 {
728

729 730 731

   memset(&telnetparams,0,sizeof(telnetparams));

732
   config_get( telnetoptions,sizeof(telnetoptions)/sizeof(paramdef_t),"telnetsrv"); 
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773

 
   if(pthread_create(&telnetparams.telnet_pthread,NULL, (void *(*)(void *))run_telnetsrv, NULL) != 0)
     {
     fprintf(stderr,"[TELNETSRV] Error %s on pthread_create call\n",strerror(errno));
     return -1;
     }
  add_telnetcmd("telnet", telnet_vardef, telnet_cmdarray);
  add_embeddedmodules();
  return 0;
 }
 
/*---------------------------------------------------------------------------------------------*/
/* add_telnetcmd is used to add a set of commands to the telnet server. A module calls this
 * function at init time. the telnet server is delivered with a set of commands which
 * will be loaded or not depending on the telnet section of the config file
*/
int add_telnetcmd(char *modulename, telnetshell_vardef_t *var, telnetshell_cmddef_t *cmd)
 {
 int i;
 if( modulename == NULL || var == NULL || cmd == NULL)
     {
     fprintf(stderr,"[TELNETSRV] Telnet server, add_telnetcmd: invalid parameters\n");
     return -1;
     }
 for (i=0; i<TELNET_MAXCMD ; i++)
     {
     if (telnetparams.CmdParsers[i].var == NULL)
        {
        strncpy(telnetparams.CmdParsers[i].module,modulename,sizeof(telnetparams.CmdParsers[i].module)-1);
        telnetparams.CmdParsers[i].cmd = cmd;
        telnetparams.CmdParsers[i].var = var;
        printf("[TELNETSRV] Telnet server: module %i = %s added to shell\n",
               i,telnetparams.CmdParsers[i].module);
        break;
        }
     }
  return 0;
 }


774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
/* function which will be called by the shared lib loader, to check shared lib version
   against main exec version. version mismatch no considered as fatal (interfaces not supposed to change)
*/ 
int  telnetsrv_checkbuildver(char * mainexec_buildversion, char ** shlib_buildversion)
{
#ifndef PACKAGE_VERSION
#define PACKAGE_VERSION "standalone built: " __DATE__ __TIME__
#endif
    *shlib_buildversion = PACKAGE_VERSION;
    if (strcmp(mainexec_buildversion, *shlib_buildversion) != 0) {
          fprintf(stderr,"[TELNETSRV] shared lib version %s, doesn't match main version %s, compatibility should be checked\n",
                mainexec_buildversion,*shlib_buildversion);
    }
    return 0;
}
789

790 791 792 793 794 795 796
int telnetsrv_getfarray(loader_shlibfunc_t  **farray)
 {
  *farray=malloc(sizeof(loader_shlibfunc_t));
  (*farray)[0].fname=TELNET_ADDCMD_FNAME;
  (*farray)[0].fptr=(int (*)(void) )add_telnetcmd;
  return 1;
 }