nlsop_server.c

   1 /*
   2  * nlsop server code
   3  *
   4  * author: frank zirkelbach (frank.zirkelbach@physik.uni-augsburg.de)
   5  *
   6  * this program tries helping to understand the amorphous depuration
   7  * and recrystallization of SiCx while ion implantation at temperatures
   8  * below 400 degree celsius.
   9  * hopefully the program will simulate the stabilization of the
  10  * selforganizing lamella structure in the observed behaviour.
  11  *
  12  * refs:
  13  *  - J. K. N. Lindner. Habil.Schrift, Universitaet Augsburg.
  14  *  - Maik Haeberlen. Diplomarbeit, Universitaet Augsburg.
  15  *
  16  * Copyright (C) 2004 Frank Zirkelbach
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  31  *
  32  */
  33
  34 #define _GNU_SOURCE
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <fcntl.h>
  41 #include <unistd.h>
  42 #include <signal.h>
  43
  44 #include "nlsop.h"
  45 #include "dfbapi.h"
  46 #include "random.h"
  47
  48 #include "network.h"
  49 #include "event.h"
  50 #include "list.h"
  51
  52 #include "nlsop_general.h"
  53
  54 /* globals */
  55 int *gi;
  56 t_net *gnet;
  57 t_event *gevent;
  58 t_list *gc_list;
  59 t_list *gg_list;
  60 int alert;
  61
  62 /*
  63  * server specific stuff
  64  */
  65
  66 int usage(char *prog)
  67 {
  68  puts("usage:");
  69  printf("%s <listen port>\n",prog);
  70  return 1;
  71 }
  72
  73 int add_node(t_net *net,t_event *event,t_list *c_list,t_list *g_list) {
  74
  75   int channel;
  76   unsigned char data;
  77   t_client client;
  78   int gui_chan;
  79
  80   channel=network_manage_incoming(net);
  81   if(channel==N_E_ACCEPT) {
  82     printf("accept failed!\n");
  83     return -1;
  84   }
  85   if(channel==N_E_MAXC) {
  86     printf("maximum connections reached!\n");
  87     return -1;
  88   }
  89   printf("connection from %s port %d (ch: %d)\n",net->connection[channel].ip,
  90                                                  net->connection[channel].port,
  91                                                  channel);
  92
  93   /* are you client or gui? */
  94   network_receive_chan(net,channel,&data,1);
  95   if(data==NLSOP_GUI) {
  96     gui_chan=channel;
  97     list_add_element(g_list,&gui_chan,sizeof(int));
  98     printf("node is a gui\n");
  99   }
 100   else if(data==NLSOP_CLIENT) {
 101     client.status=IDLE;
 102     client.channel=channel;
 103     list_add_element(c_list,&client,sizeof(t_client));
 104     printf("node is a client\n");
 105   }
 106   else {
 107     printf("not a client or gui - lets kick that ass out of here!\n");
 108     network_close(net,channel);
 109     return -1;
 110   }
 111
 112   /* if we have a new node - care for it! */
 113   event_math(net->connection[channel].fd,event,READ,ADD);
 114
 115   printf("\n");
 116
 117   return 1;
 118 }
 119
 120 int save_job(t_net *net,int channel,t_job *job,unsigned char dc) {
 121
 122   char filename[128];
 123   int fd;
 124   int ret;
 125   d3_lattice d3l;
 126   info info;
 127   unsigned char data;
 128
 129   printf("receiving data from client (%d)\n",job->size);
 130   data=DATA_OK;
 131
 132   ret=network_receive_chan(net,channel,(unsigned char *)&d3l,
 133                            sizeof(d3_lattice));
 134   network_send_chan(net,channel,&data,sizeof(unsigned char));
 135   printf("debug: got d3_lattice\n");
 136
 137   ret=network_receive_chan(net,channel,(unsigned char *)&info,sizeof(info));
 138   network_send_chan(net,channel,&data,sizeof(unsigned char));
 139   printf("debug: got info\n");
 140
 141   ret=network_receive_chan(net,channel,job->ac,job->size*sizeof(unsigned char));
 142   network_send_chan(net,channel,&data,sizeof(unsigned char));
 143   printf("debug: got ac\n");
 144
 145   ret=network_receive_chan(net,channel,(unsigned char *)job->cc,
 146                            job->size*sizeof(int));
 147   network_send_chan(net,channel,&data,sizeof(unsigned char));
 148   printf("debug: got cc\n");
 149
 150   ret=network_receive_chan(net,channel,(unsigned char *)&(job->step),
 151                            sizeof(int));
 152   network_send_chan(net,channel,&data,sizeof(unsigned char));
 153   printf("debug: got steps\n");
 154
 155   if(dc!=DC_QUIT) {
 156     snprintf(filename,128,"./data/nlsop_b%f_c%f_s%f_ds%d_dr%f_-_%d_of_%d.save",
 157              job->info.b,job->info.c,job->info.s,
 158              job->info.diff_rate,job->info.dr_ac,
 159              job->step,job->info.steps);
 160     if((fd=open(filename,O_WRONLY|O_CREAT))<0) {
 161       printf("FATAL: unable to open file %s\n",filename);
 162       return -1;
 163     }
 164
 165     if(write(fd,&d3l,sizeof(d3_lattice))<sizeof(d3_lattice)) {
 166       printf("FATAL: write of d3_lattice failed\n");
 167       return -1;
 168     }
 169
 170     if(write(fd,&info,sizeof(info))<sizeof(info)) {
 171       printf("FATAL: write of info failed\n");
 172       return -1;
 173     }
 174
 175     ret=write(fd,job->ac,job->size*sizeof(unsigned char));
 176     if(ret<job->size*sizeof(unsigned char)) {
 177       printf("FATAL: write of a/c states failed\n");
 178       return -1;
 179     }
 180
 181     ret=write(fd,job->cc,job->size*sizeof(int));
 182     if(ret<job->size*sizeof(int)) {
 183       printf("FATAL: write of c.-conc. failed\n");
 184       return -1;
 185     }
 186
 187     close(fd);
 188
 189   }
 190
 191   return 1;
 192 }
 193
 194 int add_job(t_net *net,int chan,t_list *jl) {
 195
 196   t_job job;
 197
 198   job.channel=-1;
 199   job.status=IN_QUEUE;
 200   job.progress=0;
 201
 202   network_receive_chan(net,chan,(unsigned char *)&(job.x),sizeof(int));
 203   network_receive_chan(net,chan,(unsigned char *)&(job.y),sizeof(int));
 204   network_receive_chan(net,chan,(unsigned char *)&(job.z),sizeof(int));
 205   network_receive_chan(net,chan,(unsigned char *)&(job.info),sizeof(info));
 206
 207   job.size=job.x*job.y*job.z;
 208
 209   job.ac=(unsigned char *)malloc(job.size*sizeof(unsigned char));
 210   if(job.ac==NULL) {
 211     printf("unable to malloc a/c memory\n");
 212     return -1;
 213   }
 214
 215   job.cc=(int *)malloc(job.size*sizeof(int));
 216   if(job.cc==NULL) {
 217     printf("unable to malloc cc memory\n");
 218     return -1;
 219   }
 220
 221   job.step=0;
 222
 223   list_add_element(jl,&job,sizeof(t_job));
 224
 225   printf("job added: b=%f | c=%f | s=%f ...\n",
 226          job.info.b,job.info.c,job.info.s);
 227
 228   return 1;
 229 }
 230
 231 int send_status(t_net *net,int chan,t_list *jl) {
 232
 233   unsigned char data;
 234   int count;
 235   int i;
 236
 237   data=GUI_INFO;
 238
 239   count=list_count(jl);
 240
 241   printf("sending job info\n");
 242
 243   network_send_chan(net,chan,&data,sizeof(unsigned char));
 244   network_send_chan(net,chan,(unsigned char *)&count,sizeof(int));
 245
 246   list_reset(jl);
 247   for(i=0;i<count;i++) {
 248     network_send_chan(net,chan,jl->current->data,sizeof(t_job));
 249     list_next(jl);
 250   }
 251
 252   return 1;
 253 }
 254
 255 int handle_node(t_net *net,t_event *event,
 256                 t_list *c_list,t_list *g_list,t_list *job) {
 257
 258   int i;
 259   unsigned char data;
 260   t_client *c;
 261   t_job *j;
 262
 263   gi=&i;
 264
 265   for(i=0;i<MAX_CONNECTIONS;i++) {
 266     if(FD_ISSET(net->connection[i].fd,&(event->rfds))) {
 267
 268       alert=0;
 269       alarm(1);
 270       network_receive_chan(net,i,&data,1);
 271       alarm(0);
 272
 273       if(alert==1) return -1;
 274
 275       if(list_search_data(c_list,&i,sizeof(int))==L_SUCCESS) {
 276         /* it's a client */
 277         list_search_data(job,&i,sizeof(int));
 278         j=(t_job *)job->current->data;
 279         c=(t_client *)c_list->current-data;
 280
 281         if(data==DC_END) {
 282           save_job(net,i,j,DC_END);
 283           /* reset client */
 284           c->status=IDLE;
 285           /* free job memory */
 286           free(j->ac);
 287           free(j->cc);
 288           /* delete job entry */
 289           list_del_current(job);
 290           printf("job ended, saved and removed from list.\n");
 291         }
 292
 293         if(data==DC_OK) {
 294           save_job(net,i,j,DC_OK);
 295           /* inc progress state */
 296           j->progress+=1;
 297           printf("job at next level, saved.\n");
 298         }
 299
 300         if(data==DC_QUIT) {
 301           save_job(net,i,j,DC_QUIT);
 302           /* network disconnect */
 303           event_math(net->connection[i].fd,event,READ,REMOVE);
 304           network_close(net,i);
 305           /* del from client list */
 306           list_del_current(c_list);
 307           /* change job state */
 308           j->status=IN_QUEUE;
 309           printf("client terminating, job queued, client removed.\n");
 310         }
 311       }
 312
 313       else if(list_search_data(g_list,&i,sizeof(int))==L_SUCCESS) {
 314         /* its a gui */
 315         if(data==GUI_ADDJOB) add_job(net,i,job);
 316
 317         else if(data==GUI_INFO) send_status(net,i,job);
 318
 319         else if(data==GUI_QUIT) {
 320           printf("disconnecting gui on channel %d\n",i);
 321           event_math(net->connection[i].fd,event,READ,REMOVE);
 322           network_close(net,i);
 323           list_del_current(g_list);
 324         }
 325
 326         else {
 327           printf("unknown gui command\n");
 328           return -1;
 329         }
 330       }
 331
 332       else {
 333         printf("this chan is not in client or gui list! i disconnect now!\n");
 334         event_math(net->connection[i].fd,event,READ,REMOVE);
 335         network_close(net,i);
 336       }
 337     }
 338   }
 339
 340   printf("\n");
 341
 342   return 1;
 343 }
 344
 345 int distribute_jobs(t_event *event,void *allineed) {
 346
 347   t_net *net;
 348   t_list *c_list,*g_list,*job;
 349   int count_j,count_c,min;
 350   t_job *j;
 351   t_client *c;
 352   unsigned char data;
 353   d3_lattice d3l;
 354   unsigned int addr[4];
 355
 356   memcpy(addr,allineed,4*sizeof(unsigned int));
 357
 358   net=(t_net *)addr[0];
 359   c_list=(t_list *)addr[1];
 360   g_list=(t_list *)addr[2];
 361   job=(t_list *)addr[3];
 362
 363   list_reset(job);
 364   list_reset(c_list);
 365
 366   count_j=0;
 367   count_c=0;
 368
 369   if((c_list->current==NULL)||(job->current==NULL)) return 2;
 370
 371   j=(t_job *)job->current->data;
 372   c=(t_client *)c_list->current->data;
 373   if(j->status==IN_QUEUE) count_j++;
 374   if(c->status==IDLE) count_c++;
 375
 376   while(list_next(job)!=L_NO_NEXT_ELEMENT) {
 377     j=(t_job *)job->current->data;
 378     if(j->status==IN_QUEUE) count_j++;
 379   }
 380   while(list_next(c_list)!=L_NO_NEXT_ELEMENT) {
 381     c=(t_client *)c_list->current->data;
 382     if(c->status==IDLE) count_c++;
 383   }
 384
 385   min=(count_c<count_j)?count_c:count_j;
 386
 387   if(min!=0) {
 388     printf("d: distributing jobs ...\n");
 389     printf("%d queued jobs, %d idle clients\n\n",count_j,count_c);
 390   }
 391
 392   list_reset(job);
 393   list_reset(c_list);
 394
 395   while(min) {
 396     j=(t_job *)job->current->data;
 397     c=(t_client *)c_list->current->data;
 398     while(c->status!=IDLE) {
 399       list_next(c_list);
 400       c=(t_client *)c_list->current->data;
 401     }
 402     while(j->status!=IN_QUEUE) {
 403       list_next(job);
 404       j=(t_job *)job->current->data;
 405     }
 406
 407     /* direct current job to current client */
 408     if(j->step==0) data=NLSOP_NJOB;
 409     else data=NLSOP_CJOB;
 410
 411     c->status=WORK;
 412     j->channel=c->channel;
 413     j->status=IN_WORK;
 414
 415     d3l.max_x=j->x;
 416     d3l.max_y=j->y;
 417     d3l.max_z=j->z;
 418
 419     network_send_chan(net,c->channel,&data,sizeof(unsigned char));
 420     network_send_chan(net,c->channel,(unsigned char *)&d3l,sizeof(d3_lattice));
 421     network_send_chan(net,c->channel,(unsigned char *)&(j->info),sizeof(info));
 422
 423     if(data==NLSOP_CJOB) {
 424       network_send_chan(net,c->channel,j->ac,j->size*sizeof(unsigned char));
 425       network_receive_chan(net,c->channel,&data,sizeof(unsigned char));
 426       network_send_chan(net,c->channel,(unsigned char *)&(j->cc),
 427                         j->size*sizeof(int));
 428       network_receive_chan(net,c->channel,&data,sizeof(unsigned char));
 429       network_send_chan(net,c->channel,(unsigned char *)&(j->step),sizeof(int));
 430       network_receive_chan(net,c->channel,&data,sizeof(unsigned char));
 431     }
 432
 433     --min;
 434     list_next(c_list);
 435     list_next(job);
 436   }
 437
 438   return 1;
 439 }
 440
 441 int parse_incoming(t_event *event,void *allineed) {
 442
 443   t_net *net;
 444   t_list *c_list,*g_list,*job;
 445   unsigned int addr[4];
 446
 447   memcpy(addr,allineed,4*sizeof(unsigned int));
 448
 449   net=(t_net *)addr[0];
 450   c_list=(t_list *)addr[1];
 451   g_list=(t_list *)addr[2];
 452   job=(t_list *)addr[3];
 453
 454   /* decide what to do */
 455   if(FD_ISSET(net->l_fd,&(event->rfds))) {
 456     /* new node */
 457     printf("new node ...\n");
 458     add_node(net,event,c_list,g_list);
 459   }
 460   else {
 461     /* client/gui interaction */
 462     printf("node interaction ...\n");
 463     handle_node(net,event,c_list,g_list,job);
 464   }
 465
 466   return 1;
 467 }
 468
 469 void destroy_it(int signum) {
 470
 471   printf("connection to client (ch %d) fucked up!\n",*gi);
 472   event_math(gnet->connection[*gi].fd,gevent,READ,REMOVE);
 473   network_close(gnet,*gi);
 474   if(list_search_data(gc_list,gi,sizeof(int))==L_SUCCESS) {
 475     list_del_current(gc_list);
 476     printf("removed client from list\n");
 477   }
 478   if(list_search_data(gg_list,gi,sizeof(int))==L_SUCCESS) {
 479     list_del_current(gg_list);
 480     printf("removed gui from list\n");
 481   }
 482
 483   alert=1;
 484   alarm(0);
 485
 486 }
 487
 488 /*
 489  * main program
 490  */
 491
 492 int main(int argc,char **argv)
 493 {
 494
 495   int port;
 496   t_net net;
 497   t_event event;
 498   t_list c_list;
 499   t_list g_list;
 500   t_list job;
 501   void *allyouneed;
 502   unsigned int addr[4];
 503
 504   gnet=&net;
 505   gevent=&event;
 506   gc_list=&c_list;
 507   gg_list=&g_list;
 508
 509   /* tzzz ... */
 510   allyouneed=(void *)addr;
 511   addr[0]=(unsigned int)&net;
 512   addr[1]=(unsigned int)&c_list;
 513   addr[2]=(unsigned int)&g_list;
 514   addr[3]=(unsigned int)&job;
 515
 516   /* default values */
 517   port=1025;
 518
 519   /* parse argv */
 520   if(argc==2) port=atoi(argv[1]);
 521
 522   /* event init */
 523   event_init(&event,1);
 524   /* 10 sec event timeout - distributing jobs */
 525   event_set_timeout(&event,10,0);
 526
 527   /* list init */
 528   list_init(&c_list,1);
 529   list_init(&g_list,1);
 530   list_init(&job,1);
 531
 532   /* connect to server */
 533   network_init(&net,1);
 534   network_set_listen_port(&net,port);
 535   if(network_listen(&net)!=N_SUCCESS) {
 536     printf("unable to listen on port %d, aborting!\n",port);
 537     return -1;
 538   }
 539
 540   /* install sighandler */
 541   signal(SIGALRM,destroy_it);
 542
 543   /* wait for events :) */
 544   event_math(net.l_fd,&event,READ,ADD);
 545   printf("\nNLSOP_SERVER started!\n\n");
 546   event_start(&event,allyouneed,parse_incoming,distribute_jobs);
 547
 548   return 1;
 549 }
 550