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,&d3l,sizeof(d3_lattice));
 133   network_send_chan(net,channel,&data,sizeof(unsigned char));
 134   printf("debug: got d3_lattice\n");
 135
 136   ret=network_receive_chan(net,channel,&info,sizeof(info));
 137   network_send_chan(net,channel,&data,sizeof(unsigned char));
 138   printf("debug: got info\n");
 139
 140   ret=network_receive_chan(net,channel,job->ac,job->size*sizeof(unsigned char));
 141   network_send_chan(net,channel,&data,sizeof(unsigned char));
 142   printf("debug: got ac\n");
 143
 144   ret=network_receive_chan(net,channel,(unsigned char *)job->cc,
 145                            job->size*sizeof(int));
 146   network_send_chan(net,channel,&data,sizeof(unsigned char));
 147   printf("debug: got cc\n");
 148
 149   ret=network_receive_chan(net,channel,(unsigned char *)&(job->step),
 150                            sizeof(int));
 151   network_send_chan(net,channel,&data,sizeof(unsigned char));
 152   printf("debug: got steps\n");
 153
 154   if(dc!=DC_QUIT) {
 155     snprintf(filename,128,"./data/nlsop_b%f_c%f_s%f_ds%d_dr%f_-_%d_of_%d.save",
 156              job->info.b,job->info.c,job->info.s,
 157              job->info.diff_rate,job->info.dr_ac,
 158              job->step,job->info.steps);
 159     if((fd=open(filename,O_WRONLY|O_CREAT))<0) {
 160       printf("FATAL: unable to open file %s\n",filename);
 161       return -1;
 162     }
 163
 164     if(write(fd,&d3l,sizeof(d3_lattice))<sizeof(d3_lattice)) {
 165       printf("FATAL: write of d3_lattice failed\n");
 166       return -1;
 167     }
 168
 169     if(write(fd,&info,sizeof(info))<sizeof(info)) {
 170       printf("FATAL: write of info failed\n");
 171       return -1;
 172     }
 173
 174     ret=write(fd,job->ac,job->size*sizeof(unsigned char));
 175     if(ret<job->size*sizeof(unsigned char)) {
 176       printf("FATAL: write of a/c states failed\n");
 177       return -1;
 178     }
 179
 180     ret=write(fd,job->cc,job->size*sizeof(int));
 181     if(ret<job->size*sizeof(int)) {
 182       printf("FATAL: write of c.-conc. failed\n");
 183       return -1;
 184     }
 185
 186     close(fd);
 187
 188   }
 189
 190   return 1;
 191 }
 192
 193 int add_job(t_net *net,int chan,t_list *jl) {
 194
 195   t_job job;
 196
 197   job.channel=-1;
 198   job.status=IN_QUEUE;
 199   job.progress=0;
 200
 201   network_receive_chan(net,chan,(unsigned char *)&(job.x),sizeof(int));
 202   network_receive_chan(net,chan,(unsigned char *)&(job.y),sizeof(int));
 203   network_receive_chan(net,chan,(unsigned char *)&(job.z),sizeof(int));
 204   network_receive_chan(net,chan,(unsigned char *)&(job.info),sizeof(info));
 205
 206   job.size=job.x*job.y*job.z;
 207
 208   job.ac=(unsigned char *)malloc(job.size*sizeof(unsigned char));
 209   if(job.ac==NULL) {
 210     printf("unable to malloc a/c memory\n");
 211     return -1;
 212   }
 213
 214   job.cc=(int *)malloc(job.size*sizeof(int));
 215   if(job.cc==NULL) {
 216     printf("unable to malloc cc memory\n");
 217     return -1;
 218   }
 219
 220   job.step=0;
 221
 222   list_add_element(jl,&job,sizeof(t_job));
 223
 224   printf("job added: b=%f | c=%f | s=%f ...\n",
 225          job.info.b,job.info.c,job.info.s);
 226
 227   return 1;
 228 }
 229
 230 int send_status(t_net *net,int chan,t_list *jl) {
 231
 232   unsigned char data;
 233   int count;
 234   int i;
 235
 236   data=GUI_INFO;
 237
 238   count=list_count(jl);
 239
 240   printf("sending job info\n");
 241
 242   network_send_chan(net,chan,&data,sizeof(unsigned char));
 243   network_send_chan(net,chan,(unsigned char *)&count,sizeof(int));
 244
 245   list_reset(jl);
 246   for(i=0;i<count;i++) {
 247     network_send_chan(net,chan,jl->current->data,sizeof(t_job));
 248     list_next(jl);
 249   }
 250
 251   return 1;
 252 }
 253
 254 int handle_node(t_net *net,t_event *event,
 255                 t_list *c_list,t_list *g_list,t_list *job) {
 256
 257   int i;
 258   unsigned char data;
 259   t_client *c;
 260   t_job *j;
 261
 262   gi=&i;
 263
 264   for(i=0;i<MAX_CONNECTIONS;i++) {
 265     if(FD_ISSET(net->connection[i].fd,&(event->rfds))) {
 266
 267       alert=0;
 268       alarm(1);
 269       network_receive_chan(net,i,&data,1);
 270       alarm(0);
 271
 272       if(alert==1) return -1;
 273
 274       if(list_search_data(c_list,&i,sizeof(int))==L_SUCCESS) {
 275         /* it's a client */
 276         list_search_data(job,&i,sizeof(int));
 277         j=(t_job *)job->current->data;
 278         c=(t_client *)c_list->current-data;
 279
 280         if(data==DC_END) {
 281           save_job(net,i,j,DC_END);
 282           /* reset client */
 283           c->status=IDLE;
 284           /* free job memory */
 285           free(j->ac);
 286           free(j->cc);
 287           /* delete job entry */
 288           list_del_current(job);
 289           printf("job ended, saved and removed from list.\n");
 290         }
 291
 292         if(data==DC_OK) {
 293           save_job(net,i,j,DC_OK);
 294           /* inc progress state */
 295           j->progress+=1;
 296           printf("job at next level, saved.\n");
 297         }
 298
 299         if(data==DC_QUIT) {
 300           save_job(net,i,j,DC_QUIT);
 301           /* network disconnect */
 302           event_math(net->connection[i].fd,event,READ,REMOVE);
 303           network_close(net,i);
 304           /* del from client list */
 305           list_del_current(c_list);
 306           /* change job state */
 307           j->status=IN_QUEUE;
 308           printf("client terminating, job queued, client removed.\n");
 309         }
 310       }
 311
 312       else if(list_search_data(g_list,&i,sizeof(int))==L_SUCCESS) {
 313         /* its a gui */
 314         if(data==GUI_ADDJOB) add_job(net,i,job);
 315
 316         else if(data==GUI_INFO) send_status(net,i,job);
 317
 318         else if(data==GUI_QUIT) {
 319           printf("disconnecting gui on channel %d\n",i);
 320           event_math(net->connection[i].fd,event,READ,REMOVE);
 321           network_close(net,i);
 322           list_del_current(g_list);
 323         }
 324
 325         else {
 326           printf("unknown gui command\n");
 327           return -1;
 328         }
 329       }
 330
 331       else {
 332         printf("this chan is not in client or gui list! i disconnect now!\n");
 333         event_math(net->connection[i].fd,event,READ,REMOVE);
 334         network_close(net,i);
 335       }
 336     }
 337   }
 338
 339   printf("\n");
 340
 341   return 1;
 342 }
 343
 344 int distribute_jobs(t_event *event,void *allineed) {
 345
 346   t_net *net;
 347   t_list *c_list,*g_list,*job;
 348   int count_j,count_c,min;
 349   t_job *j;
 350   t_client *c;
 351   unsigned char data;
 352   d3_lattice d3l;
 353   unsigned int addr[4];
 354
 355   memcpy(addr,allineed,4*sizeof(unsigned int));
 356
 357   net=(t_net *)addr[0];
 358   c_list=(t_list *)addr[1];
 359   g_list=(t_list *)addr[2];
 360   job=(t_list *)addr[3];
 361
 362   list_reset(job);
 363   list_reset(c_list);
 364
 365   count_j=0;
 366   count_c=0;
 367
 368   if((c_list->current==NULL)||(job->current==NULL)) return 2;
 369
 370   j=(t_job *)job->current->data;
 371   c=(t_client *)c_list->current->data;
 372   if(j->status==IN_QUEUE) count_j++;
 373   if(c->status==IDLE) count_c++;
 374
 375   while(list_next(job)!=L_NO_NEXT_ELEMENT) {
 376     j=(t_job *)job->current->data;
 377     if(j->status==IN_QUEUE) count_j++;
 378   }
 379   while(list_next(c_list)!=L_NO_NEXT_ELEMENT) {
 380     c=(t_client *)c_list->current->data;
 381     if(c->status==IDLE) count_c++;
 382   }
 383
 384   min=(count_c<count_j)?count_c:count_j;
 385
 386   if(min!=0) {
 387     printf("d: distributing jobs ...\n");
 388     printf("%d queued jobs, %d idle clients\n\n",count_j,count_c);
 389   }
 390
 391   list_reset(job);
 392   list_reset(c_list);
 393
 394   while(min) {
 395     j=(t_job *)job->current->data;
 396     c=(t_client *)c_list->current->data;
 397     while(c->status!=IDLE) {
 398       list_next(c_list);
 399       c=(t_client *)c_list->current->data;
 400     }
 401     while(j->status!=IN_QUEUE) {
 402       list_next(job);
 403       j=(t_job *)job->current->data;
 404     }
 405
 406     /* direct current job to current client */
 407     if(j->step==0) data=NLSOP_NJOB;
 408     else data=NLSOP_CJOB;
 409
 410     c->status=WORK;
 411     j->channel=c->channel;
 412     j->status=IN_WORK;
 413
 414     d3l.max_x=j->x;
 415     d3l.max_y=j->y;
 416     d3l.max_z=j->z;
 417
 418     network_send_chan(net,c->channel,&data,sizeof(unsigned char));
 419     network_send_chan(net,c->channel,(unsigned char *)&d3l,sizeof(d3_lattice));
 420     network_send_chan(net,c->channel,(unsigned char *)&(j->info),sizeof(info));
 421
 422     if(data==NLSOP_CJOB) {
 423       network_send_chan(net,c->channel,j->ac,j->size*sizeof(unsigned char));
 424       network_receive_chan(net,c->channel,&data,sizeof(unsigned char));
 425       network_send_chan(net,c->channel,(unsigned char *)&(j->cc),
 426                         j->size*sizeof(int));
 427       network_receive_chan(net,c->channel,&data,sizeof(unsigned char));
 428       network_send_chan(net,c->channel,(unsigned char *)&(j->step),sizeof(int));
 429       network_receive_chan(net,c->channel,&data,sizeof(unsigned char));
 430     }
 431
 432     --min;
 433     list_next(c_list);
 434     list_next(job);
 435   }
 436
 437   return 1;
 438 }
 439
 440 int parse_incoming(t_event *event,void *allineed) {
 441
 442   t_net *net;
 443   t_list *c_list,*g_list,*job;
 444   unsigned int addr[4];
 445
 446   memcpy(addr,allineed,4*sizeof(unsigned int));
 447
 448   net=(t_net *)addr[0];
 449   c_list=(t_list *)addr[1];
 450   g_list=(t_list *)addr[2];
 451   job=(t_list *)addr[3];
 452
 453   /* decide what to do */
 454   if(FD_ISSET(net->l_fd,&(event->rfds))) {
 455     /* new node */
 456     printf("new node ...\n");
 457     add_node(net,event,c_list,g_list);
 458   }
 459   else {
 460     /* client/gui interaction */
 461     printf("node interaction ...\n");
 462     handle_node(net,event,c_list,g_list,job);
 463   }
 464
 465   return 1;
 466 }
 467
 468 void destroy_it(int signum) {
 469
 470   printf("connection to client (ch %d) fucked up!\n",*gi);
 471   event_math(gnet->connection[*gi].fd,gevent,READ,REMOVE);
 472   network_close(gnet,*gi);
 473   if(list_search_data(gc_list,gi,sizeof(int))==L_SUCCESS) {
 474     list_del_current(gc_list);
 475     printf("removed client from list\n");
 476   }
 477   if(list_search_data(gg_list,gi,sizeof(int))==L_SUCCESS) {
 478     list_del_current(gg_list);
 479     printf("removed gui from list\n");
 480   }
 481
 482   alert=1;
 483   alarm(0);
 484
 485 }
 486
 487 /*
 488  * main program
 489  */
 490
 491 int main(int argc,char **argv)
 492 {
 493
 494   int port;
 495   t_net net;
 496   t_event event;
 497   t_list c_list;
 498   t_list g_list;
 499   t_list job;
 500   void *allyouneed;
 501   unsigned int addr[4];
 502
 503   gnet=&net;
 504   gevent=&event;
 505   gc_list=&c_list;
 506   gg_list=&g_list;
 507
 508   /* tzzz ... */
 509   allyouneed=(void *)addr;
 510   addr[0]=(unsigned int)&net;
 511   addr[1]=(unsigned int)&c_list;
 512   addr[2]=(unsigned int)&g_list;
 513   addr[3]=(unsigned int)&job;
 514
 515   /* default values */
 516   port=1025;
 517
 518   /* parse argv */
 519   if(argc==2) port=atoi(argv[1]);
 520
 521   /* event init */
 522   event_init(&event,1);
 523   /* 10 sec event timeout - distributing jobs */
 524   event_set_timeout(&event,10,0);
 525
 526   /* list init */
 527   list_init(&c_list,1);
 528   list_init(&g_list,1);
 529   list_init(&job,1);
 530
 531   /* connect to server */
 532   network_init(&net,1);
 533   network_set_listen_port(&net,port);
 534   if(network_listen(&net)!=N_SUCCESS) {
 535     printf("unable to listen on port %d, aborting!\n",port);
 536     return -1;
 537   }
 538
 539   /* install sighandler */
 540   signal(SIGALRM,destroy_it);
 541
 542   /* wait for events :) */
 543   event_math(net.l_fd,&event,READ,ADD);
 544   printf("\nNLSOP_SERVER started!\n\n");
 545   event_start(&event,allyouneed,parse_incoming,distribute_jobs);
 546
 547   return 1;
 548 }
 549