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