daemon/transfer.c

   1 /*
   2  *  Dolda Connect - Modular multiuser Direct Connect-style client
   3  *  Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com)
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <fcntl.h>
  24 #include <signal.h>
  25 #include <pwd.h>
  26 #include <grp.h>
  27 #include <errno.h>
  28 #include <sys/wait.h>
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include <config.h>
  32 #endif
  33 #include "log.h"
  34 #include "utils.h"
  35 #include "sysevents.h"
  36 #include "auth.h"
  37 #include "transfer.h"
  38 #include "module.h"
  39 #include "client.h"
  40
  41 static void killfilter(struct transfer *transfer);
  42
  43 struct transfer *transfers = NULL;
  44 int numtransfers = 0;
  45 GCBCHAIN(newtransfercb, struct transfer *);
  46
  47 void freetransfer(struct transfer *transfer)
  48 {
  49     struct transarg *ta;
  50
  51     if(transfer == transfers)
  52         transfers = transfer->next;
  53     if(transfer->next != NULL)
  54         transfer->next->prev = transfer->prev;
  55     if(transfer->prev != NULL)
  56         transfer->prev->next = transfer->next;
  57     CBCHAINDOCB(transfer, trans_destroy, transfer);
  58     CBCHAINFREE(transfer, trans_ac);
  59     CBCHAINFREE(transfer, trans_act);
  60     CBCHAINFREE(transfer, trans_p);
  61     CBCHAINFREE(transfer, trans_destroy);
  62     CBCHAINFREE(transfer, trans_filterout);
  63     while((ta = transfer->args) != NULL)
  64     {
  65         transfer->args = ta->next;
  66         free(ta->rec);
  67         free(ta->val);
  68         free(ta);
  69     }
  70     if(transfer->filter != -1)
  71         killfilter(transfer);
  72     if(transfer->etimer != NULL)
  73         canceltimer(transfer->etimer);
  74     if(transfer->auth != NULL)
  75         authputhandle(transfer->auth);
  76     if(transfer->peerid != NULL)
  77         free(transfer->peerid);
  78     if(transfer->peernick != NULL)
  79         free(transfer->peernick);
  80     if(transfer->path != NULL)
  81         free(transfer->path);
  82     if(transfer->actdesc != NULL)
  83         free(transfer->actdesc);
  84     if(transfer->filterbuf != NULL)
  85         free(transfer->filterbuf);
  86     if(transfer->hash != NULL)
  87         freehash(transfer->hash);
  88     if(transfer->localend != NULL)
  89     {
  90         transfer->localend->readcb = NULL;
  91         transfer->localend->writecb = NULL;
  92         transfer->localend->errcb = NULL;
  93         putsock(transfer->localend);
  94     }
  95     if(transfer->filterout != NULL)
  96     {
  97         transfer->filterout->readcb = NULL;
  98         transfer->filterout->writecb = NULL;
  99         transfer->filterout->errcb = NULL;
 100         putsock(transfer->filterout);
 101     }
 102     if(transfer->fn != NULL)
 103         putfnetnode(transfer->fn);
 104     free(transfer);
 105     numtransfers--;
 106 }
 107
 108 struct transfer *newtransfer(void)
 109 {
 110     struct transfer *new;
 111     static int curid = 0;
 112
 113     new = smalloc(sizeof(*new));
 114     memset(new, 0, sizeof(*new));
 115     new->id = curid++;
 116     new->size = -1;
 117     new->endpos = -1;
 118     new->filter = -1;
 119     CBCHAININIT(new, trans_ac);
 120     CBCHAININIT(new, trans_act);
 121     CBCHAININIT(new, trans_p);
 122     CBCHAININIT(new, trans_destroy);
 123     CBCHAININIT(new, trans_filterout);
 124     new->next = NULL;
 125     new->prev = NULL;
 126     time(&new->activity);
 127     numtransfers++;
 128     return(new);
 129 }
 130
 131 void transferaddarg(struct transfer *transfer, wchar_t *rec, wchar_t *val)
 132 {
 133     struct transarg *ta;
 134
 135     ta = smalloc(sizeof(*ta));
 136     ta->rec = swcsdup(rec);
 137     ta->val = swcsdup(val);
 138     ta->next = transfer->args;
 139     transfer->args = ta;
 140 }
 141
 142 void transferattach(struct transfer *transfer, struct transferiface *iface, void *data)
 143 {
 144     if(transfer->iface != NULL)
 145         transferdetach(transfer);
 146     transfer->iface = iface;
 147     transfer->ifacedata = data;
 148 }
 149
 150 void transferdetach(struct transfer *transfer)
 151 {
 152     if(transfer->iface != NULL)
 153     {
 154         transfer->iface->detach(transfer, transfer->ifacedata);
 155         transfer->iface = NULL;
 156         transfer->ifacedata = NULL;
 157     }
 158 }
 159
 160 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data)
 161 {
 162     struct transfer *transfer;
 163
 164     transfer = newtransfer();
 165     if(fnet != NULL)
 166         transfer->fnet = fnet;
 167     else
 168         transfer->fnet = fn->fnet;
 169     transfer->peerid = swcsdup(nickid);
 170     transfer->state = TRNS_HS;
 171     transfer->dir = TRNSD_UP;
 172     if(fn != NULL)
 173         getfnetnode(transfer->fn = fn);
 174     transferattach(transfer, iface, data);
 175     linktransfer(transfer);
 176     bumptransfer(transfer);
 177     return(transfer);
 178 }
 179
 180 void linktransfer(struct transfer *transfer)
 181 {
 182     transfer->next = transfers;
 183     transfer->prev = NULL;
 184     if(transfers != NULL)
 185         transfers->prev = transfer;
 186     transfers = transfer;
 187     GCBCHAINDOCB(newtransfercb, transfer);
 188 }
 189
 190 void resettransfer(struct transfer *transfer)
 191 {
 192     if(transfer->dir == TRNSD_DOWN)
 193     {
 194         if(transfer->iface != NULL)
 195             transferdetach(transfer);
 196         killfilter(transfer);
 197         transfersetstate(transfer, TRNS_WAITING);
 198         transfersetactivity(transfer, L"reset");
 199         return;
 200     }
 201 }
 202
 203 struct transfer *findtransfer(int id)
 204 {
 205     struct transfer *transfer;
 206
 207     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 208     {
 209         if(transfer->id == id)
 210             break;
 211     }
 212     return(transfer);
 213 }
 214
 215 static void transexpire(int cancelled, struct transfer *transfer)
 216 {
 217     transfer->etimer = NULL;
 218     if(!cancelled)
 219         bumptransfer(transfer);
 220     else
 221         transfer->timeout = 0;
 222 }
 223
 224 static void transferread(struct socket *sk, struct transfer *transfer)
 225 {
 226     if(sockgetdatalen(sk) >= 65536)
 227         sk->ignread = 1;
 228     if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL))
 229         transfer->iface->gotdata(transfer, transfer->ifacedata);
 230 }
 231
 232 static void transferwrite(struct socket *sk, struct transfer *transfer)
 233 {
 234     if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL))
 235         transfer->iface->wantdata(transfer, transfer->ifacedata);
 236 }
 237
 238 static void transfererr(struct socket *sk, int errno, struct transfer *transfer)
 239 {
 240     if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
 241         transfer->iface->endofdata(transfer, transfer->ifacedata);
 242 }
 243
 244 void transferputdata(struct transfer *transfer, void *buf, size_t size)
 245 {
 246     time(&transfer->activity);
 247     sockqueue(transfer->localend, buf, size);
 248     transfer->curpos += size;
 249     CBCHAINDOCB(transfer, trans_p, transfer);
 250 }
 251
 252 void transferendofdata(struct transfer *transfer)
 253 {
 254     if(transfer->curpos >= transfer->size)
 255     {
 256         transfersetstate(transfer, TRNS_DONE);
 257         transfer->localend->readcb = NULL;
 258         transfer->localend->writecb = NULL;
 259         transfer->localend->errcb = NULL;
 260         putsock(transfer->localend);
 261         transfer->localend = NULL;
 262     } else {
 263         resettransfer(transfer);
 264     }
 265 }
 266
 267 size_t transferdatasize(struct transfer *transfer)
 268 {
 269     return(sockqueuesize(transfer->localend));
 270 }
 271
 272 void *transfergetdata(struct transfer *transfer, size_t *size)
 273 {
 274     void *buf;
 275
 276     if(transfer->localend == NULL)
 277         return(NULL);
 278     transfer->localend->ignread = 0;
 279     time(&transfer->activity);
 280     if((buf = sockgetinbuf(transfer->localend, size)) == NULL)
 281         return(NULL);
 282     if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos))
 283     {
 284         *size = transfer->endpos - transfer->curpos;
 285         buf = srealloc(buf, *size);
 286     }
 287     transfer->curpos += *size;
 288     CBCHAINDOCB(transfer, trans_p, transfer);
 289     return(buf);
 290 }
 291
 292 void transferprepul(struct transfer *transfer, size_t size, size_t start, size_t end, struct socket *lesk)
 293 {
 294     transfersetsize(transfer, size);
 295     transfer->curpos = start;
 296     transfer->endpos = end;
 297     lesk->ignread = 1;
 298     transfersetlocalend(transfer, lesk);
 299 }
 300
 301 void transferstartul(struct transfer *transfer, struct socket *sk)
 302 {
 303     transfersetstate(transfer, TRNS_MAIN);
 304     socksettos(sk, confgetint("transfer", "ultos"));
 305     if(transfer->localend != NULL)
 306         transfer->localend->ignread = 0;
 307 }
 308
 309 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
 310 {
 311     if(transfer->localend != NULL)
 312         putsock(transfer->localend);
 313     getsock(transfer->localend = sk);
 314     sk->data = transfer;
 315     sk->readcb = (void (*)(struct socket *, void *))transferread;
 316     sk->writecb = (void (*)(struct socket *, void *))transferwrite;
 317     sk->errcb = (void (*)(struct socket *, int, void *))transfererr;
 318 }
 319
 320 void bumptransfer(struct transfer *transfer)
 321 {
 322     struct fnetnode *fn;
 323     struct fnetpeer *peer;
 324     time_t now;
 325
 326     if((now = time(NULL)) < transfer->timeout)
 327     {
 328         if(transfer->etimer == NULL)
 329             transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
 330         return;
 331     }
 332     if(transfer->etimer != NULL)
 333         canceltimer(transfer->etimer);
 334     switch(transfer->state)
 335     {
 336     case TRNS_WAITING:
 337         if(transfer->fn != NULL)
 338         {
 339             fn = transfer->fn;
 340             if(fn->state != FNN_EST)
 341             {
 342                 transfer->close = 1;
 343                 return;
 344             }
 345             peer = fnetfindpeer(fn, transfer->peerid);
 346         } else {
 347             peer = NULL;
 348             for(fn = fnetnodes; fn != NULL; fn = fn->next)
 349             {
 350                 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
 351                     break;
 352             }
 353         }
 354         transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
 355         if(now - transfer->lastreq > 30)
 356         {
 357             if(peer != NULL)
 358             {
 359                 fn->fnet->reqconn(peer);
 360                 time(&transfer->lastreq);
 361             }
 362         }
 363         break;
 364     case TRNS_HS:
 365         if(transfer->dir == TRNSD_UP)
 366         {
 367             if(now - transfer->activity < 60)
 368                 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
 369             else
 370                 transfer->close = 1;
 371         } else if(transfer->dir == TRNSD_DOWN) {
 372             if(now - transfer->activity < 60)
 373                 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
 374             else
 375                 resettransfer(transfer);
 376         }
 377         break;
 378     case TRNS_MAIN:
 379         if(transfer->dir == TRNSD_UP)
 380         {
 381             if(now - transfer->activity < 300)
 382                 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
 383             else
 384                 transfer->close = 1;
 385         }
 386         break;
 387     }
 388 }
 389
 390 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
 391 {
 392     time(&transfer->activity);
 393     if(desc != NULL)
 394     {
 395         if(transfer->actdesc != NULL)
 396             free(transfer->actdesc);
 397         transfer->actdesc = swcsdup(desc);
 398     }
 399     bumptransfer(transfer);
 400     CBCHAINDOCB(transfer, trans_act, transfer);
 401 }
 402
 403 void transfersetstate(struct transfer *transfer, int newstate)
 404 {
 405     transfer->state = newstate;
 406     if(transfer->etimer != NULL)
 407         canceltimer(transfer->etimer);
 408     transfersetactivity(transfer, NULL);
 409     CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
 410 }
 411
 412 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
 413 {
 414     if(transfer->peernick != NULL)
 415         free(transfer->peernick);
 416     transfer->peernick = swcsdup(newnick);
 417     CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
 418 }
 419
 420 void transfersetsize(struct transfer *transfer, int newsize)
 421 {
 422     transfer->size = newsize;
 423     CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
 424 }
 425
 426 void transferseterror(struct transfer *transfer, int error)
 427 {
 428     transfer->error = error;
 429     CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
 430 }
 431
 432 void transfersetpath(struct transfer *transfer, wchar_t *path)
 433 {
 434     if(transfer->path != NULL)
 435         free(transfer->path);
 436     transfer->path = swcsdup(path);
 437     CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
 438 }
 439
 440 int slotsleft(void)
 441 {
 442     struct transfer *transfer;
 443     int slots;
 444
 445     slots = confgetint("transfer", "slots");
 446     for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
 447     {
 448         if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
 449             slots--;
 450     }
 451     return(slots);
 452 }
 453
 454 static void killfilter(struct transfer *transfer)
 455 {
 456     if(transfer->filter != -1)
 457     {
 458         kill(-transfer->filter, SIGHUP);
 459         transfer->filter = -1;
 460     }
 461     if(transfer->localend)
 462     {
 463         transfer->localend->readcb = NULL;
 464         transfer->localend->writecb = NULL;
 465         transfer->localend->errcb = NULL;
 466         putsock(transfer->localend);
 467         transfer->localend = NULL;
 468     }
 469     if(transfer->filterout)
 470     {
 471         transfer->filterout->readcb = NULL;
 472         putsock(transfer->filterout);
 473         transfer->filterout = NULL;
 474     }
 475     if(transfer->filterbuf)
 476     {
 477         free(transfer->filterbuf);
 478         transfer->filterbuf = NULL;
 479     }
 480     transfer->filterbufsize = transfer->filterbufdata = 0;
 481 }
 482
 483 static char *findfilter(struct passwd *pwd)
 484 {
 485     char *path, *filtername;
 486
 487     if((path = sprintf2("%s/.dcdl-filter", pwd->pw_dir)) != NULL)
 488     {
 489         if(!access(path, X_OK))
 490             return(path);
 491         free(path);
 492     }
 493     if((filtername = icwcstombs(confgetstr("transfer", "filter"), NULL)) == NULL)
 494     {
 495         flog(LOG_WARNING, "could not convert filter name into local charset: %s", strerror(errno));
 496     } else {
 497         if(strchr(filtername, '/') == NULL)
 498         {
 499             if((path = sprintf2("/etc/%s", filtername)) != NULL)
 500             {
 501                 if(!access(path, X_OK))
 502                 {
 503                     free(filtername);
 504                     return(path);
 505                 }
 506                 free(path);
 507             }
 508             if((path = sprintf2("/usr/etc/%s", filtername)) != NULL)
 509             {
 510                 if(!access(path, X_OK))
 511                 {
 512                     free(filtername);
 513                     return(path);
 514                 }
 515                 free(path);
 516             }
 517             if((path = sprintf2("/usr/local/etc/%s", filtername)) != NULL)
 518             {
 519                 if(!access(path, X_OK))
 520                 {
 521                     free(filtername);
 522                     return(path);
 523                 }
 524                 free(path);
 525             }
 526         } else {
 527             if(!access(filtername, X_OK))
 528                 return(filtername);
 529         }
 530         free(filtername);
 531     }
 532     return(NULL);
 533 }
 534
 535 static void filterread(struct socket *sk, struct transfer *transfer)
 536 {
 537     char *buf, *p, *p2;
 538     size_t bufsize;
 539     wchar_t *cmd, *arg;
 540
 541     if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
 542         return;
 543     bufcat(transfer->filterbuf, buf, bufsize);
 544     free(buf);
 545     if((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
 546     {
 547         *(p++) = 0;
 548         if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
 549             *(p2++) = 0;
 550         if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
 551         {
 552             arg = NULL;
 553             if(p2 != NULL)
 554             {
 555                 if((arg = icmbstowcs(p2, NULL)) == NULL)
 556                     flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
 557             }
 558             CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
 559             if(arg != NULL)
 560                 free(arg);
 561             free(cmd);
 562         } else {
 563             flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
 564         }
 565         memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
 566     }
 567 }
 568
 569 static void filterexit(pid_t pid, int status, void *data)
 570 {
 571     struct transfer *transfer;
 572
 573     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 574     {
 575         if(transfer->filter == pid)
 576         {
 577             transfer->filter = -1;
 578             killfilter(transfer);
 579             if(WEXITSTATUS(status))
 580             {
 581                 resettransfer(transfer);
 582             } else {
 583                 freetransfer(transfer);
 584             }
 585             break;
 586         }
 587     }
 588 }
 589
 590 int forkfilter(struct transfer *transfer)
 591 {
 592     char *filtername, *filename, *peerid, *buf;
 593     wchar_t *wfilename;
 594     struct passwd *pwent;
 595     pid_t pid;
 596     int inpipe, outpipe;
 597     char **argv;
 598     size_t argvsize, argvdata;
 599     struct socket *insock, *outsock;
 600     struct transarg *ta;
 601     char *rec, *val;
 602
 603     wfilename = transfer->path;
 604     if(transfer->fnet->filebasename != NULL)
 605         wfilename = transfer->fnet->filebasename(wfilename);
 606     if(transfer->auth == NULL)
 607     {
 608         flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
 609         errno = EACCES;
 610         return(-1);
 611     }
 612     if((pwent = getpwuid(transfer->owner)) == NULL)
 613     {
 614         flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
 615         errno = EACCES;
 616         return(-1);
 617     }
 618     if((filtername = findfilter(pwent)) == NULL)
 619     {
 620         flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
 621         errno = ENOENT;
 622         return(-1);
 623     }
 624     if((filename = icwcstombs(wfilename, NULL)) == NULL)
 625     {
 626         if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
 627         {
 628             flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
 629             return(-1);
 630         }
 631         filename = sprintf2("utf8-%s", buf);
 632         free(buf);
 633     }
 634     if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
 635     {
 636         if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
 637         {
 638             flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
 639             free(filename);
 640             return(-1);
 641         }
 642         peerid = sprintf2("utf8-%s", buf);
 643         free(buf);
 644     }
 645     if((pid = forksess(transfer->owner, transfer->auth, filterexit, NULL, FD_PIPE, 0, O_WRONLY, &inpipe, FD_PIPE, 1, O_RDONLY, &outpipe, FD_FILE, 2, O_RDWR, "/dev/null", FD_END)) < 0)
 646     {
 647         flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
 648         return(-1);
 649     }
 650     if(pid == 0)
 651     {
 652         argv = NULL;
 653         argvsize = argvdata = 0;
 654         buf = sprintf2("%i", transfer->size);
 655         addtobuf(argv, filtername);
 656         addtobuf(argv, filename);
 657         addtobuf(argv, buf);
 658         addtobuf(argv, peerid);
 659         for(ta = transfer->args; ta != NULL; ta = ta->next)
 660         {
 661             if((rec = icwcstombs(ta->rec, NULL)) == NULL)
 662                 continue;
 663             if((val = icwcstombs(ta->val, NULL)) == NULL)
 664                 continue;
 665             addtobuf(argv, rec);
 666             addtobuf(argv, val);
 667         }
 668         addtobuf(argv, NULL);
 669         execv(filtername, argv);
 670         flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
 671         exit(127);
 672     }
 673     insock = wrapsock(inpipe);
 674     outsock = wrapsock(outpipe);
 675     /* Really, really strange thing here - sometimes the kernel would
 676      * return POLLIN on insock, even though it's a write-side
 677      * pipe. The corresponding read on the pipe naturally returns
 678      * EBADF, causing doldacond to think there's something wrong with
 679      * the fd, and thus it closes it. Until I can find out whyever the
 680      * kernel gives a POLLIN on the fd (if I can at all...), I'll just
 681      * set ignread on insock for now. */
 682     insock->ignread = 1;
 683     transfer->filter = pid;
 684     transfersetlocalend(transfer, insock);
 685     getsock(transfer->filterout = outsock);
 686     outsock->data = transfer;
 687     outsock->readcb = (void (*)(struct socket *, void *))filterread;
 688     putsock(insock);
 689     putsock(outsock);
 690     free(filtername);
 691     free(filename);
 692     free(peerid);
 693     return(0);
 694 }
 695
 696 static int run(void)
 697 {
 698     struct transfer *transfer, *next;
 699
 700     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 701     {
 702         if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
 703         {
 704             if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
 705                 transfer->iface->endofdata(transfer, transfer->ifacedata);
 706             closesock(transfer->localend);
 707         }
 708     }
 709     for(transfer = transfers; transfer != NULL; transfer = next)
 710     {
 711         next = transfer->next;
 712         if(transfer->close)
 713         {
 714             transferdetach(transfer);
 715             freetransfer(transfer);
 716             continue;
 717         }
 718     }
 719     return(0);
 720 }
 721
 722 static struct configvar myvars[] =
 723 {
 724     {CONF_VAR_INT, "slots", {.num = 3}},
 725     {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
 726     {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
 727     {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
 728     {CONF_VAR_END}
 729 };
 730
 731 static struct module me =
 732 {
 733     .conf =
 734     {
 735         .vars = myvars
 736     },
 737     .name = "transfer",
 738     .run = run
 739 };
 740
 741 MODULE(me);