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 #include <stdint.h>
  30
  31 #ifdef HAVE_CONFIG_H
  32 #include <config.h>
  33 #endif
  34 #include "log.h"
  35 #include "utils.h"
  36 #include "sysevents.h"
  37 #include "auth.h"
  38 #include "transfer.h"
  39 #include "module.h"
  40 #include "client.h"
  41
  42 static void killfilter(struct transfer *transfer);
  43
  44 unsigned long long bytesupload = 0;
  45 unsigned long long bytesdownload = 0;
  46 struct transfer *transfers = NULL;
  47 int numtransfers = 0;
  48 GCBCHAIN(newtransfercb, struct transfer *);
  49
  50 void freetransfer(struct transfer *transfer)
  51 {
  52     if(transfer == transfers)
  53         transfers = transfer->next;
  54     if(transfer->next != NULL)
  55         transfer->next->prev = transfer->prev;
  56     if(transfer->prev != NULL)
  57         transfer->prev->next = transfer->next;
  58     CBCHAINDOCB(transfer, trans_destroy, transfer);
  59     CBCHAINFREE(transfer, trans_ac);
  60     CBCHAINFREE(transfer, trans_act);
  61     CBCHAINFREE(transfer, trans_p);
  62     CBCHAINFREE(transfer, trans_destroy);
  63     CBCHAINFREE(transfer, trans_filterout);
  64     while(transfer->args != NULL)
  65         freewcspair(transfer->args, &transfer->args);
  66     if(transfer->filter != -1)
  67         killfilter(transfer);
  68     if(transfer->etimer != NULL)
  69         canceltimer(transfer->etimer);
  70     if(transfer->auth != NULL)
  71         authputhandle(transfer->auth);
  72     if(transfer->peerid != NULL)
  73         free(transfer->peerid);
  74     if(transfer->peernick != NULL)
  75         free(transfer->peernick);
  76     if(transfer->path != NULL)
  77         free(transfer->path);
  78     if(transfer->actdesc != NULL)
  79         free(transfer->actdesc);
  80     if(transfer->filterbuf != NULL)
  81         free(transfer->filterbuf);
  82     if(transfer->hash != NULL)
  83         freehash(transfer->hash);
  84     if(transfer->exitstatus != NULL)
  85         free(transfer->exitstatus);
  86     if(transfer->localend != NULL)
  87     {
  88         transfer->localend->readcb = NULL;
  89         transfer->localend->writecb = NULL;
  90         transfer->localend->errcb = NULL;
  91         putsock(transfer->localend);
  92     }
  93     if(transfer->filterout != NULL)
  94     {
  95         transfer->filterout->readcb = NULL;
  96         transfer->filterout->writecb = NULL;
  97         transfer->filterout->errcb = NULL;
  98         putsock(transfer->filterout);
  99     }
 100     if(transfer->fn != NULL)
 101         putfnetnode(transfer->fn);
 102     free(transfer);
 103     numtransfers--;
 104 }
 105
 106 struct transfer *newtransfer(void)
 107 {
 108     struct transfer *new;
 109     static int curid = 0;
 110
 111     new = smalloc(sizeof(*new));
 112     memset(new, 0, sizeof(*new));
 113     new->id = curid++;
 114     new->size = -1;
 115     new->endpos = -1;
 116     new->filter = -1;
 117     CBCHAININIT(new, trans_ac);
 118     CBCHAININIT(new, trans_act);
 119     CBCHAININIT(new, trans_p);
 120     CBCHAININIT(new, trans_destroy);
 121     CBCHAININIT(new, trans_filterout);
 122     new->next = NULL;
 123     new->prev = NULL;
 124     time(&new->activity);
 125     numtransfers++;
 126     return(new);
 127 }
 128
 129 static void localread(struct socket *sk, struct transfer *transfer)
 130 {
 131     void *buf;
 132     size_t blen;
 133
 134     if((transfer->datapipe != NULL) && (sockqueueleft(transfer->datapipe) > 0)) {
 135         buf = sockgetinbuf(sk, &blen);
 136         sockqueue(transfer->datapipe, buf, blen);
 137         free(buf);
 138         time(&transfer->activity);
 139         transfer->curpos += blen;
 140         bytesupload += blen;
 141         CBCHAINDOCB(transfer, trans_p, transfer);
 142     }
 143 }
 144
 145 static void dataread(struct socket *sk, struct transfer *transfer)
 146 {
 147     void *buf;
 148     size_t blen;
 149
 150     if((transfer->localend != NULL) && (sockqueueleft(transfer->localend) > 0)) {
 151         buf = sockgetinbuf(sk, &blen);
 152         sockqueue(transfer->localend, buf, blen);
 153         free(buf);
 154         transfer->curpos += blen;
 155         bytesdownload += blen;
 156         CBCHAINDOCB(transfer, trans_p, transfer);
 157     }
 158 }
 159
 160 static void localwrite(struct socket *sk, struct transfer *transfer)
 161 {
 162     if(transfer->datapipe != NULL)
 163         dataread(transfer->datapipe, transfer);
 164 }
 165
 166 static void datawrite(struct socket *sk, struct transfer *transfer)
 167 {
 168     if(transfer->localend != NULL)
 169         localread(transfer->localend, transfer);
 170 }
 171
 172 static void localerr(struct socket *sk, int errno, struct transfer *transfer)
 173 {
 174     if(transfer->datapipe != NULL)
 175         closesock(transfer->datapipe);
 176 }
 177
 178 static void dataerr(struct socket *sk, int errno, struct transfer *transfer)
 179 {
 180     if(transfer->curpos >= transfer->size) {
 181         transfersetstate(transfer, TRNS_DONE);
 182         closesock(transfer->localend);
 183         quitsock(transfer->localend);
 184         transfer->localend = NULL;
 185     } else {
 186         resettransfer(transfer);
 187     }
 188 }
 189
 190 void transferattach(struct transfer *transfer, struct socket *dpipe)
 191 {
 192     transferdetach(transfer);
 193     getsock(transfer->datapipe = dpipe);
 194     dpipe->readcb = (void (*)(struct socket *, void *))dataread;
 195     dpipe->writecb = (void (*)(struct socket *, void *))datawrite;
 196     dpipe->errcb = (void (*)(struct socket *, int, void *))dataerr;
 197     dpipe->data = transfer;
 198 }
 199
 200 void transferdetach(struct transfer *transfer)
 201 {
 202     if(transfer->datapipe != NULL) {
 203         closesock(transfer->datapipe);
 204         quitsock(transfer->datapipe);
 205     }
 206     transfer->datapipe = NULL;
 207 }
 208
 209 struct transfer *finddownload(wchar_t *peerid)
 210 {
 211     struct transfer *transfer;
 212
 213     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 214     {
 215         if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
 216             break;
 217     }
 218     return(transfer);
 219 }
 220
 221 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
 222 {
 223     struct transfer *transfer;
 224
 225     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 226     {
 227         if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
 228             break;
 229     }
 230     return(transfer);
 231 }
 232
 233 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
 234 {
 235     struct transfer *transfer;
 236
 237     transfer = newtransfer();
 238     if(fnet != NULL)
 239         transfer->fnet = fnet;
 240     else
 241         transfer->fnet = fn->fnet;
 242     transfer->peerid = swcsdup(nickid);
 243     transfer->state = TRNS_HS;
 244     transfer->dir = TRNSD_UP;
 245     if(fn != NULL)
 246         getfnetnode(transfer->fn = fn);
 247     transferattach(transfer, dpipe);
 248     linktransfer(transfer);
 249     bumptransfer(transfer);
 250     return(transfer);
 251 }
 252
 253 void linktransfer(struct transfer *transfer)
 254 {
 255     transfer->next = transfers;
 256     transfer->prev = NULL;
 257     if(transfers != NULL)
 258         transfers->prev = transfer;
 259     transfers = transfer;
 260     GCBCHAINDOCB(newtransfercb, transfer);
 261 }
 262
 263 void resettransfer(struct transfer *transfer)
 264 {
 265     if(transfer->dir == TRNSD_DOWN)
 266     {
 267         transferdetach(transfer);
 268         killfilter(transfer);
 269         transfersetstate(transfer, TRNS_WAITING);
 270         transfersetactivity(transfer, L"reset");
 271         return;
 272     }
 273 }
 274
 275 struct transfer *findtransfer(int id)
 276 {
 277     struct transfer *transfer;
 278
 279     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 280     {
 281         if(transfer->id == id)
 282             break;
 283     }
 284     return(transfer);
 285 }
 286
 287 static void transexpire(int cancelled, struct transfer *transfer)
 288 {
 289     transfer->etimer = NULL;
 290     if(!cancelled)
 291         bumptransfer(transfer);
 292     else
 293         transfer->timeout = 0;
 294 }
 295
 296 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
 297 {
 298     transfersetsize(transfer, size);
 299     transfer->curpos = start;
 300     transfer->endpos = end;
 301     transfersetlocalend(transfer, lesk);
 302 }
 303
 304 void transferstartdl(struct transfer *transfer, struct socket *sk)
 305 {
 306     transfersetstate(transfer, TRNS_MAIN);
 307     socksettos(sk, confgetint("transfer", "dltos"));
 308 }
 309
 310 void transferstartul(struct transfer *transfer, struct socket *sk)
 311 {
 312     transfersetstate(transfer, TRNS_MAIN);
 313     socksettos(sk, confgetint("transfer", "ultos"));
 314     if(transfer->localend != NULL)
 315         localread(transfer->localend, transfer);
 316 }
 317
 318 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
 319 {
 320     if(transfer->localend != NULL)
 321         putsock(transfer->localend);
 322     getsock(transfer->localend = sk);
 323     sk->data = transfer;
 324     sk->readcb = (void (*)(struct socket *, void *))localread;
 325     sk->writecb = (void (*)(struct socket *, void *))localwrite;
 326     sk->errcb = (void (*)(struct socket *, int, void *))localerr;
 327 }
 328
 329 static int tryreq(struct transfer *transfer)
 330 {
 331     struct fnetnode *fn;
 332     struct fnetpeer *peer;
 333
 334     if((fn = transfer->fn) != NULL)
 335     {
 336         if(fn->state != FNN_EST)
 337         {
 338             transfer->close = 1;
 339             return(1);
 340         }
 341         peer = fnetfindpeer(fn, transfer->peerid);
 342     } else {
 343         peer = NULL;
 344         for(fn = fnetnodes; fn != NULL; fn = fn->next)
 345         {
 346             if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
 347                 break;
 348         }
 349     }
 350     if(peer != NULL)
 351     {
 352         time(&transfer->lastreq);
 353         return(fn->fnet->reqconn(peer));
 354     }
 355     return(1);
 356 }
 357
 358 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
 359 {
 360     struct transfer *transfer;
 361
 362     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 363     {
 364         if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
 365         {
 366             if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
 367             {
 368                 if(!tryreq(transfer))
 369                     return;
 370             }
 371         }
 372     }
 373 }
 374
 375 void bumptransfer(struct transfer *transfer)
 376 {
 377     time_t now;
 378
 379     if((now = time(NULL)) < transfer->timeout)
 380     {
 381
 382         if(transfer->etimer == NULL)
 383             transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
 384         return;
 385     }
 386     if(transfer->etimer != NULL)
 387         canceltimer(transfer->etimer);
 388     switch(transfer->state)
 389     {
 390     case TRNS_WAITING:
 391         transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
 392         if(now - transfer->lastreq > 30)
 393             tryreq(transfer);
 394         break;
 395     case TRNS_HS:
 396         if(transfer->dir == TRNSD_UP)
 397         {
 398             if(now - transfer->activity < 60)
 399                 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
 400             else
 401                 transfer->close = 1;
 402         } else if(transfer->dir == TRNSD_DOWN) {
 403             if(now - transfer->activity < 60)
 404                 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
 405             else
 406                 resettransfer(transfer);
 407         }
 408         break;
 409     case TRNS_MAIN:
 410         if(transfer->dir == TRNSD_UP)
 411         {
 412             if(now - transfer->activity < 300)
 413                 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
 414             else
 415                 transfer->close = 1;
 416         }
 417         break;
 418     }
 419 }
 420
 421 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
 422 {
 423     time(&transfer->activity);
 424     if(desc != NULL)
 425     {
 426         if(transfer->actdesc != NULL)
 427             free(transfer->actdesc);
 428         transfer->actdesc = swcsdup(desc);
 429     }
 430     bumptransfer(transfer);
 431     CBCHAINDOCB(transfer, trans_act, transfer);
 432 }
 433
 434 void transfersetstate(struct transfer *transfer, int newstate)
 435 {
 436     transfer->state = newstate;
 437     if(transfer->etimer != NULL)
 438         canceltimer(transfer->etimer);
 439     transfersetactivity(transfer, NULL);
 440     CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
 441 }
 442
 443 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
 444 {
 445     if(transfer->peernick != NULL)
 446         free(transfer->peernick);
 447     transfer->peernick = swcsdup(newnick);
 448     CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
 449 }
 450
 451 void transfersetsize(struct transfer *transfer, off_t newsize)
 452 {
 453     transfer->size = newsize;
 454     CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
 455 }
 456
 457 void transferseterror(struct transfer *transfer, int error)
 458 {
 459     transfer->error = error;
 460     CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
 461 }
 462
 463 void transfersetpath(struct transfer *transfer, wchar_t *path)
 464 {
 465     if(transfer->path != NULL)
 466         free(transfer->path);
 467     transfer->path = swcsdup(path);
 468     CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
 469 }
 470
 471 void transfersethash(struct transfer *transfer, struct hash *hash)
 472 {
 473     if(transfer->hash != NULL)
 474         freehash(transfer->hash);
 475     transfer->hash = hash;
 476     CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
 477 }
 478
 479 int slotsleft(void)
 480 {
 481     struct transfer *transfer;
 482     int slots;
 483
 484     slots = confgetint("transfer", "slots");
 485     for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
 486     {
 487         if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
 488             slots--;
 489     }
 490     return(slots);
 491 }
 492
 493 static void killfilter(struct transfer *transfer)
 494 {
 495     if(transfer->filter != -1)
 496     {
 497         kill(-transfer->filter, SIGHUP);
 498         transfer->filter = -1;
 499     }
 500     if(transfer->localend)
 501     {
 502         transfer->localend->readcb = NULL;
 503         transfer->localend->writecb = NULL;
 504         transfer->localend->errcb = NULL;
 505         putsock(transfer->localend);
 506         transfer->localend = NULL;
 507     }
 508     if(transfer->filterout)
 509     {
 510         transfer->filterout->readcb = NULL;
 511         putsock(transfer->filterout);
 512         transfer->filterout = NULL;
 513     }
 514     if(transfer->filterbuf)
 515     {
 516         free(transfer->filterbuf);
 517         transfer->filterbuf = NULL;
 518     }
 519     transfer->filterbufsize = transfer->filterbufdata = 0;
 520 }
 521
 522 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
 523 {
 524     if(!wcscmp(cmd, L"status")) {
 525         if(arg == NULL)
 526             arg = L"";
 527         if(transfer->exitstatus != NULL)
 528             free(transfer->exitstatus);
 529         transfer->exitstatus = swcsdup(arg);
 530     }
 531 }
 532
 533 static void filterread(struct socket *sk, struct transfer *transfer)
 534 {
 535     char *buf, *p, *p2;
 536     size_t bufsize;
 537     wchar_t *cmd, *arg;
 538
 539     if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
 540         return;
 541     bufcat(transfer->filterbuf, buf, bufsize);
 542     free(buf);
 543     while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
 544     {
 545         *(p++) = 0;
 546         if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
 547             *(p2++) = 0;
 548         if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
 549         {
 550             arg = NULL;
 551             if(p2 != NULL)
 552             {
 553                 if((arg = icmbstowcs(p2, NULL)) == NULL)
 554                     flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
 555             }
 556             handletranscmd(transfer, cmd, arg);
 557             CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
 558             if(arg != NULL)
 559                 free(arg);
 560             free(cmd);
 561         } else {
 562             flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
 563         }
 564         memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
 565     }
 566 }
 567
 568 static void filterexit(pid_t pid, int status, void *data)
 569 {
 570     struct transfer *transfer;
 571     struct fnet *fnet;
 572     wchar_t *peerid;
 573
 574     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 575     {
 576         if(transfer->filter == pid)
 577         {
 578             transfer->filter = -1;
 579             killfilter(transfer);
 580             fnet = transfer->fnet;
 581             peerid = swcsdup(transfer->peerid);
 582             if(WEXITSTATUS(status))
 583                 resettransfer(transfer);
 584             else
 585                 freetransfer(transfer);
 586             trytransferbypeer(fnet, peerid);
 587             free(peerid);
 588             break;
 589         }
 590     }
 591 }
 592
 593 int forkfilter(struct transfer *transfer)
 594 {
 595     char *filtername, *filename, *peerid, *buf, *p;
 596     wchar_t *wfilename;
 597     struct passwd *pwent;
 598     pid_t pid;
 599     int inpipe, outpipe;
 600     char **argv;
 601     size_t argvsize, argvdata;
 602     struct socket *insock, *outsock;
 603     struct wcspair *ta;
 604     char *rec, *val;
 605
 606     wfilename = fnfilebasename(transfer->path);
 607     if(transfer->auth == NULL)
 608     {
 609         flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
 610         errno = EACCES;
 611         return(-1);
 612     }
 613     if((pwent = getpwuid(transfer->owner)) == NULL)
 614     {
 615         flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
 616         errno = EACCES;
 617         return(-1);
 618     }
 619     filtername = findfile("dc-filter", pwent->pw_dir, 0);
 620     if(filtername == NULL)
 621         filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
 622     if(filtername == NULL)
 623     {
 624         flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
 625         errno = ENOENT;
 626         return(-1);
 627     }
 628     if((filename = icwcstombs(wfilename, NULL)) == NULL)
 629     {
 630         if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
 631         {
 632             flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
 633             return(-1);
 634         }
 635         filename = sprintf2("utf8-%s", buf);
 636         free(buf);
 637     }
 638     if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
 639     {
 640         if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
 641         {
 642             flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
 643             free(filename);
 644             return(-1);
 645         }
 646         peerid = sprintf2("utf8-%s", buf);
 647         free(buf);
 648     }
 649     for(p = filename; *p; p++) {
 650         if(*p == '/')
 651             *p = '_';
 652         else if((p == filename) && (*p == '.'))
 653             *p = '_';
 654     }
 655     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)
 656     {
 657         flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
 658         return(-1);
 659     }
 660     if(pid == 0)
 661     {
 662         argv = NULL;
 663         argvsize = argvdata = 0;
 664         buf = sprintf2("%ji", (intmax_t)transfer->size);
 665         addtobuf(argv, filtername);
 666         addtobuf(argv, filename);
 667         addtobuf(argv, buf);
 668         addtobuf(argv, peerid);
 669         if(transfer->hash)
 670         {
 671             if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
 672             {
 673                 /* XXX: I am very doubtful of this, but it can just as
 674                  * well be argued that all data should be presented as
 675                  * key-value pairs. */
 676                 addtobuf(argv, "hash");
 677                 addtobuf(argv, buf);
 678             } else {
 679                 flog(LOG_WARNING, "could not convert hash to local charset");
 680             }
 681         }
 682         for(ta = transfer->args; ta != NULL; ta = ta->next)
 683         {
 684             if((rec = icwcstombs(ta->key, NULL)) == NULL)
 685                 continue;
 686             if((val = icwcstombs(ta->val, NULL)) == NULL)
 687                 continue;
 688             addtobuf(argv, rec);
 689             addtobuf(argv, val);
 690         }
 691         addtobuf(argv, NULL);
 692         execv(filtername, argv);
 693         flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
 694         exit(127);
 695     }
 696     insock = wrapsock(inpipe);
 697     outsock = wrapsock(outpipe);
 698     /* Really, really strange thing here - sometimes the kernel would
 699      * return POLLIN on insock, even though it's a write-side
 700      * pipe. The corresponding read on the pipe naturally returns
 701      * EBADF, causing doldacond to think there's something wrong with
 702      * the fd, and thus it closes it. Until I can find out whyever the
 703      * kernel gives a POLLIN on the fd (if I can at all...), I'll just
 704      * set ignread on insock for now. */
 705 /*     sockblock(insock, 1); */
 706     transfer->filter = pid;
 707     transfersetlocalend(transfer, insock);
 708     getsock(transfer->filterout = outsock);
 709     outsock->data = transfer;
 710     outsock->readcb = (void (*)(struct socket *, void *))filterread;
 711     putsock(insock);
 712     putsock(outsock);
 713     free(filtername);
 714     free(filename);
 715     free(peerid);
 716     return(0);
 717 }
 718
 719 static int run(void)
 720 {
 721     struct transfer *transfer, *next;
 722
 723     /*
 724     for(transfer = transfers; transfer != NULL; transfer = transfer->next)
 725     {
 726         if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
 727         {
 728             if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
 729                 transfer->iface->endofdata(transfer, transfer->ifacedata);
 730             closesock(transfer->localend);
 731         }
 732     }
 733     */
 734     for(transfer = transfers; transfer != NULL; transfer = next)
 735     {
 736         next = transfer->next;
 737         if(transfer->close)
 738         {
 739             transferdetach(transfer);
 740             freetransfer(transfer);
 741             continue;
 742         }
 743     }
 744     return(0);
 745 }
 746
 747 static struct configvar myvars[] =
 748 {
 749     /** The maximum number of simultaneously permitted uploads. A
 750      * common hub rule is that you will need at least as many slots as
 751      * the number of hubs to which you are connected. */
 752     {CONF_VAR_INT, "slots", {.num = 3}},
 753     /** The TOS value to use for upload connections (see the TOS
 754      * VALUES section). */
 755     {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
 756     /** The TOS value to use for download connections (see the TOS
 757      * VALUES section). */
 758     {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
 759     /** The name of the filter script (see the FILES section for
 760      * lookup information). */
 761     {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
 762     /** If true, only one upload is allowed per remote peer. This
 763      * option is still experimental, so it is recommended to leave it
 764      * off. */
 765     {CONF_VAR_BOOL, "ulquota", {.num = 0}},
 766     {CONF_VAR_END}
 767 };
 768
 769 static struct module me =
 770 {
 771     .conf =
 772     {
 773         .vars = myvars
 774     },
 775     .name = "transfer",
 776     .run = run
 777 };
 778
 779 MODULE(me);