citadel/modules/network/serv_netspool.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2011 by the citadel.org team
   6  *
   7  *  This program is open source software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  22  * This is a fairly high-level type of critical section.  It ensures that no
  23  * two threads work on the netconfigs files at the same time.  Since we do
  24  * so many things inside these, here are the rules:
  25  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  26  *  2. Do *not* perform any I/O with the client during these sections.
  27  *
  28  */
  29
  30 /*
  31  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  32  * requests that have not been confirmed will be deleted.
  33  */
  34 #define EXP     259200  /* three days */
  35
  36 #include "sysdep.h"
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39 #include <stdio.h>
  40 #include <fcntl.h>
  41 #include <ctype.h>
  42 #include <signal.h>
  43 #include <pwd.h>
  44 #include <errno.h>
  45 #include <sys/stat.h>
  46 #include <sys/types.h>
  47 #include <dirent.h>
  48 #if TIME_WITH_SYS_TIME
  49 # include <sys/time.h>
  50 # include <time.h>
  51 #else
  52 # if HAVE_SYS_TIME_H
  53 #  include <sys/time.h>
  54 # else
  55 #  include <time.h>
  56 # endif
  57 #endif
  58 #ifdef HAVE_SYSCALL_H
  59 # include <syscall.h>
  60 #else
  61 # if HAVE_SYS_SYSCALL_H
  62 #  include <sys/syscall.h>
  63 # endif
  64 #endif
  65
  66 #include <sys/wait.h>
  67 #include <string.h>
  68 #include <limits.h>
  69 #include <libcitadel.h>
  70 #include "citadel.h"
  71 #include "server.h"
  72 #include "citserver.h"
  73 #include "support.h"
  74 #include "config.h"
  75 #include "user_ops.h"
  76 #include "database.h"
  77 #include "msgbase.h"
  78 #include "internet_addressing.h"
  79 #include "serv_network.h"
  80 #include "clientsocket.h"
  81 #include "file_ops.h"
  82 #include "citadel_dirs.h"
  83 #include "threads.h"
  84
  85 #ifndef HAVE_SNPRINTF
  86 #include "snprintf.h"
  87 #endif
  88
  89 #include "context.h"
  90 #include "netconfig.h"
  91 #include "netspool.h"
  92 #include "netmail.h"
  93 #include "ctdl_module.h"
  94
  95 /*
  96  * Learn topology from path fields
  97  */
  98 void network_learn_topology(char *node, char *path, NetMap *the_netmap, int *netmap_changed) {
  99         char nexthop[256];
 100         NetMap *nmptr;
 101
 102         strcpy(nexthop, "");
 103
 104         if (num_tokens(path, '!') < 3) return;
 105         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 106                 if (!strcasecmp(nmptr->nodename, node)) {
 107                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
 108                         nmptr->lastcontact = time(NULL);
 109                         (*netmap_changed) ++;
 110                         return;
 111                 }
 112         }
 113
 114         /* If we got here then it's not in the map, so add it. */
 115         nmptr = (NetMap *) malloc(sizeof (NetMap));
 116         strcpy(nmptr->nodename, node);
 117         nmptr->lastcontact = time(NULL);
 118         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
 119         nmptr->next = the_netmap;
 120         the_netmap = nmptr;
 121         (*netmap_changed) ++;
 122 }
 123
 124
 125
 126
 127 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 128 {
 129         FILE *fp;
 130         char instr[SIZ];
 131         char buf[SIZ];
 132         char nodename[256];
 133         char roomname[ROOMNAMELEN];
 134         size_t miscsize = 0;
 135         size_t linesize = 0;
 136         int skipthisline = 0;
 137         namelist *nptr = NULL;
 138         maplist *mptr = NULL;
 139         SpoolControl *sc;
 140
 141         fp = fopen(filename, "r");
 142         if (fp == NULL) {
 143                 return 0;
 144         }
 145         sc = malloc(sizeof(SpoolControl));
 146         memset(sc, 0, sizeof(SpoolControl));
 147         *scc = sc;
 148
 149         while (fgets(buf, sizeof buf, fp) != NULL) {
 150                 buf[strlen(buf)-1] = 0;
 151
 152                 extract_token(instr, buf, 0, '|', sizeof instr);
 153                 if (!strcasecmp(instr, strof(lastsent))) {
 154                         sc->lastsent = extract_long(buf, 1);
 155                 }
 156                 else if (!strcasecmp(instr, strof(listrecp))) {
 157                         nptr = (namelist *)
 158                                 malloc(sizeof(namelist));
 159                         nptr->next = sc->listrecps;
 160                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 161                         sc->listrecps = nptr;
 162                 }
 163                 else if (!strcasecmp(instr, strof(participate))) {
 164                         nptr = (namelist *)
 165                                 malloc(sizeof(namelist));
 166                         nptr->next = sc->participates;
 167                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 168                         sc->participates = nptr;
 169                 }
 170                 else if (!strcasecmp(instr, strof(digestrecp))) {
 171                         nptr = (namelist *)
 172                                 malloc(sizeof(namelist));
 173                         nptr->next = sc->digestrecps;
 174                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 175                         sc->digestrecps = nptr;
 176                 }
 177                 else if (!strcasecmp(instr, strof(ignet_push_share))) {
 178                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 179                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 180                         mptr = (maplist *) malloc(sizeof(maplist));
 181                         mptr->next = sc->ignet_push_shares;
 182                         strcpy(mptr->remote_nodename, nodename);
 183                         strcpy(mptr->remote_roomname, roomname);
 184                         sc->ignet_push_shares = mptr;
 185                 }
 186                 else {
 187                         /* Preserve 'other' lines ... *unless* they happen to
 188                          * be subscribe/unsubscribe pendings with expired
 189                          * timestamps.
 190                          */
 191                         skipthisline = 0;
 192                         if (!strncasecmp(buf, strof(subpending)"|", 11)) {
 193                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 194                                         skipthisline = 1;
 195                                 }
 196                         }
 197                         if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
 198                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 199                                         skipthisline = 1;
 200                                 }
 201                         }
 202
 203                         if (skipthisline == 0) {
 204                                 linesize = strlen(buf);
 205                                 sc->misc = realloc(sc->misc,
 206                                         (miscsize + linesize + 2) );
 207                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 208                                 miscsize = miscsize + linesize + 1;
 209                         }
 210                 }
 211
 212
 213         }
 214         fclose(fp);
 215         return 1;
 216 }
 217
 218 void free_spoolcontrol_struct(SpoolControl **scc)
 219 {
 220         SpoolControl *sc;
 221         namelist *nptr = NULL;
 222         maplist *mptr = NULL;
 223
 224         sc = *scc;
 225         while (sc->listrecps != NULL) {
 226                 nptr = sc->listrecps->next;
 227                 free(sc->listrecps);
 228                 sc->listrecps = nptr;
 229         }
 230         /* Do the same for digestrecps */
 231         while (sc->digestrecps != NULL) {
 232                 nptr = sc->digestrecps->next;
 233                 free(sc->digestrecps);
 234                 sc->digestrecps = nptr;
 235         }
 236         /* Do the same for participates */
 237         while (sc->participates != NULL) {
 238                 nptr = sc->participates->next;
 239                 free(sc->participates);
 240                 sc->participates = nptr;
 241         }
 242         while (sc->ignet_push_shares != NULL) {
 243                 mptr = sc->ignet_push_shares->next;
 244                 free(sc->ignet_push_shares);
 245                 sc->ignet_push_shares = mptr;
 246         }
 247         free(sc->misc);
 248         free(sc);
 249         *scc=NULL;
 250 }
 251
 252 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 253 {
 254         char tempfilename[PATH_MAX];
 255         int TmpFD;
 256         SpoolControl *sc;
 257         namelist *nptr = NULL;
 258         maplist *mptr = NULL;
 259         long len;
 260         time_t unixtime;
 261         struct timeval tv;
 262         long reltid; /* if we don't have SYS_gettid, use "random" value */
 263         StrBuf *Cfg;
 264         int rc;
 265
 266         len = strlen(filename);
 267         memcpy(tempfilename, filename, len + 1);
 268
 269
 270 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 271         reltid = syscall(SYS_gettid);
 272 #endif
 273         gettimeofday(&tv, NULL);
 274         /* Promote to time_t; types differ on some OSes (like darwin) */
 275         unixtime = tv.tv_sec;
 276
 277         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 278         sc = *scc;
 279         errno = 0;
 280         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 281         Cfg = NewStrBuf();
 282         if ((TmpFD < 0) || (errno != 0)) {
 283                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 284                         filename, strerror(errno));
 285                 free_spoolcontrol_struct(scc);
 286                 unlink(tempfilename);
 287         }
 288         else {
 289                 fchown(TmpFD, config.c_ctdluid, 0);
 290                 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
 291
 292                 /* Write out the listrecps while freeing from memory at the
 293                  * same time.  Am I clever or what?  :)
 294                  */
 295                 while (sc->listrecps != NULL) {
 296                     StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
 297                         nptr = sc->listrecps->next;
 298                         free(sc->listrecps);
 299                         sc->listrecps = nptr;
 300                 }
 301                 /* Do the same for digestrecps */
 302                 while (sc->digestrecps != NULL) {
 303                         StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
 304                         nptr = sc->digestrecps->next;
 305                         free(sc->digestrecps);
 306                         sc->digestrecps = nptr;
 307                 }
 308                 /* Do the same for participates */
 309                 while (sc->participates != NULL) {
 310                         StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
 311                         nptr = sc->participates->next;
 312                         free(sc->participates);
 313                         sc->participates = nptr;
 314                 }
 315                 while (sc->ignet_push_shares != NULL) {
 316                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
 317                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
 318                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
 319                         }
 320                         StrBufAppendPrintf(Cfg, "\n");
 321                         mptr = sc->ignet_push_shares->next;
 322                         free(sc->ignet_push_shares);
 323                         sc->ignet_push_shares = mptr;
 324                 }
 325                 if (sc->misc != NULL) {
 326                         StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
 327                 }
 328                 free(sc->misc);
 329
 330                 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
 331                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
 332                 {
 333                         close(TmpFD);
 334                         rename(tempfilename, filename);
 335                 }
 336                 else {
 337                         syslog(LOG_EMERG,
 338                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 339                                       tempfilename,
 340                                       strerror(errno));
 341                         close(TmpFD);
 342                         unlink(tempfilename);
 343                 }
 344                 FreeStrBuf(&Cfg);
 345                 free(sc);
 346                 *scc=NULL;
 347         }
 348         return 1;
 349 }
 350 int is_recipient(SpoolControl *sc, const char *Name)
 351 {
 352         namelist *nptr;
 353         size_t len;
 354
 355         len = strlen(Name);
 356         nptr = sc->listrecps;
 357         while (nptr != NULL) {
 358                 if (strncmp(Name, nptr->name, len)==0)
 359                         return 1;
 360                 nptr = nptr->next;
 361         }
 362         /* Do the same for digestrecps */
 363         nptr = sc->digestrecps;
 364         while (nptr != NULL) {
 365                 if (strncmp(Name, nptr->name, len)==0)
 366                         return 1;
 367                 nptr = nptr->next;
 368         }
 369         /* Do the same for participates */
 370         nptr = sc->participates;
 371         while (nptr != NULL) {
 372                 if (strncmp(Name, nptr->name, len)==0)
 373                         return 1;
 374                 nptr = nptr->next;
 375         }
 376         return 0;
 377 }
 378
 379
 380 /*
 381  * Batch up and send all outbound traffic from the current room
 382  */
 383 void network_spoolout_room(char *room_to_spool) {
 384         char buf[SIZ];
 385         char filename[PATH_MAX];
 386         SpoolControl *sc;
 387         int i;
 388
 389         /*
 390          * If the room doesn't exist, don't try to perform its networking tasks.
 391          * Normally this should never happen, but once in a while maybe a room gets
 392          * queued for networking and then deleted before it can happen.
 393          */
 394         if (CtdlGetRoom(&CC->room, room_to_spool) != 0) {
 395                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
 396                 return;
 397         }
 398
 399         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 400         begin_critical_section(S_NETCONFIGS);
 401
 402         /* Only do net processing for rooms that have netconfigs */
 403         if (!read_spoolcontrol_file(&sc, filename))
 404         {
 405                 end_critical_section(S_NETCONFIGS);
 406                 return;
 407         }
 408         syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
 409
 410         /* If there are digest recipients, we have to build a digest */
 411         if (sc->digestrecps != NULL) {
 412                 sc->digestfp = tmpfile();
 413                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
 414         }
 415
 416         /* Do something useful */
 417         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 418                 network_spool_msg, sc);
 419
 420         /* If we wrote a digest, deliver it and then close it */
 421         snprintf(buf, sizeof buf, "room_%s@%s",
 422                 CC->room.QRname, config.c_fqdn);
 423         for (i=0; buf[i]; ++i) {
 424                 buf[i] = tolower(buf[i]);
 425                 if (isspace(buf[i])) buf[i] = '_';
 426         }
 427         if (sc->digestfp != NULL) {
 428                 fprintf(sc->digestfp,   " -----------------------------------"
 429                                         "------------------------------------"
 430                                         "-------\n"
 431                                         "You are subscribed to the '%s' "
 432                                         "list.\n"
 433                                         "To post to the list: %s\n",
 434                                         CC->room.QRname, buf
 435                 );
 436                 network_deliver_digest(sc);     /* deliver and close */
 437         }
 438
 439         /* Now rewrite the config file */
 440         writenfree_spoolcontrol_file(&sc, filename);
 441         end_critical_section(S_NETCONFIGS);
 442 }
 443
 444 /*
 445  * Process a buffer containing a single message from a single file
 446  * from the inbound queue
 447  */
 448 void network_process_buffer(char *buffer, long size, char *working_ignetcfg, NetMap *the_netmap, int *netmap_changed)
 449 {
 450         struct CtdlMessage *msg = NULL;
 451         long pos;
 452         int field;
 453         struct recptypes *recp = NULL;
 454         char target_room[ROOMNAMELEN];
 455         struct ser_ret sermsg;
 456         char *oldpath = NULL;
 457         char filename[PATH_MAX];
 458         FILE *fp;
 459         char nexthop[SIZ];
 460         unsigned char firstbyte;
 461         unsigned char lastbyte;
 462
 463         syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 464
 465         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 466         firstbyte = buffer[0];
 467         lastbyte = buffer[size-1];
 468         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 469                 syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 470                         size, firstbyte, lastbyte);
 471                 return;
 472         }
 473
 474         /* Set default target room to trash */
 475         strcpy(target_room, TWITROOM);
 476
 477         /* Load the message into memory */
 478         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 479         memset(msg, 0, sizeof(struct CtdlMessage));
 480         msg->cm_magic = CTDLMESSAGE_MAGIC;
 481         msg->cm_anon_type = buffer[1];
 482         msg->cm_format_type = buffer[2];
 483
 484         for (pos = 3; pos < size; ++pos) {
 485                 field = buffer[pos];
 486                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
 487                 pos = pos + strlen(&buffer[(int)pos]);
 488         }
 489
 490         /* Check for message routing */
 491         if (msg->cm_fields['D'] != NULL) {
 492                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 493
 494                         /* route the message */
 495                         strcpy(nexthop, "");
 496                         if (is_valid_node(nexthop,
 497                                           NULL,
 498                                           msg->cm_fields['D'],
 499                                           working_ignetcfg,
 500                                           the_netmap) == 0)
 501                         {
 502                                 /* prepend our node to the path */
 503                                 if (msg->cm_fields['P'] != NULL) {
 504                                         oldpath = msg->cm_fields['P'];
 505                                         msg->cm_fields['P'] = NULL;
 506                                 }
 507                                 else {
 508                                         oldpath = strdup("unknown_user");
 509                                 }
 510                                 size = strlen(oldpath) + SIZ;
 511                                 msg->cm_fields['P'] = malloc(size);
 512                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
 513                                         config.c_nodename, oldpath);
 514                                 free(oldpath);
 515
 516                                 /* serialize the message */
 517                                 serialize_message(&sermsg, msg);
 518
 519                                 /* now send it */
 520                                 if (IsEmptyStr(nexthop)) {
 521                                         strcpy(nexthop, msg->cm_fields['D']);
 522                                 }
 523                                 snprintf(filename,
 524                                         sizeof filename,
 525                                         "%s/%s@%lx%x",
 526                                         ctdl_netout_dir,
 527                                         nexthop,
 528                                         time(NULL),
 529                                         rand()
 530                                 );
 531                                 syslog(LOG_DEBUG, "Appending to %s\n", filename);
 532                                 fp = fopen(filename, "ab");
 533                                 if (fp != NULL) {
 534                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 535                                         fclose(fp);
 536                                 }
 537                                 else {
 538                                         syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 539                                 }
 540                                 free(sermsg.ser);
 541                                 CtdlFreeMessage(msg);
 542                                 return;
 543                         }
 544
 545                         else {  /* invalid destination node name */
 546
 547                                 network_bounce(msg,
 548 "A message you sent could not be delivered due to an invalid destination node"
 549 " name.  Please check the address and try sending the message again.\n");
 550                                 msg = NULL;
 551                                 return;
 552
 553                         }
 554                 }
 555         }
 556
 557         /*
 558          * Check to see if we already have a copy of this message, and
 559          * abort its processing if so.  (We used to post a warning to Aide>
 560          * every time this happened, but the network is now so densely
 561          * connected that it's inevitable.)
 562          */
 563         if (network_usetable(msg) != 0) {
 564                 CtdlFreeMessage(msg);
 565                 return;
 566         }
 567
 568         /* Learn network topology from the path */
 569         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
 570                 network_learn_topology(msg->cm_fields['N'],
 571                                        msg->cm_fields['P'],
 572                                        the_netmap,
 573                                        netmap_changed);
 574         }
 575
 576         /* Is the sending node giving us a very persuasive suggestion about
 577          * which room this message should be saved in?  If so, go with that.
 578          */
 579         if (msg->cm_fields['C'] != NULL) {
 580                 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
 581         }
 582
 583         /* Otherwise, does it have a recipient?  If so, validate it... */
 584         else if (msg->cm_fields['R'] != NULL) {
 585                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
 586                 if (recp != NULL) if (recp->num_error != 0) {
 587                         network_bounce(msg,
 588                                 "A message you sent could not be delivered due to an invalid address.\n"
 589                                 "Please check the address and try sending the message again.\n");
 590                         msg = NULL;
 591                         free_recipients(recp);
 592                         syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 593                         return;
 594                 }
 595                 strcpy(target_room, "");        /* no target room if mail */
 596         }
 597
 598         /* Our last shot at finding a home for this message is to see if
 599          * it has the O field (Originating room) set.
 600          */
 601         else if (msg->cm_fields['O'] != NULL) {
 602                 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
 603         }
 604
 605         /* Strip out fields that are only relevant during transit */
 606         if (msg->cm_fields['D'] != NULL) {
 607                 free(msg->cm_fields['D']);
 608                 msg->cm_fields['D'] = NULL;
 609         }
 610         if (msg->cm_fields['C'] != NULL) {
 611                 free(msg->cm_fields['C']);
 612                 msg->cm_fields['C'] = NULL;
 613         }
 614
 615         /* save the message into a room */
 616         if (PerformNetprocHooks(msg, target_room) == 0) {
 617                 msg->cm_flags = CM_SKIP_HOOKS;
 618                 CtdlSubmitMsg(msg, recp, target_room, 0);
 619         }
 620         CtdlFreeMessage(msg);
 621         free_recipients(recp);
 622 }
 623
 624
 625 /*
 626  * Process a single message from a single file from the inbound queue
 627  */
 628 void network_process_message(FILE *fp,
 629                              long msgstart,
 630                              long msgend,
 631                              char *working_ignetcfg,
 632                              NetMap *the_netmap,
 633                              int *netmap_changed)
 634 {
 635         long hold_pos;
 636         long size;
 637         char *buffer;
 638
 639         hold_pos = ftell(fp);
 640         size = msgend - msgstart + 1;
 641         buffer = malloc(size);
 642         if (buffer != NULL) {
 643                 fseek(fp, msgstart, SEEK_SET);
 644                 if (fread(buffer, size, 1, fp) > 0) {
 645                         network_process_buffer(buffer,
 646                                                size,
 647                                                working_ignetcfg,
 648                                                the_netmap,
 649                                                netmap_changed);
 650                 }
 651                 free(buffer);
 652         }
 653
 654         fseek(fp, hold_pos, SEEK_SET);
 655 }
 656
 657
 658 /*
 659  * Process a single file from the inbound queue
 660  */
 661 void network_process_file(char *filename,
 662                           char *working_ignetcfg,
 663                           NetMap *the_netmap,
 664                           int *netmap_changed)
 665 {
 666         FILE *fp;
 667         long msgstart = (-1L);
 668         long msgend = (-1L);
 669         long msgcur = 0L;
 670         int ch;
 671
 672
 673         fp = fopen(filename, "rb");
 674         if (fp == NULL) {
 675                 syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 676                 return;
 677         }
 678
 679         fseek(fp, 0L, SEEK_END);
 680         syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 681         rewind(fp);
 682
 683         /* Look for messages in the data stream and break them out */
 684         while (ch = getc(fp), ch >= 0) {
 685
 686                 if (ch == 255) {
 687                         if (msgstart >= 0L) {
 688                                 msgend = msgcur - 1;
 689                                 network_process_message(fp,
 690                                                         msgstart,
 691                                                         msgend,
 692                                                         working_ignetcfg,
 693                                                         the_netmap,
 694                                                         netmap_changed);
 695                         }
 696                         msgstart = msgcur;
 697                 }
 698
 699                 ++msgcur;
 700         }
 701
 702         msgend = msgcur - 1;
 703         if (msgstart >= 0L) {
 704                 network_process_message(fp,
 705                                         msgstart,
 706                                         msgend,
 707                                         working_ignetcfg,
 708                                         the_netmap,
 709                                         netmap_changed);
 710         }
 711
 712         fclose(fp);
 713         unlink(filename);
 714 }
 715
 716
 717 /*
 718  * Process anything in the inbound queue
 719  */
 720 void network_do_spoolin(char *working_ignetcfg, NetMap *the_netmap, int *netmap_changed)
 721 {
 722         DIR *dp;
 723         struct dirent *d;
 724         struct stat statbuf;
 725         char filename[PATH_MAX];
 726         static time_t last_spoolin_mtime = 0L;
 727
 728         /*
 729          * Check the spoolin directory's modification time.  If it hasn't
 730          * been touched, we don't need to scan it.
 731          */
 732         if (stat(ctdl_netin_dir, &statbuf)) return;
 733         if (statbuf.st_mtime == last_spoolin_mtime) {
 734                 syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 735                 return;
 736         }
 737         last_spoolin_mtime = statbuf.st_mtime;
 738         syslog(LOG_DEBUG, "network: processing inbound queue\n");
 739
 740         /*
 741          * Ok, there's something interesting in there, so scan it.
 742          */
 743         dp = opendir(ctdl_netin_dir);
 744         if (dp == NULL) return;
 745
 746         while (d = readdir(dp), d != NULL) {
 747                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
 748                         snprintf(filename,
 749                                 sizeof filename,
 750                                 "%s/%s",
 751                                 ctdl_netin_dir,
 752                                 d->d_name
 753                         );
 754                         network_process_file(filename,
 755                                              working_ignetcfg,
 756                                              the_netmap,
 757                                              netmap_changed);
 758                 }
 759         }
 760
 761         closedir(dp);
 762 }
 763
 764 /*
 765  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 766  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 767  */
 768 void network_consolidate_spoolout(char *working_ignetcfg, NetMap *the_netmap)
 769 {
 770         DIR *dp;
 771         struct dirent *d;
 772         char filename[PATH_MAX];
 773         char cmd[PATH_MAX];
 774         char nexthop[256];
 775         int i;
 776         char *ptr;
 777
 778         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 779         dp = opendir(ctdl_netout_dir);
 780         if (dp == NULL) return;
 781         while (d = readdir(dp), d != NULL) {
 782                 if (
 783                         (strcmp(d->d_name, "."))
 784                         && (strcmp(d->d_name, ".."))
 785                         && (strchr(d->d_name, '@') != NULL)
 786                 ) {
 787                         safestrncpy(nexthop, d->d_name, sizeof nexthop);
 788                         ptr = strchr(nexthop, '@');
 789                         if (ptr) *ptr = 0;
 790
 791                         snprintf(filename,
 792                                 sizeof filename,
 793                                 "%s/%s",
 794                                 ctdl_netout_dir,
 795                                 d->d_name
 796                         );
 797
 798                         syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
 799                         if (network_talking_to(nexthop, NTT_CHECK)) {
 800                                 syslog(LOG_DEBUG,
 801                                         "Currently online with %s - skipping for now\n",
 802                                         nexthop
 803                                 );
 804                         }
 805                         else {
 806                                 network_talking_to(nexthop, NTT_ADD);
 807                                 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
 808                                         filename,
 809                                         ctdl_netout_dir, nexthop,
 810                                         filename
 811                                 );
 812                                 system(cmd);
 813                                 network_talking_to(nexthop, NTT_REMOVE);
 814                         }
 815                 }
 816         }
 817         closedir(dp);
 818
 819         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
 820
 821         dp = opendir(ctdl_netout_dir);
 822         if (dp == NULL) return;
 823
 824         while (d = readdir(dp), d != NULL) {
 825                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
 826                         continue;
 827                 ptr = strchr(d->d_name, '@');
 828                 if (d != NULL)
 829                         continue;
 830                 snprintf(filename,
 831                         sizeof filename,
 832                         "%s/%s",
 833                         ctdl_netout_dir,
 834                         d->d_name
 835                 );
 836
 837                 strcpy(nexthop, "");
 838                 i = is_valid_node(nexthop,
 839                                   NULL,
 840                                   d->d_name,
 841                                   working_ignetcfg,
 842                                   the_netmap);
 843
 844                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
 845                         unlink(filename);
 846                 }
 847         }
 848
 849
 850         closedir(dp);
 851 }
 852
 853
 854
 855
 856 /*
 857  * It's ok if these directories already exist.  Just fail silently.
 858  */
 859 void create_spool_dirs(void) {
 860         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
 861                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
 862         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
 863                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
 864         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
 865                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
 866         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
 867                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
 868         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
 869                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 870         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
 871                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 872         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
 873                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
 874         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
 875                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
 876 }
 877
 878 /*
 879  * Module entry point
 880  */
 881 CTDL_MODULE_INIT(network_spool)
 882 {
 883         if (!threading)
 884         {
 885                 create_spool_dirs();
 886                 CtdlRegisterCleanupHook(destroy_network_queue_room);
 887         }
 888         return "network_spool";
 889 }