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 static void network_learn_topology(char *node, char *path, NetMap **the_netmap, int *netmap_changed)
  99 {
 100         char nexthop[256];
 101         NetMap *nmptr;
 102
 103         *nexthop = '\0';
 104
 105         if (num_tokens(path, '!') < 3) return;
 106         for (nmptr = *the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 107                 if (!strcasecmp(nmptr->nodename, node)) {
 108                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
 109                         nmptr->lastcontact = time(NULL);
 110                         (*netmap_changed) ++;
 111                         return;
 112                 }
 113         }
 114
 115         /* If we got here then it's not in the map, so add it. */
 116         nmptr = (NetMap *) malloc(sizeof (NetMap));
 117         strcpy(nmptr->nodename, node);
 118         nmptr->lastcontact = time(NULL);
 119         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
 120         nmptr->next = *the_netmap;
 121         *the_netmap = nmptr;
 122         (*netmap_changed) ++;
 123 }
 124
 125
 126
 127
 128 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 129 {
 130         FILE *fp;
 131         char instr[SIZ];
 132         char buf[SIZ];
 133         char nodename[256];
 134         char roomname[ROOMNAMELEN];
 135         size_t miscsize = 0;
 136         size_t linesize = 0;
 137         int skipthisline = 0;
 138         namelist *nptr = NULL;
 139         maplist *mptr = NULL;
 140         SpoolControl *sc;
 141
 142         fp = fopen(filename, "r");
 143         if (fp == NULL) {
 144                 return 0;
 145         }
 146         sc = malloc(sizeof(SpoolControl));
 147         memset(sc, 0, sizeof(SpoolControl));
 148         *scc = sc;
 149
 150         while (fgets(buf, sizeof buf, fp) != NULL) {
 151                 buf[strlen(buf)-1] = 0;
 152
 153                 extract_token(instr, buf, 0, '|', sizeof instr);
 154                 if (!strcasecmp(instr, strof(lastsent))) {
 155                         sc->lastsent = extract_long(buf, 1);
 156                 }
 157                 else if (!strcasecmp(instr, strof(listrecp))) {
 158                         nptr = (namelist *)
 159                                 malloc(sizeof(namelist));
 160                         nptr->next = sc->listrecps;
 161                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 162                         sc->listrecps = nptr;
 163                 }
 164                 else if (!strcasecmp(instr, strof(participate))) {
 165                         nptr = (namelist *)
 166                                 malloc(sizeof(namelist));
 167                         nptr->next = sc->participates;
 168                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 169                         sc->participates = nptr;
 170                 }
 171                 else if (!strcasecmp(instr, strof(digestrecp))) {
 172                         nptr = (namelist *)
 173                                 malloc(sizeof(namelist));
 174                         nptr->next = sc->digestrecps;
 175                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 176                         sc->digestrecps = nptr;
 177                 }
 178                 else if (!strcasecmp(instr, strof(ignet_push_share))) {
 179                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 180                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 181                         mptr = (maplist *) malloc(sizeof(maplist));
 182                         mptr->next = sc->ignet_push_shares;
 183                         strcpy(mptr->remote_nodename, nodename);
 184                         strcpy(mptr->remote_roomname, roomname);
 185                         sc->ignet_push_shares = mptr;
 186                 }
 187                 else {
 188                         /* Preserve 'other' lines ... *unless* they happen to
 189                          * be subscribe/unsubscribe pendings with expired
 190                          * timestamps.
 191                          */
 192                         skipthisline = 0;
 193                         if (!strncasecmp(buf, strof(subpending)"|", 11)) {
 194                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 195                                         skipthisline = 1;
 196                                 }
 197                         }
 198                         if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
 199                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 200                                         skipthisline = 1;
 201                                 }
 202                         }
 203
 204                         if (skipthisline == 0) {
 205                                 linesize = strlen(buf);
 206                                 sc->misc = realloc(sc->misc,
 207                                         (miscsize + linesize + 2) );
 208                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 209                                 miscsize = miscsize + linesize + 1;
 210                         }
 211                 }
 212
 213
 214         }
 215         fclose(fp);
 216         return 1;
 217 }
 218
 219 void free_spoolcontrol_struct(SpoolControl **scc)
 220 {
 221         SpoolControl *sc;
 222         namelist *nptr = NULL;
 223         maplist *mptr = NULL;
 224
 225         sc = *scc;
 226         while (sc->listrecps != NULL) {
 227                 nptr = sc->listrecps->next;
 228                 free(sc->listrecps);
 229                 sc->listrecps = nptr;
 230         }
 231         /* Do the same for digestrecps */
 232         while (sc->digestrecps != NULL) {
 233                 nptr = sc->digestrecps->next;
 234                 free(sc->digestrecps);
 235                 sc->digestrecps = nptr;
 236         }
 237         /* Do the same for participates */
 238         while (sc->participates != NULL) {
 239                 nptr = sc->participates->next;
 240                 free(sc->participates);
 241                 sc->participates = nptr;
 242         }
 243         while (sc->ignet_push_shares != NULL) {
 244                 mptr = sc->ignet_push_shares->next;
 245                 free(sc->ignet_push_shares);
 246                 sc->ignet_push_shares = mptr;
 247         }
 248         free(sc->misc);
 249         free(sc);
 250         *scc=NULL;
 251 }
 252
 253 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 254 {
 255         char tempfilename[PATH_MAX];
 256         int TmpFD;
 257         SpoolControl *sc;
 258         namelist *nptr = NULL;
 259         maplist *mptr = NULL;
 260         long len;
 261         time_t unixtime;
 262         struct timeval tv;
 263         long reltid; /* if we don't have SYS_gettid, use "random" value */
 264         StrBuf *Cfg;
 265         int rc;
 266
 267         len = strlen(filename);
 268         memcpy(tempfilename, filename, len + 1);
 269
 270
 271 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 272         reltid = syscall(SYS_gettid);
 273 #endif
 274         gettimeofday(&tv, NULL);
 275         /* Promote to time_t; types differ on some OSes (like darwin) */
 276         unixtime = tv.tv_sec;
 277
 278         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 279         sc = *scc;
 280         errno = 0;
 281         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 282         Cfg = NewStrBuf();
 283         if ((TmpFD < 0) || (errno != 0)) {
 284                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 285                         filename, strerror(errno));
 286                 free_spoolcontrol_struct(scc);
 287                 unlink(tempfilename);
 288         }
 289         else {
 290                 fchown(TmpFD, config.c_ctdluid, 0);
 291                 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
 292
 293                 /* Write out the listrecps while freeing from memory at the
 294                  * same time.  Am I clever or what?  :)
 295                  */
 296                 while (sc->listrecps != NULL) {
 297                     StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
 298                         nptr = sc->listrecps->next;
 299                         free(sc->listrecps);
 300                         sc->listrecps = nptr;
 301                 }
 302                 /* Do the same for digestrecps */
 303                 while (sc->digestrecps != NULL) {
 304                         StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
 305                         nptr = sc->digestrecps->next;
 306                         free(sc->digestrecps);
 307                         sc->digestrecps = nptr;
 308                 }
 309                 /* Do the same for participates */
 310                 while (sc->participates != NULL) {
 311                         StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
 312                         nptr = sc->participates->next;
 313                         free(sc->participates);
 314                         sc->participates = nptr;
 315                 }
 316                 while (sc->ignet_push_shares != NULL) {
 317                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
 318                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
 319                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
 320                         }
 321                         StrBufAppendPrintf(Cfg, "\n");
 322                         mptr = sc->ignet_push_shares->next;
 323                         free(sc->ignet_push_shares);
 324                         sc->ignet_push_shares = mptr;
 325                 }
 326                 if (sc->misc != NULL) {
 327                         StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
 328                 }
 329                 free(sc->misc);
 330
 331                 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
 332                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
 333                 {
 334                         close(TmpFD);
 335                         rename(tempfilename, filename);
 336                 }
 337                 else {
 338                         syslog(LOG_EMERG,
 339                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 340                                       tempfilename,
 341                                       strerror(errno));
 342                         close(TmpFD);
 343                         unlink(tempfilename);
 344                 }
 345                 FreeStrBuf(&Cfg);
 346                 free(sc);
 347                 *scc=NULL;
 348         }
 349         return 1;
 350 }
 351 int is_recipient(SpoolControl *sc, const char *Name)
 352 {
 353         namelist *nptr;
 354         size_t len;
 355
 356         len = strlen(Name);
 357         nptr = sc->listrecps;
 358         while (nptr != NULL) {
 359                 if (strncmp(Name, nptr->name, len)==0)
 360                         return 1;
 361                 nptr = nptr->next;
 362         }
 363         /* Do the same for digestrecps */
 364         nptr = sc->digestrecps;
 365         while (nptr != NULL) {
 366                 if (strncmp(Name, nptr->name, len)==0)
 367                         return 1;
 368                 nptr = nptr->next;
 369         }
 370         /* Do the same for participates */
 371         nptr = sc->participates;
 372         while (nptr != NULL) {
 373                 if (strncmp(Name, nptr->name, len)==0)
 374                         return 1;
 375                 nptr = nptr->next;
 376         }
 377         return 0;
 378 }
 379
 380
 381 /*
 382  * Batch up and send all outbound traffic from the current room
 383  */
 384 void network_spoolout_room(RoomProcList *room_to_spool,
 385                            char *working_ignetcfg,
 386                            NetMap *the_netmap)
 387 {
 388         char buf[SIZ];
 389         char filename[PATH_MAX];
 390         SpoolControl *sc;
 391         int i;
 392
 393         /*
 394          * If the room doesn't exist, don't try to perform its networking tasks.
 395          * Normally this should never happen, but once in a while maybe a room gets
 396          * queued for networking and then deleted before it can happen.
 397          */
 398         if (CtdlGetRoom(&CC->room, room_to_spool->name) != 0) {
 399                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 400                 return;
 401         }
 402
 403         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 404         begin_critical_section(S_NETCONFIGS);
 405
 406         /* Only do net processing for rooms that have netconfigs */
 407         if (!read_spoolcontrol_file(&sc, filename))
 408         {
 409                 end_critical_section(S_NETCONFIGS);
 410                 return;
 411         }
 412         syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
 413
 414         sc->working_ignetcfg = working_ignetcfg;
 415         sc->the_netmap = the_netmap;
 416
 417         /* If there are digest recipients, we have to build a digest */
 418         if (sc->digestrecps != NULL) {
 419                 sc->digestfp = tmpfile();
 420                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
 421         }
 422
 423         /* Do something useful */
 424         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 425                 network_spool_msg, sc);
 426
 427         /* If we wrote a digest, deliver it and then close it */
 428         snprintf(buf, sizeof buf, "room_%s@%s",
 429                 CC->room.QRname, config.c_fqdn);
 430         for (i=0; buf[i]; ++i) {
 431                 buf[i] = tolower(buf[i]);
 432                 if (isspace(buf[i])) buf[i] = '_';
 433         }
 434         if (sc->digestfp != NULL) {
 435                 fprintf(sc->digestfp,   " -----------------------------------"
 436                                         "------------------------------------"
 437                                         "-------\n"
 438                                         "You are subscribed to the '%s' "
 439                                         "list.\n"
 440                                         "To post to the list: %s\n",
 441                                         CC->room.QRname, buf
 442                 );
 443                 network_deliver_digest(sc);     /* deliver and close */
 444         }
 445
 446         /* Now rewrite the config file */
 447         writenfree_spoolcontrol_file(&sc, filename);
 448         end_critical_section(S_NETCONFIGS);
 449 }
 450
 451 /*
 452  * Process a buffer containing a single message from a single file
 453  * from the inbound queue
 454  */
 455 void network_process_buffer(char *buffer, long size, char *working_ignetcfg, NetMap **the_netmap, int *netmap_changed)
 456 {
 457         struct CtdlMessage *msg = NULL;
 458         long pos;
 459         int field;
 460         struct recptypes *recp = NULL;
 461         char target_room[ROOMNAMELEN];
 462         struct ser_ret sermsg;
 463         char *oldpath = NULL;
 464         char filename[PATH_MAX];
 465         FILE *fp;
 466         char nexthop[SIZ];
 467         unsigned char firstbyte;
 468         unsigned char lastbyte;
 469
 470         syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 471
 472         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 473         firstbyte = buffer[0];
 474         lastbyte = buffer[size-1];
 475         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 476                 syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 477                         size, firstbyte, lastbyte);
 478                 return;
 479         }
 480
 481         /* Set default target room to trash */
 482         strcpy(target_room, TWITROOM);
 483
 484         /* Load the message into memory */
 485         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 486         memset(msg, 0, sizeof(struct CtdlMessage));
 487         msg->cm_magic = CTDLMESSAGE_MAGIC;
 488         msg->cm_anon_type = buffer[1];
 489         msg->cm_format_type = buffer[2];
 490
 491         for (pos = 3; pos < size; ++pos) {
 492                 field = buffer[pos];
 493                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
 494                 pos = pos + strlen(&buffer[(int)pos]);
 495         }
 496
 497         /* Check for message routing */
 498         if (msg->cm_fields['D'] != NULL) {
 499                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 500
 501                         /* route the message */
 502                         strcpy(nexthop, "");
 503                         if (is_valid_node(nexthop,
 504                                           NULL,
 505                                           msg->cm_fields['D'],
 506                                           working_ignetcfg,
 507                                           *the_netmap) == 0)
 508                         {
 509                                 /* prepend our node to the path */
 510                                 if (msg->cm_fields['P'] != NULL) {
 511                                         oldpath = msg->cm_fields['P'];
 512                                         msg->cm_fields['P'] = NULL;
 513                                 }
 514                                 else {
 515                                         oldpath = strdup("unknown_user");
 516                                 }
 517                                 size = strlen(oldpath) + SIZ;
 518                                 msg->cm_fields['P'] = malloc(size);
 519                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
 520                                         config.c_nodename, oldpath);
 521                                 free(oldpath);
 522
 523                                 /* serialize the message */
 524                                 serialize_message(&sermsg, msg);
 525
 526                                 /* now send it */
 527                                 if (IsEmptyStr(nexthop)) {
 528                                         strcpy(nexthop, msg->cm_fields['D']);
 529                                 }
 530                                 snprintf(filename,
 531                                         sizeof filename,
 532                                         "%s/%s@%lx%x",
 533                                         ctdl_netout_dir,
 534                                         nexthop,
 535                                         time(NULL),
 536                                         rand()
 537                                 );
 538                                 syslog(LOG_DEBUG, "Appending to %s\n", filename);
 539                                 fp = fopen(filename, "ab");
 540                                 if (fp != NULL) {
 541                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 542                                         fclose(fp);
 543                                 }
 544                                 else {
 545                                         syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 546                                 }
 547                                 free(sermsg.ser);
 548                                 CtdlFreeMessage(msg);
 549                                 return;
 550                         }
 551
 552                         else {  /* invalid destination node name */
 553
 554                                 network_bounce(msg,
 555 "A message you sent could not be delivered due to an invalid destination node"
 556 " name.  Please check the address and try sending the message again.\n");
 557                                 msg = NULL;
 558                                 return;
 559
 560                         }
 561                 }
 562         }
 563
 564         /*
 565          * Check to see if we already have a copy of this message, and
 566          * abort its processing if so.  (We used to post a warning to Aide>
 567          * every time this happened, but the network is now so densely
 568          * connected that it's inevitable.)
 569          */
 570         if (network_usetable(msg) != 0) {
 571                 CtdlFreeMessage(msg);
 572                 return;
 573         }
 574
 575         /* Learn network topology from the path */
 576         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
 577                 network_learn_topology(msg->cm_fields['N'],
 578                                        msg->cm_fields['P'],
 579                                        the_netmap,
 580                                        netmap_changed);
 581         }
 582
 583         /* Is the sending node giving us a very persuasive suggestion about
 584          * which room this message should be saved in?  If so, go with that.
 585          */
 586         if (msg->cm_fields['C'] != NULL) {
 587                 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
 588         }
 589
 590         /* Otherwise, does it have a recipient?  If so, validate it... */
 591         else if (msg->cm_fields['R'] != NULL) {
 592                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
 593                 if (recp != NULL) if (recp->num_error != 0) {
 594                         network_bounce(msg,
 595                                 "A message you sent could not be delivered due to an invalid address.\n"
 596                                 "Please check the address and try sending the message again.\n");
 597                         msg = NULL;
 598                         free_recipients(recp);
 599                         syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 600                         return;
 601                 }
 602                 strcpy(target_room, "");        /* no target room if mail */
 603         }
 604
 605         /* Our last shot at finding a home for this message is to see if
 606          * it has the O field (Originating room) set.
 607          */
 608         else if (msg->cm_fields['O'] != NULL) {
 609                 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
 610         }
 611
 612         /* Strip out fields that are only relevant during transit */
 613         if (msg->cm_fields['D'] != NULL) {
 614                 free(msg->cm_fields['D']);
 615                 msg->cm_fields['D'] = NULL;
 616         }
 617         if (msg->cm_fields['C'] != NULL) {
 618                 free(msg->cm_fields['C']);
 619                 msg->cm_fields['C'] = NULL;
 620         }
 621
 622         /* save the message into a room */
 623         if (PerformNetprocHooks(msg, target_room) == 0) {
 624                 msg->cm_flags = CM_SKIP_HOOKS;
 625                 CtdlSubmitMsg(msg, recp, target_room, 0);
 626         }
 627         CtdlFreeMessage(msg);
 628         free_recipients(recp);
 629 }
 630
 631
 632 /*
 633  * Process a single message from a single file from the inbound queue
 634  */
 635 void network_process_message(FILE *fp,
 636                              long msgstart,
 637                              long msgend,
 638                              char *working_ignetcfg,
 639                              NetMap **the_netmap,
 640                              int *netmap_changed)
 641 {
 642         long hold_pos;
 643         long size;
 644         char *buffer;
 645
 646         hold_pos = ftell(fp);
 647         size = msgend - msgstart + 1;
 648         buffer = malloc(size);
 649         if (buffer != NULL) {
 650                 fseek(fp, msgstart, SEEK_SET);
 651                 if (fread(buffer, size, 1, fp) > 0) {
 652                         network_process_buffer(buffer,
 653                                                size,
 654                                                working_ignetcfg,
 655                                                the_netmap,
 656                                                netmap_changed);
 657                 }
 658                 free(buffer);
 659         }
 660
 661         fseek(fp, hold_pos, SEEK_SET);
 662 }
 663
 664
 665 /*
 666  * Process a single file from the inbound queue
 667  */
 668 void network_process_file(char *filename,
 669                           char *working_ignetcfg,
 670                           NetMap **the_netmap,
 671                           int *netmap_changed)
 672 {
 673         FILE *fp;
 674         long msgstart = (-1L);
 675         long msgend = (-1L);
 676         long msgcur = 0L;
 677         int ch;
 678
 679
 680         fp = fopen(filename, "rb");
 681         if (fp == NULL) {
 682                 syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 683                 return;
 684         }
 685
 686         fseek(fp, 0L, SEEK_END);
 687         syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 688         rewind(fp);
 689
 690         /* Look for messages in the data stream and break them out */
 691         while (ch = getc(fp), ch >= 0) {
 692
 693                 if (ch == 255) {
 694                         if (msgstart >= 0L) {
 695                                 msgend = msgcur - 1;
 696                                 network_process_message(fp,
 697                                                         msgstart,
 698                                                         msgend,
 699                                                         working_ignetcfg,
 700                                                         the_netmap,
 701                                                         netmap_changed);
 702                         }
 703                         msgstart = msgcur;
 704                 }
 705
 706                 ++msgcur;
 707         }
 708
 709         msgend = msgcur - 1;
 710         if (msgstart >= 0L) {
 711                 network_process_message(fp,
 712                                         msgstart,
 713                                         msgend,
 714                                         working_ignetcfg,
 715                                         the_netmap,
 716                                         netmap_changed);
 717         }
 718
 719         fclose(fp);
 720         unlink(filename);
 721 }
 722
 723
 724 /*
 725  * Process anything in the inbound queue
 726  */
 727 void network_do_spoolin(char *working_ignetcfg, NetMap **the_netmap, int *netmap_changed)
 728 {
 729         DIR *dp;
 730         struct dirent *d;
 731         struct stat statbuf;
 732         char filename[PATH_MAX];
 733         static time_t last_spoolin_mtime = 0L;
 734
 735         /*
 736          * Check the spoolin directory's modification time.  If it hasn't
 737          * been touched, we don't need to scan it.
 738          */
 739         if (stat(ctdl_netin_dir, &statbuf)) return;
 740         if (statbuf.st_mtime == last_spoolin_mtime) {
 741                 syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 742                 return;
 743         }
 744         last_spoolin_mtime = statbuf.st_mtime;
 745         syslog(LOG_DEBUG, "network: processing inbound queue\n");
 746
 747         /*
 748          * Ok, there's something interesting in there, so scan it.
 749          */
 750         dp = opendir(ctdl_netin_dir);
 751         if (dp == NULL) return;
 752
 753         while (d = readdir(dp), d != NULL) {
 754                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
 755                         snprintf(filename,
 756                                 sizeof filename,
 757                                 "%s/%s",
 758                                 ctdl_netin_dir,
 759                                 d->d_name
 760                         );
 761                         network_process_file(filename,
 762                                              working_ignetcfg,
 763                                              the_netmap,
 764                                              netmap_changed);
 765                 }
 766         }
 767
 768         closedir(dp);
 769 }
 770
 771 /*
 772  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 773  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 774  */
 775 void network_consolidate_spoolout(char *working_ignetcfg, NetMap *the_netmap)
 776 {
 777         DIR *dp;
 778         struct dirent *d;
 779         char filename[PATH_MAX];
 780         char cmd[PATH_MAX];
 781         char nexthop[256];
 782         long nexthoplen;
 783         int i;
 784         char *ptr;
 785
 786         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 787         dp = opendir(ctdl_netout_dir);
 788         if (dp == NULL) return;
 789         while (d = readdir(dp), d != NULL) {
 790                 if (
 791                         (strcmp(d->d_name, "."))
 792                         && (strcmp(d->d_name, ".."))
 793                         && (strchr(d->d_name, '@') != NULL)
 794                 ) {
 795                         nexthoplen = safestrncpy(nexthop, d->d_name, sizeof nexthop);
 796                         ptr = strchr(nexthop, '@');
 797                         if (ptr) {
 798                                 *ptr = 0;
 799                                 nexthoplen = ptr - nexthop;
 800                         }
 801
 802                         snprintf(filename,
 803                                 sizeof filename,
 804                                 "%s/%s",
 805                                 ctdl_netout_dir,
 806                                 d->d_name
 807                         );
 808
 809                         syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
 810                         if (network_talking_to(nexthop, nexthoplen, NTT_CHECK)) {
 811                                 syslog(LOG_DEBUG,
 812                                         "Currently online with %s - skipping for now\n",
 813                                         nexthop
 814                                 );
 815                         }
 816                         else {
 817                                 network_talking_to(nexthop, nexthoplen, NTT_ADD);
 818                                 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
 819                                         filename,
 820                                         ctdl_netout_dir, nexthop,
 821                                         filename
 822                                 );
 823                                 system(cmd);
 824                                 network_talking_to(nexthop, nexthoplen, NTT_REMOVE);
 825                         }
 826                 }
 827         }
 828         closedir(dp);
 829
 830         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
 831
 832         dp = opendir(ctdl_netout_dir);
 833         if (dp == NULL) return;
 834
 835         while (d = readdir(dp), d != NULL) {
 836                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
 837                         continue;
 838
 839                 snprintf(filename,
 840                         sizeof filename,
 841                         "%s/%s",
 842                         ctdl_netout_dir,
 843                         d->d_name
 844                 );
 845
 846                 strcpy(nexthop, "");
 847                 i = is_valid_node(nexthop,
 848                                   NULL,
 849                                   d->d_name,
 850                                   working_ignetcfg,
 851                                   the_netmap);
 852
 853                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
 854                         unlink(filename);
 855                 }
 856         }
 857
 858
 859         closedir(dp);
 860 }
 861
 862
 863
 864
 865 /*
 866  * It's ok if these directories already exist.  Just fail silently.
 867  */
 868 void create_spool_dirs(void) {
 869         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
 870                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
 871         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
 872                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
 873         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
 874                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
 875         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
 876                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
 877         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
 878                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 879         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
 880                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 881         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
 882                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
 883         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
 884                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
 885 }
 886
 887 /*
 888  * Module entry point
 889  */
 890 CTDL_MODULE_INIT(network_spool)
 891 {
 892         if (!threading)
 893         {
 894                 create_spool_dirs();
 895 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
 896         }
 897         return "network_spool";
 898 }