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) 2000-2012 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
  97
  98 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
  99 {
 100         FILE *fp;
 101         char instr[SIZ];
 102         char buf[SIZ];
 103         char nodename[256];
 104         char roomname[ROOMNAMELEN];
 105         size_t miscsize = 0;
 106         size_t linesize = 0;
 107         int skipthisline = 0;
 108         namelist *nptr = NULL;
 109         maplist *mptr = NULL;
 110         SpoolControl *sc;
 111
 112         fp = fopen(filename, "r");
 113         if (fp == NULL) {
 114                 return 0;
 115         }
 116         sc = malloc(sizeof(SpoolControl));
 117         memset(sc, 0, sizeof(SpoolControl));
 118         *scc = sc;
 119
 120         while (fgets(buf, sizeof buf, fp) != NULL) {
 121                 buf[strlen(buf)-1] = 0;
 122
 123                 extract_token(instr, buf, 0, '|', sizeof instr);
 124                 if (!strcasecmp(instr, strof(lastsent))) {
 125                         sc->lastsent = extract_long(buf, 1);
 126                 }
 127                 else if (!strcasecmp(instr, strof(listrecp))) {
 128                         nptr = (namelist *)
 129                                 malloc(sizeof(namelist));
 130                         nptr->next = sc->listrecps;
 131                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 132                         sc->listrecps = nptr;
 133                 }
 134                 else if (!strcasecmp(instr, strof(participate))) {
 135                         nptr = (namelist *)
 136                                 malloc(sizeof(namelist));
 137                         nptr->next = sc->participates;
 138                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 139                         sc->participates = nptr;
 140                 }
 141                 else if (!strcasecmp(instr, strof(digestrecp))) {
 142                         nptr = (namelist *)
 143                                 malloc(sizeof(namelist));
 144                         nptr->next = sc->digestrecps;
 145                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 146                         sc->digestrecps = nptr;
 147                 }
 148                 else if (!strcasecmp(instr, strof(ignet_push_share))) {
 149                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 150                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 151                         mptr = (maplist *) malloc(sizeof(maplist));
 152                         mptr->next = sc->ignet_push_shares;
 153                         strcpy(mptr->remote_nodename, nodename);
 154                         strcpy(mptr->remote_roomname, roomname);
 155                         sc->ignet_push_shares = mptr;
 156                 }
 157                 else {
 158                         /* Preserve 'other' lines ... *unless* they happen to
 159                          * be subscribe/unsubscribe pendings with expired
 160                          * timestamps.
 161                          */
 162                         skipthisline = 0;
 163                         if (!strncasecmp(buf, strof(subpending)"|", 11)) {
 164                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 165                                         skipthisline = 1;
 166                                 }
 167                         }
 168                         if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
 169                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 170                                         skipthisline = 1;
 171                                 }
 172                         }
 173
 174                         if (skipthisline == 0) {
 175                                 linesize = strlen(buf);
 176                                 sc->misc = realloc(sc->misc,
 177                                         (miscsize + linesize + 2) );
 178                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 179                                 miscsize = miscsize + linesize + 1;
 180                         }
 181                 }
 182
 183
 184         }
 185         fclose(fp);
 186         return 1;
 187 }
 188
 189 void free_spoolcontrol_struct(SpoolControl **scc)
 190 {
 191         SpoolControl *sc;
 192         namelist *nptr = NULL;
 193         maplist *mptr = NULL;
 194
 195         sc = *scc;
 196         while (sc->listrecps != NULL) {
 197                 nptr = sc->listrecps->next;
 198                 free(sc->listrecps);
 199                 sc->listrecps = nptr;
 200         }
 201         /* Do the same for digestrecps */
 202         while (sc->digestrecps != NULL) {
 203                 nptr = sc->digestrecps->next;
 204                 free(sc->digestrecps);
 205                 sc->digestrecps = nptr;
 206         }
 207         /* Do the same for participates */
 208         while (sc->participates != NULL) {
 209                 nptr = sc->participates->next;
 210                 free(sc->participates);
 211                 sc->participates = nptr;
 212         }
 213         while (sc->ignet_push_shares != NULL) {
 214                 mptr = sc->ignet_push_shares->next;
 215                 free(sc->ignet_push_shares);
 216                 sc->ignet_push_shares = mptr;
 217         }
 218         free(sc->misc);
 219         free(sc);
 220         *scc=NULL;
 221 }
 222
 223 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 224 {
 225         char tempfilename[PATH_MAX];
 226         int TmpFD;
 227         SpoolControl *sc;
 228         namelist *nptr = NULL;
 229         maplist *mptr = NULL;
 230         long len;
 231         time_t unixtime;
 232         struct timeval tv;
 233         long reltid; /* if we don't have SYS_gettid, use "random" value */
 234         StrBuf *Cfg;
 235         int rc;
 236
 237         len = strlen(filename);
 238         memcpy(tempfilename, filename, len + 1);
 239
 240
 241 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 242         reltid = syscall(SYS_gettid);
 243 #endif
 244         gettimeofday(&tv, NULL);
 245         /* Promote to time_t; types differ on some OSes (like darwin) */
 246         unixtime = tv.tv_sec;
 247
 248         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 249         sc = *scc;
 250         errno = 0;
 251         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 252         Cfg = NewStrBuf();
 253         if ((TmpFD < 0) || (errno != 0)) {
 254                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 255                         filename, strerror(errno));
 256                 free_spoolcontrol_struct(scc);
 257                 unlink(tempfilename);
 258         }
 259         else {
 260                 fchown(TmpFD, config.c_ctdluid, 0);
 261                 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
 262
 263                 /* Write out the listrecps while freeing from memory at the
 264                  * same time.  Am I clever or what?  :)
 265                  */
 266                 while (sc->listrecps != NULL) {
 267                     StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
 268                         nptr = sc->listrecps->next;
 269                         free(sc->listrecps);
 270                         sc->listrecps = nptr;
 271                 }
 272                 /* Do the same for digestrecps */
 273                 while (sc->digestrecps != NULL) {
 274                         StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
 275                         nptr = sc->digestrecps->next;
 276                         free(sc->digestrecps);
 277                         sc->digestrecps = nptr;
 278                 }
 279                 /* Do the same for participates */
 280                 while (sc->participates != NULL) {
 281                         StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
 282                         nptr = sc->participates->next;
 283                         free(sc->participates);
 284                         sc->participates = nptr;
 285                 }
 286                 while (sc->ignet_push_shares != NULL) {
 287                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
 288                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
 289                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
 290                         }
 291                         StrBufAppendPrintf(Cfg, "\n");
 292                         mptr = sc->ignet_push_shares->next;
 293                         free(sc->ignet_push_shares);
 294                         sc->ignet_push_shares = mptr;
 295                 }
 296                 if (sc->misc != NULL) {
 297                         StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
 298                 }
 299                 free(sc->misc);
 300
 301                 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
 302                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
 303                 {
 304                         close(TmpFD);
 305                         rename(tempfilename, filename);
 306                 }
 307                 else {
 308                         syslog(LOG_EMERG,
 309                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 310                                       tempfilename,
 311                                       strerror(errno));
 312                         close(TmpFD);
 313                         unlink(tempfilename);
 314                 }
 315                 FreeStrBuf(&Cfg);
 316                 free(sc);
 317                 *scc=NULL;
 318         }
 319         return 1;
 320 }
 321 int is_recipient(SpoolControl *sc, const char *Name)
 322 {
 323         namelist *nptr;
 324         size_t len;
 325
 326         len = strlen(Name);
 327         nptr = sc->listrecps;
 328         while (nptr != NULL) {
 329                 if (strncmp(Name, nptr->name, len)==0)
 330                         return 1;
 331                 nptr = nptr->next;
 332         }
 333         /* Do the same for digestrecps */
 334         nptr = sc->digestrecps;
 335         while (nptr != NULL) {
 336                 if (strncmp(Name, nptr->name, len)==0)
 337                         return 1;
 338                 nptr = nptr->next;
 339         }
 340         /* Do the same for participates */
 341         nptr = sc->participates;
 342         while (nptr != NULL) {
 343                 if (strncmp(Name, nptr->name, len)==0)
 344                         return 1;
 345                 nptr = nptr->next;
 346         }
 347         return 0;
 348 }
 349
 350
 351 /*
 352  * Batch up and send all outbound traffic from the current room
 353  */
 354 void network_spoolout_room(RoomProcList *room_to_spool,
 355                            HashList *working_ignetcfg,
 356                            HashList *the_netmap)
 357 {
 358         char buf[SIZ];
 359         char filename[PATH_MAX];
 360         SpoolControl *sc;
 361         int i;
 362
 363         /*
 364          * If the room doesn't exist, don't try to perform its networking tasks.
 365          * Normally this should never happen, but once in a while maybe a room gets
 366          * queued for networking and then deleted before it can happen.
 367          */
 368         if (CtdlGetRoom(&CC->room, room_to_spool->name) != 0) {
 369                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 370                 return;
 371         }
 372
 373         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 374         begin_critical_section(S_NETCONFIGS);
 375
 376         /* Only do net processing for rooms that have netconfigs */
 377         if (!read_spoolcontrol_file(&sc, filename))
 378         {
 379                 end_critical_section(S_NETCONFIGS);
 380                 return;
 381         }
 382         syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
 383
 384         sc->working_ignetcfg = working_ignetcfg;
 385         sc->the_netmap = the_netmap;
 386
 387         /* If there are digest recipients, we have to build a digest */
 388         if (sc->digestrecps != NULL) {
 389                 sc->digestfp = tmpfile();
 390                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
 391         }
 392
 393         /* Do something useful */
 394         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 395                 network_spool_msg, sc);
 396
 397         /* If we wrote a digest, deliver it and then close it */
 398         snprintf(buf, sizeof buf, "room_%s@%s",
 399                 CC->room.QRname, config.c_fqdn);
 400         for (i=0; buf[i]; ++i) {
 401                 buf[i] = tolower(buf[i]);
 402                 if (isspace(buf[i])) buf[i] = '_';
 403         }
 404         if (sc->digestfp != NULL) {
 405                 fprintf(sc->digestfp,   " -----------------------------------"
 406                                         "------------------------------------"
 407                                         "-------\n"
 408                                         "You are subscribed to the '%s' "
 409                                         "list.\n"
 410                                         "To post to the list: %s\n",
 411                                         CC->room.QRname, buf
 412                 );
 413                 network_deliver_digest(sc);     /* deliver and close */
 414         }
 415
 416         /* Now rewrite the config file */
 417         writenfree_spoolcontrol_file(&sc, filename);
 418         end_critical_section(S_NETCONFIGS);
 419 }
 420
 421 /*
 422  * Process a buffer containing a single message from a single file
 423  * from the inbound queue
 424  */
 425 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 426 {
 427         struct CitContext *CCC = CC;
 428         StrBuf *Buf = NULL;
 429         struct CtdlMessage *msg = NULL;
 430         long pos;
 431         int field;
 432         struct recptypes *recp = NULL;
 433         char target_room[ROOMNAMELEN];
 434         struct ser_ret sermsg;
 435         char *oldpath = NULL;
 436         char filename[PATH_MAX];
 437         FILE *fp;
 438         const StrBuf *nexthop = NULL;
 439         unsigned char firstbyte;
 440         unsigned char lastbyte;
 441
 442         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 443
 444         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 445         firstbyte = buffer[0];
 446         lastbyte = buffer[size-1];
 447         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 448                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 449                           size, firstbyte, lastbyte);
 450                 return;
 451         }
 452
 453         /* Set default target room to trash */
 454         strcpy(target_room, TWITROOM);
 455
 456         /* Load the message into memory */
 457         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 458         memset(msg, 0, sizeof(struct CtdlMessage));
 459         msg->cm_magic = CTDLMESSAGE_MAGIC;
 460         msg->cm_anon_type = buffer[1];
 461         msg->cm_format_type = buffer[2];
 462
 463         for (pos = 3; pos < size; ++pos) {
 464                 field = buffer[pos];
 465                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
 466                 pos = pos + strlen(&buffer[(int)pos]);
 467         }
 468
 469         /* Check for message routing */
 470         if (msg->cm_fields['D'] != NULL) {
 471                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 472
 473                         /* route the message */
 474                         Buf = NewStrBufPlain(msg->cm_fields['D'], -1);
 475                         if (is_valid_node(&nexthop,
 476                                           NULL,
 477                                           Buf,
 478                                           working_ignetcfg,
 479                                           the_netmap) == 0)
 480                         {
 481                                 /* prepend our node to the path */
 482                                 if (msg->cm_fields['P'] != NULL) {
 483                                         oldpath = msg->cm_fields['P'];
 484                                         msg->cm_fields['P'] = NULL;
 485                                 }
 486                                 else {
 487                                         oldpath = strdup("unknown_user");
 488                                 }
 489                                 size = strlen(oldpath) + SIZ;
 490                                 msg->cm_fields['P'] = malloc(size);
 491                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
 492                                         config.c_nodename, oldpath);
 493                                 free(oldpath);
 494
 495                                 /* serialize the message */
 496                                 serialize_message(&sermsg, msg);
 497
 498                                 /* now send it */
 499                                 if (StrLength(nexthop) == 0) {
 500                                         nexthop = Buf;
 501                                 }
 502                                 snprintf(filename,
 503                                          sizeof filename,
 504                                          "%s/%s@%lx%x",
 505                                          ctdl_netout_dir,
 506                                          ChrPtr(nexthop),
 507                                          time(NULL),
 508                                          rand()
 509                                 );
 510                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 511                                 fp = fopen(filename, "ab");
 512                                 if (fp != NULL) {
 513                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 514                                         fclose(fp);
 515                                 }
 516                                 else {
 517                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 518                                 }
 519                                 free(sermsg.ser);
 520                                 CtdlFreeMessage(msg);
 521                                 FreeStrBuf(&Buf);
 522                                 return;
 523                         }
 524
 525                         else {  /* invalid destination node name */
 526                                 FreeStrBuf(&Buf);
 527
 528                                 network_bounce(msg,
 529 "A message you sent could not be delivered due to an invalid destination node"
 530 " name.  Please check the address and try sending the message again.\n");
 531                                 msg = NULL;
 532                                 return;
 533
 534                         }
 535                 }
 536         }
 537
 538         /*
 539          * Check to see if we already have a copy of this message, and
 540          * abort its processing if so.  (We used to post a warning to Aide>
 541          * every time this happened, but the network is now so densely
 542          * connected that it's inevitable.)
 543          */
 544         if (network_usetable(msg) != 0) {
 545                 CtdlFreeMessage(msg);
 546                 return;
 547         }
 548
 549         /* Learn network topology from the path */
 550         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
 551                 network_learn_topology(msg->cm_fields['N'],
 552                                        msg->cm_fields['P'],
 553                                        the_netmap,
 554                                        netmap_changed);
 555         }
 556
 557         /* Is the sending node giving us a very persuasive suggestion about
 558          * which room this message should be saved in?  If so, go with that.
 559          */
 560         if (msg->cm_fields['C'] != NULL) {
 561                 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
 562         }
 563
 564         /* Otherwise, does it have a recipient?  If so, validate it... */
 565         else if (msg->cm_fields['R'] != NULL) {
 566                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
 567                 if (recp != NULL) if (recp->num_error != 0) {
 568                         network_bounce(msg,
 569                                 "A message you sent could not be delivered due to an invalid address.\n"
 570                                 "Please check the address and try sending the message again.\n");
 571                         msg = NULL;
 572                         free_recipients(recp);
 573                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 574                         return;
 575                 }
 576                 strcpy(target_room, "");        /* no target room if mail */
 577         }
 578
 579         /* Our last shot at finding a home for this message is to see if
 580          * it has the O field (Originating room) set.
 581          */
 582         else if (msg->cm_fields['O'] != NULL) {
 583                 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
 584         }
 585
 586         /* Strip out fields that are only relevant during transit */
 587         if (msg->cm_fields['D'] != NULL) {
 588                 free(msg->cm_fields['D']);
 589                 msg->cm_fields['D'] = NULL;
 590         }
 591         if (msg->cm_fields['C'] != NULL) {
 592                 free(msg->cm_fields['C']);
 593                 msg->cm_fields['C'] = NULL;
 594         }
 595
 596         /* save the message into a room */
 597         if (PerformNetprocHooks(msg, target_room) == 0) {
 598                 msg->cm_flags = CM_SKIP_HOOKS;
 599                 CtdlSubmitMsg(msg, recp, target_room, 0);
 600         }
 601         CtdlFreeMessage(msg);
 602         free_recipients(recp);
 603 }
 604
 605
 606 /*
 607  * Process a single message from a single file from the inbound queue
 608  */
 609 void network_process_message(FILE *fp,
 610                              long msgstart,
 611                              long msgend,
 612                              HashList *working_ignetcfg,
 613                              HashList *the_netmap,
 614                              int *netmap_changed)
 615 {
 616         long hold_pos;
 617         long size;
 618         char *buffer;
 619
 620         hold_pos = ftell(fp);
 621         size = msgend - msgstart + 1;
 622         buffer = malloc(size);
 623         if (buffer != NULL) {
 624                 fseek(fp, msgstart, SEEK_SET);
 625                 if (fread(buffer, size, 1, fp) > 0) {
 626                         network_process_buffer(buffer,
 627                                                size,
 628                                                working_ignetcfg,
 629                                                the_netmap,
 630                                                netmap_changed);
 631                 }
 632                 free(buffer);
 633         }
 634
 635         fseek(fp, hold_pos, SEEK_SET);
 636 }
 637
 638
 639 /*
 640  * Process a single file from the inbound queue
 641  */
 642 void network_process_file(char *filename,
 643                           HashList *working_ignetcfg,
 644                           HashList *the_netmap,
 645                           int *netmap_changed)
 646 {
 647         struct CitContext *CCC = CC;
 648         FILE *fp;
 649         long msgstart = (-1L);
 650         long msgend = (-1L);
 651         long msgcur = 0L;
 652         int ch;
 653
 654
 655         fp = fopen(filename, "rb");
 656         if (fp == NULL) {
 657                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 658                 return;
 659         }
 660
 661         fseek(fp, 0L, SEEK_END);
 662         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 663         rewind(fp);
 664
 665         /* Look for messages in the data stream and break them out */
 666         while (ch = getc(fp), ch >= 0) {
 667
 668                 if (ch == 255) {
 669                         if (msgstart >= 0L) {
 670                                 msgend = msgcur - 1;
 671                                 network_process_message(fp,
 672                                                         msgstart,
 673                                                         msgend,
 674                                                         working_ignetcfg,
 675                                                         the_netmap,
 676                                                         netmap_changed);
 677                         }
 678                         msgstart = msgcur;
 679                 }
 680
 681                 ++msgcur;
 682         }
 683
 684         msgend = msgcur - 1;
 685         if (msgstart >= 0L) {
 686                 network_process_message(fp,
 687                                         msgstart,
 688                                         msgend,
 689                                         working_ignetcfg,
 690                                         the_netmap,
 691                                         netmap_changed);
 692         }
 693
 694         fclose(fp);
 695         unlink(filename);
 696 }
 697
 698
 699 /*
 700  * Process anything in the inbound queue
 701  */
 702 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 703 {
 704         struct CitContext *CCC = CC;
 705         DIR *dp;
 706         struct dirent *d;
 707         struct stat statbuf;
 708         char filename[PATH_MAX];
 709         static time_t last_spoolin_mtime = 0L;
 710
 711         /*
 712          * Check the spoolin directory's modification time.  If it hasn't
 713          * been touched, we don't need to scan it.
 714          */
 715         if (stat(ctdl_netin_dir, &statbuf)) return;
 716         if (statbuf.st_mtime == last_spoolin_mtime) {
 717                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 718                 return;
 719         }
 720         last_spoolin_mtime = statbuf.st_mtime;
 721         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 722
 723         /*
 724          * Ok, there's something interesting in there, so scan it.
 725          */
 726         dp = opendir(ctdl_netin_dir);
 727         if (dp == NULL) return;
 728
 729         while (d = readdir(dp), d != NULL) {
 730                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
 731                         snprintf(filename,
 732                                 sizeof filename,
 733                                 "%s/%s",
 734                                 ctdl_netin_dir,
 735                                 d->d_name
 736                         );
 737                         network_process_file(filename,
 738                                              working_ignetcfg,
 739                                              the_netmap,
 740                                              netmap_changed);
 741                 }
 742         }
 743
 744         closedir(dp);
 745 }
 746
 747 /*
 748  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 749  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 750  */
 751 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 752 {
 753         struct CitContext *CCC = CC;
 754         IOBuffer IOB;
 755         FDIOBuffer FDIO;
 756         int d_namelen;
 757         DIR *dp;
 758         struct dirent *d;
 759         struct dirent *filedir_entry;
 760         const char *pch;
 761         char spooloutfilename[PATH_MAX];
 762         char filename[PATH_MAX];
 763         const StrBuf *nexthop;
 764         StrBuf *NextHop;
 765         int i;
 766         int nFailed = 0;
 767
 768         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 769         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 770         if (d == NULL)  return;
 771
 772         dp = opendir(ctdl_netout_dir);
 773         if (dp == NULL) {
 774                 free(d);
 775                 return;
 776         }
 777
 778         NextHop = NewStrBuf();
 779         memset(&IOB, 0, sizeof(IOBuffer));
 780         memset(&FDIO, 0, sizeof(FDIOBuffer));
 781         FDIO.IOB = &IOB;
 782
 783         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 784                (filedir_entry != NULL))
 785         {
 786 #ifdef _DIRENT_HAVE_D_NAMELEN
 787                 d_namelen = filedir_entry->d_namelen;
 788 #else
 789
 790 #ifndef DT_UNKNOWN
 791 #define DT_UNKNOWN     0
 792 #define DT_DIR         4
 793 #define DT_REG         8
 794 #define DT_LNK         10
 795
 796 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 797 #define DTTOIF(dirtype)        ((dirtype) << 12)
 798 #endif
 799                 d_namelen = strlen(filedir_entry->d_name);
 800 #endif
 801                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 802                         continue; /* Ignore backup files... */
 803
 804                 if ((d_namelen == 1) &&
 805                     (filedir_entry->d_name[0] == '.'))
 806                         continue;
 807
 808                 if ((d_namelen == 2) &&
 809                     (filedir_entry->d_name[0] == '.') &&
 810                     (filedir_entry->d_name[1] == '.'))
 811                         continue;
 812
 813                 pch = strchr(filedir_entry->d_name, '@');
 814                 if (pch == NULL)
 815                         continue;
 816
 817                 snprintf(filename,
 818                          sizeof filename,
 819                          "%s/%s",
 820                          ctdl_netout_dir,
 821                          filedir_entry->d_name);
 822
 823                 StrBufPlain(NextHop,
 824                             filedir_entry->d_name,
 825                             pch - filedir_entry->d_name);
 826
 827                 snprintf(spooloutfilename,
 828                          sizeof spooloutfilename,
 829                          "%s/%s",
 830                          ctdl_netout_dir,
 831                          ChrPtr(NextHop));
 832
 833                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
 834                 if (network_talking_to(SKEY(NextHop), NTT_CHECK)) {
 835                         nFailed++;
 836                         QN_syslog(LOG_DEBUG,
 837                                   "Currently online with %s - skipping for now\n",
 838                                   ChrPtr(NextHop)
 839                                 );
 840                 }
 841                 else {
 842                         size_t dsize;
 843                         size_t fsize;
 844                         int fd;
 845                         const char *err = NULL;
 846                         network_talking_to(SKEY(NextHop), NTT_ADD);
 847
 848                         IOB.fd = open(filename, O_RDONLY);
 849                         if (IOB.fd == -1) {
 850                                 nFailed++;
 851                                 QN_syslog(LOG_ERR,
 852                                           "failed to open %s for reading due to %s; skipping.\n",
 853                                           filename, strerror(errno)
 854                                         );
 855                                 network_talking_to(SKEY(NextHop), NTT_REMOVE);
 856                                 continue;
 857                         }
 858
 859                         fd = open(spooloutfilename,
 860                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
 861                                   S_IRUSR|S_IWUSR);
 862                         if (fd == -1)
 863                         {
 864                                 fd = open(spooloutfilename,
 865                                           O_EXCL|O_NONBLOCK|O_WRONLY,
 866                                           S_IRUSR | S_IWUSR);
 867                         }
 868                         if (fd == -1) {
 869                                 nFailed++;
 870                                 QN_syslog(LOG_ERR,
 871                                           "failed to open %s for reading due to %s; skipping.\n",
 872                                           spooloutfilename, strerror(errno)
 873                                         );
 874                                 close(IOB.fd);
 875                                 network_talking_to(SKEY(NextHop), NTT_REMOVE);
 876                                 continue;
 877                         }
 878                         dsize = lseek(fd, 0, SEEK_END);
 879                         fsize = lseek(IOB.fd, 0, SEEK_END);
 880
 881                         FDIOBufferInit(&FDIO, &IOB, fd, fsize + dsize);
 882                         FDIO.ChunkSendRemain = fsize;
 883                         FDIO.TotalSentAlready = dsize;
 884                         err = NULL;
 885                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
 886                         if (err == NULL) {
 887                                 unlink(filename);
 888                         }
 889                         else {
 890                                 nFailed++;
 891                                 QN_syslog(LOG_ERR,
 892                                           "failed to append to %s [%s]; rolling back..\n",
 893                                           spooloutfilename, strerror(errno)
 894                                         );
 895                                 /* whoops partial append?? truncate spooloutfilename again! */
 896                                 ftruncate(fd, dsize);
 897                         }
 898                         FDIOBufferDelete(&FDIO);
 899                         close(IOB.fd);
 900                         close(fd);
 901                         network_talking_to(SKEY(NextHop), NTT_REMOVE);
 902                 }
 903         }
 904         closedir(dp);
 905
 906         if (nFailed > 0) {
 907                 FreeStrBuf(&NextHop);
 908                 QN_syslog(LOG_INFO,
 909                           "skipping Spoolcleanup because of %d files unprocessed.\n",
 910                           nFailed
 911                         );
 912
 913                 return;
 914         }
 915
 916         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
 917         dp = opendir(ctdl_netout_dir);
 918         if (dp == NULL) {
 919                 FreeStrBuf(&NextHop);
 920                 free(d);
 921                 return;
 922         }
 923
 924         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 925                (filedir_entry != NULL))
 926         {
 927 #ifdef _DIRENT_HAVE_D_NAMELEN
 928                 d_namelen = filedir_entry->d_namelen;
 929                 d_type = filedir_entry->d_type;
 930 #else
 931
 932 #ifndef DT_UNKNOWN
 933 #define DT_UNKNOWN     0
 934 #define DT_DIR         4
 935 #define DT_REG         8
 936 #define DT_LNK         10
 937
 938 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 939 #define DTTOIF(dirtype)        ((dirtype) << 12)
 940 #endif
 941                 d_namelen = strlen(filedir_entry->d_name);
 942 #endif
 943                 if ((d_namelen == 1) &&
 944                     (filedir_entry->d_name[0] == '.'))
 945                         continue;
 946
 947                 if ((d_namelen == 2) &&
 948                     (filedir_entry->d_name[0] == '.') &&
 949                     (filedir_entry->d_name[1] == '.'))
 950                         continue;
 951
 952                 pch = strchr(filedir_entry->d_name, '@');
 953                 if (pch == NULL) /* no @ in name? consolidated file. */
 954                         continue;
 955
 956                 StrBufPlain(NextHop,
 957                             filedir_entry->d_name,
 958                             pch - filedir_entry->d_name);
 959
 960                 snprintf(filename,
 961                         sizeof filename,
 962                         "%s/%s",
 963                         ctdl_netout_dir,
 964                         filedir_entry->d_name
 965                 );
 966
 967                 i = is_valid_node(&nexthop,
 968                                   NULL,
 969                                   NextHop,
 970                                   working_ignetcfg,
 971                                   the_netmap);
 972
 973                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
 974                         unlink(filename);
 975                 }
 976         }
 977         FreeStrBuf(&NextHop);
 978         free(d);
 979         closedir(dp);
 980 }
 981
 982
 983
 984
 985 /*
 986  * It's ok if these directories already exist.  Just fail silently.
 987  */
 988 void create_spool_dirs(void) {
 989         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
 990                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
 991         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
 992                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
 993         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
 994                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
 995         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
 996                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
 997         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
 998                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 999         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1000                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1001         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1002                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1003         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1004                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1005 }
1006
1007 /*
1008  * Module entry point
1009  */
1010 CTDL_MODULE_INIT(network_spool)
1011 {
1012         if (!threading)
1013         {
1014                 create_spool_dirs();
1015 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1016         }
1017         return "network_spool";
1018 }