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, version 3.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  16  * This is a fairly high-level type of critical section.  It ensures that no
  17  * two threads work on the netconfigs files at the same time.  Since we do
  18  * so many things inside these, here are the rules:
  19  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  20  *  2. Do *not* perform any I/O with the client during these sections.
  21  *
  22  */
  23
  24 /*
  25  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  26  * requests that have not been confirmed will be deleted.
  27  */
  28 #define EXP     259200  /* three days */
  29
  30 #include "sysdep.h"
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <fcntl.h>
  35 #include <ctype.h>
  36 #include <signal.h>
  37 #include <pwd.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <dirent.h>
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52 #ifdef HAVE_SYSCALL_H
  53 # include <syscall.h>
  54 #else
  55 # if HAVE_SYS_SYSCALL_H
  56 #  include <sys/syscall.h>
  57 # endif
  58 #endif
  59
  60 #include <sys/wait.h>
  61 #include <string.h>
  62 #include <limits.h>
  63 #include <libcitadel.h>
  64 #include "citadel.h"
  65 #include "server.h"
  66 #include "citserver.h"
  67 #include "support.h"
  68 #include "config.h"
  69 #include "user_ops.h"
  70 #include "database.h"
  71 #include "msgbase.h"
  72 #include "internet_addressing.h"
  73 #include "serv_network.h"
  74 #include "clientsocket.h"
  75 #include "file_ops.h"
  76 #include "citadel_dirs.h"
  77 #include "threads.h"
  78 #include "context.h"
  79 #include "netconfig.h"
  80 #include "netspool.h"
  81 #include "netmail.h"
  82 #include "ctdl_module.h"
  83
  84 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
  85 {
  86         FILE *fp;
  87         char instr[SIZ];
  88         char buf[SIZ];
  89         char nodename[256];
  90         char roomname[ROOMNAMELEN];
  91         size_t miscsize = 0;
  92         size_t linesize = 0;
  93         int skipthisline = 0;
  94         namelist *nptr = NULL;
  95         maplist *mptr = NULL;
  96         SpoolControl *sc;
  97
  98         fp = fopen(filename, "r");
  99         if (fp == NULL) {
 100                 return 0;
 101         }
 102         sc = malloc(sizeof(SpoolControl));
 103         memset(sc, 0, sizeof(SpoolControl));
 104         *scc = sc;
 105
 106         while (fgets(buf, sizeof buf, fp) != NULL) {
 107                 buf[strlen(buf)-1] = 0;
 108
 109                 extract_token(instr, buf, 0, '|', sizeof instr);
 110                 if (!strcasecmp(instr, strof(lastsent))) {
 111                         sc->lastsent = extract_long(buf, 1);
 112                 }
 113                 else if (!strcasecmp(instr, strof(listrecp))) {
 114                         nptr = (namelist *)
 115                                 malloc(sizeof(namelist));
 116                         nptr->next = sc->listrecps;
 117                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 118                         sc->listrecps = nptr;
 119                 }
 120                 else if (!strcasecmp(instr, strof(participate))) {
 121                         nptr = (namelist *)
 122                                 malloc(sizeof(namelist));
 123                         nptr->next = sc->participates;
 124                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 125                         sc->participates = nptr;
 126                 }
 127                 else if (!strcasecmp(instr, strof(digestrecp))) {
 128                         nptr = (namelist *)
 129                                 malloc(sizeof(namelist));
 130                         nptr->next = sc->digestrecps;
 131                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 132                         sc->digestrecps = nptr;
 133                 }
 134                 else if (!strcasecmp(instr, strof(ignet_push_share))) {
 135                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 136                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 137                         mptr = (maplist *) malloc(sizeof(maplist));
 138                         mptr->next = sc->ignet_push_shares;
 139                         strcpy(mptr->remote_nodename, nodename);
 140                         strcpy(mptr->remote_roomname, roomname);
 141                         sc->ignet_push_shares = mptr;
 142                 }
 143                 else {
 144                         /* Preserve 'other' lines ... *unless* they happen to
 145                          * be subscribe/unsubscribe pendings with expired
 146                          * timestamps.
 147                          */
 148                         skipthisline = 0;
 149                         if (!strncasecmp(buf, strof(subpending)"|", 11)) {
 150                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 151                                         skipthisline = 1;
 152                                 }
 153                         }
 154                         if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
 155                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 156                                         skipthisline = 1;
 157                                 }
 158                         }
 159
 160                         if (skipthisline == 0) {
 161                                 linesize = strlen(buf);
 162                                 sc->misc = realloc(sc->misc,
 163                                         (miscsize + linesize + 2) );
 164                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 165                                 miscsize = miscsize + linesize + 1;
 166                         }
 167                 }
 168
 169
 170         }
 171         fclose(fp);
 172         return 1;
 173 }
 174
 175 void free_spoolcontrol_struct(SpoolControl **scc)
 176 {
 177         SpoolControl *sc;
 178         namelist *nptr = NULL;
 179         maplist *mptr = NULL;
 180
 181         sc = *scc;
 182         while (sc->listrecps != NULL) {
 183                 nptr = sc->listrecps->next;
 184                 free(sc->listrecps);
 185                 sc->listrecps = nptr;
 186         }
 187         /* Do the same for digestrecps */
 188         while (sc->digestrecps != NULL) {
 189                 nptr = sc->digestrecps->next;
 190                 free(sc->digestrecps);
 191                 sc->digestrecps = nptr;
 192         }
 193         /* Do the same for participates */
 194         while (sc->participates != NULL) {
 195                 nptr = sc->participates->next;
 196                 free(sc->participates);
 197                 sc->participates = nptr;
 198         }
 199         while (sc->ignet_push_shares != NULL) {
 200                 mptr = sc->ignet_push_shares->next;
 201                 free(sc->ignet_push_shares);
 202                 sc->ignet_push_shares = mptr;
 203         }
 204         free(sc->misc);
 205         free(sc);
 206         *scc=NULL;
 207 }
 208
 209 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 210 {
 211         char tempfilename[PATH_MAX];
 212         int TmpFD;
 213         SpoolControl *sc;
 214         namelist *nptr = NULL;
 215         maplist *mptr = NULL;
 216         long len;
 217         time_t unixtime;
 218         struct timeval tv;
 219         long reltid; /* if we don't have SYS_gettid, use "random" value */
 220         StrBuf *Cfg;
 221         int rc;
 222
 223         len = strlen(filename);
 224         memcpy(tempfilename, filename, len + 1);
 225
 226
 227 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 228         reltid = syscall(SYS_gettid);
 229 #endif
 230         gettimeofday(&tv, NULL);
 231         /* Promote to time_t; types differ on some OSes (like darwin) */
 232         unixtime = tv.tv_sec;
 233
 234         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 235         sc = *scc;
 236         errno = 0;
 237         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 238         Cfg = NewStrBuf();
 239         if ((TmpFD < 0) || (errno != 0)) {
 240                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 241                         filename, strerror(errno));
 242                 free_spoolcontrol_struct(scc);
 243                 unlink(tempfilename);
 244         }
 245         else {
 246                 fchown(TmpFD, config.c_ctdluid, 0);
 247                 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
 248
 249                 /* Write out the listrecps while freeing from memory at the
 250                  * same time.  Am I clever or what?  :)
 251                  */
 252                 while (sc->listrecps != NULL) {
 253                     StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
 254                         nptr = sc->listrecps->next;
 255                         free(sc->listrecps);
 256                         sc->listrecps = nptr;
 257                 }
 258                 /* Do the same for digestrecps */
 259                 while (sc->digestrecps != NULL) {
 260                         StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
 261                         nptr = sc->digestrecps->next;
 262                         free(sc->digestrecps);
 263                         sc->digestrecps = nptr;
 264                 }
 265                 /* Do the same for participates */
 266                 while (sc->participates != NULL) {
 267                         StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
 268                         nptr = sc->participates->next;
 269                         free(sc->participates);
 270                         sc->participates = nptr;
 271                 }
 272                 while (sc->ignet_push_shares != NULL) {
 273                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
 274                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
 275                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
 276                         }
 277                         StrBufAppendPrintf(Cfg, "\n");
 278                         mptr = sc->ignet_push_shares->next;
 279                         free(sc->ignet_push_shares);
 280                         sc->ignet_push_shares = mptr;
 281                 }
 282                 if (sc->misc != NULL) {
 283                         StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
 284                 }
 285                 free(sc->misc);
 286
 287                 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
 288                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
 289                 {
 290                         close(TmpFD);
 291                         rename(tempfilename, filename);
 292                 }
 293                 else {
 294                         syslog(LOG_EMERG,
 295                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 296                                       tempfilename,
 297                                       strerror(errno));
 298                         close(TmpFD);
 299                         unlink(tempfilename);
 300                 }
 301                 FreeStrBuf(&Cfg);
 302                 free(sc);
 303                 *scc=NULL;
 304         }
 305         return 1;
 306 }
 307 int is_recipient(SpoolControl *sc, const char *Name)
 308 {
 309         namelist *nptr;
 310         size_t len;
 311
 312         len = strlen(Name);
 313         nptr = sc->listrecps;
 314         while (nptr != NULL) {
 315                 if (strncmp(Name, nptr->name, len)==0)
 316                         return 1;
 317                 nptr = nptr->next;
 318         }
 319         /* Do the same for digestrecps */
 320         nptr = sc->digestrecps;
 321         while (nptr != NULL) {
 322                 if (strncmp(Name, nptr->name, len)==0)
 323                         return 1;
 324                 nptr = nptr->next;
 325         }
 326         /* Do the same for participates */
 327         nptr = sc->participates;
 328         while (nptr != NULL) {
 329                 if (strncmp(Name, nptr->name, len)==0)
 330                         return 1;
 331                 nptr = nptr->next;
 332         }
 333         return 0;
 334 }
 335
 336
 337 /*
 338  * Batch up and send all outbound traffic from the current room
 339  */
 340 void network_spoolout_room(RoomProcList *room_to_spool,
 341                            HashList *working_ignetcfg,
 342                            HashList *the_netmap)
 343 {
 344         char buf[SIZ];
 345         char filename[PATH_MAX];
 346         SpoolControl *sc;
 347         int i;
 348
 349         /*
 350          * If the room doesn't exist, don't try to perform its networking tasks.
 351          * Normally this should never happen, but once in a while maybe a room gets
 352          * queued for networking and then deleted before it can happen.
 353          */
 354         if (CtdlGetRoom(&CC->room, room_to_spool->name) != 0) {
 355                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 356                 return;
 357         }
 358
 359         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 360         begin_critical_section(S_NETCONFIGS);
 361
 362         /* Only do net processing for rooms that have netconfigs */
 363         if (!read_spoolcontrol_file(&sc, filename))
 364         {
 365                 end_critical_section(S_NETCONFIGS);
 366                 return;
 367         }
 368         syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
 369
 370         sc->working_ignetcfg = working_ignetcfg;
 371         sc->the_netmap = the_netmap;
 372
 373         /* If there are digest recipients, we have to build a digest */
 374         if (sc->digestrecps != NULL) {
 375                 sc->digestfp = tmpfile();
 376                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
 377         }
 378
 379         /* Do something useful */
 380         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 381                 network_spool_msg, sc);
 382
 383         /* If we wrote a digest, deliver it and then close it */
 384         snprintf(buf, sizeof buf, "room_%s@%s",
 385                 CC->room.QRname, config.c_fqdn);
 386         for (i=0; buf[i]; ++i) {
 387                 buf[i] = tolower(buf[i]);
 388                 if (isspace(buf[i])) buf[i] = '_';
 389         }
 390         if (sc->digestfp != NULL) {
 391                 fprintf(sc->digestfp,   " -----------------------------------"
 392                                         "------------------------------------"
 393                                         "-------\n"
 394                                         "You are subscribed to the '%s' "
 395                                         "list.\n"
 396                                         "To post to the list: %s\n",
 397                                         CC->room.QRname, buf
 398                 );
 399                 network_deliver_digest(sc);     /* deliver and close */
 400         }
 401
 402         /* Now rewrite the config file */
 403         writenfree_spoolcontrol_file(&sc, filename);
 404         end_critical_section(S_NETCONFIGS);
 405 }
 406
 407 /*
 408  * Process a buffer containing a single message from a single file
 409  * from the inbound queue
 410  */
 411 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 412 {
 413         struct CitContext *CCC = CC;
 414         StrBuf *Buf = NULL;
 415         struct CtdlMessage *msg = NULL;
 416         long pos;
 417         int field;
 418         struct recptypes *recp = NULL;
 419         char target_room[ROOMNAMELEN];
 420         struct ser_ret sermsg;
 421         char *oldpath = NULL;
 422         char filename[PATH_MAX];
 423         FILE *fp;
 424         const StrBuf *nexthop = NULL;
 425         unsigned char firstbyte;
 426         unsigned char lastbyte;
 427
 428         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 429
 430         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 431         firstbyte = buffer[0];
 432         lastbyte = buffer[size-1];
 433         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 434                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 435                           size, firstbyte, lastbyte);
 436                 return;
 437         }
 438
 439         /* Set default target room to trash */
 440         strcpy(target_room, TWITROOM);
 441
 442         /* Load the message into memory */
 443         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 444         memset(msg, 0, sizeof(struct CtdlMessage));
 445         msg->cm_magic = CTDLMESSAGE_MAGIC;
 446         msg->cm_anon_type = buffer[1];
 447         msg->cm_format_type = buffer[2];
 448
 449         for (pos = 3; pos < size; ++pos) {
 450                 field = buffer[pos];
 451                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
 452                 pos = pos + strlen(&buffer[(int)pos]);
 453         }
 454
 455         /* Check for message routing */
 456         if (msg->cm_fields['D'] != NULL) {
 457                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 458
 459                         /* route the message */
 460                         Buf = NewStrBufPlain(msg->cm_fields['D'], -1);
 461                         if (is_valid_node(&nexthop,
 462                                           NULL,
 463                                           Buf,
 464                                           working_ignetcfg,
 465                                           the_netmap) == 0)
 466                         {
 467                                 /* prepend our node to the path */
 468                                 if (msg->cm_fields['P'] != NULL) {
 469                                         oldpath = msg->cm_fields['P'];
 470                                         msg->cm_fields['P'] = NULL;
 471                                 }
 472                                 else {
 473                                         oldpath = strdup("unknown_user");
 474                                 }
 475                                 size = strlen(oldpath) + SIZ;
 476                                 msg->cm_fields['P'] = malloc(size);
 477                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
 478                                         config.c_nodename, oldpath);
 479                                 free(oldpath);
 480
 481                                 /* serialize the message */
 482                                 serialize_message(&sermsg, msg);
 483
 484                                 /* now send it */
 485                                 if (StrLength(nexthop) == 0) {
 486                                         nexthop = Buf;
 487                                 }
 488                                 snprintf(filename,
 489                                          sizeof filename,
 490                                          "%s/%s@%lx%x",
 491                                          ctdl_netout_dir,
 492                                          ChrPtr(nexthop),
 493                                          time(NULL),
 494                                          rand()
 495                                 );
 496                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 497                                 fp = fopen(filename, "ab");
 498                                 if (fp != NULL) {
 499                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 500                                         fclose(fp);
 501                                 }
 502                                 else {
 503                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 504                                 }
 505                                 free(sermsg.ser);
 506                                 CtdlFreeMessage(msg);
 507                                 FreeStrBuf(&Buf);
 508                                 return;
 509                         }
 510
 511                         else {  /* invalid destination node name */
 512                                 FreeStrBuf(&Buf);
 513
 514                                 network_bounce(msg,
 515 "A message you sent could not be delivered due to an invalid destination node"
 516 " name.  Please check the address and try sending the message again.\n");
 517                                 msg = NULL;
 518                                 return;
 519
 520                         }
 521                 }
 522         }
 523
 524         /*
 525          * Check to see if we already have a copy of this message, and
 526          * abort its processing if so.  (We used to post a warning to Aide>
 527          * every time this happened, but the network is now so densely
 528          * connected that it's inevitable.)
 529          */
 530         if (network_usetable(msg) != 0) {
 531                 CtdlFreeMessage(msg);
 532                 return;
 533         }
 534
 535         /* Learn network topology from the path */
 536         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
 537                 network_learn_topology(msg->cm_fields['N'],
 538                                        msg->cm_fields['P'],
 539                                        the_netmap,
 540                                        netmap_changed);
 541         }
 542
 543         /* Is the sending node giving us a very persuasive suggestion about
 544          * which room this message should be saved in?  If so, go with that.
 545          */
 546         if (msg->cm_fields['C'] != NULL) {
 547                 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
 548         }
 549
 550         /* Otherwise, does it have a recipient?  If so, validate it... */
 551         else if (msg->cm_fields['R'] != NULL) {
 552                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
 553                 if (recp != NULL) if (recp->num_error != 0) {
 554                         network_bounce(msg,
 555                                 "A message you sent could not be delivered due to an invalid address.\n"
 556                                 "Please check the address and try sending the message again.\n");
 557                         msg = NULL;
 558                         free_recipients(recp);
 559                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 560                         return;
 561                 }
 562                 strcpy(target_room, "");        /* no target room if mail */
 563         }
 564
 565         /* Our last shot at finding a home for this message is to see if
 566          * it has the O field (Originating room) set.
 567          */
 568         else if (msg->cm_fields['O'] != NULL) {
 569                 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
 570         }
 571
 572         /* Strip out fields that are only relevant during transit */
 573         if (msg->cm_fields['D'] != NULL) {
 574                 free(msg->cm_fields['D']);
 575                 msg->cm_fields['D'] = NULL;
 576         }
 577         if (msg->cm_fields['C'] != NULL) {
 578                 free(msg->cm_fields['C']);
 579                 msg->cm_fields['C'] = NULL;
 580         }
 581
 582         /* save the message into a room */
 583         if (PerformNetprocHooks(msg, target_room) == 0) {
 584                 msg->cm_flags = CM_SKIP_HOOKS;
 585                 CtdlSubmitMsg(msg, recp, target_room, 0);
 586         }
 587         CtdlFreeMessage(msg);
 588         free_recipients(recp);
 589 }
 590
 591
 592 /*
 593  * Process a single message from a single file from the inbound queue
 594  */
 595 void network_process_message(FILE *fp,
 596                              long msgstart,
 597                              long msgend,
 598                              HashList *working_ignetcfg,
 599                              HashList *the_netmap,
 600                              int *netmap_changed)
 601 {
 602         long hold_pos;
 603         long size;
 604         char *buffer;
 605
 606         hold_pos = ftell(fp);
 607         size = msgend - msgstart + 1;
 608         buffer = malloc(size);
 609         if (buffer != NULL) {
 610                 fseek(fp, msgstart, SEEK_SET);
 611                 if (fread(buffer, size, 1, fp) > 0) {
 612                         network_process_buffer(buffer,
 613                                                size,
 614                                                working_ignetcfg,
 615                                                the_netmap,
 616                                                netmap_changed);
 617                 }
 618                 free(buffer);
 619         }
 620
 621         fseek(fp, hold_pos, SEEK_SET);
 622 }
 623
 624
 625 /*
 626  * Process a single file from the inbound queue
 627  */
 628 void network_process_file(char *filename,
 629                           HashList *working_ignetcfg,
 630                           HashList *the_netmap,
 631                           int *netmap_changed)
 632 {
 633         struct CitContext *CCC = CC;
 634         FILE *fp;
 635         long msgstart = (-1L);
 636         long msgend = (-1L);
 637         long msgcur = 0L;
 638         int ch;
 639
 640
 641         fp = fopen(filename, "rb");
 642         if (fp == NULL) {
 643                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 644                 return;
 645         }
 646
 647         fseek(fp, 0L, SEEK_END);
 648         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 649         rewind(fp);
 650
 651         /* Look for messages in the data stream and break them out */
 652         while (ch = getc(fp), ch >= 0) {
 653
 654                 if (ch == 255) {
 655                         if (msgstart >= 0L) {
 656                                 msgend = msgcur - 1;
 657                                 network_process_message(fp,
 658                                                         msgstart,
 659                                                         msgend,
 660                                                         working_ignetcfg,
 661                                                         the_netmap,
 662                                                         netmap_changed);
 663                         }
 664                         msgstart = msgcur;
 665                 }
 666
 667                 ++msgcur;
 668         }
 669
 670         msgend = msgcur - 1;
 671         if (msgstart >= 0L) {
 672                 network_process_message(fp,
 673                                         msgstart,
 674                                         msgend,
 675                                         working_ignetcfg,
 676                                         the_netmap,
 677                                         netmap_changed);
 678         }
 679
 680         fclose(fp);
 681         unlink(filename);
 682 }
 683
 684
 685 /*
 686  * Process anything in the inbound queue
 687  */
 688 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 689 {
 690         struct CitContext *CCC = CC;
 691         DIR *dp;
 692         struct dirent *d;
 693         struct stat statbuf;
 694         char filename[PATH_MAX];
 695         static time_t last_spoolin_mtime = 0L;
 696
 697         /*
 698          * Check the spoolin directory's modification time.  If it hasn't
 699          * been touched, we don't need to scan it.
 700          */
 701         if (stat(ctdl_netin_dir, &statbuf)) return;
 702         if (statbuf.st_mtime == last_spoolin_mtime) {
 703                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 704                 return;
 705         }
 706         last_spoolin_mtime = statbuf.st_mtime;
 707         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 708
 709         /*
 710          * Ok, there's something interesting in there, so scan it.
 711          */
 712         dp = opendir(ctdl_netin_dir);
 713         if (dp == NULL) return;
 714
 715         while (d = readdir(dp), d != NULL) {
 716                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
 717                         snprintf(filename,
 718                                 sizeof filename,
 719                                 "%s/%s",
 720                                 ctdl_netin_dir,
 721                                 d->d_name
 722                         );
 723                         network_process_file(filename,
 724                                              working_ignetcfg,
 725                                              the_netmap,
 726                                              netmap_changed);
 727                 }
 728         }
 729
 730         closedir(dp);
 731 }
 732
 733 /*
 734  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 735  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 736  */
 737 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 738 {
 739         struct CitContext *CCC = CC;
 740         IOBuffer IOB;
 741         FDIOBuffer FDIO;
 742         int d_namelen;
 743         DIR *dp;
 744         struct dirent *d;
 745         struct dirent *filedir_entry;
 746         const char *pch;
 747         char spooloutfilename[PATH_MAX];
 748         char filename[PATH_MAX];
 749         const StrBuf *nexthop;
 750         StrBuf *NextHop;
 751         int i;
 752         struct stat statbuf;
 753         int nFailed = 0;
 754
 755         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 756         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 757         if (d == NULL)  return;
 758
 759         dp = opendir(ctdl_netout_dir);
 760         if (dp == NULL) {
 761                 free(d);
 762                 return;
 763         }
 764
 765         NextHop = NewStrBuf();
 766         memset(&IOB, 0, sizeof(IOBuffer));
 767         memset(&FDIO, 0, sizeof(FDIOBuffer));
 768         FDIO.IOB = &IOB;
 769
 770         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 771                (filedir_entry != NULL))
 772         {
 773 #ifdef _DIRENT_HAVE_D_NAMELEN
 774                 d_namelen = filedir_entry->d_namelen;
 775 #else
 776
 777 #ifndef DT_UNKNOWN
 778 #define DT_UNKNOWN     0
 779 #define DT_DIR         4
 780 #define DT_REG         8
 781 #define DT_LNK         10
 782
 783 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 784 #define DTTOIF(dirtype)        ((dirtype) << 12)
 785 #endif
 786                 d_namelen = strlen(filedir_entry->d_name);
 787 #endif
 788                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 789                         continue; /* Ignore backup files... */
 790
 791                 if ((d_namelen == 1) &&
 792                     (filedir_entry->d_name[0] == '.'))
 793                         continue;
 794
 795                 if ((d_namelen == 2) &&
 796                     (filedir_entry->d_name[0] == '.') &&
 797                     (filedir_entry->d_name[1] == '.'))
 798                         continue;
 799
 800                 pch = strchr(filedir_entry->d_name, '@');
 801                 if (pch == NULL)
 802                         continue;
 803
 804                 snprintf(filename,
 805                          sizeof filename,
 806                          "%s/%s",
 807                          ctdl_netout_dir,
 808                          filedir_entry->d_name);
 809
 810                 StrBufPlain(NextHop,
 811                             filedir_entry->d_name,
 812                             pch - filedir_entry->d_name);
 813
 814                 snprintf(spooloutfilename,
 815                          sizeof spooloutfilename,
 816                          "%s/%s",
 817                          ctdl_netout_dir,
 818                          ChrPtr(NextHop));
 819
 820                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
 821                 if (network_talking_to(SKEY(NextHop), NTT_CHECK)) {
 822                         nFailed++;
 823                         QN_syslog(LOG_DEBUG,
 824                                   "Currently online with %s - skipping for now\n",
 825                                   ChrPtr(NextHop)
 826                                 );
 827                 }
 828                 else {
 829                         size_t dsize;
 830                         size_t fsize;
 831                         int infd, outfd;
 832                         const char *err = NULL;
 833                         network_talking_to(SKEY(NextHop), NTT_ADD);
 834
 835                         infd = open(filename, O_RDONLY);
 836                         if (infd == -1) {
 837                                 nFailed++;
 838                                 QN_syslog(LOG_ERR,
 839                                           "failed to open %s for reading due to %s; skipping.\n",
 840                                           filename, strerror(errno)
 841                                         );
 842                                 network_talking_to(SKEY(NextHop), NTT_REMOVE);
 843                                 continue;
 844                         }
 845
 846                         outfd = open(spooloutfilename,
 847                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
 848                                   S_IRUSR|S_IWUSR);
 849                         if (outfd == -1)
 850                         {
 851                                 outfd = open(spooloutfilename,
 852                                              O_EXCL|O_NONBLOCK|O_WRONLY,
 853                                              S_IRUSR | S_IWUSR);
 854                         }
 855                         if (outfd == -1) {
 856                                 nFailed++;
 857                                 QN_syslog(LOG_ERR,
 858                                           "failed to open %s for reading due to %s; skipping.\n",
 859                                           spooloutfilename, strerror(errno)
 860                                         );
 861                                 close(infd);
 862                                 network_talking_to(SKEY(NextHop), NTT_REMOVE);
 863                                 continue;
 864                         }
 865
 866                         dsize = lseek(outfd, 0, SEEK_END);
 867                         lseek(outfd, -dsize, SEEK_SET);
 868
 869                         fstat(infd, &statbuf);
 870                         fsize = statbuf.st_size;
 871 /*
 872                         fsize = lseek(infd, 0, SEEK_END);
 873 */
 874                         IOB.fd = infd;
 875                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
 876                         FDIO.ChunkSendRemain = fsize;
 877                         FDIO.TotalSentAlready = dsize;
 878                         err = NULL;
 879                         errno = 0;
 880                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
 881                         if (err == NULL) {
 882                                 unlink(filename);
 883                         }
 884                         else {
 885                                 nFailed++;
 886                                 QN_syslog(LOG_ERR,
 887                                           "failed to append to %s [%s]; rolling back..\n",
 888                                           spooloutfilename, strerror(errno)
 889                                         );
 890                                 /* whoops partial append?? truncate spooloutfilename again! */
 891                                 ftruncate(outfd, dsize);
 892                         }
 893                         FDIOBufferDelete(&FDIO);
 894                         close(infd);
 895                         close(outfd);
 896                         network_talking_to(SKEY(NextHop), NTT_REMOVE);
 897                 }
 898         }
 899         closedir(dp);
 900
 901         if (nFailed > 0) {
 902                 FreeStrBuf(&NextHop);
 903                 QN_syslog(LOG_INFO,
 904                           "skipping Spoolcleanup because of %d files unprocessed.\n",
 905                           nFailed
 906                         );
 907
 908                 return;
 909         }
 910
 911         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
 912         dp = opendir(ctdl_netout_dir);
 913         if (dp == NULL) {
 914                 FreeStrBuf(&NextHop);
 915                 free(d);
 916                 return;
 917         }
 918
 919         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 920                (filedir_entry != NULL))
 921         {
 922 #ifdef _DIRENT_HAVE_D_NAMELEN
 923                 d_namelen = filedir_entry->d_namelen;
 924                 d_type = filedir_entry->d_type;
 925 #else
 926
 927 #ifndef DT_UNKNOWN
 928 #define DT_UNKNOWN     0
 929 #define DT_DIR         4
 930 #define DT_REG         8
 931 #define DT_LNK         10
 932
 933 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 934 #define DTTOIF(dirtype)        ((dirtype) << 12)
 935 #endif
 936                 d_namelen = strlen(filedir_entry->d_name);
 937 #endif
 938                 if ((d_namelen == 1) &&
 939                     (filedir_entry->d_name[0] == '.'))
 940                         continue;
 941
 942                 if ((d_namelen == 2) &&
 943                     (filedir_entry->d_name[0] == '.') &&
 944                     (filedir_entry->d_name[1] == '.'))
 945                         continue;
 946
 947                 pch = strchr(filedir_entry->d_name, '@');
 948                 if (pch == NULL) /* no @ in name? consolidated file. */
 949                         continue;
 950
 951                 StrBufPlain(NextHop,
 952                             filedir_entry->d_name,
 953                             pch - filedir_entry->d_name);
 954
 955                 snprintf(filename,
 956                         sizeof filename,
 957                         "%s/%s",
 958                         ctdl_netout_dir,
 959                         filedir_entry->d_name
 960                 );
 961
 962                 i = is_valid_node(&nexthop,
 963                                   NULL,
 964                                   NextHop,
 965                                   working_ignetcfg,
 966                                   the_netmap);
 967
 968                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
 969                         unlink(filename);
 970                 }
 971         }
 972         FreeStrBuf(&NextHop);
 973         free(d);
 974         closedir(dp);
 975 }
 976
 977
 978
 979
 980 /*
 981  * It's ok if these directories already exist.  Just fail silently.
 982  */
 983 void create_spool_dirs(void) {
 984         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
 985                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
 986         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
 987                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
 988         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
 989                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
 990         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
 991                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
 992         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
 993                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 994         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
 995                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
 996         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
 997                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
 998         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
 999                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1000 }
1001
1002 /*
1003  * Module entry point
1004  */
1005 CTDL_MODULE_INIT(network_spool)
1006 {
1007         if (!threading)
1008         {
1009                 create_spool_dirs();
1010 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1011         }
1012         return "network_spool";
1013 }