citadel/netproc.c

   1 /*
   2  * Citadel/UX Intelligent Network Processor for IGnet/Open networks
   3  * See copyright.txt for copyright information
   4  * $Id$
   5  */
   6
   7 /* How long it takes for an old node to drop off the network map */
   8 #define EXPIRY_TIME     (2592000L)
   9
  10 /* How long we keep recently arrived messages in the use table */
  11 #define USE_TIME        (604800L)
  12
  13 /* Where do we keep our lock file? */
  14 #define LOCKFILE        "/var/lock/LCK.netproc"
  15
  16 /* Path to the 'uudecode' utility (needed for network file transfers) */
  17 #define UUDECODE        "/usr/bin/uudecode"
  18
  19 /* Uncomment the DEBUG def to see noisy traces */
  20 /* #define DEBUG 1 */
  21
  22
  23 #include "sysdep.h"
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <sys/types.h>
  27 #include <sys/wait.h>
  28 #include <string.h>
  29 #include <fcntl.h>
  30 #include <stdio.h>
  31 #include <ctype.h>
  32 #include <time.h>
  33 #include <signal.h>
  34 #include <errno.h>
  35 #include <syslog.h>
  36 #ifdef HAVE_GDBM_H
  37 #include <gdbm.h>
  38 #endif
  39 #include "citadel.h"
  40 #include "tools.h"
  41
  42 /* A list of users you wish to filter out of incoming traffic can be kept
  43  * in ./network/filterlist -- messages from these users will be automatically
  44  * moved to FILTERROOM.  Normally this will be the same as TWITROOM (the
  45  * room problem user messages are moved to) but you can override this by
  46  * specifying a different room name here.
  47  */
  48 #ifndef FILTERROOM
  49 #define FILTERROOM TWITROOM
  50 #endif
  51
  52 struct msglist {
  53         struct msglist *next;
  54         long m_num;
  55         char m_rmname[ROOMNAMELEN];
  56 };
  57
  58 struct rmlist {
  59         struct rmlist *next;
  60         char rm_name[ROOMNAMELEN];
  61         long rm_lastsent;
  62 };
  63
  64 struct filterlist {
  65         struct filterlist *next;
  66         char f_person[64];
  67         char f_room[64];
  68         char f_system[64];
  69 };
  70
  71 struct syslist {
  72         struct syslist *next;
  73         char s_name[16];
  74         char s_type[4];
  75         char s_nexthop[128];
  76         time_t s_lastcontact;
  77         char s_humannode[64];
  78         char s_phonenum[32];
  79         char s_gdom[64];
  80 };
  81
  82
  83 void attach_to_server(int argc, char **argv);
  84 void serv_read(char *buf, int bytes);
  85 void serv_write(char *buf, int nbytes);
  86 void get_config(void);
  87
  88 struct filterlist *filter = NULL;
  89 struct syslist *slist = NULL;
  90
  91 struct config config;
  92 extern char bbs_home_directory[];
  93 extern int home_specified;
  94
  95
  96 #ifndef HAVE_STRERROR
  97 /*
  98  * replacement strerror() for systems that don't have it
  99  */
 100 char *strerror(int e)
 101 {
 102         static char buf[32];
 103
 104         sprintf(buf, "errno = %d", e);
 105         return (buf);
 106 }
 107 #endif
 108
 109
 110 void strip_trailing_whitespace(char *buf)
 111 {
 112         while (isspace(buf[strlen(buf) - 1]))
 113                 buf[strlen(buf) - 1] = 0;
 114 }
 115
 116
 117 /*
 118  * we also load the network/mail.sysinfo table into memory, make changes
 119  * as we learn more about the network from incoming messages, and write
 120  * the table back to disk when we're done.
 121  */
 122 int load_syslist(void)
 123 {
 124         FILE *fp;
 125         struct syslist *stemp;
 126         char insys = 0;
 127         char buf[128];
 128
 129         fp = fopen("network/mail.sysinfo", "r");
 130         if (fp == NULL)
 131                 return (1);
 132
 133         while (1) {
 134                 if (fgets(buf, 128, fp) == NULL) {
 135                         fclose(fp);
 136                         return (0);
 137                 }
 138                 buf[strlen(buf) - 1] = 0;
 139                 while (isspace(buf[0]))
 140                         strcpy(buf, &buf[1]);
 141                 if (buf[0] == '#')
 142                         buf[0] = 0;
 143                 if ((insys == 0) && (strlen(buf) != 0)) {
 144                         insys = 1;
 145                         stemp = (struct syslist *) malloc(sizeof(struct syslist));
 146                         stemp->next = slist;
 147                         slist = stemp;
 148                         strcpy(slist->s_name, buf);
 149                         strcpy(slist->s_type, "bin");
 150                         strcpy(slist->s_nexthop, "Mail");
 151                         slist->s_lastcontact = 0L;
 152                         strcpy(slist->s_humannode, "");
 153                         strcpy(slist->s_phonenum, "");
 154                         strcpy(slist->s_gdom, "");
 155                 } else if ((insys == 1) && (strlen(buf) == 0)) {
 156                         insys = 0;
 157                 } else if ((insys == 1) && (!strncasecmp(buf, "bin", 3))) {
 158                         strcpy(slist->s_type, "bin");
 159                         strcpy(slist->s_nexthop, &buf[4]);
 160                 } else if ((insys == 1) && (!strncasecmp(buf, "use", 3))) {
 161                         strcpy(slist->s_type, "use");
 162                         strcpy(slist->s_nexthop, &buf[4]);
 163                 } else if ((insys == 1) && (!strncasecmp(buf, "uum", 3))) {
 164                         strcpy(slist->s_type, "uum");
 165                         strcpy(slist->s_nexthop, &buf[4]);
 166                 } else if ((insys == 1) && (!strncasecmp(buf, "lastcontact", 11))) {
 167                         long foo;
 168                         sscanf(&buf[12], "%ld", &foo);
 169                         slist->s_lastcontact = foo;
 170                 } else if ((insys == 1) && (!strncasecmp(buf, "humannode", 9))) {
 171                         strcpy(slist->s_humannode, &buf[10]);
 172                 } else if ((insys == 1) && (!strncasecmp(buf, "phonenum", 8))) {
 173                         strcpy(slist->s_phonenum, &buf[9]);
 174                 } else if ((insys == 1) && (!strncasecmp(buf, "gdom", 4))) {
 175                         strcpy(slist->s_gdom, &buf[5]);
 176                 }
 177         }
 178 }
 179
 180 /* now we have to set up two "special" nodes on the list: one
 181  * for the local node, and one for an Internet gateway
 182  */
 183 void setup_special_nodes(void)
 184 {
 185         struct syslist *stemp, *slocal;
 186
 187         slocal = NULL;
 188         for (stemp = slist; stemp != NULL; stemp = stemp->next) {
 189                 if (!strcasecmp(stemp->s_name, config.c_nodename))
 190                         slocal = stemp;
 191         }
 192         if (slocal == NULL) {
 193                 slocal = (struct syslist *) malloc(sizeof(struct syslist));
 194                 slocal->next = slist;
 195                 slist = slocal;
 196         }
 197         strcpy(slocal->s_name, config.c_nodename);
 198         strcpy(slocal->s_type, "bin");
 199         strcpy(slocal->s_nexthop, "Mail");
 200         time(&slocal->s_lastcontact);
 201         strcpy(slocal->s_humannode, config.c_humannode);
 202         strcpy(slocal->s_phonenum, config.c_phonenum);
 203
 204         slocal = NULL;
 205         for (stemp = slist; stemp != NULL; stemp = stemp->next) {
 206                 if (!strcasecmp(stemp->s_name, "internet"))
 207                         slocal = stemp;
 208         }
 209         if (slocal == NULL) {
 210                 slocal = (struct syslist *) malloc(sizeof(struct syslist));
 211                 slocal->next = slist;
 212                 slist = slocal;
 213         }
 214         strcpy(slocal->s_name, "internet");
 215         strcpy(slocal->s_type, "uum");
 216         strcpy(slocal->s_nexthop, "%s");
 217         time(&slocal->s_lastcontact);
 218         strcpy(slocal->s_humannode, "Internet Gateway");
 219         strcpy(slocal->s_phonenum, "");
 220         strcpy(slocal->s_gdom, "");
 221
 222 }
 223
 224 /*
 225  * here's the routine to write the table back to disk.
 226  */
 227 void rewrite_syslist(void)
 228 {
 229         struct syslist *stemp;
 230         FILE *newfp;
 231         time_t now;
 232
 233         time(&now);
 234         newfp = fopen("network/mail.sysinfo", "w");
 235         for (stemp = slist; stemp != NULL; stemp = stemp->next) {
 236                 if (!strcasecmp(stemp->s_name, config.c_nodename)) {
 237                         time(&stemp->s_lastcontact);
 238                         strcpy(stemp->s_type, "bin");
 239                         strcpy(stemp->s_humannode, config.c_humannode);
 240                         strcpy(stemp->s_phonenum, config.c_phonenum);
 241                 }
 242                 /* remove systems we haven't heard from in a while */
 243                 if ((stemp->s_lastcontact == 0L)
 244                     || (now - stemp->s_lastcontact < EXPIRY_TIME)) {
 245                         fprintf(newfp, "%s\n%s %s\n",
 246                          stemp->s_name, stemp->s_type, stemp->s_nexthop);
 247                         if (strlen(stemp->s_phonenum) > 0)
 248                                 fprintf(newfp, "phonenum %s\n", stemp->s_phonenum);
 249                         if (strlen(stemp->s_gdom) > 0)
 250                                 fprintf(newfp, "gdom %s\n", stemp->s_gdom);
 251                         if (strlen(stemp->s_humannode) > 0)
 252                                 fprintf(newfp, "humannode %s\n", stemp->s_humannode);
 253                         if (stemp->s_lastcontact > 0L)
 254                                 fprintf(newfp, "lastcontact %ld %s",
 255                                         (long) stemp->s_lastcontact,
 256                                         asctime(localtime(&stemp->s_lastcontact)));
 257                         fprintf(newfp, "\n");
 258                 }
 259         }
 260         fclose(newfp);
 261         /* now free the list */
 262         while (slist != NULL) {
 263                 stemp = slist;
 264                 slist = slist->next;
 265                 free(stemp);
 266         }
 267 }
 268
 269
 270 /* call this function with the node name of a system and it returns a pointer
 271  * to its syslist structure.
 272  */
 273 struct syslist *get_sys_ptr(char *sysname)
 274 {
 275         static char sysnambuf[16];
 276         static struct syslist *sysptrbuf = NULL;
 277         struct syslist *stemp;
 278
 279         if ((!strcmp(sysname, sysnambuf))
 280             && (sysptrbuf != NULL))
 281                 return (sysptrbuf);
 282
 283         strcpy(sysnambuf, sysname);
 284         for (stemp = slist; stemp != NULL; stemp = stemp->next) {
 285                 if (!strcmp(sysname, stemp->s_name)) {
 286                         sysptrbuf = stemp;
 287                         return (stemp);
 288                 }
 289         }
 290         sysptrbuf = NULL;
 291         return (NULL);
 292 }
 293
 294
 295 /*
 296  * make sure only one copy of netproc runs at a time, using lock files
 297  */
 298 int set_lockfile(void)
 299 {
 300         FILE *lfp;
 301         int onppid;
 302
 303         if ((lfp = fopen(LOCKFILE, "r")) != NULL) {
 304                 fscanf(lfp, "%d", &onppid);
 305                 fclose(lfp);
 306                 if (!kill(onppid, 0) || errno == EPERM)
 307                         return 1;
 308         }
 309         lfp = fopen(LOCKFILE, "w");
 310         fprintf(lfp, "%ld\n", (long) getpid());
 311         fclose(lfp);
 312         return (0);
 313 }
 314
 315 void remove_lockfile(void)
 316 {
 317         unlink(LOCKFILE);
 318 }
 319
 320 /*
 321  * Why both cleanup() and nq_cleanup() ?  Notice the alarm() call in
 322  * cleanup() .  If for some reason netproc hangs waiting for the server
 323  * to clean up, the alarm clock goes off and the program exits anyway.
 324  * The cleanup() routine makes a check to ensure it's not reentering, in
 325  * case the ipc module looped it somehow.
 326  */
 327 void nq_cleanup(int e)
 328 {
 329         remove_lockfile();
 330         closelog();
 331         exit(e);
 332 }
 333
 334 void cleanup(int e)
 335 {
 336         static int nested = 0;
 337
 338         alarm(30);
 339         signal(SIGALRM, nq_cleanup);
 340         if (nested++ < 1)
 341                 serv_puts("QUIT");
 342         nq_cleanup(e);
 343 }
 344
 345 /*
 346  * This is implemented as a function rather than as a macro because the
 347  * client-side IPC modules expect logoff() to be defined.  They call logoff()
 348  * when a problem connecting or staying connected to the server occurs.
 349  */
 350 void logoff(int e)
 351 {
 352         cleanup(e);
 353 }
 354
 355 /*
 356  * If there is a kill file in place, this function will process it.
 357  */
 358 void load_filterlist(void)
 359 {
 360         FILE *fp;
 361         struct filterlist *fbuf;
 362         char sbuf[256];
 363         int a, p;
 364         fp = fopen("./network/filterlist", "r");
 365         if (fp == NULL)
 366                 return;
 367         while (fgets(sbuf, 256, fp) != NULL) {
 368                 if (sbuf[0] != '#') {
 369                         sbuf[strlen(sbuf) - 1] = 0;
 370                         fbuf = (struct filterlist *)
 371                             malloc((long) sizeof(struct filterlist));
 372                         fbuf->next = filter;
 373                         filter = fbuf;
 374                         strcpy(fbuf->f_person, "*");
 375                         strcpy(fbuf->f_room, "*");
 376                         strcpy(fbuf->f_system, "*");
 377                         p = (-1);
 378                         for (a = strlen(sbuf); a >= 0; --a)
 379                                 if (sbuf[a] == ',')
 380                                         p = a;
 381                         if (p >= 0) {
 382                                 sbuf[p] = 0;
 383                                 strcpy(fbuf->f_person, sbuf);
 384                                 strcpy(sbuf, &sbuf[p + 1]);
 385                         }
 386                         for (a = strlen(sbuf); a >= 0; --a)
 387                                 if (sbuf[a] == ',')
 388                                         p = a;
 389                         if (p >= 0) {
 390                                 sbuf[p] = 0;
 391                                 strcpy(fbuf->f_room, sbuf);
 392                                 strcpy(sbuf, &sbuf[p + 1]);
 393                         }
 394                         strcpy(fbuf->f_system, sbuf);
 395                 }
 396         }
 397         fclose(fp);
 398 }
 399
 400 /* returns 1 if user/message/room combination is in the kill file */
 401 int is_banned(char *k_person, char *k_room, char *k_system)
 402 {
 403         struct filterlist *fptr;
 404
 405         for (fptr = filter; fptr != NULL; fptr = fptr->next)
 406                 if (
 407                            ((!strcasecmp(fptr->f_person, k_person)) || (!strcmp(fptr->f_person, "*")))
 408                            &&
 409                            ((!strcasecmp(fptr->f_room, k_room)) || (!strcmp(fptr->f_room, "*")))
 410                            &&
 411                            ((!strcasecmp(fptr->f_system, k_system)) || (!strcmp(fptr->f_system, "*")))
 412                     )
 413                         return (1);
 414
 415         return (0);
 416 }
 417
 418 /*
 419  * Determine routing from sysinfo file
 420  */
 421 int get_sysinfo_type(char *name) {
 422         struct syslist *stemp;
 423
 424 GETSN:  for (stemp = slist; stemp != NULL; stemp = stemp->next) {
 425                 if (!strcasecmp(stemp->s_name, name)) {
 426                         if (!strcasecmp(stemp->s_type, "use")) {
 427                                 strcpy(name, stemp->s_nexthop);
 428                                 goto GETSN;
 429                         }
 430                         if (!strcasecmp(stemp->s_type, "bin")) {
 431                                 return (MES_BINARY);
 432                         }
 433                         if (!strcasecmp(stemp->s_type, "uum")) {
 434                                 return (MES_INTERNET);
 435                         }
 436                 }
 437         }
 438         syslog(LOG_ERR, "cannot find system '%s' in mail.sysinfo", name);
 439         return (-1);
 440 }
 441
 442
 443 void fpgetfield(FILE * fp, char *string)
 444 {
 445         int a, b;
 446
 447         strcpy(string, "");
 448         a = 0;
 449         do {
 450                 b = getc(fp);
 451                 if (b < 1) {
 452                         string[a] = 0;
 453                         return;
 454                 }
 455                 string[a] = b;
 456                 ++a;
 457         } while (b != 0);
 458 }
 459
 460
 461
 462 /*
 463  * Load all of the fields of a message, except the actual text, into a
 464  * table in memory (so we know how to process the message).
 465  */
 466 void msgfind(char *msgfile, struct minfo *buffer)
 467 {
 468         int b, e, mtype, aflag;
 469         char bbb[1024];
 470         char userid[1024];
 471         FILE *fp;
 472
 473         strcpy(userid, "");
 474         fp = fopen(msgfile, "rb");
 475         if (fp == NULL) {
 476                 syslog(LOG_ERR, "can't open message file: %s", strerror(errno));
 477                 return;
 478         }
 479         e = getc(fp);
 480         if (e != 255) {
 481                 syslog(LOG_ERR, "incorrect message format");
 482                 goto END;
 483         }
 484         mtype = getc(fp);
 485         aflag = getc(fp);
 486         buffer->I = 0L;
 487         buffer->R[0] = 0;
 488         buffer->E[0] = 0;
 489         buffer->H[0] = 0;
 490         buffer->S[0] = 0;
 491         buffer->B[0] = 0;
 492         buffer->G[0] = 0;
 493
 494 BONFGM: b = getc(fp);
 495         if (b < 0)
 496                 goto END;
 497         if (b == 'M')
 498                 goto END;
 499         fpgetfield(fp, bbb);
 500         while ((bbb[0] == ' ') && (strlen(bbb) > 1))
 501                 strcpy(bbb, &bbb[1]);
 502         if (b == 'A') {
 503                 strcpy(buffer->A, bbb);
 504                 if (strlen(userid) == 0) {
 505                         strcpy(userid, bbb);
 506                         for (e = 0; e < strlen(userid); ++e)
 507                                 if (userid[e] == ' ')
 508                                         userid[e] = '_';
 509                 }
 510         }
 511         if (b == 'O')
 512                 strcpy(buffer->O, bbb);
 513         if (b == 'C')
 514                 strcpy(buffer->C, bbb);
 515         if (b == 'N')
 516                 strcpy(buffer->N, bbb);
 517         if (b == 'S')
 518                 strcpy(buffer->S, bbb);
 519         if (b == 'P') {
 520                 /* extract the user id from the path */
 521                 for (e = 0; e < strlen(bbb); ++e)
 522                         if (bbb[e] == '!')
 523                                 strcpy(userid, &bbb[e + 1]);
 524
 525                 /* now find the next hop */
 526                 for (e = 0; e < strlen(bbb); ++e)
 527                         if (bbb[e] == '!')
 528                                 bbb[e] = 0;
 529                 strcpy(buffer->nexthop, bbb);
 530         }
 531         if (b == 'R') {
 532                 for (e = 0; e < strlen(bbb); ++e)
 533                         if (bbb[e] == '_')
 534                                 bbb[e] = ' ';
 535                 strcpy(buffer->R, bbb);
 536         }
 537         if (b == 'D')
 538                 strcpy(buffer->D, bbb);
 539         if (b == 'T')
 540                 buffer->T = atol(bbb);
 541         if (b == 'I')
 542                 buffer->I = atol(bbb);
 543         if (b == 'H')
 544                 strcpy(buffer->H, bbb);
 545         if (b == 'B')
 546                 strcpy(buffer->B, bbb);
 547         if (b == 'G')
 548                 strcpy(buffer->G, bbb);
 549         if (b == 'E')
 550                 strcpy(buffer->E, bbb);
 551         goto BONFGM;
 552
 553 END:    fclose(fp);
 554
 555         /* NOTE: we used to use the following two lines of code to assign
 556          * the timestamp as a message-ID if there was no message-ID already
 557          * in the message.  We don't do this anymore because it screws up
 558          * the loopzapper.
 559          *
 560         if (buffer->I == 0L)
 561                 buffer->I = buffer->T;
 562          */
 563 }
 564
 565
 566
 567
 568
 569 void ship_to(char *filenm, char *sysnm)
 570 {                               /* send spool file filenm to system sysnm */
 571         char sysflnm[100];
 572         char commbuf1[100];
 573         char commbuf2[100];
 574         FILE *sysflfd;
 575
 576 #ifdef DEBUG
 577         syslog(LOG_NOTICE, "shipping %s to %s", filenm, sysnm);
 578 #endif
 579         sprintf(sysflnm, "./network/systems/%s", sysnm);
 580         sysflfd = fopen(sysflnm, "r");
 581         if (sysflfd == NULL)
 582                 syslog(LOG_ERR, "cannot open %s", sysflnm);
 583         fgets(commbuf1, 99, sysflfd);
 584         commbuf1[strlen(commbuf1) - 1] = 0;
 585         fclose(sysflfd);
 586         sprintf(commbuf2, commbuf1, filenm);
 587         system(commbuf2);
 588 }
 589
 590 /*
 591  * proc_file_transfer()  -  handle a simple file transfer packet
 592  *
 593  */
 594 void proc_file_transfer(char *tname)
 595 {                               /* name of temp file containing the whole message */
 596         char buf[256];
 597         char dest_room[ROOMNAMELEN];
 598         char subdir_name[256];
 599         FILE *tfp, *uud;
 600         int a;
 601
 602         syslog(LOG_NOTICE, "processing network file transfer...");
 603
 604         tfp = fopen(tname, "rb");
 605         if (tfp == NULL)
 606                 syslog(LOG_ERR, "cannot open %s", tname);
 607         getc(tfp);
 608         getc(tfp);
 609         getc(tfp);
 610         do {
 611                 a = getc(tfp);
 612                 if (a != 'M') {
 613                         fpgetfield(tfp, buf);
 614                         if (a == 'O') {
 615                                 strcpy(dest_room, buf);
 616                         }
 617                 }
 618         } while ((a != 'M') && (a >= 0));
 619         if (a != 'M') {
 620                 fclose(tfp);
 621                 syslog(LOG_ERR, "no message text for file transfer");
 622                 return;
 623         }
 624         strcpy(subdir_name, "---xxx---");
 625         sprintf(buf, "GOTO %s", dest_room);
 626         serv_puts(buf);
 627         serv_gets(buf);
 628         if (buf[0] == '2') {
 629                 extract(subdir_name, &buf[4], 2);
 630                 if (strlen(subdir_name) == 0)
 631                         strcpy(subdir_name, "--xxx--");
 632         }
 633         /* Change to the room's directory; if that fails, change to the
 634          * bitbucket directory.  Then run uudecode.
 635          */
 636         sprintf(buf, "(cd %s/files/%s || cd %s/files/%s ) ; exec %s",
 637                 bbs_home_directory, subdir_name,
 638                 bbs_home_directory, config.c_bucket_dir,
 639                 UUDECODE);
 640
 641         uud = (FILE *) popen(buf, "w");
 642         if (uud == NULL) {
 643                 syslog(LOG_ERR, "cannot open uudecode pipe");
 644                 fclose(tfp);
 645                 return;
 646         }
 647         fgets(buf, 128, tfp);
 648         buf[strlen(buf) - 1] = 0;
 649         for (a = 0; a < strlen(buf); ++a)
 650                 if (buf[a] == '/')
 651                         buf[a] = '_';
 652         fprintf(uud, "%s\n", buf);
 653         printf("netproc: %s\n", buf);
 654         while (a = getc(tfp), a > 0)
 655                 putc(a, uud);
 656         fclose(tfp);
 657         pclose(uud);
 658         return;
 659 }
 660
 661
 662 /* send a bounce message */
 663 void bounce(struct minfo *bminfo)
 664 {
 665
 666         FILE *bounce;
 667         char bfilename[64];
 668         static int bseq = 1;
 669         time_t now;
 670
 671         sprintf(bfilename, "./network/spoolin/bounce.%ld.%d", (long) getpid(),
 672                 bseq++);
 673         bounce = fopen(bfilename, "wb");
 674         time(&now);
 675
 676         fprintf(bounce, "%c%c%c", 0xFF, MES_NORMAL, 0);
 677         fprintf(bounce, "Ppostmaster%c", 0);
 678         fprintf(bounce, "T%ld%c", (long) now, 0);
 679         fprintf(bounce, "APostmaster%c", 0);
 680         fprintf(bounce, "OMail%c", 0);
 681         fprintf(bounce, "N%s%c", config.c_nodename, 0);
 682         fprintf(bounce, "H%s%c", config.c_humannode, 0);
 683
 684         if (strlen(bminfo->E) > 0) {
 685                 fprintf(bounce, "R%s%c", bminfo->E, 0);
 686         } else {
 687                 fprintf(bounce, "R%s%c", bminfo->A, 0);
 688         }
 689
 690         fprintf(bounce, "D%s%c", bminfo->N, 0);
 691         fprintf(bounce, "M%s could not deliver your mail to:\n",
 692                 config.c_humannode);
 693         fprintf(bounce, " \n %s\n \n", bminfo->R);
 694         fprintf(bounce, " because there is no such user on this system.\n");
 695         fprintf(bounce, " (Unsent message does *not* follow.  ");
 696         fprintf(bounce, "Help to conserve bandwidth.)\n%c", 0);
 697         fclose(bounce);
 698 }
 699
 700
 701
 702
 703 /*
 704  * Generate a Message-ID string for the use table
 705  */
 706 void strmsgid(char *buf, struct minfo *msginfo) {
 707         int i;
 708
 709         sprintf(buf, "%ld@%s", msginfo->I, msginfo->N);
 710         for (i=0; i<strlen(buf); ++i) {
 711                 if (isspace(buf[i])) {
 712                         strcpy(&buf[i], &buf[i+1]);
 713                 }
 714                 buf[i] = tolower(buf[i]);
 715         }
 716 }
 717
 718
 719
 720 /*
 721  * Check the use table to see if a message has been here before.
 722  * Returns 1 if the message is a duplicate; otherwise, it returns
 723  * 0 and the message ID is added to the use table.
 724  */
 725 int already_received(GDBM_FILE ut, struct minfo *msginfo) {
 726         char buf[256];
 727         time_t now;
 728         datum mkey, newrec;
 729         int retval = 0;
 730
 731         /* We can't check for dups on a zero msgid, so just pass them through */
 732         if ((msginfo->I)==0L) {
 733                 return 0;
 734         }
 735
 736         strmsgid(buf, msginfo);
 737         now = time(NULL);
 738
 739         mkey.dptr = buf;
 740         mkey.dsize = strlen(buf);
 741
 742         /* Set return value to 1 if message exists */
 743         if (gdbm_exists(ut, mkey)) {
 744                 retval = 1;
 745         }
 746
 747         /* Write a record into the use table for this message.
 748          * Replace existing records; this keeps the timestamp fresh.
 749          */
 750         newrec.dptr = (char *)&now;
 751         newrec.dsize = sizeof(now);
 752         gdbm_store(ut, mkey, newrec, GDBM_REPLACE);
 753
 754         return(retval);
 755 }
 756
 757
 758
 759 /*
 760  * Purge any old entries out of the use table.
 761  *
 762  * Yes, you're reading this correctly: it keeps traversing the table until
 763  * it manages to do a complete pass without deleting any records.  Read the
 764  * gdbm man page to find out why.
 765  *
 766  */
 767 void purge_use_table(GDBM_FILE ut) {
 768         datum mkey, nextkey, therec;
 769         int purged_anything = 0;
 770         time_t rec_timestamp, now;
 771
 772         now = time(NULL);
 773
 774         do {
 775                 purged_anything = 0;
 776                 mkey = gdbm_firstkey(ut);
 777                 while (mkey.dptr != NULL) {
 778                         therec = gdbm_fetch(ut, mkey);
 779                         if (therec.dptr != NULL) {
 780                                 memcpy(&rec_timestamp, therec.dptr,
 781                                         sizeof(time_t));
 782                                 free(therec.dptr);
 783
 784                                 if ((now - rec_timestamp) > USE_TIME) {
 785                                         gdbm_delete(ut, mkey);
 786                                         purged_anything = 1;
 787                                 }
 788
 789                         }
 790                         nextkey = gdbm_nextkey(ut, mkey);
 791                         free(mkey.dptr);
 792                         mkey = nextkey;
 793                 }
 794         } while (purged_anything != 0);
 795 }
 796
 797
 798
 799 /*
 800  * process incoming files in ./network/spoolin
 801  */
 802 void inprocess(void)
 803 {
 804         FILE *fp, *message, *testfp, *ls, *duplist;
 805         static struct minfo minfo;
 806         struct recentmsg recentmsg;
 807         char tname[128], aaa[1024], iname[256], sfilename[256], pfilename[256];
 808         int a, b;
 809         int FieldID;
 810         struct syslist *stemp;
 811         char *ptr = NULL;
 812         char buf[256];
 813         long msglen;
 814         int bloklen;
 815         GDBM_FILE use_table;
 816
 817         /* temp file names */
 818         sprintf(tname, tmpnam(NULL));
 819         sprintf(iname, tmpnam(NULL));
 820
 821         load_filterlist();
 822
 823         /* Make sure we're in the right directory */
 824         chdir(bbs_home_directory);
 825
 826         /* Open the use table */
 827         use_table = gdbm_open("./data/usetable.gdbm", 512,
 828                               GDBM_WRCREAT, 0600, 0);
 829         if (use_table == NULL) {
 830                 syslog(LOG_ERR, "could not open use table: %s",
 831                        strerror(errno));
 832         }
 833
 834
 835         /* temporary file to contain a log of rejected dups */
 836         duplist = tmpfile();
 837
 838         /* Let the shell do the dirty work. Get all data from spoolin */
 839         do {
 840                 sprintf(aaa, "cd %s/network/spoolin; ls", bbs_home_directory);
 841                 ls = popen(aaa, "r");
 842                 if (ls == NULL) {
 843                         syslog(LOG_ERR, "could not open dir cmd: %s", strerror(errno));
 844                 }
 845                 if (ls != NULL) {
 846                         do {
 847 SKIP:                           ptr = fgets(sfilename, sizeof sfilename, ls);
 848                                 if (ptr != NULL) {
 849                                         sfilename[strlen(sfilename) - 1] = 0;
 850                                         if (!strcmp(sfilename, ".")) goto SKIP;
 851                                         if (!strcmp(sfilename, "..")) goto SKIP;
 852                                         if (!strcmp(sfilename, "CVS")) goto SKIP;
 853                                         goto PROCESS_IT;
 854                                 }
 855                         } while (ptr != NULL);
 856 PROCESS_IT:             pclose(ls);
 857                 }
 858                 if (ptr != NULL) {
 859                         sprintf(pfilename, "%s/network/spoolin/%s", bbs_home_directory, sfilename);
 860                         syslog(LOG_NOTICE, "processing <%s>", pfilename);
 861
 862                         fp = fopen(pfilename, "rb");
 863                         if (fp == NULL) {
 864                                 syslog(LOG_ERR, "cannot open %s: %s", pfilename, strerror(errno));
 865                                 fp = fopen("/dev/null", "rb");
 866                         }
 867 NXMSG:  /* Seek to the beginning of the next message */
 868                         do {
 869                                 a = getc(fp);
 870                         } while ((a != 255) && (a >= 0));
 871                         if (a < 0)
 872                                 goto ENDSTR;
 873
 874                         /* This crates the temporary file. */
 875                         message = fopen(tname, "wb");
 876                         if (message == NULL) {
 877                                 syslog(LOG_ERR, "error creating %s: %s",
 878                                         tname, strerror(errno));
 879                                 goto ENDSTR;
 880                         }
 881                         putc(255, message);     /* 0xFF (start-of-message) */
 882                         a = getc(fp);
 883                         putc(a, message);       /* type */
 884                         a = getc(fp);
 885                         putc(a, message);       /* mode */
 886                         do {
 887                                 FieldID = getc(fp);     /* Header field ID */
 888                                 putc(FieldID, message);
 889                                 do {
 890                                         a = getc(fp);
 891                                         putc(a, message);
 892                                 } while (a > 0);
 893                         } while ((FieldID != 'M') && (a >= 0));
 894                         /* M is always last */
 895
 896                         msglen = ftell(message);
 897                         fclose(message);
 898
 899                         /* process the individual mesage */
 900                         minfo.D[0] = 0;
 901                         minfo.C[0] = 0;
 902                         minfo.B[0] = 0;
 903                         minfo.G[0] = 0;
 904                         minfo.R[0] = 0;
 905                         msgfind(tname, &minfo);
 906                         strncpy(recentmsg.RMnodename, minfo.N, 9);
 907                         recentmsg.RMnodename[9] = 0;
 908                         recentmsg.RMnum = minfo.I;
 909                         syslog(LOG_NOTICE, "#%ld fm <%s> in <%s> @ <%s>",
 910                                minfo.I, minfo.A, minfo.O, minfo.N);
 911                         if (strlen(minfo.R) > 0) {
 912                                 syslog(LOG_NOTICE, "     to <%s>", minfo.R);
 913                                 if (strlen(minfo.D) > 0) {
 914                                         syslog(LOG_NOTICE, "     @ <%s>",
 915                                                 minfo.D);
 916                                 }
 917                         }
 918                         if (!strcasecmp(minfo.D, FQDN))
 919                                 strcpy(minfo.D, NODENAME);
 920
 921 /* this routine updates our info on the system that sent the message */
 922                         stemp = get_sys_ptr(minfo.N);
 923                         if ((stemp == NULL) && (get_sys_ptr(minfo.nexthop) != NULL)) {
 924                                 /* add non-neighbor system to map */
 925                                 syslog(LOG_NOTICE, "Adding non-neighbor system <%s> to map",
 926                                        slist->s_name);
 927                                 stemp = (struct syslist *) malloc((long) sizeof(struct syslist));
 928                                 stemp->next = slist;
 929                                 slist = stemp;
 930                                 strcpy(slist->s_name, minfo.N);
 931                                 strcpy(slist->s_type, "use");
 932                                 strcpy(slist->s_nexthop, minfo.nexthop);
 933                                 time(&slist->s_lastcontact);
 934                         } else if ((stemp == NULL) && (!strcasecmp(minfo.N, minfo.nexthop))) {
 935                                 /* add neighbor system to map */
 936                                 syslog(LOG_NOTICE, "Adding neighbor system <%s> to map",
 937                                        slist->s_name);
 938                                 sprintf(aaa, "%s/network/systems/%s", bbs_home_directory, minfo.N);
 939                                 testfp = fopen(aaa, "r");
 940                                 if (testfp != NULL) {
 941                                         fclose(testfp);
 942                                         stemp = (struct syslist *)
 943                                             malloc((long) sizeof(struct syslist));
 944                                         stemp->next = slist;
 945                                         slist = stemp;
 946                                         strcpy(slist->s_name, minfo.N);
 947                                         strcpy(slist->s_type, "bin");
 948                                         strcpy(slist->s_nexthop, "Mail");
 949                                         time(&slist->s_lastcontact);
 950                                 }
 951                         }
 952                         /* now update last contact and long node name if we can */
 953                         if (stemp != NULL) {
 954                                 time(&stemp->s_lastcontact);
 955                                 if (strlen(minfo.H) > 0)
 956                                         strcpy(stemp->s_humannode, minfo.H);
 957                                 if (strlen(minfo.B) > 0)
 958                                         strcpy(stemp->s_phonenum, minfo.B);
 959                                 if (strlen(minfo.G) > 0)
 960                                         strcpy(stemp->s_gdom, minfo.G);
 961                         }
 962
 963                         /* Check the use table; reject message if it's been here before */
 964                         if (already_received(use_table, &minfo)) {
 965                                 syslog(LOG_NOTICE, "rejected duplicate message");
 966                                 fprintf(duplist, "#%ld fm <%s> in <%s> @ <%s>\n",
 967                                         minfo.I, minfo.A, minfo.O, minfo.N);
 968                         }
 969
 970
 971                         /* route the message if necessary */
 972                         else if ((strcasecmp(minfo.D, NODENAME)) && (minfo.D[0] != 0)) {
 973                                 a = get_sysinfo_type(minfo.D);
 974                                 syslog(LOG_NOTICE, "routing message to system <%s>", minfo.D);
 975                                 fflush(stdout);
 976                                 if (a == MES_INTERNET) {
 977                                         if (fork() == 0) {
 978                                                 syslog(LOG_NOTICE, "netmailer %s", tname);
 979                                                 fflush(stdout);
 980                                                 execlp("./netmailer", "netmailer",
 981                                                        tname, NULL);
 982                                                 syslog(LOG_ERR, "error running netmailer: %s",
 983                                                        strerror(errno));
 984                                                 exit(errno);
 985                                         } else
 986                                                 while (wait(&b) != (-1));
 987                                 } else if (a == MES_BINARY) {
 988                                         ship_to(tname, minfo.D);
 989                                 } else {
 990                                         /* message falls into the bit bucket? */
 991                                 }
 992                         }
 993
 994                         /* check to see if it's a file transfer */
 995                         else if (!strncasecmp(minfo.S, "FILE", 4)) {
 996                                 proc_file_transfer(tname);
 997                         }
 998
 999                         /* otherwise process it as a normal message */
1000                         else {
1001
1002                                 if (!strcasecmp(minfo.R, "postmaster")) {
1003                                         strcpy(minfo.R, "");
1004                                         strcpy(minfo.C, "Aide");
1005                                 }
1006                                 if (strlen(minfo.R) > 0) {
1007                                         sprintf(buf, "GOTO _MAIL_");
1008                                 }
1009                                 if (is_banned(minfo.A, minfo.C, minfo.N)) {
1010                                         sprintf(buf, "GOTO %s", FILTERROOM);
1011                                 } else {
1012                                         if (strlen(minfo.C) > 0) {
1013                                                 sprintf(buf, "GOTO %s", minfo.C);
1014                                         } else {
1015                                                 sprintf(buf, "GOTO %s", minfo.O);
1016                                         }
1017                                 }
1018                                 serv_puts(buf);
1019                                 serv_gets(buf);
1020                                 if (buf[0] != '2') {
1021                                         syslog(LOG_ERR, "%s", buf);
1022                                         sprintf(buf, "GOTO _BITBUCKET_");
1023                                         serv_puts(buf);
1024                                         serv_gets(buf);
1025                                 }
1026                                 /* Open the temporary file containing the message */
1027                                 message = fopen(tname, "rb");
1028                                 if (message == NULL) {
1029                                         syslog(LOG_ERR, "cannot open %s: %s",
1030                                                tname, strerror(errno));
1031                                         unlink(tname);
1032                                         goto NXMSG;
1033                                 }
1034                                 /* Transmit the message to the server */
1035                                 sprintf(buf, "ENT3 1|%s|%ld", minfo.R, msglen);
1036                                 serv_puts(buf);
1037                                 serv_gets(buf);
1038                                 if (!strncmp(buf, "570", 3)) {
1039                                         /* no such user, do a bounce */
1040                                         bounce(&minfo);
1041                                 }
1042                                 if (buf[0] == '7') {
1043                                         /* Always use the server's idea of the message length,
1044                                          * even though they should both be identical */
1045                                         msglen = atol(&buf[4]);
1046                                         while (msglen > 0L) {
1047                                                 bloklen = ((msglen >= 255L) ? 255 : ((int) msglen));
1048                                                 if (fread(buf, bloklen, 1, message) < 1) {
1049                                                         syslog(LOG_ERR,
1050                                                                "error trying to read %d bytes: %s",
1051                                                                bloklen, strerror(errno));
1052                                                 }
1053                                                 serv_write(buf, bloklen);
1054                                                 msglen = msglen - (long) bloklen;
1055                                         }
1056                                         serv_puts("NOOP");
1057                                         serv_gets(buf);
1058                                 } else {
1059                                         syslog(LOG_ERR, "%s", buf);
1060                                 }
1061
1062                                 fclose(message);
1063                         }
1064
1065                         unlink(tname);
1066                         goto NXMSG;
1067
1068 ENDSTR:                 fclose(fp);
1069                         unlink(pfilename);
1070                 }
1071         } while (ptr != NULL);
1072         unlink(iname);
1073
1074         purge_use_table(use_table);
1075         gdbm_close(use_table);
1076
1077
1078         /*
1079          * If dups were rejected, post a message saying so
1080          */
1081         if (ftell(duplist)!=0L) {
1082                 fp = fopen("./network/spoolin/ctdl_rejects", "ab");
1083                 if (fp != NULL) {
1084                         fprintf(fp, "%cA%c", 255, 1);
1085                         fprintf(fp, "T%ld%c", time(NULL), 0);
1086                         fprintf(fp, "ACitadel%c", 0);
1087                         fprintf(fp, "OAide%cM", 0);
1088                         fprintf(fp, "The following duplicate messages"
1089                                 " were rejected:\n \n");
1090                         rewind(duplist);
1091                         while (fgets(buf, sizeof(buf), duplist) != NULL) {
1092                                 buf[strlen(buf)-1] = 0;
1093                                 fprintf(fp, " %s\n", buf);
1094                         }
1095                         fprintf(fp, "%c", 0);
1096                         pclose(fp);
1097                 }
1098         }
1099
1100         fclose(duplist);
1101
1102 }
1103
1104
1105 /* Checks to see whether its ok to send */
1106 /* Returns 1 for ok, send message       */
1107 /* Returns 0 if message already there   */
1108 int checkpath(char *path, char *sys)
1109 {
1110         int a;
1111         char sys2[512];
1112         strcpy(sys2, sys);
1113         strcat(sys2, "!");
1114
1115 #ifdef DEBUG
1116         syslog(LOG_NOTICE, "checkpath <%s> <%s> ... ", path, sys);
1117 #endif
1118         for (a = 0; a < strlen(path); ++a) {
1119                 if (!strncmp(&path[a], sys2, strlen(sys2)))
1120                         return (0);
1121         }
1122         return (1);
1123 }
1124
1125 /*
1126  * implement split horizon algorithm
1127  */
1128 int ismsgok(long int mpos, FILE * mmfp, char *sysname)
1129 {
1130         int a;
1131         int ok = 0;             /* fail safe - no path, don't send it */
1132         char fbuf[256];
1133
1134         fseek(mmfp, mpos, 0);
1135         if (getc(mmfp) != 255)
1136                 return (0);
1137         getc(mmfp);
1138         getc(mmfp);
1139
1140         while (a = getc(mmfp), ((a != 'M') && (a != 0))) {
1141                 fpgetfield(mmfp, fbuf);
1142                 if (a == 'P') {
1143                         ok = checkpath(fbuf, sysname);
1144                 }
1145         }
1146 #ifdef DEBUG
1147         syslog(LOG_NOTICE, "%s", ((ok) ? "SEND" : "(no)"));
1148 #endif
1149         return (ok);
1150 }
1151
1152
1153
1154 /* spool list of messages to a file */
1155 /* returns # of msgs spooled */
1156 int spool_out(struct msglist *cmlist, FILE * destfp, char *sysname)
1157 {
1158         struct msglist *cmptr;
1159         FILE *mmfp;
1160         char fbuf[128];
1161         int a;
1162         int msgs_spooled = 0;
1163         long msg_len;
1164         int blok_len;
1165
1166         char buf[256];
1167         char curr_rm[256];
1168
1169         strcpy(curr_rm, "");
1170
1171         /* for each message in the list... */
1172         for (cmptr = cmlist; cmptr != NULL; cmptr = cmptr->next) {
1173
1174                 /* make sure we're in the correct room... */
1175                 if (strcasecmp(curr_rm, cmptr->m_rmname)) {
1176                         sprintf(buf, "GOTO %s", cmptr->m_rmname);
1177                         serv_puts(buf);
1178                         serv_gets(buf);
1179                         if (buf[0] == '2') {
1180                                 strcpy(curr_rm, cmptr->m_rmname);
1181                         } else {
1182                                 syslog(LOG_ERR, "%s", buf);
1183                         }
1184                 }
1185                 /* download the message from the server... */
1186                 mmfp = tmpfile();
1187                 sprintf(buf, "MSG3 %ld", cmptr->m_num);
1188                 serv_puts(buf);
1189                 serv_gets(buf);
1190                 if (buf[0] == '6') {    /* read the msg */
1191                         msg_len = atol(&buf[4]);
1192                         while (msg_len > 0L) {
1193                                 blok_len = ((msg_len >= 256L) ? 256 : (int) msg_len);
1194                                 serv_read(buf, blok_len);
1195                                 fwrite(buf, blok_len, 1, mmfp);
1196                                 msg_len = msg_len - (long) blok_len;
1197                         }
1198                 } else {        /* or print the err */
1199                         syslog(LOG_ERR, "%s", buf);
1200                 }
1201
1202                 rewind(mmfp);
1203
1204                 if (ismsgok(0L, mmfp, sysname)) {
1205                         ++msgs_spooled;
1206                         fflush(stdout);
1207                         fseek(mmfp, 0L, 0);
1208                         fread(fbuf, 3, 1, mmfp);
1209                         fwrite(fbuf, 3, 1, destfp);
1210                         while (a = getc(mmfp), ((a != 0) && (a != 'M'))) {
1211                                 if (a != 'C')
1212                                         putc(a, destfp);
1213                                 fpgetfield(mmfp, fbuf);
1214                                 if (a == 'P')
1215                                         fprintf(destfp, "%s!", NODENAME);
1216                                 if (a != 'C')
1217                                         fwrite(fbuf, strlen(fbuf) + 1, 1, destfp);
1218                         }
1219                         if (a == 'M') {
1220                                 fprintf(destfp, "C%s%c",
1221                                         cmptr->m_rmname, 0);
1222                                 putc('M', destfp);
1223                                 do {
1224                                         a = getc(mmfp);
1225                                         putc(a, destfp);
1226                                 } while (a > 0);
1227                         }
1228                 }
1229                 fclose(mmfp);
1230         }
1231
1232         return (msgs_spooled);
1233 }
1234
1235 void outprocess(char *sysname)
1236 {                               /* send new room messages to sysname */
1237         char sysflnm[64];
1238         char srmname[32];
1239         char shiptocmd[128];
1240         char lbuf[64];
1241         char tempflnm[64];
1242         char buf[256];
1243         struct msglist *cmlist = NULL;
1244         struct rmlist *crmlist = NULL;
1245         struct rmlist *rmptr, *rmptr2;
1246         struct msglist *cmptr, *cmptr2;
1247         FILE *sysflfp, *tempflfp;
1248         int outgoing_msgs;
1249         long thismsg;
1250
1251         sprintf(tempflnm, tmpnam(NULL));
1252         tempflfp = fopen(tempflnm, "w");
1253         if (tempflfp == NULL)
1254                 return;
1255
1256
1257 /*
1258  * Read system file for node in question and put together room list
1259  */
1260         sprintf(sysflnm, "%s/network/systems/%s", bbs_home_directory, sysname);
1261         sysflfp = fopen(sysflnm, "r");
1262         if (sysflfp == NULL)
1263                 return;
1264         fgets(shiptocmd, 128, sysflfp);
1265         shiptocmd[strlen(shiptocmd) - 1] = 0;
1266         while (!feof(sysflfp)) {
1267                 if (fgets(srmname, 32, sysflfp) == NULL)
1268                         break;
1269                 srmname[strlen(srmname) - 1] = 0;
1270                 fgets(lbuf, 32, sysflfp);
1271                 rmptr = (struct rmlist *) malloc(sizeof(struct rmlist));
1272                 rmptr->next = NULL;
1273                 strcpy(rmptr->rm_name, srmname);
1274                 strip_trailing_whitespace(rmptr->rm_name);
1275                 rmptr->rm_lastsent = atol(lbuf);
1276                 if (crmlist == NULL)
1277                         crmlist = rmptr;
1278                 else if (!strcasecmp(rmptr->rm_name, "control")) {
1279                         /* control has to be first in room list */
1280                         rmptr->next = crmlist;
1281                         crmlist = rmptr;
1282                 } else {
1283                         rmptr2 = crmlist;
1284                         while (rmptr2->next != NULL)
1285                                 rmptr2 = rmptr2->next;
1286                         rmptr2->next = rmptr;
1287                 }
1288         }
1289         fclose(sysflfp);
1290
1291 /*
1292  * Assemble list of messages to be spooled
1293  */
1294         for (rmptr = crmlist; rmptr != NULL; rmptr = rmptr->next) {
1295
1296                 sprintf(buf, "GOTO %s", rmptr->rm_name);
1297                 serv_puts(buf);
1298                 serv_gets(buf);
1299                 if (buf[0] != '2') {
1300                         syslog(LOG_ERR, "%s", buf);
1301                 } else {
1302                         sprintf(buf, "MSGS GT|%ld", rmptr->rm_lastsent);
1303                         serv_puts(buf);
1304                         serv_gets(buf);
1305                         if (buf[0] == '1')
1306                                 while (serv_gets(buf), strcmp(buf, "000")) {
1307                                         thismsg = atol(buf);
1308                                         if (thismsg > (rmptr->rm_lastsent)) {
1309                                                 rmptr->rm_lastsent = thismsg;
1310
1311                                                 cmptr = (struct msglist *)
1312                                                     malloc(sizeof(struct msglist));
1313                                                 cmptr->next = NULL;
1314                                                 cmptr->m_num = thismsg;
1315                                                 strcpy(cmptr->m_rmname, rmptr->rm_name);
1316
1317                                                 if (cmlist == NULL)
1318                                                         cmlist = cmptr;
1319                                                 else {
1320                                                         cmptr2 = cmlist;
1321                                                         while (cmptr2->next != NULL)
1322                                                                 cmptr2 = cmptr2->next;
1323                                                         cmptr2->next = cmptr;
1324                                                 }
1325                                         }
1326                         } else {        /* print error from "msgs all" */
1327                                 syslog(LOG_ERR, "%s", buf);
1328                         }
1329                 }
1330         }
1331
1332         outgoing_msgs = 0;
1333         cmptr2 = cmlist;        /* this loop counts the messages */
1334         while (cmptr2 != NULL) {
1335                 ++outgoing_msgs;
1336                 cmptr2 = cmptr2->next;
1337         }
1338         syslog(LOG_NOTICE, "%d messages to be spooled to %s",
1339                outgoing_msgs, sysname);
1340
1341 /*
1342  * Spool out the messages, but only if there are any.
1343  */
1344         if (outgoing_msgs != 0)
1345                 outgoing_msgs = spool_out(cmlist, tempflfp, sysname);
1346         syslog(LOG_NOTICE, "%d messages actually spooled",
1347                outgoing_msgs);
1348
1349 /*
1350  * Deallocate list of spooled messages.
1351  */
1352         while (cmlist != NULL) {
1353                 cmptr = cmlist->next;
1354                 free(cmlist);
1355                 cmlist = cmptr;
1356         }
1357
1358 /*
1359  * Rewrite system file and deallocate room list.
1360  */
1361         syslog(LOG_NOTICE, "Spooling...");
1362         sysflfp = fopen(sysflnm, "w");
1363         fprintf(sysflfp, "%s\n", shiptocmd);
1364         for (rmptr = crmlist; rmptr != NULL; rmptr = rmptr->next)
1365                 fprintf(sysflfp, "%s\n%ld\n", rmptr->rm_name, rmptr->rm_lastsent);
1366         fclose(sysflfp);
1367         while (crmlist != NULL) {
1368                 rmptr = crmlist->next;
1369                 free(crmlist);
1370                 crmlist = rmptr;
1371         }
1372
1373 /*
1374  * Close temporary file, ship it out, and return
1375  */
1376         fclose(tempflfp);
1377         if (outgoing_msgs != 0)
1378                 ship_to(tempflnm, sysname);
1379         unlink(tempflnm);
1380 }
1381
1382
1383 /*
1384  * Connect netproc to the Citadel server running on this computer.
1385  */
1386 void np_attach_to_server(void)
1387 {
1388         char buf[256];
1389         char portname[8];
1390         char *args[] =
1391         {"netproc", "localhost", NULL, NULL};
1392
1393         syslog(LOG_NOTICE, "Attaching to server...");
1394         sprintf(portname, "%d", config.c_port_number);
1395         args[2] = portname;
1396         attach_to_server(3, args);
1397         serv_gets(buf);
1398         syslog(LOG_NOTICE, "%s", &buf[4]);
1399         sprintf(buf, "IPGM %d", config.c_ipgm_secret);
1400         serv_puts(buf);
1401         serv_gets(buf);
1402         syslog(LOG_NOTICE, "%s", &buf[4]);
1403         if (buf[0] != '2') {
1404                 cleanup(2);
1405         }
1406 }
1407
1408
1409
1410 /*
1411  * main
1412  */
1413 int main(int argc, char **argv)
1414 {
1415         char allst[32];
1416         FILE *allfp;
1417         int a;
1418         int import_only = 0;    /* if set to 1, don't export anything */
1419
1420         openlog("netproc", LOG_PID, LOG_USER);
1421         strcpy(bbs_home_directory, BBSDIR);
1422
1423         /*
1424          * Change directories if specified
1425          */
1426         for (a = 1; a < argc; ++a) {
1427                 if (!strncmp(argv[a], "-h", 2)) {
1428                         strcpy(bbs_home_directory, argv[a]);
1429                         strcpy(bbs_home_directory, &bbs_home_directory[2]);
1430                         home_specified = 1;
1431                 } else if (!strcmp(argv[a], "-i")) {
1432                         import_only = 1;
1433                 } else {
1434                         fprintf(stderr, "netproc: usage: ");
1435                         fprintf(stderr, "netproc [-hHomeDir] [-i]\n");
1436                         exit(1);
1437                 }
1438         }
1439
1440         get_config();
1441
1442         if (set_lockfile() != 0) {
1443                 syslog(LOG_NOTICE, "lock file exists: already running");
1444                 cleanup(1);
1445         }
1446         signal(SIGINT, cleanup);
1447         signal(SIGQUIT, cleanup);
1448         signal(SIGHUP, cleanup);
1449         signal(SIGTERM, cleanup);
1450
1451         syslog(LOG_NOTICE, "started.  pid=%d", getpid());
1452         fflush(stdout);
1453         np_attach_to_server();
1454         fflush(stdout);
1455
1456         if (load_syslist() != 0)
1457                 syslog(LOG_ERR, "cannot load sysinfo");
1458         setup_special_nodes();
1459
1460         inprocess();            /* first collect incoming stuff */
1461
1462         if (import_only != 1) {
1463                 allfp = (FILE *) popen("cd ./network/systems; ls", "r");
1464                 if (allfp != NULL) {
1465                         while (fgets(allst, 32, allfp) != NULL) {
1466                                 allst[strlen(allst) - 1] = 0;
1467                                 outprocess(allst);
1468                         }
1469                         pclose(allfp);
1470                 }
1471                 /* import again in case anything new was generated */
1472                 inprocess();
1473         }
1474         rewrite_syslist();
1475         syslog(LOG_NOTICE, "processing ended.");
1476         cleanup(0);
1477         return 0;
1478 }