citadel/serv_network.c

   1 /*
   2  * $Id$
   3  *
   4  * This module will eventually replace netproc and some of its utilities.  In
   5  * the meantime, it serves as a mailing list manager.
   6  *
   7  * Copyright (C) 2000-2001 by Art Cancro and others.
   8  * This code is released under the terms of the GNU General Public License.
   9  *
  10  */
  11
  12 #include "sysdep.h"
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <stdio.h>
  16 #include <fcntl.h>
  17 #include <signal.h>
  18 #include <pwd.h>
  19 #include <errno.h>
  20 #include <sys/types.h>
  21
  22 #if TIME_WITH_SYS_TIME
  23 # include <sys/time.h>
  24 # include <time.h>
  25 #else
  26 # if HAVE_SYS_TIME_H
  27 #  include <sys/time.h>
  28 # else
  29 #  include <time.h>
  30 # endif
  31 #endif
  32
  33 #include <sys/wait.h>
  34 #include <string.h>
  35 #include <limits.h>
  36 #include "citadel.h"
  37 #include "server.h"
  38 #include "sysdep_decls.h"
  39 #include "citserver.h"
  40 #include "support.h"
  41 #include "config.h"
  42 #include "dynloader.h"
  43 #include "room_ops.h"
  44 #include "user_ops.h"
  45 #include "policy.h"
  46 #include "database.h"
  47 #include "msgbase.h"
  48 #include "tools.h"
  49 #include "internet_addressing.h"
  50 #include "serv_network.h"
  51
  52
  53 /*
  54  * When we do network processing, it's accomplished in two passes; one to
  55  * gather a list of rooms and one to actually do them.  It's ok that rplist
  56  * is global; this process *only* runs as part of the housekeeping loop and
  57  * therefore only one will run at a time.
  58  */
  59 struct RoomProcList {
  60         struct RoomProcList *next;
  61         char name[ROOMNAMELEN];
  62 };
  63
  64 struct RoomProcList *rplist = NULL;
  65
  66
  67
  68
  69 void cmd_gnet(char *argbuf) {
  70         char filename[SIZ];
  71         char buf[SIZ];
  72         FILE *fp;
  73
  74         if (CtdlAccessCheck(ac_room_aide)) return;
  75         assoc_file_name(filename, &CC->quickroom, "netconfigs");
  76         cprintf("%d Network settings for room #%ld <%s>\n",
  77                 LISTING_FOLLOWS,
  78                 CC->quickroom.QRnumber, CC->quickroom.QRname);
  79
  80         fp = fopen(filename, "r");
  81         if (fp != NULL) {
  82                 while (fgets(buf, sizeof buf, fp) != NULL) {
  83                         buf[strlen(buf)-1] = 0;
  84                         cprintf("%s\n", buf);
  85                 }
  86                 fclose(fp);
  87         }
  88
  89         cprintf("000\n");
  90 }
  91
  92
  93 void cmd_snet(char *argbuf) {
  94         char tempfilename[SIZ];
  95         char filename[SIZ];
  96         char buf[SIZ];
  97         FILE *fp;
  98
  99         if (CtdlAccessCheck(ac_room_aide)) return;
 100         safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
 101         assoc_file_name(filename, &CC->quickroom, "netconfigs");
 102
 103         fp = fopen(tempfilename, "w");
 104         if (fp == NULL) {
 105                 cprintf("%d Cannot open %s: %s\n",
 106                         ERROR+INTERNAL_ERROR,
 107                         tempfilename,
 108                         strerror(errno));
 109         }
 110
 111         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 112         while (client_gets(buf), strcmp(buf, "000")) {
 113                 fprintf(fp, "%s\n", buf);
 114         }
 115         fclose(fp);
 116
 117         /* Now copy the temp file to its permanent location
 118          * (We use /bin/mv instead of link() because they may be on
 119          * different filesystems)
 120          */
 121         unlink(filename);
 122         snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
 123         system(buf);
 124 }
 125
 126
 127
 128 /*
 129  * Spools out one message from the list.
 130  */
 131 void network_spool_msg(long msgnum, void *userdata) {
 132         struct SpoolControl *sc;
 133         struct namelist *nptr;
 134         int err;
 135         char *instr = NULL;
 136         char *newpath = NULL;
 137         size_t instr_len = SIZ;
 138         struct CtdlMessage *msg;
 139         struct CtdlMessage *imsg;
 140         struct ser_ret sermsg;
 141         FILE *fp;
 142         char filename[SIZ];
 143
 144         sc = (struct SpoolControl *)userdata;
 145
 146         /*
 147          * Process mailing list recipients
 148          */
 149         if (sc->listrecps != NULL) {
 150
 151                 /* First, copy it to the spoolout room */
 152                 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
 153                 if (err != 0) return;
 154
 155                 /*
 156                  * Figure out how big a buffer we need to allocate
 157                  */
 158                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 159                         instr_len = instr_len + strlen(nptr->name);
 160                 }
 161
 162                 /*
 163                  * allocate...
 164                  */
 165                 lprintf(9, "Generating delivery instructions\n");
 166                 instr = mallok(instr_len);
 167                 if (instr == NULL) {
 168                         lprintf(1, "Cannot allocate %d bytes for instr...\n",
 169                                 instr_len);
 170                         abort();
 171                 }
 172                 sprintf(instr,
 173                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 174                         "bounceto|postmaster@%s\n" ,
 175                         SPOOLMIME, msgnum, time(NULL), config.c_fqdn );
 176
 177                 /* Generate delivery instructions for each recipient */
 178                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 179                         sprintf(&instr[strlen(instr)], "remote|%s|0||\n",
 180                                 nptr->name);
 181                 }
 182
 183                 /*
 184                  * Generate a message from the instructions
 185                  */
 186                 imsg = mallok(sizeof(struct CtdlMessage));
 187                 memset(imsg, 0, sizeof(struct CtdlMessage));
 188                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
 189                 imsg->cm_anon_type = MES_NORMAL;
 190                 imsg->cm_format_type = FMT_RFC822;
 191                 imsg->cm_fields['A'] = strdoop("Citadel");
 192                 imsg->cm_fields['M'] = instr;
 193
 194                 /* Save delivery instructions in spoolout room */
 195                 CtdlSaveMsg(imsg, "", SMTP_SPOOLOUT_ROOM, MES_LOCAL);
 196                 CtdlFreeMessage(imsg);
 197         }
 198
 199         /*
 200          * Process IGnet push shares
 201          */
 202         if (sc->ignet_push_shares != NULL) {
 203
 204                 msg = CtdlFetchMessage(msgnum);
 205                 if (msg != NULL) {
 206
 207                         /* Prepend our node name to the Path field whenever
 208                          * sending a message to another IGnet node
 209                          */
 210                         if (msg->cm_fields['P'] == NULL) {
 211                                 msg->cm_fields['P'] = strdoop("username");
 212                         }
 213                         newpath = mallok(strlen(msg->cm_fields['P']) +
 214                                         strlen(config.c_nodename) + 2);
 215                         sprintf(newpath, "%s!%s", config.c_nodename,
 216                                         msg->cm_fields['P']);
 217                         phree(msg->cm_fields['P']);
 218                         msg->cm_fields['P'] = newpath;
 219
 220                         /*
 221                          * Force the message to appear in the correct room
 222                          * on the far end by setting the C field correctly
 223                          */
 224                         if (msg->cm_fields['C'] != NULL) {
 225                                 phree(msg->cm_fields['C']);
 226                         }
 227                         msg->cm_fields['C'] = strdoop(CC->quickroom.QRname);
 228
 229                         /*
 230                          * Now serialize it for transmission
 231                          */
 232                         serialize_message(&sermsg, msg);
 233                         CtdlFreeMessage(msg);
 234
 235                         /* Now send it to every node */
 236                         for (nptr = sc->ignet_push_shares; nptr != NULL;
 237                             nptr = nptr->next) {
 238
 239                                 /* FIXME check for valid node name */
 240                                 /* FIXME check for split horizon */
 241
 242                                 /* Send the message */
 243                                 sprintf(filename, "./network/spoolout/%s",
 244                                         nptr->name);
 245                                 fp = fopen(filename, "ab");
 246                                 if (fp != NULL) {
 247                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 248                                         fclose(fp);
 249                                 }
 250                         }
 251
 252
 253                 }
 254
 255         }
 256
 257         /* update lastsent */
 258         sc->lastsent = msgnum;
 259 }
 260
 261
 262
 263
 264 /*
 265  * Batch up and send all outbound traffic from the current room
 266  */
 267 void network_spoolout_room(char *room_to_spool) {
 268         char filename[SIZ];
 269         char buf[SIZ];
 270         char instr[SIZ];
 271         FILE *fp;
 272         struct SpoolControl sc;
 273         /* struct namelist *digestrecps = NULL; */
 274         struct namelist *nptr;
 275
 276         lprintf(7, "Spooling <%s>\n", room_to_spool);
 277         if (getroom(&CC->quickroom, room_to_spool) != 0) {
 278                 lprintf(1, "ERROR: cannot load <%s>\n", room_to_spool);
 279                 return;
 280         }
 281
 282         memset(&sc, 0, sizeof(struct SpoolControl));
 283         assoc_file_name(filename, &CC->quickroom, "netconfigs");
 284
 285         fp = fopen(filename, "r");
 286         if (fp == NULL) {
 287                 lprintf(7, "Outbound batch processing skipped for <%s>\n",
 288                         CC->quickroom.QRname);
 289                 return;
 290         }
 291
 292         lprintf(5, "Outbound batch processing started for <%s>\n",
 293                 CC->quickroom.QRname);
 294
 295         while (fgets(buf, sizeof buf, fp) != NULL) {
 296                 buf[strlen(buf)-1] = 0;
 297
 298                 extract(instr, buf, 0);
 299                 if (!strcasecmp(instr, "lastsent")) {
 300                         sc.lastsent = extract_long(buf, 1);
 301                 }
 302                 else if (!strcasecmp(instr, "listrecp")) {
 303                         nptr = (struct namelist *)
 304                                 mallok(sizeof(struct namelist));
 305                         nptr->next = sc.listrecps;
 306                         extract(nptr->name, buf, 1);
 307                         sc.listrecps = nptr;
 308                 }
 309                 else if (!strcasecmp(instr, "ignet_push_share")) {
 310                         nptr = (struct namelist *)
 311                                 mallok(sizeof(struct namelist));
 312                         nptr->next = sc.ignet_push_shares;
 313                         extract(nptr->name, buf, 1);
 314                         sc.ignet_push_shares = nptr;
 315                 }
 316
 317
 318         }
 319         fclose(fp);
 320
 321
 322         /* Do something useful */
 323         CtdlForEachMessage(MSGS_GT, sc.lastsent, (-63), NULL, NULL,
 324                 network_spool_msg, &sc);
 325
 326
 327         /* Now rewrite the config file */
 328         fp = fopen(filename, "w");
 329         if (fp == NULL) {
 330                 lprintf(1, "ERROR: cannot open %s: %s\n",
 331                         filename, strerror(errno));
 332         }
 333         else {
 334                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
 335
 336                 /* Write out the listrecps while freeing from memory at the
 337                  * same time.  Am I clever or what?  :)
 338                  */
 339                 while (sc.listrecps != NULL) {
 340                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
 341                         nptr = sc.listrecps->next;
 342                         phree(sc.listrecps);
 343                         sc.listrecps = nptr;
 344                 }
 345                 while (sc.ignet_push_shares != NULL) {
 346                         fprintf(fp, "ignet_push_share|%s\n",
 347                                 sc.ignet_push_shares->name);
 348                         nptr = sc.ignet_push_shares->next;
 349                         phree(sc.ignet_push_shares);
 350                         sc.ignet_push_shares = nptr;
 351                 }
 352
 353                 fclose(fp);
 354         }
 355
 356         lprintf(5, "Outbound batch processing finished for <%s>\n",
 357                 CC->quickroom.QRname);
 358 }
 359
 360
 361 /*
 362  * Batch up and send all outbound traffic from the current room
 363  */
 364 void network_queue_room(struct quickroom *qrbuf, void *data) {
 365         struct RoomProcList *ptr;
 366
 367         ptr = (struct RoomProcList *) mallok(sizeof (struct RoomProcList));
 368         if (ptr == NULL) return;
 369
 370         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
 371         ptr->next = rplist;
 372         rplist = ptr;
 373 }
 374
 375
 376 /*
 377  * network_do_queue()
 378  *
 379  * Run through the rooms doing various types of network stuff.
 380  */
 381 void network_do_queue(void) {
 382         static int doing_queue = 0;
 383         static time_t last_run = 0L;
 384         struct RoomProcList *ptr;
 385
 386 #define NETWORK_QUEUE_FREQUENCY 3600    /* one hour ... FIXME put in config */
 387         /*
 388          * Run no more frequently than once every n seconds
 389          */
 390         if ( (time(NULL) - last_run) < NETWORK_QUEUE_FREQUENCY ) return;
 391
 392         /*
 393          * This is a simple concurrency check to make sure only one queue run
 394          * is done at a time.  We could do this with a mutex, but since we
 395          * don't really require extremely fine granularity here, we'll do it
 396          * with a static variable instead.
 397          */
 398         if (doing_queue) return;
 399         doing_queue = 1;
 400         last_run = time(NULL);
 401
 402         /*
 403          * Go ahead and run the queue
 404          */
 405         lprintf(7, "network: loading outbound queue\n");
 406         ForEachRoom(network_queue_room, NULL);
 407
 408         lprintf(7, "network: running outbound queue\n");
 409         while (rplist != NULL) {
 410                 network_spoolout_room(rplist->name);
 411                 ptr = rplist;
 412                 rplist = rplist->next;
 413                 phree(ptr);
 414         }
 415
 416         lprintf(7, "network: queue run completed\n");
 417         doing_queue = 0;
 418 }
 419
 420
 421 /*
 422  * Module entry point
 423  */
 424 char *Dynamic_Module_Init(void)
 425 {
 426         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
 427         CtdlRegisterProtoHook(cmd_snet, "SNET", "Get network config");
 428         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
 429         return "$Id$";
 430 }