2 * This module handles shared rooms, inter-Citadel mail, and outbound
3 * mailing list processing.
5 * Copyright (c) 2000-2011 by the citadel.org team
7 * This program is open source software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * ** NOTE ** A word on the S_NETCONFIGS semaphore:
22 * This is a fairly high-level type of critical section. It ensures that no
23 * two threads work on the netconfigs files at the same time. Since we do
24 * so many things inside these, here are the rules:
25 * 1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
26 * 2. Do *not* perform any I/O with the client during these sections.
31 * Duration of time (in seconds) after which pending list subscribe/unsubscribe
32 * requests that have not been confirmed will be deleted.
34 #define EXP 259200 /* three days */
46 #include <sys/types.h>
48 #if TIME_WITH_SYS_TIME
49 # include <sys/time.h>
53 # include <sys/time.h>
61 # if HAVE_SYS_SYSCALL_H
62 # include <sys/syscall.h>
69 #include <libcitadel.h>
72 #include "citserver.h"
78 #include "internet_addressing.h"
79 #include "serv_network.h"
80 #include "clientsocket.h"
82 #include "citadel_dirs.h"
91 #include "ctdl_module.h"
96 * When we do network processing, it's accomplished in two passes; one to
97 * gather a list of rooms and one to actually do them. It's ok that rplist
98 * is global; we have a mutex that keeps it safe.
100 struct RoomProcList *rplist = NULL;
103 * We build a map of network nodes during processing.
105 NetMap *the_netmap = NULL;
106 int netmap_changed = 0;
107 char *working_ignetcfg = NULL;
110 * Load or refresh the Citadel network (IGnet) configuration for this node.
112 void load_working_ignetcfg(void) {
116 cfg = CtdlGetSysConfig(IGNETCFG);
121 oldcfg = working_ignetcfg;
122 working_ignetcfg = cfg;
123 if (oldcfg != NULL) {
133 * Keep track of what messages to reject
135 FilterList *load_filter_list(void) {
136 char *serialized_list = NULL;
139 FilterList *newlist = NULL;
142 serialized_list = CtdlGetSysConfig(FILTERLIST);
143 if (serialized_list == NULL) return(NULL); /* if null, no entries */
145 /* Use the string tokenizer to grab one line at a time */
146 for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
147 extract_token(buf, serialized_list, i, '\n', sizeof buf);
148 nptr = (FilterList *) malloc(sizeof(FilterList));
149 extract_token(nptr->fl_user, buf, 0, '|', sizeof nptr->fl_user);
150 striplt(nptr->fl_user);
151 extract_token(nptr->fl_room, buf, 1, '|', sizeof nptr->fl_room);
152 striplt(nptr->fl_room);
153 extract_token(nptr->fl_node, buf, 2, '|', sizeof nptr->fl_node);
154 striplt(nptr->fl_node);
156 /* Cowardly refuse to add an any/any/any entry that would
157 * end up filtering every single message.
159 if (IsEmptyStr(nptr->fl_user) &&
160 IsEmptyStr(nptr->fl_room) &&
161 IsEmptyStr(nptr->fl_node)) {
165 nptr->next = newlist;
170 free(serialized_list);
175 void free_filter_list(FilterList *fl) {
176 if (fl == NULL) return;
177 free_filter_list(fl->next);
184 * Check the use table. This is a list of messages which have recently
185 * arrived on the system. It is maintained and queried to prevent the same
186 * message from being entered into the database multiple times if it happens
187 * to arrive multiple times by accident.
189 int network_usetable(struct CtdlMessage *msg) {
192 struct cdbdata *cdbut;
195 /* Bail out if we can't generate a message ID */
199 if (msg->cm_fields['I'] == NULL) {
202 if (IsEmptyStr(msg->cm_fields['I'])) {
206 /* Generate the message ID */
207 strcpy(msgid, msg->cm_fields['I']);
208 if (haschar(msgid, '@') == 0) {
210 if (msg->cm_fields['N'] != NULL) {
211 strcat(msgid, msg->cm_fields['N']);
218 cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
221 syslog(LOG_DEBUG, "network_usetable() : we already have %s\n", msgid);
225 /* If we got to this point, it's unique: add it. */
226 strcpy(ut.ut_msgid, msgid);
227 ut.ut_timestamp = time(NULL);
228 cdb_store(CDB_USETABLE, msgid, strlen(msgid), &ut, sizeof(struct UseTable) );
234 * Read the network map from its configuration file into memory.
236 void read_network_map(void) {
237 char *serialized_map = NULL;
242 serialized_map = CtdlGetSysConfig(IGNETMAP);
243 if (serialized_map == NULL) return; /* if null, no entries */
245 /* Use the string tokenizer to grab one line at a time */
246 for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
247 extract_token(buf, serialized_map, i, '\n', sizeof buf);
248 nmptr = (NetMap *) malloc(sizeof(NetMap));
249 extract_token(nmptr->nodename, buf, 0, '|', sizeof nmptr->nodename);
250 nmptr->lastcontact = extract_long(buf, 1);
251 extract_token(nmptr->nexthop, buf, 2, '|', sizeof nmptr->nexthop);
252 nmptr->next = the_netmap;
256 free(serialized_map);
262 * Write the network map from memory back to the configuration file.
264 void write_network_map(void) {
265 char *serialized_map = NULL;
269 if (netmap_changed) {
270 serialized_map = strdup("");
272 if (the_netmap != NULL) {
273 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
274 serialized_map = realloc(serialized_map,
275 (strlen(serialized_map)+SIZ) );
276 if (!IsEmptyStr(nmptr->nodename)) {
277 snprintf(&serialized_map[strlen(serialized_map)],
281 (long)nmptr->lastcontact,
287 CtdlPutSysConfig(IGNETMAP, serialized_map);
288 free(serialized_map);
291 /* Now free the list */
292 while (the_netmap != NULL) {
293 nmptr = the_netmap->next;
303 * Check the network map and determine whether the supplied node name is
304 * valid. If it is not a neighbor node, supply the name of a neighbor node
305 * which is the next hop. If it *is* a neighbor node, we also fill in the
308 int is_valid_node(char *nexthop, char *secret, char *node) {
320 * First try the neighbor nodes
322 if (working_ignetcfg == NULL) {
323 syslog(LOG_ERR, "working_ignetcfg is NULL!\n");
324 if (nexthop != NULL) {
331 if (nexthop != NULL) {
335 /* Use the string tokenizer to grab one line at a time */
336 for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
337 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
338 extract_token(buf, linebuf, 0, '|', sizeof buf);
339 if (!strcasecmp(buf, node)) {
340 if (nexthop != NULL) {
343 if (secret != NULL) {
344 extract_token(secret, linebuf, 1, '|', 256);
351 return(retval); /* yup, it's a direct neighbor */
355 * If we get to this point we have to see if we know the next hop
357 if (the_netmap != NULL) {
358 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
359 if (!strcasecmp(nmptr->nodename, node)) {
360 if (nexthop != NULL) {
361 strcpy(nexthop, nmptr->nexthop);
369 * If we get to this point, the supplied node name is bogus.
371 syslog(LOG_ERR, "Invalid node name <%s>\n", node);
379 void cmd_gnet(char *argbuf) {
380 char filename[PATH_MAX];
384 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
385 /* users can edit the netconfigs for their own mailbox rooms */
387 else if (CtdlAccessCheck(ac_room_aide)) return;
389 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
390 cprintf("%d Network settings for room #%ld <%s>\n",
392 CC->room.QRnumber, CC->room.QRname);
394 fp = fopen(filename, "r");
396 while (fgets(buf, sizeof buf, fp) != NULL) {
397 buf[strlen(buf)-1] = 0;
398 cprintf("%s\n", buf);
407 void cmd_snet(char *argbuf) {
408 char tempfilename[PATH_MAX];
409 char filename[PATH_MAX];
418 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
419 /* users can edit the netconfigs for their own mailbox rooms */
421 else if (CtdlAccessCheck(ac_room_aide)) return;
423 len = assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
424 memcpy(tempfilename, filename, len + 1);
426 memset(&StatBuf, 0, sizeof(struct stat));
427 if ((stat(filename, &StatBuf) == -1) || (StatBuf.st_size == 0))
428 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
430 sprintf(tempfilename + len, ".%d", CC->cs_pid);
432 TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
434 if ((TmpFD > 0) && (errno == 0))
436 char *tmp = malloc(StatBuf.st_size * 2);
437 memset(tmp, ' ', StatBuf.st_size * 2);
438 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
440 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
443 cprintf("%d Unable to allocate the space required for %s: %s\n",
444 ERROR + INTERNAL_ERROR,
447 unlink(tempfilename);
450 lseek(TmpFD, SEEK_SET, 0);
453 cprintf("%d Unable to allocate the space required for %s: %s\n",
454 ERROR + INTERNAL_ERROR,
457 unlink(tempfilename);
462 cprintf("%d %s\n", SEND_LISTING, tempfilename);
465 while (rc = CtdlClientGetLine(Line),
468 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
470 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
471 write(TmpFD, ChrPtr(Line), StrLength(Line));
472 len += StrLength(Line);
475 ftruncate(TmpFD, len);
478 /* Now copy the temp file to its permanent location.
479 * (We copy instead of link because they may be on different filesystems)
481 begin_critical_section(S_NETCONFIGS);
482 rename(tempfilename, filename);
483 end_critical_section(S_NETCONFIGS);
488 * Deliver digest messages
490 void network_deliver_digest(SpoolControl *sc) {
493 struct CtdlMessage *msg = NULL;
496 size_t recps_len = SIZ;
498 struct recptypes *valid;
502 if (sc->num_msgs_spooled < 1) {
503 fclose(sc->digestfp);
508 msg = malloc(sizeof(struct CtdlMessage));
509 memset(msg, 0, sizeof(struct CtdlMessage));
510 msg->cm_magic = CTDLMESSAGE_MAGIC;
511 msg->cm_format_type = FMT_RFC822;
512 msg->cm_anon_type = MES_NORMAL;
514 sprintf(buf, "%ld", time(NULL));
515 msg->cm_fields['T'] = strdup(buf);
516 msg->cm_fields['A'] = strdup(CC->room.QRname);
517 snprintf(buf, sizeof buf, "[%s]", CC->room.QRname);
518 msg->cm_fields['U'] = strdup(buf);
519 sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
520 for (i=0; buf[i]; ++i) {
521 if (isspace(buf[i])) buf[i]='_';
522 buf[i] = tolower(buf[i]);
524 msg->cm_fields['F'] = strdup(buf);
525 msg->cm_fields['R'] = strdup(buf);
527 /* Set the 'List-ID' header */
528 msg->cm_fields['L'] = malloc(1024);
529 snprintf(msg->cm_fields['L'], 1024,
530 "%s <%ld.list-id.%s>",
537 * Go fetch the contents of the digest
539 fseek(sc->digestfp, 0L, SEEK_END);
540 msglen = ftell(sc->digestfp);
542 msg->cm_fields['M'] = malloc(msglen + 1);
543 fseek(sc->digestfp, 0L, SEEK_SET);
544 siz = fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
545 msg->cm_fields['M'][msglen] = '\0';
547 fclose(sc->digestfp);
550 /* Now generate the delivery instructions */
553 * Figure out how big a buffer we need to allocate
555 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
556 recps_len = recps_len + strlen(nptr->name) + 2;
559 recps = malloc(recps_len);
562 syslog(LOG_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
569 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
570 if (nptr != sc->digestrecps) {
573 strcat(recps, nptr->name);
576 /* Where do we want bounces and other noise to be heard? Surely not the list members! */
577 snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
579 /* Now submit the message */
580 valid = validate_recipients(recps, NULL, 0);
583 valid->bounce_to = strdup(bounce_to);
584 valid->envelope_from = strdup(bounce_to);
585 CtdlSubmitMsg(msg, valid, NULL, 0);
587 CtdlFreeMessage(msg);
588 free_recipients(valid);
593 * Deliver list messages to everyone on the list ... efficiently
595 void network_deliver_list(struct CtdlMessage *msg, SpoolControl *sc) {
597 size_t recps_len = SIZ;
598 struct recptypes *valid;
602 /* Don't do this if there were no recipients! */
603 if (sc->listrecps == NULL) return;
605 /* Now generate the delivery instructions */
608 * Figure out how big a buffer we need to allocate
610 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
611 recps_len = recps_len + strlen(nptr->name) + 2;
614 recps = malloc(recps_len);
617 syslog(LOG_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
624 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
625 if (nptr != sc->listrecps) {
628 strcat(recps, nptr->name);
631 /* Where do we want bounces and other noise to be heard? Surely not the list members! */
632 snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
634 /* Now submit the message */
635 valid = validate_recipients(recps, NULL, 0);
638 valid->bounce_to = strdup(bounce_to);
639 valid->envelope_from = strdup(bounce_to);
640 CtdlSubmitMsg(msg, valid, NULL, 0);
641 free_recipients(valid);
643 /* Do not call CtdlFreeMessage(msg) here; the caller will free it. */
650 * Spools out one message from the list.
652 void network_spool_msg(long msgnum, void *userdata) {
655 char *newpath = NULL;
656 size_t instr_len = SIZ;
657 struct CtdlMessage *msg = NULL;
660 struct ser_ret sermsg;
662 char filename[PATH_MAX];
666 int delete_after_send = 0; /* Set to 1 to delete after spooling */
667 int ok_to_participate = 0;
668 struct recptypes *valid;
670 sc = (SpoolControl *)userdata;
673 * Process mailing list recipients
676 if (sc->listrecps != NULL) {
677 /* Fetch the message. We're going to need to modify it
678 * in order to insert the [list name] in it, etc.
680 msg = CtdlFetchMessage(msgnum, 1);
685 if (msg->cm_fields['V'] == NULL){
686 /* local message, no enVelope */
689 StrBufAppendBufPlain(Buf, msg->cm_fields['O'], -1, 0);
690 StrBufAppendBufPlain(Buf, HKEY("@"), 0);
691 StrBufAppendBufPlain(Buf, config.c_fqdn, -1, 0);
693 msg->cm_fields['K'] = SmashStrBuf(&Buf);
696 msg->cm_fields['K'] = strdup (msg->cm_fields['V']);
698 /* Set the 'List-ID' header */
699 if (msg->cm_fields['L'] != NULL) {
700 free(msg->cm_fields['L']);
702 msg->cm_fields['L'] = malloc(1024);
703 snprintf(msg->cm_fields['L'], 1024,
704 "%s <%ld.list-id.%s>",
710 /* Prepend "[List name]" to the subject */
711 if (msg->cm_fields['U'] == NULL) {
712 msg->cm_fields['U'] = strdup("(no subject)");
715 len = strlen(msg->cm_fields['U']);
716 rlen = strlen(CC->room.QRname);
717 pCh = strstr(msg->cm_fields['U'], CC->room.QRname);
719 (*(pCh + rlen) != ']') ||
720 (pCh == msg->cm_fields['U']) ||
727 pBuff = malloc (rlen * sizeof(char));
729 snprintf(pBuff, rlen, "[%s] %s", CC->room.QRname, msg->cm_fields['U']);
730 free(msg->cm_fields['U']);
731 msg->cm_fields['U'] = pBuff;
733 /* else we won't modify the buffer, since the roomname is already here. */
735 /* if we don't already have a 'reply to' field, put our roomname in. */
736 if (msg->cm_fields['K'] == NULL) {
737 msg->cm_fields['K'] = malloc(256);
738 snprintf(msg->cm_fields['K'], 256,
739 "room_%s@%s", CC->room.QRname,
741 for (i=0; msg->cm_fields['K'][i]; ++i) {
742 if (isspace(msg->cm_fields['K'][i])) {
743 msg->cm_fields['K'][i] = '_';
748 /* Handle delivery */
749 network_deliver_list(msg, sc);
750 CtdlFreeMessage(msg);
755 * Process digest recipients
757 if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
758 msg = CtdlFetchMessage(msgnum, 1);
760 fprintf(sc->digestfp, " -----------------------------------"
761 "------------------------------------"
763 fprintf(sc->digestfp, "From: ");
764 if (msg->cm_fields['A'] != NULL) {
765 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
767 if (msg->cm_fields['F'] != NULL) {
768 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
770 else if (msg->cm_fields['N'] != NULL) {
771 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
773 fprintf(sc->digestfp, "\n");
774 if (msg->cm_fields['U'] != NULL) {
775 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
778 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
780 safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
781 CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
783 StrBufTrim(CC->redirect_buffer);
784 fwrite(HKEY("\n"), 1, sc->digestfp);
785 fwrite(SKEY(CC->redirect_buffer), 1, sc->digestfp);
786 fwrite(HKEY("\n"), 1, sc->digestfp);
788 FreeStrBuf(&CC->redirect_buffer);
790 sc->num_msgs_spooled += 1;
796 * Process client-side list participations for this room
799 if (sc->participates != NULL) {
800 msg = CtdlFetchMessage(msgnum, 1);
803 /* Only send messages which originated on our own Citadel
804 * network, otherwise we'll end up sending the remote
805 * mailing list's messages back to it, which is rude...
807 ok_to_participate = 0;
808 if (msg->cm_fields['N'] != NULL) {
809 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
810 ok_to_participate = 1;
812 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
813 ok_to_participate = 1;
816 if (ok_to_participate) {
817 if (msg->cm_fields['F'] != NULL) {
818 free(msg->cm_fields['F']);
820 msg->cm_fields['F'] = malloc(SIZ);
821 /* Replace the Internet email address of the actual
822 * author with the email address of the room itself,
823 * so the remote listserv doesn't reject us.
824 * FIXME ... I want to be able to pick any address
826 snprintf(msg->cm_fields['F'], SIZ,
827 "room_%s@%s", CC->room.QRname,
829 for (i=0; msg->cm_fields['F'][i]; ++i) {
830 if (isspace(msg->cm_fields['F'][i])) {
831 msg->cm_fields['F'][i] = '_';
836 * Figure out how big a buffer we need to allocate
838 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
840 if (msg->cm_fields['R'] == NULL) {
841 free(msg->cm_fields['R']);
843 msg->cm_fields['R'] = strdup(nptr->name);
845 valid = validate_recipients(nptr->name, NULL, 0);
846 CtdlSubmitMsg(msg, valid, "", 0);
847 free_recipients(valid);
851 CtdlFreeMessage(msg);
856 * Process IGnet push shares
858 msg = CtdlFetchMessage(msgnum, 1);
862 /* Prepend our node name to the Path field whenever
863 * sending a message to another IGnet node
865 if (msg->cm_fields['P'] == NULL) {
866 msg->cm_fields['P'] = strdup("username");
868 newpath_len = strlen(msg->cm_fields['P']) +
869 strlen(config.c_nodename) + 2;
870 newpath = malloc(newpath_len);
871 snprintf(newpath, newpath_len, "%s!%s",
872 config.c_nodename, msg->cm_fields['P']);
873 free(msg->cm_fields['P']);
874 msg->cm_fields['P'] = newpath;
877 * Determine if this message is set to be deleted
878 * after sending out on the network
880 if (msg->cm_fields['S'] != NULL) {
881 if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
882 delete_after_send = 1;
886 /* Now send it to every node */
887 if (sc->ignet_push_shares != NULL)
888 for (mptr = sc->ignet_push_shares; mptr != NULL;
893 /* Check for valid node name */
894 if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
895 syslog(LOG_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
899 /* Check for split horizon */
900 syslog(LOG_DEBUG, "Path is %s\n", msg->cm_fields['P']);
901 bang = num_tokens(msg->cm_fields['P'], '!');
902 if (bang > 1) for (i=0; i<(bang-1); ++i) {
903 extract_token(buf, msg->cm_fields['P'], i, '!', sizeof buf);
904 syslog(LOG_DEBUG, "Compare <%s> to <%s>\n",
905 buf, mptr->remote_nodename) ;
906 if (!strcasecmp(buf, mptr->remote_nodename)) {
908 syslog(LOG_DEBUG, "Not sending to %s\n",
909 mptr->remote_nodename);
912 syslog(LOG_DEBUG, "Sending to %s\n", mptr->remote_nodename);
916 /* Send the message */
920 * Force the message to appear in the correct room
921 * on the far end by setting the C field correctly
923 if (msg->cm_fields['C'] != NULL) {
924 free(msg->cm_fields['C']);
926 if (!IsEmptyStr(mptr->remote_roomname)) {
927 msg->cm_fields['C'] = strdup(mptr->remote_roomname);
930 msg->cm_fields['C'] = strdup(CC->room.QRname);
933 /* serialize it for transmission */
934 serialize_message(&sermsg, msg);
935 if (sermsg.len > 0) {
937 /* write it to a spool file */
938 snprintf(filename, sizeof filename,"%s/%s@%lx%x",
940 mptr->remote_nodename,
944 syslog(LOG_DEBUG, "Appending to %s\n", filename);
945 fp = fopen(filename, "ab");
952 syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
955 /* free the serialized version */
961 CtdlFreeMessage(msg);
964 /* update lastsent */
965 sc->lastsent = msgnum;
967 /* Delete this message if delete-after-send is set */
968 if (delete_after_send) {
969 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
975 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
981 char roomname[ROOMNAMELEN];
984 int skipthisline = 0;
985 namelist *nptr = NULL;
986 maplist *mptr = NULL;
989 fp = fopen(filename, "r");
993 sc = malloc(sizeof(SpoolControl));
994 memset(sc, 0, sizeof(SpoolControl));
997 while (fgets(buf, sizeof buf, fp) != NULL) {
998 buf[strlen(buf)-1] = 0;
1000 extract_token(instr, buf, 0, '|', sizeof instr);
1001 if (!strcasecmp(instr, strof(lastsent))) {
1002 sc->lastsent = extract_long(buf, 1);
1004 else if (!strcasecmp(instr, strof(listrecp))) {
1006 malloc(sizeof(namelist));
1007 nptr->next = sc->listrecps;
1008 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1009 sc->listrecps = nptr;
1011 else if (!strcasecmp(instr, strof(participate))) {
1013 malloc(sizeof(namelist));
1014 nptr->next = sc->participates;
1015 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1016 sc->participates = nptr;
1018 else if (!strcasecmp(instr, strof(digestrecp))) {
1020 malloc(sizeof(namelist));
1021 nptr->next = sc->digestrecps;
1022 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1023 sc->digestrecps = nptr;
1025 else if (!strcasecmp(instr, strof(ignet_push_share))) {
1026 extract_token(nodename, buf, 1, '|', sizeof nodename);
1027 extract_token(roomname, buf, 2, '|', sizeof roomname);
1028 mptr = (maplist *) malloc(sizeof(maplist));
1029 mptr->next = sc->ignet_push_shares;
1030 strcpy(mptr->remote_nodename, nodename);
1031 strcpy(mptr->remote_roomname, roomname);
1032 sc->ignet_push_shares = mptr;
1035 /* Preserve 'other' lines ... *unless* they happen to
1036 * be subscribe/unsubscribe pendings with expired
1040 if (!strncasecmp(buf, strof(subpending)"|", 11)) {
1041 if (time(NULL) - extract_long(buf, 4) > EXP) {
1045 if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
1046 if (time(NULL) - extract_long(buf, 3) > EXP) {
1051 if (skipthisline == 0) {
1052 linesize = strlen(buf);
1053 sc->misc = realloc(sc->misc,
1054 (miscsize + linesize + 2) );
1055 sprintf(&sc->misc[miscsize], "%s\n", buf);
1056 miscsize = miscsize + linesize + 1;
1066 void free_spoolcontrol_struct(SpoolControl **scc)
1069 namelist *nptr = NULL;
1070 maplist *mptr = NULL;
1073 while (sc->listrecps != NULL) {
1074 nptr = sc->listrecps->next;
1075 free(sc->listrecps);
1076 sc->listrecps = nptr;
1078 /* Do the same for digestrecps */
1079 while (sc->digestrecps != NULL) {
1080 nptr = sc->digestrecps->next;
1081 free(sc->digestrecps);
1082 sc->digestrecps = nptr;
1084 /* Do the same for participates */
1085 while (sc->participates != NULL) {
1086 nptr = sc->participates->next;
1087 free(sc->participates);
1088 sc->participates = nptr;
1090 while (sc->ignet_push_shares != NULL) {
1091 mptr = sc->ignet_push_shares->next;
1092 free(sc->ignet_push_shares);
1093 sc->ignet_push_shares = mptr;
1100 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
1102 char tempfilename[PATH_MAX];
1105 namelist *nptr = NULL;
1106 maplist *mptr = NULL;
1110 long reltid; /* if we don't have SYS_gettid, use "random" value */
1114 len = strlen(filename);
1115 memcpy(tempfilename, filename, len + 1);
1118 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
1119 reltid = syscall(SYS_gettid);
1121 gettimeofday(&tv, NULL);
1122 /* Promote to time_t; types differ on some OSes (like darwin) */
1123 unixtime = tv.tv_sec;
1125 sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
1128 TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
1130 if ((TmpFD < 0) || (errno != 0)) {
1131 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
1132 filename, strerror(errno));
1133 free_spoolcontrol_struct(scc);
1134 unlink(tempfilename);
1137 fchown(TmpFD, config.c_ctdluid, 0);
1138 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
1140 /* Write out the listrecps while freeing from memory at the
1141 * same time. Am I clever or what? :)
1143 while (sc->listrecps != NULL) {
1144 StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
1145 nptr = sc->listrecps->next;
1146 free(sc->listrecps);
1147 sc->listrecps = nptr;
1149 /* Do the same for digestrecps */
1150 while (sc->digestrecps != NULL) {
1151 StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
1152 nptr = sc->digestrecps->next;
1153 free(sc->digestrecps);
1154 sc->digestrecps = nptr;
1156 /* Do the same for participates */
1157 while (sc->participates != NULL) {
1158 StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
1159 nptr = sc->participates->next;
1160 free(sc->participates);
1161 sc->participates = nptr;
1163 while (sc->ignet_push_shares != NULL) {
1164 StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1165 if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1166 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
1168 StrBufAppendPrintf(Cfg, "\n");
1169 mptr = sc->ignet_push_shares->next;
1170 free(sc->ignet_push_shares);
1171 sc->ignet_push_shares = mptr;
1173 if (sc->misc != NULL) {
1174 StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
1178 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
1179 if ((rc >=0 ) && (rc == StrLength(Cfg)))
1182 rename(tempfilename, filename);
1186 "unable to write %s; [%s]; not enough space on the disk?\n",
1190 unlink(tempfilename);
1198 int is_recipient(SpoolControl *sc, const char *Name)
1204 nptr = sc->listrecps;
1205 while (nptr != NULL) {
1206 if (strncmp(Name, nptr->name, len)==0)
1210 /* Do the same for digestrecps */
1211 nptr = sc->digestrecps;
1212 while (nptr != NULL) {
1213 if (strncmp(Name, nptr->name, len)==0)
1217 /* Do the same for participates */
1218 nptr = sc->participates;
1219 while (nptr != NULL) {
1220 if (strncmp(Name, nptr->name, len)==0)
1229 * Batch up and send all outbound traffic from the current room
1231 void network_spoolout_room(char *room_to_spool) {
1233 char filename[PATH_MAX];
1238 * If the room doesn't exist, don't try to perform its networking tasks.
1239 * Normally this should never happen, but once in a while maybe a room gets
1240 * queued for networking and then deleted before it can happen.
1242 if (CtdlGetRoom(&CC->room, room_to_spool) != 0) {
1243 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1247 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1248 begin_critical_section(S_NETCONFIGS);
1250 /* Only do net processing for rooms that have netconfigs */
1251 if (!read_spoolcontrol_file(&sc, filename))
1253 end_critical_section(S_NETCONFIGS);
1256 syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
1258 /* If there are digest recipients, we have to build a digest */
1259 if (sc->digestrecps != NULL) {
1260 sc->digestfp = tmpfile();
1261 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1264 /* Do something useful */
1265 CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1266 network_spool_msg, sc);
1268 /* If we wrote a digest, deliver it and then close it */
1269 snprintf(buf, sizeof buf, "room_%s@%s",
1270 CC->room.QRname, config.c_fqdn);
1271 for (i=0; buf[i]; ++i) {
1272 buf[i] = tolower(buf[i]);
1273 if (isspace(buf[i])) buf[i] = '_';
1275 if (sc->digestfp != NULL) {
1276 fprintf(sc->digestfp, " -----------------------------------"
1277 "------------------------------------"
1279 "You are subscribed to the '%s' "
1281 "To post to the list: %s\n",
1282 CC->room.QRname, buf
1284 network_deliver_digest(sc); /* deliver and close */
1287 /* Now rewrite the config file */
1288 writenfree_spoolcontrol_file(&sc, filename);
1289 end_critical_section(S_NETCONFIGS);
1295 * Send the *entire* contents of the current room to one specific network node,
1296 * ignoring anything we know about which messages have already undergone
1297 * network processing. This can be used to bring a new node into sync.
1299 int network_sync_to(char *target_node) {
1301 int num_spooled = 0;
1307 char filename[PATH_MAX];
1310 /* Grab the configuration line we're looking for */
1311 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1312 begin_critical_section(S_NETCONFIGS);
1313 fp = fopen(filename, "r");
1315 end_critical_section(S_NETCONFIGS);
1318 while (fgets(buf, sizeof buf, fp) != NULL) {
1319 buf[strlen(buf)-1] = 0;
1320 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1321 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1322 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1323 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1324 && (!strcasecmp(sc_node, target_node)) ) {
1327 /* Concise syntax because we don't need a full linked-list */
1328 memset(&sc, 0, sizeof(SpoolControl));
1329 sc.ignet_push_shares = (maplist *)
1330 malloc(sizeof(maplist));
1331 sc.ignet_push_shares->next = NULL;
1332 safestrncpy(sc.ignet_push_shares->remote_nodename,
1334 sizeof sc.ignet_push_shares->remote_nodename);
1335 safestrncpy(sc.ignet_push_shares->remote_roomname,
1337 sizeof sc.ignet_push_shares->remote_roomname);
1341 end_critical_section(S_NETCONFIGS);
1343 if (!found_node) return(-1);
1345 /* Send ALL messages */
1346 num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1347 network_spool_msg, &sc);
1349 /* Concise cleanup because we know there's only one node in the sc */
1350 free(sc.ignet_push_shares);
1352 syslog(LOG_NOTICE, "Synchronized %d messages to <%s>\n",
1353 num_spooled, target_node);
1354 return(num_spooled);
1359 * Implements the NSYN command
1361 void cmd_nsyn(char *argbuf) {
1363 char target_node[256];
1365 if (CtdlAccessCheck(ac_aide)) return;
1367 extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1368 num_spooled = network_sync_to(target_node);
1369 if (num_spooled >= 0) {
1370 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1373 cprintf("%d No such room/node share exists.\n",
1374 ERROR + ROOM_NOT_FOUND);
1381 * Batch up and send all outbound traffic from the current room
1383 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1384 struct RoomProcList *ptr;
1386 ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1387 if (ptr == NULL) return;
1389 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1390 begin_critical_section(S_RPLIST);
1393 end_critical_section(S_RPLIST);
1396 void destroy_network_queue_room(void)
1398 struct RoomProcList *cur, *p;
1399 NetMap *nmcur, *nmp;
1402 begin_critical_section(S_RPLIST);
1410 end_critical_section(S_RPLIST);
1413 while (nmcur != NULL)
1420 if (working_ignetcfg != NULL)
1421 free (working_ignetcfg);
1422 working_ignetcfg = NULL;
1427 * Learn topology from path fields
1429 void network_learn_topology(char *node, char *path) {
1433 strcpy(nexthop, "");
1435 if (num_tokens(path, '!') < 3) return;
1436 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1437 if (!strcasecmp(nmptr->nodename, node)) {
1438 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1439 nmptr->lastcontact = time(NULL);
1445 /* If we got here then it's not in the map, so add it. */
1446 nmptr = (NetMap *) malloc(sizeof (NetMap));
1447 strcpy(nmptr->nodename, node);
1448 nmptr->lastcontact = time(NULL);
1449 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1450 nmptr->next = the_netmap;
1459 * Bounce a message back to the sender
1461 void network_bounce(struct CtdlMessage *msg, char *reason) {
1462 char *oldpath = NULL;
1464 char bouncesource[SIZ];
1465 char recipient[SIZ];
1466 struct recptypes *valid = NULL;
1467 char force_room[ROOMNAMELEN];
1468 static int serialnum = 0;
1471 syslog(LOG_DEBUG, "entering network_bounce()\n");
1473 if (msg == NULL) return;
1475 snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1478 * Give it a fresh message ID
1480 if (msg->cm_fields['I'] != NULL) {
1481 free(msg->cm_fields['I']);
1483 snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1484 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1485 msg->cm_fields['I'] = strdup(buf);
1488 * FIXME ... right now we're just sending a bounce; we really want to
1489 * include the text of the bounced message.
1491 if (msg->cm_fields['M'] != NULL) {
1492 free(msg->cm_fields['M']);
1494 msg->cm_fields['M'] = strdup(reason);
1495 msg->cm_format_type = 0;
1498 * Turn the message around
1500 if (msg->cm_fields['R'] == NULL) {
1501 free(msg->cm_fields['R']);
1504 if (msg->cm_fields['D'] == NULL) {
1505 free(msg->cm_fields['D']);
1508 snprintf(recipient, sizeof recipient, "%s@%s",
1509 msg->cm_fields['A'], msg->cm_fields['N']);
1511 if (msg->cm_fields['A'] == NULL) {
1512 free(msg->cm_fields['A']);
1515 if (msg->cm_fields['N'] == NULL) {
1516 free(msg->cm_fields['N']);
1519 if (msg->cm_fields['U'] == NULL) {
1520 free(msg->cm_fields['U']);
1523 msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1524 msg->cm_fields['N'] = strdup(config.c_nodename);
1525 msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1527 /* prepend our node to the path */
1528 if (msg->cm_fields['P'] != NULL) {
1529 oldpath = msg->cm_fields['P'];
1530 msg->cm_fields['P'] = NULL;
1533 oldpath = strdup("unknown_user");
1535 size = strlen(oldpath) + SIZ;
1536 msg->cm_fields['P'] = malloc(size);
1537 snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1540 /* Now submit the message */
1541 valid = validate_recipients(recipient, NULL, 0);
1542 if (valid != NULL) if (valid->num_error != 0) {
1543 free_recipients(valid);
1546 if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1547 strcpy(force_room, config.c_aideroom);
1550 strcpy(force_room, "");
1552 if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1553 strcpy(force_room, config.c_aideroom);
1555 CtdlSubmitMsg(msg, valid, force_room, 0);
1558 if (valid != NULL) free_recipients(valid);
1559 CtdlFreeMessage(msg);
1560 syslog(LOG_DEBUG, "leaving network_bounce()\n");
1567 * Process a buffer containing a single message from a single file
1568 * from the inbound queue
1570 void network_process_buffer(char *buffer, long size) {
1571 struct CtdlMessage *msg = NULL;
1574 struct recptypes *recp = NULL;
1575 char target_room[ROOMNAMELEN];
1576 struct ser_ret sermsg;
1577 char *oldpath = NULL;
1578 char filename[PATH_MAX];
1581 unsigned char firstbyte;
1582 unsigned char lastbyte;
1584 syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
1586 /* Validate just a little bit. First byte should be FF and * last byte should be 00. */
1587 firstbyte = buffer[0];
1588 lastbyte = buffer[size-1];
1589 if ( (firstbyte != 255) || (lastbyte != 0) ) {
1590 syslog(LOG_ERR, "Corrupt message ignored. Length=%ld, firstbyte = %d, lastbyte = %d\n",
1591 size, firstbyte, lastbyte);
1595 /* Set default target room to trash */
1596 strcpy(target_room, TWITROOM);
1598 /* Load the message into memory */
1599 msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1600 memset(msg, 0, sizeof(struct CtdlMessage));
1601 msg->cm_magic = CTDLMESSAGE_MAGIC;
1602 msg->cm_anon_type = buffer[1];
1603 msg->cm_format_type = buffer[2];
1605 for (pos = 3; pos < size; ++pos) {
1606 field = buffer[pos];
1607 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1608 pos = pos + strlen(&buffer[(int)pos]);
1611 /* Check for message routing */
1612 if (msg->cm_fields['D'] != NULL) {
1613 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1615 /* route the message */
1616 strcpy(nexthop, "");
1617 if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1618 /* prepend our node to the path */
1619 if (msg->cm_fields['P'] != NULL) {
1620 oldpath = msg->cm_fields['P'];
1621 msg->cm_fields['P'] = NULL;
1624 oldpath = strdup("unknown_user");
1626 size = strlen(oldpath) + SIZ;
1627 msg->cm_fields['P'] = malloc(size);
1628 snprintf(msg->cm_fields['P'], size, "%s!%s",
1629 config.c_nodename, oldpath);
1632 /* serialize the message */
1633 serialize_message(&sermsg, msg);
1636 if (IsEmptyStr(nexthop)) {
1637 strcpy(nexthop, msg->cm_fields['D']);
1647 syslog(LOG_DEBUG, "Appending to %s\n", filename);
1648 fp = fopen(filename, "ab");
1650 fwrite(sermsg.ser, sermsg.len, 1, fp);
1654 syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
1657 CtdlFreeMessage(msg);
1661 else { /* invalid destination node name */
1664 "A message you sent could not be delivered due to an invalid destination node"
1665 " name. Please check the address and try sending the message again.\n");
1674 * Check to see if we already have a copy of this message, and
1675 * abort its processing if so. (We used to post a warning to Aide>
1676 * every time this happened, but the network is now so densely
1677 * connected that it's inevitable.)
1679 if (network_usetable(msg) != 0) {
1680 CtdlFreeMessage(msg);
1684 /* Learn network topology from the path */
1685 if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1686 network_learn_topology(msg->cm_fields['N'], msg->cm_fields['P']);
1689 /* Is the sending node giving us a very persuasive suggestion about
1690 * which room this message should be saved in? If so, go with that.
1692 if (msg->cm_fields['C'] != NULL) {
1693 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
1696 /* Otherwise, does it have a recipient? If so, validate it... */
1697 else if (msg->cm_fields['R'] != NULL) {
1698 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1699 if (recp != NULL) if (recp->num_error != 0) {
1701 "A message you sent could not be delivered due to an invalid address.\n"
1702 "Please check the address and try sending the message again.\n");
1704 free_recipients(recp);
1705 syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
1708 strcpy(target_room, ""); /* no target room if mail */
1711 /* Our last shot at finding a home for this message is to see if
1712 * it has the O field (Originating room) set.
1714 else if (msg->cm_fields['O'] != NULL) {
1715 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
1718 /* Strip out fields that are only relevant during transit */
1719 if (msg->cm_fields['D'] != NULL) {
1720 free(msg->cm_fields['D']);
1721 msg->cm_fields['D'] = NULL;
1723 if (msg->cm_fields['C'] != NULL) {
1724 free(msg->cm_fields['C']);
1725 msg->cm_fields['C'] = NULL;
1728 /* save the message into a room */
1729 if (PerformNetprocHooks(msg, target_room) == 0) {
1730 msg->cm_flags = CM_SKIP_HOOKS;
1731 CtdlSubmitMsg(msg, recp, target_room, 0);
1733 CtdlFreeMessage(msg);
1734 free_recipients(recp);
1739 * Process a single message from a single file from the inbound queue
1741 void network_process_message(FILE *fp, long msgstart, long msgend) {
1746 hold_pos = ftell(fp);
1747 size = msgend - msgstart + 1;
1748 buffer = malloc(size);
1749 if (buffer != NULL) {
1750 fseek(fp, msgstart, SEEK_SET);
1751 if (fread(buffer, size, 1, fp) > 0) {
1752 network_process_buffer(buffer, size);
1757 fseek(fp, hold_pos, SEEK_SET);
1762 * Process a single file from the inbound queue
1764 void network_process_file(char *filename) {
1766 long msgstart = (-1L);
1767 long msgend = (-1L);
1772 fp = fopen(filename, "rb");
1774 syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1778 fseek(fp, 0L, SEEK_END);
1779 syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1782 /* Look for messages in the data stream and break them out */
1783 while (ch = getc(fp), ch >= 0) {
1786 if (msgstart >= 0L) {
1787 msgend = msgcur - 1;
1788 network_process_message(fp, msgstart, msgend);
1796 msgend = msgcur - 1;
1797 if (msgstart >= 0L) {
1798 network_process_message(fp, msgstart, msgend);
1807 * Process anything in the inbound queue
1809 void network_do_spoolin(void) {
1812 struct stat statbuf;
1813 char filename[PATH_MAX];
1814 static time_t last_spoolin_mtime = 0L;
1817 * Check the spoolin directory's modification time. If it hasn't
1818 * been touched, we don't need to scan it.
1820 if (stat(ctdl_netin_dir, &statbuf)) return;
1821 if (statbuf.st_mtime == last_spoolin_mtime) {
1822 syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
1825 last_spoolin_mtime = statbuf.st_mtime;
1826 syslog(LOG_DEBUG, "network: processing inbound queue\n");
1829 * Ok, there's something interesting in there, so scan it.
1831 dp = opendir(ctdl_netin_dir);
1832 if (dp == NULL) return;
1834 while (d = readdir(dp), d != NULL) {
1835 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1842 network_process_file(filename);
1850 * Step 1: consolidate files in the outbound queue into one file per neighbor node
1851 * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
1853 void network_consolidate_spoolout(void) {
1856 char filename[PATH_MAX];
1862 /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
1863 dp = opendir(ctdl_netout_dir);
1864 if (dp == NULL) return;
1865 while (d = readdir(dp), d != NULL) {
1867 (strcmp(d->d_name, "."))
1868 && (strcmp(d->d_name, ".."))
1869 && (strchr(d->d_name, '@') != NULL)
1871 safestrncpy(nexthop, d->d_name, sizeof nexthop);
1872 ptr = strchr(nexthop, '@');
1882 syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
1883 if (network_talking_to(nexthop, NTT_CHECK)) {
1885 "Currently online with %s - skipping for now\n",
1890 network_talking_to(nexthop, NTT_ADD);
1891 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
1893 ctdl_netout_dir, nexthop,
1897 network_talking_to(nexthop, NTT_REMOVE);
1903 /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1905 dp = opendir(ctdl_netout_dir);
1906 if (dp == NULL) return;
1908 while (d = readdir(dp), d != NULL) {
1909 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1911 ptr = strchr(d->d_name, '@');
1921 strcpy(nexthop, "");
1922 i = is_valid_node(nexthop, NULL, d->d_name);
1924 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1935 * receive network spool from the remote system
1937 void receive_spool(int *sock, char *remote_nodename) {
1938 int download_len = 0L;
1939 int bytes_received = 0L;
1941 char tempfilename[PATH_MAX];
1942 char permfilename[PATH_MAX];
1946 snprintf(tempfilename,
1947 sizeof tempfilename,
1955 snprintf(permfilename,
1956 sizeof permfilename,
1964 if (sock_puts(sock, "NDOP") < 0) return;
1965 if (sock_getln(sock, buf, sizeof buf) < 0) return;
1966 syslog(LOG_DEBUG, "<%s\n", buf);
1967 if (buf[0] != '2') {
1971 download_len = extract_long(&buf[4], 0);
1972 if (download_len <= 0) {
1976 bytes_received = 0L;
1977 fp = fopen(tempfilename, "w");
1979 syslog(LOG_CRIT, "Cannot create %s: %s\n", tempfilename, strerror(errno));
1983 syslog(LOG_DEBUG, "Expecting to transfer %d bytes\n", download_len);
1984 while (bytes_received < download_len) {
1986 * If shutting down we can exit here and unlink the temp file.
1987 * this shouldn't loose us any messages.
1989 if (server_shutting_down)
1992 unlink(tempfilename);
1995 snprintf(buf, sizeof buf, "READ %d|%d",
1997 ((download_len - bytes_received > IGNET_PACKET_SIZE)
1998 ? IGNET_PACKET_SIZE : (download_len - bytes_received))
2001 if (sock_puts(sock, buf) < 0) {
2003 unlink(tempfilename);
2006 if (sock_getln(sock, buf, sizeof buf) < 0) {
2008 unlink(tempfilename);
2012 if (buf[0] == '6') {
2013 plen = extract_int(&buf[4], 0);
2014 StrBuf *pbuf = NewStrBuf();
2015 if (socket_read_blob(sock, pbuf, plen, CLIENT_TIMEOUT) != plen) {
2016 syslog(LOG_INFO, "Short read from peer; aborting.\n");
2018 unlink(tempfilename);
2022 fwrite(ChrPtr(pbuf), plen, 1, fp);
2023 bytes_received += plen;
2030 /* Last chance for shutdown exit */
2031 if (server_shutting_down)
2033 unlink(tempfilename);
2037 if (sock_puts(sock, "CLOS") < 0) {
2038 unlink(tempfilename);
2043 * From here on we must complete or messages will get lost
2045 if (sock_getln(sock, buf, sizeof buf) < 0) {
2046 unlink(tempfilename);
2050 syslog(LOG_DEBUG, "%s\n", buf);
2053 * Now move the temp file to its permanent location.
2055 if (link(tempfilename, permfilename) != 0) {
2056 syslog(LOG_ALERT, "Could not link %s to %s: %s\n",
2057 tempfilename, permfilename, strerror(errno)
2061 unlink(tempfilename);
2067 * transmit network spool to the remote system
2069 void transmit_spool(int *sock, char *remote_nodename)
2074 long bytes_to_write, thisblock, bytes_written;
2078 if (sock_puts(sock, "NUOP") < 0) return;
2079 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2080 syslog(LOG_DEBUG, "<%s\n", buf);
2081 if (buf[0] != '2') {
2085 snprintf(sfname, sizeof sfname,
2090 fd = open(sfname, O_RDONLY);
2092 if (errno != ENOENT) {
2093 syslog(LOG_CRIT, "cannot open %s: %s\n", sfname, strerror(errno));
2098 while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
2099 bytes_to_write = plen;
2100 while (bytes_to_write > 0L) {
2101 /* Exit if shutting down */
2102 if (server_shutting_down)
2108 snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
2109 if (sock_puts(sock, buf) < 0) {
2113 if (sock_getln(sock, buf, sizeof buf) < 0) {
2117 thisblock = atol(&buf[4]);
2118 if (buf[0] == '7') {
2119 if (sock_write(sock, pbuf, (int) thisblock) < 0) {
2123 bytes_to_write -= thisblock;
2124 bytes_written += thisblock;
2134 /* Last chance for shutdown exit */
2135 if(server_shutting_down)
2138 if (sock_puts(sock, "UCLS 1") < 0) return;
2141 * From here on we must complete or messages will get lost
2143 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2144 syslog(LOG_NOTICE, "Sent %ld octets to <%s>\n", bytes_written, remote_nodename);
2145 syslog(LOG_DEBUG, "<%s\n", buf);
2146 if (buf[0] == '2') {
2147 syslog(LOG_DEBUG, "Removing <%s>\n", sfname);
2155 * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
2157 void network_poll_node(char *node, char *secret, char *host, char *port) {
2161 char connected_to[SIZ];
2164 if (network_talking_to(node, NTT_CHECK)) return;
2165 network_talking_to(node, NTT_ADD);
2166 syslog(LOG_DEBUG, "network: polling <%s>\n", node);
2167 syslog(LOG_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
2169 sock = sock_connect(host, port);
2171 syslog(LOG_ERR, "Could not connect: %s\n", strerror(errno));
2172 network_talking_to(node, NTT_REMOVE);
2176 syslog(LOG_DEBUG, "Connected!\n");
2177 CCC->SBuf.Buf = NewStrBuf();
2178 CCC->sMigrateBuf = NewStrBuf();
2179 CCC->SBuf.ReadWritePointer = NULL;
2181 /* Read the server greeting */
2182 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2183 syslog(LOG_DEBUG, ">%s\n", buf);
2185 /* Check that the remote is who we think it is and warn the Aide if not */
2186 extract_token (connected_to, buf, 1, ' ', sizeof connected_to);
2187 if (strcmp(connected_to, node))
2189 snprintf(err_buf, sizeof(err_buf),
2190 "Connected to node \"%s\" but I was expecting to connect to node \"%s\".",
2193 syslog(LOG_ERR, "%s\n", err_buf);
2194 CtdlAideMessage(err_buf, "Network error");
2197 /* We're talking to the correct node. Now identify ourselves. */
2198 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
2199 syslog(LOG_DEBUG, "<%s\n", buf);
2200 if (sock_puts(&sock, buf) <0) goto bail;
2201 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2202 syslog(LOG_DEBUG, ">%s\n", buf);
2203 if (buf[0] != '2') {
2207 /* At this point we are authenticated. */
2208 if (!server_shutting_down)
2209 receive_spool(&sock, node);
2210 if (!server_shutting_down)
2211 transmit_spool(&sock, node);
2214 sock_puts(&sock, "QUIT");
2216 FreeStrBuf(&CCC->SBuf.Buf);
2217 FreeStrBuf(&CCC->sMigrateBuf);
2220 network_talking_to(node, NTT_REMOVE);
2226 * Poll other Citadel nodes and transfer inbound/outbound network data.
2227 * Set "full" to nonzero to force a poll of every node, or to zero to poll
2228 * only nodes to which we have data to send.
2230 void network_poll_other_citadel_nodes(int full_poll) {
2238 char spoolfile[256];
2240 if (working_ignetcfg == NULL) {
2241 syslog(LOG_DEBUG, "network: no neighbor nodes are configured - not polling.\n");
2245 /* Use the string tokenizer to grab one line at a time */
2246 for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2247 if(server_shutting_down)
2249 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2250 extract_token(node, linebuf, 0, '|', sizeof node);
2251 extract_token(secret, linebuf, 1, '|', sizeof secret);
2252 extract_token(host, linebuf, 2, '|', sizeof host);
2253 extract_token(port, linebuf, 3, '|', sizeof port);
2254 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2255 && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2264 if (access(spoolfile, R_OK) == 0) {
2269 network_poll_node(node, secret, host, port);
2280 * It's ok if these directories already exist. Just fail silently.
2282 void create_spool_dirs(void) {
2283 if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
2284 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
2285 if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
2286 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
2287 if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
2288 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
2289 if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
2290 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
2291 if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
2292 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2293 if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
2294 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2295 if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
2296 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
2297 if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
2298 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
2306 * network_do_queue()
2308 * Run through the rooms doing various types of network stuff.
2310 void network_do_queue(void) {
2311 static int doing_queue = 0;
2312 static time_t last_run = 0L;
2313 struct RoomProcList *ptr;
2314 int full_processing = 1;
2317 * Run the full set of processing tasks no more frequently
2318 * than once every n seconds
2320 if ( (time(NULL) - last_run) < config.c_net_freq ) {
2321 full_processing = 0;
2322 syslog(LOG_DEBUG, "Network full processing in %ld seconds.\n",
2323 config.c_net_freq - (time(NULL)- last_run)
2328 * This is a simple concurrency check to make sure only one queue run
2329 * is done at a time. We could do this with a mutex, but since we
2330 * don't really require extremely fine granularity here, we'll do it
2331 * with a static variable instead.
2338 /* Load the IGnet Configuration into memory */
2339 load_working_ignetcfg();
2342 * Poll other Citadel nodes. Maybe. If "full_processing" is set
2343 * then we poll everyone. Otherwise we only poll nodes we have stuff
2346 network_poll_other_citadel_nodes(full_processing);
2349 * Load the network map and filter list into memory.
2352 filterlist = load_filter_list();
2355 * Go ahead and run the queue
2357 if (full_processing && !server_shutting_down) {
2358 syslog(LOG_DEBUG, "network: loading outbound queue\n");
2359 CtdlForEachRoom(network_queue_room, NULL);
2362 if (rplist != NULL) {
2363 syslog(LOG_DEBUG, "network: running outbound queue\n");
2364 while (rplist != NULL && !server_shutting_down) {
2365 char spoolroomname[ROOMNAMELEN];
2366 safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2367 begin_critical_section(S_RPLIST);
2369 /* pop this record off the list */
2371 rplist = rplist->next;
2374 /* invalidate any duplicate entries to prevent double processing */
2375 for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2376 if (!strcasecmp(ptr->name, spoolroomname)) {
2381 end_critical_section(S_RPLIST);
2382 if (spoolroomname[0] != 0) {
2383 network_spoolout_room(spoolroomname);
2388 /* If there is anything in the inbound queue, process it */
2389 if (!server_shutting_down) {
2390 network_do_spoolin();
2393 /* Save the network map back to disk */
2394 write_network_map();
2396 /* Free the filter list in memory */
2397 free_filter_list(filterlist);
2400 network_consolidate_spoolout();
2402 syslog(LOG_DEBUG, "network: queue run completed\n");
2404 if (full_processing) {
2405 last_run = time(NULL);
2413 * cmd_netp() - authenticate to the server as another Citadel node polling
2414 * for network traffic
2416 void cmd_netp(char *cmdbuf)
2427 extract_token(node, cmdbuf, 0, '|', sizeof node);
2428 extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2430 /* load the IGnet Configuration to check node validity */
2431 load_working_ignetcfg();
2432 v = is_valid_node(nexthop, secret, node);
2435 snprintf(err_buf, sizeof err_buf,
2436 "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
2437 node, CC->cs_host, CC->cs_addr
2439 syslog(LOG_WARNING, "%s", err_buf);
2440 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2441 CtdlAideMessage(err_buf, "IGNet Networking.");
2445 if (strcasecmp(pass, secret)) {
2446 snprintf(err_buf, sizeof err_buf,
2447 "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
2448 CC->cs_host, CC->cs_addr, node
2450 syslog(LOG_WARNING, "%s", err_buf);
2451 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2452 CtdlAideMessage(err_buf, "IGNet Networking.");
2456 if (network_talking_to(node, NTT_CHECK)) {
2457 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
2458 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2462 safestrncpy(CC->net_node, node, sizeof CC->net_node);
2463 network_talking_to(node, NTT_ADD);
2464 syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
2465 CC->net_node, CC->cs_host, CC->cs_addr
2467 cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
2471 int network_room_handler (struct ctdlroom *room)
2473 network_queue_room(room, NULL);
2479 * Module entry point
2481 CTDL_MODULE_INIT(network)
2485 create_spool_dirs();
2486 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2487 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2488 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2489 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2490 CtdlRegisterRoomHook(network_room_handler);
2491 CtdlRegisterCleanupHook(destroy_network_queue_room);
2492 CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);