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);
684 StrBuf *Subject, *FlatSubject;
686 if (msg->cm_fields['V'] == NULL){
687 /* local message, no enVelope */
690 StrBufAppendBufPlain(Buf, msg->cm_fields['O'], -1, 0);
691 StrBufAppendBufPlain(Buf, HKEY("@"), 0);
692 StrBufAppendBufPlain(Buf, config.c_fqdn, -1, 0);
694 msg->cm_fields['K'] = SmashStrBuf(&Buf);
697 msg->cm_fields['K'] = strdup (msg->cm_fields['V']);
699 /* Set the 'List-ID' header */
700 if (msg->cm_fields['L'] != NULL) {
701 free(msg->cm_fields['L']);
703 msg->cm_fields['L'] = malloc(1024);
704 snprintf(msg->cm_fields['L'], 1024,
705 "%s <%ld.list-id.%s>",
711 /* Prepend "[List name]" to the subject */
712 if (msg->cm_fields['U'] == NULL) {
713 Subject = NewStrBufPlain(HKEY("(no subject)"));
716 Subject = NewStrBufPlain(msg->cm_fields['U'], -1);
718 FlatSubject = NewStrBufPlain(NULL, StrLength(Subject));
719 StrBuf_RFC822_to_Utf8(FlatSubject, Subject, NULL, NULL);
721 rlen = strlen(CC->room.QRname);
722 pCh = strstr(ChrPtr(FlatSubject), CC->room.QRname);
724 (*(pCh + rlen) != ']') ||
725 (pCh == ChrPtr(FlatSubject)) ||
730 StrBufPlain(Subject, HKEY("["));
731 StrBufAppendBufPlain(Subject, CC->room.QRname, rlen, 0);
732 StrBufAppendBufPlain(Subject, HKEY("] "), 0);
733 StrBufAppendBuf(Subject, FlatSubject, 0);
734 tmp = Subject; Subject = FlatSubject; FlatSubject = tmp; /* so we can free the right one... */
735 StrBufRFC2047encode(&Subject, FlatSubject);
738 if (msg->cm_fields['U'] != NULL)
739 free (msg->cm_fields['U']);
740 msg->cm_fields['U'] = SmashStrBuf(&Subject);
742 FreeStrBuf(&FlatSubject);
744 /* else we won't modify the buffer, since the roomname is already here. */
746 /* if we don't already have a 'reply to' field, put our roomname in. */
747 if (msg->cm_fields['K'] == NULL) {
748 msg->cm_fields['K'] = malloc(256);
749 snprintf(msg->cm_fields['K'], 256,
750 "room_%s@%s", CC->room.QRname,
752 for (i=0; msg->cm_fields['K'][i]; ++i) {
753 if (isspace(msg->cm_fields['K'][i])) {
754 msg->cm_fields['K'][i] = '_';
759 /* Handle delivery */
760 network_deliver_list(msg, sc);
761 CtdlFreeMessage(msg);
766 * Process digest recipients
768 if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
769 msg = CtdlFetchMessage(msgnum, 1);
771 fprintf(sc->digestfp, " -----------------------------------"
772 "------------------------------------"
774 fprintf(sc->digestfp, "From: ");
775 if (msg->cm_fields['A'] != NULL) {
776 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
778 if (msg->cm_fields['F'] != NULL) {
779 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
781 else if (msg->cm_fields['N'] != NULL) {
782 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
784 fprintf(sc->digestfp, "\n");
785 if (msg->cm_fields['U'] != NULL) {
786 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
789 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
791 safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
792 CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
794 StrBufTrim(CC->redirect_buffer);
795 fwrite(HKEY("\n"), 1, sc->digestfp);
796 fwrite(SKEY(CC->redirect_buffer), 1, sc->digestfp);
797 fwrite(HKEY("\n"), 1, sc->digestfp);
799 FreeStrBuf(&CC->redirect_buffer);
801 sc->num_msgs_spooled += 1;
807 * Process client-side list participations for this room
810 if (sc->participates != NULL) {
811 msg = CtdlFetchMessage(msgnum, 1);
814 /* Only send messages which originated on our own Citadel
815 * network, otherwise we'll end up sending the remote
816 * mailing list's messages back to it, which is rude...
818 ok_to_participate = 0;
819 if (msg->cm_fields['N'] != NULL) {
820 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
821 ok_to_participate = 1;
823 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
824 ok_to_participate = 1;
827 if (ok_to_participate) {
828 if (msg->cm_fields['F'] != NULL) {
829 free(msg->cm_fields['F']);
831 msg->cm_fields['F'] = malloc(SIZ);
832 /* Replace the Internet email address of the actual
833 * author with the email address of the room itself,
834 * so the remote listserv doesn't reject us.
835 * FIXME ... I want to be able to pick any address
837 snprintf(msg->cm_fields['F'], SIZ,
838 "room_%s@%s", CC->room.QRname,
840 for (i=0; msg->cm_fields['F'][i]; ++i) {
841 if (isspace(msg->cm_fields['F'][i])) {
842 msg->cm_fields['F'][i] = '_';
847 * Figure out how big a buffer we need to allocate
849 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
851 if (msg->cm_fields['R'] == NULL) {
852 free(msg->cm_fields['R']);
854 msg->cm_fields['R'] = strdup(nptr->name);
856 valid = validate_recipients(nptr->name, NULL, 0);
857 CtdlSubmitMsg(msg, valid, "", 0);
858 free_recipients(valid);
862 CtdlFreeMessage(msg);
867 * Process IGnet push shares
869 msg = CtdlFetchMessage(msgnum, 1);
873 /* Prepend our node name to the Path field whenever
874 * sending a message to another IGnet node
876 if (msg->cm_fields['P'] == NULL) {
877 msg->cm_fields['P'] = strdup("username");
879 newpath_len = strlen(msg->cm_fields['P']) +
880 strlen(config.c_nodename) + 2;
881 newpath = malloc(newpath_len);
882 snprintf(newpath, newpath_len, "%s!%s",
883 config.c_nodename, msg->cm_fields['P']);
884 free(msg->cm_fields['P']);
885 msg->cm_fields['P'] = newpath;
888 * Determine if this message is set to be deleted
889 * after sending out on the network
891 if (msg->cm_fields['S'] != NULL) {
892 if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
893 delete_after_send = 1;
897 /* Now send it to every node */
898 if (sc->ignet_push_shares != NULL)
899 for (mptr = sc->ignet_push_shares; mptr != NULL;
904 /* Check for valid node name */
905 if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
906 syslog(LOG_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
910 /* Check for split horizon */
911 syslog(LOG_DEBUG, "Path is %s\n", msg->cm_fields['P']);
912 bang = num_tokens(msg->cm_fields['P'], '!');
913 if (bang > 1) for (i=0; i<(bang-1); ++i) {
914 extract_token(buf, msg->cm_fields['P'], i, '!', sizeof buf);
915 syslog(LOG_DEBUG, "Compare <%s> to <%s>\n",
916 buf, mptr->remote_nodename) ;
917 if (!strcasecmp(buf, mptr->remote_nodename)) {
919 syslog(LOG_DEBUG, "Not sending to %s\n",
920 mptr->remote_nodename);
923 syslog(LOG_DEBUG, "Sending to %s\n", mptr->remote_nodename);
927 /* Send the message */
931 * Force the message to appear in the correct room
932 * on the far end by setting the C field correctly
934 if (msg->cm_fields['C'] != NULL) {
935 free(msg->cm_fields['C']);
937 if (!IsEmptyStr(mptr->remote_roomname)) {
938 msg->cm_fields['C'] = strdup(mptr->remote_roomname);
941 msg->cm_fields['C'] = strdup(CC->room.QRname);
944 /* serialize it for transmission */
945 serialize_message(&sermsg, msg);
946 if (sermsg.len > 0) {
948 /* write it to a spool file */
949 snprintf(filename, sizeof filename,"%s/%s@%lx%x",
951 mptr->remote_nodename,
955 syslog(LOG_DEBUG, "Appending to %s\n", filename);
956 fp = fopen(filename, "ab");
963 syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
966 /* free the serialized version */
972 CtdlFreeMessage(msg);
975 /* update lastsent */
976 sc->lastsent = msgnum;
978 /* Delete this message if delete-after-send is set */
979 if (delete_after_send) {
980 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
986 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
992 char roomname[ROOMNAMELEN];
995 int skipthisline = 0;
996 namelist *nptr = NULL;
997 maplist *mptr = NULL;
1000 fp = fopen(filename, "r");
1004 sc = malloc(sizeof(SpoolControl));
1005 memset(sc, 0, sizeof(SpoolControl));
1008 while (fgets(buf, sizeof buf, fp) != NULL) {
1009 buf[strlen(buf)-1] = 0;
1011 extract_token(instr, buf, 0, '|', sizeof instr);
1012 if (!strcasecmp(instr, strof(lastsent))) {
1013 sc->lastsent = extract_long(buf, 1);
1015 else if (!strcasecmp(instr, strof(listrecp))) {
1017 malloc(sizeof(namelist));
1018 nptr->next = sc->listrecps;
1019 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1020 sc->listrecps = nptr;
1022 else if (!strcasecmp(instr, strof(participate))) {
1024 malloc(sizeof(namelist));
1025 nptr->next = sc->participates;
1026 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1027 sc->participates = nptr;
1029 else if (!strcasecmp(instr, strof(digestrecp))) {
1031 malloc(sizeof(namelist));
1032 nptr->next = sc->digestrecps;
1033 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1034 sc->digestrecps = nptr;
1036 else if (!strcasecmp(instr, strof(ignet_push_share))) {
1037 extract_token(nodename, buf, 1, '|', sizeof nodename);
1038 extract_token(roomname, buf, 2, '|', sizeof roomname);
1039 mptr = (maplist *) malloc(sizeof(maplist));
1040 mptr->next = sc->ignet_push_shares;
1041 strcpy(mptr->remote_nodename, nodename);
1042 strcpy(mptr->remote_roomname, roomname);
1043 sc->ignet_push_shares = mptr;
1046 /* Preserve 'other' lines ... *unless* they happen to
1047 * be subscribe/unsubscribe pendings with expired
1051 if (!strncasecmp(buf, strof(subpending)"|", 11)) {
1052 if (time(NULL) - extract_long(buf, 4) > EXP) {
1056 if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
1057 if (time(NULL) - extract_long(buf, 3) > EXP) {
1062 if (skipthisline == 0) {
1063 linesize = strlen(buf);
1064 sc->misc = realloc(sc->misc,
1065 (miscsize + linesize + 2) );
1066 sprintf(&sc->misc[miscsize], "%s\n", buf);
1067 miscsize = miscsize + linesize + 1;
1077 void free_spoolcontrol_struct(SpoolControl **scc)
1080 namelist *nptr = NULL;
1081 maplist *mptr = NULL;
1084 while (sc->listrecps != NULL) {
1085 nptr = sc->listrecps->next;
1086 free(sc->listrecps);
1087 sc->listrecps = nptr;
1089 /* Do the same for digestrecps */
1090 while (sc->digestrecps != NULL) {
1091 nptr = sc->digestrecps->next;
1092 free(sc->digestrecps);
1093 sc->digestrecps = nptr;
1095 /* Do the same for participates */
1096 while (sc->participates != NULL) {
1097 nptr = sc->participates->next;
1098 free(sc->participates);
1099 sc->participates = nptr;
1101 while (sc->ignet_push_shares != NULL) {
1102 mptr = sc->ignet_push_shares->next;
1103 free(sc->ignet_push_shares);
1104 sc->ignet_push_shares = mptr;
1111 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
1113 char tempfilename[PATH_MAX];
1116 namelist *nptr = NULL;
1117 maplist *mptr = NULL;
1121 long reltid; /* if we don't have SYS_gettid, use "random" value */
1125 len = strlen(filename);
1126 memcpy(tempfilename, filename, len + 1);
1129 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
1130 reltid = syscall(SYS_gettid);
1132 gettimeofday(&tv, NULL);
1133 /* Promote to time_t; types differ on some OSes (like darwin) */
1134 unixtime = tv.tv_sec;
1136 sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
1139 TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
1141 if ((TmpFD < 0) || (errno != 0)) {
1142 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
1143 filename, strerror(errno));
1144 free_spoolcontrol_struct(scc);
1145 unlink(tempfilename);
1148 fchown(TmpFD, config.c_ctdluid, 0);
1149 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
1151 /* Write out the listrecps while freeing from memory at the
1152 * same time. Am I clever or what? :)
1154 while (sc->listrecps != NULL) {
1155 StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
1156 nptr = sc->listrecps->next;
1157 free(sc->listrecps);
1158 sc->listrecps = nptr;
1160 /* Do the same for digestrecps */
1161 while (sc->digestrecps != NULL) {
1162 StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
1163 nptr = sc->digestrecps->next;
1164 free(sc->digestrecps);
1165 sc->digestrecps = nptr;
1167 /* Do the same for participates */
1168 while (sc->participates != NULL) {
1169 StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
1170 nptr = sc->participates->next;
1171 free(sc->participates);
1172 sc->participates = nptr;
1174 while (sc->ignet_push_shares != NULL) {
1175 StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1176 if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1177 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
1179 StrBufAppendPrintf(Cfg, "\n");
1180 mptr = sc->ignet_push_shares->next;
1181 free(sc->ignet_push_shares);
1182 sc->ignet_push_shares = mptr;
1184 if (sc->misc != NULL) {
1185 StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
1189 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
1190 if ((rc >=0 ) && (rc == StrLength(Cfg)))
1193 rename(tempfilename, filename);
1197 "unable to write %s; [%s]; not enough space on the disk?\n",
1201 unlink(tempfilename);
1209 int is_recipient(SpoolControl *sc, const char *Name)
1215 nptr = sc->listrecps;
1216 while (nptr != NULL) {
1217 if (strncmp(Name, nptr->name, len)==0)
1221 /* Do the same for digestrecps */
1222 nptr = sc->digestrecps;
1223 while (nptr != NULL) {
1224 if (strncmp(Name, nptr->name, len)==0)
1228 /* Do the same for participates */
1229 nptr = sc->participates;
1230 while (nptr != NULL) {
1231 if (strncmp(Name, nptr->name, len)==0)
1240 * Batch up and send all outbound traffic from the current room
1242 void network_spoolout_room(char *room_to_spool) {
1244 char filename[PATH_MAX];
1249 * If the room doesn't exist, don't try to perform its networking tasks.
1250 * Normally this should never happen, but once in a while maybe a room gets
1251 * queued for networking and then deleted before it can happen.
1253 if (CtdlGetRoom(&CC->room, room_to_spool) != 0) {
1254 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1258 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1259 begin_critical_section(S_NETCONFIGS);
1261 /* Only do net processing for rooms that have netconfigs */
1262 if (!read_spoolcontrol_file(&sc, filename))
1264 end_critical_section(S_NETCONFIGS);
1267 syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
1269 /* If there are digest recipients, we have to build a digest */
1270 if (sc->digestrecps != NULL) {
1271 sc->digestfp = tmpfile();
1272 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1275 /* Do something useful */
1276 CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1277 network_spool_msg, sc);
1279 /* If we wrote a digest, deliver it and then close it */
1280 snprintf(buf, sizeof buf, "room_%s@%s",
1281 CC->room.QRname, config.c_fqdn);
1282 for (i=0; buf[i]; ++i) {
1283 buf[i] = tolower(buf[i]);
1284 if (isspace(buf[i])) buf[i] = '_';
1286 if (sc->digestfp != NULL) {
1287 fprintf(sc->digestfp, " -----------------------------------"
1288 "------------------------------------"
1290 "You are subscribed to the '%s' "
1292 "To post to the list: %s\n",
1293 CC->room.QRname, buf
1295 network_deliver_digest(sc); /* deliver and close */
1298 /* Now rewrite the config file */
1299 writenfree_spoolcontrol_file(&sc, filename);
1300 end_critical_section(S_NETCONFIGS);
1306 * Send the *entire* contents of the current room to one specific network node,
1307 * ignoring anything we know about which messages have already undergone
1308 * network processing. This can be used to bring a new node into sync.
1310 int network_sync_to(char *target_node) {
1312 int num_spooled = 0;
1318 char filename[PATH_MAX];
1321 /* Grab the configuration line we're looking for */
1322 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1323 begin_critical_section(S_NETCONFIGS);
1324 fp = fopen(filename, "r");
1326 end_critical_section(S_NETCONFIGS);
1329 while (fgets(buf, sizeof buf, fp) != NULL) {
1330 buf[strlen(buf)-1] = 0;
1331 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1332 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1333 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1334 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1335 && (!strcasecmp(sc_node, target_node)) ) {
1338 /* Concise syntax because we don't need a full linked-list */
1339 memset(&sc, 0, sizeof(SpoolControl));
1340 sc.ignet_push_shares = (maplist *)
1341 malloc(sizeof(maplist));
1342 sc.ignet_push_shares->next = NULL;
1343 safestrncpy(sc.ignet_push_shares->remote_nodename,
1345 sizeof sc.ignet_push_shares->remote_nodename);
1346 safestrncpy(sc.ignet_push_shares->remote_roomname,
1348 sizeof sc.ignet_push_shares->remote_roomname);
1352 end_critical_section(S_NETCONFIGS);
1354 if (!found_node) return(-1);
1356 /* Send ALL messages */
1357 num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1358 network_spool_msg, &sc);
1360 /* Concise cleanup because we know there's only one node in the sc */
1361 free(sc.ignet_push_shares);
1363 syslog(LOG_NOTICE, "Synchronized %d messages to <%s>\n",
1364 num_spooled, target_node);
1365 return(num_spooled);
1370 * Implements the NSYN command
1372 void cmd_nsyn(char *argbuf) {
1374 char target_node[256];
1376 if (CtdlAccessCheck(ac_aide)) return;
1378 extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1379 num_spooled = network_sync_to(target_node);
1380 if (num_spooled >= 0) {
1381 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1384 cprintf("%d No such room/node share exists.\n",
1385 ERROR + ROOM_NOT_FOUND);
1392 * Batch up and send all outbound traffic from the current room
1394 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1395 struct RoomProcList *ptr;
1397 ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1398 if (ptr == NULL) return;
1400 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1401 begin_critical_section(S_RPLIST);
1404 end_critical_section(S_RPLIST);
1407 void destroy_network_queue_room(void)
1409 struct RoomProcList *cur, *p;
1410 NetMap *nmcur, *nmp;
1413 begin_critical_section(S_RPLIST);
1421 end_critical_section(S_RPLIST);
1424 while (nmcur != NULL)
1431 if (working_ignetcfg != NULL)
1432 free (working_ignetcfg);
1433 working_ignetcfg = NULL;
1438 * Learn topology from path fields
1440 void network_learn_topology(char *node, char *path) {
1444 strcpy(nexthop, "");
1446 if (num_tokens(path, '!') < 3) return;
1447 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1448 if (!strcasecmp(nmptr->nodename, node)) {
1449 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1450 nmptr->lastcontact = time(NULL);
1456 /* If we got here then it's not in the map, so add it. */
1457 nmptr = (NetMap *) malloc(sizeof (NetMap));
1458 strcpy(nmptr->nodename, node);
1459 nmptr->lastcontact = time(NULL);
1460 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1461 nmptr->next = the_netmap;
1470 * Bounce a message back to the sender
1472 void network_bounce(struct CtdlMessage *msg, char *reason) {
1473 char *oldpath = NULL;
1475 char bouncesource[SIZ];
1476 char recipient[SIZ];
1477 struct recptypes *valid = NULL;
1478 char force_room[ROOMNAMELEN];
1479 static int serialnum = 0;
1482 syslog(LOG_DEBUG, "entering network_bounce()\n");
1484 if (msg == NULL) return;
1486 snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1489 * Give it a fresh message ID
1491 if (msg->cm_fields['I'] != NULL) {
1492 free(msg->cm_fields['I']);
1494 snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1495 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1496 msg->cm_fields['I'] = strdup(buf);
1499 * FIXME ... right now we're just sending a bounce; we really want to
1500 * include the text of the bounced message.
1502 if (msg->cm_fields['M'] != NULL) {
1503 free(msg->cm_fields['M']);
1505 msg->cm_fields['M'] = strdup(reason);
1506 msg->cm_format_type = 0;
1509 * Turn the message around
1511 if (msg->cm_fields['R'] == NULL) {
1512 free(msg->cm_fields['R']);
1515 if (msg->cm_fields['D'] == NULL) {
1516 free(msg->cm_fields['D']);
1519 snprintf(recipient, sizeof recipient, "%s@%s",
1520 msg->cm_fields['A'], msg->cm_fields['N']);
1522 if (msg->cm_fields['A'] == NULL) {
1523 free(msg->cm_fields['A']);
1526 if (msg->cm_fields['N'] == NULL) {
1527 free(msg->cm_fields['N']);
1530 if (msg->cm_fields['U'] == NULL) {
1531 free(msg->cm_fields['U']);
1534 msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1535 msg->cm_fields['N'] = strdup(config.c_nodename);
1536 msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1538 /* prepend our node to the path */
1539 if (msg->cm_fields['P'] != NULL) {
1540 oldpath = msg->cm_fields['P'];
1541 msg->cm_fields['P'] = NULL;
1544 oldpath = strdup("unknown_user");
1546 size = strlen(oldpath) + SIZ;
1547 msg->cm_fields['P'] = malloc(size);
1548 snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1551 /* Now submit the message */
1552 valid = validate_recipients(recipient, NULL, 0);
1553 if (valid != NULL) if (valid->num_error != 0) {
1554 free_recipients(valid);
1557 if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1558 strcpy(force_room, config.c_aideroom);
1561 strcpy(force_room, "");
1563 if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1564 strcpy(force_room, config.c_aideroom);
1566 CtdlSubmitMsg(msg, valid, force_room, 0);
1569 if (valid != NULL) free_recipients(valid);
1570 CtdlFreeMessage(msg);
1571 syslog(LOG_DEBUG, "leaving network_bounce()\n");
1578 * Process a buffer containing a single message from a single file
1579 * from the inbound queue
1581 void network_process_buffer(char *buffer, long size) {
1582 struct CtdlMessage *msg = NULL;
1585 struct recptypes *recp = NULL;
1586 char target_room[ROOMNAMELEN];
1587 struct ser_ret sermsg;
1588 char *oldpath = NULL;
1589 char filename[PATH_MAX];
1592 unsigned char firstbyte;
1593 unsigned char lastbyte;
1595 syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
1597 /* Validate just a little bit. First byte should be FF and * last byte should be 00. */
1598 firstbyte = buffer[0];
1599 lastbyte = buffer[size-1];
1600 if ( (firstbyte != 255) || (lastbyte != 0) ) {
1601 syslog(LOG_ERR, "Corrupt message ignored. Length=%ld, firstbyte = %d, lastbyte = %d\n",
1602 size, firstbyte, lastbyte);
1606 /* Set default target room to trash */
1607 strcpy(target_room, TWITROOM);
1609 /* Load the message into memory */
1610 msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1611 memset(msg, 0, sizeof(struct CtdlMessage));
1612 msg->cm_magic = CTDLMESSAGE_MAGIC;
1613 msg->cm_anon_type = buffer[1];
1614 msg->cm_format_type = buffer[2];
1616 for (pos = 3; pos < size; ++pos) {
1617 field = buffer[pos];
1618 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1619 pos = pos + strlen(&buffer[(int)pos]);
1622 /* Check for message routing */
1623 if (msg->cm_fields['D'] != NULL) {
1624 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1626 /* route the message */
1627 strcpy(nexthop, "");
1628 if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1629 /* prepend our node to the path */
1630 if (msg->cm_fields['P'] != NULL) {
1631 oldpath = msg->cm_fields['P'];
1632 msg->cm_fields['P'] = NULL;
1635 oldpath = strdup("unknown_user");
1637 size = strlen(oldpath) + SIZ;
1638 msg->cm_fields['P'] = malloc(size);
1639 snprintf(msg->cm_fields['P'], size, "%s!%s",
1640 config.c_nodename, oldpath);
1643 /* serialize the message */
1644 serialize_message(&sermsg, msg);
1647 if (IsEmptyStr(nexthop)) {
1648 strcpy(nexthop, msg->cm_fields['D']);
1658 syslog(LOG_DEBUG, "Appending to %s\n", filename);
1659 fp = fopen(filename, "ab");
1661 fwrite(sermsg.ser, sermsg.len, 1, fp);
1665 syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
1668 CtdlFreeMessage(msg);
1672 else { /* invalid destination node name */
1675 "A message you sent could not be delivered due to an invalid destination node"
1676 " name. Please check the address and try sending the message again.\n");
1685 * Check to see if we already have a copy of this message, and
1686 * abort its processing if so. (We used to post a warning to Aide>
1687 * every time this happened, but the network is now so densely
1688 * connected that it's inevitable.)
1690 if (network_usetable(msg) != 0) {
1691 CtdlFreeMessage(msg);
1695 /* Learn network topology from the path */
1696 if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1697 network_learn_topology(msg->cm_fields['N'], msg->cm_fields['P']);
1700 /* Is the sending node giving us a very persuasive suggestion about
1701 * which room this message should be saved in? If so, go with that.
1703 if (msg->cm_fields['C'] != NULL) {
1704 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
1707 /* Otherwise, does it have a recipient? If so, validate it... */
1708 else if (msg->cm_fields['R'] != NULL) {
1709 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1710 if (recp != NULL) if (recp->num_error != 0) {
1712 "A message you sent could not be delivered due to an invalid address.\n"
1713 "Please check the address and try sending the message again.\n");
1715 free_recipients(recp);
1716 syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
1719 strcpy(target_room, ""); /* no target room if mail */
1722 /* Our last shot at finding a home for this message is to see if
1723 * it has the O field (Originating room) set.
1725 else if (msg->cm_fields['O'] != NULL) {
1726 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
1729 /* Strip out fields that are only relevant during transit */
1730 if (msg->cm_fields['D'] != NULL) {
1731 free(msg->cm_fields['D']);
1732 msg->cm_fields['D'] = NULL;
1734 if (msg->cm_fields['C'] != NULL) {
1735 free(msg->cm_fields['C']);
1736 msg->cm_fields['C'] = NULL;
1739 /* save the message into a room */
1740 if (PerformNetprocHooks(msg, target_room) == 0) {
1741 msg->cm_flags = CM_SKIP_HOOKS;
1742 CtdlSubmitMsg(msg, recp, target_room, 0);
1744 CtdlFreeMessage(msg);
1745 free_recipients(recp);
1750 * Process a single message from a single file from the inbound queue
1752 void network_process_message(FILE *fp, long msgstart, long msgend) {
1757 hold_pos = ftell(fp);
1758 size = msgend - msgstart + 1;
1759 buffer = malloc(size);
1760 if (buffer != NULL) {
1761 fseek(fp, msgstart, SEEK_SET);
1762 if (fread(buffer, size, 1, fp) > 0) {
1763 network_process_buffer(buffer, size);
1768 fseek(fp, hold_pos, SEEK_SET);
1773 * Process a single file from the inbound queue
1775 void network_process_file(char *filename) {
1777 long msgstart = (-1L);
1778 long msgend = (-1L);
1783 fp = fopen(filename, "rb");
1785 syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1789 fseek(fp, 0L, SEEK_END);
1790 syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1793 /* Look for messages in the data stream and break them out */
1794 while (ch = getc(fp), ch >= 0) {
1797 if (msgstart >= 0L) {
1798 msgend = msgcur - 1;
1799 network_process_message(fp, msgstart, msgend);
1807 msgend = msgcur - 1;
1808 if (msgstart >= 0L) {
1809 network_process_message(fp, msgstart, msgend);
1818 * Process anything in the inbound queue
1820 void network_do_spoolin(void) {
1823 struct stat statbuf;
1824 char filename[PATH_MAX];
1825 static time_t last_spoolin_mtime = 0L;
1828 * Check the spoolin directory's modification time. If it hasn't
1829 * been touched, we don't need to scan it.
1831 if (stat(ctdl_netin_dir, &statbuf)) return;
1832 if (statbuf.st_mtime == last_spoolin_mtime) {
1833 syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
1836 last_spoolin_mtime = statbuf.st_mtime;
1837 syslog(LOG_DEBUG, "network: processing inbound queue\n");
1840 * Ok, there's something interesting in there, so scan it.
1842 dp = opendir(ctdl_netin_dir);
1843 if (dp == NULL) return;
1845 while (d = readdir(dp), d != NULL) {
1846 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1853 network_process_file(filename);
1861 * Step 1: consolidate files in the outbound queue into one file per neighbor node
1862 * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
1864 void network_consolidate_spoolout(void) {
1867 char filename[PATH_MAX];
1873 /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
1874 dp = opendir(ctdl_netout_dir);
1875 if (dp == NULL) return;
1876 while (d = readdir(dp), d != NULL) {
1878 (strcmp(d->d_name, "."))
1879 && (strcmp(d->d_name, ".."))
1880 && (strchr(d->d_name, '@') != NULL)
1882 safestrncpy(nexthop, d->d_name, sizeof nexthop);
1883 ptr = strchr(nexthop, '@');
1893 syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
1894 if (network_talking_to(nexthop, NTT_CHECK)) {
1896 "Currently online with %s - skipping for now\n",
1901 network_talking_to(nexthop, NTT_ADD);
1902 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
1904 ctdl_netout_dir, nexthop,
1908 network_talking_to(nexthop, NTT_REMOVE);
1914 /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1916 dp = opendir(ctdl_netout_dir);
1917 if (dp == NULL) return;
1919 while (d = readdir(dp), d != NULL) {
1920 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1922 ptr = strchr(d->d_name, '@');
1932 strcpy(nexthop, "");
1933 i = is_valid_node(nexthop, NULL, d->d_name);
1935 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1946 * receive network spool from the remote system
1948 void receive_spool(int *sock, char *remote_nodename) {
1949 int download_len = 0L;
1950 int bytes_received = 0L;
1952 char tempfilename[PATH_MAX];
1953 char permfilename[PATH_MAX];
1957 snprintf(tempfilename,
1958 sizeof tempfilename,
1966 snprintf(permfilename,
1967 sizeof permfilename,
1975 if (sock_puts(sock, "NDOP") < 0) return;
1976 if (sock_getln(sock, buf, sizeof buf) < 0) return;
1977 syslog(LOG_DEBUG, "<%s\n", buf);
1978 if (buf[0] != '2') {
1982 download_len = extract_long(&buf[4], 0);
1983 if (download_len <= 0) {
1987 bytes_received = 0L;
1988 fp = fopen(tempfilename, "w");
1990 syslog(LOG_CRIT, "Cannot create %s: %s\n", tempfilename, strerror(errno));
1994 syslog(LOG_DEBUG, "Expecting to transfer %d bytes\n", download_len);
1995 while (bytes_received < download_len) {
1997 * If shutting down we can exit here and unlink the temp file.
1998 * this shouldn't loose us any messages.
2000 if (server_shutting_down)
2003 unlink(tempfilename);
2006 snprintf(buf, sizeof buf, "READ %d|%d",
2008 ((download_len - bytes_received > IGNET_PACKET_SIZE)
2009 ? IGNET_PACKET_SIZE : (download_len - bytes_received))
2012 if (sock_puts(sock, buf) < 0) {
2014 unlink(tempfilename);
2017 if (sock_getln(sock, buf, sizeof buf) < 0) {
2019 unlink(tempfilename);
2023 if (buf[0] == '6') {
2024 plen = extract_int(&buf[4], 0);
2025 StrBuf *pbuf = NewStrBuf();
2026 if (socket_read_blob(sock, pbuf, plen, CLIENT_TIMEOUT) != plen) {
2027 syslog(LOG_INFO, "Short read from peer; aborting.\n");
2029 unlink(tempfilename);
2033 fwrite(ChrPtr(pbuf), plen, 1, fp);
2034 bytes_received += plen;
2041 /* Last chance for shutdown exit */
2042 if (server_shutting_down)
2044 unlink(tempfilename);
2048 if (sock_puts(sock, "CLOS") < 0) {
2049 unlink(tempfilename);
2054 * From here on we must complete or messages will get lost
2056 if (sock_getln(sock, buf, sizeof buf) < 0) {
2057 unlink(tempfilename);
2061 syslog(LOG_DEBUG, "%s\n", buf);
2064 * Now move the temp file to its permanent location.
2066 if (link(tempfilename, permfilename) != 0) {
2067 syslog(LOG_ALERT, "Could not link %s to %s: %s\n",
2068 tempfilename, permfilename, strerror(errno)
2072 unlink(tempfilename);
2078 * transmit network spool to the remote system
2080 void transmit_spool(int *sock, char *remote_nodename)
2085 long bytes_to_write, thisblock, bytes_written;
2089 if (sock_puts(sock, "NUOP") < 0) return;
2090 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2091 syslog(LOG_DEBUG, "<%s\n", buf);
2092 if (buf[0] != '2') {
2096 snprintf(sfname, sizeof sfname,
2101 fd = open(sfname, O_RDONLY);
2103 if (errno != ENOENT) {
2104 syslog(LOG_CRIT, "cannot open %s: %s\n", sfname, strerror(errno));
2109 while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
2110 bytes_to_write = plen;
2111 while (bytes_to_write > 0L) {
2112 /* Exit if shutting down */
2113 if (server_shutting_down)
2119 snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
2120 if (sock_puts(sock, buf) < 0) {
2124 if (sock_getln(sock, buf, sizeof buf) < 0) {
2128 thisblock = atol(&buf[4]);
2129 if (buf[0] == '7') {
2130 if (sock_write(sock, pbuf, (int) thisblock) < 0) {
2134 bytes_to_write -= thisblock;
2135 bytes_written += thisblock;
2145 /* Last chance for shutdown exit */
2146 if(server_shutting_down)
2149 if (sock_puts(sock, "UCLS 1") < 0) return;
2152 * From here on we must complete or messages will get lost
2154 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2155 syslog(LOG_NOTICE, "Sent %ld octets to <%s>\n", bytes_written, remote_nodename);
2156 syslog(LOG_DEBUG, "<%s\n", buf);
2157 if (buf[0] == '2') {
2158 syslog(LOG_DEBUG, "Removing <%s>\n", sfname);
2166 * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
2168 void network_poll_node(char *node, char *secret, char *host, char *port) {
2172 char connected_to[SIZ];
2175 if (network_talking_to(node, NTT_CHECK)) return;
2176 network_talking_to(node, NTT_ADD);
2177 syslog(LOG_DEBUG, "network: polling <%s>\n", node);
2178 syslog(LOG_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
2180 sock = sock_connect(host, port);
2182 syslog(LOG_ERR, "Could not connect: %s\n", strerror(errno));
2183 network_talking_to(node, NTT_REMOVE);
2187 syslog(LOG_DEBUG, "Connected!\n");
2188 CCC->SBuf.Buf = NewStrBuf();
2189 CCC->sMigrateBuf = NewStrBuf();
2190 CCC->SBuf.ReadWritePointer = NULL;
2192 /* Read the server greeting */
2193 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2194 syslog(LOG_DEBUG, ">%s\n", buf);
2196 /* Check that the remote is who we think it is and warn the Aide if not */
2197 extract_token (connected_to, buf, 1, ' ', sizeof connected_to);
2198 if (strcmp(connected_to, node))
2200 snprintf(err_buf, sizeof(err_buf),
2201 "Connected to node \"%s\" but I was expecting to connect to node \"%s\".",
2204 syslog(LOG_ERR, "%s\n", err_buf);
2205 CtdlAideMessage(err_buf, "Network error");
2208 /* We're talking to the correct node. Now identify ourselves. */
2209 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
2210 syslog(LOG_DEBUG, "<%s\n", buf);
2211 if (sock_puts(&sock, buf) <0) goto bail;
2212 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2213 syslog(LOG_DEBUG, ">%s\n", buf);
2214 if (buf[0] != '2') {
2218 /* At this point we are authenticated. */
2219 if (!server_shutting_down)
2220 receive_spool(&sock, node);
2221 if (!server_shutting_down)
2222 transmit_spool(&sock, node);
2225 sock_puts(&sock, "QUIT");
2227 FreeStrBuf(&CCC->SBuf.Buf);
2228 FreeStrBuf(&CCC->sMigrateBuf);
2231 network_talking_to(node, NTT_REMOVE);
2237 * Poll other Citadel nodes and transfer inbound/outbound network data.
2238 * Set "full" to nonzero to force a poll of every node, or to zero to poll
2239 * only nodes to which we have data to send.
2241 void network_poll_other_citadel_nodes(int full_poll) {
2249 char spoolfile[256];
2251 if (working_ignetcfg == NULL) {
2252 syslog(LOG_DEBUG, "network: no neighbor nodes are configured - not polling.\n");
2256 /* Use the string tokenizer to grab one line at a time */
2257 for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2258 if(server_shutting_down)
2260 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2261 extract_token(node, linebuf, 0, '|', sizeof node);
2262 extract_token(secret, linebuf, 1, '|', sizeof secret);
2263 extract_token(host, linebuf, 2, '|', sizeof host);
2264 extract_token(port, linebuf, 3, '|', sizeof port);
2265 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2266 && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2275 if (access(spoolfile, R_OK) == 0) {
2280 network_poll_node(node, secret, host, port);
2291 * It's ok if these directories already exist. Just fail silently.
2293 void create_spool_dirs(void) {
2294 if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
2295 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
2296 if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
2297 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
2298 if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
2299 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
2300 if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
2301 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
2302 if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
2303 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2304 if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
2305 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2306 if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
2307 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
2308 if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
2309 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
2317 * network_do_queue()
2319 * Run through the rooms doing various types of network stuff.
2321 void network_do_queue(void) {
2322 static int doing_queue = 0;
2323 static time_t last_run = 0L;
2324 struct RoomProcList *ptr;
2325 int full_processing = 1;
2328 * Run the full set of processing tasks no more frequently
2329 * than once every n seconds
2331 if ( (time(NULL) - last_run) < config.c_net_freq ) {
2332 full_processing = 0;
2333 syslog(LOG_DEBUG, "Network full processing in %ld seconds.\n",
2334 config.c_net_freq - (time(NULL)- last_run)
2339 * This is a simple concurrency check to make sure only one queue run
2340 * is done at a time. We could do this with a mutex, but since we
2341 * don't really require extremely fine granularity here, we'll do it
2342 * with a static variable instead.
2349 /* Load the IGnet Configuration into memory */
2350 load_working_ignetcfg();
2353 * Poll other Citadel nodes. Maybe. If "full_processing" is set
2354 * then we poll everyone. Otherwise we only poll nodes we have stuff
2357 network_poll_other_citadel_nodes(full_processing);
2360 * Load the network map and filter list into memory.
2363 filterlist = load_filter_list();
2366 * Go ahead and run the queue
2368 if (full_processing && !server_shutting_down) {
2369 syslog(LOG_DEBUG, "network: loading outbound queue\n");
2370 CtdlForEachRoom(network_queue_room, NULL);
2373 if (rplist != NULL) {
2374 syslog(LOG_DEBUG, "network: running outbound queue\n");
2375 while (rplist != NULL && !server_shutting_down) {
2376 char spoolroomname[ROOMNAMELEN];
2377 safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2378 begin_critical_section(S_RPLIST);
2380 /* pop this record off the list */
2382 rplist = rplist->next;
2385 /* invalidate any duplicate entries to prevent double processing */
2386 for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2387 if (!strcasecmp(ptr->name, spoolroomname)) {
2392 end_critical_section(S_RPLIST);
2393 if (spoolroomname[0] != 0) {
2394 network_spoolout_room(spoolroomname);
2399 /* If there is anything in the inbound queue, process it */
2400 if (!server_shutting_down) {
2401 network_do_spoolin();
2404 /* Save the network map back to disk */
2405 write_network_map();
2407 /* Free the filter list in memory */
2408 free_filter_list(filterlist);
2411 network_consolidate_spoolout();
2413 syslog(LOG_DEBUG, "network: queue run completed\n");
2415 if (full_processing) {
2416 last_run = time(NULL);
2424 * cmd_netp() - authenticate to the server as another Citadel node polling
2425 * for network traffic
2427 void cmd_netp(char *cmdbuf)
2438 extract_token(node, cmdbuf, 0, '|', sizeof node);
2439 extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2441 /* load the IGnet Configuration to check node validity */
2442 load_working_ignetcfg();
2443 v = is_valid_node(nexthop, secret, node);
2446 snprintf(err_buf, sizeof err_buf,
2447 "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
2448 node, CC->cs_host, CC->cs_addr
2450 syslog(LOG_WARNING, "%s", err_buf);
2451 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2452 CtdlAideMessage(err_buf, "IGNet Networking.");
2456 if (strcasecmp(pass, secret)) {
2457 snprintf(err_buf, sizeof err_buf,
2458 "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
2459 CC->cs_host, CC->cs_addr, node
2461 syslog(LOG_WARNING, "%s", err_buf);
2462 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2463 CtdlAideMessage(err_buf, "IGNet Networking.");
2467 if (network_talking_to(node, NTT_CHECK)) {
2468 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
2469 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2473 safestrncpy(CC->net_node, node, sizeof CC->net_node);
2474 network_talking_to(node, NTT_ADD);
2475 syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
2476 CC->net_node, CC->cs_host, CC->cs_addr
2478 cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
2482 int network_room_handler (struct ctdlroom *room)
2484 network_queue_room(room, NULL);
2490 * Module entry point
2492 CTDL_MODULE_INIT(network)
2496 create_spool_dirs();
2497 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2498 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2499 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2500 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2501 CtdlRegisterRoomHook(network_room_handler);
2502 CtdlRegisterCleanupHook(destroy_network_queue_room);
2503 CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);