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 pCh = strstr(msg->cm_fields['U'], CC->room.QRname);
718 (*(pCh + len) != ']') ||
719 (pCh == msg->cm_fields['U']) ||
725 rlen = strlen(CC->room.QRname);
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. */
736 pBuff = malloc (rlen * sizeof(char));
738 snprintf(pBuff, rlen, "[%s] %s", CC->room.QRname, msg->cm_fields['U']);
739 free(msg->cm_fields['U']);
740 msg->cm_fields['U'] = pBuff;
742 /* else we won't modify the buffer, since the roomname is already here. */
744 /* if we don't already have a 'reply to' field, put our roomname in. */
745 if (msg->cm_fields['K'] == NULL) {
746 msg->cm_fields['K'] = malloc(256);
747 snprintf(msg->cm_fields['K'], 256,
748 "room_%s@%s", CC->room.QRname,
750 for (i=0; msg->cm_fields['K'][i]; ++i) {
751 if (isspace(msg->cm_fields['K'][i])) {
752 msg->cm_fields['K'][i] = '_';
757 /* Handle delivery */
758 network_deliver_list(msg, sc);
759 CtdlFreeMessage(msg);
764 * Process digest recipients
766 if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
767 msg = CtdlFetchMessage(msgnum, 1);
769 fprintf(sc->digestfp, " -----------------------------------"
770 "------------------------------------"
772 fprintf(sc->digestfp, "From: ");
773 if (msg->cm_fields['A'] != NULL) {
774 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
776 if (msg->cm_fields['F'] != NULL) {
777 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
779 else if (msg->cm_fields['N'] != NULL) {
780 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
782 fprintf(sc->digestfp, "\n");
783 if (msg->cm_fields['U'] != NULL) {
784 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
787 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
789 safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
790 CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
792 StrBufTrim(CC->redirect_buffer);
793 fwrite(HKEY("\n"), 1, sc->digestfp);
794 fwrite(SKEY(CC->redirect_buffer), 1, sc->digestfp);
795 fwrite(HKEY("\n"), 1, sc->digestfp);
797 FreeStrBuf(&CC->redirect_buffer);
799 sc->num_msgs_spooled += 1;
805 * Process client-side list participations for this room
808 if (sc->participates != NULL) {
809 msg = CtdlFetchMessage(msgnum, 1);
812 /* Only send messages which originated on our own Citadel
813 * network, otherwise we'll end up sending the remote
814 * mailing list's messages back to it, which is rude...
816 ok_to_participate = 0;
817 if (msg->cm_fields['N'] != NULL) {
818 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
819 ok_to_participate = 1;
821 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
822 ok_to_participate = 1;
825 if (ok_to_participate) {
826 if (msg->cm_fields['F'] != NULL) {
827 free(msg->cm_fields['F']);
829 msg->cm_fields['F'] = malloc(SIZ);
830 /* Replace the Internet email address of the actual
831 * author with the email address of the room itself,
832 * so the remote listserv doesn't reject us.
833 * FIXME ... I want to be able to pick any address
835 snprintf(msg->cm_fields['F'], SIZ,
836 "room_%s@%s", CC->room.QRname,
838 for (i=0; msg->cm_fields['F'][i]; ++i) {
839 if (isspace(msg->cm_fields['F'][i])) {
840 msg->cm_fields['F'][i] = '_';
845 * Figure out how big a buffer we need to allocate
847 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
849 if (msg->cm_fields['R'] == NULL) {
850 free(msg->cm_fields['R']);
852 msg->cm_fields['R'] = strdup(nptr->name);
854 valid = validate_recipients(nptr->name, NULL, 0);
855 CtdlSubmitMsg(msg, valid, "", 0);
856 free_recipients(valid);
860 CtdlFreeMessage(msg);
865 * Process IGnet push shares
867 msg = CtdlFetchMessage(msgnum, 1);
871 /* Prepend our node name to the Path field whenever
872 * sending a message to another IGnet node
874 if (msg->cm_fields['P'] == NULL) {
875 msg->cm_fields['P'] = strdup("username");
877 newpath_len = strlen(msg->cm_fields['P']) +
878 strlen(config.c_nodename) + 2;
879 newpath = malloc(newpath_len);
880 snprintf(newpath, newpath_len, "%s!%s",
881 config.c_nodename, msg->cm_fields['P']);
882 free(msg->cm_fields['P']);
883 msg->cm_fields['P'] = newpath;
886 * Determine if this message is set to be deleted
887 * after sending out on the network
889 if (msg->cm_fields['S'] != NULL) {
890 if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
891 delete_after_send = 1;
895 /* Now send it to every node */
896 if (sc->ignet_push_shares != NULL)
897 for (mptr = sc->ignet_push_shares; mptr != NULL;
902 /* Check for valid node name */
903 if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
904 syslog(LOG_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
908 /* Check for split horizon */
909 syslog(LOG_DEBUG, "Path is %s\n", msg->cm_fields['P']);
910 bang = num_tokens(msg->cm_fields['P'], '!');
911 if (bang > 1) for (i=0; i<(bang-1); ++i) {
912 extract_token(buf, msg->cm_fields['P'], i, '!', sizeof buf);
913 syslog(LOG_DEBUG, "Compare <%s> to <%s>\n",
914 buf, mptr->remote_nodename) ;
915 if (!strcasecmp(buf, mptr->remote_nodename)) {
917 syslog(LOG_DEBUG, "Not sending to %s\n",
918 mptr->remote_nodename);
921 syslog(LOG_DEBUG, "Sending to %s\n", mptr->remote_nodename);
925 /* Send the message */
929 * Force the message to appear in the correct room
930 * on the far end by setting the C field correctly
932 if (msg->cm_fields['C'] != NULL) {
933 free(msg->cm_fields['C']);
935 if (!IsEmptyStr(mptr->remote_roomname)) {
936 msg->cm_fields['C'] = strdup(mptr->remote_roomname);
939 msg->cm_fields['C'] = strdup(CC->room.QRname);
942 /* serialize it for transmission */
943 serialize_message(&sermsg, msg);
944 if (sermsg.len > 0) {
946 /* write it to a spool file */
947 snprintf(filename, sizeof filename,"%s/%s@%lx%x",
949 mptr->remote_nodename,
953 syslog(LOG_DEBUG, "Appending to %s\n", filename);
954 fp = fopen(filename, "ab");
961 syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
964 /* free the serialized version */
970 CtdlFreeMessage(msg);
973 /* update lastsent */
974 sc->lastsent = msgnum;
976 /* Delete this message if delete-after-send is set */
977 if (delete_after_send) {
978 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
984 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
990 char roomname[ROOMNAMELEN];
993 int skipthisline = 0;
994 namelist *nptr = NULL;
995 maplist *mptr = NULL;
998 fp = fopen(filename, "r");
1002 sc = malloc(sizeof(SpoolControl));
1003 memset(sc, 0, sizeof(SpoolControl));
1006 while (fgets(buf, sizeof buf, fp) != NULL) {
1007 buf[strlen(buf)-1] = 0;
1009 extract_token(instr, buf, 0, '|', sizeof instr);
1010 if (!strcasecmp(instr, strof(lastsent))) {
1011 sc->lastsent = extract_long(buf, 1);
1013 else if (!strcasecmp(instr, strof(listrecp))) {
1015 malloc(sizeof(namelist));
1016 nptr->next = sc->listrecps;
1017 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1018 sc->listrecps = nptr;
1020 else if (!strcasecmp(instr, strof(participate))) {
1022 malloc(sizeof(namelist));
1023 nptr->next = sc->participates;
1024 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1025 sc->participates = nptr;
1027 else if (!strcasecmp(instr, strof(digestrecp))) {
1029 malloc(sizeof(namelist));
1030 nptr->next = sc->digestrecps;
1031 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1032 sc->digestrecps = nptr;
1034 else if (!strcasecmp(instr, strof(ignet_push_share))) {
1035 extract_token(nodename, buf, 1, '|', sizeof nodename);
1036 extract_token(roomname, buf, 2, '|', sizeof roomname);
1037 mptr = (maplist *) malloc(sizeof(maplist));
1038 mptr->next = sc->ignet_push_shares;
1039 strcpy(mptr->remote_nodename, nodename);
1040 strcpy(mptr->remote_roomname, roomname);
1041 sc->ignet_push_shares = mptr;
1044 /* Preserve 'other' lines ... *unless* they happen to
1045 * be subscribe/unsubscribe pendings with expired
1049 if (!strncasecmp(buf, strof(subpending)"|", 11)) {
1050 if (time(NULL) - extract_long(buf, 4) > EXP) {
1054 if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
1055 if (time(NULL) - extract_long(buf, 3) > EXP) {
1060 if (skipthisline == 0) {
1061 linesize = strlen(buf);
1062 sc->misc = realloc(sc->misc,
1063 (miscsize + linesize + 2) );
1064 sprintf(&sc->misc[miscsize], "%s\n", buf);
1065 miscsize = miscsize + linesize + 1;
1075 void free_spoolcontrol_struct(SpoolControl **scc)
1078 namelist *nptr = NULL;
1079 maplist *mptr = NULL;
1082 while (sc->listrecps != NULL) {
1083 nptr = sc->listrecps->next;
1084 free(sc->listrecps);
1085 sc->listrecps = nptr;
1087 /* Do the same for digestrecps */
1088 while (sc->digestrecps != NULL) {
1089 nptr = sc->digestrecps->next;
1090 free(sc->digestrecps);
1091 sc->digestrecps = nptr;
1093 /* Do the same for participates */
1094 while (sc->participates != NULL) {
1095 nptr = sc->participates->next;
1096 free(sc->participates);
1097 sc->participates = nptr;
1099 while (sc->ignet_push_shares != NULL) {
1100 mptr = sc->ignet_push_shares->next;
1101 free(sc->ignet_push_shares);
1102 sc->ignet_push_shares = mptr;
1109 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
1111 char tempfilename[PATH_MAX];
1114 namelist *nptr = NULL;
1115 maplist *mptr = NULL;
1119 long reltid; /* if we don't have SYS_gettid, use "random" value */
1123 len = strlen(filename);
1124 memcpy(tempfilename, filename, len + 1);
1127 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
1128 reltid = syscall(SYS_gettid);
1130 gettimeofday(&tv, NULL);
1131 /* Promote to time_t; types differ on some OSes (like darwin) */
1132 unixtime = tv.tv_sec;
1134 sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
1137 TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
1139 if ((TmpFD < 0) || (errno != 0)) {
1140 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
1141 filename, strerror(errno));
1142 free_spoolcontrol_struct(scc);
1143 unlink(tempfilename);
1146 fchown(TmpFD, config.c_ctdluid, 0);
1147 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
1149 /* Write out the listrecps while freeing from memory at the
1150 * same time. Am I clever or what? :)
1152 while (sc->listrecps != NULL) {
1153 StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
1154 nptr = sc->listrecps->next;
1155 free(sc->listrecps);
1156 sc->listrecps = nptr;
1158 /* Do the same for digestrecps */
1159 while (sc->digestrecps != NULL) {
1160 StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
1161 nptr = sc->digestrecps->next;
1162 free(sc->digestrecps);
1163 sc->digestrecps = nptr;
1165 /* Do the same for participates */
1166 while (sc->participates != NULL) {
1167 StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
1168 nptr = sc->participates->next;
1169 free(sc->participates);
1170 sc->participates = nptr;
1172 while (sc->ignet_push_shares != NULL) {
1173 StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1174 if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1175 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
1177 StrBufAppendPrintf(Cfg, "\n");
1178 mptr = sc->ignet_push_shares->next;
1179 free(sc->ignet_push_shares);
1180 sc->ignet_push_shares = mptr;
1182 if (sc->misc != NULL) {
1183 StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
1187 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
1188 if ((rc >=0 ) && (rc == StrLength(Cfg)))
1191 rename(tempfilename, filename);
1195 "unable to write %s; [%s]; not enough space on the disk?\n",
1199 unlink(tempfilename);
1207 int is_recipient(SpoolControl *sc, const char *Name)
1213 nptr = sc->listrecps;
1214 while (nptr != NULL) {
1215 if (strncmp(Name, nptr->name, len)==0)
1219 /* Do the same for digestrecps */
1220 nptr = sc->digestrecps;
1221 while (nptr != NULL) {
1222 if (strncmp(Name, nptr->name, len)==0)
1226 /* Do the same for participates */
1227 nptr = sc->participates;
1228 while (nptr != NULL) {
1229 if (strncmp(Name, nptr->name, len)==0)
1238 * Batch up and send all outbound traffic from the current room
1240 void network_spoolout_room(char *room_to_spool) {
1242 char filename[PATH_MAX];
1247 * If the room doesn't exist, don't try to perform its networking tasks.
1248 * Normally this should never happen, but once in a while maybe a room gets
1249 * queued for networking and then deleted before it can happen.
1251 if (CtdlGetRoom(&CC->room, room_to_spool) != 0) {
1252 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1256 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1257 begin_critical_section(S_NETCONFIGS);
1259 /* Only do net processing for rooms that have netconfigs */
1260 if (!read_spoolcontrol_file(&sc, filename))
1262 end_critical_section(S_NETCONFIGS);
1265 syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
1267 /* If there are digest recipients, we have to build a digest */
1268 if (sc->digestrecps != NULL) {
1269 sc->digestfp = tmpfile();
1270 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1273 /* Do something useful */
1274 CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1275 network_spool_msg, sc);
1277 /* If we wrote a digest, deliver it and then close it */
1278 snprintf(buf, sizeof buf, "room_%s@%s",
1279 CC->room.QRname, config.c_fqdn);
1280 for (i=0; buf[i]; ++i) {
1281 buf[i] = tolower(buf[i]);
1282 if (isspace(buf[i])) buf[i] = '_';
1284 if (sc->digestfp != NULL) {
1285 fprintf(sc->digestfp, " -----------------------------------"
1286 "------------------------------------"
1288 "You are subscribed to the '%s' "
1290 "To post to the list: %s\n",
1291 CC->room.QRname, buf
1293 network_deliver_digest(sc); /* deliver and close */
1296 /* Now rewrite the config file */
1297 writenfree_spoolcontrol_file(&sc, filename);
1298 end_critical_section(S_NETCONFIGS);
1304 * Send the *entire* contents of the current room to one specific network node,
1305 * ignoring anything we know about which messages have already undergone
1306 * network processing. This can be used to bring a new node into sync.
1308 int network_sync_to(char *target_node) {
1310 int num_spooled = 0;
1316 char filename[PATH_MAX];
1319 /* Grab the configuration line we're looking for */
1320 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1321 begin_critical_section(S_NETCONFIGS);
1322 fp = fopen(filename, "r");
1324 end_critical_section(S_NETCONFIGS);
1327 while (fgets(buf, sizeof buf, fp) != NULL) {
1328 buf[strlen(buf)-1] = 0;
1329 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1330 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1331 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1332 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1333 && (!strcasecmp(sc_node, target_node)) ) {
1336 /* Concise syntax because we don't need a full linked-list */
1337 memset(&sc, 0, sizeof(SpoolControl));
1338 sc.ignet_push_shares = (maplist *)
1339 malloc(sizeof(maplist));
1340 sc.ignet_push_shares->next = NULL;
1341 safestrncpy(sc.ignet_push_shares->remote_nodename,
1343 sizeof sc.ignet_push_shares->remote_nodename);
1344 safestrncpy(sc.ignet_push_shares->remote_roomname,
1346 sizeof sc.ignet_push_shares->remote_roomname);
1350 end_critical_section(S_NETCONFIGS);
1352 if (!found_node) return(-1);
1354 /* Send ALL messages */
1355 num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1356 network_spool_msg, &sc);
1358 /* Concise cleanup because we know there's only one node in the sc */
1359 free(sc.ignet_push_shares);
1361 syslog(LOG_NOTICE, "Synchronized %d messages to <%s>\n",
1362 num_spooled, target_node);
1363 return(num_spooled);
1368 * Implements the NSYN command
1370 void cmd_nsyn(char *argbuf) {
1372 char target_node[256];
1374 if (CtdlAccessCheck(ac_aide)) return;
1376 extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1377 num_spooled = network_sync_to(target_node);
1378 if (num_spooled >= 0) {
1379 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1382 cprintf("%d No such room/node share exists.\n",
1383 ERROR + ROOM_NOT_FOUND);
1390 * Batch up and send all outbound traffic from the current room
1392 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1393 struct RoomProcList *ptr;
1395 ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1396 if (ptr == NULL) return;
1398 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1399 begin_critical_section(S_RPLIST);
1402 end_critical_section(S_RPLIST);
1405 void destroy_network_queue_room(void)
1407 struct RoomProcList *cur, *p;
1408 NetMap *nmcur, *nmp;
1411 begin_critical_section(S_RPLIST);
1419 end_critical_section(S_RPLIST);
1422 while (nmcur != NULL)
1429 if (working_ignetcfg != NULL)
1430 free (working_ignetcfg);
1431 working_ignetcfg = NULL;
1436 * Learn topology from path fields
1438 void network_learn_topology(char *node, char *path) {
1442 strcpy(nexthop, "");
1444 if (num_tokens(path, '!') < 3) return;
1445 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1446 if (!strcasecmp(nmptr->nodename, node)) {
1447 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1448 nmptr->lastcontact = time(NULL);
1454 /* If we got here then it's not in the map, so add it. */
1455 nmptr = (NetMap *) malloc(sizeof (NetMap));
1456 strcpy(nmptr->nodename, node);
1457 nmptr->lastcontact = time(NULL);
1458 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1459 nmptr->next = the_netmap;
1468 * Bounce a message back to the sender
1470 void network_bounce(struct CtdlMessage *msg, char *reason) {
1471 char *oldpath = NULL;
1473 char bouncesource[SIZ];
1474 char recipient[SIZ];
1475 struct recptypes *valid = NULL;
1476 char force_room[ROOMNAMELEN];
1477 static int serialnum = 0;
1480 syslog(LOG_DEBUG, "entering network_bounce()\n");
1482 if (msg == NULL) return;
1484 snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1487 * Give it a fresh message ID
1489 if (msg->cm_fields['I'] != NULL) {
1490 free(msg->cm_fields['I']);
1492 snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1493 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1494 msg->cm_fields['I'] = strdup(buf);
1497 * FIXME ... right now we're just sending a bounce; we really want to
1498 * include the text of the bounced message.
1500 if (msg->cm_fields['M'] != NULL) {
1501 free(msg->cm_fields['M']);
1503 msg->cm_fields['M'] = strdup(reason);
1504 msg->cm_format_type = 0;
1507 * Turn the message around
1509 if (msg->cm_fields['R'] == NULL) {
1510 free(msg->cm_fields['R']);
1513 if (msg->cm_fields['D'] == NULL) {
1514 free(msg->cm_fields['D']);
1517 snprintf(recipient, sizeof recipient, "%s@%s",
1518 msg->cm_fields['A'], msg->cm_fields['N']);
1520 if (msg->cm_fields['A'] == NULL) {
1521 free(msg->cm_fields['A']);
1524 if (msg->cm_fields['N'] == NULL) {
1525 free(msg->cm_fields['N']);
1528 if (msg->cm_fields['U'] == NULL) {
1529 free(msg->cm_fields['U']);
1532 msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1533 msg->cm_fields['N'] = strdup(config.c_nodename);
1534 msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1536 /* prepend our node to the path */
1537 if (msg->cm_fields['P'] != NULL) {
1538 oldpath = msg->cm_fields['P'];
1539 msg->cm_fields['P'] = NULL;
1542 oldpath = strdup("unknown_user");
1544 size = strlen(oldpath) + SIZ;
1545 msg->cm_fields['P'] = malloc(size);
1546 snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1549 /* Now submit the message */
1550 valid = validate_recipients(recipient, NULL, 0);
1551 if (valid != NULL) if (valid->num_error != 0) {
1552 free_recipients(valid);
1555 if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1556 strcpy(force_room, config.c_aideroom);
1559 strcpy(force_room, "");
1561 if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1562 strcpy(force_room, config.c_aideroom);
1564 CtdlSubmitMsg(msg, valid, force_room, 0);
1567 if (valid != NULL) free_recipients(valid);
1568 CtdlFreeMessage(msg);
1569 syslog(LOG_DEBUG, "leaving network_bounce()\n");
1576 * Process a buffer containing a single message from a single file
1577 * from the inbound queue
1579 void network_process_buffer(char *buffer, long size) {
1580 struct CtdlMessage *msg = NULL;
1583 struct recptypes *recp = NULL;
1584 char target_room[ROOMNAMELEN];
1585 struct ser_ret sermsg;
1586 char *oldpath = NULL;
1587 char filename[PATH_MAX];
1590 unsigned char firstbyte;
1591 unsigned char lastbyte;
1593 syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
1595 /* Validate just a little bit. First byte should be FF and * last byte should be 00. */
1596 firstbyte = buffer[0];
1597 lastbyte = buffer[size-1];
1598 if ( (firstbyte != 255) || (lastbyte != 0) ) {
1599 syslog(LOG_ERR, "Corrupt message ignored. Length=%ld, firstbyte = %d, lastbyte = %d\n",
1600 size, firstbyte, lastbyte);
1604 /* Set default target room to trash */
1605 strcpy(target_room, TWITROOM);
1607 /* Load the message into memory */
1608 msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1609 memset(msg, 0, sizeof(struct CtdlMessage));
1610 msg->cm_magic = CTDLMESSAGE_MAGIC;
1611 msg->cm_anon_type = buffer[1];
1612 msg->cm_format_type = buffer[2];
1614 for (pos = 3; pos < size; ++pos) {
1615 field = buffer[pos];
1616 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1617 pos = pos + strlen(&buffer[(int)pos]);
1620 /* Check for message routing */
1621 if (msg->cm_fields['D'] != NULL) {
1622 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1624 /* route the message */
1625 strcpy(nexthop, "");
1626 if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1627 /* prepend our node to the path */
1628 if (msg->cm_fields['P'] != NULL) {
1629 oldpath = msg->cm_fields['P'];
1630 msg->cm_fields['P'] = NULL;
1633 oldpath = strdup("unknown_user");
1635 size = strlen(oldpath) + SIZ;
1636 msg->cm_fields['P'] = malloc(size);
1637 snprintf(msg->cm_fields['P'], size, "%s!%s",
1638 config.c_nodename, oldpath);
1641 /* serialize the message */
1642 serialize_message(&sermsg, msg);
1645 if (IsEmptyStr(nexthop)) {
1646 strcpy(nexthop, msg->cm_fields['D']);
1656 syslog(LOG_DEBUG, "Appending to %s\n", filename);
1657 fp = fopen(filename, "ab");
1659 fwrite(sermsg.ser, sermsg.len, 1, fp);
1663 syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
1666 CtdlFreeMessage(msg);
1670 else { /* invalid destination node name */
1673 "A message you sent could not be delivered due to an invalid destination node"
1674 " name. Please check the address and try sending the message again.\n");
1683 * Check to see if we already have a copy of this message, and
1684 * abort its processing if so. (We used to post a warning to Aide>
1685 * every time this happened, but the network is now so densely
1686 * connected that it's inevitable.)
1688 if (network_usetable(msg) != 0) {
1689 CtdlFreeMessage(msg);
1693 /* Learn network topology from the path */
1694 if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1695 network_learn_topology(msg->cm_fields['N'], msg->cm_fields['P']);
1698 /* Is the sending node giving us a very persuasive suggestion about
1699 * which room this message should be saved in? If so, go with that.
1701 if (msg->cm_fields['C'] != NULL) {
1702 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
1705 /* Otherwise, does it have a recipient? If so, validate it... */
1706 else if (msg->cm_fields['R'] != NULL) {
1707 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1708 if (recp != NULL) if (recp->num_error != 0) {
1710 "A message you sent could not be delivered due to an invalid address.\n"
1711 "Please check the address and try sending the message again.\n");
1713 free_recipients(recp);
1714 syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
1717 strcpy(target_room, ""); /* no target room if mail */
1720 /* Our last shot at finding a home for this message is to see if
1721 * it has the O field (Originating room) set.
1723 else if (msg->cm_fields['O'] != NULL) {
1724 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
1727 /* Strip out fields that are only relevant during transit */
1728 if (msg->cm_fields['D'] != NULL) {
1729 free(msg->cm_fields['D']);
1730 msg->cm_fields['D'] = NULL;
1732 if (msg->cm_fields['C'] != NULL) {
1733 free(msg->cm_fields['C']);
1734 msg->cm_fields['C'] = NULL;
1737 /* save the message into a room */
1738 if (PerformNetprocHooks(msg, target_room) == 0) {
1739 msg->cm_flags = CM_SKIP_HOOKS;
1740 CtdlSubmitMsg(msg, recp, target_room, 0);
1742 CtdlFreeMessage(msg);
1743 free_recipients(recp);
1748 * Process a single message from a single file from the inbound queue
1750 void network_process_message(FILE *fp, long msgstart, long msgend) {
1755 hold_pos = ftell(fp);
1756 size = msgend - msgstart + 1;
1757 buffer = malloc(size);
1758 if (buffer != NULL) {
1759 fseek(fp, msgstart, SEEK_SET);
1760 if (fread(buffer, size, 1, fp) > 0) {
1761 network_process_buffer(buffer, size);
1766 fseek(fp, hold_pos, SEEK_SET);
1771 * Process a single file from the inbound queue
1773 void network_process_file(char *filename) {
1775 long msgstart = (-1L);
1776 long msgend = (-1L);
1781 fp = fopen(filename, "rb");
1783 syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1787 fseek(fp, 0L, SEEK_END);
1788 syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1791 /* Look for messages in the data stream and break them out */
1792 while (ch = getc(fp), ch >= 0) {
1795 if (msgstart >= 0L) {
1796 msgend = msgcur - 1;
1797 network_process_message(fp, msgstart, msgend);
1805 msgend = msgcur - 1;
1806 if (msgstart >= 0L) {
1807 network_process_message(fp, msgstart, msgend);
1816 * Process anything in the inbound queue
1818 void network_do_spoolin(void) {
1821 struct stat statbuf;
1822 char filename[PATH_MAX];
1823 static time_t last_spoolin_mtime = 0L;
1826 * Check the spoolin directory's modification time. If it hasn't
1827 * been touched, we don't need to scan it.
1829 if (stat(ctdl_netin_dir, &statbuf)) return;
1830 if (statbuf.st_mtime == last_spoolin_mtime) {
1831 syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
1834 last_spoolin_mtime = statbuf.st_mtime;
1835 syslog(LOG_DEBUG, "network: processing inbound queue\n");
1838 * Ok, there's something interesting in there, so scan it.
1840 dp = opendir(ctdl_netin_dir);
1841 if (dp == NULL) return;
1843 while (d = readdir(dp), d != NULL) {
1844 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1851 network_process_file(filename);
1859 * Step 1: consolidate files in the outbound queue into one file per neighbor node
1860 * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
1862 void network_consolidate_spoolout(void) {
1865 char filename[PATH_MAX];
1871 /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
1872 dp = opendir(ctdl_netout_dir);
1873 if (dp == NULL) return;
1874 while (d = readdir(dp), d != NULL) {
1876 (strcmp(d->d_name, "."))
1877 && (strcmp(d->d_name, ".."))
1878 && (strchr(d->d_name, '@') != NULL)
1880 safestrncpy(nexthop, d->d_name, sizeof nexthop);
1881 ptr = strchr(nexthop, '@');
1891 syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
1892 if (network_talking_to(nexthop, NTT_CHECK)) {
1894 "Currently online with %s - skipping for now\n",
1899 network_talking_to(nexthop, NTT_ADD);
1900 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
1902 ctdl_netout_dir, nexthop,
1906 network_talking_to(nexthop, NTT_REMOVE);
1912 /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1914 dp = opendir(ctdl_netout_dir);
1915 if (dp == NULL) return;
1917 while (d = readdir(dp), d != NULL) {
1918 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1920 ptr = strchr(d->d_name, '@');
1930 strcpy(nexthop, "");
1931 i = is_valid_node(nexthop, NULL, d->d_name);
1933 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1944 * receive network spool from the remote system
1946 void receive_spool(int *sock, char *remote_nodename) {
1947 int download_len = 0L;
1948 int bytes_received = 0L;
1950 char tempfilename[PATH_MAX];
1951 char permfilename[PATH_MAX];
1955 snprintf(tempfilename,
1956 sizeof tempfilename,
1964 snprintf(permfilename,
1965 sizeof permfilename,
1973 if (sock_puts(sock, "NDOP") < 0) return;
1974 if (sock_getln(sock, buf, sizeof buf) < 0) return;
1975 syslog(LOG_DEBUG, "<%s\n", buf);
1976 if (buf[0] != '2') {
1980 download_len = extract_long(&buf[4], 0);
1981 if (download_len <= 0) {
1985 bytes_received = 0L;
1986 fp = fopen(tempfilename, "w");
1988 syslog(LOG_CRIT, "Cannot create %s: %s\n", tempfilename, strerror(errno));
1992 syslog(LOG_DEBUG, "Expecting to transfer %d bytes\n", download_len);
1993 while (bytes_received < download_len) {
1995 * If shutting down we can exit here and unlink the temp file.
1996 * this shouldn't loose us any messages.
1998 if (server_shutting_down)
2001 unlink(tempfilename);
2004 snprintf(buf, sizeof buf, "READ %d|%d",
2006 ((download_len - bytes_received > IGNET_PACKET_SIZE)
2007 ? IGNET_PACKET_SIZE : (download_len - bytes_received))
2010 if (sock_puts(sock, buf) < 0) {
2012 unlink(tempfilename);
2015 if (sock_getln(sock, buf, sizeof buf) < 0) {
2017 unlink(tempfilename);
2021 if (buf[0] == '6') {
2022 plen = extract_int(&buf[4], 0);
2023 StrBuf *pbuf = NewStrBuf();
2024 if (socket_read_blob(sock, pbuf, plen, CLIENT_TIMEOUT) != plen) {
2025 syslog(LOG_INFO, "Short read from peer; aborting.\n");
2027 unlink(tempfilename);
2031 fwrite(ChrPtr(pbuf), plen, 1, fp);
2032 bytes_received += plen;
2039 /* Last chance for shutdown exit */
2040 if (server_shutting_down)
2042 unlink(tempfilename);
2046 if (sock_puts(sock, "CLOS") < 0) {
2047 unlink(tempfilename);
2052 * From here on we must complete or messages will get lost
2054 if (sock_getln(sock, buf, sizeof buf) < 0) {
2055 unlink(tempfilename);
2059 syslog(LOG_DEBUG, "%s\n", buf);
2062 * Now move the temp file to its permanent location.
2064 if (link(tempfilename, permfilename) != 0) {
2065 syslog(LOG_ALERT, "Could not link %s to %s: %s\n",
2066 tempfilename, permfilename, strerror(errno)
2070 unlink(tempfilename);
2076 * transmit network spool to the remote system
2078 void transmit_spool(int *sock, char *remote_nodename)
2083 long bytes_to_write, thisblock, bytes_written;
2087 if (sock_puts(sock, "NUOP") < 0) return;
2088 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2089 syslog(LOG_DEBUG, "<%s\n", buf);
2090 if (buf[0] != '2') {
2094 snprintf(sfname, sizeof sfname,
2099 fd = open(sfname, O_RDONLY);
2101 if (errno != ENOENT) {
2102 syslog(LOG_CRIT, "cannot open %s: %s\n", sfname, strerror(errno));
2107 while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
2108 bytes_to_write = plen;
2109 while (bytes_to_write > 0L) {
2110 /* Exit if shutting down */
2111 if (server_shutting_down)
2117 snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
2118 if (sock_puts(sock, buf) < 0) {
2122 if (sock_getln(sock, buf, sizeof buf) < 0) {
2126 thisblock = atol(&buf[4]);
2127 if (buf[0] == '7') {
2128 if (sock_write(sock, pbuf, (int) thisblock) < 0) {
2132 bytes_to_write -= thisblock;
2133 bytes_written += thisblock;
2143 /* Last chance for shutdown exit */
2144 if(server_shutting_down)
2147 if (sock_puts(sock, "UCLS 1") < 0) return;
2150 * From here on we must complete or messages will get lost
2152 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2153 syslog(LOG_NOTICE, "Sent %ld octets to <%s>\n", bytes_written, remote_nodename);
2154 syslog(LOG_DEBUG, "<%s\n", buf);
2155 if (buf[0] == '2') {
2156 syslog(LOG_DEBUG, "Removing <%s>\n", sfname);
2164 * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
2166 void network_poll_node(char *node, char *secret, char *host, char *port) {
2170 char connected_to[SIZ];
2173 if (network_talking_to(node, NTT_CHECK)) return;
2174 network_talking_to(node, NTT_ADD);
2175 syslog(LOG_DEBUG, "network: polling <%s>\n", node);
2176 syslog(LOG_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
2178 sock = sock_connect(host, port);
2180 syslog(LOG_ERR, "Could not connect: %s\n", strerror(errno));
2181 network_talking_to(node, NTT_REMOVE);
2185 syslog(LOG_DEBUG, "Connected!\n");
2186 CCC->SBuf.Buf = NewStrBuf();
2187 CCC->sMigrateBuf = NewStrBuf();
2188 CCC->SBuf.ReadWritePointer = NULL;
2190 /* Read the server greeting */
2191 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2192 syslog(LOG_DEBUG, ">%s\n", buf);
2194 /* Check that the remote is who we think it is and warn the Aide if not */
2195 extract_token (connected_to, buf, 1, ' ', sizeof connected_to);
2196 if (strcmp(connected_to, node))
2198 snprintf(err_buf, sizeof(err_buf),
2199 "Connected to node \"%s\" but I was expecting to connect to node \"%s\".",
2202 syslog(LOG_ERR, "%s\n", err_buf);
2203 CtdlAideMessage(err_buf, "Network error");
2206 /* We're talking to the correct node. Now identify ourselves. */
2207 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
2208 syslog(LOG_DEBUG, "<%s\n", buf);
2209 if (sock_puts(&sock, buf) <0) goto bail;
2210 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2211 syslog(LOG_DEBUG, ">%s\n", buf);
2212 if (buf[0] != '2') {
2216 /* At this point we are authenticated. */
2217 if (!server_shutting_down)
2218 receive_spool(&sock, node);
2219 if (!server_shutting_down)
2220 transmit_spool(&sock, node);
2223 sock_puts(&sock, "QUIT");
2225 FreeStrBuf(&CCC->SBuf.Buf);
2226 FreeStrBuf(&CCC->sMigrateBuf);
2229 network_talking_to(node, NTT_REMOVE);
2235 * Poll other Citadel nodes and transfer inbound/outbound network data.
2236 * Set "full" to nonzero to force a poll of every node, or to zero to poll
2237 * only nodes to which we have data to send.
2239 void network_poll_other_citadel_nodes(int full_poll) {
2247 char spoolfile[256];
2249 if (working_ignetcfg == NULL) {
2250 syslog(LOG_DEBUG, "network: no neighbor nodes are configured - not polling.\n");
2254 /* Use the string tokenizer to grab one line at a time */
2255 for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2256 if(server_shutting_down)
2258 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2259 extract_token(node, linebuf, 0, '|', sizeof node);
2260 extract_token(secret, linebuf, 1, '|', sizeof secret);
2261 extract_token(host, linebuf, 2, '|', sizeof host);
2262 extract_token(port, linebuf, 3, '|', sizeof port);
2263 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2264 && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2273 if (access(spoolfile, R_OK) == 0) {
2278 network_poll_node(node, secret, host, port);
2289 * It's ok if these directories already exist. Just fail silently.
2291 void create_spool_dirs(void) {
2292 if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
2293 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
2294 if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
2295 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
2296 if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
2297 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
2298 if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
2299 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
2300 if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
2301 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2302 if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
2303 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2304 if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
2305 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
2306 if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
2307 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
2315 * network_do_queue()
2317 * Run through the rooms doing various types of network stuff.
2319 void network_do_queue(void) {
2320 static int doing_queue = 0;
2321 static time_t last_run = 0L;
2322 struct RoomProcList *ptr;
2323 int full_processing = 1;
2326 * Run the full set of processing tasks no more frequently
2327 * than once every n seconds
2329 if ( (time(NULL) - last_run) < config.c_net_freq ) {
2330 full_processing = 0;
2331 syslog(LOG_DEBUG, "Network full processing in %ld seconds.\n",
2332 config.c_net_freq - (time(NULL)- last_run)
2337 * This is a simple concurrency check to make sure only one queue run
2338 * is done at a time. We could do this with a mutex, but since we
2339 * don't really require extremely fine granularity here, we'll do it
2340 * with a static variable instead.
2347 /* Load the IGnet Configuration into memory */
2348 load_working_ignetcfg();
2351 * Poll other Citadel nodes. Maybe. If "full_processing" is set
2352 * then we poll everyone. Otherwise we only poll nodes we have stuff
2355 network_poll_other_citadel_nodes(full_processing);
2358 * Load the network map and filter list into memory.
2361 filterlist = load_filter_list();
2364 * Go ahead and run the queue
2366 if (full_processing && !server_shutting_down) {
2367 syslog(LOG_DEBUG, "network: loading outbound queue\n");
2368 CtdlForEachRoom(network_queue_room, NULL);
2371 if (rplist != NULL) {
2372 syslog(LOG_DEBUG, "network: running outbound queue\n");
2373 while (rplist != NULL && !server_shutting_down) {
2374 char spoolroomname[ROOMNAMELEN];
2375 safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2376 begin_critical_section(S_RPLIST);
2378 /* pop this record off the list */
2380 rplist = rplist->next;
2383 /* invalidate any duplicate entries to prevent double processing */
2384 for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2385 if (!strcasecmp(ptr->name, spoolroomname)) {
2390 end_critical_section(S_RPLIST);
2391 if (spoolroomname[0] != 0) {
2392 network_spoolout_room(spoolroomname);
2397 /* If there is anything in the inbound queue, process it */
2398 if (!server_shutting_down) {
2399 network_do_spoolin();
2402 /* Save the network map back to disk */
2403 write_network_map();
2405 /* Free the filter list in memory */
2406 free_filter_list(filterlist);
2409 network_consolidate_spoolout();
2411 syslog(LOG_DEBUG, "network: queue run completed\n");
2413 if (full_processing) {
2414 last_run = time(NULL);
2422 * cmd_netp() - authenticate to the server as another Citadel node polling
2423 * for network traffic
2425 void cmd_netp(char *cmdbuf)
2436 extract_token(node, cmdbuf, 0, '|', sizeof node);
2437 extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2439 /* load the IGnet Configuration to check node validity */
2440 load_working_ignetcfg();
2441 v = is_valid_node(nexthop, secret, node);
2444 snprintf(err_buf, sizeof err_buf,
2445 "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
2446 node, CC->cs_host, CC->cs_addr
2448 syslog(LOG_WARNING, err_buf);
2449 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2450 CtdlAideMessage(err_buf, "IGNet Networking.");
2454 if (strcasecmp(pass, secret)) {
2455 snprintf(err_buf, sizeof err_buf,
2456 "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
2457 CC->cs_host, CC->cs_addr, node
2459 syslog(LOG_WARNING, err_buf);
2460 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2461 CtdlAideMessage(err_buf, "IGNet Networking.");
2465 if (network_talking_to(node, NTT_CHECK)) {
2466 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
2467 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2471 safestrncpy(CC->net_node, node, sizeof CC->net_node);
2472 network_talking_to(node, NTT_ADD);
2473 syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
2474 CC->net_node, CC->cs_host, CC->cs_addr
2476 cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
2480 int network_room_handler (struct ctdlroom *room)
2482 network_queue_room(room, NULL);
2488 * Module entry point
2490 CTDL_MODULE_INIT(network)
2494 create_spool_dirs();
2495 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2496 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2497 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2498 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2499 CtdlRegisterRoomHook(network_room_handler);
2500 CtdlRegisterCleanupHook(destroy_network_queue_room);
2501 CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);