4 * This module handles shared rooms, inter-Citadel mail, and outbound
5 * mailing list processing.
7 * Copyright (c) 2000-2010 by the citadel.org team
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ** NOTE ** A word on the S_NETCONFIGS semaphore:
24 * This is a fairly high-level type of critical section. It ensures that no
25 * two threads work on the netconfigs files at the same time. Since we do
26 * so many things inside these, here are the rules:
27 * 1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
28 * 2. Do *not* perform any I/O with the client during these sections.
33 * Duration of time (in seconds) after which pending list subscribe/unsubscribe
34 * requests that have not been confirmed will be deleted.
36 #define EXP 259200 /* three days */
48 #include <sys/types.h>
50 #if TIME_WITH_SYS_TIME
51 # include <sys/time.h>
55 # include <sys/time.h>
63 # if HAVE_SYS_SYSCALL_H
64 # include <sys/syscall.h>
71 #include <libcitadel.h>
74 #include "citserver.h"
80 #include "internet_addressing.h"
81 #include "serv_network.h"
82 #include "clientsocket.h"
84 #include "citadel_dirs.h"
93 #include "ctdl_module.h"
97 /* Nonzero while we are doing network processing */
98 static int doing_queue = 0;
101 * When we do network processing, it's accomplished in two passes; one to
102 * gather a list of rooms and one to actually do them. It's ok that rplist
103 * is global; we have a mutex that keeps it safe.
105 struct RoomProcList *rplist = NULL;
108 * We build a map of network nodes during processing.
110 NetMap *the_netmap = NULL;
111 int netmap_changed = 0;
112 char *working_ignetcfg = NULL;
115 * Load or refresh the Citadel network (IGnet) configuration for this node.
117 void load_working_ignetcfg(void) {
121 cfg = CtdlGetSysConfig(IGNETCFG);
126 oldcfg = working_ignetcfg;
127 working_ignetcfg = cfg;
128 if (oldcfg != NULL) {
138 * Keep track of what messages to reject
140 FilterList *load_filter_list(void) {
141 char *serialized_list = NULL;
144 FilterList *newlist = NULL;
147 serialized_list = CtdlGetSysConfig(FILTERLIST);
148 if (serialized_list == NULL) return(NULL); /* if null, no entries */
150 /* Use the string tokenizer to grab one line at a time */
151 for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
152 extract_token(buf, serialized_list, i, '\n', sizeof buf);
153 nptr = (FilterList *) malloc(sizeof(FilterList));
154 extract_token(nptr->fl_user, buf, 0, '|', sizeof nptr->fl_user);
155 striplt(nptr->fl_user);
156 extract_token(nptr->fl_room, buf, 1, '|', sizeof nptr->fl_room);
157 striplt(nptr->fl_room);
158 extract_token(nptr->fl_node, buf, 2, '|', sizeof nptr->fl_node);
159 striplt(nptr->fl_node);
161 /* Cowardly refuse to add an any/any/any entry that would
162 * end up filtering every single message.
164 if (IsEmptyStr(nptr->fl_user) &&
165 IsEmptyStr(nptr->fl_room) &&
166 IsEmptyStr(nptr->fl_node)) {
170 nptr->next = newlist;
175 free(serialized_list);
180 void free_filter_list(FilterList *fl) {
181 if (fl == NULL) return;
182 free_filter_list(fl->next);
189 * Check the use table. This is a list of messages which have recently
190 * arrived on the system. It is maintained and queried to prevent the same
191 * message from being entered into the database multiple times if it happens
192 * to arrive multiple times by accident.
194 int network_usetable(struct CtdlMessage *msg) {
197 struct cdbdata *cdbut;
200 /* Bail out if we can't generate a message ID */
204 if (msg->cm_fields['I'] == NULL) {
207 if (IsEmptyStr(msg->cm_fields['I'])) {
211 /* Generate the message ID */
212 strcpy(msgid, msg->cm_fields['I']);
213 if (haschar(msgid, '@') == 0) {
215 if (msg->cm_fields['N'] != NULL) {
216 strcat(msgid, msg->cm_fields['N']);
223 cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
226 CtdlLogPrintf(CTDL_DEBUG, "network_usetable() : we already have %s\n", msgid);
230 /* If we got to this point, it's unique: add it. */
231 strcpy(ut.ut_msgid, msgid);
232 ut.ut_timestamp = time(NULL);
233 cdb_store(CDB_USETABLE, msgid, strlen(msgid), &ut, sizeof(struct UseTable) );
239 * Read the network map from its configuration file into memory.
241 void read_network_map(void) {
242 char *serialized_map = NULL;
247 serialized_map = CtdlGetSysConfig(IGNETMAP);
248 if (serialized_map == NULL) return; /* if null, no entries */
250 /* Use the string tokenizer to grab one line at a time */
251 for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
252 extract_token(buf, serialized_map, i, '\n', sizeof buf);
253 nmptr = (NetMap *) malloc(sizeof(NetMap));
254 extract_token(nmptr->nodename, buf, 0, '|', sizeof nmptr->nodename);
255 nmptr->lastcontact = extract_long(buf, 1);
256 extract_token(nmptr->nexthop, buf, 2, '|', sizeof nmptr->nexthop);
257 nmptr->next = the_netmap;
261 free(serialized_map);
267 * Write the network map from memory back to the configuration file.
269 void write_network_map(void) {
270 char *serialized_map = NULL;
274 if (netmap_changed) {
275 serialized_map = strdup("");
277 if (the_netmap != NULL) {
278 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
279 serialized_map = realloc(serialized_map,
280 (strlen(serialized_map)+SIZ) );
281 if (!IsEmptyStr(nmptr->nodename)) {
282 snprintf(&serialized_map[strlen(serialized_map)],
286 (long)nmptr->lastcontact,
292 CtdlPutSysConfig(IGNETMAP, serialized_map);
293 free(serialized_map);
296 /* Now free the list */
297 while (the_netmap != NULL) {
298 nmptr = the_netmap->next;
308 * Check the network map and determine whether the supplied node name is
309 * valid. If it is not a neighbor node, supply the name of a neighbor node
310 * which is the next hop. If it *is* a neighbor node, we also fill in the
313 int is_valid_node(char *nexthop, char *secret, char *node) {
325 * First try the neighbor nodes
327 if (working_ignetcfg == NULL) {
328 CtdlLogPrintf(CTDL_ERR, "working_ignetcfg is NULL!\n");
329 if (nexthop != NULL) {
336 if (nexthop != NULL) {
340 /* Use the string tokenizer to grab one line at a time */
341 for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
342 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
343 extract_token(buf, linebuf, 0, '|', sizeof buf);
344 if (!strcasecmp(buf, node)) {
345 if (nexthop != NULL) {
348 if (secret != NULL) {
349 extract_token(secret, linebuf, 1, '|', 256);
356 return(retval); /* yup, it's a direct neighbor */
360 * If we get to this point we have to see if we know the next hop
362 if (the_netmap != NULL) {
363 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
364 if (!strcasecmp(nmptr->nodename, node)) {
365 if (nexthop != NULL) {
366 strcpy(nexthop, nmptr->nexthop);
374 * If we get to this point, the supplied node name is bogus.
376 CtdlLogPrintf(CTDL_ERR, "Invalid node name <%s>\n", node);
384 void cmd_gnet(char *argbuf) {
385 char filename[PATH_MAX];
389 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
390 /* users can edit the netconfigs for their own mailbox rooms */
392 else if (CtdlAccessCheck(ac_room_aide)) return;
394 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
395 cprintf("%d Network settings for room #%ld <%s>\n",
397 CC->room.QRnumber, CC->room.QRname);
399 fp = fopen(filename, "r");
401 while (fgets(buf, sizeof buf, fp) != NULL) {
402 buf[strlen(buf)-1] = 0;
403 cprintf("%s\n", buf);
412 void cmd_snet(char *argbuf) {
413 char tempfilename[PATH_MAX];
414 char filename[PATH_MAX];
423 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
424 /* users can edit the netconfigs for their own mailbox rooms */
426 else if (CtdlAccessCheck(ac_room_aide)) return;
428 len = assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
429 memcpy(tempfilename, filename, len + 1);
431 memset(&StatBuf, 0, sizeof(struct stat));
432 if ((stat(filename, &StatBuf) == -1) || (StatBuf.st_size == 0))
433 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
435 sprintf(tempfilename + len, ".%d", CC->cs_pid);
437 TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
439 if ((TmpFD > 0) && (errno == 0))
441 char *tmp = malloc(StatBuf.st_size * 2);
442 memset(tmp, ' ', StatBuf.st_size * 2);
443 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
445 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
448 cprintf("%d Unable to allocate the space required for %s: %s\n",
449 ERROR + INTERNAL_ERROR,
452 unlink(tempfilename);
455 lseek(TmpFD, SEEK_SET, 0);
458 cprintf("%d Unable to allocate the space required for %s: %s\n",
459 ERROR + INTERNAL_ERROR,
462 unlink(tempfilename);
467 cprintf("%d %s\n", SEND_LISTING, tempfilename);
470 while (rc = CtdlClientGetLine(Line),
473 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
475 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
476 write(TmpFD, ChrPtr(Line), StrLength(Line));
477 len += StrLength(Line);
480 ftruncate(TmpFD, len);
483 /* Now copy the temp file to its permanent location.
484 * (We copy instead of link because they may be on different filesystems)
486 begin_critical_section(S_NETCONFIGS);
487 rename(tempfilename, filename);
488 end_critical_section(S_NETCONFIGS);
493 * Deliver digest messages
495 void network_deliver_digest(SpoolControl *sc) {
498 struct CtdlMessage *msg = NULL;
501 size_t recps_len = SIZ;
503 struct recptypes *valid;
507 if (sc->num_msgs_spooled < 1) {
508 fclose(sc->digestfp);
513 msg = malloc(sizeof(struct CtdlMessage));
514 memset(msg, 0, sizeof(struct CtdlMessage));
515 msg->cm_magic = CTDLMESSAGE_MAGIC;
516 msg->cm_format_type = FMT_RFC822;
517 msg->cm_anon_type = MES_NORMAL;
519 sprintf(buf, "%ld", time(NULL));
520 msg->cm_fields['T'] = strdup(buf);
521 msg->cm_fields['A'] = strdup(CC->room.QRname);
522 snprintf(buf, sizeof buf, "[%s]", CC->room.QRname);
523 msg->cm_fields['U'] = strdup(buf);
524 sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
525 for (i=0; buf[i]; ++i) {
526 if (isspace(buf[i])) buf[i]='_';
527 buf[i] = tolower(buf[i]);
529 msg->cm_fields['F'] = strdup(buf);
530 msg->cm_fields['R'] = strdup(buf);
532 /* Set the 'List-ID' header */
533 msg->cm_fields['L'] = malloc(1024);
534 snprintf(msg->cm_fields['L'], 1024,
535 "%s <%ld.list-id.%s>",
542 * Go fetch the contents of the digest
544 fseek(sc->digestfp, 0L, SEEK_END);
545 msglen = ftell(sc->digestfp);
547 msg->cm_fields['M'] = malloc(msglen + 1);
548 fseek(sc->digestfp, 0L, SEEK_SET);
549 siz = fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
550 msg->cm_fields['M'][msglen] = '\0';
552 fclose(sc->digestfp);
555 /* Now generate the delivery instructions */
558 * Figure out how big a buffer we need to allocate
560 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
561 recps_len = recps_len + strlen(nptr->name) + 2;
564 recps = malloc(recps_len);
567 CtdlLogPrintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
574 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
575 if (nptr != sc->digestrecps) {
578 strcat(recps, nptr->name);
581 /* Where do we want bounces and other noise to be heard? Surely not the list members! */
582 snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
584 /* Now submit the message */
585 valid = validate_recipients(recps, NULL, 0);
588 valid->bounce_to = strdup(bounce_to);
589 valid->envelope_from = strdup(bounce_to);
590 CtdlSubmitMsg(msg, valid, NULL, 0);
592 CtdlFreeMessage(msg);
593 free_recipients(valid);
598 * Deliver list messages to everyone on the list ... efficiently
600 void network_deliver_list(struct CtdlMessage *msg, SpoolControl *sc) {
602 size_t recps_len = SIZ;
603 struct recptypes *valid;
607 /* Don't do this if there were no recipients! */
608 if (sc->listrecps == NULL) return;
610 /* Now generate the delivery instructions */
613 * Figure out how big a buffer we need to allocate
615 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
616 recps_len = recps_len + strlen(nptr->name) + 2;
619 recps = malloc(recps_len);
622 CtdlLogPrintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
629 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
630 if (nptr != sc->listrecps) {
633 strcat(recps, nptr->name);
636 /* Where do we want bounces and other noise to be heard? Surely not the list members! */
637 snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
639 /* Now submit the message */
640 valid = validate_recipients(recps, NULL, 0);
643 valid->bounce_to = strdup(bounce_to);
644 valid->envelope_from = strdup(bounce_to);
645 CtdlSubmitMsg(msg, valid, NULL, 0);
646 free_recipients(valid);
648 /* Do not call CtdlFreeMessage(msg) here; the caller will free it. */
655 * Spools out one message from the list.
657 void network_spool_msg(long msgnum, void *userdata) {
660 char *newpath = NULL;
661 size_t instr_len = SIZ;
662 struct CtdlMessage *msg = NULL;
665 struct ser_ret sermsg;
667 char filename[PATH_MAX];
671 int delete_after_send = 0; /* Set to 1 to delete after spooling */
672 int ok_to_participate = 0;
673 struct recptypes *valid;
675 sc = (SpoolControl *)userdata;
678 * Process mailing list recipients
681 if (sc->listrecps != NULL) {
682 /* Fetch the message. We're going to need to modify it
683 * in order to insert the [list name] in it, etc.
685 msg = CtdlFetchMessage(msgnum, 1);
689 StrBuf *Subject, *FlatSubject;
691 if (msg->cm_fields['V'] == NULL){
692 /* local message, no enVelope */
695 StrBufAppendBufPlain(Buf, msg->cm_fields['O'], -1, 0);
696 StrBufAppendBufPlain(Buf, HKEY("@"), 0);
697 StrBufAppendBufPlain(Buf, config.c_fqdn, -1, 0);
699 msg->cm_fields['K'] = SmashStrBuf(&Buf);
702 msg->cm_fields['K'] = strdup (msg->cm_fields['V']);
704 /* Set the 'List-ID' header */
705 if (msg->cm_fields['L'] != NULL) {
706 free(msg->cm_fields['L']);
708 msg->cm_fields['L'] = malloc(1024);
709 snprintf(msg->cm_fields['L'], 1024,
710 "%s <%ld.list-id.%s>",
716 /* Prepend "[List name]" to the subject */
717 if (msg->cm_fields['U'] == NULL) {
718 Subject = NewStrBufPlain(HKEY("(no subject)"));
721 Subject = NewStrBufPlain(msg->cm_fields['U'], -1);
723 FlatSubject = NewStrBufPlain(NULL, StrLength(Subject));
724 StrBuf_RFC822_to_Utf8(FlatSubject, Subject, NULL, NULL);
726 rlen = strlen(CC->room.QRname);
727 pCh = strstr(ChrPtr(FlatSubject), CC->room.QRname);
729 (*(pCh + rlen) != ']') ||
730 (pCh == ChrPtr(FlatSubject)) ||
735 StrBufPlain(Subject, HKEY("["));
736 StrBufAppendBufPlain(Subject, CC->room.QRname, rlen, 0);
737 StrBufAppendBufPlain(Subject, HKEY("] "), 0);
738 StrBufAppendBuf(Subject, FlatSubject, 0);
739 tmp = Subject; Subject = FlatSubject; FlatSubject = tmp; /* so we can free the right one... */
740 StrBufRFC2047encode(&Subject, FlatSubject);
743 if (msg->cm_fields['U'] != NULL)
744 free (msg->cm_fields['U']);
745 msg->cm_fields['U'] = SmashStrBuf(&Subject);
747 FreeStrBuf(&FlatSubject);
749 /* else we won't modify the buffer, since the roomname is already here. */
751 /* Set the recipient of the list message to the
752 * email address of the room itself.
753 * FIXME ... I want to be able to pick any address
755 if (msg->cm_fields['R'] != NULL) {
756 free(msg->cm_fields['R']);
758 msg->cm_fields['R'] = malloc(256);
759 snprintf(msg->cm_fields['R'], 256,
760 "room_%s@%s", CC->room.QRname,
762 for (i=0; msg->cm_fields['R'][i]; ++i) {
763 if (isspace(msg->cm_fields['R'][i])) {
764 msg->cm_fields['R'][i] = '_';
768 /* Handle delivery */
769 network_deliver_list(msg, sc);
770 CtdlFreeMessage(msg);
775 * Process digest recipients
777 if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
778 msg = CtdlFetchMessage(msgnum, 1);
780 fprintf(sc->digestfp, " -----------------------------------"
781 "------------------------------------"
783 fprintf(sc->digestfp, "From: ");
784 if (msg->cm_fields['A'] != NULL) {
785 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
787 if (msg->cm_fields['F'] != NULL) {
788 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
790 else if (msg->cm_fields['N'] != NULL) {
791 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
793 fprintf(sc->digestfp, "\n");
794 if (msg->cm_fields['U'] != NULL) {
795 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
798 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
800 safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
801 CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
803 StrBufTrim(CC->redirect_buffer);
804 fwrite(HKEY("\n"), 1, sc->digestfp);
805 fwrite(SKEY(CC->redirect_buffer), 1, sc->digestfp);
806 fwrite(HKEY("\n"), 1, sc->digestfp);
808 FreeStrBuf(&CC->redirect_buffer);
810 sc->num_msgs_spooled += 1;
816 * Process client-side list participations for this room
819 if (sc->participates != NULL) {
820 msg = CtdlFetchMessage(msgnum, 1);
823 /* Only send messages which originated on our own Citadel
824 * network, otherwise we'll end up sending the remote
825 * mailing list's messages back to it, which is rude...
827 ok_to_participate = 0;
828 if (msg->cm_fields['N'] != NULL) {
829 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
830 ok_to_participate = 1;
832 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
833 ok_to_participate = 1;
836 if (ok_to_participate) {
837 if (msg->cm_fields['F'] != NULL) {
838 free(msg->cm_fields['F']);
840 msg->cm_fields['F'] = malloc(SIZ);
841 /* Replace the Internet email address of the actual
842 * author with the email address of the room itself,
843 * so the remote listserv doesn't reject us.
844 * FIXME ... I want to be able to pick any address
846 snprintf(msg->cm_fields['F'], SIZ,
847 "room_%s@%s", CC->room.QRname,
849 for (i=0; msg->cm_fields['F'][i]; ++i) {
850 if (isspace(msg->cm_fields['F'][i])) {
851 msg->cm_fields['F'][i] = '_';
856 * Figure out how big a buffer we need to allocate
858 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
860 if (msg->cm_fields['R'] == NULL) {
861 free(msg->cm_fields['R']);
863 msg->cm_fields['R'] = strdup(nptr->name);
865 valid = validate_recipients(nptr->name, NULL, 0);
866 CtdlSubmitMsg(msg, valid, "", 0);
867 free_recipients(valid);
871 CtdlFreeMessage(msg);
876 * Process IGnet push shares
878 msg = CtdlFetchMessage(msgnum, 1);
882 /* Prepend our node name to the Path field whenever
883 * sending a message to another IGnet node
885 if (msg->cm_fields['P'] == NULL) {
886 msg->cm_fields['P'] = strdup("username");
888 newpath_len = strlen(msg->cm_fields['P']) +
889 strlen(config.c_nodename) + 2;
890 newpath = malloc(newpath_len);
891 snprintf(newpath, newpath_len, "%s!%s",
892 config.c_nodename, msg->cm_fields['P']);
893 free(msg->cm_fields['P']);
894 msg->cm_fields['P'] = newpath;
897 * Determine if this message is set to be deleted
898 * after sending out on the network
900 if (msg->cm_fields['S'] != NULL) {
901 if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
902 delete_after_send = 1;
906 /* Now send it to every node */
907 if (sc->ignet_push_shares != NULL)
908 for (mptr = sc->ignet_push_shares; mptr != NULL;
913 /* Check for valid node name */
914 if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
915 CtdlLogPrintf(CTDL_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
919 /* Check for split horizon */
920 CtdlLogPrintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
921 bang = num_tokens(msg->cm_fields['P'], '!');
922 if (bang > 1) for (i=0; i<(bang-1); ++i) {
923 extract_token(buf, msg->cm_fields['P'], i, '!', sizeof buf);
924 CtdlLogPrintf(CTDL_DEBUG, "Compare <%s> to <%s>\n",
925 buf, mptr->remote_nodename) ;
926 if (!strcasecmp(buf, mptr->remote_nodename)) {
928 CtdlLogPrintf(CTDL_DEBUG, "Not sending to %s\n",
929 mptr->remote_nodename);
932 CtdlLogPrintf(CTDL_DEBUG, "Sending to %s\n", mptr->remote_nodename);
936 /* Send the message */
940 * Force the message to appear in the correct room
941 * on the far end by setting the C field correctly
943 if (msg->cm_fields['C'] != NULL) {
944 free(msg->cm_fields['C']);
946 if (!IsEmptyStr(mptr->remote_roomname)) {
947 msg->cm_fields['C'] = strdup(mptr->remote_roomname);
950 msg->cm_fields['C'] = strdup(CC->room.QRname);
953 /* serialize it for transmission */
954 serialize_message(&sermsg, msg);
955 if (sermsg.len > 0) {
957 /* write it to a spool file */
958 snprintf(filename, sizeof filename,"%s/%s@%lx%x",
960 mptr->remote_nodename,
964 CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
965 fp = fopen(filename, "ab");
972 CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
975 /* free the serialized version */
981 CtdlFreeMessage(msg);
984 /* update lastsent */
985 sc->lastsent = msgnum;
987 /* Delete this message if delete-after-send is set */
988 if (delete_after_send) {
989 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
995 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
1001 char roomname[ROOMNAMELEN];
1002 size_t miscsize = 0;
1003 size_t linesize = 0;
1004 int skipthisline = 0;
1005 namelist *nptr = NULL;
1006 maplist *mptr = NULL;
1009 fp = fopen(filename, "r");
1013 sc = malloc(sizeof(SpoolControl));
1014 memset(sc, 0, sizeof(SpoolControl));
1017 while (fgets(buf, sizeof buf, fp) != NULL) {
1018 buf[strlen(buf)-1] = 0;
1020 extract_token(instr, buf, 0, '|', sizeof instr);
1021 if (!strcasecmp(instr, strof(lastsent))) {
1022 sc->lastsent = extract_long(buf, 1);
1024 else if (!strcasecmp(instr, strof(listrecp))) {
1026 malloc(sizeof(namelist));
1027 nptr->next = sc->listrecps;
1028 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1029 sc->listrecps = nptr;
1031 else if (!strcasecmp(instr, strof(participate))) {
1033 malloc(sizeof(namelist));
1034 nptr->next = sc->participates;
1035 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1036 sc->participates = nptr;
1038 else if (!strcasecmp(instr, strof(digestrecp))) {
1040 malloc(sizeof(namelist));
1041 nptr->next = sc->digestrecps;
1042 extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1043 sc->digestrecps = nptr;
1045 else if (!strcasecmp(instr, strof(ignet_push_share))) {
1046 extract_token(nodename, buf, 1, '|', sizeof nodename);
1047 extract_token(roomname, buf, 2, '|', sizeof roomname);
1048 mptr = (maplist *) malloc(sizeof(maplist));
1049 mptr->next = sc->ignet_push_shares;
1050 strcpy(mptr->remote_nodename, nodename);
1051 strcpy(mptr->remote_roomname, roomname);
1052 sc->ignet_push_shares = mptr;
1055 /* Preserve 'other' lines ... *unless* they happen to
1056 * be subscribe/unsubscribe pendings with expired
1060 if (!strncasecmp(buf, strof(subpending)"|", 11)) {
1061 if (time(NULL) - extract_long(buf, 4) > EXP) {
1065 if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
1066 if (time(NULL) - extract_long(buf, 3) > EXP) {
1071 if (skipthisline == 0) {
1072 linesize = strlen(buf);
1073 sc->misc = realloc(sc->misc,
1074 (miscsize + linesize + 2) );
1075 sprintf(&sc->misc[miscsize], "%s\n", buf);
1076 miscsize = miscsize + linesize + 1;
1086 void free_spoolcontrol_struct(SpoolControl **scc)
1089 namelist *nptr = NULL;
1090 maplist *mptr = NULL;
1093 while (sc->listrecps != NULL) {
1094 nptr = sc->listrecps->next;
1095 free(sc->listrecps);
1096 sc->listrecps = nptr;
1098 /* Do the same for digestrecps */
1099 while (sc->digestrecps != NULL) {
1100 nptr = sc->digestrecps->next;
1101 free(sc->digestrecps);
1102 sc->digestrecps = nptr;
1104 /* Do the same for participates */
1105 while (sc->participates != NULL) {
1106 nptr = sc->participates->next;
1107 free(sc->participates);
1108 sc->participates = nptr;
1110 while (sc->ignet_push_shares != NULL) {
1111 mptr = sc->ignet_push_shares->next;
1112 free(sc->ignet_push_shares);
1113 sc->ignet_push_shares = mptr;
1120 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
1122 char tempfilename[PATH_MAX];
1125 namelist *nptr = NULL;
1126 maplist *mptr = NULL;
1130 long reltid; /* if we don't have SYS_gettid, use "random" value */
1134 len = strlen(filename);
1135 memcpy(tempfilename, filename, len + 1);
1138 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
1139 reltid = syscall(SYS_gettid);
1141 gettimeofday(&tv, NULL);
1142 /* Promote to time_t; types differ on some OSes (like darwin) */
1143 unixtime = tv.tv_sec;
1145 sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
1148 TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
1150 if ((TmpFD < 0) || (errno != 0)) {
1151 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
1152 filename, strerror(errno));
1153 free_spoolcontrol_struct(scc);
1154 unlink(tempfilename);
1157 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
1159 /* Write out the listrecps while freeing from memory at the
1160 * same time. Am I clever or what? :)
1162 while (sc->listrecps != NULL) {
1163 StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
1164 nptr = sc->listrecps->next;
1165 free(sc->listrecps);
1166 sc->listrecps = nptr;
1168 /* Do the same for digestrecps */
1169 while (sc->digestrecps != NULL) {
1170 StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
1171 nptr = sc->digestrecps->next;
1172 free(sc->digestrecps);
1173 sc->digestrecps = nptr;
1175 /* Do the same for participates */
1176 while (sc->participates != NULL) {
1177 StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
1178 nptr = sc->participates->next;
1179 free(sc->participates);
1180 sc->participates = nptr;
1182 while (sc->ignet_push_shares != NULL) {
1183 StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1184 if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1185 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
1187 StrBufAppendPrintf(Cfg, "\n");
1188 mptr = sc->ignet_push_shares->next;
1189 free(sc->ignet_push_shares);
1190 sc->ignet_push_shares = mptr;
1192 if (sc->misc != NULL) {
1193 StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
1197 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
1198 if ((rc >=0 ) && (rc == StrLength(Cfg)))
1201 rename(tempfilename, filename);
1204 CtdlLogPrintf(CTDL_EMERG,
1205 "unable to write %s; [%s]; not enough space on the disk?\n",
1209 unlink(tempfilename);
1217 int is_recipient(SpoolControl *sc, const char *Name)
1223 nptr = sc->listrecps;
1224 while (nptr != NULL) {
1225 if (strncmp(Name, nptr->name, len)==0)
1229 /* Do the same for digestrecps */
1230 nptr = sc->digestrecps;
1231 while (nptr != NULL) {
1232 if (strncmp(Name, nptr->name, len)==0)
1236 /* Do the same for participates */
1237 nptr = sc->participates;
1238 while (nptr != NULL) {
1239 if (strncmp(Name, nptr->name, len)==0)
1248 * Batch up and send all outbound traffic from the current room
1250 void network_spoolout_room(char *room_to_spool) {
1252 char filename[PATH_MAX];
1257 * If the room doesn't exist, don't try to perform its networking tasks.
1258 * Normally this should never happen, but once in a while maybe a room gets
1259 * queued for networking and then deleted before it can happen.
1261 if (CtdlGetRoom(&CC->room, room_to_spool) != 0) {
1262 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1266 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1267 begin_critical_section(S_NETCONFIGS);
1269 /* Only do net processing for rooms that have netconfigs */
1270 if (!read_spoolcontrol_file(&sc, filename))
1272 end_critical_section(S_NETCONFIGS);
1275 CtdlLogPrintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
1277 /* If there are digest recipients, we have to build a digest */
1278 if (sc->digestrecps != NULL) {
1279 sc->digestfp = tmpfile();
1280 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1283 /* Do something useful */
1284 CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1285 network_spool_msg, sc);
1287 /* If we wrote a digest, deliver it and then close it */
1288 snprintf(buf, sizeof buf, "room_%s@%s",
1289 CC->room.QRname, config.c_fqdn);
1290 for (i=0; buf[i]; ++i) {
1291 buf[i] = tolower(buf[i]);
1292 if (isspace(buf[i])) buf[i] = '_';
1294 if (sc->digestfp != NULL) {
1295 fprintf(sc->digestfp, " -----------------------------------"
1296 "------------------------------------"
1298 "You are subscribed to the '%s' "
1300 "To post to the list: %s\n",
1301 CC->room.QRname, buf
1303 network_deliver_digest(sc); /* deliver and close */
1306 /* Now rewrite the config file */
1307 writenfree_spoolcontrol_file (&sc, filename);
1308 end_critical_section(S_NETCONFIGS);
1314 * Send the *entire* contents of the current room to one specific network node,
1315 * ignoring anything we know about which messages have already undergone
1316 * network processing. This can be used to bring a new node into sync.
1318 int network_sync_to(char *target_node) {
1320 int num_spooled = 0;
1326 char filename[PATH_MAX];
1329 /* Grab the configuration line we're looking for */
1330 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1331 begin_critical_section(S_NETCONFIGS);
1332 fp = fopen(filename, "r");
1334 end_critical_section(S_NETCONFIGS);
1337 while (fgets(buf, sizeof buf, fp) != NULL) {
1338 buf[strlen(buf)-1] = 0;
1339 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1340 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1341 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1342 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1343 && (!strcasecmp(sc_node, target_node)) ) {
1346 /* Concise syntax because we don't need a full linked-list */
1347 memset(&sc, 0, sizeof(SpoolControl));
1348 sc.ignet_push_shares = (maplist *)
1349 malloc(sizeof(maplist));
1350 sc.ignet_push_shares->next = NULL;
1351 safestrncpy(sc.ignet_push_shares->remote_nodename,
1353 sizeof sc.ignet_push_shares->remote_nodename);
1354 safestrncpy(sc.ignet_push_shares->remote_roomname,
1356 sizeof sc.ignet_push_shares->remote_roomname);
1360 end_critical_section(S_NETCONFIGS);
1362 if (!found_node) return(-1);
1364 /* Send ALL messages */
1365 num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1366 network_spool_msg, &sc);
1368 /* Concise cleanup because we know there's only one node in the sc */
1369 free(sc.ignet_push_shares);
1371 CtdlLogPrintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1372 num_spooled, target_node);
1373 return(num_spooled);
1378 * Implements the NSYN command
1380 void cmd_nsyn(char *argbuf) {
1382 char target_node[256];
1384 if (CtdlAccessCheck(ac_aide)) return;
1386 extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1387 num_spooled = network_sync_to(target_node);
1388 if (num_spooled >= 0) {
1389 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1392 cprintf("%d No such room/node share exists.\n",
1393 ERROR + ROOM_NOT_FOUND);
1400 * Batch up and send all outbound traffic from the current room
1402 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1403 struct RoomProcList *ptr;
1405 ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1406 if (ptr == NULL) return;
1408 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1409 begin_critical_section(S_RPLIST);
1412 end_critical_section(S_RPLIST);
1415 void destroy_network_queue_room(void)
1417 struct RoomProcList *cur, *p;
1418 NetMap *nmcur, *nmp;
1421 begin_critical_section(S_RPLIST);
1429 end_critical_section(S_RPLIST);
1432 while (nmcur != NULL)
1439 if (working_ignetcfg != NULL)
1440 free (working_ignetcfg);
1441 working_ignetcfg = NULL;
1446 * Learn topology from path fields
1448 void network_learn_topology(char *node, char *path) {
1452 strcpy(nexthop, "");
1454 if (num_tokens(path, '!') < 3) return;
1455 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1456 if (!strcasecmp(nmptr->nodename, node)) {
1457 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1458 nmptr->lastcontact = time(NULL);
1464 /* If we got here then it's not in the map, so add it. */
1465 nmptr = (NetMap *) malloc(sizeof (NetMap));
1466 strcpy(nmptr->nodename, node);
1467 nmptr->lastcontact = time(NULL);
1468 extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1469 nmptr->next = the_netmap;
1478 * Bounce a message back to the sender
1480 void network_bounce(struct CtdlMessage *msg, char *reason) {
1481 char *oldpath = NULL;
1483 char bouncesource[SIZ];
1484 char recipient[SIZ];
1485 struct recptypes *valid = NULL;
1486 char force_room[ROOMNAMELEN];
1487 static int serialnum = 0;
1490 CtdlLogPrintf(CTDL_DEBUG, "entering network_bounce()\n");
1492 if (msg == NULL) return;
1494 snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1497 * Give it a fresh message ID
1499 if (msg->cm_fields['I'] != NULL) {
1500 free(msg->cm_fields['I']);
1502 snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1503 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1504 msg->cm_fields['I'] = strdup(buf);
1507 * FIXME ... right now we're just sending a bounce; we really want to
1508 * include the text of the bounced message.
1510 if (msg->cm_fields['M'] != NULL) {
1511 free(msg->cm_fields['M']);
1513 msg->cm_fields['M'] = strdup(reason);
1514 msg->cm_format_type = 0;
1517 * Turn the message around
1519 if (msg->cm_fields['R'] == NULL) {
1520 free(msg->cm_fields['R']);
1523 if (msg->cm_fields['D'] == NULL) {
1524 free(msg->cm_fields['D']);
1527 snprintf(recipient, sizeof recipient, "%s@%s",
1528 msg->cm_fields['A'], msg->cm_fields['N']);
1530 if (msg->cm_fields['A'] == NULL) {
1531 free(msg->cm_fields['A']);
1534 if (msg->cm_fields['N'] == NULL) {
1535 free(msg->cm_fields['N']);
1538 if (msg->cm_fields['U'] == NULL) {
1539 free(msg->cm_fields['U']);
1542 msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1543 msg->cm_fields['N'] = strdup(config.c_nodename);
1544 msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1546 /* prepend our node to the path */
1547 if (msg->cm_fields['P'] != NULL) {
1548 oldpath = msg->cm_fields['P'];
1549 msg->cm_fields['P'] = NULL;
1552 oldpath = strdup("unknown_user");
1554 size = strlen(oldpath) + SIZ;
1555 msg->cm_fields['P'] = malloc(size);
1556 snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1559 /* Now submit the message */
1560 valid = validate_recipients(recipient, NULL, 0);
1561 if (valid != NULL) if (valid->num_error != 0) {
1562 free_recipients(valid);
1565 if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1566 strcpy(force_room, config.c_aideroom);
1569 strcpy(force_room, "");
1571 if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1572 strcpy(force_room, config.c_aideroom);
1574 CtdlSubmitMsg(msg, valid, force_room, 0);
1577 if (valid != NULL) free_recipients(valid);
1578 CtdlFreeMessage(msg);
1579 CtdlLogPrintf(CTDL_DEBUG, "leaving network_bounce()\n");
1586 * Process a buffer containing a single message from a single file
1587 * from the inbound queue
1589 void network_process_buffer(char *buffer, long size) {
1590 struct CtdlMessage *msg = NULL;
1593 struct recptypes *recp = NULL;
1594 char target_room[ROOMNAMELEN];
1595 struct ser_ret sermsg;
1596 char *oldpath = NULL;
1597 char filename[PATH_MAX];
1600 unsigned char firstbyte;
1601 unsigned char lastbyte;
1603 CtdlLogPrintf(CTDL_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
1605 /* Validate just a little bit. First byte should be FF and * last byte should be 00. */
1606 firstbyte = buffer[0];
1607 lastbyte = buffer[size-1];
1608 if ( (firstbyte != 255) || (lastbyte != 0) ) {
1609 CtdlLogPrintf(CTDL_ERR, "Corrupt message ignored. Length=%ld, firstbyte = %d, lastbyte = %d\n",
1610 size, firstbyte, lastbyte);
1614 /* Set default target room to trash */
1615 strcpy(target_room, TWITROOM);
1617 /* Load the message into memory */
1618 msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1619 memset(msg, 0, sizeof(struct CtdlMessage));
1620 msg->cm_magic = CTDLMESSAGE_MAGIC;
1621 msg->cm_anon_type = buffer[1];
1622 msg->cm_format_type = buffer[2];
1624 for (pos = 3; pos < size; ++pos) {
1625 field = buffer[pos];
1626 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1627 pos = pos + strlen(&buffer[(int)pos]);
1630 /* Check for message routing */
1631 if (msg->cm_fields['D'] != NULL) {
1632 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1634 /* route the message */
1635 strcpy(nexthop, "");
1636 if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1637 /* prepend our node to the path */
1638 if (msg->cm_fields['P'] != NULL) {
1639 oldpath = msg->cm_fields['P'];
1640 msg->cm_fields['P'] = NULL;
1643 oldpath = strdup("unknown_user");
1645 size = strlen(oldpath) + SIZ;
1646 msg->cm_fields['P'] = malloc(size);
1647 snprintf(msg->cm_fields['P'], size, "%s!%s",
1648 config.c_nodename, oldpath);
1651 /* serialize the message */
1652 serialize_message(&sermsg, msg);
1655 if (IsEmptyStr(nexthop)) {
1656 strcpy(nexthop, msg->cm_fields['D']);
1666 CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
1667 fp = fopen(filename, "ab");
1669 fwrite(sermsg.ser, sermsg.len, 1, fp);
1673 CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1676 CtdlFreeMessage(msg);
1680 else { /* invalid destination node name */
1683 "A message you sent could not be delivered due to an invalid destination node"
1684 " name. Please check the address and try sending the message again.\n");
1693 * Check to see if we already have a copy of this message, and
1694 * abort its processing if so. (We used to post a warning to Aide>
1695 * every time this happened, but the network is now so densely
1696 * connected that it's inevitable.)
1698 if (network_usetable(msg) != 0) {
1699 CtdlFreeMessage(msg);
1703 /* Learn network topology from the path */
1704 if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1705 network_learn_topology(msg->cm_fields['N'], msg->cm_fields['P']);
1708 /* Is the sending node giving us a very persuasive suggestion about
1709 * which room this message should be saved in? If so, go with that.
1711 if (msg->cm_fields['C'] != NULL) {
1712 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
1715 /* Otherwise, does it have a recipient? If so, validate it... */
1716 else if (msg->cm_fields['R'] != NULL) {
1717 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1718 if (recp != NULL) if (recp->num_error != 0) {
1720 "A message you sent could not be delivered due to an invalid address.\n"
1721 "Please check the address and try sending the message again.\n");
1723 free_recipients(recp);
1724 CtdlLogPrintf(CTDL_DEBUG, "Bouncing message due to invalid recipient address.\n");
1727 strcpy(target_room, ""); /* no target room if mail */
1730 /* Our last shot at finding a home for this message is to see if
1731 * it has the O field (Originating room) set.
1733 else if (msg->cm_fields['O'] != NULL) {
1734 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
1737 /* Strip out fields that are only relevant during transit */
1738 if (msg->cm_fields['D'] != NULL) {
1739 free(msg->cm_fields['D']);
1740 msg->cm_fields['D'] = NULL;
1742 if (msg->cm_fields['C'] != NULL) {
1743 free(msg->cm_fields['C']);
1744 msg->cm_fields['C'] = NULL;
1747 /* save the message into a room */
1748 if (PerformNetprocHooks(msg, target_room) == 0) {
1749 msg->cm_flags = CM_SKIP_HOOKS;
1750 CtdlSubmitMsg(msg, recp, target_room, 0);
1752 CtdlFreeMessage(msg);
1753 free_recipients(recp);
1758 * Process a single message from a single file from the inbound queue
1760 void network_process_message(FILE *fp, long msgstart, long msgend) {
1765 hold_pos = ftell(fp);
1766 size = msgend - msgstart + 1;
1767 buffer = malloc(size);
1768 if (buffer != NULL) {
1769 fseek(fp, msgstart, SEEK_SET);
1770 if (fread(buffer, size, 1, fp) > 0) {
1771 network_process_buffer(buffer, size);
1776 fseek(fp, hold_pos, SEEK_SET);
1781 * Process a single file from the inbound queue
1783 void network_process_file(char *filename) {
1785 long msgstart = (-1L);
1786 long msgend = (-1L);
1791 fp = fopen(filename, "rb");
1793 CtdlLogPrintf(CTDL_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1797 fseek(fp, 0L, SEEK_END);
1798 CtdlLogPrintf(CTDL_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1801 /* Look for messages in the data stream and break them out */
1802 while (ch = getc(fp), ch >= 0) {
1805 if (msgstart >= 0L) {
1806 msgend = msgcur - 1;
1807 network_process_message(fp, msgstart, msgend);
1815 msgend = msgcur - 1;
1816 if (msgstart >= 0L) {
1817 network_process_message(fp, msgstart, msgend);
1826 * Process anything in the inbound queue
1828 void network_do_spoolin(void) {
1831 struct stat statbuf;
1832 char filename[PATH_MAX];
1833 static time_t last_spoolin_mtime = 0L;
1836 * Check the spoolin directory's modification time. If it hasn't
1837 * been touched, we don't need to scan it.
1839 if (stat(ctdl_netin_dir, &statbuf)) return;
1840 if (statbuf.st_mtime == last_spoolin_mtime) {
1841 CtdlLogPrintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1844 last_spoolin_mtime = statbuf.st_mtime;
1845 CtdlLogPrintf(CTDL_DEBUG, "network: processing inbound queue\n");
1848 * Ok, there's something interesting in there, so scan it.
1850 dp = opendir(ctdl_netin_dir);
1851 if (dp == NULL) return;
1853 while (d = readdir(dp), d != NULL) {
1854 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1861 network_process_file(filename);
1869 * Step 1: consolidate files in the outbound queue into one file per neighbor node
1870 * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
1872 void network_consolidate_spoolout(void) {
1875 char filename[PATH_MAX];
1881 /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
1882 dp = opendir(ctdl_netout_dir);
1883 if (dp == NULL) return;
1884 while (d = readdir(dp), d != NULL) {
1886 (strcmp(d->d_name, "."))
1887 && (strcmp(d->d_name, ".."))
1888 && (strchr(d->d_name, '@') != NULL)
1890 safestrncpy(nexthop, d->d_name, sizeof nexthop);
1891 ptr = strchr(nexthop, '@');
1901 CtdlLogPrintf(CTDL_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
1902 if (network_talking_to(nexthop, NTT_CHECK)) {
1903 CtdlLogPrintf(CTDL_DEBUG,
1904 "Currently online with %s - skipping for now\n",
1909 network_talking_to(nexthop, NTT_ADD);
1910 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
1912 ctdl_netout_dir, nexthop,
1916 network_talking_to(nexthop, NTT_REMOVE);
1922 /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1924 dp = opendir(ctdl_netout_dir);
1925 if (dp == NULL) return;
1927 while (d = readdir(dp), d != NULL) {
1928 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1930 ptr = strchr(d->d_name, '@');
1940 strcpy(nexthop, "");
1941 i = is_valid_node(nexthop, NULL, d->d_name);
1943 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1954 * receive network spool from the remote system
1956 void receive_spool(int *sock, char *remote_nodename) {
1957 int download_len = 0L;
1958 int bytes_received = 0L;
1960 char tempfilename[PATH_MAX];
1961 char permfilename[PATH_MAX];
1965 snprintf(tempfilename,
1966 sizeof tempfilename,
1974 snprintf(permfilename,
1975 sizeof permfilename,
1983 if (sock_puts(sock, "NDOP") < 0) return;
1984 if (sock_getln(sock, buf, sizeof buf) < 0) return;
1985 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1986 if (buf[0] != '2') {
1990 download_len = extract_long(&buf[4], 0);
1991 if (download_len <= 0) {
1995 bytes_received = 0L;
1996 fp = fopen(tempfilename, "w");
1998 CtdlLogPrintf(CTDL_CRIT, "Cannot create %s: %s\n", tempfilename, strerror(errno));
2002 CtdlLogPrintf(CTDL_DEBUG, "Expecting to transfer %d bytes\n", download_len);
2003 while (bytes_received < download_len) {
2005 * If shutting down we can exit here and unlink the temp file.
2006 * this shouldn't loose us any messages.
2008 if (CtdlThreadCheckStop())
2011 unlink(tempfilename);
2014 snprintf(buf, sizeof buf, "READ %d|%d",
2016 ((download_len - bytes_received > IGNET_PACKET_SIZE)
2017 ? IGNET_PACKET_SIZE : (download_len - bytes_received))
2020 if (sock_puts(sock, buf) < 0) {
2022 unlink(tempfilename);
2025 if (sock_getln(sock, buf, sizeof buf) < 0) {
2027 unlink(tempfilename);
2031 if (buf[0] == '6') {
2032 plen = extract_int(&buf[4], 0);
2033 StrBuf *pbuf = NewStrBuf();
2034 if (socket_read_blob(sock, pbuf, plen, CLIENT_TIMEOUT) != plen) {
2035 CtdlLogPrintf(CTDL_INFO, "Short read from peer; aborting.\n");
2037 unlink(tempfilename);
2041 fwrite(ChrPtr(pbuf), plen, 1, fp);
2042 bytes_received += plen;
2049 /* Last chance for shutdown exit */
2050 if (CtdlThreadCheckStop())
2052 unlink(tempfilename);
2056 if (sock_puts(sock, "CLOS") < 0) {
2057 unlink(tempfilename);
2062 * From here on we must complete or messages will get lost
2064 if (sock_getln(sock, buf, sizeof buf) < 0) {
2065 unlink(tempfilename);
2069 CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
2072 * Now move the temp file to its permanent location.
2074 if (link(tempfilename, permfilename) != 0) {
2075 CtdlLogPrintf(CTDL_ALERT, "Could not link %s to %s: %s\n",
2076 tempfilename, permfilename, strerror(errno)
2080 unlink(tempfilename);
2086 * transmit network spool to the remote system
2088 void transmit_spool(int *sock, char *remote_nodename)
2093 long bytes_to_write, thisblock, bytes_written;
2097 if (sock_puts(sock, "NUOP") < 0) return;
2098 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2099 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2100 if (buf[0] != '2') {
2104 snprintf(sfname, sizeof sfname,
2109 fd = open(sfname, O_RDONLY);
2111 if (errno != ENOENT) {
2112 CtdlLogPrintf(CTDL_CRIT, "cannot open %s: %s\n", sfname, strerror(errno));
2117 while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
2118 bytes_to_write = plen;
2119 while (bytes_to_write > 0L) {
2120 /* Exit if shutting down */
2121 if (CtdlThreadCheckStop())
2127 snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
2128 if (sock_puts(sock, buf) < 0) {
2132 if (sock_getln(sock, buf, sizeof buf) < 0) {
2136 thisblock = atol(&buf[4]);
2137 if (buf[0] == '7') {
2138 if (sock_write(sock, pbuf, (int) thisblock) < 0) {
2142 bytes_to_write -= thisblock;
2143 bytes_written += thisblock;
2153 /* Last chance for shutdown exit */
2154 if(CtdlThreadCheckStop())
2157 if (sock_puts(sock, "UCLS 1") < 0) return;
2160 * From here on we must complete or messages will get lost
2162 if (sock_getln(sock, buf, sizeof buf) < 0) return;
2163 CtdlLogPrintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n", bytes_written, remote_nodename);
2164 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2165 if (buf[0] == '2') {
2166 CtdlLogPrintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
2174 * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
2176 void network_poll_node(char *node, char *secret, char *host, char *port) {
2180 char connected_to[SIZ];
2183 if (network_talking_to(node, NTT_CHECK)) return;
2184 network_talking_to(node, NTT_ADD);
2185 CtdlLogPrintf(CTDL_DEBUG, "network: polling <%s>\n", node);
2186 CtdlLogPrintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
2188 sock = sock_connect(host, port, "tcp");
2190 CtdlLogPrintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
2191 network_talking_to(node, NTT_REMOVE);
2195 CtdlLogPrintf(CTDL_DEBUG, "Connected!\n");
2196 CCC->sReadBuf = NewStrBuf();
2197 CCC->sMigrateBuf = NewStrBuf();
2200 /* Read the server greeting */
2201 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2202 CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
2204 /* Check that the remote is who we think it is and warn the Aide if not */
2205 extract_token (connected_to, buf, 1, ' ', sizeof connected_to);
2206 if (strcmp(connected_to, node))
2208 snprintf(err_buf, sizeof(err_buf),
2209 "Connected to node \"%s\" but I was expecting to connect to node \"%s\".",
2212 CtdlLogPrintf(CTDL_ERR, "%s\n", err_buf);
2213 CtdlAideMessage(err_buf, "Network error");
2216 /* We're talking to the correct node. Now identify ourselves. */
2217 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
2218 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2219 if (sock_puts(&sock, buf) <0) goto bail;
2220 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2221 CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
2222 if (buf[0] != '2') {
2226 /* At this point we are authenticated. */
2227 if (!CtdlThreadCheckStop())
2228 receive_spool(&sock, node);
2229 if (!CtdlThreadCheckStop())
2230 transmit_spool(&sock, node);
2233 sock_puts(&sock, "QUIT");
2235 FreeStrBuf(&CCC->sReadBuf);
2236 FreeStrBuf(&CCC->sMigrateBuf);
2239 network_talking_to(node, NTT_REMOVE);
2245 * Poll other Citadel nodes and transfer inbound/outbound network data.
2246 * Set "full" to nonzero to force a poll of every node, or to zero to poll
2247 * only nodes to which we have data to send.
2249 void network_poll_other_citadel_nodes(int full_poll) {
2257 char spoolfile[256];
2259 if (working_ignetcfg == NULL) {
2260 CtdlLogPrintf(CTDL_DEBUG, "network: no neighbor nodes are configured - not polling.\n");
2264 /* Use the string tokenizer to grab one line at a time */
2265 for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2266 if(CtdlThreadCheckStop())
2268 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2269 extract_token(node, linebuf, 0, '|', sizeof node);
2270 extract_token(secret, linebuf, 1, '|', sizeof secret);
2271 extract_token(host, linebuf, 2, '|', sizeof host);
2272 extract_token(port, linebuf, 3, '|', sizeof port);
2273 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2274 && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2283 if (access(spoolfile, R_OK) == 0) {
2288 network_poll_node(node, secret, host, port);
2299 * It's ok if these directories already exist. Just fail silently.
2301 void create_spool_dirs(void) {
2302 if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
2303 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
2304 if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
2305 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
2306 if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
2307 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
2308 if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
2309 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
2310 if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
2311 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2312 if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
2313 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2314 if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
2315 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
2316 if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
2317 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
2325 * network_do_queue()
2327 * Run through the rooms doing various types of network stuff.
2329 void *network_do_queue(void *args) {
2330 static time_t last_run = 0L;
2331 struct RoomProcList *ptr;
2332 int full_processing = 1;
2333 struct CitContext networkerCC;
2335 /* Give the networker its own private CitContext */
2336 CtdlFillSystemContext(&networkerCC, "network");
2337 citthread_setspecific(MyConKey, (void *)&networkerCC );
2340 * Run the full set of processing tasks no more frequently
2341 * than once every n seconds
2343 if ( (time(NULL) - last_run) < config.c_net_freq ) {
2344 full_processing = 0;
2345 CtdlLogPrintf(CTDL_DEBUG, "Network full processing in %ld seconds.\n",
2346 config.c_net_freq - (time(NULL)- last_run)
2351 * This is a simple concurrency check to make sure only one queue run
2352 * is done at a time. We could do this with a mutex, but since we
2353 * don't really require extremely fine granularity here, we'll do it
2354 * with a static variable instead.
2357 CtdlClearSystemContext();
2362 /* Load the IGnet Configuration into memory */
2363 load_working_ignetcfg();
2366 * Poll other Citadel nodes. Maybe. If "full_processing" is set
2367 * then we poll everyone. Otherwise we only poll nodes we have stuff
2370 network_poll_other_citadel_nodes(full_processing);
2373 * Load the network map and filter list into memory.
2376 filterlist = load_filter_list();
2379 * Go ahead and run the queue
2381 if (full_processing && !CtdlThreadCheckStop()) {
2382 CtdlLogPrintf(CTDL_DEBUG, "network: loading outbound queue\n");
2383 CtdlForEachRoom(network_queue_room, NULL);
2386 if (rplist != NULL) {
2387 CtdlLogPrintf(CTDL_DEBUG, "network: running outbound queue\n");
2388 while (rplist != NULL && !CtdlThreadCheckStop()) {
2389 char spoolroomname[ROOMNAMELEN];
2390 safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2391 begin_critical_section(S_RPLIST);
2393 /* pop this record off the list */
2395 rplist = rplist->next;
2398 /* invalidate any duplicate entries to prevent double processing */
2399 for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2400 if (!strcasecmp(ptr->name, spoolroomname)) {
2405 end_critical_section(S_RPLIST);
2406 if (spoolroomname[0] != 0) {
2407 network_spoolout_room(spoolroomname);
2412 /* If there is anything in the inbound queue, process it */
2413 if (!CtdlThreadCheckStop()) {
2414 network_do_spoolin();
2417 /* Save the network map back to disk */
2418 write_network_map();
2420 /* Free the filter list in memory */
2421 free_filter_list(filterlist);
2424 network_consolidate_spoolout();
2426 CtdlLogPrintf(CTDL_DEBUG, "network: queue run completed\n");
2428 if (full_processing) {
2429 last_run = time(NULL);
2434 /* Reschedule this task to happen again periodically, unless the thread system indicates
2435 * that the server is shutting down.
2437 if (!CtdlThreadCheckStop()) {
2438 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK,
2439 network_do_queue, NULL, time(NULL) + 60
2443 CtdlLogPrintf(CTDL_DEBUG, "network: Task STOPPED.\n");
2445 CtdlClearSystemContext();
2451 * cmd_netp() - authenticate to the server as another Citadel node polling
2452 * for network traffic
2454 void cmd_netp(char *cmdbuf)
2465 extract_token(node, cmdbuf, 0, '|', sizeof node);
2466 extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2468 /* load the IGnet Configuration to check node validity */
2469 load_working_ignetcfg();
2470 v = is_valid_node(nexthop, secret, node);
2473 snprintf(err_buf, sizeof err_buf,
2474 "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
2475 node, CC->cs_host, CC->cs_addr
2477 CtdlLogPrintf(CTDL_WARNING, "%s", err_buf);
2478 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2479 CtdlAideMessage(err_buf, "IGNet Networking.");
2483 if (strcasecmp(pass, secret)) {
2484 snprintf(err_buf, sizeof err_buf,
2485 "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
2486 CC->cs_host, CC->cs_addr, node
2488 CtdlLogPrintf(CTDL_WARNING, "%s", err_buf);
2489 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2490 CtdlAideMessage(err_buf, "IGNet Networking.");
2494 if (network_talking_to(node, NTT_CHECK)) {
2495 CtdlLogPrintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2496 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2500 safestrncpy(CC->net_node, node, sizeof CC->net_node);
2501 network_talking_to(node, NTT_ADD);
2502 CtdlLogPrintf(CTDL_NOTICE, "Network node <%s> logged in from %s [%s]\n",
2503 CC->net_node, CC->cs_host, CC->cs_addr
2505 cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
2509 int network_room_handler (struct ctdlroom *room)
2511 network_queue_room(room, NULL);
2517 * Module entry point
2519 CTDL_MODULE_INIT(network)
2523 create_spool_dirs();
2524 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2525 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2526 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2527 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2528 CtdlRegisterRoomHook(network_room_handler);
2529 CtdlRegisterCleanupHook(destroy_network_queue_room);
2532 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, 0);
2533 /* return our Subversion id for the Log */