4 * This module handles shared rooms, inter-Citadel mail, and outbound
5 * mailing list processing.
7 * Copyright (C) 2000-2002 by Art Cancro and others.
8 * This code is released under the terms of the GNU General Public License.
10 * ** NOTE ** A word on the S_NETCONFIGS semaphore:
11 * This is a fairly high-level type of critical section. It ensures that no
12 * two threads work on the netconfigs files at the same time. Since we do
13 * so many things inside these, here are the rules:
14 * 1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
15 * 2. Do *not* perform any I/O with the client during these sections.
20 * Duration of time (in seconds) after which pending list subscribe/unsubscribe
21 * requests that have not been confirmed will be deleted.
23 #define EXP 259200 /* three days */
34 #include <sys/types.h>
36 #if TIME_WITH_SYS_TIME
37 # include <sys/time.h>
41 # include <sys/time.h>
52 #include "sysdep_decls.h"
53 #include "citserver.h"
56 #include "serv_extensions.h"
63 #include "internet_addressing.h"
64 #include "serv_network.h"
65 #include "clientsocket.h"
72 /* Nonzero while we are doing outbound network processing */
73 static int doing_queue = 0;
76 * When we do network processing, it's accomplished in two passes; one to
77 * gather a list of rooms and one to actually do them. It's ok that rplist
78 * is global; this process *only* runs as part of the housekeeping loop and
79 * therefore only one will run at a time.
81 struct RoomProcList *rplist = NULL;
84 * We build a map of network nodes during processing.
86 struct NetMap *the_netmap = NULL;
89 * Keep track of what messages to reject
91 struct FilterList *load_filter_list(void) {
92 char *serialized_list = NULL;
95 struct FilterList *newlist = NULL;
96 struct FilterList *nptr;
98 serialized_list = CtdlGetSysConfig(FILTERLIST);
99 if (serialized_list == NULL) return(NULL); /* if null, no entries */
101 /* Use the string tokenizer to grab one line at a time */
102 for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
103 extract_token(buf, serialized_list, i, '\n');
104 nptr = (struct FilterList *) mallok(sizeof(struct FilterList));
105 extract(nptr->fl_user, buf, 0);
106 striplt(nptr->fl_user);
107 extract(nptr->fl_room, buf, 1);
108 striplt(nptr->fl_room);
109 extract(nptr->fl_node, buf, 2);
110 striplt(nptr->fl_node);
112 /* Cowardly refuse to add an any/any/any entry that would
113 * end up filtering every single message.
115 if (strlen(nptr->fl_user) + strlen(nptr->fl_room)
116 + strlen(nptr->fl_node) == 0) {
120 nptr->next = newlist;
125 phree(serialized_list);
130 void free_filter_list(struct FilterList *fl) {
131 if (fl == NULL) return;
132 free_filter_list(fl->next);
139 * Check the use table. This is a list of messages which have recently
140 * arrived on the system. It is maintained and queried to prevent the same
141 * message from being entered into the database multiple times if it happens
142 * to arrive multiple times by accident.
144 int network_usetable(struct CtdlMessage *msg) {
147 struct cdbdata *cdbut;
150 /* Bail out if we can't generate a message ID */
154 if (msg->cm_fields['I'] == NULL) {
157 if (strlen(msg->cm_fields['I']) == 0) {
161 /* Generate the message ID */
162 strcpy(msgid, msg->cm_fields['I']);
163 if (haschar(msgid, '@') == 0) {
165 if (msg->cm_fields['N'] != NULL) {
166 strcat(msgid, msg->cm_fields['N']);
173 cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
179 /* If we got to this point, it's unique: add it. */
180 strcpy(ut.ut_msgid, msgid);
181 ut.ut_timestamp = time(NULL);
182 cdb_store(CDB_USETABLE, msgid, strlen(msgid),
183 &ut, sizeof(struct UseTable) );
189 * Read the network map from its configuration file into memory.
191 void read_network_map(void) {
192 char *serialized_map = NULL;
195 struct NetMap *nmptr;
197 serialized_map = CtdlGetSysConfig(IGNETMAP);
198 if (serialized_map == NULL) return; /* if null, no entries */
200 /* Use the string tokenizer to grab one line at a time */
201 for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
202 extract_token(buf, serialized_map, i, '\n');
203 nmptr = (struct NetMap *) mallok(sizeof(struct NetMap));
204 extract(nmptr->nodename, buf, 0);
205 nmptr->lastcontact = extract_long(buf, 1);
206 extract(nmptr->nexthop, buf, 2);
207 nmptr->next = the_netmap;
211 phree(serialized_map);
216 * Write the network map from memory back to the configuration file.
218 void write_network_map(void) {
219 char *serialized_map = NULL;
220 struct NetMap *nmptr;
222 serialized_map = strdoop("");
224 if (the_netmap != NULL) {
225 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
226 serialized_map = reallok(serialized_map,
227 (strlen(serialized_map)+SIZ) );
228 if (strlen(nmptr->nodename) > 0) {
229 snprintf(&serialized_map[strlen(serialized_map)],
233 (long)nmptr->lastcontact,
239 CtdlPutSysConfig(IGNETMAP, serialized_map);
240 phree(serialized_map);
242 /* Now free the list */
243 while (the_netmap != NULL) {
244 nmptr = the_netmap->next;
253 * Check the network map and determine whether the supplied node name is
254 * valid. If it is not a neighbor node, supply the name of a neighbor node
255 * which is the next hop. If it *is* a neighbor node, we also fill in the
258 int is_valid_node(char *nexthop, char *secret, char *node) {
259 char *ignetcfg = NULL;
264 struct NetMap *nmptr;
271 * First try the neighbor nodes
273 ignetcfg = CtdlGetSysConfig(IGNETCFG);
274 if (ignetcfg == NULL) {
275 if (nexthop != NULL) {
282 if (nexthop != NULL) {
286 /* Use the string tokenizer to grab one line at a time */
287 for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
288 extract_token(linebuf, ignetcfg, i, '\n');
289 extract(buf, linebuf, 0);
290 if (!strcasecmp(buf, node)) {
291 if (nexthop != NULL) {
294 if (secret != NULL) {
295 extract(secret, linebuf, 1);
303 return(retval); /* yup, it's a direct neighbor */
307 * If we get to this point we have to see if we know the next hop
309 if (the_netmap != NULL) {
310 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
311 if (!strcasecmp(nmptr->nodename, node)) {
312 if (nexthop != NULL) {
313 strcpy(nexthop, nmptr->nexthop);
321 * If we get to this point, the supplied node name is bogus.
323 lprintf(5, "Invalid node name <%s>\n", node);
331 void cmd_gnet(char *argbuf) {
336 if (CtdlAccessCheck(ac_room_aide)) return;
337 assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
338 cprintf("%d Network settings for room #%ld <%s>\n",
340 CC->room.QRnumber, CC->room.QRname);
342 fp = fopen(filename, "r");
344 while (fgets(buf, sizeof buf, fp) != NULL) {
345 buf[strlen(buf)-1] = 0;
346 cprintf("%s\n", buf);
355 void cmd_snet(char *argbuf) {
356 char tempfilename[SIZ];
361 if (CtdlAccessCheck(ac_room_aide)) return;
362 safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
363 assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
365 fp = fopen(tempfilename, "w");
367 cprintf("%d Cannot open %s: %s\n",
368 ERROR+INTERNAL_ERROR,
373 cprintf("%d %s\n", SEND_LISTING, tempfilename);
374 while (client_gets(buf), strcmp(buf, "000")) {
375 fprintf(fp, "%s\n", buf);
379 /* Now copy the temp file to its permanent location
380 * (We use /bin/mv instead of link() because they may be on
381 * different filesystems)
384 snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
385 begin_critical_section(S_NETCONFIGS);
387 end_critical_section(S_NETCONFIGS);
392 * Spools out one message from the list.
394 void network_spool_msg(long msgnum, void *userdata) {
395 struct SpoolControl *sc;
398 char *newpath = NULL;
400 size_t instr_len = SIZ;
401 struct CtdlMessage *msg = NULL;
402 struct CtdlMessage *imsg;
403 struct namelist *nptr;
404 struct ser_ret sermsg;
410 int delete_after_send = 0; /* Set to 1 to delete after spooling */
412 sc = (struct SpoolControl *)userdata;
415 * Process mailing list recipients
417 if (sc->listrecps != NULL) {
419 /* First, copy it to the spoolout room */
420 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
421 if (err != 0) return;
424 * Figure out how big a buffer we need to allocate
426 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
427 instr_len = instr_len + strlen(nptr->name);
433 lprintf(9, "Generating delivery instructions\n");
434 instr = mallok(instr_len);
436 lprintf(1, "Cannot allocate %ld bytes for instr...\n",
440 snprintf(instr, instr_len,
441 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
442 "bounceto|postmaster@%s\n" ,
443 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
445 /* Generate delivery instructions for each recipient */
446 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
447 size_t tmp = strlen(instr);
448 snprintf(&instr[tmp], instr_len - tmp,
449 "remote|%s|0||\n", nptr->name);
453 * Generate a message from the instructions
455 imsg = mallok(sizeof(struct CtdlMessage));
456 memset(imsg, 0, sizeof(struct CtdlMessage));
457 imsg->cm_magic = CTDLMESSAGE_MAGIC;
458 imsg->cm_anon_type = MES_NORMAL;
459 imsg->cm_format_type = FMT_RFC822;
460 imsg->cm_fields['A'] = strdoop("Citadel");
461 imsg->cm_fields['M'] = instr;
463 /* Save delivery instructions in spoolout room */
464 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
465 CtdlFreeMessage(imsg);
469 * Process digest recipients
471 if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
472 fprintf(sc->digestfp, " -----------------------------------"
473 "------------------------------------"
475 CtdlRedirectOutput(sc->digestfp, -1);
476 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 0);
477 CtdlRedirectOutput(NULL, -1);
478 sc->num_msgs_spooled += 1;
482 * Process IGnet push shares
484 if (sc->ignet_push_shares != NULL) {
486 msg = CtdlFetchMessage(msgnum);
490 /* Prepend our node name to the Path field whenever
491 * sending a message to another IGnet node
493 if (msg->cm_fields['P'] == NULL) {
494 msg->cm_fields['P'] = strdoop("username");
496 newpath_len = strlen(msg->cm_fields['P']) +
497 strlen(config.c_nodename) + 2;
498 newpath = mallok(newpath_len);
499 snprintf(newpath, newpath_len, "%s!%s",
500 config.c_nodename, msg->cm_fields['P']);
501 phree(msg->cm_fields['P']);
502 msg->cm_fields['P'] = newpath;
505 * Force the message to appear in the correct room
506 * on the far end by setting the C field correctly
508 if (msg->cm_fields['C'] != NULL) {
509 phree(msg->cm_fields['C']);
511 msg->cm_fields['C'] = strdoop(CC->room.QRname);
514 * Determine if this message is set to be deleted
515 * after sending out on the network
517 if (msg->cm_fields['S'] != NULL) {
518 if (!strcasecmp(msg->cm_fields['S'],
520 delete_after_send = 1;
525 * Now serialize it for transmission
527 serialize_message(&sermsg, msg);
529 /* Now send it to every node */
530 for (nptr = sc->ignet_push_shares; nptr != NULL;
535 /* Check for valid node name */
536 if (is_valid_node(NULL,NULL,nptr->name) != 0) {
537 lprintf(3, "Invalid node <%s>\n",
542 /* Check for split horizon */
543 lprintf(9, "Path is %s\n", msg->cm_fields['P']);
544 bang = num_tokens(msg->cm_fields['P'], '!');
545 if (bang > 1) for (i=0; i<(bang-1); ++i) {
546 extract_token(buf, msg->cm_fields['P'],
548 if (!strcasecmp(buf, nptr->name)) {
553 /* Send the message */
555 snprintf(filename, sizeof filename,
556 "./network/spoolout/%s",
558 fp = fopen(filename, "ab");
567 CtdlFreeMessage(msg);
571 /* update lastsent */
572 sc->lastsent = msgnum;
574 /* Delete this message if delete-after-send is set */
575 if (delete_after_send) {
576 CtdlDeleteMessages(CC->room.QRname, msgnum, "");
583 * Deliver digest messages
585 void network_deliver_digest(struct SpoolControl *sc) {
588 struct CtdlMessage *msg;
592 size_t instr_len = SIZ;
593 struct CtdlMessage *imsg;
594 struct namelist *nptr;
596 if (sc->num_msgs_spooled < 1) {
597 fclose(sc->digestfp);
602 msg = mallok(sizeof(struct CtdlMessage));
603 memset(msg, 0, sizeof(struct CtdlMessage));
604 msg->cm_magic = CTDLMESSAGE_MAGIC;
605 msg->cm_format_type = FMT_RFC822;
606 msg->cm_anon_type = MES_NORMAL;
608 sprintf(buf, "%ld", time(NULL));
609 msg->cm_fields['T'] = strdoop(buf);
610 msg->cm_fields['A'] = strdoop(CC->room.QRname);
611 msg->cm_fields['U'] = strdoop(CC->room.QRname);
612 sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
613 for (i=0; i<strlen(buf); ++i) {
614 if (isspace(buf[i])) buf[i]='_';
615 buf[i] = tolower(buf[i]);
617 msg->cm_fields['F'] = strdoop(buf);
619 fseek(sc->digestfp, 0L, SEEK_END);
620 msglen = ftell(sc->digestfp);
622 msg->cm_fields['M'] = mallok(msglen + 1);
623 fseek(sc->digestfp, 0L, SEEK_SET);
624 fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
625 msg->cm_fields['M'][msglen] = 0;
627 fclose(sc->digestfp);
630 msgnum = CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
631 CtdlFreeMessage(msg);
633 /* Now generate the delivery instructions */
636 * Figure out how big a buffer we need to allocate
638 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
639 instr_len = instr_len + strlen(nptr->name);
645 lprintf(9, "Generating delivery instructions\n");
646 instr = mallok(instr_len);
648 lprintf(1, "Cannot allocate %ld bytes for instr...\n",
652 snprintf(instr, instr_len,
653 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
654 "bounceto|postmaster@%s\n" ,
655 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
657 /* Generate delivery instructions for each recipient */
658 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
659 size_t tmp = strlen(instr);
660 snprintf(&instr[tmp], instr_len - tmp,
661 "remote|%s|0||\n", nptr->name);
665 * Generate a message from the instructions
667 imsg = mallok(sizeof(struct CtdlMessage));
668 memset(imsg, 0, sizeof(struct CtdlMessage));
669 imsg->cm_magic = CTDLMESSAGE_MAGIC;
670 imsg->cm_anon_type = MES_NORMAL;
671 imsg->cm_format_type = FMT_RFC822;
672 imsg->cm_fields['A'] = strdoop("Citadel");
673 imsg->cm_fields['M'] = instr;
675 /* Save delivery instructions in spoolout room */
676 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
677 CtdlFreeMessage(imsg);
682 * Batch up and send all outbound traffic from the current room
684 void network_spoolout_room(char *room_to_spool) {
689 struct SpoolControl sc;
690 struct namelist *nptr;
693 int skipthisline = 0;
696 if (getroom(&CC->room, room_to_spool) != 0) {
697 lprintf(1, "ERROR: cannot load <%s>\n", room_to_spool);
701 memset(&sc, 0, sizeof(struct SpoolControl));
702 assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
704 begin_critical_section(S_NETCONFIGS);
705 end_critical_section(S_NETCONFIGS);
707 fp = fopen(filename, "r");
709 end_critical_section(S_NETCONFIGS);
713 lprintf(5, "Networking started for <%s>\n", CC->room.QRname);
715 while (fgets(buf, sizeof buf, fp) != NULL) {
716 buf[strlen(buf)-1] = 0;
718 extract(instr, buf, 0);
719 if (!strcasecmp(instr, "lastsent")) {
720 sc.lastsent = extract_long(buf, 1);
722 else if (!strcasecmp(instr, "listrecp")) {
723 nptr = (struct namelist *)
724 mallok(sizeof(struct namelist));
725 nptr->next = sc.listrecps;
726 extract(nptr->name, buf, 1);
729 else if (!strcasecmp(instr, "digestrecp")) {
730 nptr = (struct namelist *)
731 mallok(sizeof(struct namelist));
732 nptr->next = sc.digestrecps;
733 extract(nptr->name, buf, 1);
734 sc.digestrecps = nptr;
736 else if (!strcasecmp(instr, "ignet_push_share")) {
737 nptr = (struct namelist *)
738 mallok(sizeof(struct namelist));
739 nptr->next = sc.ignet_push_shares;
740 extract(nptr->name, buf, 1);
741 sc.ignet_push_shares = nptr;
744 /* Preserve 'other' lines ... *unless* they happen to
745 * be subscribe/unsubscribe pendings with expired
749 if (!strncasecmp(buf, "subpending|", 11)) {
750 if (time(NULL) - extract_long(buf, 4) > EXP) {
754 if (!strncasecmp(buf, "unsubpending|", 13)) {
755 if (time(NULL) - extract_long(buf, 3) > EXP) {
760 if (skipthisline == 0) {
761 linesize = strlen(buf);
762 sc.misc = realloc(sc.misc,
763 (miscsize + linesize + 2) );
764 sprintf(&sc.misc[miscsize], "%s\n", buf);
765 miscsize = miscsize + linesize + 1;
773 /* If there are digest recipients, we have to build a digest */
774 if (sc.digestrecps != NULL) {
775 sc.digestfp = tmpfile();
776 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
779 /* Do something useful */
780 CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL,
781 network_spool_msg, &sc);
783 /* If we wrote a digest, deliver it and then close it */
784 snprintf(buf, sizeof buf, "room_%s@%s",
785 CC->room.QRname, config.c_fqdn);
786 for (i=0; i<strlen(buf); ++i) {
787 buf[i] = tolower(buf[i]);
788 if (isspace(buf[i])) buf[i] = '_';
790 if (sc.digestfp != NULL) {
791 fprintf(sc.digestfp, " -----------------------------------"
792 "------------------------------------"
794 "You are subscribed to the '%s' "
796 "To post to the list: %s\n",
799 network_deliver_digest(&sc); /* deliver and close */
802 /* Now rewrite the config file */
803 fp = fopen(filename, "w");
805 lprintf(1, "ERROR: cannot open %s: %s\n",
806 filename, strerror(errno));
809 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
811 /* Write out the listrecps while freeing from memory at the
812 * same time. Am I clever or what? :)
814 while (sc.listrecps != NULL) {
815 fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
816 nptr = sc.listrecps->next;
820 /* Do the same for digestrecps */
821 while (sc.digestrecps != NULL) {
822 fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
823 nptr = sc.digestrecps->next;
824 phree(sc.digestrecps);
825 sc.digestrecps = nptr;
827 while (sc.ignet_push_shares != NULL) {
828 fprintf(fp, "ignet_push_share|%s\n",
829 sc.ignet_push_shares->name);
830 nptr = sc.ignet_push_shares->next;
831 phree(sc.ignet_push_shares);
832 sc.ignet_push_shares = nptr;
834 if (sc.misc != NULL) {
835 fwrite(sc.misc, strlen(sc.misc), 1, fp);
841 end_critical_section(S_NETCONFIGS);
846 * Batch up and send all outbound traffic from the current room
848 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
849 struct RoomProcList *ptr;
851 ptr = (struct RoomProcList *) mallok(sizeof (struct RoomProcList));
852 if (ptr == NULL) return;
854 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
861 * Learn topology from path fields
863 void network_learn_topology(char *node, char *path) {
865 struct NetMap *nmptr;
869 if (num_tokens(path, '!') < 3) return;
870 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
871 if (!strcasecmp(nmptr->nodename, node)) {
872 extract_token(nmptr->nexthop, path, 0, '!');
873 nmptr->lastcontact = time(NULL);
878 /* If we got here then it's not in the map, so add it. */
879 nmptr = (struct NetMap *) mallok(sizeof (struct NetMap));
880 strcpy(nmptr->nodename, node);
881 nmptr->lastcontact = time(NULL);
882 extract_token(nmptr->nexthop, path, 0, '!');
883 nmptr->next = the_netmap;
891 * Bounce a message back to the sender
893 void network_bounce(struct CtdlMessage *msg, char *reason) {
894 char *oldpath = NULL;
896 char bouncesource[SIZ];
898 struct recptypes *valid = NULL;
899 char force_room[ROOMNAMELEN];
900 static int serialnum = 0;
903 lprintf(9, "entering network_bounce()\n");
905 if (msg == NULL) return;
907 snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
910 * Give it a fresh message ID
912 if (msg->cm_fields['I'] != NULL) {
913 phree(msg->cm_fields['I']);
915 snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
916 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
917 msg->cm_fields['I'] = strdoop(buf);
920 * FIXME ... right now we're just sending a bounce; we really want to
921 * include the text of the bounced message.
923 if (msg->cm_fields['M'] != NULL) {
924 phree(msg->cm_fields['M']);
926 msg->cm_fields['M'] = strdoop(reason);
927 msg->cm_format_type = 0;
930 * Turn the message around
932 if (msg->cm_fields['R'] == NULL) {
933 phree(msg->cm_fields['R']);
936 if (msg->cm_fields['D'] == NULL) {
937 phree(msg->cm_fields['D']);
940 snprintf(recipient, sizeof recipient, "%s@%s",
941 msg->cm_fields['A'], msg->cm_fields['N']);
943 if (msg->cm_fields['A'] == NULL) {
944 phree(msg->cm_fields['A']);
947 if (msg->cm_fields['N'] == NULL) {
948 phree(msg->cm_fields['N']);
951 msg->cm_fields['A'] = strdoop(BOUNCESOURCE);
952 msg->cm_fields['N'] = strdoop(config.c_nodename);
955 /* prepend our node to the path */
956 if (msg->cm_fields['P'] != NULL) {
957 oldpath = msg->cm_fields['P'];
958 msg->cm_fields['P'] = NULL;
961 oldpath = strdoop("unknown_user");
963 size = strlen(oldpath) + SIZ;
964 msg->cm_fields['P'] = mallok(size);
965 snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
968 /* Now submit the message */
969 valid = validate_recipients(recipient);
970 if (valid != NULL) if (valid->num_error > 0) {
974 if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
975 strcpy(force_room, config.c_aideroom);
978 strcpy(force_room, "");
980 if ( (valid == NULL) && (strlen(force_room) == 0) ) {
981 strcpy(force_room, config.c_aideroom);
983 CtdlSubmitMsg(msg, valid, force_room);
986 if (valid != NULL) phree(valid);
987 CtdlFreeMessage(msg);
988 lprintf(9, "leaving network_bounce()\n");
995 * Process a buffer containing a single message from a single file
996 * from the inbound queue
998 void network_process_buffer(char *buffer, long size) {
999 struct CtdlMessage *msg;
1002 struct recptypes *recp = NULL;
1003 char target_room[ROOMNAMELEN];
1004 struct ser_ret sermsg;
1005 char *oldpath = NULL;
1011 /* Set default target room to trash */
1012 strcpy(target_room, TWITROOM);
1014 /* Load the message into memory */
1015 msg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
1016 memset(msg, 0, sizeof(struct CtdlMessage));
1017 msg->cm_magic = CTDLMESSAGE_MAGIC;
1018 msg->cm_anon_type = buffer[1];
1019 msg->cm_format_type = buffer[2];
1021 for (pos = 3; pos < size; ++pos) {
1022 field = buffer[pos];
1023 msg->cm_fields[field] = strdoop(&buffer[pos+1]);
1024 pos = pos + strlen(&buffer[(int)pos]);
1027 /* Check for message routing */
1028 if (msg->cm_fields['D'] != NULL) {
1029 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1031 /* route the message */
1032 strcpy(nexthop, "");
1033 if (is_valid_node(nexthop, NULL,
1034 msg->cm_fields['D']) == 0) {
1036 /* prepend our node to the path */
1037 if (msg->cm_fields['P'] != NULL) {
1038 oldpath = msg->cm_fields['P'];
1039 msg->cm_fields['P'] = NULL;
1042 oldpath = strdoop("unknown_user");
1044 size = strlen(oldpath) + SIZ;
1045 msg->cm_fields['P'] = mallok(size);
1046 snprintf(msg->cm_fields['P'], size, "%s!%s",
1047 config.c_nodename, oldpath);
1050 /* serialize the message */
1051 serialize_message(&sermsg, msg);
1054 if (strlen(nexthop) == 0) {
1055 strcpy(nexthop, msg->cm_fields['D']);
1057 snprintf(filename, sizeof filename,
1058 "./network/spoolout/%s", nexthop);
1059 fp = fopen(filename, "ab");
1066 CtdlFreeMessage(msg);
1070 else { /* invalid destination node name */
1073 "A message you sent could not be delivered due to an invalid destination node"
1074 " name. Please check the address and try sending the message again.\n");
1083 * Check to see if we already have a copy of this message
1085 if (network_usetable(msg) != 0) {
1086 snprintf(buf, sizeof buf,
1087 "Loopzapper rejected message <%s> "
1088 "from <%s> in <%s> @ <%s>\n",
1089 ((msg->cm_fields['I']!=NULL)?(msg->cm_fields['I']):""),
1090 ((msg->cm_fields['A']!=NULL)?(msg->cm_fields['A']):""),
1091 ((msg->cm_fields['O']!=NULL)?(msg->cm_fields['O']):""),
1092 ((msg->cm_fields['N']!=NULL)?(msg->cm_fields['N']):"")
1095 CtdlFreeMessage(msg);
1100 /* Learn network topology from the path */
1101 if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1102 network_learn_topology(msg->cm_fields['N'],
1103 msg->cm_fields['P']);
1106 /* Does it have a recipient? If so, validate it... */
1107 if (msg->cm_fields['R'] != NULL) {
1108 recp = validate_recipients(msg->cm_fields['R']);
1109 if (recp != NULL) if (recp->num_error > 0) {
1111 "A message you sent could not be delivered due to an invalid address.\n"
1112 "Please check the address and try sending the message again.\n");
1117 strcpy(target_room, ""); /* no target room if mail */
1120 else if (msg->cm_fields['C'] != NULL) {
1121 safestrncpy(target_room,
1122 msg->cm_fields['C'],
1123 sizeof target_room);
1126 else if (msg->cm_fields['O'] != NULL) {
1127 safestrncpy(target_room,
1128 msg->cm_fields['O'],
1129 sizeof target_room);
1132 /* Strip out fields that are only relevant during transit */
1133 if (msg->cm_fields['D'] != NULL) {
1134 phree(msg->cm_fields['D']);
1135 msg->cm_fields['D'] = NULL;
1137 if (msg->cm_fields['C'] != NULL) {
1138 phree(msg->cm_fields['C']);
1139 msg->cm_fields['C'] = NULL;
1142 /* save the message into a room */
1143 if (PerformNetprocHooks(msg, target_room) == 0) {
1144 msg->cm_flags = CM_SKIP_HOOKS;
1145 CtdlSubmitMsg(msg, recp, target_room);
1147 CtdlFreeMessage(msg);
1153 * Process a single message from a single file from the inbound queue
1155 void network_process_message(FILE *fp, long msgstart, long msgend) {
1160 hold_pos = ftell(fp);
1161 size = msgend - msgstart + 1;
1162 buffer = mallok(size);
1163 if (buffer != NULL) {
1164 fseek(fp, msgstart, SEEK_SET);
1165 fread(buffer, size, 1, fp);
1166 network_process_buffer(buffer, size);
1170 fseek(fp, hold_pos, SEEK_SET);
1175 * Process a single file from the inbound queue
1177 void network_process_file(char *filename) {
1179 long msgstart = (-1L);
1180 long msgend = (-1L);
1185 fp = fopen(filename, "rb");
1187 lprintf(5, "Error opening %s: %s\n",
1188 filename, strerror(errno));
1192 lprintf(5, "network: processing <%s>\n", filename);
1194 /* Look for messages in the data stream and break them out */
1195 while (ch = getc(fp), ch >= 0) {
1198 if (msgstart >= 0L) {
1199 msgend = msgcur - 1;
1200 network_process_message(fp, msgstart, msgend);
1208 msgend = msgcur - 1;
1209 if (msgstart >= 0L) {
1210 network_process_message(fp, msgstart, msgend);
1219 * Process anything in the inbound queue
1221 void network_do_spoolin(void) {
1226 dp = opendir("./network/spoolin");
1227 if (dp == NULL) return;
1229 while (d = readdir(dp), d != NULL) {
1230 snprintf(filename, sizeof filename,
1231 "./network/spoolin/%s", d->d_name);
1232 network_process_file(filename);
1244 * receive network spool from the remote system
1246 void receive_spool(int sock, char *remote_nodename) {
1248 long bytes_received;
1250 static char pbuf[IGNET_PACKET_SIZE];
1251 char tempfilename[PATH_MAX];
1255 strcpy(tempfilename, tmpnam(NULL));
1256 if (sock_puts(sock, "NDOP") < 0) return;
1257 if (sock_gets(sock, buf) < 0) return;
1258 lprintf(9, "<%s\n", buf);
1259 if (buf[0] != '2') {
1262 download_len = extract_long(&buf[4], 0);
1264 bytes_received = 0L;
1265 fp = fopen(tempfilename, "w");
1267 lprintf(9, "cannot open download file locally: %s\n",
1272 while (bytes_received < download_len) {
1273 snprintf(buf, sizeof buf, "READ %ld|%ld",
1275 ((download_len - bytes_received > IGNET_PACKET_SIZE)
1276 ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1277 if (sock_puts(sock, buf) < 0) {
1279 unlink(tempfilename);
1282 if (sock_gets(sock, buf) < 0) {
1284 unlink(tempfilename);
1287 if (buf[0] == '6') {
1288 plen = extract_long(&buf[4], 0);
1289 if (sock_read(sock, pbuf, plen) < 0) {
1291 unlink(tempfilename);
1294 fwrite((char *) pbuf, plen, 1, fp);
1295 bytes_received = bytes_received + plen;
1300 if (sock_puts(sock, "CLOS") < 0) {
1301 unlink(tempfilename);
1304 if (sock_gets(sock, buf) < 0) {
1305 unlink(tempfilename);
1308 lprintf(9, "%s\n", buf);
1309 snprintf(buf, sizeof buf, "mv %s ./network/spoolin/%s.%ld",
1310 tempfilename, remote_nodename, (long) getpid());
1317 * transmit network spool to the remote system
1319 void transmit_spool(int sock, char *remote_nodename)
1324 long bytes_to_write, thisblock;
1328 if (sock_puts(sock, "NUOP") < 0) return;
1329 if (sock_gets(sock, buf) < 0) return;
1330 lprintf(9, "<%s\n", buf);
1331 if (buf[0] != '2') {
1335 snprintf(sfname, sizeof sfname, "./network/spoolout/%s", remote_nodename);
1336 fd = open(sfname, O_RDONLY);
1338 if (errno == ENOENT) {
1339 lprintf(9, "Nothing to send.\n");
1341 lprintf(5, "cannot open upload file locally: %s\n",
1346 while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1347 bytes_to_write = plen;
1348 while (bytes_to_write > 0L) {
1349 snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1350 if (sock_puts(sock, buf) < 0) {
1354 if (sock_gets(sock, buf) < 0) {
1358 thisblock = atol(&buf[4]);
1359 if (buf[0] == '7') {
1360 if (sock_write(sock, pbuf,
1361 (int) thisblock) < 0) {
1365 bytes_to_write = bytes_to_write - thisblock;
1374 if (sock_puts(sock, "UCLS 1") < 0) return;
1375 if (sock_gets(sock, buf) < 0) return;
1376 lprintf(9, "<%s\n", buf);
1377 if (buf[0] == '2') {
1385 * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1387 void network_poll_node(char *node, char *secret, char *host, char *port) {
1391 if (network_talking_to(node, NTT_CHECK)) return;
1392 network_talking_to(node, NTT_ADD);
1393 lprintf(5, "Polling node <%s> at %s:%s\n", node, host, port);
1395 sock = sock_connect(host, port, "tcp");
1397 lprintf(7, "Could not connect: %s\n", strerror(errno));
1398 network_talking_to(node, NTT_REMOVE);
1402 lprintf(9, "Connected!\n");
1404 /* Read the server greeting */
1405 if (sock_gets(sock, buf) < 0) goto bail;
1406 lprintf(9, ">%s\n", buf);
1408 /* Identify ourselves */
1409 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1410 lprintf(9, "<%s\n", buf);
1411 if (sock_puts(sock, buf) <0) goto bail;
1412 if (sock_gets(sock, buf) < 0) goto bail;
1413 lprintf(9, ">%s\n", buf);
1414 if (buf[0] != '2') goto bail;
1416 /* At this point we are authenticated. */
1417 receive_spool(sock, node);
1418 transmit_spool(sock, node);
1420 sock_puts(sock, "QUIT");
1421 bail: sock_close(sock);
1422 network_talking_to(node, NTT_REMOVE);
1428 * Poll other Citadel nodes and transfer inbound/outbound network data.
1429 * Set "full" to nonzero to force a poll of every node, or to zero to poll
1430 * only nodes to which we have data to send.
1432 void network_poll_other_citadel_nodes(int full_poll) {
1433 char *ignetcfg = NULL;
1441 char spoolfile[SIZ];
1443 ignetcfg = CtdlGetSysConfig(IGNETCFG);
1444 if (ignetcfg == NULL) return; /* no nodes defined */
1446 /* Use the string tokenizer to grab one line at a time */
1447 for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
1448 extract_token(linebuf, ignetcfg, i, '\n');
1449 extract(node, linebuf, 0);
1450 extract(secret, linebuf, 1);
1451 extract(host, linebuf, 2);
1452 extract(port, linebuf, 3);
1453 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1454 && (strlen(host) > 0) && strlen(port) > 0) {
1457 sprintf(spoolfile, "./network/spoolout/%s",
1459 if (access(spoolfile, R_OK) == 0) {
1464 network_poll_node(node, secret, host, port);
1479 * network_do_queue()
1481 * Run through the rooms doing various types of network stuff.
1483 void network_do_queue(void) {
1484 static time_t last_run = 0L;
1485 struct RoomProcList *ptr;
1486 int full_processing = 1;
1489 * Run the full set of processing tasks no more frequently
1490 * than once every n seconds
1492 if ( (time(NULL) - last_run) < config.c_net_freq ) {
1493 full_processing = 0;
1497 * This is a simple concurrency check to make sure only one queue run
1498 * is done at a time. We could do this with a mutex, but since we
1499 * don't really require extremely fine granularity here, we'll do it
1500 * with a static variable instead.
1502 if (doing_queue) return;
1506 * Poll other Citadel nodes. Maybe. If "full_processing" is set
1507 * then we poll everyone. Otherwise we only poll nodes we have stuff
1510 network_poll_other_citadel_nodes(full_processing);
1513 * Load the network map and filter list into memory.
1516 filterlist = load_filter_list();
1519 * Go ahead and run the queue
1521 if (full_processing) {
1522 lprintf(7, "network: loading outbound queue\n");
1523 ForEachRoom(network_queue_room, NULL);
1525 lprintf(7, "network: running outbound queue\n");
1526 while (rplist != NULL) {
1527 network_spoolout_room(rplist->name);
1529 rplist = rplist->next;
1534 lprintf(7, "network: processing inbound queue\n");
1535 network_do_spoolin();
1537 /* Save the network map back to disk */
1538 write_network_map();
1540 /* Free the filter list in memory */
1541 free_filter_list(filterlist);
1544 lprintf(7, "network: queue run completed\n");
1546 if (full_processing) {
1547 last_run = time(NULL);
1555 * cmd_netp() - authenticate to the server as another Citadel node polling
1556 * for network traffic
1558 void cmd_netp(char *cmdbuf)
1567 cprintf("%d spooling - try again in a few minutes\n", ERROR);
1571 extract(node, cmdbuf, 0);
1572 extract(pass, cmdbuf, 1);
1574 if (is_valid_node(nexthop, secret, node) != 0) {
1575 cprintf("%d authentication failed\n", ERROR);
1579 if (strcasecmp(pass, secret)) {
1580 cprintf("%d authentication failed\n", ERROR);
1584 if (network_talking_to(node, NTT_CHECK)) {
1585 cprintf("%d Already talking to %s right now\n", ERROR, node);
1589 safestrncpy(CC->net_node, node, sizeof CC->net_node);
1590 network_talking_to(node, NTT_ADD);
1591 cprintf("%d authenticated as network node '%s'\n", CIT_OK,
1600 * Module entry point
1602 char *serv_network_init(void)
1604 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1605 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1606 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1607 CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);