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;
88 char *ignetcfg = NULL;
91 * Keep track of what messages to reject
93 struct FilterList *load_filter_list(void) {
94 char *serialized_list = NULL;
97 struct FilterList *newlist = NULL;
98 struct FilterList *nptr;
100 serialized_list = CtdlGetSysConfig(FILTERLIST);
101 if (serialized_list == NULL) return(NULL); /* if null, no entries */
103 /* Use the string tokenizer to grab one line at a time */
104 for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
105 extract_token(buf, serialized_list, i, '\n');
106 nptr = (struct FilterList *) malloc(sizeof(struct FilterList));
107 extract(nptr->fl_user, buf, 0);
108 striplt(nptr->fl_user);
109 extract(nptr->fl_room, buf, 1);
110 striplt(nptr->fl_room);
111 extract(nptr->fl_node, buf, 2);
112 striplt(nptr->fl_node);
114 /* Cowardly refuse to add an any/any/any entry that would
115 * end up filtering every single message.
117 if (strlen(nptr->fl_user) + strlen(nptr->fl_room)
118 + strlen(nptr->fl_node) == 0) {
122 nptr->next = newlist;
127 free(serialized_list);
132 void free_filter_list(struct FilterList *fl) {
133 if (fl == NULL) return;
134 free_filter_list(fl->next);
141 * Check the use table. This is a list of messages which have recently
142 * arrived on the system. It is maintained and queried to prevent the same
143 * message from being entered into the database multiple times if it happens
144 * to arrive multiple times by accident.
146 int network_usetable(struct CtdlMessage *msg) {
149 struct cdbdata *cdbut;
152 /* Bail out if we can't generate a message ID */
156 if (msg->cm_fields['I'] == NULL) {
159 if (strlen(msg->cm_fields['I']) == 0) {
163 /* Generate the message ID */
164 strcpy(msgid, msg->cm_fields['I']);
165 if (haschar(msgid, '@') == 0) {
167 if (msg->cm_fields['N'] != NULL) {
168 strcat(msgid, msg->cm_fields['N']);
175 cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
181 /* If we got to this point, it's unique: add it. */
182 strcpy(ut.ut_msgid, msgid);
183 ut.ut_timestamp = time(NULL);
184 cdb_store(CDB_USETABLE, msgid, strlen(msgid),
185 &ut, sizeof(struct UseTable) );
191 * Read the network map from its configuration file into memory.
193 void read_network_map(void) {
194 char *serialized_map = NULL;
197 struct NetMap *nmptr;
199 serialized_map = CtdlGetSysConfig(IGNETMAP);
200 if (serialized_map == NULL) return; /* if null, no entries */
202 /* Use the string tokenizer to grab one line at a time */
203 for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
204 extract_token(buf, serialized_map, i, '\n');
205 nmptr = (struct NetMap *) malloc(sizeof(struct NetMap));
206 extract(nmptr->nodename, buf, 0);
207 nmptr->lastcontact = extract_long(buf, 1);
208 extract(nmptr->nexthop, buf, 2);
209 nmptr->next = the_netmap;
213 free(serialized_map);
218 * Write the network map from memory back to the configuration file.
220 void write_network_map(void) {
221 char *serialized_map = NULL;
222 struct NetMap *nmptr;
224 serialized_map = strdup("");
226 if (the_netmap != NULL) {
227 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
228 serialized_map = realloc(serialized_map,
229 (strlen(serialized_map)+SIZ) );
230 if (strlen(nmptr->nodename) > 0) {
231 snprintf(&serialized_map[strlen(serialized_map)],
235 (long)nmptr->lastcontact,
241 CtdlPutSysConfig(IGNETMAP, serialized_map);
242 free(serialized_map);
244 /* Now free the list */
245 while (the_netmap != NULL) {
246 nmptr = the_netmap->next;
255 * Check the network map and determine whether the supplied node name is
256 * valid. If it is not a neighbor node, supply the name of a neighbor node
257 * which is the next hop. If it *is* a neighbor node, we also fill in the
260 int is_valid_node(char *nexthop, char *secret, char *node) {
265 struct NetMap *nmptr;
272 * First try the neighbor nodes
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);
302 return(retval); /* yup, it's a direct neighbor */
306 * If we get to this point we have to see if we know the next hop
308 if (the_netmap != NULL) {
309 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
310 if (!strcasecmp(nmptr->nodename, node)) {
311 if (nexthop != NULL) {
312 strcpy(nexthop, nmptr->nexthop);
320 * If we get to this point, the supplied node name is bogus.
322 lprintf(CTDL_ERR, "Invalid node name <%s>\n", node);
330 void cmd_gnet(char *argbuf) {
335 if (CtdlAccessCheck(ac_room_aide)) return;
336 assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
337 cprintf("%d Network settings for room #%ld <%s>\n",
339 CC->room.QRnumber, CC->room.QRname);
341 fp = fopen(filename, "r");
343 while (fgets(buf, sizeof buf, fp) != NULL) {
344 buf[strlen(buf)-1] = 0;
345 cprintf("%s\n", buf);
354 void cmd_snet(char *argbuf) {
355 char tempfilename[SIZ];
360 if (CtdlAccessCheck(ac_room_aide)) return;
361 safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
362 assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
364 fp = fopen(tempfilename, "w");
366 cprintf("%d Cannot open %s: %s\n",
367 ERROR + INTERNAL_ERROR,
372 cprintf("%d %s\n", SEND_LISTING, tempfilename);
373 while (client_gets(buf), strcmp(buf, "000")) {
374 fprintf(fp, "%s\n", buf);
378 /* Now copy the temp file to its permanent location
379 * (We use /bin/mv instead of link() because they may be on
380 * different filesystems)
383 snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
384 begin_critical_section(S_NETCONFIGS);
386 end_critical_section(S_NETCONFIGS);
391 * Spools out one message from the list.
393 void network_spool_msg(long msgnum, void *userdata) {
394 struct SpoolControl *sc;
397 char *newpath = NULL;
399 size_t instr_len = SIZ;
400 struct CtdlMessage *msg = NULL;
401 struct CtdlMessage *imsg;
402 struct namelist *nptr;
403 struct ser_ret sermsg;
409 int delete_after_send = 0; /* Set to 1 to delete after spooling */
411 sc = (struct SpoolControl *)userdata;
414 * Process mailing list recipients
416 if (sc->listrecps != NULL) {
418 /* First, copy it to the spoolout room */
419 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
420 if (err != 0) return;
423 * Figure out how big a buffer we need to allocate
425 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
426 instr_len = instr_len + strlen(nptr->name);
432 lprintf(CTDL_DEBUG, "Generating delivery instructions\n");
433 instr = malloc(instr_len);
435 lprintf(CTDL_EMERG, "Cannot allocate %ld bytes for instr...\n",
439 snprintf(instr, instr_len,
440 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
441 "bounceto|postmaster@%s\n" ,
442 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
444 /* Generate delivery instructions for each recipient */
445 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
446 size_t tmp = strlen(instr);
447 snprintf(&instr[tmp], instr_len - tmp,
448 "remote|%s|0||\n", nptr->name);
452 * Generate a message from the instructions
454 imsg = malloc(sizeof(struct CtdlMessage));
455 memset(imsg, 0, sizeof(struct CtdlMessage));
456 imsg->cm_magic = CTDLMESSAGE_MAGIC;
457 imsg->cm_anon_type = MES_NORMAL;
458 imsg->cm_format_type = FMT_RFC822;
459 imsg->cm_fields['A'] = strdup("Citadel");
460 imsg->cm_fields['M'] = instr;
462 /* Save delivery instructions in spoolout room */
463 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
464 CtdlFreeMessage(imsg);
468 * Process digest recipients
470 if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
471 fprintf(sc->digestfp, " -----------------------------------"
472 "------------------------------------"
474 CtdlRedirectOutput(sc->digestfp, -1);
475 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 0);
476 CtdlRedirectOutput(NULL, -1);
477 sc->num_msgs_spooled += 1;
481 * Process IGnet push shares
483 if (sc->ignet_push_shares != NULL) {
485 msg = CtdlFetchMessage(msgnum);
489 /* Prepend our node name to the Path field whenever
490 * sending a message to another IGnet node
492 if (msg->cm_fields['P'] == NULL) {
493 msg->cm_fields['P'] = strdup("username");
495 newpath_len = strlen(msg->cm_fields['P']) +
496 strlen(config.c_nodename) + 2;
497 newpath = malloc(newpath_len);
498 snprintf(newpath, newpath_len, "%s!%s",
499 config.c_nodename, msg->cm_fields['P']);
500 free(msg->cm_fields['P']);
501 msg->cm_fields['P'] = newpath;
504 * Force the message to appear in the correct room
505 * on the far end by setting the C field correctly
507 if (msg->cm_fields['C'] != NULL) {
508 free(msg->cm_fields['C']);
510 msg->cm_fields['C'] = strdup(CC->room.QRname);
513 * Determine if this message is set to be deleted
514 * after sending out on the network
516 if (msg->cm_fields['S'] != NULL) {
517 if (!strcasecmp(msg->cm_fields['S'],
519 delete_after_send = 1;
524 * Now serialize it for transmission
526 serialize_message(&sermsg, msg);
528 /* Now send it to every node */
529 for (nptr = sc->ignet_push_shares; nptr != NULL;
534 /* Check for valid node name */
535 if (is_valid_node(NULL,NULL,nptr->name) != 0) {
536 lprintf(CTDL_ERR, "Invalid node <%s>\n",
541 /* Check for split horizon */
542 lprintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
543 bang = num_tokens(msg->cm_fields['P'], '!');
544 if (bang > 1) for (i=0; i<(bang-1); ++i) {
545 extract_token(buf, msg->cm_fields['P'],
547 if (!strcasecmp(buf, nptr->name)) {
552 /* Send the message */
554 snprintf(filename, sizeof filename,
555 "./network/spoolout/%s",
557 fp = fopen(filename, "ab");
566 CtdlFreeMessage(msg);
570 /* update lastsent */
571 sc->lastsent = msgnum;
573 /* Delete this message if delete-after-send is set */
574 if (delete_after_send) {
575 CtdlDeleteMessages(CC->room.QRname, msgnum, "");
582 * Deliver digest messages
584 void network_deliver_digest(struct SpoolControl *sc) {
587 struct CtdlMessage *msg;
591 size_t instr_len = SIZ;
592 struct CtdlMessage *imsg;
593 struct namelist *nptr;
595 if (sc->num_msgs_spooled < 1) {
596 fclose(sc->digestfp);
601 msg = malloc(sizeof(struct CtdlMessage));
602 memset(msg, 0, sizeof(struct CtdlMessage));
603 msg->cm_magic = CTDLMESSAGE_MAGIC;
604 msg->cm_format_type = FMT_RFC822;
605 msg->cm_anon_type = MES_NORMAL;
607 sprintf(buf, "%ld", time(NULL));
608 msg->cm_fields['T'] = strdup(buf);
609 msg->cm_fields['A'] = strdup(CC->room.QRname);
610 msg->cm_fields['U'] = strdup(CC->room.QRname);
611 sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
612 for (i=0; i<strlen(buf); ++i) {
613 if (isspace(buf[i])) buf[i]='_';
614 buf[i] = tolower(buf[i]);
616 msg->cm_fields['F'] = strdup(buf);
618 fseek(sc->digestfp, 0L, SEEK_END);
619 msglen = ftell(sc->digestfp);
621 msg->cm_fields['M'] = malloc(msglen + 1);
622 fseek(sc->digestfp, 0L, SEEK_SET);
623 fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
624 msg->cm_fields['M'][msglen] = 0;
626 fclose(sc->digestfp);
629 msgnum = CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
630 CtdlFreeMessage(msg);
632 /* Now generate the delivery instructions */
635 * Figure out how big a buffer we need to allocate
637 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
638 instr_len = instr_len + strlen(nptr->name);
644 lprintf(CTDL_DEBUG, "Generating delivery instructions\n");
645 instr = malloc(instr_len);
647 lprintf(CTDL_EMERG, "Cannot allocate %ld bytes for instr...\n",
651 snprintf(instr, instr_len,
652 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
653 "bounceto|postmaster@%s\n" ,
654 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
656 /* Generate delivery instructions for each recipient */
657 for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
658 size_t tmp = strlen(instr);
659 snprintf(&instr[tmp], instr_len - tmp,
660 "remote|%s|0||\n", nptr->name);
664 * Generate a message from the instructions
666 imsg = malloc(sizeof(struct CtdlMessage));
667 memset(imsg, 0, sizeof(struct CtdlMessage));
668 imsg->cm_magic = CTDLMESSAGE_MAGIC;
669 imsg->cm_anon_type = MES_NORMAL;
670 imsg->cm_format_type = FMT_RFC822;
671 imsg->cm_fields['A'] = strdup("Citadel");
672 imsg->cm_fields['M'] = instr;
674 /* Save delivery instructions in spoolout room */
675 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
676 CtdlFreeMessage(imsg);
681 * Batch up and send all outbound traffic from the current room
683 void network_spoolout_room(char *room_to_spool) {
688 struct SpoolControl sc;
689 struct namelist *nptr = NULL;
692 int skipthisline = 0;
695 if (getroom(&CC->room, room_to_spool) != 0) {
696 lprintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
700 memset(&sc, 0, sizeof(struct SpoolControl));
701 assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
703 begin_critical_section(S_NETCONFIGS);
704 end_critical_section(S_NETCONFIGS);
706 fp = fopen(filename, "r");
708 end_critical_section(S_NETCONFIGS);
712 lprintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
714 while (fgets(buf, sizeof buf, fp) != NULL) {
715 buf[strlen(buf)-1] = 0;
717 extract(instr, buf, 0);
718 if (!strcasecmp(instr, "lastsent")) {
719 sc.lastsent = extract_long(buf, 1);
721 else if (!strcasecmp(instr, "listrecp")) {
722 nptr = (struct namelist *)
723 malloc(sizeof(struct namelist));
724 nptr->next = sc.listrecps;
725 extract(nptr->name, buf, 1);
728 else if (!strcasecmp(instr, "digestrecp")) {
729 nptr = (struct namelist *)
730 malloc(sizeof(struct namelist));
731 nptr->next = sc.digestrecps;
732 extract(nptr->name, buf, 1);
733 sc.digestrecps = nptr;
735 else if (!strcasecmp(instr, "ignet_push_share")) {
736 nptr = (struct namelist *)
737 malloc(sizeof(struct namelist));
738 nptr->next = sc.ignet_push_shares;
739 extract(nptr->name, buf, 1);
740 sc.ignet_push_shares = nptr;
743 /* Preserve 'other' lines ... *unless* they happen to
744 * be subscribe/unsubscribe pendings with expired
748 if (!strncasecmp(buf, "subpending|", 11)) {
749 if (time(NULL) - extract_long(buf, 4) > EXP) {
753 if (!strncasecmp(buf, "unsubpending|", 13)) {
754 if (time(NULL) - extract_long(buf, 3) > EXP) {
759 if (skipthisline == 0) {
760 linesize = strlen(buf);
761 sc.misc = realloc(sc.misc,
762 (miscsize + linesize + 2) );
763 sprintf(&sc.misc[miscsize], "%s\n", buf);
764 miscsize = miscsize + linesize + 1;
772 /* If there are digest recipients, we have to build a digest */
773 if (sc.digestrecps != NULL) {
774 sc.digestfp = tmpfile();
775 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
778 /* Do something useful */
779 CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL,
780 network_spool_msg, &sc);
782 /* If we wrote a digest, deliver it and then close it */
783 snprintf(buf, sizeof buf, "room_%s@%s",
784 CC->room.QRname, config.c_fqdn);
785 for (i=0; i<strlen(buf); ++i) {
786 buf[i] = tolower(buf[i]);
787 if (isspace(buf[i])) buf[i] = '_';
789 if (sc.digestfp != NULL) {
790 fprintf(sc.digestfp, " -----------------------------------"
791 "------------------------------------"
793 "You are subscribed to the '%s' "
795 "To post to the list: %s\n",
798 network_deliver_digest(&sc); /* deliver and close */
801 /* Now rewrite the config file */
802 fp = fopen(filename, "w");
804 lprintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
805 filename, strerror(errno));
808 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
810 /* Write out the listrecps while freeing from memory at the
811 * same time. Am I clever or what? :)
813 while (sc.listrecps != NULL) {
814 fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
815 nptr = sc.listrecps->next;
819 /* Do the same for digestrecps */
820 while (sc.digestrecps != NULL) {
821 fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
822 nptr = sc.digestrecps->next;
823 free(sc.digestrecps);
824 sc.digestrecps = nptr;
826 while (sc.ignet_push_shares != NULL) {
827 /* by checking each node's validity, we automatically
828 * purge nodes which do not exist from room network
829 * configurations at this time.
831 if (is_valid_node(NULL, NULL, nptr->name) == 0) {
832 fprintf(fp, "ignet_push_share|%s\n",
833 sc.ignet_push_shares->name);
835 nptr = sc.ignet_push_shares->next;
836 free(sc.ignet_push_shares);
837 sc.ignet_push_shares = nptr;
839 if (sc.misc != NULL) {
840 fwrite(sc.misc, strlen(sc.misc), 1, fp);
846 end_critical_section(S_NETCONFIGS);
852 * Send the *entire* contents of the current room to one specific network node,
853 * ignoring anything we know about which messages have already undergone
854 * network processing. This can be used to bring a new node into sync.
856 int network_sync_to(char *target_node) {
857 struct SpoolControl sc;
860 /* Concise syntax because we don't need a full linked-list */
861 memset(&sc, 0, sizeof(struct SpoolControl));
862 sc.ignet_push_shares = (struct namelist *)
863 malloc(sizeof(struct namelist));
864 sc.ignet_push_shares->next = NULL;
865 safestrncpy(sc.ignet_push_shares->name,
867 sizeof sc.ignet_push_shares->name);
869 /* Send ALL messages */
870 num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL,
871 network_spool_msg, &sc);
873 /* Concise cleanup because we know there's only one node in the sc */
874 free(sc.ignet_push_shares);
876 lprintf(CTDL_INFO, "Synchronized %d messages to <%s>\n",
877 num_spooled, target_node);
883 * Implements the NSYN command
885 void cmd_nsyn(char *argbuf) {
887 char target_node[SIZ];
889 if (CtdlAccessCheck(ac_aide)) return;
891 extract(target_node, argbuf, 0);
892 num_spooled = network_sync_to(target_node);
893 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
899 * Batch up and send all outbound traffic from the current room
901 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
902 struct RoomProcList *ptr;
904 ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
905 if (ptr == NULL) return;
907 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
914 * Learn topology from path fields
916 void network_learn_topology(char *node, char *path) {
918 struct NetMap *nmptr;
922 if (num_tokens(path, '!') < 3) return;
923 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
924 if (!strcasecmp(nmptr->nodename, node)) {
925 extract_token(nmptr->nexthop, path, 0, '!');
926 nmptr->lastcontact = time(NULL);
931 /* If we got here then it's not in the map, so add it. */
932 nmptr = (struct NetMap *) malloc(sizeof (struct NetMap));
933 strcpy(nmptr->nodename, node);
934 nmptr->lastcontact = time(NULL);
935 extract_token(nmptr->nexthop, path, 0, '!');
936 nmptr->next = the_netmap;
944 * Bounce a message back to the sender
946 void network_bounce(struct CtdlMessage *msg, char *reason) {
947 char *oldpath = NULL;
949 char bouncesource[SIZ];
951 struct recptypes *valid = NULL;
952 char force_room[ROOMNAMELEN];
953 static int serialnum = 0;
956 lprintf(CTDL_DEBUG, "entering network_bounce()\n");
958 if (msg == NULL) return;
960 snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
963 * Give it a fresh message ID
965 if (msg->cm_fields['I'] != NULL) {
966 free(msg->cm_fields['I']);
968 snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
969 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
970 msg->cm_fields['I'] = strdup(buf);
973 * FIXME ... right now we're just sending a bounce; we really want to
974 * include the text of the bounced message.
976 if (msg->cm_fields['M'] != NULL) {
977 free(msg->cm_fields['M']);
979 msg->cm_fields['M'] = strdup(reason);
980 msg->cm_format_type = 0;
983 * Turn the message around
985 if (msg->cm_fields['R'] == NULL) {
986 free(msg->cm_fields['R']);
989 if (msg->cm_fields['D'] == NULL) {
990 free(msg->cm_fields['D']);
993 snprintf(recipient, sizeof recipient, "%s@%s",
994 msg->cm_fields['A'], msg->cm_fields['N']);
996 if (msg->cm_fields['A'] == NULL) {
997 free(msg->cm_fields['A']);
1000 if (msg->cm_fields['N'] == NULL) {
1001 free(msg->cm_fields['N']);
1004 msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1005 msg->cm_fields['N'] = strdup(config.c_nodename);
1008 /* prepend our node to the path */
1009 if (msg->cm_fields['P'] != NULL) {
1010 oldpath = msg->cm_fields['P'];
1011 msg->cm_fields['P'] = NULL;
1014 oldpath = strdup("unknown_user");
1016 size = strlen(oldpath) + SIZ;
1017 msg->cm_fields['P'] = malloc(size);
1018 snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1021 /* Now submit the message */
1022 valid = validate_recipients(recipient);
1023 if (valid != NULL) if (valid->num_error > 0) {
1027 if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1028 strcpy(force_room, config.c_aideroom);
1031 strcpy(force_room, "");
1033 if ( (valid == NULL) && (strlen(force_room) == 0) ) {
1034 strcpy(force_room, config.c_aideroom);
1036 CtdlSubmitMsg(msg, valid, force_room);
1039 if (valid != NULL) free(valid);
1040 CtdlFreeMessage(msg);
1041 lprintf(CTDL_DEBUG, "leaving network_bounce()\n");
1048 * Process a buffer containing a single message from a single file
1049 * from the inbound queue
1051 void network_process_buffer(char *buffer, long size) {
1052 struct CtdlMessage *msg;
1055 struct recptypes *recp = NULL;
1056 char target_room[ROOMNAMELEN];
1057 struct ser_ret sermsg;
1058 char *oldpath = NULL;
1062 unsigned char firstbyte;
1063 unsigned char lastbyte;
1065 /* Validate just a little bit. First byte should be FF and
1066 * last byte should be 00.
1068 memcpy(&firstbyte, &buffer[0], 1);
1069 memcpy(&lastbyte, &buffer[size-1], 1);
1070 if ( (firstbyte != 255) || (lastbyte != 0) ) {
1071 lprintf(CTDL_ERR, "Corrupt message! Ignoring.\n");
1075 /* Set default target room to trash */
1076 strcpy(target_room, TWITROOM);
1078 /* Load the message into memory */
1079 msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1080 memset(msg, 0, sizeof(struct CtdlMessage));
1081 msg->cm_magic = CTDLMESSAGE_MAGIC;
1082 msg->cm_anon_type = buffer[1];
1083 msg->cm_format_type = buffer[2];
1085 for (pos = 3; pos < size; ++pos) {
1086 field = buffer[pos];
1087 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1088 pos = pos + strlen(&buffer[(int)pos]);
1091 /* Check for message routing */
1092 if (msg->cm_fields['D'] != NULL) {
1093 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1095 /* route the message */
1096 strcpy(nexthop, "");
1097 if (is_valid_node(nexthop, NULL,
1098 msg->cm_fields['D']) == 0) {
1100 /* prepend our node to the path */
1101 if (msg->cm_fields['P'] != NULL) {
1102 oldpath = msg->cm_fields['P'];
1103 msg->cm_fields['P'] = NULL;
1106 oldpath = strdup("unknown_user");
1108 size = strlen(oldpath) + SIZ;
1109 msg->cm_fields['P'] = malloc(size);
1110 snprintf(msg->cm_fields['P'], size, "%s!%s",
1111 config.c_nodename, oldpath);
1114 /* serialize the message */
1115 serialize_message(&sermsg, msg);
1118 if (strlen(nexthop) == 0) {
1119 strcpy(nexthop, msg->cm_fields['D']);
1121 snprintf(filename, sizeof filename,
1122 "./network/spoolout/%s", nexthop);
1123 fp = fopen(filename, "ab");
1130 CtdlFreeMessage(msg);
1134 else { /* invalid destination node name */
1137 "A message you sent could not be delivered due to an invalid destination node"
1138 " name. Please check the address and try sending the message again.\n");
1147 * Check to see if we already have a copy of this message, and
1148 * abort its processing if so. (We used to post a warning to Aide>
1149 * every time this happened, but the network is now so densely
1150 * connected that it's inevitable.)
1152 if (network_usetable(msg) != 0) {
1156 /* Learn network topology from the path */
1157 if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1158 network_learn_topology(msg->cm_fields['N'],
1159 msg->cm_fields['P']);
1162 /* Does it have a recipient? If so, validate it... */
1163 if (msg->cm_fields['R'] != NULL) {
1164 recp = validate_recipients(msg->cm_fields['R']);
1165 if (recp != NULL) if (recp->num_error > 0) {
1167 "A message you sent could not be delivered due to an invalid address.\n"
1168 "Please check the address and try sending the message again.\n");
1173 strcpy(target_room, ""); /* no target room if mail */
1176 else if (msg->cm_fields['C'] != NULL) {
1177 safestrncpy(target_room,
1178 msg->cm_fields['C'],
1179 sizeof target_room);
1182 else if (msg->cm_fields['O'] != NULL) {
1183 safestrncpy(target_room,
1184 msg->cm_fields['O'],
1185 sizeof target_room);
1188 /* Strip out fields that are only relevant during transit */
1189 if (msg->cm_fields['D'] != NULL) {
1190 free(msg->cm_fields['D']);
1191 msg->cm_fields['D'] = NULL;
1193 if (msg->cm_fields['C'] != NULL) {
1194 free(msg->cm_fields['C']);
1195 msg->cm_fields['C'] = NULL;
1198 /* save the message into a room */
1199 if (PerformNetprocHooks(msg, target_room) == 0) {
1200 msg->cm_flags = CM_SKIP_HOOKS;
1201 CtdlSubmitMsg(msg, recp, target_room);
1203 CtdlFreeMessage(msg);
1209 * Process a single message from a single file from the inbound queue
1211 void network_process_message(FILE *fp, long msgstart, long msgend) {
1216 hold_pos = ftell(fp);
1217 size = msgend - msgstart + 1;
1218 buffer = malloc(size);
1219 if (buffer != NULL) {
1220 fseek(fp, msgstart, SEEK_SET);
1221 fread(buffer, size, 1, fp);
1222 network_process_buffer(buffer, size);
1226 fseek(fp, hold_pos, SEEK_SET);
1231 * Process a single file from the inbound queue
1233 void network_process_file(char *filename) {
1235 long msgstart = (-1L);
1236 long msgend = (-1L);
1241 fp = fopen(filename, "rb");
1243 lprintf(CTDL_CRIT, "Error opening %s: %s\n",
1244 filename, strerror(errno));
1248 lprintf(CTDL_INFO, "network: processing <%s>\n", filename);
1250 /* Look for messages in the data stream and break them out */
1251 while (ch = getc(fp), ch >= 0) {
1254 if (msgstart >= 0L) {
1255 msgend = msgcur - 1;
1256 network_process_message(fp, msgstart, msgend);
1264 msgend = msgcur - 1;
1265 if (msgstart >= 0L) {
1266 network_process_message(fp, msgstart, msgend);
1275 * Process anything in the inbound queue
1277 void network_do_spoolin(void) {
1282 dp = opendir("./network/spoolin");
1283 if (dp == NULL) return;
1285 while (d = readdir(dp), d != NULL) {
1286 snprintf(filename, sizeof filename,
1287 "./network/spoolin/%s", d->d_name);
1288 network_process_file(filename);
1297 * Delete any files in the outbound queue that were intended
1298 * to be sent to nodes which no nlonger exist.
1300 void network_purge_spoolout(void) {
1307 dp = opendir("./network/spoolout");
1308 if (dp == NULL) return;
1310 while (d = readdir(dp), d != NULL) {
1311 snprintf(filename, sizeof filename,
1312 "./network/spoolout/%s", d->d_name);
1314 strcpy(nexthop, "");
1315 i = is_valid_node(nexthop, NULL, d->d_name);
1317 if ( (i != 0) || (strlen(nexthop) > 0) ) {
1329 * receive network spool from the remote system
1331 void receive_spool(int sock, char *remote_nodename) {
1333 long bytes_received;
1335 static char pbuf[IGNET_PACKET_SIZE];
1336 char tempfilename[PATH_MAX];
1340 strcpy(tempfilename, tmpnam(NULL));
1341 if (sock_puts(sock, "NDOP") < 0) return;
1342 if (sock_gets(sock, buf) < 0) return;
1343 lprintf(CTDL_DEBUG, "<%s\n", buf);
1344 if (buf[0] != '2') {
1347 download_len = extract_long(&buf[4], 0);
1349 bytes_received = 0L;
1350 fp = fopen(tempfilename, "w");
1352 lprintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1357 while (bytes_received < download_len) {
1358 snprintf(buf, sizeof buf, "READ %ld|%ld",
1360 ((download_len - bytes_received > IGNET_PACKET_SIZE)
1361 ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1362 if (sock_puts(sock, buf) < 0) {
1364 unlink(tempfilename);
1367 if (sock_gets(sock, buf) < 0) {
1369 unlink(tempfilename);
1372 if (buf[0] == '6') {
1373 plen = extract_long(&buf[4], 0);
1374 if (sock_read(sock, pbuf, plen) < 0) {
1376 unlink(tempfilename);
1379 fwrite((char *) pbuf, plen, 1, fp);
1380 bytes_received = bytes_received + plen;
1385 if (sock_puts(sock, "CLOS") < 0) {
1386 unlink(tempfilename);
1389 if (sock_gets(sock, buf) < 0) {
1390 unlink(tempfilename);
1393 lprintf(CTDL_DEBUG, "%s\n", buf);
1394 snprintf(buf, sizeof buf, "mv %s ./network/spoolin/%s.%ld",
1395 tempfilename, remote_nodename, (long) getpid());
1402 * transmit network spool to the remote system
1404 void transmit_spool(int sock, char *remote_nodename)
1409 long bytes_to_write, thisblock;
1413 if (sock_puts(sock, "NUOP") < 0) return;
1414 if (sock_gets(sock, buf) < 0) return;
1415 lprintf(CTDL_DEBUG, "<%s\n", buf);
1416 if (buf[0] != '2') {
1420 snprintf(sfname, sizeof sfname, "./network/spoolout/%s", remote_nodename);
1421 fd = open(sfname, O_RDONLY);
1423 if (errno == ENOENT) {
1424 lprintf(CTDL_INFO, "Nothing to send.\n");
1426 lprintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1431 while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1432 bytes_to_write = plen;
1433 while (bytes_to_write > 0L) {
1434 snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1435 if (sock_puts(sock, buf) < 0) {
1439 if (sock_gets(sock, buf) < 0) {
1443 thisblock = atol(&buf[4]);
1444 if (buf[0] == '7') {
1445 if (sock_write(sock, pbuf,
1446 (int) thisblock) < 0) {
1450 bytes_to_write = bytes_to_write - thisblock;
1459 if (sock_puts(sock, "UCLS 1") < 0) return;
1460 if (sock_gets(sock, buf) < 0) return;
1461 lprintf(CTDL_DEBUG, "<%s\n", buf);
1462 if (buf[0] == '2') {
1470 * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1472 void network_poll_node(char *node, char *secret, char *host, char *port) {
1476 if (network_talking_to(node, NTT_CHECK)) return;
1477 network_talking_to(node, NTT_ADD);
1478 lprintf(CTDL_INFO, "Polling node <%s> at %s:%s\n", node, host, port);
1480 sock = sock_connect(host, port, "tcp");
1482 lprintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
1483 network_talking_to(node, NTT_REMOVE);
1487 lprintf(CTDL_DEBUG, "Connected!\n");
1489 /* Read the server greeting */
1490 if (sock_gets(sock, buf) < 0) goto bail;
1491 lprintf(CTDL_DEBUG, ">%s\n", buf);
1493 /* Identify ourselves */
1494 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1495 lprintf(CTDL_DEBUG, "<%s\n", buf);
1496 if (sock_puts(sock, buf) <0) goto bail;
1497 if (sock_gets(sock, buf) < 0) goto bail;
1498 lprintf(CTDL_DEBUG, ">%s\n", buf);
1499 if (buf[0] != '2') goto bail;
1501 /* At this point we are authenticated. */
1502 receive_spool(sock, node);
1503 transmit_spool(sock, node);
1505 sock_puts(sock, "QUIT");
1506 bail: sock_close(sock);
1507 network_talking_to(node, NTT_REMOVE);
1513 * Poll other Citadel nodes and transfer inbound/outbound network data.
1514 * Set "full" to nonzero to force a poll of every node, or to zero to poll
1515 * only nodes to which we have data to send.
1517 void network_poll_other_citadel_nodes(int full_poll) {
1525 char spoolfile[SIZ];
1527 if (ignetcfg == NULL) return; /* no nodes defined */
1529 /* Use the string tokenizer to grab one line at a time */
1530 for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
1531 extract_token(linebuf, ignetcfg, i, '\n');
1532 extract(node, linebuf, 0);
1533 extract(secret, linebuf, 1);
1534 extract(host, linebuf, 2);
1535 extract(port, linebuf, 3);
1536 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1537 && (strlen(host) > 0) && strlen(port) > 0) {
1540 sprintf(spoolfile, "./network/spoolout/%s",
1542 if (access(spoolfile, R_OK) == 0) {
1547 network_poll_node(node, secret, host, port);
1561 * network_do_queue()
1563 * Run through the rooms doing various types of network stuff.
1565 void network_do_queue(void) {
1566 static time_t last_run = 0L;
1567 struct RoomProcList *ptr;
1568 int full_processing = 1;
1571 * Run the full set of processing tasks no more frequently
1572 * than once every n seconds
1574 if ( (time(NULL) - last_run) < config.c_net_freq ) {
1575 full_processing = 0;
1579 * This is a simple concurrency check to make sure only one queue run
1580 * is done at a time. We could do this with a mutex, but since we
1581 * don't really require extremely fine granularity here, we'll do it
1582 * with a static variable instead.
1584 if (doing_queue) return;
1587 /* Load the IGnet Configuration into memory */
1588 if (ignetcfg == NULL) {
1589 ignetcfg = CtdlGetSysConfig(IGNETCFG);
1593 * Poll other Citadel nodes. Maybe. If "full_processing" is set
1594 * then we poll everyone. Otherwise we only poll nodes we have stuff
1597 network_poll_other_citadel_nodes(full_processing);
1600 * Load the network map and filter list into memory.
1603 filterlist = load_filter_list();
1606 * Go ahead and run the queue
1608 if (full_processing) {
1609 lprintf(CTDL_INFO, "network: loading outbound queue\n");
1610 ForEachRoom(network_queue_room, NULL);
1612 lprintf(CTDL_INFO, "network: running outbound queue\n");
1613 while (rplist != NULL) {
1614 network_spoolout_room(rplist->name);
1616 rplist = rplist->next;
1621 lprintf(CTDL_INFO, "network: processing inbound queue\n");
1622 network_do_spoolin();
1624 /* Save the network map back to disk */
1625 write_network_map();
1627 /* Free the filter list in memory */
1628 free_filter_list(filterlist);
1631 network_purge_spoolout();
1633 lprintf(CTDL_INFO, "network: queue run completed\n");
1635 if (full_processing) {
1636 last_run = time(NULL);
1644 * cmd_netp() - authenticate to the server as another Citadel node polling
1645 * for network traffic
1647 void cmd_netp(char *cmdbuf)
1656 cprintf("%d spooling - try again in a few minutes\n", ERROR + RESOURCE_BUSY);
1660 extract(node, cmdbuf, 0);
1661 extract(pass, cmdbuf, 1);
1663 if (is_valid_node(nexthop, secret, node) != 0) {
1664 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
1668 if (strcasecmp(pass, secret)) {
1669 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
1673 if (network_talking_to(node, NTT_CHECK)) {
1674 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
1678 safestrncpy(CC->net_node, node, sizeof CC->net_node);
1679 network_talking_to(node, NTT_ADD);
1680 cprintf("%d authenticated as network node '%s'\n", CIT_OK,
1686 * This handler detects changes being made to the system's IGnet
1689 int netconfig_aftersave(struct CtdlMessage *msg) {
1693 /* If this isn't the configuration room, or if this isn't a MIME
1694 * message, don't bother.
1696 if (strcasecmp(msg->cm_fields['O'], SYSCONFIGROOM)) return(0);
1697 if (msg->cm_format_type != 4) return(0);
1699 ptr = msg->cm_fields['M'];
1700 while (ptr != NULL) {
1702 linelen = strcspn(ptr, "\n");
1703 if (linelen == 0) return(0); /* end of headers */
1705 if (!strncasecmp(ptr, "Content-type: ", 14)) {
1706 if (!strncasecmp(&ptr[14], IGNETCFG,
1707 strlen(IGNETCFG))) {
1708 if (ignetcfg != NULL) free(ignetcfg);
1713 ptr = strchr((char *)ptr, '\n');
1714 if (ptr != NULL) ++ptr;
1724 * Module entry point
1726 char *serv_network_init(void)
1728 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1729 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1730 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1731 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
1732 CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
1733 CtdlRegisterMessageHook(netconfig_aftersave, EVT_AFTERSAVE);