#include <pwd.h>
#include <errno.h>
#include <sys/types.h>
-
+#include <dirent.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
struct RoomProcList *rplist = NULL;
+/*
+ * We build a map of the Citadel network during network runs.
+ */
+struct NetMap {
+ struct NetMap *next;
+ char nodename[SIZ];
+ time_t lastcontact;
+ char nexthop[SIZ];
+};
+
+struct NetMap *the_netmap = NULL;
+
+
+
+/*
+ * Read the network map from its configuration file into memory.
+ */
+void read_network_map(void) {
+ char *serialized_map = NULL;
+ int i;
+ char buf[SIZ];
+ struct NetMap *nmptr;
+
+ serialized_map = CtdlGetSysConfig(IGNETMAP);
+ if (serialized_map == NULL) return; /* if null, no entries */
+
+ /* Use the string tokenizer to grab one line at a time */
+ for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
+ extract_token(buf, serialized_map, i, '\n');
+ nmptr = (struct NetMap *) mallok(sizeof(struct NetMap));
+ extract(nmptr->nodename, buf, 0);
+ nmptr->lastcontact = extract_long(buf, 1);
+ extract(nmptr->nexthop, buf, 2);
+ nmptr->next = the_netmap;
+ the_netmap = nmptr;
+ }
+
+ phree(serialized_map);
+}
+
+
+/*
+ * Write the network map from memory back to the configuration file.
+ */
+void write_network_map(void) {
+ char *serialized_map = NULL;
+ struct NetMap *nmptr;
+
+ serialized_map = strdoop("");
+
+ if (the_netmap != NULL) {
+ for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
+ serialized_map = reallok(serialized_map,
+ (strlen(serialized_map)+SIZ) );
+ if (strlen(nmptr->nodename) > 0) {
+ sprintf(&serialized_map[strlen(serialized_map)],
+ "%s|%ld|%s\n",
+ nmptr->nodename,
+ nmptr->lastcontact,
+ nmptr->nexthop);
+ }
+ }
+ }
+
+ CtdlPutSysConfig(IGNETMAP, serialized_map);
+ phree(serialized_map);
+
+ /* Now free the list */
+ while (the_netmap != NULL) {
+ nmptr = the_netmap->next;
+ phree(the_netmap);
+ the_netmap = nmptr;
+ }
+}
+
+
+
+/*
+ * Check the network map and determine whether the supplied node name is
+ * valid. If it is not a neighbor node, supply the name of a neighbor node
+ * which is the next hop.
+ */
+int is_valid_node(char *nexthop, char *node) {
+ char *ignetcfg = NULL;
+ int i;
+ char linebuf[SIZ];
+ char buf[SIZ];
+ int retval;
+ struct NetMap *nmptr;
+
+ if (node == NULL) {
+ return(-1);
+ }
+
+ /*
+ * First try the neighbor nodes
+ */
+ ignetcfg = CtdlGetSysConfig(IGNETCFG);
+ if (ignetcfg == NULL) {
+ if (nexthop != NULL) {
+ strcpy(nexthop, "");
+ }
+ return(-1);
+ }
+
+ retval = (-1);
+ if (nexthop != NULL) {
+ strcpy(nexthop, "");
+ }
+
+ /* Use the string tokenizer to grab one line at a time */
+ for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
+ extract_token(linebuf, ignetcfg, i, '\n');
+ extract(buf, linebuf, 0);
+ if (!strcasecmp(buf, node)) {
+ if (nexthop != NULL) {
+ strcpy(nexthop, "");
+ }
+ retval = 0;
+ }
+ }
+
+ phree(ignetcfg);
+ if (retval == 0) {
+ return(retval); /* yup, it's a direct neighbor */
+ }
+
+ /*
+ * If we get to this point we have to see if we know the next hop
+ */
+ if (the_netmap != NULL) {
+ for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
+ if (!strcasecmp(nmptr->nodename, node)) {
+ if (nexthop != NULL) {
+ strcpy(nexthop, nmptr->nexthop);
+ }
+ return(0);
+ }
+ }
+ }
+
+ /*
+ * If we get to this point, the supplied node name is bogus.
+ */
+ lprintf(5, "Invalid node name <%s>\n", node);
+ return(-1);
+}
+
+
+
void cmd_gnet(char *argbuf) {
send = 1;
- /* FIXME check for valid node name */
+ /* Check for valid node name */
+ if (is_valid_node(NULL, nptr->name) != 0) {
+ lprintf(3, "Invalid node <%s>\n",
+ nptr->name);
+ send = 0;
+ }
/* Check for split horizon */
bang = num_tokens(msg->cm_fields['P'], '!');
ptr->next = rplist;
rplist = ptr;
}
+
+
+/*
+ * Learn topology from path fields
+ */
+void network_learn_topology(char *node, char *path) {
+ char nexthop[SIZ];
+ struct NetMap *nmptr;
+
+ strcpy(nexthop, "");
+
+ if (num_tokens(path, '!') < 3) return;
+ for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
+ if (!strcasecmp(nmptr->nodename, node)) {
+ extract_token(nmptr->nexthop, path, 0, '!');
+ nmptr->lastcontact = time(NULL);
+ return;
+ }
+ }
+
+ /* If we got here then it's not in the map, so add it. */
+ nmptr = (struct NetMap *) mallok(sizeof (struct NetMap));
+ strcpy(nmptr->nodename, node);
+ nmptr->lastcontact = time(NULL);
+ extract_token(nmptr->nexthop, path, 0, '!');
+ nmptr->next = the_netmap;
+ the_netmap = nmptr;
+}
+
+
+
+/*
+ * Process a buffer containing a single message from a single file
+ * from the inbound queue
+ */
+void network_process_buffer(char *buffer, long size) {
+ struct CtdlMessage *msg;
+ long pos;
+ int field;
+ int a;
+ int e = MES_LOCAL;
+ struct usersupp tempUS;
+ char recp[SIZ];
+ char target_room[ROOMNAMELEN];
+
+ /* Set default target room to trash */
+ strcpy(target_room, TWITROOM);
+
+ /* Load the message into memory */
+ msg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
+ memset(msg, 0, sizeof(struct CtdlMessage));
+ msg->cm_magic = CTDLMESSAGE_MAGIC;
+ msg->cm_anon_type = buffer[1];
+ msg->cm_format_type = buffer[2];
+
+ for (pos = 3; pos < size; ++pos) {
+ field = buffer[pos];
+ msg->cm_fields[field] = strdoop(&buffer[pos+1]);
+ pos = pos + strlen(&buffer[(int)pos]);
+ }
+
+ /* Check for message routing */
+ if (msg->cm_fields['D'] != NULL) {
+ if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
+
+ /* FIXME route the message, stupid */
+
+ }
+ }
+
+ /* FIXME check to see if we already have this message */
+
+ /* Learn network topology from the path */
+ if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
+ network_learn_topology(msg->cm_fields['N'],
+ msg->cm_fields['P']);
+ }
+
+ /* Does it have a recipient? If so, validate it... */
+ if (msg->cm_fields['R'] != NULL) {
+
+ safestrncpy(recp, msg->cm_fields['R'], sizeof(recp));
+
+ e = alias(recp); /* alias and mail type */
+ if ((recp[0] == 0) || (e == MES_ERROR)) {
+
+ /* FIXME bounce the msg */
+
+ }
+ else if (e == MES_LOCAL) {
+ a = getuser(&tempUS, recp);
+ if (a != 0) {
+ /* FIXME bounce the msg */
+ }
+ else {
+ MailboxName(target_room, &tempUS, MAILROOM);
+ }
+ }
+ }
+
+ else if (msg->cm_fields['C'] != NULL) {
+ safestrncpy(target_room,
+ msg->cm_fields['C'],
+ sizeof target_room);
+ }
+
+ else if (msg->cm_fields['O'] != NULL) {
+ safestrncpy(target_room,
+ msg->cm_fields['O'],
+ sizeof target_room);
+ }
+
+ /* save the message into a room */
+ msg->cm_flags = CM_SKIP_HOOKS;
+ CtdlSaveMsg(msg, "", target_room, 0);
+ CtdlFreeMessage(msg);
+}
+
+
+/*
+ * Process a single message from a single file from the inbound queue
+ */
+void network_process_message(FILE *fp, long msgstart, long msgend) {
+ long hold_pos;
+ long size;
+ char *buffer;
+
+ hold_pos = ftell(fp);
+ size = msgend - msgstart + 1;
+ buffer = mallok(size);
+ if (buffer != NULL) {
+ fseek(fp, msgstart, SEEK_SET);
+ fread(buffer, size, 1, fp);
+ network_process_buffer(buffer, size);
+ phree(buffer);
+ }
+
+ fseek(fp, hold_pos, SEEK_SET);
+}
+
+
+/*
+ * Process a single file from the inbound queue
+ */
+void network_process_file(char *filename) {
+ FILE *fp;
+ long msgstart = (-1L);
+ long msgend = (-1L);
+ long msgcur = 0L;
+ int ch;
+
+ lprintf(7, "network: processing <%s>\n", filename);
+
+ fp = fopen(filename, "rb");
+ if (fp == NULL) {
+ lprintf(5, "Error opening %s: %s\n",
+ filename, strerror(errno));
+ return;
+ }
+
+ /* Look for messages in the data stream and break them out */
+ while (ch = getc(fp), ch >= 0) {
+ if (ch == 255) {
+ if (msgstart >= 0L) {
+ msgend = msgcur - 1;
+ network_process_message(fp, msgstart, msgend);
+ }
+ msgstart = msgcur;
+ }
+
+ ++msgcur;
+ }
+
+ msgend = msgcur - 1;
+ if (msgstart >= 0L) {
+ network_process_message(fp, msgstart, msgend);
+ }
+
+ fclose(fp);
+ unlink(filename);
+}
+
+
+/*
+ * Process anything in the inbound queue
+ */
+void network_do_spoolin(void) {
+ DIR *dp;
+ struct dirent *d;
+ char filename[SIZ];
+
+ dp = opendir("./network/spoolin");
+ if (dp == NULL) return;
+
+ while (d = readdir(dp), d != NULL) {
+ sprintf(filename, "./network/spoolin/%s", d->d_name);
+ network_process_file(filename);
+ }
+
+
+ closedir(dp);
+}
+
/*
* network_do_queue()
static time_t last_run = 0L;
struct RoomProcList *ptr;
-#define NETWORK_QUEUE_FREQUENCY 3600 /* one hour ... FIXME put in config */
/*
* Run no more frequently than once every n seconds
*/
doing_queue = 1;
last_run = time(NULL);
+ read_network_map();
+
/*
* Go ahead and run the queue
*/
phree(ptr);
}
+ lprintf(7, "network: processing inbound queue\n");
+ network_do_spoolin();
+
+ write_network_map();
+
lprintf(7, "network: queue run completed\n");
doing_queue = 0;
}
projects / citadel.git / blobdiff