X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=tr%2Ftr_main.c;h=c09d9dcddceb802eca9b2518f49e35555ace8368;hb=4ad7b3786ca62a58bc0ecd7240606d6989c0d0c3;hp=bc57024a7ce1471de1eff1030a869e6526ac07fc;hpb=f1e0cb3f969c55118d3254e9c5943751728e32ef;p=trust_router.git

diff --git a/tr/tr_main.c b/tr/tr_main.c
index bc57024..c09d9dc 100644
--- a/tr/tr_main.c
+++ b/tr/tr_main.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, JANET(UK)
+ * Copyright (c) 2012, 2015, JANET(UK)
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,41 +33,645 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <jansson.h>
+#include <argp.h>
+#include <event2/event.h>
+#include <talloc.h>
+#include <sys/stat.h>
 
-#include <trust_router.h>
+#include <tr.h>
+#include <tr_filter.h>
+#include <tid_internal.h>
+#include <tr_config.h>
+#include <tr_comm.h>
+#include <tr_idp.h>
+#include <tr_rp.h>
+#include <tr_debug.h>
 
-int main (int argc, const char *argv[])
+/* Structure to hold TR instance and original request in one cookie */
+typedef struct tr_resp_cookie {
+  TR_INSTANCE *tr;
+  TID_REQ *orig_req;
+} TR_RESP_COOKIE;
+
+
+static void tr_tidc_resp_handler (TIDC_INSTANCE *tidc, 
+			TID_REQ *req,
+			TID_RESP *resp, 
+			void *resp_cookie) 
+{
+  tr_debug("tr_tidc_resp_handler: Response received (conn = %d)! Realm = %s, Community = %s.", ((TR_RESP_COOKIE *)resp_cookie)->orig_req->conn, resp->realm->buf, resp->comm->buf);
+  req->resp_rcvd = 1;
+
+  /* TBD -- handle concatentation of multiple responses to single req */
+  tids_send_response(((TR_RESP_COOKIE *)resp_cookie)->tr->tids, 
+		     ((TR_RESP_COOKIE *)resp_cookie)->orig_req, 
+		     resp);
+  
+  return;
+}
+
+static int tr_tids_req_handler (TIDS_INSTANCE *tids,
+		      TID_REQ *orig_req, 
+		      TID_RESP *resp,
+		      void *tr_in)
+{
+  TIDC_INSTANCE *tidc = NULL;
+  TR_RESP_COOKIE resp_cookie;
+  TR_AAA_SERVER *aaa_servers = NULL;
+  TR_NAME *apc = NULL;
+  TID_REQ *fwd_req = NULL;
+  TR_COMM *cfg_comm = NULL;
+  TR_COMM *cfg_apc = NULL;
+  TR_INSTANCE *tr = (TR_INSTANCE *) tr_in;
+  int oaction = TR_FILTER_ACTION_REJECT;
+  int rc = 0;
+  time_t expiration_interval;
+
+  if ((!tids) || (!orig_req) || (!resp) ||  (!tr)) {
+    tr_debug("tr_tids_req_handler: Bad parameters");
+    return -1;
+  }
+
+  tr_debug("tr_tids_req_handler: Request received (conn = %d)! Realm = %s, Comm = %s", orig_req->conn, 
+	 orig_req->realm->buf, orig_req->comm->buf);
+  if (tids)
+    tids->req_count++;
+
+  /* Duplicate the request, so we can modify and forward it */
+  if (NULL == (fwd_req = tid_dup_req(orig_req))) {
+    tr_debug("tr_tids_req_handler: Unable to duplicate request.");
+    return -1;
+  }
+
+  if (NULL == (cfg_comm = tr_comm_lookup(tids->cookie, orig_req->comm))) {
+    tr_notice("tr_tids_req_hander: Request for unknown comm: %s.", orig_req->comm->buf);
+    tids_send_err_response(tids, orig_req, "Unknown community");
+    return -1;
+  }
+
+  /* Check that the rp_realm matches the filter for the GSS name that 
+   * was received. */
+
+  if ((!(tr)->rp_gss) || 
+      (!(tr)->rp_gss->filter)) {
+    tr_notice("tr_tids_req_handler: No GSS name for incoming request.");
+    tids_send_err_response(tids, orig_req, "No GSS name for request");
+    return -1;
+  }
+
+  if ((TR_FILTER_NO_MATCH == tr_filter_process_rp_permitted(orig_req->rp_realm, (tr)->rp_gss->filter, orig_req->cons, &fwd_req->cons, &oaction)) ||
+      (TR_FILTER_ACTION_REJECT == oaction)) {
+    tr_notice("tr_tids_req_handler: RP realm (%s) does not match RP Realm filter for GSS name", orig_req->rp_realm->buf);
+    tids_send_err_response(tids, orig_req, "RP Realm filter error");
+    return -1;
+  }
+  /* Check that the rp_realm is a member of the community in the request */
+  if (NULL == (tr_find_comm_rp(cfg_comm, orig_req->rp_realm))) {
+    tr_notice("tr_tids_req_handler: RP Realm (%s) not member of community (%s).", orig_req->rp_realm->buf, orig_req->comm->buf);
+    tids_send_err_response(tids, orig_req, "RP COI membership error");
+    return -1;
+  }
+
+  /* Map the comm in the request from a COI to an APC, if needed */
+  if (TR_COMM_COI == cfg_comm->type) {
+    tr_debug("tr_tids_req_handler: Community was a COI, switching.");
+    /* TBD -- In theory there can be more than one?  How would that work? */
+    if ((!cfg_comm->apcs) || (!cfg_comm->apcs->id)) {
+      tr_notice("No valid APC for COI %s.", orig_req->comm->buf);
+      tids_send_err_response(tids, orig_req, "No valid APC for community");
+      return -1;
+    }
+    apc = tr_dup_name(cfg_comm->apcs->id);
+
+    /* Check that the APC is configured */
+    if (NULL == (cfg_apc = tr_comm_lookup(tids->cookie, apc))) {
+      tr_notice("tr_tids_req_hander: Request for unknown comm: %s.", apc->buf);
+      tids_send_err_response(tids, orig_req, "Unknown APC");
+      return -1;
+    }
+
+    fwd_req->comm = apc;
+    fwd_req->orig_coi = orig_req->comm;
+
+    /* Check that rp_realm is a  member of this APC */
+    if (NULL == (tr_find_comm_rp(cfg_apc, orig_req->rp_realm))) {
+      tr_notice("tr_tids_req_hander: RP Realm (%s) not member of community (%s).", orig_req->rp_realm->buf, orig_req->comm->buf);
+      tids_send_err_response(tids, orig_req, "RP APC membership error");
+      return -1;
+    }
+  }
+
+  /* Find the AAA server(s) for this request */
+  if (NULL == (aaa_servers = tr_idp_aaa_server_lookup((TR_INSTANCE *)tids->cookie, 
+						      orig_req->realm, 
+						      orig_req->comm))) {
+      tr_debug("tr_tids_req_handler: No AAA Servers for realm %s, defaulting.", orig_req->realm->buf);
+      if (NULL == (aaa_servers = tr_default_server_lookup ((TR_INSTANCE *)tids->cookie,
+							   orig_req->comm))) {
+	tr_notice("tr_tids_req_handler: No default AAA servers, discarded.");
+        tids_send_err_response(tids, orig_req, "No path to AAA Server(s) for realm");
+        return -1;
+      }
+  } else {
+    /* if we aren't defaulting, check idp coi and apc membership */
+    if (NULL == (tr_find_comm_idp(cfg_comm, fwd_req->realm))) {
+      tr_notice("tr_tids_req_handler: IDP Realm (%s) not member of community (%s).", orig_req->realm->buf, orig_req->comm->buf);
+      tids_send_err_response(tids, orig_req, "IDP community membership error");
+      return -1;
+    }
+    if ( cfg_apc && (NULL == (tr_find_comm_idp(cfg_apc, fwd_req->realm)))) {
+      tr_notice("tr_tids_req_handler: IDP Realm (%s) not member of APC (%s).", orig_req->realm->buf, orig_req->comm->buf);
+      tids_send_err_response(tids, orig_req, "IDP APC membership error");
+      return -1;
+    }
+  }
+
+  /* send a TID request to the AAA server(s), and get the answer(s) */
+  /* TBD -- Handle multiple servers */
+
+  if (cfg_apc)
+    expiration_interval = cfg_apc->expiration_interval;
+  else expiration_interval = cfg_comm->expiration_interval;
+  if (fwd_req->expiration_interval)
+    fwd_req->expiration_interval =  (expiration_interval < fwd_req->expiration_interval) ? expiration_interval : fwd_req->expiration_interval;
+  else fwd_req->expiration_interval = expiration_interval;
+  /* Create a TID client instance */
+  if (NULL == (tidc = tidc_create())) {
+    tr_crit("tr_tids_req_hander: Unable to allocate TIDC instance.");
+    tids_send_err_response(tids, orig_req, "Memory allocation failure");
+    return -1;
+  }
+  /* Use the DH parameters from the original request */
+  /* TBD -- this needs to be fixed when we handle more than one req per conn */
+  tidc->client_dh = orig_req->tidc_dh;
+
+  /* Save information about this request for the response */
+  resp_cookie.tr = tr;
+  resp_cookie.orig_req = orig_req;
+
+  /* Set-up TID connection */
+  if (-1 == (fwd_req->conn = tidc_open_connection(tidc, 
+						  aaa_servers->hostname->buf,
+						  TID_PORT,
+					      &(fwd_req->gssctx)))) {
+    tr_notice("tr_tids_req_handler: Error in tidc_open_connection.");
+    tids_send_err_response(tids, orig_req, "Can't open connection to next hop TIDS");
+    return -1;
+  };
+
+  /* Send a TID request */
+  if (0 > (rc = tidc_fwd_request(tidc, fwd_req, &tr_tidc_resp_handler, (void *)&resp_cookie))) {
+    tr_notice("Error from tidc_fwd_request, rc = %d.", rc);
+    tids_send_err_response(tids, orig_req, "Can't forward request to next hop TIDS");
+    tid_req_free(orig_req);
+    return -1;
+  }
+    
+  tid_req_free(orig_req);
+  return 0;
+}
+
+static int tr_tids_gss_handler(gss_name_t client_name, TR_NAME *gss_name,
+			void *tr_in)
 {
-  TPQS_INSTANCE *tpqs = 0;
-  int err;
-  FILE *cfg_file = 0;
+  TR_RP_CLIENT *rp;
+  TR_INSTANCE *tr = (TR_INSTANCE *) tr_in;
 
-  /* parse command-line arguments -- TBD */
+  if ((!client_name) || (!gss_name) || (!tr)) {
+    tr_debug("tr_tidc_gss_handler: Bad parameters.");
+    return -1;
+  }
+  
+  /* look up the RP client matching the GSS name */
+  if ((NULL == (rp = tr_rp_client_lookup(tr, gss_name)))) {
+    tr_debug("tr_tids_gss_handler: Unknown GSS name %s", gss_name->buf);
+    return -1;
+  }
+
+  /* Store the rp client in the TR_INSTANCE structure for now... 
+   * TBD -- fix me for new tasking model. */
+  (tr)->rp_gss = rp;
+  tr_debug("Client's GSS Name: %s", gss_name->buf);
 
-  /* open the configuration file*/
-  cfg_file = fopen ("tr.cfg", "r");
+  return 0;
+}
 
-  /* read initial configuration */
-  if (0 != (err = tr_read_config (cfg_file))) {
-    printf ("Error reading configuration, err = %d.\n", err);
+/***** event loop management ****/
+
+/* struct for hanging on to a socket listener event */
+struct tr_socket_event {
+  int sock_fd; /* the fd for the socket */
+  struct event *ev; /* its event */
+};
+
+/* Allocate and set up the event base, return a pointer
+ * to the new event_base or NULL on failure.
+ * Does not currently enable thread-safe mode. */
+static struct event_base *tr_event_loop_init(void)
+{
+  struct event_base *base=NULL;
+
+  base=event_base_new();
+  if (base==NULL) {
+    tr_crit("Error initializing event loop.");
+    return NULL;
+  }
+  return base;
+}
+
+/* run the loop, does not normally return */
+static int tr_event_loop_run(struct event_base *base)
+{
+  return event_base_dispatch(base);
+}
+
+/* called when a connection to the TIDS port is received */
+static void tr_tids_event_cb(int listener, short event, void *arg)
+{
+  TIDS_INSTANCE *tids = (TIDS_INSTANCE *)arg;
+
+  if (0==(event & EV_READ))
+    tr_debug("tr_tids_event_cb: unexpected event on TIDS socket (event=0x%X)", event);
+  else 
+    tids_accept(tids, listener);
+}
+
+/* Configure the tids instance and set up its event handler.
+ * Returns 0 on success, nonzero on failure. Fills in
+ * *tids_event (which should be allocated). */
+static int tr_tids_event_init(struct event_base *base,
+                              TR_INSTANCE *tr,
+                              struct tr_socket_event *tids_ev)
+{
+  if (tids_ev == NULL) {
+    tr_debug("tr_tids_event_init: Null tids_ev.");
     return 1;
   }
 
-  /* initialize the trust path query server instance */
-  if (0 == (tpqs = tpqs_create ())) {
-    printf ("Error initializing Trust Path Query Server instance.\n", err);
+  /* get a tids listener */
+  tids_ev->sock_fd=tids_get_listener(tr->tids,
+                                      tr_tids_req_handler,
+                                      tr_tids_gss_handler,
+                                      tr->active_cfg->internal->hostname,
+                                      tr->active_cfg->internal->tids_port,
+                                      (void *)tr);
+  if (tids_ev->sock_fd < 0) {
+    tr_crit("Error opening TID server socket.");
     return 1;
   }
 
-  /* start the trust path query server, runs in its own thread */
-  if (0 != (err = tpqs_start(tpqs))) {
-    printf ("Error starting Trust Path Query Server, err = %d.\n", err);
-    return err;
+  /* and its event */
+  tids_ev->ev=event_new(base,
+                        tids_ev->sock_fd,
+                        EV_READ|EV_PERSIST,
+                        tr_tids_event_cb,
+                        (void *)tr->tids);
+  event_add(tids_ev->ev, NULL);
+
+  return 0;
+}
+
+
+/***** config file watching *****/
+
+struct tr_fstat {
+  char *name;
+  struct timespec mtime;
+};
+
+struct tr_cfgwatch_data {
+  struct timeval poll_interval;
+  char *config_dir;
+  struct tr_fstat *fstat_list;
+  int n_files;
+};
+
+/* Obtain the file modification time as seconds since epoch. Returns 0 on success. */
+static int tr_get_mtime(const char *path, struct timespec *ts)
+{
+  struct stat file_status;
+
+  if (stat(path, &file_status) != 0) {
+    return -1;
+  } else {
+    (*ts)=file_status.st_mtim;
+  }
+  return 0;
+}
+
+static char *tr_join_paths(TALLOC_CTX *mem_ctx, const char *p1, const char *p2)
+{
+  return talloc_asprintf(mem_ctx, "%s/%s", p1, p2); /* returns NULL on a failure */
+}
+
+static int tr_fstat_namecmp(const void *p1_arg, const void *p2_arg)
+{
+  struct tr_fstat *p1=(struct tr_fstat *) p1_arg;
+  struct tr_fstat *p2=(struct tr_fstat *) p2_arg;
+
+  return strcmp(p1->name, p2->name);
+}
+
+static int tr_fstat_mtimecmp(const void *p1_arg, const void *p2_arg)
+{
+  struct tr_fstat *p1=(struct tr_fstat *) p1_arg;
+  struct tr_fstat *p2=(struct tr_fstat *) p2_arg;
+
+  if (p1->mtime.tv_sec == p2->mtime.tv_sec)
+    return (p1->mtime.tv_nsec) - (p2->mtime.tv_nsec);
+  else
+    return (p1->mtime.tv_sec) - (p2->mtime.tv_sec);
+}
+
+/* Get status of all files in cfg_files. Returns list, or NULL on error.
+ * Files are sorted by filename. 
+ * After success, caller must eventually free result with talloc_free. */
+static struct tr_fstat *tr_fstat_get_all(TALLOC_CTX *mem_ctx,
+                                         const char *config_path,
+                                         struct dirent **cfg_files,
+                                         int n_files)
+{
+  TALLOC_CTX *tmp_ctx=talloc_new(NULL);
+  struct tr_fstat *fstat_list=NULL;
+  int ii=0;
+
+  /* create a new fstat list (may be discarded) */
+  fstat_list=talloc_array(tmp_ctx, struct tr_fstat, n_files);
+  if (fstat_list==NULL) {
+    tr_err("tr_fstat_get_all: Could not allocate fstat list.");
+    goto cleanup;
+  }
+
+  for (ii=0; ii<n_files; ii++) {
+    fstat_list[ii].name=talloc_strdup(fstat_list, cfg_files[ii]->d_name);
+    if (0 != tr_get_mtime(tr_join_paths(tmp_ctx, config_path, fstat_list[ii].name),
+                         &(fstat_list[ii].mtime))) {
+      tr_warning("tr_fstat_get_all: Could not obtain mtime for file %s", fstat_list[ii].name);
+    }
+  }
+
+  /* sort the list */
+  qsort(fstat_list, n_files, sizeof(struct tr_fstat), tr_fstat_namecmp);
+
+  /* put list in the caller's context and return it */
+  talloc_steal(mem_ctx, fstat_list);
+ cleanup:
+  talloc_free(tmp_ctx);
+  return fstat_list;
+}
+
+/* Checks whether any config files have appeared/disappeared/modified.
+ * Returns 1 if so, 0 otherwise. */
+static int tr_cfgwatch_update_needed(struct tr_cfgwatch_data *cfg_status)
+{
+  TALLOC_CTX *tmp_ctx=talloc_new(NULL);
+  struct tr_fstat *fstat_list=NULL;
+  int n_files=0;
+  int ii=0;
+  struct dirent **cfg_files=NULL;
+  int update_needed=0; /* return value */
+
+  /* get the list, must free cfg_files later with tr_free_cfg_file_list */
+  n_files = tr_find_config_files(cfg_status->config_dir, &cfg_files);
+  if (n_files <= 0) {
+    tr_warning("tr_cfgwatch_update: configuration files disappeared, skipping update.");
+    goto cleanup;
+  }
+
+  /* create a new fstat list (will be discarded) */
+  fstat_list=tr_fstat_get_all(tmp_ctx, cfg_status->config_dir, cfg_files, n_files);
+  if (fstat_list==NULL) {
+    tr_err("tr_cfgwatch_update: Error getting fstat list.");
+    goto cleanup;
+  }
+
+  /* see if the number of files change, if so need to update */
+  if (n_files != cfg_status->n_files) {
+    tr_debug("tr_cfgwatch_update: Changed number of config files (was %d, now %d).",
+             cfg_status->n_files,
+             n_files);
+    update_needed=1;
+    goto cleanup;
+  }
+
+  /* See if any files have a changed mtime. Both are sorted by name so this is easy. */
+  for (ii=0; ii<n_files; ii++) {
+    if ((0 != tr_fstat_mtimecmp(&fstat_list[ii], &cfg_status->fstat_list[ii]))
+       || (0 != tr_fstat_namecmp(&fstat_list[ii], &cfg_status->fstat_list[ii]))){
+      update_needed=1;
+      goto cleanup;
+    }
+  }
+
+ cleanup:
+  tr_free_config_file_list(n_files, &cfg_files);
+  talloc_free(tmp_ctx);
+  return update_needed;
+}
+
+static void tr_cfgwatch_event_cb(int listener, short event, void *arg)
+{
+  TALLOC_CTX *tmp_ctx=talloc_new(NULL);
+  struct tr_cfgwatch_data *cfg_status=(struct tr_cfgwatch_data *) arg;
+
+  if (tr_cfgwatch_update_needed(cfg_status)) {
+    tr_notice("tr_cfgwatch_event_cb: update needed!"); /* remove */
+  }
+  
+  talloc_free(tmp_ctx);
+}
+
+
+/* Configure the cfgwatch instance and set up its event handler.
+ * Returns 0 on success, nonzero on failure. Points
+ * *cfgwatch_ev to the event struct. */
+static int tr_cfgwatch_event_init(struct event_base *base,
+                                  struct tr_cfgwatch_data *cfg_status,
+                                  struct event **cfgwatch_ev)
+{
+  if (cfgwatch_ev == NULL) {
+    tr_debug("tr_cfgwatch_event_init: Null cfgwatch_ev.");
+    return 1;
   }
 
-  /* start the trust router protocol engine -- TBD */
-  while (1);
+  *cfgwatch_ev=event_new(base, -1, EV_TIMEOUT|EV_PERSIST, tr_cfgwatch_event_cb, (void *)cfg_status);
+  event_add(*cfgwatch_ev, &(cfg_status->poll_interval));
 
-  tpqs_destroy(tpqs);
+  tr_info("tr_cfgwatch_event_init: Added configuration file watcher with %0d.%06d second poll interval.",
+           cfg_status->poll_interval.tv_sec,
+           cfg_status->poll_interval.tv_usec);
   return 0;
 }
+
+
+/***** command-line option handling / setup *****/
+
+/* Strip trailing / from a path name.*/
+static void remove_trailing_slash(char *s) {
+  size_t n;
+
+  n=strlen(s);
+  if(s[n-1]=='/') {
+    s[n-1]='\0';
+  }
+}
+
+/* argp global parameters */
+const char *argp_program_bug_address=PACKAGE_BUGREPORT; /* bug reporting address */
+
+/* doc strings */
+static const char doc[]=PACKAGE_NAME " - Moonshot Trust Router";
+static const char arg_doc[]=""; /* string describing arguments, if any */
+
+/* define the options here. Fields are:
+ * { long-name, short-name, variable name, options, help description } */
+static const struct argp_option cmdline_options[] = {
+    { "config-dir", 'c', "DIR", 0, "Specify configuration file location (default is current directory)"},
+    { NULL }
+};
+
+/* structure for communicating with option parser */
+struct cmdline_args {
+  char *config_dir;
+};
+
+/* parser for individual options - fills in a struct cmdline_args */
+static error_t parse_option(int key, char *arg, struct argp_state *state)
+{
+  /* get a shorthand to the command line argument structure, part of state */
+  struct cmdline_args *arguments=state->input;
+
+  switch (key) {
+  case 'c':
+    if (arg == NULL) {
+      /* somehow we got called without an argument */
+      return ARGP_ERR_UNKNOWN;
+    }
+    arguments->config_dir=arg;
+    break;
+
+  default:
+    return ARGP_ERR_UNKNOWN;
+  }
+
+  return 0; /* success */
+}
+
+/* assemble the argp parser */
+static struct argp argp = {cmdline_options, parse_option, arg_doc, doc};
+
+
+int main (int argc, char *argv[])
+
+{
+  TALLOC_CTX *main_ctx=talloc_new(NULL);
+
+  TR_INSTANCE *tr = NULL;
+  struct dirent **cfg_files = NULL;
+  int n_files = 0;
+  TR_CFG_RC rc = TR_CFG_SUCCESS;	/* presume success */
+  struct cmdline_args opts;
+  struct event_base *ev_base;
+  struct tr_socket_event tids_ev;
+  struct event *cfgwatch_ev;
+  struct tr_cfgwatch_data cfgwatch;
+
+  /***** parse command-line arguments *****/
+  /* set defaults */
+  opts.config_dir=".";
+
+  /* parse the command line*/
+  argp_parse(&argp, argc, argv, 0, 0, &opts);
+
+  /* process options */
+  remove_trailing_slash(opts.config_dir);
+
+
+  /* Use standalone logging */
+  tr_log_open();
+
+  /***** create a Trust Router instance *****/
+  if (NULL == (tr = tr_create())) {
+    tr_crit("Unable to create Trust Router instance, exiting.");
+    return 1;
+  }
+
+
+  /***** process configuration *****/
+
+  /* find the configuration files -- n.b., tr_find_config_files()
+   * allocates memory to cfg_files which we must later free */
+  tr_debug("Reading configuration files from %s/", opts.config_dir);
+  n_files = tr_find_config_files(opts.config_dir, &cfg_files);
+  if (n_files <= 0) {
+    tr_crit("Can't locate configuration files, exiting.");
+    tr_free_config_file_list(n_files, &cfg_files);
+    exit(1);
+  }
+
+  if (TR_CFG_SUCCESS != tr_parse_config(tr, opts.config_dir, n_files, cfg_files)) {
+    tr_crit("Error decoding configuration information, exiting.");
+    tr_free_config_file_list(n_files, &cfg_files);
+    exit(1);
+  }
+
+  /* get the list of update times */
+  cfgwatch.config_dir=opts.config_dir;
+  cfgwatch.n_files=n_files;
+  cfgwatch.fstat_list=tr_fstat_get_all(main_ctx, opts.config_dir, cfg_files, n_files);
+  if (cfgwatch.fstat_list==NULL) {
+    tr_crit("Could not allocate config file status list.");
+    tr_free_config_file_list(n_files, &cfg_files);
+    exit(1);
+  }
+  
+  /* we are now done with the config filenames, free those */
+  tr_free_config_file_list(n_files, &cfg_files);
+
+  /* apply initial configuration */
+  if (TR_CFG_SUCCESS != (rc = tr_apply_new_config(tr))) {
+    tr_crit("Error applying configuration, rc = %d.", rc);
+    exit(1);
+  }
+
+
+  /***** initialize the trust path query server instance *****/
+  if (0 == (tr->tids = tids_create ())) {
+    tr_crit("Error initializing Trust Path Query Server instance.");
+    exit(1);
+  }
+
+  /***** Set up the event loop *****/
+  ev_base=tr_event_loop_init(); /* Set up the event loop */
+
+  /* install configuration file watching events */
+  cfgwatch.poll_interval.tv_sec=1; /* set poll interval */
+  cfgwatch.poll_interval.tv_usec=0;
+  /* already set config_dir, fstat_list and n_files earlier */
+  if (0 != tr_cfgwatch_event_init(ev_base, &cfgwatch, &cfgwatch_ev)) {
+    tr_crit("Error initializing configuration file watcher.");
+    exit(1);
+  }
+
+  /*tr_status_event_init();*/ /* install status reporting events */
+
+  /* install TID server events */
+  if (0 != tr_tids_event_init(ev_base, tr, &tids_ev)) {
+    tr_crit("Error initializing Trust Path Query Server instance.");
+    exit(1);
+  }
+
+  /*tr_trp_event_init();*/ /* install TRP handler events */
+
+  fflush(stdout); fflush(stderr);
+  tr_event_loop_run(ev_base); /* does not return until we are done */
+
+  /* TODO: update the cleanup code */
+  tids_destroy(tr->tids);
+  tr_destroy(tr);
+
+  talloc_free(main_ctx);
+  exit(0);
+}