-/* 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)->active_cfg->idp_realms,
- 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)->active_cfg->default_servers,
- 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)
-{
- TR_RP_CLIENT *rp;
- TR_INSTANCE *tr = (TR_INSTANCE *) tr_in;
-
- 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->active_cfg->rp_clients, 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);
-
- return 0;
-}
-
-
-
-/***** 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;
- }
-
- /* 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;
- }
-
- /* 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; /* how often should we check for updates? */
- struct timeval settling_time; /* how long should we wait for changes to settle before updating? */
- char *config_dir; /* what directory are we watching? */
- struct tr_fstat *fstat_list; /* file names and mtimes */
- int n_files; /* number of files in fstat_list */
- int change_detected; /* have we detected a change? */
- struct timeval last_change_detected; /* when did we last note a changed mtime? */
- TALLOC_CTX *ctx; /* what context should own configuration talloc blocks? */
- TR_INSTANCE *tr; /* what trust router are we updating? */
-};
-typedef struct tr_cfgwatch_data TR_CFGWATCH;
-
-/* Initialize a new tr_cfgwatch_data struct. Free this with talloc. */
-static TR_CFGWATCH *tr_cfgwatch_create(TALLOC_CTX *mem_ctx)
-{
- TALLOC_CTX *tmp_ctx=talloc_new(NULL);
- TR_CFGWATCH *new_cfg;
-
- new_cfg=talloc(tmp_ctx, TR_CFGWATCH);
- if (new_cfg == NULL) {
- tr_debug("tr_cfgwatch_create: Allocation failed.");
- } else {
- timerclear(&new_cfg->poll_interval);
- timerclear(&new_cfg->settling_time);
- new_cfg->config_dir=NULL;
- new_cfg->fstat_list=NULL;
- new_cfg->n_files=0;
- new_cfg->change_detected=0;
- timerclear(&new_cfg->last_change_detected);
- new_cfg->ctx=NULL;
- new_cfg->tr=NULL;
- }
-
- talloc_steal(mem_ctx, new_cfg);
- talloc_free(tmp_ctx);
- return new_cfg;
-}
-
-/* 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 */
-}