/*
- * 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
*/
#include <stdio.h>
+#include <stdlib.h>
+#include <jansson.h>
+#include <argp.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)
{
- TPQS_INSTANCE *tpqs = 0;
- int err;
- FILE *cfg_file = 0;
+ 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;
- /* parse command-line arguments -- TBD */
+ /* 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;
+}
- /* open the configuration file*/
- cfg_file = fopen ("tr.cfg", "r");
+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;
- /* read initial configuration */
- if (0 != (err = tr_read_config (cfg_file))) {
- printf ("Error reading configuration, err = %d.\n", err);
- return 1;
+ if ((!tids) || (!orig_req) || (!resp) || (!tr)) {
+ tr_debug("tr_tids_req_handler: Bad parameters");
+ return -1;
}
- /* initialize the trust path query server instance */
- if (0 == (tpqs = tpqs_init ())) {
- printf ("Error initializing Trust Path Query Server instance.\n", err);
- 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;
+ }
}
- /* 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;
+ /* 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;
- /* start the trust router protocol engine -- TBD */
- while (1);
+ /* 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, 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;
+}
+
+/* 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';
+ }
+}
+
+/* command-line option setup */
+
+/* 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[])
+{
+ TR_INSTANCE *tr = NULL;
+ struct dirent **cfg_files = NULL;
+ TR_CFG_RC rc = TR_CFG_SUCCESS; /* presume success */
+ int err = 0, n = 0;
+ struct cmdline_args opts;
+
+ /* Use standalone logging */
+ tr_log_open();
+
+ /* 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);
+
+ /* create a Trust Router instance */
+ if (NULL == (tr = tr_create())) {
+ tr_crit("Unable to create Trust Router instance, exiting.");
+ return 1;
+ }
+
+ /* 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 = tr_find_config_files(opts.config_dir, &cfg_files);
+ if (n <= 0) {
+ tr_crit("Can't locate configuration files, exiting.");
+ tr_free_config_file_list(n, &cfg_files);
+ exit(1);
+ }
+
+ if (TR_CFG_SUCCESS != tr_parse_config(tr, opts.config_dir, n, cfg_files)) {
+ tr_crit("Error decoding configuration information, exiting.");
+ tr_free_config_file_list(n, &cfg_files);
+ exit(1);
+ }
+
+ /* we are now done with the config filenames, free those */
+ tr_free_config_file_list(n, &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);
+ }
+
+ /* print the loaded configuration */
+ tr_print_config(tr->active_cfg);
+
+ /* initialize the trust path query server instance */
+ if (0 == (tr->tids = tids_create ())) {
+ tr_crit("Error initializing Trust Path Query Server instance.");
+ exit(1);
+ }
+
+ /* start the trust path query server, won't return unless fatal error. */
+ if (0 != (err = tids_start(tr->tids, &tr_tids_req_handler, &tr_tids_gss_handler, tr->active_cfg->internal->hostname, tr->active_cfg->internal->tids_port, (void *)tr))) {
+ tr_crit("Error from Trust Path Query Server, err = %d.", err);
+ exit(err);
+ }
+
+ tids_destroy(tr->tids);
+ tr_destroy(tr);
+ exit(0);
+}
projects / trust_router.git / blobdiff