*
*/
+#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
+#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <jansson.h>
-
+#include <talloc.h>
+#include <tid_internal.h>
#include <gsscon.h>
-#include <tid.h>
+#include <tr_msg.h>
+
+static TID_RESP *tids_create_response (TIDS_INSTANCE *tids, TID_REQ *req)
+{
+ TID_RESP *resp;
+
+ if ((NULL == (resp = talloc_zero(req, TID_RESP)))) {
+ fprintf(stderr, "tids_create_response: Error allocating response structure.\n");
+ return NULL;
+ }
+
+ resp->result = TID_SUCCESS; /* presume success */
+ if ((NULL == (resp->rp_realm = tr_dup_name(req->rp_realm))) ||
+ (NULL == (resp->realm = tr_dup_name(req->realm))) ||
+ (NULL == (resp->comm = tr_dup_name(req->comm)))) {
+ fprintf(stderr, "tids_create_response: Error allocating fields in response.\n");
+ return NULL;
+ }
+ if (req->orig_coi) {
+ if (NULL == (resp->orig_coi = tr_dup_name(req->orig_coi))) {
+ fprintf(stderr, "tids_create_response: Error allocating fields in response.\n");
+ return NULL;
+ }
+ }
+ return resp;
+}
+
+static void tids_destroy_response(TIDS_INSTANCE *tids, TID_RESP *resp)
+{
+ if (resp) {
+ if (resp->err_msg)
+ tr_free_name(resp->err_msg);
+ if (resp->rp_realm)
+ tr_free_name(resp->rp_realm);
+ if (resp->realm)
+ tr_free_name(resp->realm);
+ if (resp->comm)
+ tr_free_name(resp->comm);
+ if (resp->orig_coi)
+ tr_free_name(resp->orig_coi);
+ talloc_free(resp);
+ }
+}
-static int tids_listen (int port)
+static int tids_listen (TIDS_INSTANCE *tids, int port)
{
int rc = 0;
int conn = -1;
- struct sockaddr_storage addr;
- struct sockaddr_in *saddr = (struct sockaddr_in *) &addr;
+ int optval = 1;
+
+ union {
+ struct sockaddr_storage storage;
+ struct sockaddr_in in4;
+ } addr;
+
+ struct sockaddr_in *saddr = (struct sockaddr_in *) &addr.in4;
saddr->sin_port = htons (port);
saddr->sin_family = AF_INET;
if (0 > (conn = socket (AF_INET, SOCK_STREAM, 0)))
return conn;
+ setsockopt(conn, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
+
if (0 > (rc = bind (conn, (struct sockaddr *) saddr, sizeof(struct sockaddr_in))))
return rc;
if (0 > (rc = listen(conn, 512)))
return rc;
- fprintf (stdout, "TID Server listening on port %d\n", port);
+ fprintf (stdout, "tids_listen: TID Server listening on port %d\n", port);
return conn;
}
-static int tids_auth_connection (int conn, gss_ctx_id_t *gssctx)
+static int tids_auth_cb(gss_name_t clientName, gss_buffer_t displayName,
+ void *data)
+{
+ struct tids_instance *inst = (struct tids_instance *) data;
+ TR_NAME name ={(char *) displayName->value,
+ displayName->length};
+ return inst->auth_handler(clientName, &name, inst->cookie);
+}
+
+static int tids_auth_connection (struct tids_instance *inst,
+ int conn, gss_ctx_id_t *gssctx)
{
int rc = 0;
int auth, autherr = 0;
+ gss_buffer_desc nameBuffer = {0, NULL};
+ char *name = 0;
+ int nameLen = 0;
- if (rc = gsscon_passive_authenticate(conn, gssctx)) {
- fprintf(stderr, "Error from gsscon_passive_authenticate(), rc = %d.\n", rc);
+ nameLen = asprintf(&name, "trustidentity@%s", inst->hostname);
+ nameBuffer.length = nameLen;
+ nameBuffer.value = name;
+
+ if (rc = gsscon_passive_authenticate(conn, nameBuffer, gssctx, tids_auth_cb, inst)) {
+ fprintf(stderr, "tids_auth_connection: Error from gsscon_passive_authenticate(), rc = %d.\n", rc);
return -1;
}
if (rc = gsscon_authorize(*gssctx, &auth, &autherr)) {
- fprintf(stderr, "Error from gsscon_authorize, rc = %d, autherr = %d.\n",
+ fprintf(stderr, "tids_auth_connection: Error from gsscon_authorize, rc = %d, autherr = %d.\n",
rc, autherr);
return -1;
}
if (auth)
- fprintf(stdout, "Connection authenticated, conn = %d.\n", conn);
+ fprintf(stdout, "tids_auth_connection: Connection authenticated, conn = %d.\n", conn);
else
- fprintf(stderr, "Authentication failed, conn %d.\n", conn);
+ fprintf(stderr, "tids_auth_connection: Authentication failed, conn %d.\n", conn);
- return auth;
+ return !auth;
}
-static int tids_read_request (int conn, gss_ctx_id_t *gssctx, TID_REQ *req)
+static int tids_read_request (TIDS_INSTANCE *tids, int conn, gss_ctx_id_t *gssctx, TR_MSG **mreq)
{
int err;
char *buf;
return -1;
}
- fprintf(stdout, "Request Received, %d bytes.\n", buflen);
+ fprintf(stdout, "tids_read_request():Request Received, %u bytes.\n", (unsigned) buflen);
- /* Parse request -- TBD */
+ /* Parse request */
+ if (NULL == ((*mreq) = tr_msg_decode(buf, buflen))) {
+ fprintf(stderr, "tids_read_request():Error decoding request.\n");
+ free (buf);
+ return -1;
+ }
- if (buf)
- free(buf);
+ /* If this isn't a TID Request, just drop it. */
+ if (TID_REQUEST != (*mreq)->msg_type) {
+ fprintf(stderr, "tids_read_request(): Not a TID Request, dropped.\n");
+ return -1;
+ }
+ free (buf);
return buflen;
}
-static int tids_handle_request (TID_REQ *req, TID_RESP *resp)
-{
- return 0;
-}
-
-static int tids_send_response (int conn, gss_ctx_id_t *gssctx, TID_RESP *resp)
+static int tids_handle_request (TIDS_INSTANCE *tids, TR_MSG *mreq, TID_RESP *resp)
{
- json_t *jreq;
- int err;
- char *resp_buf;
+ int rc;
- /* Create a json TID response */
- if (NULL == (jreq = json_object())) {
- fprintf(stderr,"Error creating json object.\n");
+ /* Check that this is a valid TID Request. If not, send an error return. */
+ if ((!tr_msg_get_req(mreq)) ||
+ (!tr_msg_get_req(mreq)->rp_realm) ||
+ (!tr_msg_get_req(mreq)->realm) ||
+ (!tr_msg_get_req(mreq)->comm)) {
+ fprintf(stderr, "tids_handle_request():Not a valid TID Request.\n");
+ resp->result = TID_ERROR;
+ resp->err_msg = tr_new_name("Bad request format");
return -1;
}
- if (0 > (err = json_object_set_new(jreq, "type", json_string("tid_response")))) {
- fprintf(stderr, "Error adding type to response.\n");
- return -1;
+ /* Call the caller's request handler */
+ /* TBD -- Handle different error returns/msgs */
+ if (0 > (rc = (*tids->req_handler)(tids, tr_msg_get_req(mreq), resp, tids->cookie))) {
+ /* set-up an error response */
+ resp->result = TID_ERROR;
+ if (!resp->err_msg) /* Use msg set by handler, if any */
+ resp->err_msg = tr_new_name("Internal processing error");
}
- if (0 > (err = json_object_set_new(jreq, "result", json_string("error")))) {
- fprintf(stderr, "Error adding result to response.\n");
- return -1;
+ else {
+ /* set-up a success response */
+ resp->result = TID_SUCCESS;
+ resp->err_msg = NULL; /* No error msg on successful return */
}
- if (0 > (err = json_object_set_new(jreq, "msg", json_string("No path to realm")))) {
- fprintf(stderr, "Error adding msg to response.\n");
+
+ return rc;
+}
+
+int tids_send_err_response (TIDS_INSTANCE *tids, TID_REQ *req, const char *err_msg) {
+ TID_RESP *resp = NULL;
+ int rc = 0;
+
+ /* If we already sent a response, don't send another no matter what. */
+ if (req->resp_sent)
+ return 0;
+
+ if (NULL == (resp = tids_create_response(tids, req))) {
+ fprintf(stderr, "tids_send_err_response: Can't create response.\n");
return -1;
}
- /* Encode the json response */
- if (NULL == (resp_buf = json_dumps(jreq, 0))) {
- fprintf(stderr, "Error encoding json response.\n");
+ /* mark this as an error response, and include the error message */
+ resp->result = TID_ERROR;
+ resp->err_msg = tr_new_name((char *)err_msg);
+
+ rc = tids_send_response(tids, req, resp);
+
+ tids_destroy_response(tids, resp);
+ return rc;
+}
+
+int tids_send_response (TIDS_INSTANCE *tids, TID_REQ *req, TID_RESP *resp)
+{
+ int err;
+ TR_MSG mresp;
+ char *resp_buf;
+
+ if ((!tids) || (!req) || (!resp))
+ fprintf (stderr, "tids_send_response: Invalid parameters.\n");
+
+ /* Never send a second response if we already sent one. */
+ if (req->resp_sent)
+ return 0;
+
+ mresp.msg_type = TID_RESPONSE;
+ tr_msg_set_resp(&mresp, resp);
+
+ if (NULL == (resp_buf = tr_msg_encode(&mresp))) {
+ fprintf(stderr, "tids_send_response: Error encoding json response.\n");
return -1;
}
+
+ fprintf(stderr, "tids_send_response: Encoded response:\n%s\n", resp_buf);
- printf("Encoded response:\n%s\n", resp_buf);
-
- /* Send the request over the connection */
- if (err = gsscon_write_encrypted_token (conn, *gssctx, resp_buf,
+ /* Send the response over the connection */
+ if (err = gsscon_write_encrypted_token (req->conn, req->gssctx, resp_buf,
strlen(resp_buf) + 1)) {
- fprintf(stderr, "Error sending request over connection.\n");
+ fprintf(stderr, "tids_send_response: Error sending response over connection.\n");
return -1;
}
+ /* indicate that a response has been sent for this request */
+ req->resp_sent = 1;
+
free(resp_buf);
return 0;
-
}
-static void tids_handle_connection (int conn)
+static void tids_handle_connection (TIDS_INSTANCE *tids, int conn)
{
- TID_REQ req;
- TID_RESP resp;
- int rc;
+ TR_MSG *mreq = NULL;
+ TID_RESP *resp = NULL;
+ int rc = 0;
gss_ctx_id_t gssctx = GSS_C_NO_CONTEXT;
- if (!tids_auth_connection(conn, &gssctx)) {
- fprintf(stderr, "Error authorizing TID Server connection, rc = %d.\n", rc);
+ if (tids_auth_connection(tids, conn, &gssctx)) {
+ fprintf(stderr, "tids_handle_connection: Error authorizing TID Server connection.\n");
close(conn);
return;
}
- printf("Connection authorized!\n");
+ fprintf(stdout, "tids_handle_connection: Connection authorized!\n");
while (1) { /* continue until an error breaks us out */
- if (0 > (rc = tids_read_request(conn, &gssctx, &req))) {
- fprintf(stderr, "Error from tids_read_request(), rc = %d.\n", rc);
+ if (0 > (rc = tids_read_request(tids, conn, &gssctx, &mreq))) {
+ fprintf(stderr, "tids_handle_connection: Error from tids_read_request(), rc = %d.\n", rc);
return;
} else if (0 == rc) {
continue;
}
- if (0 > (rc = tids_handle_request(&req, &resp))) {
- fprintf(stderr, "Error from tids_handle_request(), rc = %d.\n", rc);
+ /* Put connection information into the request structure */
+ tr_msg_get_req(mreq)->conn = conn;
+ tr_msg_get_req(mreq)->gssctx = gssctx;
+
+ /* Allocate a response structure and populate common fields */
+ if (NULL == (resp = tids_create_response (tids, tr_msg_get_req(mreq)))) {
+ fprintf(stderr, "tids_handle_connection: Error creating response structure.\n");
+ /* try to send an error */
+ tids_send_err_response(tids, tr_msg_get_req(mreq), "Error creating response.\n");
return;
}
- if (0 > (rc = tids_send_response(conn, &gssctx, &resp))) {
- fprintf(stderr, "Error from tids_send_response(), rc = %d.\n", rc);
- return;
+ if (0 > (rc = tids_handle_request(tids, mreq, resp))) {
+ fprintf(stderr, "tids_handle_connection: Error from tids_handle_request(), rc = %d.\n", rc);
+ /* Fall through, to send the response, either way */
}
- }
- return;
+ if (0 > (rc = tids_send_response(tids, tr_msg_get_req(mreq), resp))) {
+ fprintf(stderr, "tids_handle_connection: Error from tids_send_response(), rc = %d.\n", rc);
+ /* if we didn't already send a response, try to send a generic error. */
+ if (!tr_msg_get_req(mreq)->resp_sent)
+ tids_send_err_response(tids, tr_msg_get_req(mreq), "Error sending response.\n");
+ /* Fall through to free the response, either way. */
+ }
+
+ tids_destroy_response(tids, resp);
+ return;
+ }
}
-TIDS_INSTANCE *tids_create ()
+TIDS_INSTANCE *tids_create (void)
{
- TIDS_INSTANCE *tids = 0;
+ TIDS_INSTANCE *tids = NULL;
if (tids = malloc(sizeof(TIDS_INSTANCE)))
memset(tids, 0, sizeof(TIDS_INSTANCE));
return tids;
int tids_start (TIDS_INSTANCE *tids,
TIDS_REQ_FUNC *req_handler,
+ tids_auth_func *auth_handler,
+ const char *hostname,
+ unsigned int port,
void *cookie)
{
int listen = -1;
int conn = -1;
pid_t pid;
- if (0 > (listen = tids_listen(TID_PORT)))
+ if (0 > (listen = tids_listen(tids, port)))
perror ("Error from tids_listen()");
+ /* store the caller's request handler & cookie */
+ tids->req_handler = req_handler;
+ tids->auth_handler = auth_handler;
+ tids->hostname = hostname;
+ tids->cookie = cookie;
+
while(1) { /* accept incoming conns until we are stopped */
if (0 > (conn = accept(listen, NULL, NULL))) {
if (pid == 0) {
close(listen);
- tids_handle_connection(conn);
+ tids_handle_connection(tids, conn);
close(conn);
- exit(0);
+ return 0;
} else {
close(conn);
}
+
+ /* clean up any processes that have completed */
+ while (waitpid(-1, 0, WNOHANG) >= 0);
}
- return 1; /* should never get here */
+ return 1; /* should never get here, loops "forever" */
}
void tids_destroy (TIDS_INSTANCE *tids)
{
- free(tids);
+ if (tids)
+ free(tids);
}
projects / trust_router.git / blobdiff