/**
* Read a request from the GSS connection
*
* @param mem_ctx talloc context for the result
* @param conn file descriptor for the connection
* @param gssctx GSS context
* @return talloc'ed string containing the request, or null on error
*/
static char *tr_gss_read_req(TALLOC_CTX *mem_ctx, int conn, gss_ctx_id_t gssctx)
{
int err;
char *retval = NULL;
char *buf = NULL;
size_t buflen = 0;
err = gsscon_read_encrypted_token(conn, gssctx, &buf, &buflen);
if (err || (buf == NULL)) {
if (buf)
free(buf);
tr_debug("tr_gss_read_req: Error reading from connection, rc=%d", err);
return NULL;
}
tr_debug("tr_gss_read_req: Read %u bytes.", (unsigned) buflen);
// get a talloc'ed version, guaranteed to have a null termination
retval = talloc_asprintf(mem_ctx, "%.*s", (int) buflen, buf);
free(buf);
return retval;
}
int tidc_fwd_request(TIDC_INSTANCE *tidc,
TID_REQ *tid_req,
TIDC_RESP_FUNC *resp_handler,
void *cookie)
{
char *req_buf = NULL;
char *resp_buf = NULL;
size_t resp_buflen = 0;
TR_MSG *msg = NULL;
TR_MSG *resp_msg = NULL;
int err;
int rc = 0;
/* Create and populate a TID msg structure */
if (!(msg = talloc_zero(tid_req, TR_MSG)))
goto error;
msg->msg_type = TID_REQUEST;
tr_msg_set_req(msg, tid_req);
/* store the response function and cookie */
// tid_req->resp_func = resp_handler;
// tid_req->cookie = cookie;
/* Encode the request into a json string */
if (!(req_buf = tr_msg_encode(msg))) {
tr_err("tidc_fwd_request: Error encoding TID request.\n");
goto error;
}
tr_debug( "tidc_fwd_request: Sending TID request:\n");
tr_debug( "%s\n", req_buf);
/* Send the request over the connection */
if (err = gsscon_write_encrypted_token (tid_req->conn, tid_req->gssctx, req_buf,
strlen(req_buf))) {
tr_err( "tidc_fwd_request: Error sending request over connection.\n");
goto error;
}
/* TBD -- queue request on instance, read resps in separate thread */
/* Read the response from the connection */
/* TBD -- timeout? */
if (err = gsscon_read_encrypted_token(tid_req->conn, tid_req->gssctx, &resp_buf, &resp_buflen)) {
if (resp_buf)
free(resp_buf);
goto error;
}
tr_debug( "tidc_fwd_request: Response Received (%u bytes).\n", (unsigned) resp_buflen);
tr_debug( "%s\n", resp_buf);
if (NULL == (resp_msg = tr_msg_decode(resp_buf, resp_buflen))) {
tr_err( "tidc_fwd_request: Error decoding response.\n");
goto error;
}
/* TBD -- Check if this is actually a valid response */
if (TID_RESPONSE != tr_msg_get_msg_type(resp_msg)) {
tr_err( "tidc_fwd_request: Error, no response in the response!\n");
goto error;
}
if (resp_handler) {
/* Call the caller's response function. It must copy any data it needs before returning. */
tr_debug("tidc_fwd_request: calling response callback function.");
(*resp_handler)(tidc, tid_req, tr_msg_get_resp(resp_msg), cookie);
}
goto cleanup;
error:
rc = -1;
cleanup:
if (msg)
talloc_free(msg);
if (req_buf)
free(req_buf);
if (resp_buf)
free(resp_buf);
if (resp_msg)
tr_msg_free_decoded(resp_msg);
return rc;
}