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/*
* $Header$
*
* Copyright 2006 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include "ccs_common.h"
#include "ccs_os_server.h"
/* Server Globals: */
cci_uuid_string_t g_server_id = NULL;
ccs_cache_collection_t g_cache_collection = NULL;
ccs_pipe_array_t g_client_pipe_array = NULL;
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_initialize (void)
{
cc_int32 err = ccNoError;
if (!err) {
err = cci_identifier_new_uuid (&g_server_id);
}
if (!err) {
err = ccs_cache_collection_new (&g_cache_collection);
}
if (!err) {
err = ccs_pipe_array_new (&g_client_pipe_array);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_cleanup (void)
{
cc_int32 err = ccNoError;
if (!err) {
free (g_server_id);
cci_check_error (ccs_cache_collection_release (g_cache_collection));
cci_check_error (ccs_pipe_array_release (g_client_pipe_array));
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_new_identifier (cci_identifier_t *out_identifier)
{
return cci_check_error (cci_identifier_new (out_identifier,
g_server_id));
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_add_client (ccs_os_pipe_t in_connection_os_pipe)
{
cc_int32 err = ccNoError;
ccs_pipe_t connection_pipe = NULL;
if (!err) {
err = ccs_pipe_new (&connection_pipe, in_connection_os_pipe);
}
if (!err) {
cci_debug_printf ("%s: Adding client %p.", __FUNCTION__, connection_pipe);
err = ccs_pipe_array_insert (g_client_pipe_array,
connection_pipe,
ccs_pipe_array_count (g_client_pipe_array));
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_remove_client (ccs_os_pipe_t in_connection_os_pipe)
{
cc_int32 err = ccNoError;
if (!err) {
cc_uint64 i;
cc_uint64 count = ccs_pipe_array_count (g_client_pipe_array);
cc_uint32 found = 0;
for (i = 0; !err && i < count; i++) {
ccs_pipe_t client = ccs_pipe_array_object_at_index (g_client_pipe_array, i);
err = ccs_pipe_compare_to_os_pipe (client, in_connection_os_pipe, &found);
if (!err && found) {
cci_debug_printf ("%s: Removing client %p.", __FUNCTION__, client);
err = ccs_pipe_array_remove (g_client_pipe_array, i);
break;
}
}
if (!err && !found) {
cci_debug_printf ("WARNING %s() didn't find client in client list.",
__FUNCTION__);
}
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
static cc_int32 ccs_server_request_demux (ccs_pipe_t in_client_pipe,
ccs_pipe_t in_reply_pipe,
ccs_cache_collection_t in_cache_collection,
enum cci_msg_id_t in_request_name,
cci_identifier_t in_request_identifier,
cci_stream_t in_request_data,
cc_uint32 *out_reply_immediately,
cci_stream_t *out_reply_data)
{
cc_int32 err = ccNoError;
if (!ccs_pipe_valid (in_reply_pipe)) { err = cci_check_error (ccErrBadParam); }
if (!in_request_data ) { err = cci_check_error (ccErrBadParam); }
if (!out_reply_immediately ) { err = cci_check_error (ccErrBadParam); }
if (!out_reply_data ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
if (in_request_name > cci_context_first_msg_id &&
in_request_name < cci_context_last_msg_id) {
/* Note: context identifier doesn't need to match.
* Client just uses the identifier to detect server relaunch. */
if (!err) {
err = ccs_cache_collection_handle_message (in_client_pipe,
in_reply_pipe,
in_cache_collection,
in_request_name,
in_request_data,
out_reply_immediately,
out_reply_data);
}
} else if (in_request_name > cci_ccache_first_msg_id &&
in_request_name < cci_ccache_last_msg_id) {
ccs_ccache_t ccache = NULL;
err = ccs_cache_collection_find_ccache (in_cache_collection,
in_request_identifier,
&ccache);
if (!err) {
err = ccs_ccache_handle_message (in_client_pipe,
in_reply_pipe,
ccache,
in_cache_collection,
in_request_name,
in_request_data,
out_reply_immediately,
out_reply_data);
}
} else if (in_request_name > cci_ccache_iterator_first_msg_id &&
in_request_name < cci_ccache_iterator_last_msg_id) {
ccs_ccache_iterator_t ccache_iterator = NULL;
err = ccs_cache_collection_find_ccache_iterator (in_cache_collection,
in_request_identifier,
&ccache_iterator);
if (!err) {
err = ccs_ccache_iterator_handle_message (ccache_iterator,
in_cache_collection,
in_request_name,
in_request_data,
out_reply_data);
}
if (!err) {
*out_reply_immediately = 1; /* can't block */
}
} else if (in_request_name > cci_credentials_iterator_first_msg_id &&
in_request_name < cci_credentials_iterator_last_msg_id) {
ccs_credentials_iterator_t credentials_iterator = NULL;
ccs_ccache_t ccache = NULL;
err = ccs_cache_collection_find_credentials_iterator (in_cache_collection,
in_request_identifier,
&ccache,
&credentials_iterator);
if (!err) {
err = ccs_credentials_iterator_handle_message (credentials_iterator,
ccache,
in_request_name,
in_request_data,
out_reply_data);
}
if (!err) {
*out_reply_immediately = 1; /* can't block */
}
} else {
err = ccErrBadInternalMessage;
}
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_handle_request (ccs_pipe_t in_client_pipe,
ccs_pipe_t in_reply_pipe,
cci_stream_t in_request)
{
cc_int32 err = ccNoError;
enum cci_msg_id_t request_name = 0;
cci_identifier_t request_identifier = NULL;
cc_uint32 reply_immediately = 1;
cci_stream_t reply_data = NULL;
if (!ccs_pipe_valid (in_client_pipe)) { err = cci_check_error (ccErrBadParam); }
if (!ccs_pipe_valid (in_reply_pipe) ) { err = cci_check_error (ccErrBadParam); }
if (!in_request ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_message_read_request_header (in_request,
&request_name,
&request_identifier);
}
if (!err) {
cc_uint32 server_err = 0;
cc_uint32 valid = 0;
ccs_cache_collection_t cache_collection = g_cache_collection;
server_err = cci_identifier_is_for_server (request_identifier,
g_server_id,
&valid);
if (!server_err && !valid) {
server_err = cci_message_invalid_object_err (request_name);
}
if (!server_err) {
/* Monolithic server implementation would need to select
* cache collection here. Currently we only support per-user
* servers so we always use the same cache collection. */
server_err = ccs_server_request_demux (in_client_pipe,
in_reply_pipe,
cache_collection,
request_name,
request_identifier,
in_request,
&reply_immediately,
&reply_data);
}
if (server_err || reply_immediately) {
err = ccs_server_send_reply (in_reply_pipe, server_err, reply_data);
}
}
cci_identifier_release (request_identifier);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 ccs_server_send_reply (ccs_pipe_t in_reply_pipe,
cc_int32 in_reply_err,
cci_stream_t in_reply_data)
{
cc_int32 err = ccNoError;
cci_stream_t reply = NULL;
if (!ccs_pipe_valid (in_reply_pipe) ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_message_new_reply_header (&reply, in_reply_err);
}
if (!err && in_reply_data && cci_stream_size (in_reply_data) > 0) {
err = cci_stream_write (in_reply_data,
cci_stream_data (in_reply_data),
cci_stream_size (in_reply_data));
}
if (!err) {
err = ccs_os_server_send_reply (in_reply_pipe, reply);
}
cci_stream_release (reply);
return cci_check_error (err);
}
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