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libwebsockets/lib/abstract/abstract.c
2019-06-29 21:08:36 +01:00

147 lines
3.5 KiB
C

/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2019 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <core/private.h>
#include <abstract/private.h>
extern const lws_abs_transport_t lws_abs_transport_cli_raw_skt,
lws_abs_transport_cli_unit_test;
#if defined(LWS_WITH_SMTP)
extern const lws_abs_protocol_t lws_abs_protocol_smtp;
#endif
static const lws_abs_transport_t * const available_abs_transports[] = {
&lws_abs_transport_cli_raw_skt,
&lws_abs_transport_cli_unit_test,
};
/* HACK: microsoft compiler can't handle zero length array definition */
#if defined(LWS_WITH_SMTP)
static const lws_abs_protocol_t * const available_abs_protocols[] = {
#if defined(LWS_WITH_SMTP)
&lws_abs_protocol_smtp,
#endif
};
#endif
const lws_abs_transport_t *
lws_abs_transport_get_by_name(const char *name)
{
int n;
for (n = 0; n < (int)LWS_ARRAY_SIZE(available_abs_transports); n++)
if (!strcmp(name, available_abs_transports[n]->name))
return available_abs_transports[n];
lwsl_err("%s: cannot find '%s'\n", __func__, name);
return NULL;
}
const lws_abs_protocol_t *
lws_abs_protocol_get_by_name(const char *name)
{
#if defined(LWS_WITH_SMTP)
int n;
for (n = 0; n < (int)LWS_ARRAY_SIZE(available_abs_protocols); n++)
if (!strcmp(name, available_abs_protocols[n]->name))
return available_abs_protocols[n];
#endif
lwsl_err("%s: cannot find '%s'\n", __func__, name);
return NULL;
}
const lws_token_map_t *
lws_abs_get_token(const lws_token_map_t *token_map, short name_index)
{
if (!token_map)
return NULL;
do {
if (token_map->name_index == name_index)
return token_map;
token_map++;
} while (token_map->name_index);
return NULL;
}
void
lws_abs_destroy_instance(lws_abs_t **ai)
{
lws_abs_t *a = *ai;
if (a->api)
a->ap->destroy(&a->api);
if (a->ati)
a->at->destroy(&a->ati);
lws_dll2_remove(&a->abstract_instances);
*ai = NULL;
free(a);
}
lws_abs_t *
lws_abs_bind_and_create_instance(const lws_abs_t *abs)
{
size_t size = sizeof(lws_abs_t) + abs->ap->alloc + abs->at->alloc;
lws_abs_t *ai;
/*
* since we know we will allocate the lws_abs_t, the protocol's
* instance allocation, and the transport's instance allocation,
* we merge it into a single heap allocation
*/
ai = lws_malloc(size, "abs inst");
if (!ai)
return NULL;
*ai = *abs;
ai->ati = NULL;
ai->api = (char *)ai + sizeof(lws_abs_t);
if (ai->ap->create(ai)) {
ai->api = NULL;
goto bail;
}
ai->ati = (char *)ai->api + abs->ap->alloc;
if (ai->at->create(ai)) {
ai->ati = NULL;
goto bail;
}
/* add us to the vhost's dll2 of instances */
lws_dll2_clear(&ai->abstract_instances);
lws_dll2_add_head(&ai->abstract_instances,
&ai->vh->abstract_instances_owner);
return ai;
bail:
lws_abs_destroy_instance(&ai);
return NULL;
}