source: mainline/uspace/lib/drv/generic/remote_ieee80211.c@ 1dcc0b9

/*
 * Copyright (c) 2015 Jan Kolarik
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libdrv
 * @{
 */
/**
 * @file
 * @brief Driver-side RPC skeletons for IEEE 802.11 interface
 */

#include <errno.h>
#include <macros.h>
#include <str.h>

#include "ops/ieee80211.h"
#include "ieee80211_iface.h"

#define MAX_STRING_SIZE 32

/** IEEE 802.11 RPC functions IDs. */
typedef enum {
        IEEE80211_GET_SCAN_RESULTS,
        IEEE80211_CONNECT,
        IEEE80211_DISCONNECT
} ieee80211_funcs_t;

/** Get scan results from IEEE 802.11 device
 *
 * @param[in] dev_sess Device session.
 * @param[out] results Structure where to put scan results.
 *
 * @return EOK If the operation was successfully completed,
 * negative error code otherwise.
 */
int ieee80211_get_scan_results(async_sess_t *dev_sess, 
        ieee80211_scan_results_t *results, bool now)
{
        assert(results);
        
        async_exch_t *exch = async_exchange_begin(dev_sess);
        
        aid_t aid = async_send_2(exch, DEV_IFACE_ID(IEEE80211_DEV_IFACE),
            IEEE80211_GET_SCAN_RESULTS, now, NULL);
        int rc = async_data_read_start(exch, results, sizeof(ieee80211_scan_results_t));
        async_exchange_end(exch);

        sysarg_t res;
        async_wait_for(aid, &res);
        
        if(res != EOK)
                return (int) res;
        else
                return rc;
}

/** Connect to specified network.
 *
 * @param[in] dev_sess Device session.
 * @param[in] ssid_start Network SSID prefix.
 * @param[in] password Network password (pass empty string if not needed).
 *
 * @return EOK If the operation was successfully completed,
 * negative error code otherwise.
 */
int ieee80211_connect(async_sess_t *dev_sess, char *ssid_start, char *password)
{
        assert(ssid_start);
        
        sysarg_t rc_orig;
        
        async_exch_t *exch = async_exchange_begin(dev_sess);
        
        aid_t aid = async_send_1(exch, DEV_IFACE_ID(IEEE80211_DEV_IFACE),
            IEEE80211_CONNECT, NULL);
        
        sysarg_t rc = async_data_write_start(exch, ssid_start, 
                str_size(ssid_start) + 1);
        if (rc != EOK) {
                async_exchange_end(exch);
                async_wait_for(aid, &rc_orig);
                
                if (rc_orig == EOK)
                        return (int) rc;
                else
                        return (int) rc_orig;
        }
        
        if(password == NULL) {
                password = (char *) "";
        }
        
        rc = async_data_write_start(exch, password, str_size(password) + 1);
        if (rc != EOK) {
                async_exchange_end(exch);
                async_wait_for(aid, &rc_orig);
                
                if (rc_orig == EOK)
                        return (int) rc;
                else
                        return (int) rc_orig;
        }
        
        async_exchange_end(exch);

        async_wait_for(aid, &rc);
        
        return (int) rc;
}

/** Disconnect device from network.
 *
 * @param[in] dev_sess Device session.
 *
 * @return EOK If the operation was successfully completed,
 * negative error code otherwise.
 */
int ieee80211_disconnect(async_sess_t *dev_sess)
{
        async_exch_t *exch = async_exchange_begin(dev_sess);
        int rc = async_req_1_0(exch, DEV_IFACE_ID(IEEE80211_DEV_IFACE),
            IEEE80211_DISCONNECT);
        async_exchange_end(exch);
        
        return rc;
}

static void remote_ieee80211_get_scan_results(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        ieee80211_iface_t *ieee80211_iface = (ieee80211_iface_t *) iface;
        assert(ieee80211_iface->get_scan_results);
        
        ieee80211_scan_results_t scan_results;
        memset(&scan_results, 0, sizeof(ieee80211_scan_results_t));
        
        bool now = IPC_GET_ARG2(*call);
        
        int rc = ieee80211_iface->get_scan_results(fun, &scan_results, now);
        if (rc == EOK) {
                ipc_callid_t data_callid;
                size_t max_len;
                if (!async_data_read_receive(&data_callid, &max_len)) {
                        async_answer_0(data_callid, EINVAL);
                        async_answer_0(callid, EINVAL);
                        return;
                }
                
                if (max_len < sizeof(ieee80211_scan_results_t)) {
                        async_answer_0(data_callid, ELIMIT);
                        async_answer_0(callid, ELIMIT);
                        return;
                }
                
                async_data_read_finalize(data_callid, &scan_results,
                    sizeof(ieee80211_scan_results_t));
        }
        
        async_answer_0(callid, rc);
}

static void remote_ieee80211_connect(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        ieee80211_iface_t *ieee80211_iface = (ieee80211_iface_t *) iface;
        assert(ieee80211_iface->connect);
        
        char ssid_start[MAX_STRING_SIZE];
        char password[MAX_STRING_SIZE];
        
        ipc_callid_t data_callid;
        size_t len;
        if (!async_data_write_receive(&data_callid, &len)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }
        
        if (len > MAX_STRING_SIZE) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }
        
        int rc = async_data_write_finalize(data_callid, ssid_start, len);
        if (rc != EOK) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }
        
        if (!async_data_write_receive(&data_callid, &len)) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }
        
        if (len > MAX_STRING_SIZE) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }
        
        rc = async_data_write_finalize(data_callid, password, len);
        if (rc != EOK) {
                async_answer_0(data_callid, EINVAL);
                async_answer_0(callid, EINVAL);
                return;
        }
        
        rc = ieee80211_iface->connect(fun, ssid_start, password);
        
        async_answer_0(callid, rc);
}

static void remote_ieee80211_disconnect(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        ieee80211_iface_t *ieee80211_iface = (ieee80211_iface_t *) iface;
        assert(ieee80211_iface->disconnect);
        int rc = ieee80211_iface->disconnect(fun);
        async_answer_0(callid, rc);
}

/** Remote IEEE 802.11 interface operations.
 *
 */
static const remote_iface_func_ptr_t remote_ieee80211_iface_ops[] = {
        [IEEE80211_GET_SCAN_RESULTS] = remote_ieee80211_get_scan_results,
        [IEEE80211_CONNECT] = remote_ieee80211_connect,
        [IEEE80211_DISCONNECT] = remote_ieee80211_disconnect
};

/** Remote IEEE 802.11 interface structure.
 *
 * Interface for processing request from remote
 * clients addressed to the IEEE 802.11 interface.
 *
 */
const remote_iface_t remote_ieee80211_iface = {
        .method_count = ARRAY_SIZE(remote_ieee80211_iface_ops),
        .methods = remote_ieee80211_iface_ops
};

/**
 * @}
 */