source: mainline/uspace/app/wifi_supplicant/wifi_supplicant.c

/*
 * 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 nic
 * @{
 */
/** @file WiFi device configuration utility.
 *
 */

#include <ieee80211_iface.h>

#include <inet/inetcfg.h>
#include <inet/dhcp.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <str.h>
#include <str_error.h>
#include <loc.h>

#define NAME  "wifi_supplicant"

#define enum_name(name_arr, i) \
        ((i < 0) ? "NA" : name_arr[i])

static const char *ieee80211_security_type_strs[] = {
        "OPEN", "WEP", "WPA", "WPA2"
};

static const char *ieee80211_security_alg_strs[] = {
        "WEP40", "WEP104", "CCMP", "TKIP"
};

static const char *ieee80211_security_auth_strs[] = {
        "PSK", "8021X"
};

static void print_syntax(void)
{
        printf("syntax:\n");
        printf("\t" NAME " [<cmd> [<args...>]]\n");
        printf("\t<cmd> is:\n");
        printf("\tlist - list wifi devices in <index>: <name> format\n");
        printf("\tscan <index> [-n] - output scan results (force scan "
            "immediately)\n");
        printf("\tconnect <index> <ssid_prefix> [<password>] - connect to "
            "network\n");
        printf("\tdisconnect <index> - disconnect from network\n");
}

static void nic_addr_format(nic_address_t *addr, char *out, size_t out_size)
{
        snprintf(out, out_size, "%02x:%02x:%02x:%02x:%02x:%02x",
            addr->address[0], addr->address[1], addr->address[2],
            addr->address[3], addr->address[4], addr->address[5]);
}

static errno_t get_wifi_list(service_id_t **wifis, size_t *count)
{
        category_id_t wifi_cat;
        errno_t rc = loc_category_get_id("ieee80211", &wifi_cat, 0);
        if (rc != EOK) {
                printf("Error resolving category 'ieee80211'.\n");
                return rc;
        }

        rc = loc_category_get_svcs(wifi_cat, wifis, count);
        if (rc != EOK) {
                printf("Error getting list of WIFIs.\n");
                return rc;
        }

        return EOK;
}

static async_sess_t *get_wifi_by_index(size_t i)
{
        service_id_t *wifis = NULL;
        size_t count;

        errno_t rc = get_wifi_list(&wifis, &count);
        if (rc != EOK) {
                printf("Error fetching wifi list.\n");
                return NULL;
        }

        if (i >= count) {
                printf("Invalid wifi index.\n");
                free(wifis);
                return NULL;
        }

        async_sess_t *sess =
            loc_service_connect(wifis[i], INTERFACE_DDF, 0);
        if (sess == NULL) {
                printf("Error connecting to service.\n");
                free(wifis);
                return NULL;
        }

        return sess;
}

static errno_t wifi_list(void)
{
        service_id_t *wifis = NULL;
        size_t count;

        errno_t rc = get_wifi_list(&wifis, &count);
        if (rc != EOK) {
                printf("Error fetching wifi list: %s\n", str_error(rc));
                return EINVAL;
        }

        printf("[Index]: [Service Name]\n");
        for (size_t i = 0; i < count; i++) {
                char *svc_name;
                rc = loc_service_get_name(wifis[i], &svc_name);
                if (rc != EOK) {
                        printf("Error getting service name: %s\n", str_error(rc));
                        free(wifis);
                        return rc;
                }

                printf("%zu: %s\n", i, svc_name);

                free(svc_name);
        }

        return EOK;
}

static errno_t wifi_connect(uint32_t index, char *ssid_start, char *password)
{
        assert(ssid_start);

        async_sess_t *sess = get_wifi_by_index(index);
        if (sess == NULL) {
                printf("Specified WIFI doesn't exist or cannot connect to "
                    "it.\n");
                return EINVAL;
        }

        errno_t rc = ieee80211_disconnect(sess);
        if (rc != EOK) {
                if (rc == EREFUSED)
                        printf("Device is not ready yet.\n");
                else
                        printf("Error when disconnecting device: %s\n",
                            str_error(rc));

                return rc;
        }

        rc = ieee80211_connect(sess, ssid_start, password);
        if (rc != EOK) {
                if (rc == EREFUSED)
                        printf("Device is not ready yet.\n");
                else if (rc == ETIMEOUT)
                        printf("Timeout when authenticating to network.\n");
                else if (rc == ENOENT)
                        printf("Given SSID not in scan results.\n");
                else
                        printf("Error when connecting to network: %s\n",
                            str_error(rc));

                return rc;
        }

        // TODO: Wait for DHCP address?

        printf("Successfully connected to network!\n");

        return EOK;
}

static errno_t wifi_disconnect(uint32_t index)
{
        async_sess_t *sess = get_wifi_by_index(index);
        if (sess == NULL) {
                printf("Specified WIFI doesn't exist or cannot connect to "
                    "it.\n");
                return EINVAL;
        }

        errno_t rc = ieee80211_disconnect(sess);
        if (rc != EOK) {
                if (rc == EREFUSED)
                        printf("Device is not ready yet.\n");
                else if (rc == EINVAL)
                        printf("Not connected to any WiFi network.\n");
                else
                        printf("Error when disconnecting from network: %s\n",
                            str_error(rc));

                return rc;
        }

        printf("Successfully disconnected.\n");

        return EOK;
}

static errno_t wifi_scan(uint32_t index, bool now)
{
        async_sess_t *sess = get_wifi_by_index(index);
        if (sess == NULL) {
                printf("Specified WIFI doesn't exist or cannot connect to "
                    "it.\n");
                return EINVAL;
        }

        ieee80211_scan_results_t scan_results;
        errno_t rc = ieee80211_get_scan_results(sess, &scan_results, now);
        if (rc != EOK) {
                if (rc == EREFUSED)
                        printf("Device is not ready yet.\n");
                else
                        printf("Failed to fetch scan results: %s\n",
                            str_error(rc));

                return rc;
        }

        if (scan_results.length == 0)
                return EOK;

        printf("%16.16s %17s %4s %5s %5s %7s %7s\n",
            "SSID", "MAC", "CHAN", "TYPE", "AUTH", "UNI-ALG", "GRP-ALG");

        for (uint8_t i = 0; i < scan_results.length; i++) {
                ieee80211_scan_result_t result = scan_results.results[i];
                char mac_addr_hex[18];
                nic_addr_format(&result.bssid, mac_addr_hex, 18);

                printf("%16.16s %17s %4d %5s %5s %7s %7s\n",
                    result.ssid, mac_addr_hex,
                    result.channel,
                    enum_name(ieee80211_security_type_strs, result.security.type),
                    enum_name(ieee80211_security_auth_strs, result.security.auth),
                    enum_name(ieee80211_security_alg_strs, result.security.pair_alg),
                    enum_name(ieee80211_security_alg_strs, result.security.group_alg));
        }

        return EOK;
}

int main(int argc, char *argv[])
{
        errno_t rc = inetcfg_init();
        if (rc != EOK) {
                printf("%s: Failed connecting to inetcfg service: %s.\n",
                    NAME, str_error(rc));
                return 1;
        }

        rc = dhcp_init();
        if (rc != EOK) {
                printf("%s: Failed connecting to dhcp service: %s.\n",
                    NAME, str_error(rc));
                return 1;
        }

        if (argc == 2) {
                if (!str_cmp(argv[1], "list"))
                        return wifi_list();
        } else if (argc > 2) {
                uint32_t index;
                rc = str_uint32_t(argv[2], NULL, 10, false, &index);
                if (rc != EOK) {
                        printf("%s: Invalid argument.\n", NAME);
                        print_syntax();
                        return EINVAL;
                }

                if (!str_cmp(argv[1], "scan")) {
                        bool now = false;
                        if (argc > 3)
                                if (!str_cmp(argv[3], "-n"))
                                        now = true;

                        return wifi_scan(index, now);
                } else if (!str_cmp(argv[1], "connect")) {
                        char *pass = NULL;
                        if (argc > 3) {
                                if (argc > 4)
                                        pass = argv[4];

                                return wifi_connect(index, argv[3], pass);
                        }
                } else if (!str_cmp(argv[1], "disconnect"))
                        return wifi_disconnect(index);
        }

        print_syntax();

        return EOK;
}

/** @}
 */