/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include "sd-network.h"

#include "alloc-util.h"

#include "network-util.h"

#include "string-table.h"

#include "string-util.h"

#include "strv.h"

bool network_is_online(void) {

        _cleanup_free_ char *online_state = NULL;

        LinkOnlineState state;

        int r;

        r = sd_network_get_online_state(&online_state);

        if (r < 0)

                state = _LINK_ONLINE_STATE_INVALID;

        else

                state = link_online_state_from_string(online_state);

        if (state >= LINK_ONLINE_STATE_PARTIAL)

                return true;

        else if (state < 0) {

                _cleanup_free_ char *carrier_state = NULL, *addr_state = NULL;

                r = sd_network_get_carrier_state(&carrier_state);

                if (r < 0) /* if we don't know anything, we consider the system online */

                        return true;

                r = sd_network_get_address_state(&addr_state);

                if (r < 0) /* if we don't know anything, we consider the system online */

                        return true;

                /* we don't know the online state for certain, so make an educated guess */

                if (STR_IN_SET(carrier_state, "degraded-carrier", "carrier") &&

                    STR_IN_SET(addr_state, "routable", "degraded"))

                        return true;

        }

        return false;

}

static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {

        [LINK_OPERSTATE_MISSING]          = "missing",

        [LINK_OPERSTATE_OFF]              = "off",

        [LINK_OPERSTATE_NO_CARRIER]       = "no-carrier",

        [LINK_OPERSTATE_DORMANT]          = "dormant",

        [LINK_OPERSTATE_DEGRADED_CARRIER] = "degraded-carrier",

        [LINK_OPERSTATE_CARRIER]          = "carrier",

        [LINK_OPERSTATE_DEGRADED]         = "degraded",

        [LINK_OPERSTATE_ENSLAVED]         = "enslaved",

        [LINK_OPERSTATE_ROUTABLE]         = "routable",

};

DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);

static const char* const link_carrier_state_table[_LINK_CARRIER_STATE_MAX] = {

        [LINK_CARRIER_STATE_OFF]              = "off",

        [LINK_CARRIER_STATE_NO_CARRIER]       = "no-carrier",

        [LINK_CARRIER_STATE_DORMANT]          = "dormant",

        [LINK_CARRIER_STATE_DEGRADED_CARRIER] = "degraded-carrier",

        [LINK_CARRIER_STATE_CARRIER]          = "carrier",

        [LINK_CARRIER_STATE_ENSLAVED]         = "enslaved",

};

DEFINE_STRING_TABLE_LOOKUP(link_carrier_state, LinkCarrierState);

static const char* const link_required_address_family_table[_ADDRESS_FAMILY_MAX] = {

        [ADDRESS_FAMILY_NO]   = "any",

        [ADDRESS_FAMILY_IPV4] = "ipv4",

        [ADDRESS_FAMILY_IPV6] = "ipv6",

        [ADDRESS_FAMILY_YES]  = "both",

};

DEFINE_STRING_TABLE_LOOKUP(link_required_address_family, AddressFamily);

static const char* const link_address_state_table[_LINK_ADDRESS_STATE_MAX] = {

        [LINK_ADDRESS_STATE_OFF]      = "off",

        [LINK_ADDRESS_STATE_DEGRADED] = "degraded",

        [LINK_ADDRESS_STATE_ROUTABLE] = "routable",

};

DEFINE_STRING_TABLE_LOOKUP(link_address_state, LinkAddressState);

static const char *const link_online_state_table[_LINK_ONLINE_STATE_MAX] = {

        [LINK_ONLINE_STATE_OFFLINE] = "offline",

        [LINK_ONLINE_STATE_PARTIAL] = "partial",

        [LINK_ONLINE_STATE_ONLINE]  = "online",

};

DEFINE_STRING_TABLE_LOOKUP(link_online_state, LinkOnlineState);

int parse_operational_state_range(const char *s, LinkOperationalStateRange *ret) {

        LinkOperationalStateRange range = LINK_OPERSTATE_RANGE_INVALID;

        _cleanup_free_ char *buf = NULL;

        const char *p;

        assert(s);

        assert(ret);

        /* allowed formats: "min", "min:", "min:max", ":max" */

        if (isempty(s) || streq(s, ":"))

                return -EINVAL;

        p = strchr(s, ':');

        if (!p || isempty(p + 1))

                range.max = LINK_OPERSTATE_ROUTABLE;

        else {

                range.max = link_operstate_from_string(p + 1);

                if (range.max < 0)

                        return -EINVAL;

        }

        if (p) {

                buf = strndup(s, p - s);

                if (!buf)

                        return -ENOMEM;

                s = buf;

        }

        if (isempty(s))

                range.min = LINK_OPERSTATE_MISSING;

        else {

                range.min = link_operstate_from_string(s);

                if (range.min < 0)

                        return -EINVAL;

        }

        if (!operational_state_range_is_valid(&range))

                return -EINVAL;

        *ret = range;

        return 0;

}

int network_link_get_operational_state(int ifindex, LinkOperationalState *ret) {

        _cleanup_free_ char *str = NULL;

        LinkOperationalState s;

        int r;

        assert(ifindex > 0);

        assert(ret);

        r = sd_network_link_get_operational_state(ifindex, &str);

        if (r < 0)

                return r;

        s = link_operstate_from_string(str);

        if (s < 0)

                return s;

        *ret = s;

        return 0;

}