/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2008 - 2017 Red Hat, Inc.
 */

#ifndef _UTILS_H_
#define _UTILS_H_

#include "nm-connection.h"
#include "libnm-base/nm-ethtool-base.h"

#include "shvar.h"

/*****************************************************************************/

typedef enum {
    NMS_IFCFG_KEY_TYPE_UNKNOWN    = 0,
    NMS_IFCFG_KEY_TYPE_WELL_KNOWN = (1u << 0),

    NMS_IFCFG_KEY_TYPE_IS_PLAIN    = (1u << 1),
    NMS_IFCFG_KEY_TYPE_IS_NUMBERED = (1u << 2),
    NMS_IFCFG_KEY_TYPE_IS_PREFIX   = (1u << 3),

    /* by default, well knowns keys that are not explicitly set
     * by the writer (the unvisited, dirty ones) are removed.
     * With this flag, such keys are kept if they are present. */
    NMS_IFCFG_KEY_TYPE_KEEP_WHEN_DIRTY = (1u << 4),

} NMSIfcfgKeyTypeFlags;

typedef struct {
    const char          *key_name;
    NMSIfcfgKeyTypeFlags key_flags;
} NMSIfcfgKeyTypeInfo;

extern const NMSIfcfgKeyTypeInfo nms_ifcfg_well_known_keys[263];

const NMSIfcfgKeyTypeInfo *nms_ifcfg_well_known_key_find_info(const char *key, gssize *out_idx);

static inline NMSIfcfgKeyTypeFlags
nms_ifcfg_well_known_key_find_info_flags(const char *key)
{
    const NMSIfcfgKeyTypeInfo *ti;

    ti = nms_ifcfg_well_known_key_find_info(key, NULL);
    if (!ti)
        return NMS_IFCFG_KEY_TYPE_UNKNOWN;
    return ti->key_flags;
}

/*****************************************************************************/

gboolean nms_ifcfg_rh_utils_parse_unhandled_spec(const char  *unhandled_spec,
                                                 const char **out_unmanaged_spec,
                                                 const char **out_unrecognized_spec);

#define NM_IFCFG_CONNECTION_LOG_PATH(path) ((path) ?: "in-memory")
#define NM_IFCFG_CONNECTION_LOG_FMT        "%s (%s,\"%s\")"
#define NM_IFCFG_CONNECTION_LOG_ARG(con)                                      \
    NM_IFCFG_CONNECTION_LOG_PATH(                                             \
        nm_settings_connection_get_filename((NMSettingsConnection *) (con))), \
        nm_settings_connection_get_uuid((NMSettingsConnection *) (con)),      \
        nm_settings_connection_get_id((NMSettingsConnection *) (con))
#define NM_IFCFG_CONNECTION_LOG_FMTD "%s (%s,\"%s\",%p)"
#define NM_IFCFG_CONNECTION_LOG_ARGD(con)                                     \
    NM_IFCFG_CONNECTION_LOG_PATH(                                             \
        nm_settings_connection_get_filename((NMSettingsConnection *) (con))), \
        nm_settings_connection_get_uuid((NMSettingsConnection *) (con)),      \
        nm_settings_connection_get_id((NMSettingsConnection *) (con)), (con)

char *utils_cert_path(const char *parent, const char *suffix, const char *extension);

const char *utils_get_ifcfg_name(const char *file, gboolean only_ifcfg);

gboolean utils_should_ignore_file(const char *filename, gboolean only_ifcfg);

char *utils_get_ifcfg_path(const char *parent);
char *utils_get_keys_path(const char *parent);
char *utils_get_route_path(const char *parent);
char *utils_get_route6_path(const char *parent);

shvarFile *utils_get_extra_ifcfg(const char *parent, const char *tag, gboolean should_create);
shvarFile *utils_get_keys_ifcfg(const char *parent, gboolean should_create);
shvarFile *utils_get_route_ifcfg(const char *parent, gboolean should_create);

gboolean utils_has_route_file_new_syntax(const char *filename);
gboolean utils_has_route_file_new_syntax_content(const char *contents, gsize len);
gboolean utils_has_complex_routes(const char *filename, int addr_family);

gboolean utils_is_ifcfg_alias_file(const char *alias, const char *ifcfg);

char *utils_detect_ifcfg_path(const char *path, gboolean only_ifcfg);

void     nms_ifcfg_rh_utils_user_key_encode(const char *key, GString *str_buffer);
gboolean nms_ifcfg_rh_utils_user_key_decode(const char *name, GString *str_buffer);

static inline const char *
_nms_ifcfg_rh_utils_numbered_tag(char *buf, gsize buf_len, const char *tag_name, int which)
{
    gsize l;

#if NM_MORE_ASSERTS > 5
    nm_assert(NM_FLAGS_ALL(nms_ifcfg_well_known_key_find_info_flags(tag_name),
                           NMS_IFCFG_KEY_TYPE_WELL_KNOWN | NMS_IFCFG_KEY_TYPE_IS_NUMBERED));
#endif

    l = g_strlcpy(buf, tag_name, buf_len);
    nm_assert(l < buf_len);
    if (which != -1) {
        buf_len -= l;
        l = g_snprintf(&buf[l], buf_len, "%d", which);
        nm_assert(l < buf_len);
    }
    return buf;
}
#define numbered_tag(buf, tag_name, which)                                                \
    ({                                                                                    \
        _nm_unused char *const _buf = (buf);                                              \
                                                                                          \
        /* some static assert trying to ensure that the buffer is statically allocated.
         * It disallows a buffer size of sizeof(gpointer) to catch that. */   \
        G_STATIC_ASSERT(G_N_ELEMENTS(buf) == sizeof(buf) && sizeof(buf) != sizeof(char *) \
                        && sizeof(buf) < G_MAXINT);                                       \
        _nms_ifcfg_rh_utils_numbered_tag(buf, sizeof(buf), "" tag_name "", (which));      \
    })

gboolean nms_ifcfg_rh_utils_is_numbered_tag_impl(const char *key,
                                                 const char *tag,
                                                 gsize       tag_len,
                                                 gint64     *out_idx);

static inline gboolean
nms_ifcfg_rh_utils_is_numbered_tag(const char *key, const char *tag, gint64 *out_idx)
{
    nm_assert(tag);

    return nms_ifcfg_rh_utils_is_numbered_tag_impl(key, tag, strlen(tag), out_idx);
}

#define NMS_IFCFG_RH_UTIL_IS_NUMBERED_TAG(key, tag, out_idx) \
    nms_ifcfg_rh_utils_is_numbered_tag_impl(key, tag, NM_STRLEN(tag), out_idx)

/*****************************************************************************/

const NMSIfcfgKeyTypeInfo *nms_ifcfg_rh_utils_is_well_known_key(const char *key);

/*****************************************************************************/

extern const char *const _nm_ethtool_ifcfg_names[_NM_ETHTOOL_ID_NUM];

static inline const char *
nms_ifcfg_rh_utils_get_ethtool_name(NMEthtoolID ethtool_id)
{
    nm_assert(ethtool_id >= _NM_ETHTOOL_ID_FIRST && ethtool_id <= _NM_ETHTOOL_ID_LAST);
    nm_assert(ethtool_id < G_N_ELEMENTS(_nm_ethtool_ifcfg_names));
    nm_assert(_nm_ethtool_ifcfg_names[ethtool_id]);

    return _nm_ethtool_ifcfg_names[ethtool_id];
}

const NMEthtoolData *nms_ifcfg_rh_utils_get_ethtool_by_name(const char   *name,
                                                            NMEthtoolType ethtool_type);

#endif /* _UTILS_H_ */