/*
 * SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */
//

#ifndef _ESP_NETIF_PPP_H_
#define _ESP_NETIF_PPP_H_

#ifdef __cplusplus
extern "C" {
#endif

/** @brief PPP event base */
ESP_EVENT_DECLARE_BASE(NETIF_PPP_STATUS);

/** @brief Configuration structure for PPP network interface
 *
 */
typedef struct esp_netif_ppp_config {
    bool ppp_phase_event_enabled;  /**< Enables events coming from PPP PHASE change */
    bool ppp_error_event_enabled;  /**< Enables events from main PPP state machine producing errors */
#ifdef CONFIG_LWIP_ENABLE_LCP_ECHO
    bool ppp_lcp_echo_disabled;     /**< Allows to temporarily disable LCP keepalive (runtime, if enabled compile time)
                                     *   When LCP echo is enabled in menuconfig, this option can be used to override the setting,
                                     *   if we have to relax LCP keepalive criteria during runtime operation, for example before OTA update.
                                     *   The current session must be closed, settings will be applied upon connecting.
                                     *   */
#endif // CONFIG_LWIP_ENABLE_LCP_ECHO
#ifdef CONFIG_LWIP_PPP_SERVER_SUPPORT
    uint32_t ppp_our_ip4_addr;   /**< Set our preferred address, typically used when we're the PPP server */
    uint32_t ppp_their_ip4_addr; /**< Set our preferred address, typically used when we're the PPP server */
#endif // CONFIG_LWIP_PPP_SERVER_SUPPORT
} esp_netif_ppp_config_t;

/** @brief event id offset for PHASE related events
 *
 * All PPP related events are produced from esp-netif under `NETIF_PPP_STATUS`, this offset defines
 * helps distinguish between error and phase events
 */
#define NETIF_PP_PHASE_OFFSET (0x100)

/** @brief event id offset for internal errors
 *
 */
#define NETIF_PPP_INTERNAL_ERR_OFFSET (0x200)

/** @brief event ids for different PPP related events
 *
 */
typedef enum {
    NETIF_PPP_ERRORNONE        = 0,  /* No error. */
    NETIF_PPP_ERRORPARAM       = 1,  /* Invalid parameter. */
    NETIF_PPP_ERROROPEN        = 2,  /* Unable to open PPP session. */
    NETIF_PPP_ERRORDEVICE      = 3,  /* Invalid I/O device for PPP. */
    NETIF_PPP_ERRORALLOC       = 4,  /* Unable to allocate resources. */
    NETIF_PPP_ERRORUSER        = 5,  /* User interrupt. */
    NETIF_PPP_ERRORCONNECT     = 6,  /* Connection lost. */
    NETIF_PPP_ERRORAUTHFAIL    = 7,  /* Failed authentication challenge. */
    NETIF_PPP_ERRORPROTOCOL    = 8,  /* Failed to meet protocol. */
    NETIF_PPP_ERRORPEERDEAD    = 9,  /* Connection timeout */
    NETIF_PPP_ERRORIDLETIMEOUT = 10, /* Idle Timeout */
    NETIF_PPP_ERRORCONNECTTIME = 11, /* Max connect time reached */
    NETIF_PPP_ERRORLOOPBACK    = 12, /* Loopback detected */
    NETIF_PPP_PHASE_DEAD         = NETIF_PP_PHASE_OFFSET +  0,
    NETIF_PPP_PHASE_MASTER       = NETIF_PP_PHASE_OFFSET +  1,
    NETIF_PPP_PHASE_HOLDOFF      = NETIF_PP_PHASE_OFFSET +  2,
    NETIF_PPP_PHASE_INITIALIZE   = NETIF_PP_PHASE_OFFSET +  3,
    NETIF_PPP_PHASE_SERIALCONN   = NETIF_PP_PHASE_OFFSET +  4,
    NETIF_PPP_PHASE_DORMANT      = NETIF_PP_PHASE_OFFSET +  5,
    NETIF_PPP_PHASE_ESTABLISH    = NETIF_PP_PHASE_OFFSET +  6,
    NETIF_PPP_PHASE_AUTHENTICATE = NETIF_PP_PHASE_OFFSET +  7,
    NETIF_PPP_PHASE_CALLBACK     = NETIF_PP_PHASE_OFFSET +  8,
    NETIF_PPP_PHASE_NETWORK      = NETIF_PP_PHASE_OFFSET +  9,
    NETIF_PPP_PHASE_RUNNING      = NETIF_PP_PHASE_OFFSET +  10,
    NETIF_PPP_PHASE_TERMINATE    = NETIF_PP_PHASE_OFFSET +  11,
    NETIF_PPP_PHASE_DISCONNECT   = NETIF_PP_PHASE_OFFSET +  12,
    NETIF_PPP_CONNECT_FAILED     = NETIF_PPP_INTERNAL_ERR_OFFSET + 0,
} esp_netif_ppp_status_event_t;

/** @brief definitions of different authorisation types
 *
 */
typedef enum {
    NETIF_PPP_AUTHTYPE_NONE =      0x00,
    NETIF_PPP_AUTHTYPE_PAP =       0x01,
    NETIF_PPP_AUTHTYPE_CHAP =      0x02,
    NETIF_PPP_AUTHTYPE_MSCHAP =    0x04,
    NETIF_PPP_AUTHTYPE_MSCHAP_V2 = 0x08,
    NETIF_PPP_AUTHTYPE_EAP =       0x10,
} esp_netif_auth_type_t;

/** @brief Sets the auth parameters for the supplied esp-netif.
 *
 * @param[in]  esp_netif Handle to esp-netif instance
 * @param[in]  authtype Authorisation type
 * @param[in]  user User name
 * @param[in]  passwd Password
 *
 * @return     ESP_OK on success,
 *             ESP_ERR_ESP_NETIF_INVALID_PARAMS if the supplied netif is not of PPP type, or netif is null
 */
esp_err_t esp_netif_ppp_set_auth(esp_netif_t *netif, esp_netif_auth_type_t authtype, const char *user, const char *passwd);

/** @brief Sets common parameters for the supplied esp-netif.
 *
 * @param[in]  esp_netif Handle to esp-netif instance
 * @param[in]  config Pointer to PPP netif configuration structure
 *
 * @return     ESP_OK on success,
 *             ESP_ERR_ESP_NETIF_INVALID_PARAMS if the supplied netif is not of PPP type, or netif is null
 */
esp_err_t esp_netif_ppp_set_params(esp_netif_t *netif, const esp_netif_ppp_config_t *config);

/** @brief Gets parameters configured in the supplied esp-netif.
 *
 * @param[in]  esp_netif Handle to esp-netif instance
 * @param[out]  config Pointer to PPP netif configuration structure
 *
 * @return     ESP_OK on success,
 *             ESP_ERR_ESP_NETIF_INVALID_PARAMS if the supplied netif is not of PPP type, or netif is null
 */
esp_err_t esp_netif_ppp_get_params(esp_netif_t *netif, esp_netif_ppp_config_t *config);

#ifdef __cplusplus
}
#endif

#endif //_ESP_NETIF_PPP_H_