wpa_supplicant/ctrl_iface.h

   1 /*
   2  * WPA Supplicant / UNIX domain socket -based control interface
   3  * Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #ifndef CTRL_IFACE_H
  10 #define CTRL_IFACE_H
  11
  12 #ifdef CONFIG_CTRL_IFACE
  13
  14 /* Shared functions from ctrl_iface.c; to be called by ctrl_iface backends */
  15
  16 /**
  17  * wpa_supplicant_ctrl_iface_process - Process ctrl_iface command
  18  * @wpa_s: Pointer to wpa_supplicant data
  19  * @buf: Received command buffer (nul terminated string)
  20  * @resp_len: Variable to be set to the response length
  21  * Returns: Response (*resp_len bytes) or %NULL on failure
  22  *
  23  * Control interface backends call this function when receiving a message that
  24  * they do not process internally, i.e., anything else than ATTACH, DETACH,
  25  * and LEVEL. The return response value is then sent to the external program
  26  * that sent the command. Caller is responsible for freeing the buffer after
  27  * this. If %NULL is returned, *resp_len can be set to two special values:
  28  * 1 = send "FAIL\n" response, 2 = send "OK\n" response. If *resp_len has any
  29  * other value, no response is sent.
  30  */
  31 char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
  32                                          char *buf, size_t *resp_len);
  33
  34 /**
  35  * wpa_supplicant_ctrl_iface_process - Process global ctrl_iface command
  36  * @global: Pointer to global data from wpa_supplicant_init()
  37  * @buf: Received command buffer (nul terminated string)
  38  * @resp_len: Variable to be set to the response length
  39  * Returns: Response (*resp_len bytes) or %NULL on failure
  40  *
  41  * Control interface backends call this function when receiving a message from
  42  * the global ctrl_iface connection. The return response value is then sent to
  43  * the external program that sent the command. Caller is responsible for
  44  * freeing the buffer after this. If %NULL is returned, *resp_len can be set to
  45  * two special values: 1 = send "FAIL\n" response, 2 = send "OK\n" response. If
  46  * *resp_len has any other value, no response is sent.
  47  */
  48 char * wpa_supplicant_global_ctrl_iface_process(struct wpa_global *global,
  49                                                 char *buf, size_t *resp_len);
  50
  51
  52 /* Functions that each ctrl_iface backend must implement */
  53
  54 /**
  55  * wpa_supplicant_ctrl_iface_init - Initialize control interface
  56  * @wpa_s: Pointer to wpa_supplicant data
  57  * Returns: Pointer to private data on success, %NULL on failure
  58  *
  59  * Initialize the control interface and start receiving commands from external
  60  * programs.
  61  *
  62  * Required to be implemented in each control interface backend.
  63  */
  64 struct ctrl_iface_priv *
  65 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s);
  66
  67 /**
  68  * wpa_supplicant_ctrl_iface_deinit - Deinitialize control interface
  69  * @priv: Pointer to private data from wpa_supplicant_ctrl_iface_init()
  70  *
  71  * Deinitialize the control interface that was initialized with
  72  * wpa_supplicant_ctrl_iface_init().
  73  *
  74  * Required to be implemented in each control interface backend.
  75  */
  76 void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv);
  77
  78 /**
  79  * wpa_supplicant_ctrl_iface_wait - Wait for ctrl_iface monitor
  80  * @priv: Pointer to private data from wpa_supplicant_ctrl_iface_init()
  81  *
  82  * Wait until the first message from an external program using the control
  83  * interface is received. This function can be used to delay normal startup
  84  * processing to allow control interface programs to attach with
  85  * %wpa_supplicant before normal operations are started.
  86  *
  87  * Required to be implemented in each control interface backend.
  88  */
  89 void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv);
  90
  91 /**
  92  * wpa_supplicant_global_ctrl_iface_init - Initialize global control interface
  93  * @global: Pointer to global data from wpa_supplicant_init()
  94  * Returns: Pointer to private data on success, %NULL on failure
  95  *
  96  * Initialize the global control interface and start receiving commands from
  97  * external programs.
  98  *
  99  * Required to be implemented in each control interface backend.
 100  */
 101 struct ctrl_iface_global_priv *
 102 wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global);
 103
 104 /**
 105  * wpa_supplicant_global_ctrl_iface_deinit - Deinitialize global ctrl interface
 106  * @priv: Pointer to private data from wpa_supplicant_global_ctrl_iface_init()
 107  *
 108  * Deinitialize the global control interface that was initialized with
 109  * wpa_supplicant_global_ctrl_iface_init().
 110  *
 111  * Required to be implemented in each control interface backend.
 112  */
 113 void wpa_supplicant_global_ctrl_iface_deinit(
 114         struct ctrl_iface_global_priv *priv);
 115
 116 #else /* CONFIG_CTRL_IFACE */
 117
 118 static inline struct ctrl_iface_priv *
 119 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
 120 {
 121         return (void *) -1;
 122 }
 123
 124 static inline void
 125 wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
 126 {
 127 }
 128
 129 static inline void
 130 wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv, int level,
 131                                char *buf, size_t len)
 132 {
 133 }
 134
 135 static inline void
 136 wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
 137 {
 138 }
 139
 140 static inline struct ctrl_iface_global_priv *
 141 wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
 142 {
 143         return (void *) 1;
 144 }
 145
 146 static inline void
 147 wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
 148 {
 149 }
 150
 151 #endif /* CONFIG_CTRL_IFACE */
 152
 153 #endif /* CTRL_IFACE_H */