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 program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef CTRL_IFACE_H
  16 #define CTRL_IFACE_H
  17
  18 #ifdef CONFIG_CTRL_IFACE
  19
  20 /* Shared functions from ctrl_iface.c; to be called by ctrl_iface backends */
  21
  22 /**
  23  * wpa_supplicant_ctrl_iface_process - Process ctrl_iface command
  24  * @wpa_s: Pointer to wpa_supplicant data
  25  * @buf: Received command buffer (nul terminated string)
  26  * @resp_len: Variable to be set to the response length
  27  * Returns: Response (*resp_len bytes) or %NULL on failure
  28  *
  29  * Control interface backends call this function when receiving a message that
  30  * they do not process internally, i.e., anything else than ATTACH, DETACH,
  31  * and LEVEL. The return response value is then sent to the external program
  32  * that sent the command. Caller is responsible for freeing the buffer after
  33  * this. If %NULL is returned, *resp_len can be set to two special values:
  34  * 1 = send "FAIL\n" response, 2 = send "OK\n" response. If *resp_len has any
  35  * other value, no response is sent.
  36  */
  37 char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
  38                                          char *buf, size_t *resp_len);
  39
  40 /**
  41  * wpa_supplicant_ctrl_iface_process - Process global ctrl_iface command
  42  * @global: Pointer to global data from wpa_supplicant_init()
  43  * @buf: Received command buffer (nul terminated string)
  44  * @resp_len: Variable to be set to the response length
  45  * Returns: Response (*resp_len bytes) or %NULL on failure
  46  *
  47  * Control interface backends call this function when receiving a message from
  48  * the global ctrl_iface connection. The return response value is then sent to
  49  * the external program that sent the command. Caller is responsible for
  50  * freeing the buffer after this. If %NULL is returned, *resp_len can be set to
  51  * two special values: 1 = send "FAIL\n" response, 2 = send "OK\n" response. If
  52  * *resp_len has any other value, no response is sent.
  53  */
  54 char * wpa_supplicant_global_ctrl_iface_process(struct wpa_global *global,
  55                                                 char *buf, size_t *resp_len);
  56
  57
  58 /* Functions that each ctrl_iface backend must implement */
  59
  60 /**
  61  * wpa_supplicant_ctrl_iface_init - Initialize control interface
  62  * @wpa_s: Pointer to wpa_supplicant data
  63  * Returns: Pointer to private data on success, %NULL on failure
  64  *
  65  * Initialize the control interface and start receiving commands from external
  66  * programs.
  67  *
  68  * Required to be implemented in each control interface backend.
  69  */
  70 struct ctrl_iface_priv *
  71 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s);
  72
  73 /**
  74  * wpa_supplicant_ctrl_iface_deinit - Deinitialize control interface
  75  * @priv: Pointer to private data from wpa_supplicant_ctrl_iface_init()
  76  *
  77  * Deinitialize the control interface that was initialized with
  78  * wpa_supplicant_ctrl_iface_init().
  79  *
  80  * Required to be implemented in each control interface backend.
  81  */
  82 void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv);
  83
  84 /**
  85  * wpa_supplicant_ctrl_iface_wait - Wait for ctrl_iface monitor
  86  * @priv: Pointer to private data from wpa_supplicant_ctrl_iface_init()
  87  *
  88  * Wait until the first message from an external program using the control
  89  * interface is received. This function can be used to delay normal startup
  90  * processing to allow control interface programs to attach with
  91  * %wpa_supplicant before normal operations are started.
  92  *
  93  * Required to be implemented in each control interface backend.
  94  */
  95 void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv);
  96
  97 /**
  98  * wpa_supplicant_ctrl_iface_ctrl_rsp_handle - Handle a control response
  99  * @wpa_s: Pointer to wpa_supplicant data
 100  * @ssid: Pointer to the network block the reply is for
 101  * @field: field the response is a reply for
 102  * @value: value (ie, password, etc) for @field
 103  * Returns: 0 on success, non-zero on error
 104  *
 105  * Helper function to handle replies to control interface requests.
 106  */
 107 int wpa_supplicant_ctrl_iface_ctrl_rsp_handle(struct wpa_supplicant *wpa_s,
 108                                               struct wpa_ssid *ssid,
 109                                               const char *field,
 110                                               const char *value);
 111
 112 /**
 113  * wpa_supplicant_global_ctrl_iface_init - Initialize global control interface
 114  * @global: Pointer to global data from wpa_supplicant_init()
 115  * Returns: Pointer to private data on success, %NULL on failure
 116  *
 117  * Initialize the global control interface and start receiving commands from
 118  * external programs.
 119  *
 120  * Required to be implemented in each control interface backend.
 121  */
 122 struct ctrl_iface_global_priv *
 123 wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global);
 124
 125 /**
 126  * wpa_supplicant_global_ctrl_iface_deinit - Deinitialize global ctrl interface
 127  * @priv: Pointer to private data from wpa_supplicant_global_ctrl_iface_init()
 128  *
 129  * Deinitialize the global control interface that was initialized with
 130  * wpa_supplicant_global_ctrl_iface_init().
 131  *
 132  * Required to be implemented in each control interface backend.
 133  */
 134 void wpa_supplicant_global_ctrl_iface_deinit(
 135         struct ctrl_iface_global_priv *priv);
 136
 137 #else /* CONFIG_CTRL_IFACE */
 138
 139 static inline struct ctrl_iface_priv *
 140 wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
 141 {
 142         return (void *) -1;
 143 }
 144
 145 static inline void
 146 wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
 147 {
 148 }
 149
 150 static inline void
 151 wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv, int level,
 152                                char *buf, size_t len)
 153 {
 154 }
 155
 156 static inline void
 157 wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
 158 {
 159 }
 160
 161 static inline struct ctrl_iface_global_priv *
 162 wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
 163 {
 164         return (void *) 1;
 165 }
 166
 167 static inline void
 168 wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
 169 {
 170 }
 171
 172 #endif /* CONFIG_CTRL_IFACE */
 173
 174 #endif /* CTRL_IFACE_H */