debugfs_key.c
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00001 /*
00002  * Copyright 2003-2005  Devicescape Software, Inc.
00003  * Copyright (c) 2006   Jiri Benc <jbenc@suse.cz>
00004  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License version 2 as
00008  * published by the Free Software Foundation.
00009  */
00010 
00011 #include <linux/kobject.h>
00012 #include <linux/slab.h>
00013 #include "ieee80211_i.h"
00014 #include "key.h"
00015 #include "debugfs.h"
00016 #include "debugfs_key.h"
00017 
00018 #define KEY_READ(name, prop, format_string)                             \
00019 static ssize_t key_##name##_read(struct file *file,                     \
00020                                  char __user *userbuf,                  \
00021                                  size_t count, loff_t *ppos)            \
00022 {                                                                       \
00023         struct ieee80211_key *key = file->private_data;                 \
00024         return mac80211_format_buffer(userbuf, count, ppos,             \
00025                                       format_string, key->prop);        \
00026 }
00027 #define KEY_READ_D(name) KEY_READ(name, name, "%d\n")
00028 #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
00029 
00030 #define KEY_OPS(name)                                                   \
00031 static const struct file_operations key_ ##name## _ops = {              \
00032         .read = key_##name##_read,                                      \
00033         .open = simple_open,                                            \
00034         .llseek = generic_file_llseek,                                  \
00035 }
00036 
00037 #define KEY_FILE(name, format)                                          \
00038                  KEY_READ_##format(name)                                \
00039                  KEY_OPS(name)
00040 
00041 #define KEY_CONF_READ(name, format_string)                              \
00042         KEY_READ(conf_##name, conf.name, format_string)
00043 #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n")
00044 
00045 #define KEY_CONF_OPS(name)                                              \
00046 static const struct file_operations key_ ##name## _ops = {              \
00047         .read = key_conf_##name##_read,                                 \
00048         .open = simple_open,                                            \
00049         .llseek = generic_file_llseek,                                  \
00050 }
00051 
00052 #define KEY_CONF_FILE(name, format)                                     \
00053                  KEY_CONF_READ_##format(name)                           \
00054                  KEY_CONF_OPS(name)
00055 
00056 KEY_CONF_FILE(keylen, D);
00057 KEY_CONF_FILE(keyidx, D);
00058 KEY_CONF_FILE(hw_key_idx, D);
00059 KEY_FILE(flags, X);
00060 KEY_FILE(tx_rx_count, D);
00061 KEY_READ(ifindex, sdata->name, "%s\n");
00062 KEY_OPS(ifindex);
00063 
00064 static ssize_t key_algorithm_read(struct file *file,
00065                                   char __user *userbuf,
00066                                   size_t count, loff_t *ppos)
00067 {
00068         char buf[15];
00069         struct ieee80211_key *key = file->private_data;
00070         u32 c = key->conf.cipher;
00071 
00072         sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
00073                 c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
00074         return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
00075 }
00076 KEY_OPS(algorithm);
00077 
00078 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
00079                                 size_t count, loff_t *ppos)
00080 {
00081         u64 pn;
00082         char buf[20];
00083         int len;
00084         struct ieee80211_key *key = file->private_data;
00085 
00086         switch (key->conf.cipher) {
00087         case WLAN_CIPHER_SUITE_WEP40:
00088         case WLAN_CIPHER_SUITE_WEP104:
00089                 len = scnprintf(buf, sizeof(buf), "\n");
00090                 break;
00091         case WLAN_CIPHER_SUITE_TKIP:
00092                 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
00093                                 key->u.tkip.tx.iv32,
00094                                 key->u.tkip.tx.iv16);
00095                 break;
00096         case WLAN_CIPHER_SUITE_CCMP:
00097                 pn = atomic64_read(&key->u.ccmp.tx_pn);
00098                 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
00099                                 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
00100                                 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
00101                 break;
00102         case WLAN_CIPHER_SUITE_AES_CMAC:
00103                 pn = atomic64_read(&key->u.aes_cmac.tx_pn);
00104                 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
00105                                 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
00106                                 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
00107                 break;
00108         default:
00109                 return 0;
00110         }
00111         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
00112 }
00113 KEY_OPS(tx_spec);
00114 
00115 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
00116                                 size_t count, loff_t *ppos)
00117 {
00118         struct ieee80211_key *key = file->private_data;
00119         char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
00120         int i, len;
00121         const u8 *rpn;
00122 
00123         switch (key->conf.cipher) {
00124         case WLAN_CIPHER_SUITE_WEP40:
00125         case WLAN_CIPHER_SUITE_WEP104:
00126                 len = scnprintf(buf, sizeof(buf), "\n");
00127                 break;
00128         case WLAN_CIPHER_SUITE_TKIP:
00129                 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
00130                         p += scnprintf(p, sizeof(buf)+buf-p,
00131                                        "%08x %04x\n",
00132                                        key->u.tkip.rx[i].iv32,
00133                                        key->u.tkip.rx[i].iv16);
00134                 len = p - buf;
00135                 break;
00136         case WLAN_CIPHER_SUITE_CCMP:
00137                 for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) {
00138                         rpn = key->u.ccmp.rx_pn[i];
00139                         p += scnprintf(p, sizeof(buf)+buf-p,
00140                                        "%02x%02x%02x%02x%02x%02x\n",
00141                                        rpn[0], rpn[1], rpn[2],
00142                                        rpn[3], rpn[4], rpn[5]);
00143                 }
00144                 len = p - buf;
00145                 break;
00146         case WLAN_CIPHER_SUITE_AES_CMAC:
00147                 rpn = key->u.aes_cmac.rx_pn;
00148                 p += scnprintf(p, sizeof(buf)+buf-p,
00149                                "%02x%02x%02x%02x%02x%02x\n",
00150                                rpn[0], rpn[1], rpn[2],
00151                                rpn[3], rpn[4], rpn[5]);
00152                 len = p - buf;
00153                 break;
00154         default:
00155                 return 0;
00156         }
00157         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
00158 }
00159 KEY_OPS(rx_spec);
00160 
00161 static ssize_t key_replays_read(struct file *file, char __user *userbuf,
00162                                 size_t count, loff_t *ppos)
00163 {
00164         struct ieee80211_key *key = file->private_data;
00165         char buf[20];
00166         int len;
00167 
00168         switch (key->conf.cipher) {
00169         case WLAN_CIPHER_SUITE_CCMP:
00170                 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
00171                 break;
00172         case WLAN_CIPHER_SUITE_AES_CMAC:
00173                 len = scnprintf(buf, sizeof(buf), "%u\n",
00174                                 key->u.aes_cmac.replays);
00175                 break;
00176         default:
00177                 return 0;
00178         }
00179         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
00180 }
00181 KEY_OPS(replays);
00182 
00183 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
00184                                   size_t count, loff_t *ppos)
00185 {
00186         struct ieee80211_key *key = file->private_data;
00187         char buf[20];
00188         int len;
00189 
00190         switch (key->conf.cipher) {
00191         case WLAN_CIPHER_SUITE_AES_CMAC:
00192                 len = scnprintf(buf, sizeof(buf), "%u\n",
00193                                 key->u.aes_cmac.icverrors);
00194                 break;
00195         default:
00196                 return 0;
00197         }
00198         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
00199 }
00200 KEY_OPS(icverrors);
00201 
00202 static ssize_t key_key_read(struct file *file, char __user *userbuf,
00203                             size_t count, loff_t *ppos)
00204 {
00205         struct ieee80211_key *key = file->private_data;
00206         int i, bufsize = 2 * key->conf.keylen + 2;
00207         char *buf = kmalloc(bufsize, GFP_KERNEL);
00208         char *p = buf;
00209         ssize_t res;
00210 
00211         if (!buf)
00212                 return -ENOMEM;
00213 
00214         for (i = 0; i < key->conf.keylen; i++)
00215                 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
00216         p += scnprintf(p, bufsize+buf-p, "\n");
00217         res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
00218         kfree(buf);
00219         return res;
00220 }
00221 KEY_OPS(key);
00222 
00223 #define DEBUGFS_ADD(name) \
00224         debugfs_create_file(#name, 0400, key->debugfs.dir, \
00225                             key, &key_##name##_ops);
00226 
00227 void ieee80211_debugfs_key_add(struct ieee80211_key *key)
00228 {
00229         static int keycount;
00230         char buf[100];
00231         struct sta_info *sta;
00232 
00233         if (!key->local->debugfs.keys)
00234                 return;
00235 
00236         sprintf(buf, "%d", keycount);
00237         key->debugfs.cnt = keycount;
00238         keycount++;
00239         key->debugfs.dir = debugfs_create_dir(buf,
00240                                         key->local->debugfs.keys);
00241 
00242         if (!key->debugfs.dir)
00243                 return;
00244 
00245         sta = key->sta;
00246         if (sta) {
00247                 sprintf(buf, "../../netdev:%s/stations/%pM",
00248                         sta->sdata->name, sta->sta.addr);
00249                 key->debugfs.stalink =
00250                         debugfs_create_symlink("station", key->debugfs.dir, buf);
00251         }
00252 
00253         DEBUGFS_ADD(keylen);
00254         DEBUGFS_ADD(flags);
00255         DEBUGFS_ADD(keyidx);
00256         DEBUGFS_ADD(hw_key_idx);
00257         DEBUGFS_ADD(tx_rx_count);
00258         DEBUGFS_ADD(algorithm);
00259         DEBUGFS_ADD(tx_spec);
00260         DEBUGFS_ADD(rx_spec);
00261         DEBUGFS_ADD(replays);
00262         DEBUGFS_ADD(icverrors);
00263         DEBUGFS_ADD(key);
00264         DEBUGFS_ADD(ifindex);
00265 };
00266 
00267 void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
00268 {
00269         if (!key)
00270                 return;
00271 
00272         debugfs_remove_recursive(key->debugfs.dir);
00273         key->debugfs.dir = NULL;
00274 }
00275 
00276 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
00277 {
00278         char buf[50];
00279         struct ieee80211_key *key;
00280 
00281         if (!sdata->debugfs.dir)
00282                 return;
00283 
00284         lockdep_assert_held(&sdata->local->key_mtx);
00285 
00286         if (sdata->default_unicast_key) {
00287                 key = key_mtx_dereference(sdata->local,
00288                                           sdata->default_unicast_key);
00289                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
00290                 sdata->debugfs.default_unicast_key =
00291                         debugfs_create_symlink("default_unicast_key",
00292                                                sdata->debugfs.dir, buf);
00293         } else {
00294                 debugfs_remove(sdata->debugfs.default_unicast_key);
00295                 sdata->debugfs.default_unicast_key = NULL;
00296         }
00297 
00298         if (sdata->default_multicast_key) {
00299                 key = key_mtx_dereference(sdata->local,
00300                                           sdata->default_multicast_key);
00301                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
00302                 sdata->debugfs.default_multicast_key =
00303                         debugfs_create_symlink("default_multicast_key",
00304                                                sdata->debugfs.dir, buf);
00305         } else {
00306                 debugfs_remove(sdata->debugfs.default_multicast_key);
00307                 sdata->debugfs.default_multicast_key = NULL;
00308         }
00309 }
00310 
00311 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
00312 {
00313         char buf[50];
00314         struct ieee80211_key *key;
00315 
00316         if (!sdata->debugfs.dir)
00317                 return;
00318 
00319         key = key_mtx_dereference(sdata->local,
00320                                   sdata->default_mgmt_key);
00321         if (key) {
00322                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
00323                 sdata->debugfs.default_mgmt_key =
00324                         debugfs_create_symlink("default_mgmt_key",
00325                                                sdata->debugfs.dir, buf);
00326         } else
00327                 ieee80211_debugfs_key_remove_mgmt_default(sdata);
00328 }
00329 
00330 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
00331 {
00332         if (!sdata)
00333                 return;
00334 
00335         debugfs_remove(sdata->debugfs.default_mgmt_key);
00336         sdata->debugfs.default_mgmt_key = NULL;
00337 }
00338 
00339 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
00340                                    struct sta_info *sta)
00341 {
00342         debugfs_remove(key->debugfs.stalink);
00343         key->debugfs.stalink = NULL;
00344 }


ros_rt_wmp
Author(s): Danilo Tardioli, dantard@unizar.es
autogenerated on Fri Jan 3 2014 12:07:54