1/* 2 * Copyright 2003-2005 Devicescape Software, Inc. 3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/kobject.h> 12#include "ieee80211_i.h" 13#include "ieee80211_key.h" 14#include "debugfs.h" 15#include "debugfs_key.h" 16 17#define KEY_READ(name, buflen, format_string) \ 18static ssize_t key_##name##_read(struct file *file, \ 19 char __user *userbuf, \ 20 size_t count, loff_t *ppos) \ 21{ \ 22 char buf[buflen]; \ 23 struct ieee80211_key *key = file->private_data; \ 24 int res = scnprintf(buf, buflen, format_string, key->name); \ 25 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ 26} 27#define KEY_READ_D(name) KEY_READ(name, 20, "%d\n") 28 29#define KEY_OPS(name) \ 30static const struct file_operations key_ ##name## _ops = { \ 31 .read = key_##name##_read, \ 32 .open = mac80211_open_file_generic, \ 33} 34 35#define KEY_FILE(name, format) \ 36 KEY_READ_##format(name) \ 37 KEY_OPS(name) 38 39KEY_FILE(keylen, D); 40KEY_FILE(force_sw_encrypt, D); 41KEY_FILE(keyidx, D); 42KEY_FILE(hw_key_idx, D); 43KEY_FILE(tx_rx_count, D); 44 45static ssize_t key_algorithm_read(struct file *file, 46 char __user *userbuf, 47 size_t count, loff_t *ppos) 48{ 49 char *alg; 50 struct ieee80211_key *key = file->private_data; 51 52 switch (key->alg) { 53 case ALG_WEP: 54 alg = "WEP\n"; 55 break; 56 case ALG_TKIP: 57 alg = "TKIP\n"; 58 break; 59 case ALG_CCMP: 60 alg = "CCMP\n"; 61 break; 62 default: 63 return 0; 64 } 65 return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg)); 66} 67KEY_OPS(algorithm); 68 69static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, 70 size_t count, loff_t *ppos) 71{ 72 const u8 *tpn; 73 char buf[20]; 74 int len; 75 struct ieee80211_key *key = file->private_data; 76 77 switch (key->alg) { 78 case ALG_WEP: 79 len = scnprintf(buf, sizeof(buf), "\n"); 80 case ALG_TKIP: 81 len = scnprintf(buf, sizeof(buf), "%08x %04x\n", 82 key->u.tkip.iv32, 83 key->u.tkip.iv16); 84 case ALG_CCMP: 85 tpn = key->u.ccmp.tx_pn; 86 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 87 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); 88 default: 89 return 0; 90 } 91 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 92} 93KEY_OPS(tx_spec); 94 95static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, 96 size_t count, loff_t *ppos) 97{ 98 struct ieee80211_key *key = file->private_data; 99 char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; 100 int i, len; 101 const u8 *rpn; 102 103 switch (key->alg) { 104 case ALG_WEP: 105 len = scnprintf(buf, sizeof(buf), "\n"); 106 case ALG_TKIP: 107 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 108 p += scnprintf(p, sizeof(buf)+buf-p, 109 "%08x %04x\n", 110 key->u.tkip.iv32_rx[i], 111 key->u.tkip.iv16_rx[i]); 112 len = p - buf; 113 case ALG_CCMP: 114 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { 115 rpn = key->u.ccmp.rx_pn[i]; 116 p += scnprintf(p, sizeof(buf)+buf-p, 117 "%02x%02x%02x%02x%02x%02x\n", 118 rpn[0], rpn[1], rpn[2], 119 rpn[3], rpn[4], rpn[5]); 120 } 121 len = p - buf; 122 default: 123 return 0; 124 } 125 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 126} 127KEY_OPS(rx_spec); 128 129static ssize_t key_replays_read(struct file *file, char __user *userbuf, 130 size_t count, loff_t *ppos) 131{ 132 struct ieee80211_key *key = file->private_data; 133 char buf[20]; 134 int len; 135 136 if (key->alg != ALG_CCMP) 137 return 0; 138 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); 139 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 140} 141KEY_OPS(replays); 142 143static ssize_t key_key_read(struct file *file, char __user *userbuf, 144 size_t count, loff_t *ppos) 145{ 146 struct ieee80211_key *key = file->private_data; 147 int i, res, bufsize = 2*key->keylen+2; 148 char *buf = kmalloc(bufsize, GFP_KERNEL); 149 char *p = buf; 150 151 for (i = 0; i < key->keylen; i++) 152 p += scnprintf(p, bufsize+buf-p, "%02x", key->key[i]); 153 p += scnprintf(p, bufsize+buf-p, "\n"); 154 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 155 kfree(buf); 156 return res; 157} 158KEY_OPS(key); 159 160#define DEBUGFS_ADD(name) \ 161 key->debugfs.name = debugfs_create_file(#name, 0400,\ 162 key->debugfs.dir, key, &key_##name##_ops); 163 164void ieee80211_debugfs_key_add(struct ieee80211_local *local, 165 struct ieee80211_key *key) 166{ 167 char buf[20]; 168 169 if (!local->debugfs.keys) 170 return; 171 172 sprintf(buf, "%d", key->keyidx); 173 key->debugfs.dir = debugfs_create_dir(buf, 174 local->debugfs.keys); 175 176 if (!key->debugfs.dir) 177 return; 178 179 DEBUGFS_ADD(keylen); 180 DEBUGFS_ADD(force_sw_encrypt); 181 DEBUGFS_ADD(keyidx); 182 DEBUGFS_ADD(hw_key_idx); 183 DEBUGFS_ADD(tx_rx_count); 184 DEBUGFS_ADD(algorithm); 185 DEBUGFS_ADD(tx_spec); 186 DEBUGFS_ADD(rx_spec); 187 DEBUGFS_ADD(replays); 188 DEBUGFS_ADD(key); 189}; 190 191#define DEBUGFS_DEL(name) \ 192 debugfs_remove(key->debugfs.name); key->debugfs.name = NULL; 193 194void ieee80211_debugfs_key_remove(struct ieee80211_key *key) 195{ 196 if (!key) 197 return; 198 199 DEBUGFS_DEL(keylen); 200 DEBUGFS_DEL(force_sw_encrypt); 201 DEBUGFS_DEL(keyidx); 202 DEBUGFS_DEL(hw_key_idx); 203 DEBUGFS_DEL(tx_rx_count); 204 DEBUGFS_DEL(algorithm); 205 DEBUGFS_DEL(tx_spec); 206 DEBUGFS_DEL(rx_spec); 207 DEBUGFS_DEL(replays); 208 DEBUGFS_DEL(key); 209 210 debugfs_remove(key->debugfs.stalink); 211 key->debugfs.stalink = NULL; 212 debugfs_remove(key->debugfs.dir); 213 key->debugfs.dir = NULL; 214} 215void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata) 216{ 217 char buf[50]; 218 219 if (!sdata->debugfsdir) 220 return; 221 222 sprintf(buf, "../keys/%d", sdata->default_key->keyidx); 223 sdata->debugfs.default_key = 224 debugfs_create_symlink("default_key", sdata->debugfsdir, buf); 225} 226void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata) 227{ 228 if (!sdata) 229 return; 230 231 debugfs_remove(sdata->debugfs.default_key); 232 sdata->debugfs.default_key = NULL; 233} 234void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key, 235 struct sta_info *sta) 236{ 237 char buf[50]; 238 239 if (!key->debugfs.dir) 240 return; 241 242 sprintf(buf, "../sta/" MAC_FMT, MAC_ARG(sta->addr)); 243 key->debugfs.stalink = 244 debugfs_create_symlink("station", key->debugfs.dir, buf); 245} 246 247void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 248 struct sta_info *sta) 249{ 250 debugfs_remove(key->debugfs.stalink); 251 key->debugfs.stalink = NULL; 252} 253