[NET] ieee80211 subsystem

Contributors:
Host AP contributors
James Ketrenos <jketreno@linux.intel.com>
Francois Romieu <romieu@fr.zoreil.com>
Adrian Bunk <bunk@stusta.de>
Matthew Galgoci <mgalgoci@parcelfarce.linux.th
eplanet.co.uk>

1 files changed, 86 insertions, 0 deletions

diff --git a/include/net/ieee80211_crypt.h b/include/net/ieee80211_crypt.h
new file mode 100644
index 000000000000..b58a3bcc0dc0
--- /dev/null
+++ b/include/net/ieee80211_crypt.h
@@ -0,0 +1,86 @@
+/*
+ * Original code based on Host AP (software wireless LAN access point) driver
+ * for Intersil Prism2/2.5/3.
+ *
+ * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
+ * <jkmaline@cc.hut.fi>
+ * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * Adaption to a generic IEEE 802.11 stack by James Ketrenos
+ * <jketreno@linux.intel.com>
+ *
+ * Copyright (c) 2004, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. See README and COPYING for
+ * more details.
+ */
+
+/*
+ * This file defines the interface to the ieee80211 crypto module.
+ */
+#ifndef IEEE80211_CRYPT_H
+#define IEEE80211_CRYPT_H
+
+#include <linux/skbuff.h>
+
+struct ieee80211_crypto_ops {
+        const char *name;
+
+        /* init new crypto context (e.g., allocate private data space,
+         * select IV, etc.); returns NULL on failure or pointer to allocated
+         * private data on success */
+        void * (*init)(int keyidx);
+
+        /* deinitialize crypto context and free allocated private data */
+        void (*deinit)(void *priv);
+
+        /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
+         * value from decrypt_mpdu is passed as the keyidx value for
+         * decrypt_msdu. skb must have enough head and tail room for the
+         * encryption; if not, error will be returned; these functions are
+         * called for all MPDUs (i.e., fragments).
+         */
+        int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
+        int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
+
+        /* These functions are called for full MSDUs, i.e. full frames.
+         * These can be NULL if full MSDU operations are not needed. */
+        int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
+        int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
+                            void *priv);
+
+        int (*set_key)(void *key, int len, u8 *seq, void *priv);
+        int (*get_key)(void *key, int len, u8 *seq, void *priv);
+
+        /* procfs handler for printing out key information and possible
+         * statistics */
+        char * (*print_stats)(char *p, void *priv);
+
+        /* maximum number of bytes added by encryption; encrypt buf is
+         * allocated with extra_prefix_len bytes, copy of in_buf, and
+         * extra_postfix_len; encrypt need not use all this space, but
+         * the result must start at the beginning of the buffer and correct
+         * length must be returned */
+        int extra_prefix_len, extra_postfix_len;
+
+        struct module *owner;
+};
+
+struct ieee80211_crypt_data {
+        struct list_head list; /* delayed deletion list */
+        struct ieee80211_crypto_ops *ops;
+        void *priv;
+        atomic_t refcnt;
+};
+
+int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
+int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
+struct ieee80211_crypto_ops * ieee80211_get_crypto_ops(const char *name);
+void ieee80211_crypt_deinit_entries(struct ieee80211_device *, int);
+void ieee80211_crypt_deinit_handler(unsigned long);
+void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
+                                    struct ieee80211_crypt_data **crypt);
+
+#endif