Add HostAP wireless driver.

Includes minor cleanups from Adrian Bunk <bunk@stusta.de>.

drivers/net/wireless/hostap/hostap_crypt.h

@@ -0,0 +1,50 @@
+#ifndef PRISM2_CRYPT_H
+#define PRISM2_CRYPT_H
+
+struct hostap_crypto_ops {
+	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;
+};
+
+
+int hostap_register_crypto_ops(struct hostap_crypto_ops *ops);
+int hostap_unregister_crypto_ops(struct hostap_crypto_ops *ops);
+struct hostap_crypto_ops * hostap_get_crypto_ops(const char *name);
+
+#endif /* PRISM2_CRYPT_H */