FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/ktls.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2021 Netflix Inc.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #ifndef __OPENCRYPTO_KTLS_H__
    #define __OPENCRYPTO_KTLS_H__
    
    #define MAX_TLS_PAGES   (1 + btoc(TLS_MAX_MSG_SIZE_V10_2))
    
    struct ktls_ocf_encrypt_state {
            struct socket *so;
            struct mbuf *m;
            void *cbuf;
            struct iovec dst_iov[MAX_TLS_PAGES + 2];
            vm_paddr_t parray[MAX_TLS_PAGES + 1];
    
            struct cryptop crp;
            struct uio uio;
            union {
                    struct tls_mac_data mac;
                    struct tls_aead_data aead;
                    struct tls_aead_data_13 aead13;
            };
    };
    
    void ktls_encrypt_cb(struct ktls_ocf_encrypt_state *state, int error);
    void ktls_ocf_free(struct ktls_session *tls);
    int ktls_ocf_try(struct socket *so, struct ktls_session *tls, int direction);
    int ktls_ocf_encrypt(struct ktls_ocf_encrypt_state *state,
        struct ktls_session *tls, struct mbuf *m, struct iovec *outiov,
        int outiovcnt);
    int ktls_ocf_decrypt(struct ktls_session *tls,
        const struct tls_record_layer *hdr, struct mbuf *m, uint64_t seqno,
        int *trailer_len);
    int ktls_ocf_recrypt(struct ktls_session *tls,
        const struct tls_record_layer *hdr, struct mbuf *m, uint64_t seqno);
    bool ktls_ocf_recrypt_supported(struct ktls_session *tls);
    
    #endif  /* !__OPENCRYPTO_KTLS_H__ */

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