intel-linux-sgx/SampleCode/SampleAttestedTLS/sgx_socket/trusted_sgx_socket.cpp

/*
 * Copyright (C) 2011-2021 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * 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.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
 * OWNER 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.
 *
 */


#ifdef M_TLS_SERVER
#include "tls_server_t.h"
#else
#include "tls_client_t.h"
#endif



#include "sgx_trts.h"

/* support socket APIs inside enclave */

/* for socket APIs, refer to https://en.wikipedia.org/wiki/Berkeley_sockets */

int socket(int domain, int type, int protocol)
{
    int ret = -1;

    if (u_socket(&ret, domain, type, protocol) == SGX_SUCCESS) 
        return ret;

    return -1;
}

int connect (int sockfd, const struct sockaddr *servaddr, socklen_t addrlen)
{
    int ret = -1;
	
    if (u_connect(&ret, sockfd, servaddr, addrlen) == SGX_SUCCESS)
        return ret;

    return -1;
}

int bind(int sockfd, const struct sockaddr* servaddr, socklen_t addrlen)
{
    int ret = -1;

    if (u_bind(&ret, sockfd, servaddr, addrlen) == SGX_SUCCESS)
        return ret;

    return -1;
}

int listen(int sockfd, int backlog)
{
    int ret = -1;

    if (u_listen(&ret, sockfd, backlog) == SGX_SUCCESS)
        return ret;

    return -1;
}


int accept(int sockfd, struct sockaddr* addr, socklen_t *addrlen)
{
    int ret = -1;
    socklen_t addrlen_in = 0;

    if ((addr && !addrlen) || (addrlen && !addr)) 
    {
        return -1;
    }

    if (addr && addrlen)
    {
        addrlen_in = *addrlen;
    }

    if (u_accept(&ret, sockfd, addr, addrlen_in, addrlen) == SGX_SUCCESS)
        return ret;

    return -1;
}

ssize_t send(int sockfd, const void *buf, size_t nbytes, int flags)
{
    ssize_t ret = 0; 

    if (u_send(&ret, sockfd, buf, nbytes, flags) == SGX_SUCCESS)
        return ret;

    return -1;
}

ssize_t recv(int fd, void *buf, size_t len, int flags)
{
    ssize_t ret = 0;

    if (u_recv(&ret, fd, buf, len, flags) == SGX_SUCCESS)
        return ret;
	
    return -1;
}

int setsockopt(
			int fd, 
			int level, 
			int optname, 
			const void *optval, 
			socklen_t optlen
			)
{
    int ret = -1;

    //errno = 0;

    if (!optval || !optlen)
    {
     //   errno = EINVAL;
        return -1;
    }

    if (u_setsockopt(&ret, fd, level, optname, optval, optlen) != SGX_SUCCESS) {
      //  errno = EINVAL;
        return -1;
    }

    return ret;
}

int close(int sockfd)
{
    int ret = -1;
    if (u_close(&ret, sockfd) == SGX_SUCCESS)
        return ret;

    return -1;
}