FreeBSD/Linux Kernel Cross Reference
sys/compat/cloudabi64/cloudabi64_sock.c

     /*-
      * Copyright (c) 2015-2017 Nuxi, https://nuxi.nl/
      *
      * 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 AUTHOR 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 AUTHOR 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/systm.h>
    #include <sys/uio.h>
    
    #include <contrib/cloudabi/cloudabi64_types.h>
    
    #include <compat/cloudabi/cloudabi_util.h>
    
    #include <compat/cloudabi64/cloudabi64_proto.h>
    #include <compat/cloudabi64/cloudabi64_util.h>
    
    static MALLOC_DEFINE(M_SOCKET, "socket", "CloudABI socket");
    
    int
    cloudabi64_sys_sock_recv(struct thread *td,
        struct cloudabi64_sys_sock_recv_args *uap)
    {
            cloudabi64_recv_in_t ri;
            cloudabi64_recv_out_t ro = {};
            cloudabi64_iovec_t iovobj;
            struct iovec *iov;
            const cloudabi64_iovec_t *user_iov;
            size_t i, rdatalen, rfdslen;
            int error;
    
            error = copyin(uap->in, &ri, sizeof(ri));
            if (error != 0)
                    return (error);
    
            /* Convert iovecs to native format. */
            if (ri.ri_data_len > UIO_MAXIOV)
                    return (EINVAL);
            iov = malloc(ri.ri_data_len * sizeof(struct iovec),
                M_SOCKET, M_WAITOK);
            user_iov = TO_PTR(ri.ri_data);
            for (i = 0; i < ri.ri_data_len; i++) {
                    error = copyin(&user_iov[i], &iovobj, sizeof(iovobj));
                    if (error != 0) {
                            free(iov, M_SOCKET);
                            return (error);
                    }
                    iov[i].iov_base = TO_PTR(iovobj.buf);
                    iov[i].iov_len = iovobj.buf_len;
            }
    
            error = cloudabi_sock_recv(td, uap->sock, iov, ri.ri_data_len,
                TO_PTR(ri.ri_fds), ri.ri_fds_len, ri.ri_flags, &rdatalen,
                &rfdslen, &ro.ro_flags);
            free(iov, M_SOCKET);
            if (error != 0)
                    return (error);
    
            ro.ro_datalen = rdatalen;
            ro.ro_fdslen = rfdslen;
            return (copyout(&ro, uap->out, sizeof(ro)));
    }
    
    int
    cloudabi64_sys_sock_send(struct thread *td,
        struct cloudabi64_sys_sock_send_args *uap)
    {
            cloudabi64_send_in_t si;
            cloudabi64_send_out_t so = {};
            cloudabi64_ciovec_t iovobj;
            struct iovec *iov;
            const cloudabi64_ciovec_t *user_iov;
            size_t datalen, i;
            int error;
    
           error = copyin(uap->in, &si, sizeof(si));
           if (error != 0)
                   return (error);
   
           /* Convert iovecs to native format. */
           if (si.si_data_len > UIO_MAXIOV)
                   return (EINVAL);
           iov = malloc(si.si_data_len * sizeof(struct iovec),
               M_SOCKET, M_WAITOK);
           user_iov = TO_PTR(si.si_data);
           for (i = 0; i < si.si_data_len; i++) {
                   error = copyin(&user_iov[i], &iovobj, sizeof(iovobj));
                   if (error != 0) {
                           free(iov, M_SOCKET);
                           return (error);
                   }
                   iov[i].iov_base = TO_PTR(iovobj.buf);
                   iov[i].iov_len = iovobj.buf_len;
           }
   
           error = cloudabi_sock_send(td, uap->sock, iov, si.si_data_len,
               TO_PTR(si.si_fds), si.si_fds_len, &datalen);
           free(iov, M_SOCKET);
           if (error != 0)
                   return (error);
   
           so.so_datalen = datalen;
           return (copyout(&so, uap->out, sizeof(so)));
   }

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