d2223126c0
Reduce the potential amount of code duplication between cloudabi32 and cloudabi64 by creating a cloudabi_sock_recv() utility function. The cloudabi32 and cloudabi64 modules will then only contain code to convert the iovecs to the native pointer size. In cloudabi_sock_recv(), we can now construct an SCM_RIGHTS cmsghdr in an mbuf and pass that on to kern_sendit().
142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/*-
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* Copyright (c) 2015-2017 Nuxi, https://nuxi.nl/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/syscallsubr.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <contrib/cloudabi/cloudabi32_types.h>
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#include <compat/cloudabi/cloudabi_util.h>
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#include <compat/cloudabi32/cloudabi32_proto.h>
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#include <compat/cloudabi32/cloudabi32_util.h>
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static MALLOC_DEFINE(M_SOCKET, "socket", "CloudABI socket");
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int
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cloudabi32_sys_sock_recv(struct thread *td,
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struct cloudabi32_sys_sock_recv_args *uap)
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{
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struct sockaddr_storage ss;
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cloudabi32_recv_in_t ri;
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cloudabi32_recv_out_t ro = {};
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cloudabi32_iovec_t iovobj;
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struct msghdr msghdr = {};
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const cloudabi32_iovec_t *user_iov;
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size_t i;
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int error;
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error = copyin(uap->in, &ri, sizeof(ri));
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if (error != 0)
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return (error);
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/* Convert results in cloudabi_recv_in_t to struct msghdr. */
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if (ri.ri_data_len > UIO_MAXIOV)
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return (EINVAL);
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msghdr.msg_iovlen = ri.ri_data_len;
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msghdr.msg_iov = malloc(msghdr.msg_iovlen * sizeof(struct iovec),
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M_SOCKET, M_WAITOK);
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user_iov = TO_PTR(ri.ri_data);
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for (i = 0; i < msghdr.msg_iovlen; i++) {
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error = copyin(&user_iov[i], &iovobj, sizeof(iovobj));
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if (error != 0) {
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free(msghdr.msg_iov, M_SOCKET);
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return (error);
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}
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msghdr.msg_iov[i].iov_base = TO_PTR(iovobj.buf);
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msghdr.msg_iov[i].iov_len = iovobj.buf_len;
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}
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msghdr.msg_name = &ss;
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msghdr.msg_namelen = sizeof(ss);
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if (ri.ri_flags & CLOUDABI_MSG_PEEK)
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msghdr.msg_flags |= MSG_PEEK;
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if (ri.ri_flags & CLOUDABI_MSG_WAITALL)
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msghdr.msg_flags |= MSG_WAITALL;
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/* TODO(ed): Add file descriptor passing. */
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error = kern_recvit(td, uap->sock, &msghdr, UIO_SYSSPACE, NULL);
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free(msghdr.msg_iov, M_SOCKET);
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if (error != 0)
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return (error);
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/* Convert results in msghdr to cloudabi_recv_out_t. */
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ro.ro_datalen = td->td_retval[0];
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cloudabi_convert_sockaddr((struct sockaddr *)&ss,
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MIN(msghdr.msg_namelen, sizeof(ss)), &ro.ro_peername);
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td->td_retval[0] = 0;
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return (copyout(&ro, uap->out, sizeof(ro)));
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}
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int
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cloudabi32_sys_sock_send(struct thread *td,
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struct cloudabi32_sys_sock_send_args *uap)
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{
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cloudabi32_send_in_t si;
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cloudabi32_send_out_t so = {};
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cloudabi32_ciovec_t iovobj;
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struct iovec *iov;
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const cloudabi32_ciovec_t *user_iov;
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size_t datalen, i;
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int error;
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error = copyin(uap->in, &si, sizeof(si));
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if (error != 0)
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return (error);
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/* Convert iovecs to native format. */
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if (si.si_data_len > UIO_MAXIOV)
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return (EINVAL);
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iov = malloc(si.si_data_len * sizeof(struct iovec),
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M_SOCKET, M_WAITOK);
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user_iov = TO_PTR(si.si_data);
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for (i = 0; i < si.si_data_len; i++) {
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error = copyin(&user_iov[i], &iovobj, sizeof(iovobj));
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if (error != 0) {
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free(iov, M_SOCKET);
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return (error);
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}
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iov[i].iov_base = TO_PTR(iovobj.buf);
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iov[i].iov_len = iovobj.buf_len;
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}
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error = cloudabi_sock_send(td, uap->sock, iov, si.si_data_len,
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TO_PTR(si.si_fds), si.si_fds_len, si.si_flags, &datalen);
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free(iov, M_SOCKET);
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if (error != 0)
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return (error);
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so.so_datalen = datalen;
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return (copyout(&so, uap->out, sizeof(so)));
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}
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