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/*-
* Copyright (c) 2015 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/capsicum.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/un.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <compat/cloudabi/cloudabi_proto.h>
#include <compat/cloudabi/cloudabi_syscalldefs.h>
#include <compat/cloudabi/cloudabi_util.h>
/* Converts FreeBSD's struct sockaddr to CloudABI's cloudabi_sockaddr_t. */
void
cloudabi_convert_sockaddr(const struct sockaddr *sa, socklen_t sal,
cloudabi_sockaddr_t *rsa)
{
const struct sockaddr_in *sin;
const struct sockaddr_in6 *sin6;
/* Zero-sized socket address. */
if (sal < offsetof(struct sockaddr, sa_family) + sizeof(sa->sa_family))
return;
switch (sa->sa_family) {
case AF_INET:
if (sal < sizeof(struct sockaddr_in))
return;
sin = (const struct sockaddr_in *)sa;
rsa->sa_family = CLOUDABI_AF_INET;
memcpy(&rsa->sa_inet.addr, &sin->sin_addr,
sizeof(rsa->sa_inet.addr));
rsa->sa_inet.port = ntohs(sin->sin_port);
return;
case AF_INET6:
if (sal < sizeof(struct sockaddr_in6))
return;
sin6 = (const struct sockaddr_in6 *)sa;
rsa->sa_family = CLOUDABI_AF_INET6;
memcpy(&rsa->sa_inet6.addr, &sin6->sin6_addr,
sizeof(rsa->sa_inet6.addr));
rsa->sa_inet6.port = ntohs(sin6->sin6_port);
return;
case AF_UNIX:
rsa->sa_family = CLOUDABI_AF_UNIX;
return;
}
}
/* Copies a pathname into a UNIX socket address structure. */
static int
copyin_sockaddr_un(const char *path, size_t pathlen, struct sockaddr_un *sun)
{
int error;
/* Copy in pathname string if there's enough space. */
if (pathlen >= sizeof(sun->sun_path))
return (ENAMETOOLONG);
error = copyin(path, &sun->sun_path, pathlen);
if (error != 0)
return (error);
if (memchr(sun->sun_path, '\0', pathlen) != NULL)
return (EINVAL);
/* Initialize the rest of the socket address. */
sun->sun_path[pathlen] = '\0';
sun->sun_family = AF_UNIX;
sun->sun_len = sizeof(*sun);
return (0);
}
int
cloudabi_sys_sock_accept(struct thread *td,
struct cloudabi_sys_sock_accept_args *uap)
{
struct sockaddr *sa;
cloudabi_sockstat_t ss = {};
socklen_t sal;
int error;
if (uap->buf == NULL) {
/* Only return the new file descriptor number. */
return (kern_accept(td, uap->s, NULL, NULL, NULL));
} else {
/* Also return properties of the new socket descriptor. */
sal = MAX(sizeof(struct sockaddr_in),
sizeof(struct sockaddr_in6));
error = kern_accept(td, uap->s, (void *)&sa, &sal, NULL);
if (error != 0)
return (error);
/* TODO(ed): Fill the other members of cloudabi_sockstat_t. */
cloudabi_convert_sockaddr(sa, sal, &ss.ss_peername);
free(sa, M_SONAME);
return (copyout(&ss, uap->buf, sizeof(ss)));
}
}
int
cloudabi_sys_sock_bind(struct thread *td,
struct cloudabi_sys_sock_bind_args *uap)
{
struct sockaddr_un sun;
int error;
error = copyin_sockaddr_un(uap->path, uap->pathlen, &sun);
if (error != 0)
return (error);
return (kern_bindat(td, uap->fd, uap->s, (struct sockaddr *)&sun));
}
int
cloudabi_sys_sock_connect(struct thread *td,
struct cloudabi_sys_sock_connect_args *uap)
{
struct sockaddr_un sun;
int error;
error = copyin_sockaddr_un(uap->path, uap->pathlen, &sun);
if (error != 0)
return (error);
return (kern_connectat(td, uap->fd, uap->s, (struct sockaddr *)&sun));
}
int
cloudabi_sys_sock_listen(struct thread *td,
struct cloudabi_sys_sock_listen_args *uap)
{
struct listen_args listen_args = {
.s = uap->s,
.backlog = uap->backlog,
};
return (sys_listen(td, &listen_args));
}
int
cloudabi_sys_sock_shutdown(struct thread *td,
struct cloudabi_sys_sock_shutdown_args *uap)
{
struct shutdown_args shutdown_args = {
.s = uap->fd,
};
switch (uap->how) {
case CLOUDABI_SHUT_RD:
shutdown_args.how = SHUT_RD;
break;
case CLOUDABI_SHUT_WR:
shutdown_args.how = SHUT_WR;
break;
case CLOUDABI_SHUT_RD | CLOUDABI_SHUT_WR:
shutdown_args.how = SHUT_RDWR;
break;
default:
return (EINVAL);
}
return (sys_shutdown(td, &shutdown_args));
}
int
cloudabi_sys_sock_stat_get(struct thread *td,
struct cloudabi_sys_sock_stat_get_args *uap)
{
cloudabi_sockstat_t ss = {};
cap_rights_t rights;
struct file *fp;
struct sockaddr *sa;
struct socket *so;
int error;
error = getsock_cap(td, uap->fd, cap_rights_init(&rights,
CAP_GETSOCKOPT | CAP_GETPEERNAME | CAP_GETSOCKNAME), &fp, NULL);
if (error != 0)
return (error);
so = fp->f_data;
CURVNET_SET(so->so_vnet);
/* Set ss_sockname. */
error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
if (error == 0) {
cloudabi_convert_sockaddr(sa, sa->sa_len, &ss.ss_sockname);
free(sa, M_SONAME);
}
/* Set ss_peername. */
if ((so->so_state & (SS_ISCONNECTED | SS_ISCONFIRMING)) != 0) {
error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa);
if (error == 0) {
cloudabi_convert_sockaddr(sa, sa->sa_len,
&ss.ss_peername);
free(sa, M_SONAME);
}
}
CURVNET_RESTORE();
/* Set ss_error. */
SOCK_LOCK(so);
ss.ss_error = so->so_error;
if ((uap->flags & CLOUDABI_SOCKSTAT_CLEAR_ERROR) != 0)
so->so_error = 0;
SOCK_UNLOCK(so);
/* Set ss_state. */
if ((so->so_options & SO_ACCEPTCONN) != 0)
ss.ss_state |= CLOUDABI_SOCKSTAT_ACCEPTCONN;
fdrop(fp, td);
return (copyout(&ss, uap->buf, sizeof(ss)));
}
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