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freebsd-dev/sys/compat/linux/linux_socket.c
Edward Tomasz Napierala 3bc69ad9b3 Make linux(4) handle SO_REUSEPORT. 
Reviewed by:	emaste
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D25216
2020-06-11 12:25:49 +00:00

1817 lines
42 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1995 Søren Schmidt
* All rights reserved.
*
* 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("$FreeBSD$");
/* XXX we use functions that might not exist. */
#include "opt_compat.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/capsicum.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syscallsubr.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/un.h>
#include <sys/unistd.h>
#include <security/audit/audit.h>
#include <net/if.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif
#ifdef COMPAT_LINUX32
#include <machine/../linux32/linux.h>
#include <machine/../linux32/linux32_proto.h>
#else
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#endif
#include <compat/linux/linux_common.h>
#include <compat/linux/linux_file.h>
#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_socket.h>
#include <compat/linux/linux_timer.h>
#include <compat/linux/linux_util.h>
static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *,
l_uint);
static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *,
l_uint, struct msghdr *);
static int linux_set_socket_flags(int, int *);
static int
linux_to_bsd_sockopt_level(int level)
{
switch (level) {
case LINUX_SOL_SOCKET:
return (SOL_SOCKET);
}
return (level);
}
static int
bsd_to_linux_sockopt_level(int level)
{
switch (level) {
case SOL_SOCKET:
return (LINUX_SOL_SOCKET);
}
return (level);
}
static int
linux_to_bsd_ip_sockopt(int opt)
{
switch (opt) {
case LINUX_IP_TOS:
return (IP_TOS);
case LINUX_IP_TTL:
return (IP_TTL);
case LINUX_IP_OPTIONS:
return (IP_OPTIONS);
case LINUX_IP_MULTICAST_IF:
return (IP_MULTICAST_IF);
case LINUX_IP_MULTICAST_TTL:
return (IP_MULTICAST_TTL);
case LINUX_IP_MULTICAST_LOOP:
return (IP_MULTICAST_LOOP);
case LINUX_IP_ADD_MEMBERSHIP:
return (IP_ADD_MEMBERSHIP);
case LINUX_IP_DROP_MEMBERSHIP:
return (IP_DROP_MEMBERSHIP);
case LINUX_IP_HDRINCL:
return (IP_HDRINCL);
}
return (-1);
}
static int
linux_to_bsd_ip6_sockopt(int opt)
{
switch (opt) {
case LINUX_IPV6_NEXTHOP:
return (IPV6_NEXTHOP);
case LINUX_IPV6_UNICAST_HOPS:
return (IPV6_UNICAST_HOPS);
case LINUX_IPV6_MULTICAST_IF:
return (IPV6_MULTICAST_IF);
case LINUX_IPV6_MULTICAST_HOPS:
return (IPV6_MULTICAST_HOPS);
case LINUX_IPV6_MULTICAST_LOOP:
return (IPV6_MULTICAST_LOOP);
case LINUX_IPV6_ADD_MEMBERSHIP:
return (IPV6_JOIN_GROUP);
case LINUX_IPV6_DROP_MEMBERSHIP:
return (IPV6_LEAVE_GROUP);
case LINUX_IPV6_V6ONLY:
return (IPV6_V6ONLY);
case LINUX_IPV6_DONTFRAG:
return (IPV6_DONTFRAG);
#if 0
case LINUX_IPV6_CHECKSUM:
return (IPV6_CHECKSUM);
case LINUX_IPV6_RECVPKTINFO:
return (IPV6_RECVPKTINFO);
case LINUX_IPV6_PKTINFO:
return (IPV6_PKTINFO);
case LINUX_IPV6_RECVHOPLIMIT:
return (IPV6_RECVHOPLIMIT);
case LINUX_IPV6_HOPLIMIT:
return (IPV6_HOPLIMIT);
case LINUX_IPV6_RECVHOPOPTS:
return (IPV6_RECVHOPOPTS);
case LINUX_IPV6_HOPOPTS:
return (IPV6_HOPOPTS);
case LINUX_IPV6_RTHDRDSTOPTS:
return (IPV6_RTHDRDSTOPTS);
case LINUX_IPV6_RECVRTHDR:
return (IPV6_RECVRTHDR);
case LINUX_IPV6_RTHDR:
return (IPV6_RTHDR);
case LINUX_IPV6_RECVDSTOPTS:
return (IPV6_RECVDSTOPTS);
case LINUX_IPV6_DSTOPTS:
return (IPV6_DSTOPTS);
case LINUX_IPV6_RECVPATHMTU:
return (IPV6_RECVPATHMTU);
case LINUX_IPV6_PATHMTU:
return (IPV6_PATHMTU);
#endif
}
return (-1);
}
static int
linux_to_bsd_so_sockopt(int opt)
{
switch (opt) {
case LINUX_SO_DEBUG:
return (SO_DEBUG);
case LINUX_SO_REUSEADDR:
return (SO_REUSEADDR);
case LINUX_SO_TYPE:
return (SO_TYPE);
case LINUX_SO_ERROR:
return (SO_ERROR);
case LINUX_SO_DONTROUTE:
return (SO_DONTROUTE);
case LINUX_SO_BROADCAST:
return (SO_BROADCAST);
case LINUX_SO_SNDBUF:
case LINUX_SO_SNDBUFFORCE:
return (SO_SNDBUF);
case LINUX_SO_RCVBUF:
case LINUX_SO_RCVBUFFORCE:
return (SO_RCVBUF);
case LINUX_SO_KEEPALIVE:
return (SO_KEEPALIVE);
case LINUX_SO_OOBINLINE:
return (SO_OOBINLINE);
case LINUX_SO_LINGER:
return (SO_LINGER);
case LINUX_SO_REUSEPORT:
return (SO_REUSEPORT_LB);
case LINUX_SO_PEERCRED:
return (LOCAL_PEERCRED);
case LINUX_SO_RCVLOWAT:
return (SO_RCVLOWAT);
case LINUX_SO_SNDLOWAT:
return (SO_SNDLOWAT);
case LINUX_SO_RCVTIMEO:
return (SO_RCVTIMEO);
case LINUX_SO_SNDTIMEO:
return (SO_SNDTIMEO);
case LINUX_SO_TIMESTAMP:
return (SO_TIMESTAMP);
case LINUX_SO_ACCEPTCONN:
return (SO_ACCEPTCONN);
}
return (-1);
}
static int
linux_to_bsd_tcp_sockopt(int opt)
{
switch (opt) {
case LINUX_TCP_NODELAY:
return (TCP_NODELAY);
case LINUX_TCP_MAXSEG:
return (TCP_MAXSEG);
case LINUX_TCP_CORK:
return (TCP_NOPUSH);
case LINUX_TCP_KEEPIDLE:
return (TCP_KEEPIDLE);
case LINUX_TCP_KEEPINTVL:
return (TCP_KEEPINTVL);
case LINUX_TCP_KEEPCNT:
return (TCP_KEEPCNT);
case LINUX_TCP_MD5SIG:
return (TCP_MD5SIG);
}
return (-1);
}
static int
linux_to_bsd_msg_flags(int flags)
{
int ret_flags = 0;
if (flags & LINUX_MSG_OOB)
ret_flags |= MSG_OOB;
if (flags & LINUX_MSG_PEEK)
ret_flags |= MSG_PEEK;
if (flags & LINUX_MSG_DONTROUTE)
ret_flags |= MSG_DONTROUTE;
if (flags & LINUX_MSG_CTRUNC)
ret_flags |= MSG_CTRUNC;
if (flags & LINUX_MSG_TRUNC)
ret_flags |= MSG_TRUNC;
if (flags & LINUX_MSG_DONTWAIT)
ret_flags |= MSG_DONTWAIT;
if (flags & LINUX_MSG_EOR)
ret_flags |= MSG_EOR;
if (flags & LINUX_MSG_WAITALL)
ret_flags |= MSG_WAITALL;
if (flags & LINUX_MSG_NOSIGNAL)
ret_flags |= MSG_NOSIGNAL;
#if 0 /* not handled */
if (flags & LINUX_MSG_PROXY)
;
if (flags & LINUX_MSG_FIN)
;
if (flags & LINUX_MSG_SYN)
;
if (flags & LINUX_MSG_CONFIRM)
;
if (flags & LINUX_MSG_RST)
;
if (flags & LINUX_MSG_ERRQUEUE)
;
#endif
return (ret_flags);
}
static int
linux_to_bsd_cmsg_type(int cmsg_type)
{
switch (cmsg_type) {
case LINUX_SCM_RIGHTS:
return (SCM_RIGHTS);
case LINUX_SCM_CREDENTIALS:
return (SCM_CREDS);
}
return (-1);
}
static int
bsd_to_linux_cmsg_type(int cmsg_type)
{
switch (cmsg_type) {
case SCM_RIGHTS:
return (LINUX_SCM_RIGHTS);
case SCM_CREDS:
return (LINUX_SCM_CREDENTIALS);
case SCM_TIMESTAMP:
return (LINUX_SCM_TIMESTAMP);
}
return (-1);
}
static int
linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr)
{
if (lhdr->msg_controllen > INT_MAX)
return (ENOBUFS);
bhdr->msg_name = PTRIN(lhdr->msg_name);
bhdr->msg_namelen = lhdr->msg_namelen;
bhdr->msg_iov = PTRIN(lhdr->msg_iov);
bhdr->msg_iovlen = lhdr->msg_iovlen;
bhdr->msg_control = PTRIN(lhdr->msg_control);
/*
* msg_controllen is skipped since BSD and LINUX control messages
* are potentially different sizes (e.g. the cred structure used
* by SCM_CREDS is different between the two operating system).
*
* The caller can set it (if necessary) after converting all the
* control messages.
*/
bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags);
return (0);
}
static int
bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr)
{
lhdr->msg_name = PTROUT(bhdr->msg_name);
lhdr->msg_namelen = bhdr->msg_namelen;
lhdr->msg_iov = PTROUT(bhdr->msg_iov);
lhdr->msg_iovlen = bhdr->msg_iovlen;
lhdr->msg_control = PTROUT(bhdr->msg_control);
/*
* msg_controllen is skipped since BSD and LINUX control messages
* are potentially different sizes (e.g. the cred structure used
* by SCM_CREDS is different between the two operating system).
*
* The caller can set it (if necessary) after converting all the
* control messages.
*/
/* msg_flags skipped */
return (0);
}
static int
linux_set_socket_flags(int lflags, int *flags)
{
if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK))
return (EINVAL);
if (lflags & LINUX_SOCK_NONBLOCK)
*flags |= SOCK_NONBLOCK;
if (lflags & LINUX_SOCK_CLOEXEC)
*flags |= SOCK_CLOEXEC;
return (0);
}
static int
linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
struct mbuf *control, enum uio_seg segflg)
{
struct sockaddr *to;
int error, len;
if (mp->msg_name != NULL) {
len = mp->msg_namelen;
error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len);
if (error != 0)
return (error);
mp->msg_name = to;
} else
to = NULL;
error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control,
segflg);
if (to)
free(to, M_SONAME);
return (error);
}
/* Return 0 if IP_HDRINCL is set for the given socket. */
static int
linux_check_hdrincl(struct thread *td, int s)
{
int error, optval;
socklen_t size_val;
size_val = sizeof(optval);
error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL,
&optval, UIO_SYSSPACE, &size_val);
if (error != 0)
return (error);
return (optval == 0);
}
/*
* Updated sendto() when IP_HDRINCL is set:
* tweak endian-dependent fields in the IP packet.
*/
static int
linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args)
{
/*
* linux_ip_copysize defines how many bytes we should copy
* from the beginning of the IP packet before we customize it for BSD.
* It should include all the fields we modify (ip_len and ip_off).
*/
#define linux_ip_copysize 8
struct ip *packet;
struct msghdr msg;
struct iovec aiov[1];
int error;
/* Check that the packet isn't too big or too small. */
if (linux_args->len < linux_ip_copysize ||
linux_args->len > IP_MAXPACKET)
return (EINVAL);
packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK);
/* Make kernel copy of the packet to be sent */
if ((error = copyin(PTRIN(linux_args->msg), packet,
linux_args->len)))
goto goout;
/* Convert fields from Linux to BSD raw IP socket format */
packet->ip_len = linux_args->len;
packet->ip_off = ntohs(packet->ip_off);
/* Prepare the msghdr and iovec structures describing the new packet */
msg.msg_name = PTRIN(linux_args->to);
msg.msg_namelen = linux_args->tolen;
msg.msg_iov = aiov;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_flags = 0;
aiov[0].iov_base = (char *)packet;
aiov[0].iov_len = linux_args->len;
error = linux_sendit(td, linux_args->s, &msg, linux_args->flags,
NULL, UIO_SYSSPACE);
goout:
free(packet, M_LINUX);
return (error);
}
int
linux_socket(struct thread *td, struct linux_socket_args *args)
{
int domain, retval_socket, type;
type = args->type & LINUX_SOCK_TYPE_MASK;
if (type < 0 || type > LINUX_SOCK_MAX)
return (EINVAL);
retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
&type);
if (retval_socket != 0)
return (retval_socket);
domain = linux_to_bsd_domain(args->domain);
if (domain == -1)
return (EAFNOSUPPORT);
retval_socket = kern_socket(td, domain, type, args->protocol);
if (retval_socket)
return (retval_socket);
if (type == SOCK_RAW
&& (args->protocol == IPPROTO_RAW || args->protocol == 0)
&& domain == PF_INET) {
/* It's a raw IP socket: set the IP_HDRINCL option. */
int hdrincl;
hdrincl = 1;
/* We ignore any error returned by kern_setsockopt() */
kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL,
&hdrincl, UIO_SYSSPACE, sizeof(hdrincl));
}
#ifdef INET6
/*
* Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default
* and some apps depend on this. So, set V6ONLY to 0 for Linux apps.
* For simplicity we do this unconditionally of the net.inet6.ip6.v6only
* sysctl value.
*/
if (domain == PF_INET6) {
int v6only;
v6only = 0;
/* We ignore any error returned by setsockopt() */
kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY,
&v6only, UIO_SYSSPACE, sizeof(v6only));
}
#endif
return (retval_socket);
}
int
linux_bind(struct thread *td, struct linux_bind_args *args)
{
struct sockaddr *sa;
int error;
error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa,
&args->namelen);
if (error != 0)
return (error);
error = kern_bindat(td, AT_FDCWD, args->s, sa);
free(sa, M_SONAME);
/* XXX */
if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in))
return (EINVAL);
return (error);
}
int
linux_connect(struct thread *td, struct linux_connect_args *args)
{
struct socket *so;
struct sockaddr *sa;
struct file *fp;
u_int fflag;
int error;
error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa,
&args->namelen);
if (error != 0)
return (error);
error = kern_connectat(td, AT_FDCWD, args->s, sa);
free(sa, M_SONAME);
if (error != EISCONN)
return (error);
/*
* Linux doesn't return EISCONN the first time it occurs,
* when on a non-blocking socket. Instead it returns the
* error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD.
*/
error = getsock_cap(td, args->s, &cap_connect_rights,
&fp, &fflag, NULL);
if (error != 0)
return (error);
error = EISCONN;
so = fp->f_data;
if (fflag & FNONBLOCK) {
SOCK_LOCK(so);
if (so->so_emuldata == 0)
error = so->so_error;
so->so_emuldata = (void *)1;
SOCK_UNLOCK(so);
}
fdrop(fp, td);
return (error);
}
int
linux_listen(struct thread *td, struct linux_listen_args *args)
{
return (kern_listen(td, args->s, args->backlog));
}
static int
linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
l_uintptr_t namelen, int flags)
{
struct l_sockaddr *lsa;
struct sockaddr *sa;
struct file *fp;
int bflags, len;
struct socket *so;
int error, error1;
bflags = 0;
error = linux_set_socket_flags(flags, &bflags);
if (error != 0)
return (error);
sa = NULL;
if (PTRIN(addr) == NULL) {
len = 0;
error = kern_accept4(td, s, NULL, NULL, bflags, NULL);
} else {
error = copyin(PTRIN(namelen), &len, sizeof(len));
if (error != 0)
return (error);
if (len < 0)
return (EINVAL);
error = kern_accept4(td, s, &sa, &len, bflags, &fp);
if (error == 0)
fdrop(fp, td);
}
if (error != 0) {
/*
* XXX. This is wrong, different sockaddr structures
* have different sizes.
*/
if (error == EFAULT && namelen != sizeof(struct sockaddr_in))
{
error = EINVAL;
goto out;
}
if (error == EINVAL) {
error1 = getsock_cap(td, s, &cap_accept_rights, &fp, NULL, NULL);
if (error1 != 0) {
error = error1;
goto out;
}
so = fp->f_data;
if (so->so_type == SOCK_DGRAM)
error = EOPNOTSUPP;
fdrop(fp, td);
}
goto out;
}
if (len != 0 && error == 0) {
error = bsd_to_linux_sockaddr(sa, &lsa, len);
if (error == 0)
error = copyout(lsa, PTRIN(addr), len);
free(lsa, M_SONAME);
}
free(sa, M_SONAME);
out:
if (error != 0) {
(void)kern_close(td, td->td_retval[0]);
td->td_retval[0] = 0;
}
return (error);
}
int
linux_accept(struct thread *td, struct linux_accept_args *args)
{
return (linux_accept_common(td, args->s, args->addr,
args->namelen, 0));
}
int
linux_accept4(struct thread *td, struct linux_accept4_args *args)
{
return (linux_accept_common(td, args->s, args->addr,
args->namelen, args->flags));
}
int
linux_getsockname(struct thread *td, struct linux_getsockname_args *args)
{
struct l_sockaddr *lsa;
struct sockaddr *sa;
int len, error;
error = copyin(PTRIN(args->namelen), &len, sizeof(len));
if (error != 0)
return (error);
error = kern_getsockname(td, args->s, &sa, &len);
if (error != 0)
return (error);
if (len != 0) {
error = bsd_to_linux_sockaddr(sa, &lsa, len);
if (error == 0)
error = copyout(lsa, PTRIN(args->addr),
len);
free(lsa, M_SONAME);
}
free(sa, M_SONAME);
if (error == 0)
error = copyout(&len, PTRIN(args->namelen), sizeof(len));
return (error);
}
int
linux_getpeername(struct thread *td, struct linux_getpeername_args *args)
{
struct l_sockaddr *lsa;
struct sockaddr *sa;
int len, error;
error = copyin(PTRIN(args->namelen), &len, sizeof(len));
if (error != 0)
return (error);
if (len < 0)
return (EINVAL);
error = kern_getpeername(td, args->s, &sa, &len);
if (error != 0)
return (error);
if (len != 0) {
error = bsd_to_linux_sockaddr(sa, &lsa, len);
if (error == 0)
error = copyout(lsa, PTRIN(args->addr),
len);
free(lsa, M_SONAME);
}
free(sa, M_SONAME);
if (error == 0)
error = copyout(&len, PTRIN(args->namelen), sizeof(len));
return (error);
}
int
linux_socketpair(struct thread *td, struct linux_socketpair_args *args)
{
int domain, error, sv[2], type;
domain = linux_to_bsd_domain(args->domain);
if (domain != PF_LOCAL)
return (EAFNOSUPPORT);
type = args->type & LINUX_SOCK_TYPE_MASK;
if (type < 0 || type > LINUX_SOCK_MAX)
return (EINVAL);
error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK,
&type);
if (error != 0)
return (error);
if (args->protocol != 0 && args->protocol != PF_UNIX) {
/*
* Use of PF_UNIX as protocol argument is not right,
* but Linux does it.
* Do not map PF_UNIX as its Linux value is identical
* to FreeBSD one.
*/
return (EPROTONOSUPPORT);
}
error = kern_socketpair(td, domain, type, 0, sv);
if (error != 0)
return (error);
error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int));
if (error != 0) {
(void)kern_close(td, sv[0]);
(void)kern_close(td, sv[1]);
}
return (error);
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
struct linux_send_args {
register_t s;
register_t msg;
register_t len;
register_t flags;
};
static int
linux_send(struct thread *td, struct linux_send_args *args)
{
struct sendto_args /* {
int s;
caddr_t buf;
int len;
int flags;
caddr_t to;
int tolen;
} */ bsd_args;
struct file *fp;
int error, fflag;
bsd_args.s = args->s;
bsd_args.buf = (caddr_t)PTRIN(args->msg);
bsd_args.len = args->len;
bsd_args.flags = args->flags;
bsd_args.to = NULL;
bsd_args.tolen = 0;
error = sys_sendto(td, &bsd_args);
if (error == ENOTCONN) {
/*
* Linux doesn't return ENOTCONN for non-blocking sockets.
* Instead it returns the EAGAIN.
*/
error = getsock_cap(td, args->s, &cap_send_rights, &fp,
&fflag, NULL);
if (error == 0) {
if (fflag & FNONBLOCK)
error = EAGAIN;
fdrop(fp, td);
}
}
return (error);
}
struct linux_recv_args {
register_t s;
register_t msg;
register_t len;
register_t flags;
};
static int
linux_recv(struct thread *td, struct linux_recv_args *args)
{
struct recvfrom_args /* {
int s;
caddr_t buf;
int len;
int flags;
struct sockaddr *from;
socklen_t fromlenaddr;
} */ bsd_args;
bsd_args.s = args->s;
bsd_args.buf = (caddr_t)PTRIN(args->msg);
bsd_args.len = args->len;
bsd_args.flags = linux_to_bsd_msg_flags(args->flags);
bsd_args.from = NULL;
bsd_args.fromlenaddr = 0;
return (sys_recvfrom(td, &bsd_args));
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
int
linux_sendto(struct thread *td, struct linux_sendto_args *args)
{
struct msghdr msg;
struct iovec aiov;
if (linux_check_hdrincl(td, args->s) == 0)
/* IP_HDRINCL set, tweak the packet before sending */
return (linux_sendto_hdrincl(td, args));
msg.msg_name = PTRIN(args->to);
msg.msg_namelen = args->tolen;
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_flags = 0;
aiov.iov_base = PTRIN(args->msg);
aiov.iov_len = args->len;
return (linux_sendit(td, args->s, &msg, args->flags, NULL,
UIO_USERSPACE));
}
int
linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args)
{
struct l_sockaddr *lsa;
struct sockaddr *sa;
struct msghdr msg;
struct iovec aiov;
int error, fromlen;
if (PTRIN(args->fromlen) != NULL) {
error = copyin(PTRIN(args->fromlen), &fromlen,
sizeof(fromlen));
if (error != 0)
return (error);
if (fromlen < 0)
return (EINVAL);
sa = malloc(fromlen, M_SONAME, M_WAITOK);
} else {
fromlen = 0;
sa = NULL;
}
msg.msg_name = sa;
msg.msg_namelen = fromlen;
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
aiov.iov_base = PTRIN(args->buf);
aiov.iov_len = args->len;
msg.msg_control = 0;
msg.msg_flags = linux_to_bsd_msg_flags(args->flags);
error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL);
if (error != 0)
goto out;
if (PTRIN(args->from) != NULL) {
error = bsd_to_linux_sockaddr(sa, &lsa, msg.msg_namelen);
if (error == 0)
error = copyout(lsa, PTRIN(args->from),
msg.msg_namelen);
free(lsa, M_SONAME);
}
if (error == 0 && PTRIN(args->fromlen) != NULL)
error = copyout(&msg.msg_namelen, PTRIN(args->fromlen),
sizeof(msg.msg_namelen));
out:
free(sa, M_SONAME);
return (error);
}
static int
linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
l_uint flags)
{
struct cmsghdr *cmsg;
struct mbuf *control;
struct msghdr msg;
struct l_cmsghdr linux_cmsg;
struct l_cmsghdr *ptr_cmsg;
struct l_msghdr linux_msg;
struct iovec *iov;
socklen_t datalen;
struct sockaddr *sa;
struct socket *so;
sa_family_t sa_family;
struct file *fp;
void *data;
l_size_t len;
l_size_t clen;
int error, fflag;
error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
if (error != 0)
return (error);
/*
* Some Linux applications (ping) define a non-NULL control data
* pointer, but a msg_controllen of 0, which is not allowed in the
* FreeBSD system call interface. NULL the msg_control pointer in
* order to handle this case. This should be checked, but allows the
* Linux ping to work.
*/
if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0)
linux_msg.msg_control = PTROUT(NULL);
error = linux_to_bsd_msghdr(&msg, &linux_msg);
if (error != 0)
return (error);
#ifdef COMPAT_LINUX32
error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen,
&iov, EMSGSIZE);
#else
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
#endif
if (error != 0)
return (error);
control = NULL;
error = kern_getsockname(td, s, &sa, &datalen);
if (error != 0)
goto bad;
sa_family = sa->sa_family;
free(sa, M_SONAME);
if (flags & LINUX_MSG_OOB) {
error = EOPNOTSUPP;
if (sa_family == AF_UNIX)
goto bad;
error = getsock_cap(td, s, &cap_send_rights, &fp,
&fflag, NULL);
if (error != 0)
goto bad;
so = fp->f_data;
if (so->so_type != SOCK_STREAM)
error = EOPNOTSUPP;
fdrop(fp, td);
if (error != 0)
goto bad;
}
if (linux_msg.msg_controllen >= sizeof(struct l_cmsghdr)) {
error = ENOBUFS;
control = m_get(M_WAITOK, MT_CONTROL);
MCLGET(control, M_WAITOK);
data = mtod(control, void *);
datalen = 0;
ptr_cmsg = PTRIN(linux_msg.msg_control);
clen = linux_msg.msg_controllen;
do {
error = copyin(ptr_cmsg, &linux_cmsg,
sizeof(struct l_cmsghdr));
if (error != 0)
goto bad;
error = EINVAL;
if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) ||
linux_cmsg.cmsg_len > clen)
goto bad;
if (datalen + CMSG_HDRSZ > MCLBYTES)
goto bad;
/*
* Now we support only SCM_RIGHTS and SCM_CRED,
* so return EINVAL in any other cmsg_type
*/
cmsg = data;
cmsg->cmsg_type =
linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type);
cmsg->cmsg_level =
linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level);
if (cmsg->cmsg_type == -1
|| cmsg->cmsg_level != SOL_SOCKET)
goto bad;
/*
* Some applications (e.g. pulseaudio) attempt to
* send ancillary data even if the underlying protocol
* doesn't support it which is not allowed in the
* FreeBSD system call interface.
*/
if (sa_family != AF_UNIX)
continue;
if (cmsg->cmsg_type == SCM_CREDS) {
len = sizeof(struct cmsgcred);
if (datalen + CMSG_SPACE(len) > MCLBYTES)
goto bad;
/*
* The lower levels will fill in the structure
*/
memset(CMSG_DATA(data), 0, len);
} else {
len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ;
if (datalen + CMSG_SPACE(len) < datalen ||
datalen + CMSG_SPACE(len) > MCLBYTES)
goto bad;
error = copyin(LINUX_CMSG_DATA(ptr_cmsg),
CMSG_DATA(data), len);
if (error != 0)
goto bad;
}
cmsg->cmsg_len = CMSG_LEN(len);
data = (char *)data + CMSG_SPACE(len);
datalen += CMSG_SPACE(len);
if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len))
break;
clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len);
ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg +
LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len));
} while(clen >= sizeof(struct l_cmsghdr));
control->m_len = datalen;
if (datalen == 0) {
m_freem(control);
control = NULL;
}
}
msg.msg_iov = iov;
msg.msg_flags = 0;
error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE);
control = NULL;
bad:
m_freem(control);
free(iov, M_IOV);
return (error);
}
int
linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args)
{
return (linux_sendmsg_common(td, args->s, PTRIN(args->msg),
args->flags));
}
int
linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args)
{
struct l_mmsghdr *msg;
l_uint retval;
int error, datagrams;
if (args->vlen > UIO_MAXIOV)
args->vlen = UIO_MAXIOV;
msg = PTRIN(args->msg);
datagrams = 0;
while (datagrams < args->vlen) {
error = linux_sendmsg_common(td, args->s, &msg->msg_hdr,
args->flags);
if (error != 0)
break;
retval = td->td_retval[0];
error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
if (error != 0)
break;
++msg;
++datagrams;
}
if (error == 0)
td->td_retval[0] = datagrams;
return (error);
}
static int
linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
l_uint flags, struct msghdr *msg)
{
struct cmsghdr *cm;
struct cmsgcred *cmcred;
struct l_cmsghdr *linux_cmsg = NULL;
struct l_ucred linux_ucred;
socklen_t datalen, maxlen, outlen;
struct l_msghdr linux_msg;
struct iovec *iov, *uiov;
struct mbuf *control = NULL;
struct mbuf **controlp;
struct timeval *ftmvl;
struct l_sockaddr *lsa;
struct sockaddr *sa;
l_timeval ltmvl;
caddr_t outbuf;
void *data;
int error, i, fd, fds, *fdp;
error = copyin(msghdr, &linux_msg, sizeof(linux_msg));
if (error != 0)
return (error);
error = linux_to_bsd_msghdr(msg, &linux_msg);
if (error != 0)
return (error);
#ifdef COMPAT_LINUX32
error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen,
&iov, EMSGSIZE);
#else
error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE);
#endif
if (error != 0)
return (error);
if (msg->msg_name) {
sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK);
msg->msg_name = sa;
} else
sa = NULL;
uiov = msg->msg_iov;
msg->msg_iov = iov;
controlp = (msg->msg_control != NULL) ? &control : NULL;
error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp);
msg->msg_iov = uiov;
if (error != 0)
goto bad;
if (msg->msg_name) {
msg->msg_name = PTRIN(linux_msg.msg_name);
error = bsd_to_linux_sockaddr(sa, &lsa, msg->msg_namelen);
if (error == 0)
error = copyout(lsa, PTRIN(msg->msg_name),
msg->msg_namelen);
free(lsa, M_SONAME);
if (error != 0)
goto bad;
}
error = bsd_to_linux_msghdr(msg, &linux_msg);
if (error != 0)
goto bad;
maxlen = linux_msg.msg_controllen;
linux_msg.msg_controllen = 0;
if (control) {
linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO);
msg->msg_control = mtod(control, struct cmsghdr *);
msg->msg_controllen = control->m_len;
cm = CMSG_FIRSTHDR(msg);
outbuf = PTRIN(linux_msg.msg_control);
outlen = 0;
while (cm != NULL) {
linux_cmsg->cmsg_type =
bsd_to_linux_cmsg_type(cm->cmsg_type);
linux_cmsg->cmsg_level =
bsd_to_linux_sockopt_level(cm->cmsg_level);
if (linux_cmsg->cmsg_type == -1 ||
cm->cmsg_level != SOL_SOCKET) {
error = EINVAL;
goto bad;
}
data = CMSG_DATA(cm);
datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
switch (cm->cmsg_type) {
case SCM_RIGHTS:
if (flags & LINUX_MSG_CMSG_CLOEXEC) {
fds = datalen / sizeof(int);
fdp = data;
for (i = 0; i < fds; i++) {
fd = *fdp++;
(void)kern_fcntl(td, fd,
F_SETFD, FD_CLOEXEC);
}
}
break;
case SCM_CREDS:
/*
* Currently LOCAL_CREDS is never in
* effect for Linux so no need to worry
* about sockcred
*/
if (datalen != sizeof(*cmcred)) {
error = EMSGSIZE;
goto bad;
}
cmcred = (struct cmsgcred *)data;
bzero(&linux_ucred, sizeof(linux_ucred));
linux_ucred.pid = cmcred->cmcred_pid;
linux_ucred.uid = cmcred->cmcred_uid;
linux_ucred.gid = cmcred->cmcred_gid;
data = &linux_ucred;
datalen = sizeof(linux_ucred);
break;
case SCM_TIMESTAMP:
if (datalen != sizeof(struct timeval)) {
error = EMSGSIZE;
goto bad;
}
ftmvl = (struct timeval *)data;
ltmvl.tv_sec = ftmvl->tv_sec;
ltmvl.tv_usec = ftmvl->tv_usec;
data = &ltmvl;
datalen = sizeof(ltmvl);
break;
}
if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) {
if (outlen == 0) {
error = EMSGSIZE;
goto bad;
} else {
linux_msg.msg_flags |= LINUX_MSG_CTRUNC;
m_dispose_extcontrolm(control);
goto out;
}
}
linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen);
error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ);
if (error != 0)
goto bad;
outbuf += L_CMSG_HDRSZ;
error = copyout(data, outbuf, datalen);
if (error != 0)
goto bad;
outbuf += LINUX_CMSG_ALIGN(datalen);
outlen += LINUX_CMSG_LEN(datalen);
cm = CMSG_NXTHDR(msg, cm);
}
linux_msg.msg_controllen = outlen;
}
out:
error = copyout(&linux_msg, msghdr, sizeof(linux_msg));
bad:
if (control != NULL) {
if (error != 0)
m_dispose_extcontrolm(control);
m_freem(control);
}
free(iov, M_IOV);
free(linux_cmsg, M_LINUX);
free(sa, M_SONAME);
return (error);
}
int
linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args)
{
struct msghdr bsd_msg;
return (linux_recvmsg_common(td, args->s, PTRIN(args->msg),
args->flags, &bsd_msg));
}
int
linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args)
{
struct l_mmsghdr *msg;
struct msghdr bsd_msg;
struct l_timespec lts;
struct timespec ts, tts;
l_uint retval;
int error, datagrams;
if (args->timeout) {
error = copyin(args->timeout, &lts, sizeof(struct l_timespec));
if (error != 0)
return (error);
error = linux_to_native_timespec(&ts, &lts);
if (error != 0)
return (error);
getnanotime(&tts);
timespecadd(&tts, &ts, &tts);
}
msg = PTRIN(args->msg);
datagrams = 0;
while (datagrams < args->vlen) {
error = linux_recvmsg_common(td, args->s, &msg->msg_hdr,
args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg);
if (error != 0)
break;
retval = td->td_retval[0];
error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len));
if (error != 0)
break;
++msg;
++datagrams;
/*
* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet.
*/
if (args->flags & LINUX_MSG_WAITFORONE)
args->flags |= LINUX_MSG_DONTWAIT;
/*
* See BUGS section of recvmmsg(2).
*/
if (args->timeout) {
getnanotime(&ts);
timespecsub(&ts, &tts, &ts);
if (!timespecisset(&ts) || ts.tv_sec > 0)
break;
}
/* Out of band data, return right away. */
if (bsd_msg.msg_flags & MSG_OOB)
break;
}
if (error == 0)
td->td_retval[0] = datagrams;
return (error);
}
int
linux_shutdown(struct thread *td, struct linux_shutdown_args *args)
{
return (kern_shutdown(td, args->s, args->how));
}
int
linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
{
l_timeval linux_tv;
struct sockaddr *sa;
struct timeval tv;
socklen_t len;
int error, level, name;
level = linux_to_bsd_sockopt_level(args->level);
switch (level) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(args->optname);
switch (name) {
case SO_RCVTIMEO:
/* FALLTHROUGH */
case SO_SNDTIMEO:
error = copyin(PTRIN(args->optval), &linux_tv,
sizeof(linux_tv));
if (error != 0)
return (error);
tv.tv_sec = linux_tv.tv_sec;
tv.tv_usec = linux_tv.tv_usec;
return (kern_setsockopt(td, args->s, level,
name, &tv, UIO_SYSSPACE, sizeof(tv)));
/* NOTREACHED */
default:
break;
}
break;
case IPPROTO_IP:
if (args->optname == LINUX_IP_RECVERR &&
linux_ignore_ip_recverr) {
/*
* XXX: This is a hack to unbreak DNS resolution
* with glibc 2.30 and above.
*/
return (0);
}
name = linux_to_bsd_ip_sockopt(args->optname);
break;
case IPPROTO_IPV6:
name = linux_to_bsd_ip6_sockopt(args->optname);
break;
case IPPROTO_TCP:
name = linux_to_bsd_tcp_sockopt(args->optname);
break;
default:
name = -1;
break;
}
if (name == -1) {
linux_msg(curthread,
"unsupported setsockopt level %d optname %d",
args->level, args->optname);
return (ENOPROTOOPT);
}
if (name == IPV6_NEXTHOP) {
len = args->optlen;
error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len);
if (error != 0)
return (error);
error = kern_setsockopt(td, args->s, level,
name, sa, UIO_SYSSPACE, len);
free(sa, M_SONAME);
} else {
error = kern_setsockopt(td, args->s, level,
name, PTRIN(args->optval), UIO_USERSPACE, args->optlen);
}
return (error);
}
int
linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
{
l_timeval linux_tv;
struct timeval tv;
socklen_t tv_len, xulen, len;
struct l_sockaddr *lsa;
struct sockaddr *sa;
struct xucred xu;
struct l_ucred lxu;
int error, level, name, newval;
level = linux_to_bsd_sockopt_level(args->level);
switch (level) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(args->optname);
switch (name) {
case SO_RCVTIMEO:
/* FALLTHROUGH */
case SO_SNDTIMEO:
tv_len = sizeof(tv);
error = kern_getsockopt(td, args->s, level,
name, &tv, UIO_SYSSPACE, &tv_len);
if (error != 0)
return (error);
linux_tv.tv_sec = tv.tv_sec;
linux_tv.tv_usec = tv.tv_usec;
return (copyout(&linux_tv, PTRIN(args->optval),
sizeof(linux_tv)));
/* NOTREACHED */
case LOCAL_PEERCRED:
if (args->optlen < sizeof(lxu))
return (EINVAL);
/*
* LOCAL_PEERCRED is not served at the SOL_SOCKET level,
* but by the Unix socket's level 0.
*/
level = 0;
xulen = sizeof(xu);
error = kern_getsockopt(td, args->s, level,
name, &xu, UIO_SYSSPACE, &xulen);
if (error != 0)
return (error);
lxu.pid = xu.cr_pid;
lxu.uid = xu.cr_uid;
lxu.gid = xu.cr_gid;
return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu)));
/* NOTREACHED */
case SO_ERROR:
len = sizeof(newval);
error = kern_getsockopt(td, args->s, level,
name, &newval, UIO_SYSSPACE, &len);
if (error != 0)
return (error);
newval = -SV_ABI_ERRNO(td->td_proc, newval);
return (copyout(&newval, PTRIN(args->optval), len));
/* NOTREACHED */
default:
break;
}
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(args->optname);
break;
case IPPROTO_IPV6:
name = linux_to_bsd_ip6_sockopt(args->optname);
break;
case IPPROTO_TCP:
name = linux_to_bsd_tcp_sockopt(args->optname);
break;
default:
name = -1;
break;
}
if (name == -1) {
linux_msg(curthread,
"unsupported getsockopt level %d optname %d",
args->level, args->optname);
return (EINVAL);
}
if (name == IPV6_NEXTHOP) {
error = copyin(PTRIN(args->optlen), &len, sizeof(len));
if (error != 0)
return (error);
sa = malloc(len, M_SONAME, M_WAITOK);
error = kern_getsockopt(td, args->s, level,
name, sa, UIO_SYSSPACE, &len);
if (error != 0)
goto out;
error = bsd_to_linux_sockaddr(sa, &lsa, len);
if (error == 0)
error = copyout(lsa, PTRIN(args->optval), len);
free(lsa, M_SONAME);
if (error == 0)
error = copyout(&len, PTRIN(args->optlen),
sizeof(len));
out:
free(sa, M_SONAME);
} else {
if (args->optval) {
error = copyin(PTRIN(args->optlen), &len, sizeof(len));
if (error != 0)
return (error);
}
error = kern_getsockopt(td, args->s, level,
name, PTRIN(args->optval), UIO_USERSPACE, &len);
if (error == 0)
error = copyout(&len, PTRIN(args->optlen),
sizeof(len));
}
return (error);
}
static int
linux_sendfile_common(struct thread *td, l_int out, l_int in,
l_loff_t *offset, l_size_t count)
{
off_t bytes_read;
int error;
l_loff_t current_offset;
struct file *fp;
AUDIT_ARG_FD(in);
error = fget_read(td, in, &cap_pread_rights, &fp);
if (error != 0)
return (error);
if (offset != NULL) {
current_offset = *offset;
} else {
error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ?
fo_seek(fp, 0, SEEK_CUR, td) : ESPIPE;
if (error != 0)
goto drop;
current_offset = td->td_uretoff.tdu_off;
}
bytes_read = 0;
/* Linux cannot have 0 count. */
if (count <= 0 || current_offset < 0) {
error = EINVAL;
goto drop;
}
error = fo_sendfile(fp, out, NULL, NULL, current_offset, count,
&bytes_read, 0, td);
if (error != 0)
goto drop;
current_offset += bytes_read;
if (offset != NULL) {
*offset = current_offset;
} else {
error = fo_seek(fp, current_offset, SEEK_SET, td);
if (error != 0)
goto drop;
}
td->td_retval[0] = (ssize_t)bytes_read;
drop:
fdrop(fp, td);
return (error);
}
int
linux_sendfile(struct thread *td, struct linux_sendfile_args *arg)
{
/*
* Differences between FreeBSD and Linux sendfile:
* - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to
* mean send the whole file.) In linux_sendfile given fds are still
* checked for validity when the count is 0.
* - Linux can send to any fd whereas FreeBSD only supports sockets.
* The same restriction follows for linux_sendfile.
* - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr.
* - Linux takes an offset pointer and updates it to the read location.
* FreeBSD takes in an offset and a 'bytes read' parameter which is
* only filled if it isn't NULL. We use this parameter to update the
* offset pointer if it exists.
* - Linux sendfile returns bytes read on success while FreeBSD
* returns 0. We use the 'bytes read' parameter to get this value.
*/
l_loff_t offset64;
l_long offset;
int ret;
int error;
if (arg->offset != NULL) {
error = copyin(arg->offset, &offset, sizeof(offset));
if (error != 0)
return (error);
offset64 = (l_loff_t)offset;
}
ret = linux_sendfile_common(td, arg->out, arg->in,
arg->offset != NULL ? &offset64 : NULL, arg->count);
if (arg->offset != NULL) {
#if defined(__i386__) || defined(__arm__) || \
(defined(__amd64__) && defined(COMPAT_LINUX32))
if (offset64 > INT32_MAX)
return (EOVERFLOW);
#endif
offset = (l_long)offset64;
error = copyout(&offset, arg->offset, sizeof(offset));
if (error != 0)
return (error);
}
return (ret);
}
#if defined(__i386__) || defined(__arm__) || \
(defined(__amd64__) && defined(COMPAT_LINUX32))
int
linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg)
{
l_loff_t offset;
int ret;
int error;
if (arg->offset != NULL) {
error = copyin(arg->offset, &offset, sizeof(offset));
if (error != 0)
return (error);
}
ret = linux_sendfile_common(td, arg->out, arg->in,
arg->offset != NULL ? &offset : NULL, arg->count);
if (arg->offset != NULL) {
error = copyout(&offset, arg->offset, sizeof(offset));
if (error != 0)
return (error);
}
return (ret);
}
/* Argument list sizes for linux_socketcall */
static const unsigned char lxs_args_cnt[] = {
0 /* unused*/, 3 /* socket */,
3 /* bind */, 3 /* connect */,
2 /* listen */, 3 /* accept */,
3 /* getsockname */, 3 /* getpeername */,
4 /* socketpair */, 4 /* send */,
4 /* recv */, 6 /* sendto */,
6 /* recvfrom */, 2 /* shutdown */,
5 /* setsockopt */, 5 /* getsockopt */,
3 /* sendmsg */, 3 /* recvmsg */,
4 /* accept4 */, 5 /* recvmmsg */,
4 /* sendmmsg */, 4 /* sendfile */
};
#define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1)
#define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong))
int
linux_socketcall(struct thread *td, struct linux_socketcall_args *args)
{
l_ulong a[6];
#if defined(__amd64__) && defined(COMPAT_LINUX32)
register_t l_args[6];
#endif
void *arg;
int error;
if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT)
return (EINVAL);
error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what));
if (error != 0)
return (error);
#if defined(__amd64__) && defined(COMPAT_LINUX32)
for (int i = 0; i < lxs_args_cnt[args->what]; ++i)
l_args[i] = a[i];
arg = l_args;
#else
arg = a;
#endif
switch (args->what) {
case LINUX_SOCKET:
return (linux_socket(td, arg));
case LINUX_BIND:
return (linux_bind(td, arg));
case LINUX_CONNECT:
return (linux_connect(td, arg));
case LINUX_LISTEN:
return (linux_listen(td, arg));
case LINUX_ACCEPT:
return (linux_accept(td, arg));
case LINUX_GETSOCKNAME:
return (linux_getsockname(td, arg));
case LINUX_GETPEERNAME:
return (linux_getpeername(td, arg));
case LINUX_SOCKETPAIR:
return (linux_socketpair(td, arg));
case LINUX_SEND:
return (linux_send(td, arg));
case LINUX_RECV:
return (linux_recv(td, arg));
case LINUX_SENDTO:
return (linux_sendto(td, arg));
case LINUX_RECVFROM:
return (linux_recvfrom(td, arg));
case LINUX_SHUTDOWN:
return (linux_shutdown(td, arg));
case LINUX_SETSOCKOPT:
return (linux_setsockopt(td, arg));
case LINUX_GETSOCKOPT:
return (linux_getsockopt(td, arg));
case LINUX_SENDMSG:
return (linux_sendmsg(td, arg));
case LINUX_RECVMSG:
return (linux_recvmsg(td, arg));
case LINUX_ACCEPT4:
return (linux_accept4(td, arg));
case LINUX_RECVMMSG:
return (linux_recvmmsg(td, arg));
case LINUX_SENDMMSG:
return (linux_sendmmsg(td, arg));
case LINUX_SENDFILE:
return (linux_sendfile(td, arg));
}
uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
return (ENOSYS);
}
#endif /* __i386__ || __arm__ || (__amd64__ && COMPAT_LINUX32) */
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