NetBSD-5.0.2/sys/compat/linux/common/linux_socket.c
/* $NetBSD: linux_socket.c,v 1.98.6.1 2009/06/17 20:15:56 bouyer Exp $ */
/*-
* Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Functions in multiarch:
* linux_sys_socketcall : linux_socketcall.c
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.98.6.1 2009/06/17 20:15:56 bouyer Exp $");
#if defined(_KERNEL_OPT)
#include "opt_inet.h"
#endif /* defined(_KERNEL_OPT) */
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/protosw.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/exec.h>
#include <sys/kauth.h>
#include <sys/syscallargs.h>
#include <sys/ktrace.h>
#include <lib/libkern/libkern.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif
#include <compat/sys/socket.h>
#include <compat/sys/sockio.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_ioctl.h>
#include <compat/linux/common/linux_socket.h>
#if !defined(__alpha__) && !defined(__amd64__)
#include <compat/linux/common/linux_socketcall.h>
#endif
#include <compat/linux/common/linux_sockio.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>
#ifdef DEBUG_LINUX
#define DPRINTF(a) uprintf a
#else
#define DPRINTF(a)
#endif
/*
* The calls in this file are entered either via the linux_socketcall()
* interface or, on the Alpha, as individual syscalls. The
* linux_socketcall function does any massaging of arguments so that all
* the calls in here need not think that they are anything other
* than a normal syscall.
*/
static int linux_to_bsd_domain(int);
static int bsd_to_linux_domain(int);
int linux_to_bsd_sopt_level(int);
int linux_to_bsd_so_sockopt(int);
int linux_to_bsd_ip_sockopt(int);
int linux_to_bsd_tcp_sockopt(int);
int linux_to_bsd_udp_sockopt(int);
int linux_getifconf(struct lwp *, register_t *, void *);
int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *);
static int linux_get_sa(struct lwp *, int, struct mbuf **,
const struct osockaddr *, unsigned int);
static int linux_sa_put(struct osockaddr *osa);
static int linux_to_bsd_msg_flags(int);
static int bsd_to_linux_msg_flags(int);
static const int linux_to_bsd_domain_[LINUX_AF_MAX] = {
AF_UNSPEC,
AF_UNIX,
AF_INET,
AF_CCITT, /* LINUX_AF_AX25 */
AF_IPX,
AF_APPLETALK,
-1, /* LINUX_AF_NETROM */
-1, /* LINUX_AF_BRIDGE */
-1, /* LINUX_AF_ATMPVC */
AF_CCITT, /* LINUX_AF_X25 */
AF_INET6,
-1, /* LINUX_AF_ROSE */
AF_DECnet,
-1, /* LINUX_AF_NETBEUI */
-1, /* LINUX_AF_SECURITY */
pseudo_AF_KEY,
AF_ROUTE, /* LINUX_AF_NETLINK */
-1, /* LINUX_AF_PACKET */
-1, /* LINUX_AF_ASH */
-1, /* LINUX_AF_ECONET */
-1, /* LINUX_AF_ATMSVC */
AF_SNA,
/* rest up to LINUX_AF_MAX-1 is not allocated */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};
static const int bsd_to_linux_domain_[AF_MAX] = {
LINUX_AF_UNSPEC,
LINUX_AF_UNIX,
LINUX_AF_INET,
-1, /* AF_IMPLINK */
-1, /* AF_PUP */
-1, /* AF_CHAOS */
-1, /* AF_NS */
-1, /* AF_ISO */
-1, /* AF_ECMA */
-1, /* AF_DATAKIT */
LINUX_AF_AX25, /* AF_CCITT */
LINUX_AF_SNA,
LINUX_AF_DECnet,
-1, /* AF_DLI */
-1, /* AF_LAT */
-1, /* AF_HYLINK */
LINUX_AF_APPLETALK,
LINUX_AF_NETLINK,
-1, /* AF_LINK */
-1, /* AF_XTP */
-1, /* AF_COIP */
-1, /* AF_CNT */
-1, /* pseudo_AF_RTIP */
LINUX_AF_IPX,
LINUX_AF_INET6,
-1, /* pseudo_AF_PIP */
-1, /* AF_ISDN */
-1, /* AF_NATM */
-1, /* AF_ARP */
LINUX_pseudo_AF_KEY,
-1, /* pseudo_AF_HDRCMPLT */
};
static const struct {
int bfl;
int lfl;
} bsd_to_linux_msg_flags_[] = {
{MSG_OOB, LINUX_MSG_OOB},
{MSG_PEEK, LINUX_MSG_PEEK},
{MSG_DONTROUTE, LINUX_MSG_DONTROUTE},
{MSG_EOR, LINUX_MSG_EOR},
{MSG_TRUNC, LINUX_MSG_TRUNC},
{MSG_CTRUNC, LINUX_MSG_CTRUNC},
{MSG_WAITALL, LINUX_MSG_WAITALL},
{MSG_DONTWAIT, LINUX_MSG_DONTWAIT},
{MSG_BCAST, 0}, /* not supported, clear */
{MSG_MCAST, 0}, /* not supported, clear */
{-1, /* not supp */ LINUX_MSG_PROBE},
{-1, /* not supp */ LINUX_MSG_FIN},
{-1, /* not supp */ LINUX_MSG_SYN},
{-1, /* not supp */ LINUX_MSG_CONFIRM},
{-1, /* not supp */ LINUX_MSG_RST},
{-1, /* not supp */ LINUX_MSG_ERRQUEUE},
{-1, /* not supp */ LINUX_MSG_NOSIGNAL},
{-1, /* not supp */ LINUX_MSG_MORE},
};
/*
* Convert between Linux and BSD socket domain values
*/
static int
linux_to_bsd_domain(int ldom)
{
if (ldom < 0 || ldom >= LINUX_AF_MAX)
return (-1);
return linux_to_bsd_domain_[ldom];
}
/*
* Convert between BSD and Linux socket domain values
*/
static int
bsd_to_linux_domain(int bdom)
{
if (bdom < 0 || bdom >= AF_MAX)
return (-1);
return bsd_to_linux_domain_[bdom];
}
static int
linux_to_bsd_msg_flags(int lflag)
{
int i, lfl, bfl;
int bflag = 0;
if (lflag == 0)
return (0);
for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) {
bfl = bsd_to_linux_msg_flags_[i].bfl;
lfl = bsd_to_linux_msg_flags_[i].lfl;
if (lfl == 0)
continue;
if (lflag & lfl) {
if (bfl < 0)
return (-1);
bflag |= bfl;
}
}
return (bflag);
}
static int
bsd_to_linux_msg_flags(int bflag)
{
int i, lfl, bfl;
int lflag = 0;
if (bflag == 0)
return (0);
for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) {
bfl = bsd_to_linux_msg_flags_[i].bfl;
lfl = bsd_to_linux_msg_flags_[i].lfl;
if (bfl <= 0)
continue;
if (bflag & bfl) {
if (lfl < 0)
return (-1);
lflag |= lfl;
}
}
return (lflag);
}
int
linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval)
{
/* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
} */
struct sys___socket30_args bsa;
int error;
SCARG(&bsa, protocol) = SCARG(uap, protocol);
SCARG(&bsa, type) = SCARG(uap, type);
SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain));
if (SCARG(&bsa, domain) == -1)
return EINVAL;
error = sys___socket30(l, &bsa, retval);
#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 if the sysctl value is set to 1.
*/
if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) {
struct socket *so;
if (fd_getsock(*retval, &so) == 0) {
int val = 0;
/* ignore error */
(void)so_setsockopt(l, so, IPPROTO_IPV6, IPV6_V6ONLY,
&val, sizeof(val));
fd_putfile(*retval);
}
}
#endif
return (error);
}
int
linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval)
{
/* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
syscallarg(int *) rsv;
} */
struct sys_socketpair_args bsa;
SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain));
if (SCARG(&bsa, domain) == -1)
return EINVAL;
SCARG(&bsa, type) = SCARG(uap, type);
SCARG(&bsa, protocol) = SCARG(uap, protocol);
SCARG(&bsa, rsv) = SCARG(uap, rsv);
return sys_socketpair(l, &bsa, retval);
}
int
linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(void *) msg;
syscallarg(int) len;
syscallarg(int) flags;
syscallarg(struct osockaddr *) to;
syscallarg(int) tolen;
} */
struct msghdr msg;
struct iovec aiov;
struct mbuf *nam;
int bflags;
int error;
/* Translate message flags. */
bflags = linux_to_bsd_msg_flags(SCARG(uap, flags));
if (bflags < 0)
/* Some supported flag */
return EINVAL;
msg.msg_flags = 0;
msg.msg_name = NULL;
msg.msg_control = NULL;
if (SCARG(uap, tolen)) {
/* Read in and convert the sockaddr */
error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to),
SCARG(uap, tolen));
if (error)
return (error);
msg.msg_flags |= MSG_NAMEMBUF;
msg.msg_name = nam;
msg.msg_namelen = SCARG(uap, tolen);
}
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
aiov.iov_base = __UNCONST(SCARG(uap, msg));
aiov.iov_len = SCARG(uap, len);
return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval);
}
int
linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(struct msghdr *) msg;
syscallarg(u_int) flags;
} */
struct msghdr msg;
int error;
int bflags;
struct mbuf *nam;
u_int8_t *control;
struct mbuf *ctl_mbuf = NULL;
error = copyin(SCARG(uap, msg), &msg, sizeof(msg));
if (error)
return error;
msg.msg_flags = MSG_IOVUSRSPACE;
/*
* Translate message flags.
*/
bflags = linux_to_bsd_msg_flags(SCARG(uap, flags));
if (bflags < 0)
/* Some supported flag */
return EINVAL;
if (msg.msg_name) {
/* Read in and convert the sockaddr */
error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name,
msg.msg_namelen);
if (error)
return (error);
msg.msg_flags |= MSG_NAMEMBUF;
msg.msg_name = nam;
}
/*
* Handle cmsg if there is any.
*/
if (CMSG_FIRSTHDR(&msg)) {
struct linux_cmsghdr l_cmsg, *l_cc;
struct cmsghdr *cmsg;
ssize_t resid = msg.msg_controllen;
size_t clen, cidx = 0, cspace;
ctl_mbuf = m_get(M_WAIT, MT_CONTROL);
clen = MLEN;
control = mtod(ctl_mbuf, void *);
l_cc = LINUX_CMSG_FIRSTHDR(&msg);
do {
error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg));
if (error)
goto done;
/*
* Sanity check the control message length.
*/
if (l_cmsg.cmsg_len > resid
|| l_cmsg.cmsg_len < sizeof l_cmsg) {
error = EINVAL;
goto done;
}
/*
* Refuse unsupported control messages, and
* translate fields as appropriate.
*/
switch (l_cmsg.cmsg_level) {
case LINUX_SOL_SOCKET:
/* It only differs on some archs */
if (LINUX_SOL_SOCKET != SOL_SOCKET)
l_cmsg.cmsg_level = SOL_SOCKET;
switch(l_cmsg.cmsg_type) {
case LINUX_SCM_RIGHTS:
/* Linux SCM_RIGHTS is same as NetBSD */
break;
default:
/* other types not supported */
error = EINVAL;
goto done;
}
break;
default:
/* pray and leave intact */
break;
}
cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg));
/* Check the buffer is big enough */
if (__predict_false(cidx + cspace > clen)) {
u_int8_t *nc;
clen = cidx + cspace;
if (clen >= PAGE_SIZE) {
error = EINVAL;
goto done;
}
nc = realloc(clen <= MLEN ? NULL : control,
clen, M_TEMP, M_WAITOK);
if (!nc) {
error = ENOMEM;
goto done;
}
if (cidx <= MLEN)
/* Old buffer was in mbuf... */
memcpy(nc, control, cidx);
control = nc;
}
/* Copy header */
cmsg = (void *)&control[cidx];
cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA;
cmsg->cmsg_level = l_cmsg.cmsg_level;
cmsg->cmsg_type = l_cmsg.cmsg_type;
/* Zero are between header and data */
memset(cmsg + 1, 0,
CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg));
/* Copyin the data */
error = copyin(LINUX_CMSG_DATA(l_cc),
CMSG_DATA(control),
l_cmsg.cmsg_len - sizeof(l_cmsg));
if (error)
goto done;
resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len);
cidx += cspace;
} while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0);
/* If we allocated a buffer, attach to mbuf */
if (cidx > MLEN) {
MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL);
ctl_mbuf->m_flags |= M_EXT_RW;
}
control = NULL;
ctl_mbuf->m_len = cidx;
msg.msg_control = ctl_mbuf;
msg.msg_flags |= MSG_CONTROLMBUF;
}
error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval);
/* Freed internally */
ctl_mbuf = NULL;
done:
if (ctl_mbuf != NULL) {
if (control != NULL && control != mtod(ctl_mbuf, void *))
free(control, M_MBUF);
m_free(ctl_mbuf);
}
return (error);
}
int
linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(int) len;
syscallarg(int) flags;
syscallarg(struct osockaddr *) from;
syscallarg(int *) fromlenaddr;
} */
int error;
struct sys_recvfrom_args bra;
SCARG(&bra, s) = SCARG(uap, s);
SCARG(&bra, buf) = SCARG(uap, buf);
SCARG(&bra, len) = SCARG(uap, len);
SCARG(&bra, flags) = SCARG(uap, flags);
SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from);
SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr);
if ((error = sys_recvfrom(l, &bra, retval)))
return (error);
if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from))))
return (error);
return (0);
}
static int
linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control)
{
int dlen, error = 0;
struct cmsghdr *cmsg;
struct linux_cmsghdr linux_cmsg;
struct mbuf *m;
char *q, *q_end;
if (mp->msg_controllen <= 0 || control == 0) {
mp->msg_controllen = 0;
free_control_mbuf(l, control, control);
return 0;
}
q = (char *)mp->msg_control;
q_end = q + mp->msg_controllen;
for (m = control; m != NULL; ) {
cmsg = mtod(m, struct cmsghdr *);
/*
* Fixup cmsg. We handle two things:
* 0. different sizeof cmsg_len.
* 1. different values for level/type on some archs
* 2. different alignment of CMSG_DATA on some archs
*/
linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA;
linux_cmsg.cmsg_level = cmsg->cmsg_level;
linux_cmsg.cmsg_type = cmsg->cmsg_type;
dlen = q_end - q;
if (linux_cmsg.cmsg_len > dlen) {
/* Not enough room for the parameter */
dlen -= sizeof linux_cmsg;
if (dlen <= 0)
/* Discard if header wont fit */
break;
mp->msg_flags |= MSG_CTRUNC;
if (linux_cmsg.cmsg_level == SOL_SOCKET
&& linux_cmsg.cmsg_type == SCM_RIGHTS)
/* Do not truncate me ... */
break;
} else
dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg;
switch (linux_cmsg.cmsg_level) {
case SOL_SOCKET:
linux_cmsg.cmsg_level = LINUX_SOL_SOCKET;
switch (linux_cmsg.cmsg_type) {
case SCM_RIGHTS:
/* Linux SCM_RIGHTS is same as NetBSD */
break;
default:
/* other types not supported */
error = EINVAL;
goto done;
}
/* machine dependant ! */
break;
default:
/* pray and leave intact */
break;
}
/* There can be padding between the header and data... */
error = copyout(&linux_cmsg, q, sizeof *cmsg);
if (error != 0) {
error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg,
dlen);
}
if (error != 0) {
/* We must free all the SCM_RIGHTS */
m = control;
break;
}
m = m->m_next;
if (m == NULL || q + LINUX_CMSG_ALIGN(dlen) > q_end) {
q += dlen;
break;
}
q += LINUX_CMSG_ALIGN(dlen);
}
done:
free_control_mbuf(l, control, m);
mp->msg_controllen = q - (char *)mp->msg_control;
return error;
}
int
linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(struct msghdr *) msg;
syscallarg(u_int) flags;
} */
struct msghdr msg;
int error;
struct mbuf *from, *control;
error = copyin(SCARG(uap, msg), &msg, sizeof(msg));
if (error)
return (error);
msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags));
if (msg.msg_flags < 0) {
/* Some unsupported flag */
return (EINVAL);
}
msg.msg_flags |= MSG_IOVUSRSPACE;
error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from,
msg.msg_control != NULL ? &control : NULL, retval);
if (error != 0)
return error;
if (msg.msg_control != NULL)
error = linux_copyout_msg_control(l, &msg, control);
if (error == 0 && from != 0) {
mtod(from, struct osockaddr *)->sa_family =
bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family);
error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0,
from);
} else
msg.msg_namelen = 0;
if (from != NULL)
m_free(from);
if (error == 0) {
msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags);
if (msg.msg_flags < 0)
/* Some flag unsupported by Linux */
error = EINVAL;
else
error = copyout(&msg, SCARG(uap, msg), sizeof(msg));
}
return (error);
}
/*
* Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET
* is different, the rest matches IPPROTO_* on both systems.
*/
int
linux_to_bsd_sopt_level(int llevel)
{
switch (llevel) {
case LINUX_SOL_SOCKET:
return SOL_SOCKET;
case LINUX_SOL_IP:
return IPPROTO_IP;
case LINUX_SOL_TCP:
return IPPROTO_TCP;
case LINUX_SOL_UDP:
return IPPROTO_UDP;
default:
return -1;
}
}
/*
* Convert Linux socket level socket option numbers to NetBSD values.
*/
int
linux_to_bsd_so_sockopt(int lopt)
{
switch (lopt) {
case LINUX_SO_DEBUG:
return SO_DEBUG;
case LINUX_SO_REUSEADDR:
/*
* Linux does not implement SO_REUSEPORT, but allows reuse of a
* host:port pair through SO_REUSEADDR even if the address is not a
* multicast-address. Effectively, this means that we should use
* SO_REUSEPORT to allow Linux applications to not exit with
* EADDRINUSE
*/
return SO_REUSEPORT;
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:
return SO_SNDBUF;
case LINUX_SO_RCVBUF:
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_PRIORITY:
case LINUX_SO_NO_CHECK:
default:
return -1;
}
}
/*
* Convert Linux IP level socket option number to NetBSD values.
*/
int
linux_to_bsd_ip_sockopt(int lopt)
{
switch (lopt) {
case LINUX_IP_TOS:
return IP_TOS;
case LINUX_IP_TTL:
return IP_TTL;
case LINUX_IP_MULTICAST_TTL:
return IP_MULTICAST_TTL;
case LINUX_IP_MULTICAST_LOOP:
return IP_MULTICAST_LOOP;
case LINUX_IP_MULTICAST_IF:
return IP_MULTICAST_IF;
case LINUX_IP_ADD_MEMBERSHIP:
return IP_ADD_MEMBERSHIP;
case LINUX_IP_DROP_MEMBERSHIP:
return IP_DROP_MEMBERSHIP;
default:
return -1;
}
}
/*
* Convert Linux TCP level socket option number to NetBSD values.
*/
int
linux_to_bsd_tcp_sockopt(int lopt)
{
switch (lopt) {
case LINUX_TCP_NODELAY:
return TCP_NODELAY;
case LINUX_TCP_MAXSEG:
return TCP_MAXSEG;
default:
return -1;
}
}
/*
* Convert Linux UDP level socket option number to NetBSD values.
*/
int
linux_to_bsd_udp_sockopt(int lopt)
{
switch (lopt) {
default:
return -1;
}
}
/*
* Another reasonably straightforward function: setsockopt(2).
* The level and option numbers are converted; the values passed
* are not (yet) converted, the ones currently implemented don't
* need conversion, as they are the same on both systems.
*/
int
linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) optname;
syscallarg(void *) optval;
syscallarg(int) optlen;
} */
struct sys_setsockopt_args bsa;
int name;
SCARG(&bsa, s) = SCARG(uap, s);
SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level));
SCARG(&bsa, val) = SCARG(uap, optval);
SCARG(&bsa, valsize) = SCARG(uap, optlen);
/*
* Linux supports only SOL_SOCKET for AF_LOCAL domain sockets
* and returns EOPNOTSUPP for other levels
*/
if (SCARG(&bsa, level) != SOL_SOCKET) {
struct socket *so;
int error, family;
/* fd_getsock() will use the descriptor for us */
if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0)
return error;
family = so->so_proto->pr_domain->dom_family;
fd_putfile(SCARG(&bsa, s));
if (family == AF_LOCAL)
return EOPNOTSUPP;
}
switch (SCARG(&bsa, level)) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(SCARG(uap, optname));
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(SCARG(uap, optname));
break;
case IPPROTO_TCP:
name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname));
break;
case IPPROTO_UDP:
name = linux_to_bsd_udp_sockopt(SCARG(uap, optname));
break;
default:
return EINVAL;
}
if (name == -1)
return EINVAL;
SCARG(&bsa, name) = name;
return sys_setsockopt(l, &bsa, retval);
}
/*
* getsockopt(2) is very much the same as setsockopt(2) (see above)
*/
int
linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) optname;
syscallarg(void *) optval;
syscallarg(int *) optlen;
} */
struct sys_getsockopt_args bga;
int name;
SCARG(&bga, s) = SCARG(uap, s);
SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level));
SCARG(&bga, val) = SCARG(uap, optval);
SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen);
switch (SCARG(&bga, level)) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(SCARG(uap, optname));
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(SCARG(uap, optname));
break;
case IPPROTO_TCP:
name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname));
break;
case IPPROTO_UDP:
name = linux_to_bsd_udp_sockopt(SCARG(uap, optname));
break;
default:
return EINVAL;
}
if (name == -1)
return EINVAL;
SCARG(&bga, name) = name;
return sys_getsockopt(l, &bga, retval);
}
int
linux_getifconf(struct lwp *l, register_t *retval, void *data)
{
struct linux_ifreq ifr, *ifrp;
struct ifconf *ifc = data;
struct ifnet *ifp;
struct ifaddr *ifa;
struct sockaddr *sa;
struct osockaddr *osa;
int space, error = 0;
const int sz = (int)sizeof(ifr);
ifrp = (struct linux_ifreq *)ifc->ifc_req;
if (ifrp == NULL)
space = 0;
else
space = ifc->ifc_len;
IFNET_FOREACH(ifp) {
(void)strncpy(ifr.ifr_name, ifp->if_xname,
sizeof(ifr.ifr_name));
if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0')
return ENAMETOOLONG;
if (IFADDR_EMPTY(ifp))
continue;
IFADDR_FOREACH(ifa, ifp) {
sa = ifa->ifa_addr;
if (sa->sa_family != AF_INET ||
sa->sa_len > sizeof(*osa))
continue;
memcpy(&ifr.ifr_addr, sa, sa->sa_len);
osa = (struct osockaddr *)&ifr.ifr_addr;
osa->sa_family = sa->sa_family;
if (space >= sz) {
error = copyout(&ifr, ifrp, sz);
if (error != 0)
return error;
ifrp++;
}
space -= sz;
}
}
if (ifrp != NULL)
ifc->ifc_len -= space;
else
ifc->ifc_len = -space;
return 0;
}
int
linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd,
void *data)
{
/* Not the full structure, just enough to map what we do here */
struct linux_ifreq lreq;
file_t *fp;
struct ifaddr *ifa;
struct ifnet *ifp;
struct sockaddr_dl *sadl;
int error, found;
int index, ifnum;
/*
* We can't emulate this ioctl by calling sys_ioctl() to run
* SIOCGIFCONF, because the user buffer is not of the right
* type to take those results. We can't use kernel buffers to
* receive the results, as the implementation of sys_ioctl()
* and ifconf() [which implements SIOCGIFCONF] use
* copyin()/copyout() which will fail on kernel addresses.
*
* So, we must duplicate code from sys_ioctl() and ifconf(). Ugh.
*/
if ((fp = fd_getfile(fd)) == NULL)
return (EBADF);
KERNEL_LOCK(1, NULL);
if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
error = EBADF;
goto out;
}
error = copyin(data, &lreq, sizeof(lreq));
if (error)
goto out;
lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */
/*
* Try real interface name first, then fake "ethX"
*/
found = 0;
IFNET_FOREACH(ifp) {
if (found)
break;
if (strcmp(lreq.ifr_name, ifp->if_xname))
/* not this interface */
continue;
found=1;
if (IFADDR_EMPTY(ifp)) {
error = ENODEV;
goto out;
}
IFADDR_FOREACH(ifa, ifp) {
sadl = satosdl(ifa->ifa_addr);
/* only return ethernet addresses */
/* XXX what about FDDI, etc. ? */
if (sadl->sdl_family != AF_LINK ||
sadl->sdl_type != IFT_ETHER)
continue;
memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl),
MIN(sadl->sdl_alen,
sizeof(lreq.ifr_hwaddr.sa_data)));
lreq.ifr_hwaddr.sa_family =
sadl->sdl_family;
error = copyout(&lreq, data, sizeof(lreq));
goto out;
}
}
if (strncmp(lreq.ifr_name, "eth", 3) == 0) {
for (ifnum = 0, index = 3;
lreq.ifr_name[index] != '\0' && index < LINUX_IFNAMSIZ;
index++) {
ifnum *= 10;
ifnum += lreq.ifr_name[index] - '0';
}
error = EINVAL; /* in case we don't find one */
found = 0;
IFNET_FOREACH(ifp) {
if (found)
break;
memcpy(lreq.ifr_name, ifp->if_xname,
MIN(LINUX_IFNAMSIZ, IFNAMSIZ));
IFADDR_FOREACH(ifa, ifp) {
sadl = satosdl(ifa->ifa_addr);
/* only return ethernet addresses */
/* XXX what about FDDI, etc. ? */
if (sadl->sdl_family != AF_LINK ||
sadl->sdl_type != IFT_ETHER)
continue;
if (ifnum--)
/* not the reqested iface */
continue;
memcpy(&lreq.ifr_hwaddr.sa_data,
CLLADDR(sadl),
MIN(sadl->sdl_alen,
sizeof(lreq.ifr_hwaddr.sa_data)));
lreq.ifr_hwaddr.sa_family =
sadl->sdl_family;
error = copyout(&lreq, data, sizeof(lreq));
found = 1;
break;
}
}
} else {
/* unknown interface, not even an "eth*" name */
error = ENODEV;
}
out:
KERNEL_UNLOCK_ONE(NULL);
fd_putfile(fd);
return error;
}
int
linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(u_long) com;
syscallarg(void *) data;
} */
u_long com;
int error = 0, isdev = 0, dosys = 1;
struct sys_ioctl_args ia;
file_t *fp;
struct vnode *vp;
int (*ioctlf)(file_t *, u_long, void *);
struct ioctl_pt pt;
if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
return (EBADF);
if (fp->f_type == DTYPE_VNODE) {
vp = (struct vnode *)fp->f_data;
isdev = vp->v_type == VCHR;
}
/*
* Don't try to interpret socket ioctl calls that are done
* on a device filedescriptor, just pass them through, to
* emulate Linux behaviour. Use PTIOCLINUX so that the
* device will only handle these if it's prepared to do
* so, to avoid unexpected things from happening.
*/
if (isdev) {
dosys = 0;
ioctlf = fp->f_ops->fo_ioctl;
pt.com = SCARG(uap, com);
pt.data = SCARG(uap, data);
error = ioctlf(fp, PTIOCLINUX, &pt);
/*
* XXX hack: if the function returns EJUSTRETURN,
* it has stuffed a sysctl return value in pt.data.
*/
if (error == EJUSTRETURN) {
retval[0] = (register_t)pt.data;
error = 0;
}
goto out;
}
com = SCARG(uap, com);
retval[0] = 0;
switch (com) {
case LINUX_SIOCGIFCONF:
error = linux_getifconf(l, retval, SCARG(uap, data));
dosys = 0;
break;
case LINUX_SIOCGIFFLAGS:
SCARG(&ia, com) = OSIOCGIFFLAGS;
break;
case LINUX_SIOCSIFFLAGS:
SCARG(&ia, com) = OSIOCSIFFLAGS;
break;
case LINUX_SIOCGIFADDR:
SCARG(&ia, com) = OOSIOCGIFADDR;
break;
case LINUX_SIOCGIFDSTADDR:
SCARG(&ia, com) = OOSIOCGIFDSTADDR;
break;
case LINUX_SIOCGIFBRDADDR:
SCARG(&ia, com) = OOSIOCGIFBRDADDR;
break;
case LINUX_SIOCGIFNETMASK:
SCARG(&ia, com) = OOSIOCGIFNETMASK;
break;
case LINUX_SIOCADDMULTI:
SCARG(&ia, com) = OSIOCADDMULTI;
break;
case LINUX_SIOCDELMULTI:
SCARG(&ia, com) = OSIOCDELMULTI;
break;
case LINUX_SIOCGIFHWADDR:
error = linux_getifhwaddr(l, retval, SCARG(uap, fd),
SCARG(uap, data));
dosys = 0;
break;
default:
error = EINVAL;
}
out:
fd_putfile(SCARG(uap, fd));
if (error ==0 && dosys) {
SCARG(&ia, fd) = SCARG(uap, fd);
SCARG(&ia, data) = SCARG(uap, data);
error = sys_ioctl(curlwp, &ia, retval);
}
return error;
}
int
linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(const struct sockaddr *) name;
syscallarg(int) namelen;
} */
int error;
struct mbuf *nam;
error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name),
SCARG(uap, namelen));
if (error)
return (error);
error = do_sys_connect(l, SCARG(uap, s), nam);
if (error == EISCONN) {
struct socket *so;
int state, prflags, nbio;
/* fd_getsock() will use the descriptor for us */
if (fd_getsock(SCARG(uap, s), &so) != 0)
return EISCONN;
solock(so);
state = so->so_state;
nbio = so->so_nbio;
prflags = so->so_proto->pr_flags;
sounlock(so);
fd_putfile(SCARG(uap, s));
/*
* We should only let this call succeed once per
* non-blocking connect; however we don't have
* a convenient place to keep that state..
*/
if (nbio && (state & SS_ISCONNECTED) &&
(prflags & PR_CONNREQUIRED))
return 0;
}
return (error);
}
int
linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(const struct osockaddr *) name;
syscallarg(int) namelen;
} */
int error;
struct mbuf *nam;
error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name),
SCARG(uap, namelen));
if (error)
return (error);
return do_sys_bind(l, SCARG(uap, s), nam);
}
int
linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval)
{
/* {
syscallarg(int) fdes;
syscallarg(void *) asa;
syscallarg(int *) alen;
} */
int error;
if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0)
return (error);
if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa))))
return (error);
return (0);
}
int
linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval)
{
/* {
syscallarg(int) fdes;
syscallarg(void *) asa;
syscallarg(int *) alen;
} */
int error;
if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0)
return (error);
if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa))))
return (error);
return (0);
}
/*
* Copy the osockaddr structure pointed to by osa to mbuf, adjust
* family and convert to sockaddr.
*/
static int
linux_get_sa(struct lwp *l, int s, struct mbuf **mp,
const struct osockaddr *osa, unsigned int salen)
{
int error, bdom;
struct sockaddr *sa;
struct osockaddr *kosa;
struct mbuf *m;
if (salen == 1 || salen > UCHAR_MAX) {
DPRINTF(("bad osa=%p salen=%d\n", osa, salen));
return EINVAL;
}
/* We'll need the address in an mbuf later, so copy into one here */
m = m_get(M_WAIT, MT_SONAME);
if (salen > MLEN)
MEXTMALLOC(m, salen, M_WAITOK);
m->m_len = salen;
if (salen == 0) {
*mp = m;
return 0;
}
kosa = mtod(m, void *);
if ((error = copyin(osa, kosa, salen))) {
DPRINTF(("error %d copying osa %p len %d\n",
error, osa, salen));
goto bad;
}
ktrkuser("linux sockaddr", kosa, salen);
bdom = linux_to_bsd_domain(kosa->sa_family);
if (bdom == -1) {
DPRINTF(("bad linux family=%d\n", kosa->sa_family));
error = EINVAL;
goto bad;
}
/*
* If the family is unspecified, use address family of the socket.
* This avoid triggering strict family checks in netinet/in_pcb.c et.al.
*/
if (bdom == AF_UNSPEC) {
struct socket *so;
/* fd_getsock() will use the descriptor for us */
if ((error = fd_getsock(s, &so)) != 0)
goto bad;
bdom = so->so_proto->pr_domain->dom_family;
fd_putfile(s);
DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom));
}
#ifdef INET6
/*
* Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
* which lacks the scope id compared with RFC2553 one. If we detect
* the situation, reject the address and write a message to system log.
*
* Still accept addresses for which the scope id is not used.
*/
if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa;
if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) &&
(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) ||
IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) ||
IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) ||
IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
struct proc *p = l->l_proc;
int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1;
log(LOG_DEBUG,
"pid %d (%s), uid %d: obsolete pre-RFC2553 "
"sockaddr_in6 rejected",
p->p_pid, p->p_comm, uid);
error = EINVAL;
goto bad;
}
salen = sizeof (struct sockaddr_in6);
sin6->sin6_scope_id = 0;
}
#endif
if (bdom == AF_INET)
salen = sizeof(struct sockaddr_in);
sa = (struct sockaddr *) kosa;
sa->sa_family = bdom;
sa->sa_len = salen;
m->m_len = salen;
ktrkuser("new sockaddr", kosa, salen);
#ifdef DEBUG_LINUX
DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len));
for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++)
DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom]));
DPRINTF(("\n"));
#endif
*mp = m;
return 0;
bad:
m_free(m);
return error;
}
static int
linux_sa_put(struct osockaddr *osa)
{
struct sockaddr sa;
struct osockaddr *kosa;
int error, bdom, len;
/*
* Only read/write the sockaddr family and length part, the rest is
* not changed.
*/
len = sizeof(sa.sa_len) + sizeof(sa.sa_family);
error = copyin(osa, &sa, len);
if (error)
return (error);
bdom = bsd_to_linux_domain(sa.sa_family);
if (bdom == -1)
return (EINVAL);
/* Note: we convert from sockaddr to osockaddr here, too */
kosa = (struct osockaddr *) &sa;
kosa->sa_family = bdom;
error = copyout(kosa, osa, len);
if (error)
return (error);
return (0);
}
#ifndef __amd64__
int
linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(int) len;
syscallarg(int) flags;
} */
struct sys_recvfrom_args bra;
SCARG(&bra, s) = SCARG(uap, s);
SCARG(&bra, buf) = SCARG(uap, buf);
SCARG(&bra, len) = (size_t) SCARG(uap, len);
SCARG(&bra, flags) = SCARG(uap, flags);
SCARG(&bra, from) = NULL;
SCARG(&bra, fromlenaddr) = NULL;
return (sys_recvfrom(l, &bra, retval));
}
int
linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(int) len;
syscallarg(int) flags;
} */
struct sys_sendto_args bsa;
SCARG(&bsa, s) = SCARG(uap, s);
SCARG(&bsa, buf) = SCARG(uap, buf);
SCARG(&bsa, len) = SCARG(uap, len);
SCARG(&bsa, flags) = SCARG(uap, flags);
SCARG(&bsa, to) = NULL;
SCARG(&bsa, tolen) = 0;
return (sys_sendto(l, &bsa, retval));
}
#endif
int
linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(struct osockaddr *) name;
syscallarg(int *) anamelen;
} */
int error;
struct sys_accept_args baa;
SCARG(&baa, s) = SCARG(uap, s);
SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name);
SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen);
if ((error = sys_accept(l, &baa, retval)))
return (error);
if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name))))
return (error);
return (0);
}