/* $OpenBSD: linux_socket.c,v 1.36 2007/06/06 09:59:21 henning Exp $ */
/* $NetBSD: linux_socket.c,v 1.14 1996/04/05 00:01:50 christos Exp $ */
/*
* Copyright (c) 1995 Frank van der Linden
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project
* by Frank van der Linden
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/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/selinfo.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/syscallargs.h>
#include <compat/linux/linux_types.h>
#include <compat/linux/linux_util.h>
#include <compat/linux/linux_signal.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/linux/linux_ioctl.h>
#include <compat/linux/linux_socket.h>
#include <compat/linux/linux_socketcall.h>
#include <compat/linux/linux_sockio.h>
/*
* All the calls in this file are entered via one common system
* call in Linux, represented here by linux_socketcall()
* Arguments for the various calls are on the user stack. A pointer
* to them is the only thing that is passed. It is up to the various
* calls to copy them in themselves. To make it look better, they
* are copied to structures.
*/
static int linux_to_bsd_domain (int);
static int bsd_to_linux_domain(int);
int linux_socket(struct proc *, void *, register_t *);
int linux_bind(struct proc *, void *, register_t *);
int linux_connect(struct proc *, void *, register_t *);
int linux_listen(struct proc *, void *, register_t *);
int linux_accept(struct proc *, void *, register_t *);
int linux_getsockname(struct proc *, void *, register_t *);
int linux_getpeername(struct proc *, void *, register_t *);
int linux_socketpair(struct proc *, void *, register_t *);
int linux_send(struct proc *, void *, register_t *);
int linux_recv(struct proc *, void *, register_t *);
int linux_sendto(struct proc *, void *, register_t *);
int linux_recvfrom(struct proc *, void *, register_t *);
int linux_shutdown(struct proc *, void *, register_t *);
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_setsockopt(struct proc *, void *, register_t *);
int linux_getsockopt(struct proc *, void *, register_t *);
int linux_recvmsg(struct proc *, void *, register_t *);
int linux_sendmsg(struct proc *, void *, register_t *);
int linux_check_hdrincl(struct proc *, int, register_t *, caddr_t *);
int linux_sendto_hdrincl(struct proc *, struct sys_sendto_args *,
register_t *, caddr_t *);
int linux_sa_get(struct proc *, caddr_t *, struct sockaddr **,
const struct osockaddr *, int *);
int linux_sa_put(struct osockaddr *);
static const int linux_to_bsd_domain_[LINUX_AF_MAX] = {
AF_UNSPEC,
AF_UNIX,
AF_INET,
-1, /* LINUX_AF_AX25 */
-1, /* IPX */
AF_APPLETALK,
-1, /* LINUX_AF_NETROM */
-1, /* LINUX_AF_BRIDGE */
-1, /* LINUX_AF_ATMPVC */
-1, /* LINUX_AF_X25 */
AF_INET6,
-1, /* LINUX_AF_ROSE */
AF_DECnet,
-1, /* LINUX_AF_NETBEUI */
-1, /* LINUX_AF_SECURITY */
-1, /* 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 */
-1, /* AF_CCITT */
-1, /* LINUX_AF_SNA */
-1, /* LINUX_AF_DECnet */
-1, /* AF_DLI */
-1, /* AF_LAT */
-1, /* AF_HYLINK */
LINUX_AF_APPLETALK,
-1, /* 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 */
-1, /* LINUX_pseudo_AF_KEY */
-1, /* pseudo_AF_HDRCMPLT */
};
/*
* Convert between Linux and BSD socket domain values
*/
static int
linux_to_bsd_domain(ldom)
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(bdom)
int bdom;
{
if (bdom < 0 || bdom >= AF_MAX)
return (-1);
return bsd_to_linux_domain_[bdom];
}
int
linux_socket(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_socket_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
} */ *uap = v;
struct linux_socket_args lsa;
struct sys_socket_args bsa;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa)))
return error;
SCARG(&bsa, protocol) = lsa.protocol;
SCARG(&bsa, type) = lsa.type;
SCARG(&bsa, domain) = linux_to_bsd_domain(lsa.domain);
if (SCARG(&bsa, domain) == -1)
return EINVAL;
return sys_socket(p, &bsa, retval);
}
int
linux_bind(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_bind_args /* {
syscallarg(int) s;
syscallarg(struct sockaddr *) name;
syscallarg(int) namelen;
} */ *uap = v;
struct linux_bind_args lba;
struct sys_bind_args bba;
int error;
int namlen;
if ((error = copyin((caddr_t) uap, (caddr_t) &lba, sizeof lba)))
return error;
SCARG(&bba, s) = lba.s;
namlen = lba.namelen;
if (lba.name) {
struct sockaddr *sa;
caddr_t sg = stackgap_init(p->p_emul);
error = linux_sa_get(p, &sg, &sa, lba.name, &namlen);
if (error)
return (error);
SCARG(&bba, name) = sa;
} else
SCARG(&bba, name) = NULL;
SCARG(&bba, namelen) = namlen;
return sys_bind(p, &bba, retval);
}
int
linux_connect(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_connect_args /* {
syscallarg(int) s;
syscallarg(struct osockaddr *) name;
syscallarg(int) namelen;
} */ *uap = v;
struct linux_connect_args lca;
struct sys_connect_args bca;
struct sockaddr *sa;
caddr_t sg = stackgap_init(p->p_emul);
int namlen;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lca, sizeof lca)))
return error;
namlen = lca.namelen;
error = linux_sa_get(p, &sg, &sa, lca.name, &namlen);
if (error)
return (error);
SCARG(&bca, s) = lca.s;
SCARG(&bca, name) = sa;
SCARG(&bca, namelen) = (unsigned int)namlen;
error = sys_connect(p, &bca, retval);
if (error == EISCONN) {
struct sys_getsockopt_args bga;
#if 0
struct sys_fcntl_args fca;
#endif
void *status, *statusl;
int stat, statl = sizeof stat;
#if 0
SCARG(&fca, fd) = lca.s;
SCARG(&fca, cmd) = F_GETFL;
SCARG(&fca, arg) = 0;
if (sys_fcntl(p, &fca, retval) == -1 ||
(*retval & O_NONBLOCK) == 0)
return error;
#endif
status = stackgap_alloc(&sg, sizeof stat);
statusl = stackgap_alloc(&sg, sizeof statusl);
if ((error = copyout(&statl, statusl, sizeof statl)))
return error;
SCARG(&bga, s) = lca.s;
SCARG(&bga, level) = SOL_SOCKET;
SCARG(&bga, name) = SO_ERROR;
SCARG(&bga, val) = status;
SCARG(&bga, avalsize) = statusl;
error = sys_getsockopt(p, &bga, retval);
if (error)
return error;
if ((error = copyin(status, &stat, sizeof stat)))
return error;
return stat;
}
return error;
}
int
linux_listen(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_listen_args /* {
syscallarg(int) s;
syscallarg(int) backlog;
} */ *uap = v;
struct linux_listen_args lla;
struct sys_listen_args bla;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lla, sizeof lla)))
return error;
SCARG(&bla, s) = lla.s;
SCARG(&bla, backlog) = lla.backlog;
return sys_listen(p, &bla, retval);
}
int
linux_accept(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_accept_args /* {
syscallarg(int) s;
syscallarg(struct sockaddr *) addr;
syscallarg(int *) namelen;
} */ *uap = v;
struct linux_accept_args laa;
struct compat_43_sys_accept_args baa;
struct sys_fcntl_args fca;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &laa, sizeof laa)))
return error;
SCARG(&baa, s) = laa.s;
SCARG(&baa, name) = (caddr_t) laa.addr;
SCARG(&baa, anamelen) = laa.namelen;
error = compat_43_sys_accept(p, &baa, retval);
if (error)
return (error);
/*
* linux appears not to copy flags from the parent socket to the
* accepted one, so we must clear the flags in the new descriptor.
* Ignore any errors, because we already have an open fd.
*/
SCARG(&fca, fd) = *retval;
SCARG(&fca, cmd) = F_SETFL;
SCARG(&fca, arg) = 0;
(void)sys_fcntl(p, &fca, retval);
*retval = SCARG(&fca, fd);
return (0);
}
int
linux_getsockname(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_getsockname_args /* {
syscallarg(int) s;
syscallarg(caddr_t) addr;
syscallarg(int *) namelen;
} */ *uap = v;
struct linux_getsockname_args lga;
struct sys_getsockname_args bga;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lga, sizeof lga)))
return error;
SCARG(&bga, fdes) = lga.s;
SCARG(&bga, asa) = (struct sockaddr *) lga.addr;
SCARG(&bga, alen) = lga.namelen;
error = sys_getsockname(p, &bga, retval);
if (error)
return (error);
if ((error = linux_sa_put((struct osockaddr *)lga.addr)))
return (error);
return (0);
}
int
linux_getpeername(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_getpeername_args /* {
syscallarg(int) s;
syscallarg(struct sockaddr *) addr;
syscallarg(int *) namelen;
} */ *uap = v;
struct linux_getpeername_args lga;
struct sys_getpeername_args bga;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lga, sizeof lga)))
return error;
SCARG(&bga, fdes) = lga.s;
SCARG(&bga, asa) = (struct sockaddr *) lga.addr;
SCARG(&bga, alen) = lga.namelen;
error = sys_getpeername(p, &bga, retval);
if (error)
return (error);
if ((error = linux_sa_put((struct osockaddr *)lga.addr)))
return (error);
return (0);
}
int
linux_socketpair(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_socketpair_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
syscallarg(int *) rsv;
} */ *uap = v;
struct linux_socketpair_args lsa;
struct sys_socketpair_args bsa;
int error;
if ((error = copyin((caddr_t) uap, &lsa, sizeof lsa)))
return error;
SCARG(&bsa, domain) = linux_to_bsd_domain(lsa.domain);
if (SCARG(&bsa, domain) == -1)
return EINVAL;
SCARG(&bsa, type) = lsa.type;
SCARG(&bsa, protocol) = lsa.protocol;
SCARG(&bsa, rsv) = lsa.rsv;
return sys_socketpair(p, &bsa, retval);
}
int
linux_send(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_send_args /* {
syscallarg(int) s;
syscallarg(void *) msg;
syscallarg(int) len;
syscallarg(int) flags;
} */ *uap = v;
struct linux_send_args lsa;
struct compat_43_sys_send_args bsa;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa)))
return error;
SCARG(&bsa, s) = lsa.s;
SCARG(&bsa, buf) = lsa.msg;
SCARG(&bsa, len) = lsa.len;
SCARG(&bsa, flags) = lsa.flags;
return compat_43_sys_send(p, &bsa, retval);
}
int
linux_recv(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_recv_args /* {
syscallarg(int) s;
syscallarg(void *) msg;
syscallarg(int) len;
syscallarg(int) flags;
} */ *uap = v;
struct linux_recv_args lra;
struct compat_43_sys_recv_args bra;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lra, sizeof lra)))
return error;
SCARG(&bra, s) = lra.s;
SCARG(&bra, buf) = lra.msg;
SCARG(&bra, len) = lra.len;
SCARG(&bra, flags) = lra.flags;
return compat_43_sys_recv(p, &bra, retval);
}
int
linux_check_hdrincl(p, fd, retval, sgp)
struct proc *p;
int fd;
register_t *retval;
caddr_t *sgp;
{
struct sys_getsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int *avalsize;
} */ gsa;
int error;
caddr_t val;
int *valsize;
int size_val = sizeof val;
int optval;
val = stackgap_alloc(sgp, sizeof(optval));
valsize = stackgap_alloc(sgp, sizeof(size_val));
if ((error = copyout(&size_val, valsize, sizeof(size_val))))
return (error);
SCARG(&gsa, s) = fd;
SCARG(&gsa, level) = IPPROTO_IP;
SCARG(&gsa, name) = IP_HDRINCL;
SCARG(&gsa, val) = val;
SCARG(&gsa, avalsize) = valsize;
if ((error = sys_getsockopt(p, &gsa, retval)))
return (error);
if ((error = copyin(val, &optval, sizeof(optval))))
return (error);
return (optval == 0);
}
/*
* 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)
* and be as small as possible to minimize copying overhead.
*/
#define linux_ip_copysize 8
int
linux_sendto_hdrincl(p, bsa, retval, sgp)
struct proc *p;
struct sys_sendto_args *bsa;
register_t *retval;
caddr_t *sgp;
{
struct sys_sendmsg_args ssa;
struct ip *packet, rpacket;
struct msghdr *msg, rmsg;
struct iovec *iov, riov[2];
int error;
/* Check the packet isn't too small before we mess with it */
if (SCARG(bsa, len) < linux_ip_copysize)
return EINVAL;
/*
* Tweaking the user buffer in place would be bad manners.
* We create a corrected IP header with just the needed length,
* then use an iovec to glue it to the rest of the user packet
* when calling sendmsg().
*/
packet = (struct ip *)stackgap_alloc(sgp, linux_ip_copysize);
msg = (struct msghdr *)stackgap_alloc(sgp, sizeof(*msg));
iov = (struct iovec *)stackgap_alloc(sgp, sizeof(*iov)*2);
/* Make a copy of the beginning of the packet to be sent */
if ((error = copyin(SCARG(bsa, buf), (caddr_t)&rpacket,
linux_ip_copysize)))
return error;
/* Convert fields from Linux to BSD raw IP socket format */
rpacket.ip_len = SCARG(bsa, len);
error = copyout(&rpacket, packet, linux_ip_copysize);
if (error)
return (error);
riov[0].iov_base = (char *)packet;
riov[0].iov_len = linux_ip_copysize;
riov[1].iov_base = (caddr_t)SCARG(bsa, buf) + linux_ip_copysize;
riov[1].iov_len = SCARG(bsa, len) - linux_ip_copysize;
error = copyout(&riov[0], iov, sizeof(riov));
if (error)
return (error);
/* Prepare the msghdr and iovec structures describing the new packet */
rmsg.msg_name = (void *)SCARG(bsa, to);
rmsg.msg_namelen = SCARG(bsa, tolen);
rmsg.msg_iov = iov;
rmsg.msg_iovlen = 2;
rmsg.msg_control = NULL;
rmsg.msg_controllen = 0;
rmsg.msg_flags = 0;
error = copyout(&riov[0], iov, sizeof(riov));
if (error)
return (error);
SCARG(&ssa, s) = SCARG(bsa, s);
SCARG(&ssa, msg) = msg;
SCARG(&ssa, flags) = SCARG(bsa, flags);
return sys_sendmsg(p, &ssa, retval);
}
int
linux_sendto(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sendto_args /* {
syscallarg(int) s;
syscallarg(void *) msg;
syscallarg(int) len;
syscallarg(int) flags;
syscallarg(osockaddr *) to;
syscallarg(int) tolen;
} */ *uap = v;
struct linux_sendto_args lsa;
struct sys_sendto_args bsa;
int error;
int tolen;
caddr_t sg = stackgap_init(p->p_emul);
if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa)))
return error;
SCARG(&bsa, s) = lsa.s;
SCARG(&bsa, buf) = lsa.msg;
SCARG(&bsa, len) = lsa.len;
SCARG(&bsa, flags) = lsa.flags;
tolen = lsa.tolen;
if (lsa.to) {
struct sockaddr *sa;
if ((error = linux_sa_get(p, &sg, &sa, lsa.to, &tolen)))
return (error);
SCARG(&bsa, to) = sa;
} else
SCARG(&bsa, to) = NULL;
SCARG(&bsa, tolen) = tolen;
if (linux_check_hdrincl(p, lsa.s, retval, &sg) == 0)
return linux_sendto_hdrincl(p, &bsa, retval, &sg);
return sys_sendto(p, &bsa, retval);
}
int
linux_recvfrom(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_recvfrom_args /* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(int) len;
syscallarg(int) flags;
syscallarg(struct osockaddr *) from;
syscallarg(int *) fromlen;
} */ *uap = v;
struct linux_recvfrom_args lra;
struct sys_recvfrom_args bra;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lra, sizeof lra)))
return error;
SCARG(&bra, s) = lra.s;
SCARG(&bra, buf) = lra.buf;
SCARG(&bra, len) = lra.len;
SCARG(&bra, flags) = lra.flags;
SCARG(&bra, from) = (struct sockaddr *) lra.from;
SCARG(&bra, fromlenaddr) = lra.fromlen;
if ((error = sys_recvfrom(p, &bra, retval)))
return (error);
if (lra.from && (error = linux_sa_put(lra.from)))
return (error);
return (0);
}
int
linux_shutdown(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_shutdown_args /* {
syscallarg(int) s;
syscallarg(int) how;
} */ *uap = v;
struct linux_shutdown_args lsa;
struct sys_shutdown_args bsa;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa)))
return error;
SCARG(&bsa, s) = lsa.s;
SCARG(&bsa, how) = lsa.how;
return sys_shutdown(p, &bsa, retval);
}
/*
* Convert socket option level from Linux to OpenBSD value. Only SOL_SOCKET
* is different, the rest matches IPPROTO_* on both systems.
*/
int
linux_to_bsd_sopt_level(llevel)
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 OpenBSD values.
*/
int
linux_to_bsd_so_sockopt(lopt)
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 OpenBSD values.
*/
int
linux_to_bsd_ip_sockopt(lopt)
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;
case LINUX_IP_HDRINCL:
return IP_HDRINCL;
default:
return -1;
}
}
/*
* Convert Linux TCP level socket option number to OpenBSD values.
*/
int
linux_to_bsd_tcp_sockopt(lopt)
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 OpenBSD values.
*/
int
linux_to_bsd_udp_sockopt(lopt)
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_setsockopt(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_setsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) optname;
syscallarg(void *) optval;
syscallarg(int) optlen;
} */ *uap = v;
struct linux_setsockopt_args lsa;
struct sys_setsockopt_args bsa;
int error, name;
if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa)))
return error;
SCARG(&bsa, s) = lsa.s;
SCARG(&bsa, level) = linux_to_bsd_sopt_level(lsa.level);
SCARG(&bsa, val) = lsa.optval;
SCARG(&bsa, valsize) = lsa.optlen;
switch (SCARG(&bsa, level)) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(lsa.optname);
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(lsa.optname);
break;
case IPPROTO_TCP:
name = linux_to_bsd_tcp_sockopt(lsa.optname);
break;
case IPPROTO_UDP:
name = linux_to_bsd_udp_sockopt(lsa.optname);
break;
default:
return EINVAL;
}
if (name == -1)
return EINVAL;
SCARG(&bsa, name) = name;
return sys_setsockopt(p, &bsa, retval);
}
/*
* getsockopt(2) is very much the same as setsockopt(2) (see above)
*/
int
linux_getsockopt(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_getsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) optname;
syscallarg(void *) optval;
syscallarg(int) *optlen;
} */ *uap = v;
struct linux_getsockopt_args lga;
struct sys_getsockopt_args bga;
int error, name;
if ((error = copyin((caddr_t) uap, (caddr_t) &lga, sizeof lga)))
return error;
SCARG(&bga, s) = lga.s;
SCARG(&bga, level) = linux_to_bsd_sopt_level(lga.level);
SCARG(&bga, val) = lga.optval;
SCARG(&bga, avalsize) = lga.optlen;
switch (SCARG(&bga, level)) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(lga.optname);
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(lga.optname);
break;
case IPPROTO_TCP:
name = linux_to_bsd_tcp_sockopt(lga.optname);
break;
case IPPROTO_UDP:
name = linux_to_bsd_udp_sockopt(lga.optname);
break;
default:
return EINVAL;
}
if (name == -1)
return EINVAL;
SCARG(&bga, name) = name;
return sys_getsockopt(p, &bga, retval);
}
int
linux_recvmsg(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_recvmsg_args /* {
syscallarg(int) s;
syscallarg(caddr_t) msg;
syscallarg(int) flags;
} */ *uap = v;
struct linux_recvmsg_args lla;
struct sys_recvmsg_args bla;
struct msghdr msg;
int error;
if ((error = copyin((caddr_t) uap, (caddr_t) &lla, sizeof lla)))
return error;
SCARG(&bla, s) = lla.s;
SCARG(&bla, msg) = (struct msghdr *)lla.msg;
SCARG(&bla, flags) = lla.flags;
error = sys_recvmsg(p, &bla, retval);
if (error)
return (error);
error = copyin(lla.msg, (caddr_t)&msg, sizeof(msg));
if (!error && msg.msg_name && msg.msg_namelen > 2)
error = linux_sa_put(msg.msg_name);
return (error);
}
int
linux_sendmsg(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sendmsg_args /* {
syscallarg(int) s;
syscallarg(struct msghdr *) msg;
syscallarg(int) flags;
} */ *uap = v;
struct linux_sendmsg_args lla;
struct sys_sendmsg_args bla;
struct msghdr msg, *nmsg = NULL;
int error;
caddr_t control;
int level;
if ((error = copyin((caddr_t) uap, (caddr_t) &lla, sizeof lla)))
return error;
if ((error = copyin(lla.msg, (caddr_t) &msg, sizeof(msg))))
return (error);
if (msg.msg_name) {
struct sockaddr *sa;
caddr_t sg = stackgap_init(p->p_emul);
nmsg = (struct msghdr *)stackgap_alloc(&sg,
sizeof(struct msghdr));
if (!nmsg)
return (ENOMEM);
error = linux_sa_get(p, &sg, &sa,
(struct osockaddr *)msg.msg_name, &msg.msg_namelen);
if (error)
return (error);
msg.msg_name = (struct sockaddr *)sa;
if ((error = copyout(&msg, nmsg, sizeof(struct msghdr))))
return (error);
lla.msg = nmsg;
}
SCARG(&bla, s) = lla.s;
SCARG(&bla, msg) = lla.msg;
SCARG(&bla, flags) = lla.flags;
error = copyin(lla.msg->msg_control, &control, sizeof(caddr_t));
if (error)
return error;
if (control == NULL)
goto done;
error = copyin(&((struct cmsghdr *)control)->cmsg_level,
&level, sizeof(int));
if (error)
return error;
if (level == 1) {
/*
* Linux thinks that SOL_SOCKET is 1; we know that it's really
* 0xffff, of course.
*/
level = SOL_SOCKET;
/*
* XXX should use stack gap!
* We don't because the control header is variable length
* up to 2048 bytes, and there's only 512 bytes of gap.
*/
error = copyout(&level, &((struct cmsghdr *)control)->
cmsg_level, sizeof(int));
if (error)
return error;
}
done:
error = sys_sendmsg(p, &bla, retval);
/* replace level, just in case somebody cares. */
if (level == SOL_SOCKET) {
level = 1;
/* don't worry about the error */
copyout(&level, &((struct cmsghdr *)control)->cmsg_level,
sizeof(int));
}
return (error);
}
/*
* Copy the osockaddr structure pointed to by osa to kernel, adjust
* family and convert to sockaddr, allocate stackgap and put the
* the converted structure there, address on stackgap returned in sap.
*/
int
linux_sa_get(p, sgp, sap, osa, osalen)
struct proc *p;
caddr_t *sgp;
struct sockaddr **sap;
const struct osockaddr *osa;
int *osalen;
{
int error=0, bdom;
struct sockaddr *sa, *usa;
struct osockaddr *kosa;
int alloclen;
#ifdef INET6
int oldv6size;
struct sockaddr_in6 *sin6;
#endif
if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) {
return (EINVAL);
}
alloclen = *osalen;
#ifdef INET6
oldv6size = 0;
/*
* Check for old (pre-RFC2553) sockaddr_in6. We may accept it
* if it's a v4-mapped address, so reserve the proper space
* for it.
*/
if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) {
alloclen = sizeof (struct sockaddr_in6);
oldv6size = 1;
}
#endif
kosa = (struct osockaddr *) malloc(alloclen, M_TEMP, M_WAITOK);
if ((error = copyin(osa, (caddr_t) kosa, *osalen))) {
goto out;
}
bdom = linux_to_bsd_domain(kosa->sa_family);
if (bdom == -1) {
error = EINVAL;
goto out;
}
#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.
*
* Still accept addresses for which the scope id is not used.
*/
if (oldv6size && bdom == AF_INET6) {
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))) {
sin6->sin6_scope_id = 0;
} else {
error = EINVAL;
goto out;
}
} else
#endif
if (bdom == AF_INET) {
alloclen = sizeof(struct sockaddr_in);
}
sa = (struct sockaddr *) kosa;
sa->sa_family = bdom;
sa->sa_len = alloclen;
usa = (struct sockaddr *) stackgap_alloc(sgp, alloclen);
if (!usa) {
error = ENOMEM;
goto out;
}
if ((error = copyout(sa, usa, alloclen))) {
goto out;
}
*sap = usa;
out:
*osalen = alloclen;
free(kosa, M_TEMP);
return (error);
}
int
linux_sa_put(osa)
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((caddr_t) osa, (caddr_t) &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);
}
/*
* Entry point to all Linux socket calls. Just check which call to
* make and take appropriate action.
*/
int
linux_sys_socketcall(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_socketcall_args /* {
syscallarg(int) what;
syscallarg(void *) args;
} */ *uap = v;
switch (SCARG(uap, what)) {
case LINUX_SYS_socket:
return linux_socket(p, SCARG(uap, args), retval);
case LINUX_SYS_bind:
return linux_bind(p, SCARG(uap, args), retval);
case LINUX_SYS_connect:
return linux_connect(p, SCARG(uap, args), retval);
case LINUX_SYS_listen:
return linux_listen(p, SCARG(uap, args), retval);
case LINUX_SYS_accept:
return linux_accept(p, SCARG(uap, args), retval);
case LINUX_SYS_getsockname:
return linux_getsockname(p, SCARG(uap, args), retval);
case LINUX_SYS_getpeername:
return linux_getpeername(p, SCARG(uap, args), retval);
case LINUX_SYS_socketpair:
return linux_socketpair(p, SCARG(uap, args), retval);
case LINUX_SYS_send:
return linux_send(p, SCARG(uap, args), retval);
case LINUX_SYS_recv:
return linux_recv(p, SCARG(uap, args), retval);
case LINUX_SYS_sendto:
return linux_sendto(p, SCARG(uap, args), retval);
case LINUX_SYS_recvfrom:
return linux_recvfrom(p, SCARG(uap, args), retval);
case LINUX_SYS_shutdown:
return linux_shutdown(p, SCARG(uap, args), retval);
case LINUX_SYS_setsockopt:
return linux_setsockopt(p, SCARG(uap, args), retval);
case LINUX_SYS_getsockopt:
return linux_getsockopt(p, SCARG(uap, args), retval);
case LINUX_SYS_sendmsg:
return linux_sendmsg(p, SCARG(uap, args), retval);
case LINUX_SYS_recvmsg:
return linux_recvmsg(p, SCARG(uap, args), retval);
default:
return ENOSYS;
}
}
int
linux_ioctl_socket(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_ioctl_args /* {
syscallarg(int) fd;
syscallarg(u_long) com;
syscallarg(caddr_t) data;
} */ *uap = v;
u_long com;
struct sys_ioctl_args ia;
struct file *fp;
struct filedesc *fdp;
struct vnode *vp;
int (*ioctlf)(struct file *, u_long, caddr_t, struct proc *);
struct ioctl_pt pt;
int error = 0, isdev = 0, dosys = 1;
fdp = p->p_fd;
if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
return (EBADF);
FREF(fp);
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, (caddr_t)&pt, p);
/*
* 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_FIOSETOWN:
SCARG(&ia, com) = FIOSETOWN;
break;
case LINUX_SIOCSPGRP:
SCARG(&ia, com) = SIOCSPGRP;
break;
case LINUX_FIOGETOWN:
SCARG(&ia, com) = FIOGETOWN;
break;
case LINUX_SIOCGPGRP:
SCARG(&ia, com) = SIOCGPGRP;
break;
case LINUX_SIOCATMARK:
SCARG(&ia, com) = SIOCATMARK;
break;
#if 0
case LINUX_SIOCGSTAMP:
SCARG(&ia, com) = SIOCGSTAMP;
break;
#endif
case LINUX_SIOCGIFCONF:
SCARG(&ia, com) = OSIOCGIFCONF;
break;
case LINUX_SIOCGIFFLAGS:
SCARG(&ia, com) = SIOCGIFFLAGS;
break;
case LINUX_SIOCGIFADDR:
SCARG(&ia, com) = OSIOCGIFADDR;
break;
case LINUX_SIOCGIFDSTADDR:
SCARG(&ia, com) = OSIOCGIFDSTADDR;
break;
case LINUX_SIOCGIFBRDADDR:
SCARG(&ia, com) = OSIOCGIFBRDADDR;
break;
case LINUX_SIOCGIFNETMASK:
SCARG(&ia, com) = OSIOCGIFNETMASK;
break;
case LINUX_SIOCGIFMETRIC:
SCARG(&ia, com) = SIOCGIFMETRIC;
break;
case LINUX_SIOCGIFMTU:
SCARG(&ia, com) = SIOCGIFMTU;
break;
case LINUX_SIOCADDMULTI:
SCARG(&ia, com) = SIOCADDMULTI;
break;
case LINUX_SIOCDELMULTI:
SCARG(&ia, com) = SIOCDELMULTI;
break;
case LINUX_SIOCGIFHWADDR: {
struct linux_ifreq *ifr = (struct linux_ifreq *)SCARG(uap, data);
struct sockaddr_dl *sdl;
struct ifnet *ifp;
struct ifaddr *ifa;
/*
* Note that we don't actually respect the name in the ifreq
* structure, as Linux interface names are all different.
*/
TAILQ_FOREACH(ifp, &ifnet, if_list) {
if (ifp->if_type != IFT_ETHER)
continue;
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) {
if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
(sdl->sdl_family == AF_LINK) &&
(sdl->sdl_type == IFT_ETHER)) {
error = copyout(LLADDR(sdl),
(caddr_t)&ifr->ifr_hwaddr.sa_data,
LINUX_IFHWADDRLEN);
dosys = 0;
goto out;
}
}
}
error = ENOENT;
break;
}
default:
error = EINVAL;
}
out:
if (error == 0 && dosys) {
SCARG(&ia, fd) = SCARG(uap, fd);
SCARG(&ia, data) = SCARG(uap, data);
error = sys_ioctl(p, &ia, retval);
}
FRELE(fp);
return (error);
}
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