NetBSD/sys/compat/linux/common/linux_socket.c

654 lines
16 KiB
C

/* $NetBSD: linux_socket.c,v 1.21 1999/07/17 22:03:55 jtk Exp $ */
/*-
* Copyright (c) 1995, 1998 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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/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 <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/syscallargs.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>
#include <compat/linux/common/linux_socketcall.h>
#include <compat/linux/common/linux_sockio.h>
#include <compat/linux/linux_syscallargs.h>
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#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.
*/
int linux_to_bsd_domain __P((int));
int linux_to_bsd_sopt_level __P((int));
int linux_to_bsd_so_sockopt __P((int));
int linux_to_bsd_ip_sockopt __P((int));
int linux_to_bsd_tcp_sockopt __P((int));
int linux_to_bsd_udp_sockopt __P((int));
int linux_getifhwaddr __P((struct proc *, register_t *, u_int, void *));
/*
* Convert between Linux and BSD socket domain values
*/
int
linux_to_bsd_domain(ldom)
int ldom;
{
switch (ldom) {
case LINUX_AF_UNSPEC:
return AF_UNSPEC;
case LINUX_AF_UNIX:
return AF_LOCAL;
case LINUX_AF_INET:
return AF_INET;
case LINUX_AF_AX25:
return AF_CCITT;
case LINUX_AF_IPX:
return AF_IPX;
case LINUX_AF_APPLETALK:
return AF_APPLETALK;
case LINUX_AF_X25:
return AF_CCITT;
case LINUX_AF_INET6:
return AF_INET6;
case LINUX_AF_DECnet:
return AF_DECnet;
case LINUX_AF_NETLINK:
return AF_ROUTE;
/* NETROM, BRIDGE, ATMPVC, ROSE, NETBEUI, SECURITY, */
/* pseudo_AF_KEY, PACKET, ASH, ECONET, ATMSVC, SNA */
default:
return -1;
}
}
int
linux_sys_socket(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_socket_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
} */ *uap = v;
struct sys_socket_args bsa;
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;
return sys_socket(p, &bsa, retval);
}
int
linux_sys_socketpair(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_socketpair_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
syscallarg(int *) rsv;
} */ *uap = v;
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(p, &bsa, retval);
}
int
linux_sys_sendto(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_sendto_args /* {
syscallarg(int) s;
syscallarg(void *) msg;
syscallarg(int) len;
syscallarg(int) flags;
syscallarg(sockaddr *) to;
syscallarg(int) tolen;
} */ *uap = v;
struct sys_sendto_args bsa;
SCARG(&bsa, s) = SCARG(uap, s);
SCARG(&bsa, buf) = SCARG(uap, msg);
SCARG(&bsa, len) = SCARG(uap, len);
SCARG(&bsa, flags) = SCARG(uap, flags);
SCARG(&bsa, to) = (void *) SCARG(uap, to);
SCARG(&bsa, tolen) = SCARG(uap, tolen);
return sys_sendto(p, &bsa, retval);
}
int
linux_sys_recvfrom(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_recvfrom_args /* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(int) len;
syscallarg(int) flags;
syscallarg(struct sockaddr *) from;
syscallarg(int *) fromlen;
} */ *uap = v;
struct compat_43_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) = (caddr_t) SCARG(uap, from);
SCARG(&bra, fromlenaddr) = SCARG(uap, fromlen);
return compat_43_sys_recvfrom(p, &bra, retval);
}
/*
* 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(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 NetBSD values.
*/
int
linux_to_bsd_so_sockopt(lopt)
int lopt;
{
switch (lopt) {
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:
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(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;
default:
return -1;
}
}
/*
* Convert Linux TCP level socket option number to NetBSD 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 NetBSD 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_sys_setsockopt(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_setsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) optname;
syscallarg(void *) optval;
syscallarg(int) optlen;
} */ *uap = v;
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);
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(p, &bsa, retval);
}
/*
* getsockopt(2) is very much the same as setsockopt(2) (see above)
*/
int
linux_sys_getsockopt(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_getsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) optname;
syscallarg(void *) optval;
syscallarg(int *) optlen;
} */ *uap = v;
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) = 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(p, &bga, retval);
}
#define IF_NAME_LEN 16
int
linux_getifhwaddr(p, retval, fd, data)
struct proc *p;
register_t *retval;
u_int fd;
void *data;
{
/* Not the full structure, just enough to map what we do here */
struct linux_ifreq {
char if_name[IF_NAME_LEN];
struct osockaddr hwaddr;
} lreq;
struct filedesc *fdp;
struct file *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.
*/
fdp = p->p_fd;
if (fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fp->f_iflags & FIF_WANTCLOSE) != 0)
return (EBADF);
FILE_USE(fp);
if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
error = EBADF;
goto out;
}
error = copyin(data, (caddr_t)&lreq, sizeof(lreq));
if (error)
goto out;
lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */
/*
* Only support finding addresses for "ethX". Should we
* do otherwise? XXX
*/
if (lreq.if_name[0] == 'e' &&
lreq.if_name[1] == 't' &&
lreq.if_name[2] == 'h') {
for (ifnum = 0, index = 3;
lreq.if_name[index] != '\0' && index < IF_NAME_LEN;
index++) {
ifnum *= 10;
ifnum += lreq.if_name[index] - '0';
}
error = EINVAL; /* in case we don't find one */
for (ifp = ifnet.tqh_first, found = 0;
ifp != 0 && !found;
ifp = ifp->if_list.tqe_next) {
memcpy(lreq.if_name, ifp->if_xname,
MIN(IF_NAME_LEN, IFNAMSIZ));
if ((ifa = ifp->if_addrlist.tqh_first) == 0)
/* no addresses on this interface */
continue;
else
for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
sadl = (struct sockaddr_dl *)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((caddr_t)&lreq.hwaddr.sa_data,
LLADDR(sadl),
MIN(sadl->sdl_alen,
sizeof(lreq.hwaddr.sa_data)));
lreq.hwaddr.sa_family =
sadl->sdl_family;
error = copyout((caddr_t)&lreq, data,
sizeof(lreq));
found = 1;
break;
}
}
} else
/* not an "eth*" name */
error = EINVAL;
out:
FILE_UNUSE(fp, p);
return error;
}
#undef IF_NAME_LEN 16
int
linux_ioctl_socket(p, uap, retval)
register struct proc *p;
register struct linux_sys_ioctl_args /* {
syscallarg(int) fd;
syscallarg(u_long) com;
syscallarg(caddr_t) data;
} */ *uap;
register_t *retval;
{
u_long com;
struct sys_ioctl_args ia;
com = SCARG(uap, com);
retval[0] = 0;
switch (com) {
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_SIOCADDMULTI:
SCARG(&ia, com) = SIOCADDMULTI;
break;
case LINUX_SIOCDELMULTI:
SCARG(&ia, com) = SIOCDELMULTI;
break;
case LINUX_SIOCGIFHWADDR:
return linux_getifhwaddr(p, retval, SCARG(uap, fd),
SCARG(uap, data));
default:
return EINVAL;
}
SCARG(&ia, fd) = SCARG(uap, fd);
SCARG(&ia, data) = SCARG(uap, data);
return sys_ioctl(p, &ia, retval);
}
int
linux_sys_connect(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
int error;
register struct sys_connect_args /* {
syscallarg(int) s;
syscallarg(const struct sockaddr *) name;
syscallarg(unsigned int) namelen;
} */ *uap = v;
error = sys_connect (p, v, retval);
if (error == EISCONN) {
struct file *fp;
register struct socket *so;
int s, state, prflags;
/* getsock() will use the descriptor for us */
if (getsock(p->p_fd, SCARG(uap, s), &fp) != 0)
return EISCONN;
s = splsoftnet();
so = (struct socket *)fp->f_data;
state = so->so_state;
prflags = so->so_proto->pr_flags;
splx(s);
FILE_UNUSE(fp, p);
/*
* 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 ((state & SS_NBIO) && (state & SS_ISCONNECTED) &&
(prflags & PR_CONNREQUIRED))
return 0;
}
return error;
}