freebsd-dev/sys/i386/linux/linux_socket.c
1999-08-28 01:08:13 +00:00

856 lines
21 KiB
C

/*-
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough 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.
*
* $FreeBSD$
*/
/* XXX we use functions that might not exist. */
#include "opt_compat.h"
#ifndef COMPAT_43
#error "Unable to compile Linux-emulator due to missing COMPAT_43 option!"
#endif
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <i386/linux/linux.h>
#include <i386/linux/linux_proto.h>
#include <i386/linux/linux_util.h>
static int
linux_to_bsd_domain(int domain)
{
switch (domain) {
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;
default:
return -1;
}
}
static int
linux_to_bsd_sockopt_level(int level)
{
switch (level) {
case LINUX_SOL_SOCKET:
return SOL_SOCKET;
default:
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;
default:
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:
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;
}
}
/* Return 0 if IP_HDRINCL is set of the given socket, not 0 otherwise */
static int
linux_check_hdrincl(struct proc *p, int s)
{
struct getsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int *avalsize;
} */ bsd_args;
int error;
caddr_t sg, val, valsize;
int size_val = sizeof val;
int optval;
sg = stackgap_init();
val = stackgap_alloc(&sg, sizeof(int));
valsize = stackgap_alloc(&sg, sizeof(int));
if ((error=copyout(&size_val, valsize, sizeof(size_val))))
return error;
bsd_args.s = s;
bsd_args.level = IPPROTO_IP;
bsd_args.name = IP_HDRINCL;
bsd_args.val = val;
bsd_args.avalsize = (int *)valsize;
if ((error=getsockopt(p, &bsd_args)))
return error;
if ((error=copyin(val, &optval, sizeof(optval))))
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 proc *p, struct sendto_args *bsd_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)
* and be as small as possible to minimize copying overhead.
*/
#define linux_ip_copysize 8
caddr_t sg;
struct ip *packet;
struct msghdr *msg;
struct iovec *iov;
int error;
struct sendmsg_args /* {
int s;
caddr_t msg;
int flags;
} */ sendmsg_args;
/* Check the packet isn't too small before we mess with it */
if (bsd_args->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().
*/
sg = stackgap_init();
packet = (struct ip *)stackgap_alloc(&sg, linux_ip_copysize);
msg = (struct msghdr *)stackgap_alloc(&sg, sizeof(*msg));
iov = (struct iovec *)stackgap_alloc(&sg, sizeof(*iov)*2);
/* Make a copy of the beginning of the packet to be sent */
if ((error = copyin(bsd_args->buf, (caddr_t)packet, linux_ip_copysize)))
return error;
/* Convert fields from Linux to BSD raw IP socket format */
packet->ip_len = bsd_args->len;
packet->ip_off = ntohs(packet->ip_off);
/* Prepare the msghdr and iovec structures describing the new packet */
msg->msg_name = bsd_args->to;
msg->msg_namelen = bsd_args->tolen;
msg->msg_iov = iov;
msg->msg_iovlen = 2;
msg->msg_control = NULL;
msg->msg_controllen = 0;
msg->msg_flags = 0;
iov[0].iov_base = (char *)packet;
iov[0].iov_len = linux_ip_copysize;
iov[1].iov_base = (char *)(bsd_args->buf) + linux_ip_copysize;
iov[1].iov_len = bsd_args->len - linux_ip_copysize;
sendmsg_args.s = bsd_args->s;
sendmsg_args.msg = (caddr_t)msg;
sendmsg_args.flags = bsd_args->flags;
return sendmsg(p, &sendmsg_args);
}
struct linux_socket_args {
int domain;
int type;
int protocol;
};
static int
linux_socket(struct proc *p, struct linux_socket_args *args)
{
struct linux_socket_args linux_args;
struct socket_args /* {
int domain;
int type;
int protocol;
} */ bsd_args;
int error;
int retval_socket;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.protocol = linux_args.protocol;
bsd_args.type = linux_args.type;
bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
if (bsd_args.domain == -1)
return EINVAL;
retval_socket = socket(p, &bsd_args);
if (bsd_args.type == SOCK_RAW
&& (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0)
&& bsd_args.domain == AF_INET
&& retval_socket >= 0) {
/* It's a raw IP socket: set the IP_HDRINCL option. */
struct setsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int valsize;
} */ bsd_setsockopt_args;
caddr_t sg;
int *hdrincl;
sg = stackgap_init();
hdrincl = (int *)stackgap_alloc(&sg, sizeof(*hdrincl));
*hdrincl = 1;
bsd_setsockopt_args.s = p->p_retval[0];
bsd_setsockopt_args.level = IPPROTO_IP;
bsd_setsockopt_args.name = IP_HDRINCL;
bsd_setsockopt_args.val = (caddr_t)hdrincl;
bsd_setsockopt_args.valsize = sizeof(*hdrincl);
/* We ignore any error returned by setsockopt() */
setsockopt(p, &bsd_setsockopt_args);
/* Copy back the return value from socket() */
p->p_retval[0] = bsd_setsockopt_args.s;
}
return retval_socket;
}
struct linux_bind_args {
int s;
struct sockaddr *name;
int namelen;
};
static int
linux_bind(struct proc *p, struct linux_bind_args *args)
{
struct linux_bind_args linux_args;
struct bind_args /* {
int s;
caddr_t name;
int namelen;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.name = (caddr_t)linux_args.name;
bsd_args.namelen = linux_args.namelen;
return bind(p, &bsd_args);
}
struct linux_connect_args {
int s;
struct sockaddr * name;
int namelen;
};
static int
linux_connect(struct proc *p, struct linux_connect_args *args)
{
struct linux_connect_args linux_args;
struct connect_args /* {
int s;
caddr_t name;
int namelen;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.name = (caddr_t)linux_args.name;
bsd_args.namelen = linux_args.namelen;
error = connect(p, &bsd_args);
if (error == EISCONN) {
/*
* 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.
*/
struct fcntl_args /* {
int fd;
int cmd;
int arg;
} */ bsd_fcntl_args;
struct getsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int *avalsize;
} */ bsd_getsockopt_args;
void *status, *statusl;
int stat, statl = sizeof stat;
caddr_t sg;
/* Check for non-blocking */
bsd_fcntl_args.fd = linux_args.s;
bsd_fcntl_args.cmd = F_GETFL;
bsd_fcntl_args.arg = 0;
error = fcntl(p, &bsd_fcntl_args);
if (error == 0 && (p->p_retval[0] & O_NONBLOCK)) {
sg = stackgap_init();
status = stackgap_alloc(&sg, sizeof stat);
statusl = stackgap_alloc(&sg, sizeof statusl);
if ((error = copyout(&statl, statusl, sizeof statl)))
return error;
bsd_getsockopt_args.s = linux_args.s;
bsd_getsockopt_args.level = SOL_SOCKET;
bsd_getsockopt_args.name = SO_ERROR;
bsd_getsockopt_args.val = status;
bsd_getsockopt_args.avalsize = statusl;
error = getsockopt(p, &bsd_getsockopt_args);
if (error)
return error;
if ((error = copyin(status, &stat, sizeof stat)))
return error;
p->p_retval[0] = stat;
return 0;
}
}
return error;
}
struct linux_listen_args {
int s;
int backlog;
};
static int
linux_listen(struct proc *p, struct linux_listen_args *args)
{
struct linux_listen_args linux_args;
struct listen_args /* {
int s;
int backlog;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.backlog = linux_args.backlog;
return listen(p, &bsd_args);
}
struct linux_accept_args {
int s;
struct sockaddr *addr;
int *namelen;
};
static int
linux_accept(struct proc *p, struct linux_accept_args *args)
{
struct linux_accept_args linux_args;
struct accept_args /* {
int s;
caddr_t name;
int *anamelen;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.name = (caddr_t)linux_args.addr;
bsd_args.anamelen = linux_args.namelen;
return oaccept(p, &bsd_args);
}
struct linux_getsockname_args {
int s;
struct sockaddr *addr;
int *namelen;
};
static int
linux_getsockname(struct proc *p, struct linux_getsockname_args *args)
{
struct linux_getsockname_args linux_args;
struct getsockname_args /* {
int fdes;
caddr_t asa;
int *alen;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.fdes = linux_args.s;
bsd_args.asa = (caddr_t) linux_args.addr;
bsd_args.alen = linux_args.namelen;
return ogetsockname(p, &bsd_args);
}
struct linux_getpeername_args {
int s;
struct sockaddr *addr;
int *namelen;
};
static int
linux_getpeername(struct proc *p, struct linux_getpeername_args *args)
{
struct linux_getpeername_args linux_args;
struct ogetpeername_args /* {
int fdes;
caddr_t asa;
int *alen;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.fdes = linux_args.s;
bsd_args.asa = (caddr_t) linux_args.addr;
bsd_args.alen = linux_args.namelen;
return ogetpeername(p, &bsd_args);
}
struct linux_socketpair_args {
int domain;
int type;
int protocol;
int *rsv;
};
static int
linux_socketpair(struct proc *p, struct linux_socketpair_args *args)
{
struct linux_socketpair_args linux_args;
struct socketpair_args /* {
int domain;
int type;
int protocol;
int *rsv;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.domain = linux_to_bsd_domain(linux_args.domain);
if (bsd_args.domain == -1)
return EINVAL;
bsd_args.type = linux_args.type;
bsd_args.protocol = linux_args.protocol;
bsd_args.rsv = linux_args.rsv;
return socketpair(p, &bsd_args);
}
struct linux_send_args {
int s;
void *msg;
int len;
int flags;
};
static int
linux_send(struct proc *p, struct linux_send_args *args)
{
struct linux_send_args linux_args;
struct osend_args /* {
int s;
caddr_t buf;
int len;
int flags;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.buf = linux_args.msg;
bsd_args.len = linux_args.len;
bsd_args.flags = linux_args.flags;
return osend(p, &bsd_args);
}
struct linux_recv_args {
int s;
void *msg;
int len;
int flags;
};
static int
linux_recv(struct proc *p, struct linux_recv_args *args)
{
struct linux_recv_args linux_args;
struct orecv_args /* {
int s;
caddr_t buf;
int len;
int flags;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.buf = linux_args.msg;
bsd_args.len = linux_args.len;
bsd_args.flags = linux_args.flags;
return orecv(p, &bsd_args);
}
struct linux_sendto_args {
int s;
void *msg;
int len;
int flags;
caddr_t to;
int tolen;
};
static int
linux_sendto(struct proc *p, struct linux_sendto_args *args)
{
struct linux_sendto_args linux_args;
struct sendto_args /* {
int s;
caddr_t buf;
size_t len;
int flags;
caddr_t to;
int tolen;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.buf = linux_args.msg;
bsd_args.len = linux_args.len;
bsd_args.flags = linux_args.flags;
bsd_args.to = linux_args.to;
bsd_args.tolen = linux_args.tolen;
if (linux_check_hdrincl(p, linux_args.s) == 0)
/* IP_HDRINCL set, tweak the packet before sending */
return linux_sendto_hdrincl(p, &bsd_args);
return sendto(p, &bsd_args);
}
struct linux_recvfrom_args {
int s;
void *buf;
int len;
int flags;
caddr_t from;
int *fromlen;
};
static int
linux_recvfrom(struct proc *p, struct linux_recvfrom_args *args)
{
struct linux_recvfrom_args linux_args;
struct recvfrom_args /* {
int s;
caddr_t buf;
size_t len;
int flags;
caddr_t from;
int *fromlenaddr;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.buf = linux_args.buf;
bsd_args.len = linux_args.len;
bsd_args.flags = linux_args.flags;
bsd_args.from = linux_args.from;
bsd_args.fromlenaddr = linux_args.fromlen;
return orecvfrom(p, &bsd_args);
}
struct linux_shutdown_args {
int s;
int how;
};
static int
linux_shutdown(struct proc *p, struct linux_shutdown_args *args)
{
struct linux_shutdown_args linux_args;
struct shutdown_args /* {
int s;
int how;
} */ bsd_args;
int error;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.how = linux_args.how;
return shutdown(p, &bsd_args);
}
struct linux_setsockopt_args {
int s;
int level;
int optname;
void *optval;
int optlen;
};
static int
linux_setsockopt(struct proc *p, struct linux_setsockopt_args *args)
{
struct linux_setsockopt_args linux_args;
struct setsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int valsize;
} */ bsd_args;
int error, name;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
switch (bsd_args.level) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(linux_args.optname);
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(linux_args.optname);
break;
case IPPROTO_TCP:
/* Linux TCP option values match BSD's */
name = linux_args.optname;
break;
default:
return EINVAL;
}
if (name == -1)
return EINVAL;
bsd_args.name = name;
bsd_args.val = linux_args.optval;
bsd_args.valsize = linux_args.optlen;
return setsockopt(p, &bsd_args);
}
struct linux_getsockopt_args {
int s;
int level;
int optname;
void *optval;
int *optlen;
};
static int
linux_getsockopt(struct proc *p, struct linux_getsockopt_args *args)
{
struct linux_getsockopt_args linux_args;
struct getsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int *avalsize;
} */ bsd_args;
int error, name;
if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args))))
return error;
bsd_args.s = linux_args.s;
bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level);
switch (bsd_args.level) {
case SOL_SOCKET:
name = linux_to_bsd_so_sockopt(linux_args.optname);
break;
case IPPROTO_IP:
name = linux_to_bsd_ip_sockopt(linux_args.optname);
break;
case IPPROTO_TCP:
/* Linux TCP option values match BSD's */
name = linux_args.optname;
break;
default:
return EINVAL;
}
if (name == -1)
return EINVAL;
bsd_args.name = name;
bsd_args.val = linux_args.optval;
bsd_args.avalsize = linux_args.optlen;
return getsockopt(p, &bsd_args);
}
int
linux_socketcall(struct proc *p, struct linux_socketcall_args *args)
{
switch (args->what) {
case LINUX_SOCKET:
return linux_socket(p, args->args);
case LINUX_BIND:
return linux_bind(p, args->args);
case LINUX_CONNECT:
return linux_connect(p, args->args);
case LINUX_LISTEN:
return linux_listen(p, args->args);
case LINUX_ACCEPT:
return linux_accept(p, args->args);
case LINUX_GETSOCKNAME:
return linux_getsockname(p, args->args);
case LINUX_GETPEERNAME:
return linux_getpeername(p, args->args);
case LINUX_SOCKETPAIR:
return linux_socketpair(p, args->args);
case LINUX_SEND:
return linux_send(p, args->args);
case LINUX_RECV:
return linux_recv(p, args->args);
case LINUX_SENDTO:
return linux_sendto(p, args->args);
case LINUX_RECVFROM:
return linux_recvfrom(p, args->args);
case LINUX_SHUTDOWN:
return linux_shutdown(p, args->args);
case LINUX_SETSOCKOPT:
return linux_setsockopt(p, args->args);
case LINUX_GETSOCKOPT:
return linux_getsockopt(p, args->args);
case LINUX_SENDMSG:
do {
int error;
int level;
caddr_t control;
struct {
int s;
const struct msghdr *msg;
int flags;
} *uap = args->args;
error = copyin(&uap->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;
error = copyout(&level, &((struct cmsghdr *)control)->
cmsg_level, sizeof(int));
if (error)
return error;
}
done:
return sendmsg(p, args->args);
} while (0);
case LINUX_RECVMSG:
return recvmsg(p, args->args);
default:
uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what);
return ENOSYS;
}
}