614 lines
18 KiB
C
614 lines
18 KiB
C
/*
|
|
* Server-side request handling
|
|
*
|
|
* Copyright (C) 1998 Alexandre Julliard
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "wine/port.h"
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <pwd.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
# include <sys/socket.h>
|
|
#endif
|
|
#include <sys/uio.h>
|
|
#include <sys/un.h>
|
|
#include <unistd.h>
|
|
|
|
#include "winnt.h"
|
|
#include "winbase.h"
|
|
#include "wincon.h"
|
|
#include "thread.h"
|
|
#include "process.h"
|
|
#define WANT_REQUEST_HANDLERS
|
|
#include "request.h"
|
|
|
|
/* Some versions of glibc don't define this */
|
|
#ifndef SCM_RIGHTS
|
|
#define SCM_RIGHTS 1
|
|
#endif
|
|
|
|
/* path names for server master Unix socket */
|
|
#define CONFDIR "/.wine" /* directory for Wine config relative to $HOME */
|
|
#define SERVERDIR "wineserver-" /* server socket directory (hostname appended) */
|
|
#define SOCKETNAME "socket" /* name of the socket file */
|
|
|
|
struct master_socket
|
|
{
|
|
struct object obj; /* object header */
|
|
struct timeout_user *timeout; /* timeout on last process exit */
|
|
};
|
|
|
|
static void master_socket_dump( struct object *obj, int verbose );
|
|
static void master_socket_poll_event( struct object *obj, int event );
|
|
|
|
static const struct object_ops master_socket_ops =
|
|
{
|
|
sizeof(struct master_socket), /* size */
|
|
master_socket_dump, /* dump */
|
|
no_add_queue, /* add_queue */
|
|
NULL, /* remove_queue */
|
|
NULL, /* signaled */
|
|
NULL, /* satisfied */
|
|
NULL, /* get_poll_events */
|
|
master_socket_poll_event, /* poll_event */
|
|
no_get_fd, /* get_fd */
|
|
no_flush, /* flush */
|
|
no_get_file_info, /* get_file_info */
|
|
NULL, /* queue_async */
|
|
no_destroy /* destroy */
|
|
};
|
|
|
|
|
|
struct thread *current = NULL; /* thread handling the current request */
|
|
unsigned int global_error = 0; /* global error code for when no thread is current */
|
|
unsigned int server_start_ticks = 0; /* tick count offset from server startup */
|
|
|
|
static struct master_socket *master_socket; /* the master socket object */
|
|
|
|
/* socket communication static structures */
|
|
static struct iovec myiovec;
|
|
static struct msghdr msghdr;
|
|
#ifndef HAVE_MSGHDR_ACCRIGHTS
|
|
struct cmsg_fd
|
|
{
|
|
int len; /* sizeof structure */
|
|
int level; /* SOL_SOCKET */
|
|
int type; /* SCM_RIGHTS */
|
|
int fd; /* fd to pass */
|
|
};
|
|
static struct cmsg_fd cmsg = { sizeof(cmsg), SOL_SOCKET, SCM_RIGHTS, -1 };
|
|
#endif /* HAVE_MSGHDR_ACCRIGHTS */
|
|
|
|
/* complain about a protocol error and terminate the client connection */
|
|
void fatal_protocol_error( struct thread *thread, const char *err, ... )
|
|
{
|
|
va_list args;
|
|
|
|
va_start( args, err );
|
|
fprintf( stderr, "Protocol error:%p: ", thread );
|
|
vfprintf( stderr, err, args );
|
|
va_end( args );
|
|
thread->exit_code = 1;
|
|
kill_thread( thread, 1 );
|
|
}
|
|
|
|
/* complain about a protocol error and terminate the client connection */
|
|
void fatal_protocol_perror( struct thread *thread, const char *err, ... )
|
|
{
|
|
va_list args;
|
|
|
|
va_start( args, err );
|
|
fprintf( stderr, "Protocol error:%p: ", thread );
|
|
vfprintf( stderr, err, args );
|
|
perror( " " );
|
|
va_end( args );
|
|
thread->exit_code = 1;
|
|
kill_thread( thread, 1 );
|
|
}
|
|
|
|
/* die on a fatal error */
|
|
void fatal_error( const char *err, ... )
|
|
{
|
|
va_list args;
|
|
|
|
va_start( args, err );
|
|
fprintf( stderr, "wineserver: " );
|
|
vfprintf( stderr, err, args );
|
|
va_end( args );
|
|
exit(1);
|
|
}
|
|
|
|
/* die on a fatal error */
|
|
void fatal_perror( const char *err, ... )
|
|
{
|
|
va_list args;
|
|
|
|
va_start( args, err );
|
|
fprintf( stderr, "wineserver: " );
|
|
vfprintf( stderr, err, args );
|
|
perror( " " );
|
|
va_end( args );
|
|
exit(1);
|
|
}
|
|
|
|
/* allocate the reply data */
|
|
void *set_reply_data_size( size_t size )
|
|
{
|
|
assert( size <= get_reply_max_size() );
|
|
if (size && !(current->reply_data = mem_alloc( size ))) size = 0;
|
|
current->reply_size = size;
|
|
return current->reply_data;
|
|
}
|
|
|
|
/* write the remaining part of the reply */
|
|
void write_reply( struct thread *thread )
|
|
{
|
|
int ret;
|
|
|
|
if ((ret = write( thread->reply_fd,
|
|
(char *)thread->reply_data + thread->reply_size - thread->reply_towrite,
|
|
thread->reply_towrite )) >= 0)
|
|
{
|
|
if (!(thread->reply_towrite -= ret))
|
|
{
|
|
free( thread->reply_data );
|
|
thread->reply_data = NULL;
|
|
/* sent everything, can go back to waiting for requests */
|
|
change_select_fd( &thread->obj, thread->request_fd, POLLIN );
|
|
}
|
|
return;
|
|
}
|
|
if (errno == EPIPE)
|
|
kill_thread( thread, 0 ); /* normal death */
|
|
else if (errno != EWOULDBLOCK && errno != EAGAIN)
|
|
fatal_protocol_perror( thread, "reply write" );
|
|
}
|
|
|
|
/* send a reply to the current thread */
|
|
static void send_reply( union generic_reply *reply )
|
|
{
|
|
int ret;
|
|
|
|
if (!current->reply_size)
|
|
{
|
|
if ((ret = write( current->reply_fd, reply, sizeof(*reply) )) != sizeof(*reply)) goto error;
|
|
}
|
|
else
|
|
{
|
|
struct iovec vec[2];
|
|
|
|
vec[0].iov_base = (void *)reply;
|
|
vec[0].iov_len = sizeof(*reply);
|
|
vec[1].iov_base = current->reply_data;
|
|
vec[1].iov_len = current->reply_size;
|
|
|
|
if ((ret = writev( current->reply_fd, vec, 2 )) < sizeof(*reply)) goto error;
|
|
|
|
if ((current->reply_towrite = current->reply_size - (ret - sizeof(*reply))))
|
|
{
|
|
/* couldn't write it all, wait for POLLOUT */
|
|
change_select_fd( ¤t->obj, current->reply_fd, POLLOUT );
|
|
return;
|
|
}
|
|
}
|
|
if (current->reply_data)
|
|
{
|
|
free( current->reply_data );
|
|
current->reply_data = NULL;
|
|
}
|
|
return;
|
|
|
|
error:
|
|
if (ret >= 0)
|
|
fatal_protocol_error( current, "partial write %d\n", ret );
|
|
else if (errno == EPIPE)
|
|
kill_thread( current, 0 ); /* normal death */
|
|
else
|
|
fatal_protocol_perror( current, "reply write" );
|
|
}
|
|
|
|
/* call a request handler */
|
|
static void call_req_handler( struct thread *thread )
|
|
{
|
|
union generic_reply reply;
|
|
enum request req = thread->req.request_header.req;
|
|
|
|
current = thread;
|
|
current->reply_size = 0;
|
|
clear_error();
|
|
memset( &reply, 0, sizeof(reply) );
|
|
|
|
if (debug_level) trace_request();
|
|
|
|
if (req < REQ_NB_REQUESTS)
|
|
{
|
|
req_handlers[req]( ¤t->req, &reply );
|
|
if (current)
|
|
{
|
|
reply.reply_header.error = current->error;
|
|
reply.reply_header.reply_size = current->reply_size;
|
|
if (debug_level) trace_reply( req, &reply );
|
|
send_reply( &reply );
|
|
}
|
|
current = NULL;
|
|
return;
|
|
}
|
|
fatal_protocol_error( current, "bad request %d\n", req );
|
|
}
|
|
|
|
/* read a request from a thread */
|
|
void read_request( struct thread *thread )
|
|
{
|
|
int ret;
|
|
|
|
if (!thread->req_toread) /* no pending request */
|
|
{
|
|
if ((ret = read( thread->obj.fd, &thread->req,
|
|
sizeof(thread->req) )) != sizeof(thread->req)) goto error;
|
|
if (!(thread->req_toread = thread->req.request_header.request_size))
|
|
{
|
|
/* no data, handle request at once */
|
|
call_req_handler( thread );
|
|
return;
|
|
}
|
|
if (!(thread->req_data = malloc( thread->req_toread )))
|
|
fatal_protocol_error( thread, "no memory for %d bytes request\n", thread->req_toread );
|
|
}
|
|
|
|
/* read the variable sized data */
|
|
for (;;)
|
|
{
|
|
ret = read( thread->obj.fd, ((char *)thread->req_data +
|
|
thread->req.request_header.request_size - thread->req_toread),
|
|
thread->req_toread );
|
|
if (ret <= 0) break;
|
|
if (!(thread->req_toread -= ret))
|
|
{
|
|
call_req_handler( thread );
|
|
free( thread->req_data );
|
|
thread->req_data = NULL;
|
|
return;
|
|
}
|
|
}
|
|
|
|
error:
|
|
if (!ret) /* closed pipe */
|
|
kill_thread( thread, 0 );
|
|
else if (ret > 0)
|
|
fatal_protocol_error( thread, "partial read %d\n", ret );
|
|
else if (errno != EWOULDBLOCK && errno != EAGAIN)
|
|
fatal_protocol_perror( thread, "read" );
|
|
}
|
|
|
|
/* receive a file descriptor on the process socket */
|
|
int receive_fd( struct process *process )
|
|
{
|
|
struct send_fd data;
|
|
int fd, ret;
|
|
|
|
#ifdef HAVE_MSGHDR_ACCRIGHTS
|
|
msghdr.msg_accrightslen = sizeof(int);
|
|
msghdr.msg_accrights = (void *)&fd;
|
|
#else /* HAVE_MSGHDR_ACCRIGHTS */
|
|
msghdr.msg_control = &cmsg;
|
|
msghdr.msg_controllen = sizeof(cmsg);
|
|
cmsg.fd = -1;
|
|
#endif /* HAVE_MSGHDR_ACCRIGHTS */
|
|
|
|
myiovec.iov_base = (void *)&data;
|
|
myiovec.iov_len = sizeof(data);
|
|
|
|
ret = recvmsg( process->obj.fd, &msghdr, 0 );
|
|
#ifndef HAVE_MSGHDR_ACCRIGHTS
|
|
fd = cmsg.fd;
|
|
#endif
|
|
|
|
if (ret == sizeof(data))
|
|
{
|
|
struct thread *thread;
|
|
|
|
if (data.tid) thread = get_thread_from_id( data.tid );
|
|
else thread = (struct thread *)grab_object( process->thread_list );
|
|
|
|
if (!thread || thread->process != process)
|
|
{
|
|
if (debug_level)
|
|
fprintf( stderr, "%08x: *fd* %d <- %d bad thread id\n",
|
|
(unsigned int)data.tid, data.fd, fd );
|
|
close( fd );
|
|
}
|
|
else
|
|
{
|
|
if (debug_level)
|
|
fprintf( stderr, "%08x: *fd* %d <- %d\n",
|
|
(unsigned int)thread, data.fd, fd );
|
|
thread_add_inflight_fd( thread, data.fd, fd );
|
|
}
|
|
if (thread) release_object( thread );
|
|
return 0;
|
|
}
|
|
|
|
if (ret >= 0)
|
|
{
|
|
if (ret > 0)
|
|
fprintf( stderr, "Protocol error: process %p: partial recvmsg %d for fd\n",
|
|
process, ret );
|
|
kill_process( process, NULL, 1 );
|
|
}
|
|
else
|
|
{
|
|
if (errno != EWOULDBLOCK && errno != EAGAIN)
|
|
{
|
|
fprintf( stderr, "Protocol error: process %p: ", process );
|
|
perror( "recvmsg" );
|
|
kill_process( process, NULL, 1 );
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* send an fd to a client */
|
|
int send_client_fd( struct process *process, int fd, handle_t handle )
|
|
{
|
|
int ret;
|
|
|
|
if (debug_level)
|
|
fprintf( stderr, "%08x: *fd* %d -> %d\n", (unsigned int)current, handle, fd );
|
|
|
|
#ifdef HAVE_MSGHDR_ACCRIGHTS
|
|
msghdr.msg_accrightslen = sizeof(fd);
|
|
msghdr.msg_accrights = (void *)&fd;
|
|
#else /* HAVE_MSGHDR_ACCRIGHTS */
|
|
msghdr.msg_control = &cmsg;
|
|
msghdr.msg_controllen = sizeof(cmsg);
|
|
cmsg.fd = fd;
|
|
#endif /* HAVE_MSGHDR_ACCRIGHTS */
|
|
|
|
myiovec.iov_base = (void *)&handle;
|
|
myiovec.iov_len = sizeof(handle);
|
|
|
|
ret = sendmsg( process->obj.fd, &msghdr, 0 );
|
|
|
|
if (ret == sizeof(handle)) return 0;
|
|
|
|
if (ret >= 0)
|
|
{
|
|
if (ret > 0)
|
|
fprintf( stderr, "Protocol error: process %p: partial sendmsg %d\n", process, ret );
|
|
kill_process( process, NULL, 1 );
|
|
}
|
|
else
|
|
{
|
|
fprintf( stderr, "Protocol error: process %p: ", process );
|
|
perror( "sendmsg" );
|
|
kill_process( process, NULL, 1 );
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* get current tick count to return to client */
|
|
unsigned int get_tick_count(void)
|
|
{
|
|
struct timeval t;
|
|
gettimeofday( &t, NULL );
|
|
return (t.tv_sec * 1000) + (t.tv_usec / 1000) - server_start_ticks;
|
|
}
|
|
|
|
static void master_socket_dump( struct object *obj, int verbose )
|
|
{
|
|
struct master_socket *sock = (struct master_socket *)obj;
|
|
assert( obj->ops == &master_socket_ops );
|
|
fprintf( stderr, "Master socket fd=%d\n", sock->obj.fd );
|
|
}
|
|
|
|
/* handle a socket event */
|
|
static void master_socket_poll_event( struct object *obj, int event )
|
|
{
|
|
struct master_socket *sock = (struct master_socket *)obj;
|
|
assert( obj->ops == &master_socket_ops );
|
|
|
|
assert( sock == master_socket ); /* there is only one master socket */
|
|
|
|
if (event & (POLLERR | POLLHUP))
|
|
{
|
|
/* this is not supposed to happen */
|
|
fprintf( stderr, "wineserver: Error on master socket\n" );
|
|
release_object( obj );
|
|
}
|
|
else if (event & POLLIN)
|
|
{
|
|
struct sockaddr_un dummy;
|
|
int len = sizeof(dummy);
|
|
int client = accept( master_socket->obj.fd, (struct sockaddr *) &dummy, &len );
|
|
if (client == -1) return;
|
|
if (sock->timeout)
|
|
{
|
|
remove_timeout_user( sock->timeout );
|
|
sock->timeout = NULL;
|
|
}
|
|
fcntl( client, F_SETFL, O_NONBLOCK );
|
|
create_process( client );
|
|
}
|
|
}
|
|
|
|
/* remove the socket upon exit */
|
|
static void socket_cleanup(void)
|
|
{
|
|
static int do_it_once;
|
|
if (!do_it_once++) unlink( SOCKETNAME );
|
|
}
|
|
|
|
/* return the configuration directory ($WINEPREFIX or $HOME/.wine) */
|
|
const char *get_config_dir(void)
|
|
{
|
|
static char *confdir;
|
|
if (!confdir)
|
|
{
|
|
const char *prefix = getenv( "WINEPREFIX" );
|
|
if (prefix)
|
|
{
|
|
int len = strlen(prefix);
|
|
if (!(confdir = strdup( prefix ))) fatal_error( "out of memory\n" );
|
|
if (len > 1 && confdir[len-1] == '/') confdir[len-1] = 0;
|
|
}
|
|
else
|
|
{
|
|
const char *home = getenv( "HOME" );
|
|
if (!home)
|
|
{
|
|
struct passwd *pwd = getpwuid( getuid() );
|
|
if (!pwd) fatal_error( "could not find your home directory\n" );
|
|
home = pwd->pw_dir;
|
|
}
|
|
if (!(confdir = malloc( strlen(home) + strlen(CONFDIR) + 1 )))
|
|
fatal_error( "out of memory\n" );
|
|
strcpy( confdir, home );
|
|
strcat( confdir, CONFDIR );
|
|
}
|
|
}
|
|
return confdir;
|
|
}
|
|
|
|
/* create the server directory and chdir to it */
|
|
static void create_server_dir(void)
|
|
{
|
|
char hostname[64];
|
|
char *serverdir;
|
|
const char *confdir = get_config_dir();
|
|
struct stat st;
|
|
|
|
if (gethostname( hostname, sizeof(hostname) ) == -1) fatal_perror( "gethostname" );
|
|
|
|
if (!(serverdir = malloc( strlen(SERVERDIR) + strlen(hostname) + 1 )))
|
|
fatal_error( "out of memory\n" );
|
|
|
|
if (chdir( confdir ) == -1) fatal_perror( "chdir %s", confdir );
|
|
|
|
strcpy( serverdir, SERVERDIR );
|
|
strcat( serverdir, hostname );
|
|
|
|
if (chdir( serverdir ) == -1)
|
|
{
|
|
if (errno != ENOENT) fatal_perror( "chdir %s", serverdir );
|
|
if (mkdir( serverdir, 0700 ) == -1) fatal_perror( "mkdir %s", serverdir );
|
|
if (chdir( serverdir ) == -1) fatal_perror( "chdir %s", serverdir );
|
|
}
|
|
if (stat( ".", &st ) == -1) fatal_perror( "stat %s", serverdir );
|
|
if (!S_ISDIR(st.st_mode)) fatal_error( "%s is not a directory\n", serverdir );
|
|
if (st.st_uid != getuid()) fatal_error( "%s is not owned by you\n", serverdir );
|
|
if (st.st_mode & 077) fatal_error( "%s must not be accessible by other users\n", serverdir );
|
|
}
|
|
|
|
/* open the master server socket and start waiting for new clients */
|
|
void open_master_socket(void)
|
|
{
|
|
struct sockaddr_un addr;
|
|
int fd, slen;
|
|
|
|
/* make sure no request is larger than the maximum size */
|
|
assert( sizeof(union generic_request) == sizeof(struct request_max_size) );
|
|
assert( sizeof(union generic_reply) == sizeof(struct request_max_size) );
|
|
|
|
create_server_dir();
|
|
if ((fd = socket( AF_UNIX, SOCK_STREAM, 0 )) == -1) fatal_perror( "socket" );
|
|
addr.sun_family = AF_UNIX;
|
|
strcpy( addr.sun_path, SOCKETNAME );
|
|
slen = sizeof(addr) - sizeof(addr.sun_path) + strlen(addr.sun_path) + 1;
|
|
#ifdef HAVE_SOCKADDR_SUN_LEN
|
|
addr.sun_len = slen;
|
|
#endif
|
|
if (bind( fd, (struct sockaddr *)&addr, slen ) == -1)
|
|
{
|
|
if ((errno == EEXIST) || (errno == EADDRINUSE))
|
|
exit(0); /* pretend we succeeded to start */
|
|
else
|
|
fatal_perror( "bind" );
|
|
}
|
|
atexit( socket_cleanup );
|
|
|
|
chmod( SOCKETNAME, 0600 ); /* make sure no other user can connect */
|
|
if (listen( fd, 5 ) == -1) fatal_perror( "listen" );
|
|
|
|
if (!(master_socket = alloc_object( &master_socket_ops, fd )))
|
|
fatal_error( "out of memory\n" );
|
|
master_socket->timeout = NULL;
|
|
set_select_events( &master_socket->obj, POLLIN );
|
|
|
|
/* setup msghdr structure constant fields */
|
|
msghdr.msg_name = NULL;
|
|
msghdr.msg_namelen = 0;
|
|
msghdr.msg_iov = &myiovec;
|
|
msghdr.msg_iovlen = 1;
|
|
|
|
/* init startup ticks */
|
|
server_start_ticks = get_tick_count();
|
|
|
|
/* go in the background */
|
|
switch(fork())
|
|
{
|
|
case -1:
|
|
fatal_perror( "fork" );
|
|
case 0:
|
|
setsid();
|
|
break;
|
|
default:
|
|
_exit(0); /* do not call atexit functions */
|
|
}
|
|
}
|
|
|
|
/* master socket timer expiration handler */
|
|
static void close_socket_timeout( void *arg )
|
|
{
|
|
/* if a new client is waiting, we keep on running */
|
|
if (!check_select_events( master_socket->obj.fd, POLLIN ))
|
|
release_object( master_socket );
|
|
}
|
|
|
|
/* close the master socket and stop waiting for new clients */
|
|
void close_master_socket(void)
|
|
{
|
|
struct timeval when;
|
|
|
|
if (master_socket_timeout == -1) return; /* just keep running forever */
|
|
|
|
if (master_socket_timeout)
|
|
{
|
|
gettimeofday( &when, 0 );
|
|
add_timeout( &when, master_socket_timeout * 1000 );
|
|
master_socket->timeout = add_timeout_user( &when, close_socket_timeout, NULL );
|
|
}
|
|
else close_socket_timeout( NULL ); /* close it right away */
|
|
}
|
|
|
|
/* lock/unlock the master socket to stop accepting new clients */
|
|
void lock_master_socket( int locked )
|
|
{
|
|
set_select_events( &master_socket->obj, locked ? 0 : POLLIN );
|
|
}
|