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Edit File: Xtrans.c

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* Copyright 1993, 1994 NCR Corporation - Dayton, Ohio, USA
 *
 * All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name NCR not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission.  NCR makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * NCR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL NCR BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_SYSTEMD_DAEMON
#include <systemd/sd-daemon.h>
#endif

/*
 * The transport table contains a definition for every transport (protocol)
 * family. All operations that can be made on the transport go through this
 * table.
 *
 * Each transport is assigned a unique transport id.
 *
 * New transports can be added by adding an entry in this table.
 * For compatiblity, the transport ids should never be renumbered.
 * Always add to the end of the list.
 */

#define TRANS_TLI_INET_INDEX		1
#define TRANS_TLI_TCP_INDEX		2
#define TRANS_TLI_TLI_INDEX		3
#define TRANS_SOCKET_UNIX_INDEX		4
#define TRANS_SOCKET_LOCAL_INDEX	5
#define TRANS_SOCKET_INET_INDEX		6
#define TRANS_SOCKET_TCP_INDEX		7
#define TRANS_DNET_INDEX		8
#define TRANS_LOCAL_LOCAL_INDEX		9
#define TRANS_LOCAL_PTS_INDEX		10
#define TRANS_LOCAL_NAMED_INDEX		11
/* 12 used to be ISC, but that's gone. */
#define TRANS_LOCAL_SCO_INDEX		13
#define TRANS_SOCKET_INET6_INDEX	14
#define TRANS_LOCAL_PIPE_INDEX		15

static
Xtransport_table Xtransports[] = {
#if defined(TCPCONN)
    { &TRANS(SocketTCPFuncs),	TRANS_SOCKET_TCP_INDEX },
#if defined(IPv6) && defined(AF_INET6)
    { &TRANS(SocketINET6Funcs),	TRANS_SOCKET_INET6_INDEX },
#endif /* IPv6 */
    { &TRANS(SocketINETFuncs),	TRANS_SOCKET_INET_INDEX },
#endif /* TCPCONN */
#if defined(UNIXCONN)
#if !defined(LOCALCONN)
    { &TRANS(SocketLocalFuncs),	TRANS_SOCKET_LOCAL_INDEX },
#endif /* !LOCALCONN */
    { &TRANS(SocketUNIXFuncs),	TRANS_SOCKET_UNIX_INDEX },
#endif /* UNIXCONN */
#if defined(LOCALCONN)
    { &TRANS(LocalFuncs),	TRANS_LOCAL_LOCAL_INDEX },
#ifndef __sun
    { &TRANS(PTSFuncs),		TRANS_LOCAL_PTS_INDEX },
#endif /* __sun */
#if defined(SVR4) || defined(__SVR4)
    { &TRANS(NAMEDFuncs),	TRANS_LOCAL_NAMED_INDEX },
#endif
#ifdef __sun
    { &TRANS(PIPEFuncs),	TRANS_LOCAL_PIPE_INDEX },
#endif /* __sun */
#if defined(__SCO__) || defined(__UNIXWARE__)
    { &TRANS(SCOFuncs),		TRANS_LOCAL_SCO_INDEX },
#endif /* __SCO__ || __UNIXWARE__ */
#endif /* LOCALCONN */
};

#define NUMTRANS	(sizeof(Xtransports)/sizeof(Xtransport_table))

#ifdef WIN32
#define ioctl ioctlsocket
#endif

/*
 * These are a few utility function used by the public interface functions.
 */

void
TRANS(FreeConnInfo) (XtransConnInfo ciptr)

{
    prmsg (3,"FreeConnInfo(%p)\n", ciptr);

if (ciptr->addr)
	free (ciptr->addr);

if (ciptr->peeraddr)
	free (ciptr->peeraddr);

if (ciptr->port)
	free (ciptr->port);

free (ciptr);
}

#define PROTOBUFSIZE	20

static Xtransport *
TRANS(SelectTransport) (const char *protocol)

{
#ifndef HAVE_STRCASECMP
    char 	protobuf[PROTOBUFSIZE];
#endif
    int		i;

prmsg (3,"SelectTransport(%s)\n", protocol);

#ifndef HAVE_STRCASECMP
    /*
     * Force Protocol to be lowercase as a way of doing
     * a case insensitive match.
     */

strncpy (protobuf, protocol, PROTOBUFSIZE - 1);
    protobuf[PROTOBUFSIZE-1] = '\0';

for (i = 0; i < PROTOBUFSIZE && protobuf[i] != '\0'; i++)
	if (isupper ((unsigned char)protobuf[i]))
	    protobuf[i] = tolower ((unsigned char)protobuf[i]);
#endif

/* Look at all of the configured protocols */

for (i = 0; i < NUMTRANS; i++)
    {
#ifndef HAVE_STRCASECMP
	if (!strcmp (protobuf, Xtransports[i].transport->TransName))
#else
	if (!strcasecmp (protocol, Xtransports[i].transport->TransName))
#endif
	    return Xtransports[i].transport;
    }

return NULL;
}

#ifndef TEST_t
static
#endif /* TEST_t */
int
TRANS(ParseAddress) (const char *address,
                     char **protocol, char **host, char **port)

{
    /*
     * For the font library, the address is a string formatted
     * as "protocol/host:port[/catalogue]".  Note that the catologue
     * is optional.  At this time, the catologue info is ignored, but
     * we have to parse it anyways.
     *
     * Other than fontlib, the address is a string formatted
     * as "protocol/host:port".
     *
     * If the protocol part is missing, then assume TCP.
     * If the protocol part and host part are missing, then assume local.
     * If a "::" is found then assume DNET.
     */

char	*mybuf, *tmpptr;
    const char	*_protocol;
    char	*_host, *_port;
    char	hostnamebuf[256];
    int		_host_len;

prmsg (3,"ParseAddress(%s)\n", address);

/* Copy the string so it can be changed */

tmpptr = mybuf = strdup (address);

/* Parse the string to get each component */

/* Get the protocol part */

_protocol = mybuf;

if ( ((mybuf = strchr (mybuf,'/')) == NULL) &&
      ((mybuf = strrchr (tmpptr,':')) == NULL) )
   {
	/* address is in a bad format */
	*protocol = NULL;
	*host = NULL;
	*port = NULL;
	free (tmpptr);
	return 0;
    }

if (*mybuf == ':')
    {
	/*
	 * If there is a hostname, then assume tcp, otherwise
	 * it must be local.
	 */
	if (mybuf == tmpptr)
	{
	    /* There is neither a protocol or host specified */
	    _protocol = "local";
	}
	else
	{
	    /* There is a hostname specified */
	    _protocol = "tcp";
	    mybuf = tmpptr;	/* reset to the begining of the host ptr */
	}
    }
    else
    {
	/* *mybuf == '/' */

*mybuf ++= '\0'; /* put a null at the end of the protocol */

if (strlen(_protocol) == 0)
	{
	    /*
	     * If there is a hostname, then assume tcp, otherwise
	     * it must be local.
	     */
	    if (*mybuf != ':')
		_protocol = "tcp";
	    else
		_protocol = "local";
	}
    }

/* Get the host part */

_host = mybuf;

if ((mybuf = strrchr (mybuf,':')) == NULL)
    {
	*protocol = NULL;
	*host = NULL;
	*port = NULL;
	free (tmpptr);
	return 0;
    }

*mybuf ++= '\0';

_host_len = strlen(_host);
    if (_host_len == 0)
    {
	TRANS(GetHostname) (hostnamebuf, sizeof (hostnamebuf));
	_host = hostnamebuf;
    }
#if defined(IPv6) && defined(AF_INET6)
    /* hostname in IPv6 [numeric_addr]:0 form? */
    else if ( (_host_len > 3) &&
      ((strcmp(_protocol, "tcp") == 0) || (strcmp(_protocol, "inet6") == 0))
      && (*_host == '[') && (*(_host + _host_len - 1) == ']') ) {
	struct sockaddr_in6 sin6;

*(_host + _host_len - 1) = '\0';

/* Verify address is valid IPv6 numeric form */
	if (inet_pton(AF_INET6, _host + 1, &sin6) == 1) {
	    /* It is. Use it as such. */
	    _host++;
	    _protocol = "inet6";
	} else {
	    /* It's not, restore it just in case some other code can use it. */
	    *(_host + _host_len - 1) = ']';
	}
    }
#endif

/* Get the port */

_port = mybuf;

#if defined(FONT_t) || defined(FS_t)
    /*
     * Is there an optional catalogue list?
     */

if ((mybuf = strchr (mybuf,'/')) != NULL)
	*mybuf ++= '\0';

/*
     * The rest, if any, is the (currently unused) catalogue list.
     *
     * _catalogue = mybuf;
     */
#endif

#ifdef HAVE_LAUNCHD
    /* launchd sockets will look like 'local//tmp/launch-XgkNns/:0' */
    if(address != NULL && strlen(address)>8 && (!strncmp(address,"local//",7))) {
      _protocol="local";
      _host="";
      _port=address+6;
    }
#endif

/*
     * Now that we have all of the components, allocate new
     * string space for them.
     */

if ((*protocol = strdup (_protocol)) == NULL)
    {
	/* Malloc failed */
	*port = NULL;
	*host = NULL;
	*protocol = NULL;
	free (tmpptr);
	return 0;
    }

if ((*host = strdup (_host)) == NULL)
    {
	/* Malloc failed */
	*port = NULL;
	*host = NULL;
	free (*protocol);
	*protocol = NULL;
	free (tmpptr);
	return 0;
    }

if ((*port = strdup (_port)) == NULL)
    {
	/* Malloc failed */
	*port = NULL;
	free (*host);
	*host = NULL;
	free (*protocol);
	*protocol = NULL;
	free (tmpptr);
	return 0;
    }

free (tmpptr);

return 1;
}

/*
 * TRANS(Open) does all of the real work opening a connection. The only
 * funny part about this is the type parameter which is used to decide which
 * type of open to perform.
 */

static XtransConnInfo
TRANS(Open) (int type, const char *address)

{
    char 		*protocol = NULL, *host = NULL, *port = NULL;
    XtransConnInfo	ciptr = NULL;
    Xtransport		*thistrans;

prmsg (2,"Open(%d,%s)\n", type, address);

#if defined(WIN32) && defined(TCPCONN)
    if (TRANS(WSAStartup)())
    {
	prmsg (1,"Open: WSAStartup failed\n");
	return NULL;
    }
#endif

/* Parse the Address */

if (TRANS(ParseAddress) (address, &protocol, &host, &port) == 0)
    {
	prmsg (1,"Open: Unable to Parse address %s\n", address);
	return NULL;
    }

/* Determine the transport type */

if ((thistrans = TRANS(SelectTransport) (protocol)) == NULL)
    {
	prmsg (1,"Open: Unable to find transport for %s\n",
	       protocol);

free (protocol);
	free (host);
	free (port);
	return NULL;
    }

/* Open the transport */

switch (type)
    {
    case XTRANS_OPEN_COTS_CLIENT:
#ifdef TRANS_CLIENT
	ciptr = thistrans->OpenCOTSClient(thistrans, protocol, host, port);
#endif /* TRANS_CLIENT */
	break;
    case XTRANS_OPEN_COTS_SERVER:
#ifdef TRANS_SERVER
	ciptr = thistrans->OpenCOTSServer(thistrans, protocol, host, port);
#endif /* TRANS_SERVER */
	break;
    default:
	prmsg (1,"Open: Unknown Open type %d\n", type);
    }

if (ciptr == NULL)
    {
	if (!(thistrans->flags & TRANS_DISABLED))
	{
	    prmsg (1,"Open: transport open failed for %s/%s:%s\n",
	           protocol, host, port);
	}
	free (protocol);
	free (host);
	free (port);
	return NULL;
    }

ciptr->transptr = thistrans;
    ciptr->port = port;			/* We need this for TRANS(Reopen) */

free (protocol);
    free (host);

return ciptr;
}

#ifdef TRANS_REOPEN

/*
 * We might want to create an XtransConnInfo object based on a previously
 * opened connection.  For example, the font server may clone itself and
 * pass file descriptors to the parent.
 */

static XtransConnInfo
TRANS(Reopen) (int type, int trans_id, int fd, const char *port)

{
    XtransConnInfo	ciptr = NULL;
    Xtransport		*thistrans = NULL;
    char		*save_port;
    int			i;

prmsg (2,"Reopen(%d,%d,%s)\n", trans_id, fd, port);

/* Determine the transport type */

for (i = 0; i < NUMTRANS; i++)
	if (Xtransports[i].transport_id == trans_id)
	{
	    thistrans = Xtransports[i].transport;
	    break;
	}

if (thistrans == NULL)
    {
	prmsg (1,"Reopen: Unable to find transport id %d\n",
	       trans_id);

return NULL;
    }

if ((save_port = strdup (port)) == NULL)
    {
	prmsg (1,"Reopen: Unable to malloc port string\n");

return NULL;
    }

/* Get a new XtransConnInfo object */

switch (type)
    {
    case XTRANS_OPEN_COTS_SERVER:
	ciptr = thistrans->ReopenCOTSServer(thistrans, fd, port);
	break;
    default:
	prmsg (1,"Reopen: Bad Open type %d\n", type);
    }

if (ciptr == NULL)
    {
	prmsg (1,"Reopen: transport open failed\n");
	free (save_port);
	return NULL;
    }

ciptr->transptr = thistrans;
    ciptr->port = save_port;

return ciptr;
}

#endif /* TRANS_REOPEN */

/*
 * These are the public interfaces to this Transport interface.
 * These are the only functions that should have knowledge of the transport
 * table.
 */

#ifdef TRANS_CLIENT

XtransConnInfo
TRANS(OpenCOTSClient) (const char *address)

{
    prmsg (2,"OpenCOTSClient(%s)\n", address);
    return TRANS(Open) (XTRANS_OPEN_COTS_CLIENT, address);
}

#endif /* TRANS_CLIENT */

#ifdef TRANS_SERVER

XtransConnInfo
TRANS(OpenCOTSServer) (const char *address)

{
    prmsg (2,"OpenCOTSServer(%s)\n", address);
    return TRANS(Open) (XTRANS_OPEN_COTS_SERVER, address);
}

#endif /* TRANS_SERVER */

#ifdef TRANS_REOPEN

XtransConnInfo
TRANS(ReopenCOTSServer) (int trans_id, int fd, const char *port)

{
    prmsg (2,"ReopenCOTSServer(%d, %d, %s)\n", trans_id, fd, port);
    return TRANS(Reopen) (XTRANS_OPEN_COTS_SERVER, trans_id, fd, port);
}

int
TRANS(GetReopenInfo) (XtransConnInfo ciptr,
		      int *trans_id, int *fd, char **port)

{
    int i;

for (i = 0; i < NUMTRANS; i++)
	if (Xtransports[i].transport == ciptr->transptr)
	{
	    *trans_id = Xtransports[i].transport_id;
	    *fd = ciptr->fd;

if ((*port = strdup (ciptr->port)) == NULL)
		return 0;
	    else
		return 1;
	}

return 0;
}

#endif /* TRANS_REOPEN */

int
TRANS(SetOption) (XtransConnInfo ciptr, int option, int arg)

{
    int	fd = ciptr->fd;
    int	ret = 0;

prmsg (2,"SetOption(%d,%d,%d)\n", fd, option, arg);

/*
     * For now, all transport type use the same stuff for setting options.
     * As long as this is true, we can put the common code here. Once a more
     * complicated transport such as shared memory or an OSI implementation
     * that uses the session and application libraries is implemented, this
     * code may have to move to a transport dependent function.
     *
     * ret = ciptr->transptr->SetOption (ciptr, option, arg);
     */

switch (option)
    {
    case TRANS_NONBLOCKING:
	switch (arg)
	{
	case 0:
	    /* Set to blocking mode */
	    break;
	case 1: /* Set to non-blocking mode */

#if defined(O_NONBLOCK) && !defined(SCO325)
	    ret = fcntl (fd, F_GETFL, 0);
	    if (ret != -1)
		ret = fcntl (fd, F_SETFL, ret | O_NONBLOCK);
#else
#ifdef FIOSNBIO
	{
	    int arg;
	    arg = 1;
	    ret = ioctl (fd, FIOSNBIO, &arg);
	}
#else
#if defined(WIN32)
	{
#ifdef WIN32
	    u_long arg;
#else
	    int arg;
#endif
	    arg = 1;
/* IBM TCP/IP understands this option too well: it causes TRANS(Read) to fail
 * eventually with EWOULDBLOCK */
	    ret = ioctl (fd, FIONBIO, &arg);
	}
#else
	    ret = fcntl (fd, F_GETFL, 0);
#ifdef FNDELAY
	    ret = fcntl (fd, F_SETFL, ret | FNDELAY);
#else
	    ret = fcntl (fd, F_SETFL, ret | O_NDELAY);
#endif
#endif /* AIXV3  || uniosu */
#endif /* FIOSNBIO */
#endif /* O_NONBLOCK */
	    break;
	default:
	    /* Unknown option */
	    break;
	}
	break;
    case TRANS_CLOSEONEXEC:
#ifdef F_SETFD
#ifdef FD_CLOEXEC
	ret = fcntl (fd, F_SETFD, FD_CLOEXEC);
#else
	ret = fcntl (fd, F_SETFD, 1);
#endif /* FD_CLOEXEC */
#endif /* F_SETFD */
	break;
    }

return ret;
}

#ifdef TRANS_SERVER

int
TRANS(CreateListener) (XtransConnInfo ciptr, const char *port, unsigned int flags)

{
    return ciptr->transptr->CreateListener (ciptr, port, flags);
}

int
TRANS(Received) (const char * protocol)

{
   Xtransport *trans;
   int i = 0, ret = 0;

prmsg (5, "Received(%s)\n", protocol);

if ((trans = TRANS(SelectTransport)(protocol)) == NULL)
   {
	prmsg (1,"Received: unable to find transport: %s\n",
	       protocol);

return -1;
   }
   if (trans->flags & TRANS_ALIAS) {
       if (trans->nolisten)
	   while (trans->nolisten[i]) {
	       ret |= TRANS(Received)(trans->nolisten[i]);
	       i++;
       }
   }

trans->flags |= TRANS_RECEIVED;
   return ret;
}

int
TRANS(NoListen) (const char * protocol)

{
   Xtransport *trans;
   int i = 0, ret = 0;

if ((trans = TRANS(SelectTransport)(protocol)) == NULL)
   {
	prmsg (1,"TransNoListen: unable to find transport: %s\n",
	       protocol);

return -1;
   }
   if (trans->flags & TRANS_ALIAS) {
       if (trans->nolisten)
	   while (trans->nolisten[i]) {
	       ret |= TRANS(NoListen)(trans->nolisten[i]);
	       i++;
       }
   }

trans->flags |= TRANS_NOLISTEN;
   return ret;
}

int
TRANS(Listen) (const char * protocol)
{
   Xtransport *trans;
   int i = 0, ret = 0;

if ((trans = TRANS(SelectTransport)(protocol)) == NULL)
   {
	prmsg (1,"TransListen: unable to find transport: %s\n",
	       protocol);

return -1;
   }
   if (trans->flags & TRANS_ALIAS) {
       if (trans->nolisten)
	   while (trans->nolisten[i]) {
	       ret |= TRANS(Listen)(trans->nolisten[i]);
	       i++;
       }
   }

trans->flags &= ~TRANS_NOLISTEN;
   return ret;
}

int
TRANS(IsListening) (const char * protocol)
{
   Xtransport *trans;

if ((trans = TRANS(SelectTransport)(protocol)) == NULL)
   {
	prmsg (1,"TransIsListening: unable to find transport: %s\n",
	       protocol);

return 0;
   }

return !(trans->flags & TRANS_NOLISTEN);
}

int
TRANS(ResetListener) (XtransConnInfo ciptr)

{
    if (ciptr->transptr->ResetListener)
	return ciptr->transptr->ResetListener (ciptr);
    else
	return TRANS_RESET_NOOP;
}

XtransConnInfo
TRANS(Accept) (XtransConnInfo ciptr, int *status)

{
    XtransConnInfo	newciptr;

prmsg (2,"Accept(%d)\n", ciptr->fd);

newciptr = ciptr->transptr->Accept (ciptr, status);

if (newciptr)
	newciptr->transptr = ciptr->transptr;

return newciptr;
}

#endif /* TRANS_SERVER */

#ifdef TRANS_CLIENT

int
TRANS(Connect) (XtransConnInfo ciptr, const char *address)

{
    char	*protocol;
    char	*host;
    char	*port;
    int		ret;

prmsg (2,"Connect(%d,%s)\n", ciptr->fd, address);

if (TRANS(ParseAddress) (address, &protocol, &host, &port) == 0)
    {
	prmsg (1,"Connect: Unable to Parse address %s\n",
	       address);
	return -1;
    }

#ifdef HAVE_LAUNCHD
    if (!host) host=strdup("");
#endif

if (!port || !*port)
    {
	prmsg (1,"Connect: Missing port specification in %s\n",
	      address);
	if (protocol) free (protocol);
	if (host) free (host);
	return -1;
    }

ret = ciptr->transptr->Connect (ciptr, host, port);

if (protocol) free (protocol);
    if (host) free (host);
    if (port) free (port);

return ret;
}

#endif /* TRANS_CLIENT */

int
TRANS(BytesReadable) (XtransConnInfo ciptr, BytesReadable_t *pend)

{
    return ciptr->transptr->BytesReadable (ciptr, pend);
}

int
TRANS(Read) (XtransConnInfo ciptr, char *buf, int size)

{
    return ciptr->transptr->Read (ciptr, buf, size);
}

int
TRANS(Write) (XtransConnInfo ciptr, char *buf, int size)

{
    return ciptr->transptr->Write (ciptr, buf, size);
}

int
TRANS(Readv) (XtransConnInfo ciptr, struct iovec *buf, int size)

{
    return ciptr->transptr->Readv (ciptr, buf, size);
}

int
TRANS(Writev) (XtransConnInfo ciptr, struct iovec *buf, int size)

{
    return ciptr->transptr->Writev (ciptr, buf, size);
}

#if XTRANS_SEND_FDS
int
TRANS(SendFd) (XtransConnInfo ciptr, int fd, int do_close)
{
    return ciptr->transptr->SendFd(ciptr, fd, do_close);
}

int
TRANS(RecvFd) (XtransConnInfo ciptr)
{
    return ciptr->transptr->RecvFd(ciptr);
}
#endif

int
TRANS(Disconnect) (XtransConnInfo ciptr)

{
    return ciptr->transptr->Disconnect (ciptr);
}

int
TRANS(Close) (XtransConnInfo ciptr)

{
    int ret;

prmsg (2,"Close(%d)\n", ciptr->fd);

ret = ciptr->transptr->Close (ciptr);

TRANS(FreeConnInfo) (ciptr);

return ret;
}

int
TRANS(CloseForCloning) (XtransConnInfo ciptr)

{
    int ret;

prmsg (2,"CloseForCloning(%d)\n", ciptr->fd);

ret = ciptr->transptr->CloseForCloning (ciptr);

TRANS(FreeConnInfo) (ciptr);

return ret;
}

int
TRANS(IsLocal) (XtransConnInfo ciptr)

{
    return (ciptr->family == AF_UNIX);
}

int
TRANS(GetPeerAddr) (XtransConnInfo ciptr, int *familyp, int *addrlenp,
		    Xtransaddr **addrp)

{
    prmsg (2,"GetPeerAddr(%d)\n", ciptr->fd);

*familyp = ciptr->family;
    *addrlenp = ciptr->peeraddrlen;

if ((*addrp = malloc (ciptr->peeraddrlen)) == NULL)
    {
	prmsg (1,"GetPeerAddr: malloc failed\n");
	return -1;
    }
    memcpy(*addrp, ciptr->peeraddr, ciptr->peeraddrlen);

return 0;
}

int
TRANS(GetConnectionNumber) (XtransConnInfo ciptr)

{
    return ciptr->fd;
}

/*
 * These functions are really utility functions, but they require knowledge
 * of the internal data structures, so they have to be part of the Transport
 * Independant API.
 */

#ifdef TRANS_SERVER

static int
complete_network_count (void)

{
    int count = 0;
    int found_local = 0;
    int i;

/*
     * For a complete network, we only need one LOCALCONN transport to work
     */

for (i = 0; i < NUMTRANS; i++)
    {
	if (Xtransports[i].transport->flags & TRANS_ALIAS
   	 || Xtransports[i].transport->flags & TRANS_NOLISTEN)
	    continue;

if (Xtransports[i].transport->flags & TRANS_LOCAL)
	    found_local = 1;
	else
	    count++;
    }

return (count + found_local);
}

static int
receive_listening_fds(const char* port, XtransConnInfo* temp_ciptrs,
                      int* count_ret)

{
#ifdef HAVE_SYSTEMD_DAEMON
    XtransConnInfo ciptr;
    int i, systemd_listen_fds;

systemd_listen_fds = sd_listen_fds(1);
    if (systemd_listen_fds < 0)
    {
        prmsg (1, "receive_listening_fds: sd_listen_fds error: %s\n",
               strerror(-systemd_listen_fds));
        return -1;
    }

for (i = 0; i < systemd_listen_fds && *count_ret < NUMTRANS; i++)
    {
        struct sockaddr_storage a;
        int ti;
        const char* tn;
        socklen_t al;

al = sizeof(a);
        if (getsockname(i + SD_LISTEN_FDS_START, (struct sockaddr*)&a, &al) < 0) {
            prmsg (1, "receive_listening_fds: getsockname error: %s\n",
                   strerror(errno));
            return -1;
        }

switch (a.ss_family)
        {
        case AF_UNIX:
            ti = TRANS_SOCKET_UNIX_INDEX;
            if (*((struct sockaddr_un*)&a)->sun_path == '\0' &&
                al > sizeof(sa_family_t))
                tn = "local";
            else
                tn = "unix";
            break;
        case AF_INET:
            ti = TRANS_SOCKET_INET_INDEX;
            tn = "inet";
            break;
#if defined(IPv6) && defined(AF_INET6)
        case AF_INET6:
            ti = TRANS_SOCKET_INET6_INDEX;
            tn = "inet6";
            break;
#endif /* IPv6 */
        default:
            prmsg (1, "receive_listening_fds:"
                   "Got unknown socket address family\n");
            return -1;
        }

ciptr = TRANS(ReopenCOTSServer)(ti, i + SD_LISTEN_FDS_START, port);
        if (!ciptr)
        {
            prmsg (1, "receive_listening_fds:"
                   "Got NULL while trying to reopen socket received from systemd.\n");
            return -1;
        }

prmsg (5, "receive_listening_fds: received listener for %s, %d\n",
               tn, ciptr->fd);
        temp_ciptrs[(*count_ret)++] = ciptr;
        TRANS(Received)(tn);
    }
#endif /* HAVE_SYSTEMD_DAEMON */
    return 0;
}

#ifdef XQUARTZ_EXPORTS_LAUNCHD_FD
extern int xquartz_launchd_fd;
#endif

int
TRANS(MakeAllCOTSServerListeners) (const char *port, int *partial,
                                   int *count_ret, XtransConnInfo **ciptrs_ret)

{
    char		buffer[256]; /* ??? What size ?? */
    XtransConnInfo	ciptr, temp_ciptrs[NUMTRANS];
    int			status, i, j;

#if defined(IPv6) && defined(AF_INET6)
    int		ipv6_succ = 0;
#endif
    prmsg (2,"MakeAllCOTSServerListeners(%s,%p)\n",
	   port ? port : "NULL", ciptrs_ret);

*count_ret = 0;

#ifdef XQUARTZ_EXPORTS_LAUNCHD_FD
    fprintf(stderr, "Launchd socket fd: %d\n", xquartz_launchd_fd);
    if(xquartz_launchd_fd != -1) {
        if((ciptr = TRANS(ReopenCOTSServer(TRANS_SOCKET_LOCAL_INDEX,
                                           xquartz_launchd_fd, getenv("DISPLAY"))))==NULL)
            fprintf(stderr,"Got NULL while trying to Reopen launchd port\n");
        else
            temp_ciptrs[(*count_ret)++] = ciptr;
    }
#endif

if (receive_listening_fds(port, temp_ciptrs, count_ret) < 0)
	return -1;

for (i = 0; i < NUMTRANS; i++)
    {
	Xtransport *trans = Xtransports[i].transport;
	unsigned int flags = 0;

if (trans->flags&TRANS_ALIAS || trans->flags&TRANS_NOLISTEN ||
	    trans->flags&TRANS_RECEIVED)
	    continue;

snprintf(buffer, sizeof(buffer), "%s/:%s",
		 trans->TransName, port ? port : "");

prmsg (5,"MakeAllCOTSServerListeners: opening %s\n",
	       buffer);

if ((ciptr = TRANS(OpenCOTSServer(buffer))) == NULL)
	{
	    if (trans->flags & TRANS_DISABLED)
		continue;

prmsg (1,
	  "MakeAllCOTSServerListeners: failed to open listener for %s\n",
		  trans->TransName);
	    continue;
	}
#if defined(IPv6) && defined(AF_INET6)
		if ((Xtransports[i].transport_id == TRANS_SOCKET_INET_INDEX
		     && ipv6_succ))
		    flags |= ADDR_IN_USE_ALLOWED;
#endif

if ((status = TRANS(CreateListener (ciptr, port, flags))) < 0)
	{
	    if (status == TRANS_ADDR_IN_USE)
	    {
		/*
		 * We failed to bind to the specified address because the
		 * address is in use.  It must be that a server is already
		 * running at this address, and this function should fail.
		 */

prmsg (1,
		"MakeAllCOTSServerListeners: server already running\n");

for (j = 0; j < *count_ret; j++)
		    TRANS(Close) (temp_ciptrs[j]);

*count_ret = 0;
		*ciptrs_ret = NULL;
		*partial = 0;
		return -1;
	    }
	    else
	    {
		prmsg (1,
	"MakeAllCOTSServerListeners: failed to create listener for %s\n",
		  trans->TransName);

continue;
	    }
	}

#if defined(IPv6) && defined(AF_INET6)
	if (Xtransports[i].transport_id == TRANS_SOCKET_INET6_INDEX)
	    ipv6_succ = 1;
#endif

prmsg (5,
	      "MakeAllCOTSServerListeners: opened listener for %s, %d\n",
	      trans->TransName, ciptr->fd);

temp_ciptrs[*count_ret] = ciptr;
	(*count_ret)++;
    }

*partial = (*count_ret < complete_network_count());

prmsg (5,
     "MakeAllCOTSServerListeners: partial=%d, actual=%d, complete=%d \n",
	*partial, *count_ret, complete_network_count());

if (*count_ret > 0)
    {
	if ((*ciptrs_ret = malloc (
	    *count_ret * sizeof (XtransConnInfo))) == NULL)
	{
	    return -1;
	}

for (i = 0; i < *count_ret; i++)
	{
	    (*ciptrs_ret)[i] = temp_ciptrs[i];
	}
    }
    else
	*ciptrs_ret = NULL;

return 0;
}

#endif /* TRANS_SERVER */

/*
 * These routines are not part of the X Transport Interface, but they
 * may be used by it.
 */

#ifdef WIN32

/*
 * emulate readv
 */

static int TRANS(ReadV) (XtransConnInfo ciptr, struct iovec *iov, int iovcnt)

{
    int i, len, total;
    char *base;

ESET(0);
    for (i = 0, total = 0;  i < iovcnt;  i++, iov++) {
	len = iov->iov_len;
	base = iov->iov_base;
	while (len > 0) {
	    register int nbytes;
	    nbytes = TRANS(Read) (ciptr, base, len);
	    if (nbytes < 0 && total == 0)  return -1;
	    if (nbytes <= 0)  return total;
	    ESET(0);
	    len   -= nbytes;
	    total += nbytes;
	    base  += nbytes;
	}
    }
    return total;
}

/*
 * emulate writev
 */

static int TRANS(WriteV) (XtransConnInfo ciptr, struct iovec *iov, int iovcnt)

{
    int i, len, total;
    char *base;

ESET(0);
    for (i = 0, total = 0;  i < iovcnt;  i++, iov++) {
	len = iov->iov_len;
	base = iov->iov_base;
	while (len > 0) {
	    register int nbytes;
	    nbytes = TRANS(Write) (ciptr, base, len);
	    if (nbytes < 0 && total == 0)  return -1;
	    if (nbytes <= 0)  return total;
	    ESET(0);
	    len   -= nbytes;
	    total += nbytes;
	    base  += nbytes;
	}
    }
    return total;
}

#endif /* WIN32 */

#if defined(_POSIX_SOURCE) || defined(USG) || defined(SVR4) || defined(__SVR4) || defined(__SCO__)
#ifndef NEED_UTSNAME
#define NEED_UTSNAME
#endif
#include <sys/utsname.h>
#endif

/*
 * TRANS(GetHostname) - similar to gethostname but allows special processing.
 */

int TRANS(GetHostname) (char *buf, int maxlen)

{
    int len;

#ifdef NEED_UTSNAME
    struct utsname name;

uname (&name);
    len = strlen (name.nodename);
    if (len >= maxlen) len = maxlen - 1;
    strncpy (buf, name.nodename, len);
    buf[len] = '\0';
#else
    buf[0] = '\0';
    (void) gethostname (buf, maxlen);
    buf [maxlen - 1] = '\0';
    len = strlen(buf);
#endif /* NEED_UTSNAME */
    return len;
}