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      1 /*
      2  * Copyright  2003 Keith Packard
      3  *
      4  * Permission to use, copy, modify, distribute, and sell this software and its
      5  * documentation for any purpose is hereby granted without fee, provided that
      6  * the above copyright notice appear in all copies and that both that
      7  * copyright notice and this permission notice appear in supporting
      8  * documentation, and that the name of Keith Packard not be used in
      9  * advertising or publicity pertaining to distribution of the software without
     10  * specific, written prior permission.  Keith Packard makes no
     11  * representations about the suitability of this software for any purpose.  It
     12  * is provided "as is" without express or implied warranty.
     13  *
     14  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
     15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
     16  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
     17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
     18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
     19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
     20  * PERFORMANCE OF THIS SOFTWARE.
     21  */
     22 
     23 #include <config.h>
     24 
     25 #define FONT_t 1
     26 #define TRANS_REOPEN 1
     27 #define TRANS_SERVER 1
     28 
     29 #include <X11/Xtrans/transport.c>
     30 
     31 #ifdef XFS_INETD
     32 /* xfs special handling for listen socket passed from inetd */
     33 
     34 /* XXX duplicated from misc.h */
     35 typedef struct {		/* when cloning, need old transport info */
     36     int trans_id;
     37     int fd;
     38     int portnum;
     39 } OldListenRec;
     40 
     41 OldListenRec *
     42 TRANS(GetInetdListenInfo) (int fd)
     43 {
     44     const char *port = "0";
     45     XtransConnInfo inetdCI;
     46     OldListenRec *old_listen;
     47     int portnum;
     48 
     49     /* Create a XtransConnInfo struct for this connection */
     50     inetdCI = TRANS(ReopenCOTSServer)(TRANS_SOCKET_TCP_INDEX, fd, port);
     51 
     52     /* Fill in correct address/portnum */
     53     TRANS(SocketINETGetAddr)(inetdCI);
     54 #if defined(IPv6) && defined(AF_INET6)
     55     if ( ((struct sockaddr *)(inetdCI->addr))->sa_family == AF_INET6 )
     56 	portnum = ntohs(((struct sockaddr_in6 *)(inetdCI->addr))->sin6_port);
     57     else
     58 #endif
     59 	portnum = ntohs(((struct sockaddr_in *)(inetdCI->addr))->sin_port);
     60     inetdCI->port = malloc(6); /* Base 10 integer <= 65535 + trailing NUL */
     61     snprintf(inetdCI->port, 6, "%d", portnum);
     62 
     63     /* Do the socket setup that xtrans normally takes care of in
     64      * TRANS(SocketOpen) && TRANS(SocketCreateListener)
     65      */
     66     {
     67 	/*
     68 	 * turn off TCP coalescence for INET sockets
     69 	 */
     70 
     71 	int tmp = 1;
     72 	setsockopt (fd, IPPROTO_TCP, TCP_NODELAY,
     73 		    (char *) &tmp, sizeof (int));
     74     }
     75 #ifdef SO_DONTLINGER
     76     setsockopt (fd, SOL_SOCKET, SO_DONTLINGER, NULL, 0);
     77 #else
     78 # ifdef SO_LINGER
     79     {
     80 	static int linger[2] = { 0, 0 };
     81 	setsockopt (fd, SOL_SOCKET, SO_LINGER,
     82 		    (char *) linger, sizeof (linger));
     83     }
     84 # endif
     85 #endif
     86 
     87     if (listen (fd, BACKLOG) < 0)
     88         return NULL;
     89 
     90     /* Pass the inetd socket back through the connection setup code
     91      * the same way as a cloned listening port
     92      */
     93     old_listen =  malloc (sizeof (OldListenRec));
     94     if (old_listen != NULL) {
     95         char *old_port;
     96 	TRANS(GetReopenInfo)(inetdCI, &(old_listen->trans_id),
     97 			     &(old_listen->fd), &old_port);
     98 
     99 	old_listen->portnum = portnum;
    100     }
    101 
    102     return old_listen;
    103 }
    104 #endif /* XFS_INETD */
    105