R6.6 is the Xorg base-lineXORG-MAINXORG-STABLE

1 files changed, 283 insertions, 0 deletions

diff --git a/gethost.c b/gethost.c
new file mode 100644
index 0000000..bd71bc1
--- /dev/null
+++ b/gethost.c
@@ -0,0 +1,283 @@
+/*
+ * $Xorg: gethost.c,v 1.5 2001/02/09 02:05:38 xorgcvs Exp $
+ *
+ * 
+Copyright 1989, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+ * *
+ * Author:  Jim Fulton, MIT X Consortium
+ */
+
+/* sorry, streams support does not really work yet */
+#if defined(STREAMSCONN) && defined(SVR4)
+#undef STREAMSCONN
+#define TCPCONN
+#endif
+
+#ifdef WIN32
+#include <X11/Xwinsock.h>
+#define EPROTOTYPE WSAEPROTOTYPE
+#endif
+#include "xauth.h"
+#include <X11/X.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <ctype.h>
+#ifndef __TYPES__
+#include <sys/types.h>
+#define __TYPES__
+#endif
+#ifndef WIN32
+#ifndef STREAMSCONN
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#ifdef SYSV
+#ifdef i386
+#ifndef sco
+#include <net/errno.h>
+#endif /* !sco */
+#endif /* i386 */
+#endif /* SYSV */
+#endif /* !STREAMSCONN */
+#endif /* !WIN32 */
+#include <errno.h>
+#ifdef X_NOT_STDC_ENV
+extern int errno;
+#endif
+
+#ifdef DNETCONN
+#include <netdnet/dn.h>
+#include <netdnet/dnetdb.h>
+#endif
+
+#ifdef SIGALRM
+Bool nameserver_timedout = False;
+
+
+/*
+ * get_hostname - Given an internet address, return a name (CHARON.MIT.EDU)
+ * or a string representing the address (18.58.0.13) if the name cannot
+ * be found.  Stolen from xhost.
+ */
+
+static jmp_buf env;
+static 
+#ifdef SIGNALRETURNSINT
+int
+#else
+void
+#endif
+nameserver_lost(sig)
+{
+  nameserver_timedout = True;
+  longjmp (env, -1);
+  /* NOTREACHED */
+#ifdef SIGNALRETURNSINT
+  return -1;				/* for picky compilers */
+#endif
+}
+#endif
+
+char *get_hostname (auth)
+    Xauth *auth;
+{
+    struct hostent *hp = NULL;
+#ifndef WIN32
+    char *inet_ntoa();
+#endif
+#ifdef DNETCONN
+    struct nodeent *np;
+    static char nodeaddr[4 + 2 * DN_MAXADDL];
+#endif /* DNETCONN */
+
+    if (auth->address_length == 0)
+	return "Illegal Address";
+#ifdef TCPCONN
+    if (auth->family == FamilyInternet) {
+#ifdef SIGALRM
+	/* gethostbyaddr can take a LONG time if the host does not exist.
+	   Assume that if it does not respond in NAMESERVER_TIMEOUT seconds
+	   that something is wrong and do not make the user wait.
+	   gethostbyaddr will continue after a signal, so we have to
+	   jump out of it. 
+	   */
+	nameserver_timedout = False;
+	signal (SIGALRM, nameserver_lost);
+	alarm (4);
+	if (setjmp(env) == 0) {
+#endif
+	    hp = gethostbyaddr (auth->address, auth->address_length, AF_INET);
+#ifdef SIGALRM
+	}
+	alarm (0);
+#endif
+	if (hp)
+	  return (hp->h_name);
+	else
+	  return (inet_ntoa(*((struct in_addr *)(auth->address))));
+    }
+#endif
+#ifdef DNETCONN
+    if (auth->family == FamilyDECnet) {
+	struct dn_naddr *addr_ptr = (struct dn_naddr *) auth->address;
+
+	if (np = getnodebyaddr(addr_ptr->a_addr, addr_ptr->a_len, AF_DECnet)) {
+	    sprintf(nodeaddr, "%s:", np->n_name);
+	} else {
+	    sprintf(nodeaddr, "%s:", dnet_htoa(auth->address));
+	}
+	return(nodeaddr);
+    }
+#endif
+
+    return (NULL);
+}
+
+#ifdef TCPCONN
+/*
+ * cribbed from lib/X/XConnDis.c
+ */
+static Bool get_inet_address (name, resultp)
+    char *name;
+    unsigned long *resultp;		/* return */
+{
+    unsigned long hostinetaddr = inet_addr (name);
+    struct hostent *host_ptr;
+    struct sockaddr_in inaddr;		/* dummy variable for size calcs */
+
+    if (hostinetaddr == -1) {		/* oh, gross.... */
+	if ((host_ptr = gethostbyname (name)) == NULL) {
+	    /* No such host! */
+	    errno = EINVAL;
+	    return False;
+	}
+	/* Check the address type for an internet host. */
+	if (host_ptr->h_addrtype != AF_INET) {
+	    /* Not an Internet host! */
+	    errno = EPROTOTYPE;
+	    return False;
+	}
+ 
+	memmove( (char *)&hostinetaddr, (char *)host_ptr->h_addr, 
+	      sizeof(inaddr.sin_addr));
+    }
+    *resultp = hostinetaddr;
+    return True;
+}
+#endif
+
+#ifdef DNETCONN
+static Bool get_dnet_address (name, resultp)
+    char *name;
+    struct dn_naddr *resultp;
+{
+    struct dn_naddr *dnaddrp, dnaddr;
+    struct nodeent *np;
+
+    if (dnaddrp = dnet_addr (name)) {	/* stolen from xhost */
+	dnaddr = *dnaddrp;
+    } else {
+	if ((np = getnodebyname (name)) == NULL) return False;
+	dnaddr.a_len = np->n_length;
+	memmove( dnaddr.a_addr, np->n_addr, np->n_length);
+    }
+    *resultp = dnaddr;
+    return True;
+}
+#endif
+
+char *get_address_info (family, fulldpyname, prefix, host, lenp)
+    int family;
+    char *fulldpyname;
+    int prefix;
+    char *host;
+    int *lenp;
+{
+    char *retval = NULL;
+    int len = 0;
+    char *src = NULL;
+#ifdef TCPCONN
+    unsigned long hostinetaddr;
+#endif
+#ifdef DNETCONN
+    struct dn_naddr dnaddr;
+#endif
+    char buf[255];
+
+    /*
+     * based on the family, set the pointer src to the start of the address
+     * information to be copied and set len to the number of bytes.
+     */
+    switch (family) {
+      case FamilyLocal:			/* hostname/unix:0 */
+					/* handle unix:0 and :0 specially */
+	if (prefix == 0 && (strncmp (fulldpyname, "unix:", 5) == 0 ||
+			    fulldpyname[0] == ':')) {
+	    extern char *get_local_hostname();
+
+	    if (!get_local_hostname (buf, sizeof buf)) {
+		len = 0;
+	    } else {
+		src = buf;
+		len = strlen (buf);
+	    }
+	} else {
+	    src = fulldpyname;
+	    len = prefix;
+	}
+	break;
+      case FamilyInternet:		/* host:0 */
+#ifdef TCPCONN
+	if (!get_inet_address (host, &hostinetaddr)) return NULL;
+	src = (char *) &hostinetaddr;
+	len = 4; /* sizeof inaddr.sin_addr, would fail on Cray */
+	break;
+#else
+	return NULL;
+#endif
+      case FamilyDECnet:		/* host::0 */
+#ifdef DNETCONN
+	if (!get_dnet_address (host, &dnaddr)) return NULL;
+	src = (char *) &dnaddr;
+	len = (sizeof dnaddr);
+	break;
+#else
+	/* fall through since we don't have code for it */
+#endif
+      default:
+	src = NULL;
+	len = 0;
+    }
+
+    /*
+     * if source was provided, allocate space and copy it
+     */
+    if (len == 0 || !src) return NULL;
+
+    retval = malloc (len);
+    if (retval) {
+	memmove( retval, src, len);
+	*lenp = len;
+    }
+    return retval;
+}