Added 3 new classes: WMData, WMHost, WMConnection

WINGs/host.c

@@ -0,0 +1,269 @@
+/*
+ *  WINGs WMHost function library
+ * 
+ *  Copyright (c) 1999 Dan Pascu
+ * 
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+
+#include <unistd.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "WUtil.h"
+
+
+typedef struct W_Host {
+    char   *name;
+
+    WMBag  *names;
+    WMBag  *addresses;
+    int    nameCount;
+    int    addressCount;
+
+    int    refCount;
+} W_Host;
+
+
+static WMHashTable *hostCache = NULL;
+static Bool hostCacheEnabled = True;
+
+
+/* Max hostname length (RFC  1123) */
+#define	W_MAXHOSTNAMELEN	255
+
+WMHost*
+WMGetCurrentHost()
+{
+    char name[W_MAXHOSTNAMELEN+1];
+
+    if (gethostname(name, W_MAXHOSTNAMELEN) < 0) {
+        wsyserror("Cannot get current host name");
+        return NULL;
+    }
+
+    name[W_MAXHOSTNAMELEN] = '\0';
+
+    return WMGetHostWithName(name);
+}
+
+
+WMHost*
+WMGetHostWithName(char* name)
+{
+    struct hostent *host;
+    struct in_addr in;
+    WMHost *hPtr;
+    int i;
+
+    if (name == NULL) {
+        wwarning("NULL host name in 'WMGetHostWithName()'");
+        return NULL;
+    }
+
+    if (!hostCache)
+        hostCache = WMCreateHashTable(WMStringPointerHashCallbacks);
+
+    hPtr = WMHashGet(hostCache, name);
+    if (hPtr) {
+        WMRetainHost(hPtr);
+        return hPtr;
+    }
+
+    host = gethostbyname(name);
+    if (host == NULL) {
+        wwarning("Invalid host name/address '%s'", name);
+        return NULL;
+    }
+
+    hPtr = (WMHost*)wmalloc(sizeof(WMHost));
+    memset(hPtr, 0, sizeof(WMHost));
+
+    hPtr->names = WMCreateBag(1);
+    hPtr->addresses = WMCreateBag(1);
+
+    WMPutInBag(hPtr->names, wstrdup(host->h_name));
+
+    for (i=0; host->h_aliases[i]!=NULL; i++) {
+        WMPutInBag(hPtr->names, wstrdup(host->h_aliases[i]));
+    }
+
+    hPtr->nameCount = WMGetBagItemCount(hPtr->names);
+
+    for (i=0; host->h_addr_list[i]!=NULL; i++) {
+        memcpy((void*)&in.s_addr, (const void*)host->h_addr_list[i],
+               host->h_length);
+        WMPutInBag(hPtr->addresses, wstrdup(inet_ntoa(in)));
+    }
+
+    hPtr->addressCount = WMGetBagItemCount(hPtr->addresses);
+
+    hPtr->refCount = 1;
+
+    if (hostCacheEnabled) {
+        hPtr->name = wstrdup(name);
+        wassertr(WMHashInsert(hostCache, hPtr->name, hPtr)==NULL);
+        hPtr->refCount++;
+    }
+
+    return hPtr;
+}
+
+
+WMHost*
+WMGetHostWithAddress(char* address)
+{
+    if (address == NULL) {
+        wwarning("NULL address in 'WMGetHostWithAddress()'");
+        return NULL;
+    }
+
+    return WMGetHostWithName(address);
+#if 0
+    hostaddr.s_addr = inet_addr((char*)[address cString]);
+    if (hostaddr.s_addr == -1) {
+        return NULL;
+    }
+
+    h = gethostbyaddr((char*)&hostaddr, sizeof(hostaddr), AF_INET);
+#endif
+}
+
+
+WMHost*
+WMRetainHost(WMHost *hPtr)
+{
+    hPtr->refCount++;
+    return hPtr;
+}
+
+
+void
+WMReleaseHost(WMHost *hPtr)
+{
+    int i;
+
+    hPtr->refCount--;
+
+    if (hPtr->refCount > 0)
+        return;
+
+    for (i=0; i<WMGetBagItemCount(hPtr->names); i++)
+        wfree(WMGetFromBag(hPtr->names, i));
+    for (i=0; i<WMGetBagItemCount(hPtr->addresses); i++)
+        wfree(WMGetFromBag(hPtr->addresses, i));
+
+    WMFreeBag(hPtr->names);
+    WMFreeBag(hPtr->addresses);
+
+    if (hPtr->name) {
+        WMHashRemove(hostCache, hPtr->name);
+        wfree(hPtr->name);
+    }
+
+    wfree(hPtr);
+}
+
+
+void
+WMSetHostCacheEnabled(Bool flag)
+{
+    hostCacheEnabled = flag;
+}
+
+
+Bool
+WMIsHostCacheEnabled()
+{
+    return hostCacheEnabled;
+}
+
+
+void
+WMFlushHostCache()
+{
+    if (hostCache && WMCountHashTable(hostCache)>0) {
+        WMBag *hostBag = WMCreateBag(WMCountHashTable(hostCache));
+        WMHashEnumerator enumer = WMEnumerateHashTable(hostCache);
+        WMHost *hPtr;
+        int i;
+
+        while ((hPtr = WMNextHashEnumeratorItem(&enumer))) {
+            /* we can't release the host here, because we can't change the
+             * hash while using the enumerator functions. */
+            WMPutInBag(hostBag, hPtr);
+        }
+        for (i=0; i<WMGetBagItemCount(hostBag); i++)
+            WMReleaseHost(WMGetFromBag(hostBag, i));
+        WMFreeBag(hostBag);
+        WMResetHashTable(hostCache);
+    }
+}
+
+
+Bool
+WMIsHostEqualToHost(WMHost* hPtr, WMHost* aPtr)
+{
+    int	i;
+
+    wassertrv(hPtr!=NULL && aPtr!=NULL, False);
+
+    if (hPtr == aPtr)
+        return True;
+
+    for (i=0; i<aPtr->addressCount; i++) {
+        if (WMGetFirstInBag(hPtr->addresses, WMGetFromBag(aPtr->addresses, i)))
+            return True;
+    }
+
+    return False;
+}
+
+
+char*
+WMGetHostName(WMHost *hPtr)
+{
+    return WMGetFromBag(hPtr->names, 0);
+}
+
+
+WMBag*
+WMGetHostNames(WMHost *hPtr)
+{
+    return hPtr->names;
+}
+
+
+char*
+WMGetHostAddress(WMHost *hPtr)
+{
+    return (hPtr->addressCount > 0 ? WMGetFromBag(hPtr->addresses, 0) : NULL);
+}
+
+
+WMBag*
+WMGetHostAddresses(WMHost *hPtr)
+{
+    return hPtr->addresses;
+}
+
+
+
+