Index: DHCP/RELNOTES
diff -u DHCP/RELNOTES:1.462 DHCP/RELNOTES:1.462.4.2
--- DHCP/RELNOTES:1.462	Thu Feb 16 22:07:04 2012
+++ DHCP/RELNOTES	Tue Feb 28 15:44:01 2012
@@ -49,6 +49,14 @@
   to perform an fsync() operation on the lease database before reply,
   which improves performance. [ISC-Bugs #22228]
 
+*** mergeme
+- A problem with missing get_hw_addr function when --enable-use-sockets
+  was used is now solved on GNU/Linux, BSD and GNU/Hurd systems. Note
+  that use-sockets feature was not tested on those systems. Client and
+  server code no longer use MAX_PATH constant that is not defined on
+  GNU/Hurd systems. [ISC-Bugs 25979]
+*** mergeme
+
 			Changes since 4.2.3
 
 ! Add a check for a null pointer before calling the regexec function.
Index: DHCP/client/dhclient.c
diff -u DHCP/client/dhclient.c:1.185 DHCP/client/dhclient.c:1.185.4.1
--- DHCP/client/dhclient.c:1.185	Fri Feb  3 22:47:42 2012
+++ DHCP/client/dhclient.c	Tue Feb 28 15:44:01 2012
@@ -374,21 +374,17 @@
 	 * to be reopened after chdir() has been called
 	 */
 	if (path_dhclient_db[0] != '/') {
-		char *path = dmalloc(PATH_MAX, MDL);
-		if (path == NULL)
-			log_fatal("No memory for filename\n");
-		path_dhclient_db = realpath(path_dhclient_db, path);
+		const char *old_path = path_dhclient_db;
+		path_dhclient_db = realpath(path_dhclient_db, NULL);
 		if (path_dhclient_db == NULL)
-			log_fatal("%s: %s", path, strerror(errno));
+			log_fatal("Failed to get realpath for %s: %s", old_path, strerror(errno));
 	}
 
 	if (path_dhclient_script[0] != '/') {
-		char *path = dmalloc(PATH_MAX, MDL);
-		if (path == NULL)
-			log_fatal("No memory for filename\n");
-		path_dhclient_script = realpath(path_dhclient_script, path);
+		const char *old_path = path_dhclient_script;
+		path_dhclient_script = realpath(path_dhclient_script, NULL);
 		if (path_dhclient_script == NULL)
-			log_fatal("%s: %s", path, strerror(errno));
+			log_fatal("Failed to get realpath for %s: %s", old_path, strerror(errno));
 	}
 
 	/*
Index: DHCP/common/bpf.c
diff -u DHCP/common/bpf.c:1.62 DHCP/common/bpf.c:1.62.202.1
--- DHCP/common/bpf.c:1.62	Tue Nov 24 02:06:56 2009
+++ DHCP/common/bpf.c	Tue Feb 28 15:15:18 2012
@@ -550,7 +550,9 @@
 		interface_dereference (&fbi, MDL);
 	}
 }
+#endif
 
+#if defined(USE_BPF_RECEIVE) || defined(USE_BPF_HWADDR)
 void
 get_hw_addr(const char *name, struct hardware *hw) {
 	struct ifaddrs *ifa;
Index: DHCP/common/lpf.c
diff -u DHCP/common/lpf.c:1.41 DHCP/common/lpf.c:1.41.64.1
--- DHCP/common/lpf.c:1.41	Tue May 10 14:27:56 2011
+++ DHCP/common/lpf.c	Tue Feb 28 15:15:18 2012
@@ -28,7 +28,6 @@
 
 #include "dhcpd.h"
 #if defined (USE_LPF_SEND) || defined (USE_LPF_RECEIVE)
-#include <sys/ioctl.h>
 #include <sys/uio.h>
 #include <errno.h>
 
@@ -40,8 +39,14 @@
 #include "includes/netinet/ip.h"
 #include "includes/netinet/udp.h"
 #include "includes/netinet/if_ether.h"
+#endif
+
+#if defined (USE_LPF_RECEIVE) || defined (USE_LPF_HWADDR)
+#include <sys/ioctl.h>
 #include <net/if.h>
+#endif
 
+#if defined (USE_LPF_SEND) || defined (USE_LPF_RECEIVE)
 /* Reinitializes the specified interface after an address change.   This
    is not required for packet-filter APIs. */
 
@@ -417,7 +422,9 @@
 		interface_dereference (&fbi, MDL);
 	}
 }
+#endif
 
+#if defined (USE_LPF_RECEIVE) || defined (USE_LPF_HWADDR)
 void
 get_hw_addr(const char *name, struct hardware *hw) {
 	int sock;
Index: DHCP/includes/osdep.h
diff -u DHCP/includes/osdep.h:1.44 DHCP/includes/osdep.h:1.44.122.1
--- DHCP/includes/osdep.h:1.44	Thu Sep  9 22:18:02 2010
+++ DHCP/includes/osdep.h	Tue Feb 28 15:15:16 2012
@@ -108,6 +108,10 @@
 #  define USE_SOCKET_RECEIVE
 #  if defined(HAVE_DLPI)
 #    define USE_DLPI_HWADDR
+#  elif defined(HAVE_LPF)
+#    define USE_LPF_HWADDR
+#  elif defined(HAVE_BPF)
+#    define USE_BPF_HWADDR
 #  endif
 #endif
 
Index: DHCP/server/dhcpd.c
diff -u DHCP/server/dhcpd.c:1.158 DHCP/server/dhcpd.c:1.158.76.1
--- DHCP/server/dhcpd.c:1.158	Thu Apr 21 13:24:24 2011
+++ DHCP/server/dhcpd.c	Tue Feb 28 15:44:01 2012
@@ -464,12 +464,11 @@
          * to be reopened after chdir() has been called
          */
         if (path_dhcpd_db[0] != '/') {
-                char *path = dmalloc(PATH_MAX, MDL);
-                if (path == NULL)
-                        log_fatal("No memory for filename\n");
-                path_dhcpd_db = realpath(path_dhcpd_db,  path);
+				const char *path = path_dhcpd_db;
+                path_dhcpd_db = realpath(path_dhcpd_db, NULL);
                 if (path_dhcpd_db == NULL)
-                        log_fatal("%s: %s", path, strerror(errno));
+                        log_fatal("Failed to get realpath for %s: %s", path, 
+                                   strerror(errno));
         }
 
 	if (!quiet) {