--- net-snmp-5.4.1/agent/mibgroup/kernel_sunos5.c	Tue Apr 24 14:13:10 2012
+++ kernel_sunos5.c.latest	Tue Apr 24 14:11:58 2012
@@ -1045,18 +1045,21 @@
 static int
 _dlpi_open(const char *devname)
 {
-    char *devstr;
+    char devstr[255], devstrcpy[255];
     int fd = -1;
     int ppa = -1;
+    int ret = -1; 	
 
     DEBUGMSGTL(("kernel_sunos5", "_dlpi_open called\n"));
 
     if (devname == NULL)
-        return (-1);
+	return (-1);
+    
+    ret = snprintf(devstr, sizeof(devstr), "/dev/%s", devname);
 
-    if ((devstr = malloc(5 + strlen(devname) + 1)) == NULL)
-        return (-1);
-    (void) sprintf(devstr, "/dev/%s", devname);
+    if(ret < 0 || ret > sizeof(devstr) - 1)
+	return -1;
+    
     DEBUGMSGTL(("kernel_sunos5:dlpi", "devstr(%s)\n", devstr));
     /*
      * First try opening the device using style 1, if the device does not
@@ -1067,13 +1070,49 @@
     DEBUGMSGTL(("kernel_sunos5:dlpi", "style1 open(%s)\n", devstr));
     if ((fd = open(devstr, O_RDWR | O_NONBLOCK)) < 0) {
         DEBUGMSGTL(("kernel_sunos5:dlpi", "style1 open failed\n"));
-        if (_dlpi_parse_devname(devstr, &ppa) == 0) {
-            DEBUGMSGTL(("kernel_sunos5:dlpi", "style2 parse: %s, %d\n", 
-                       devstr, ppa));
-            /* try style 2 */
-            DEBUGMSGTL(("kernel_sunos5:dlpi", "style2 open(%s)\n", devstr));
+	fd = -1;
+    } else {
+      DEBUGMSGTL(("kernel_sunos5:dlpi", "style1 open succeeded\n"));
+    }
 
-            if ((fd = open(devstr, O_RDWR | O_NONBLOCK)) != -1) {
+    /* Creating a copy of the devname incase style 3 open
+     *  is required
+     */
+    ret = strlcpy(devstrcpy, devstr, sizeof(devstrcpy));
+
+    if(ret > sizeof(devstrcpy) - 1)
+        return -1;
+
+    DEBUGMSGTL(("kernel_sunos5:dlpi", "devstrcpy(%s)\n", devstrcpy));
+
+
+    if (fd == -1 ) {
+      ret = snprintf(devstr, sizeof(devstr), "/dev/net/%s", devname);
+      
+      if(ret < 0 || ret > sizeof(devstr) - 1)
+          return -1;
+
+      DEBUGMSGTL(("kernel_sunos5:dlpi", "devstr(%s)\n", devstr));
+      
+      /* try style 2 */
+
+     if ((fd = open(devstr, O_RDWR | O_NONBLOCK)) < 0) {
+        DEBUGMSGTL(("kernel_sunos5:dlpi", "style2 open failed\n"));
+	fd = -1;
+      } else {
+	DEBUGMSGTL(("kernel_sunos5:dlpi", "style2 open succeeded\n"));
+      }
+    }
+    
+
+    if (fd == -1 ) {
+        if (_dlpi_parse_devname(devstrcpy, &ppa) == 0) {
+            DEBUGMSGTL(("kernel_sunos5:dlpi", "style3 parse: %s, %d\n", 
+                       devstrcpy, ppa));
+            /* try style 3 */
+            DEBUGMSGTL(("kernel_sunos5:dlpi", "style3 open(%s)\n", devstrcpy));
+
+            if ((fd = open(devstrcpy, O_RDWR | O_NONBLOCK)) != -1) {
                 if (_dlpi_attach(fd, ppa) == 0) {
                     DEBUGMSGTL(("kernel_sunos5:dlpi", "attached\n"));
                 } else {
@@ -1082,16 +1121,11 @@
                     fd = -1;
                 }
             } else {
-                DEBUGMSGTL(("kernel_sunos5:dlpi", "style2 open failed\n"));
+                DEBUGMSGTL(("kernel_sunos5:dlpi", "style3 open failed\n"));
             }
         } 
-    } else {
-        DEBUGMSGTL(("kernel_sunos5:dlpi", "style1 open succeeded\n"));
     }
 
-    /* clean up */
-    free(devstr);
-
     return (fd);
 }
 
@@ -1106,7 +1140,9 @@
     struct strbuf       ctlbuf;
     char                buf[MAX(DL_PHYS_ADDR_ACK_SIZE+64, DL_ERROR_ACK_SIZE)];
     int                 flag = 0;
-
+    struct pollfd 		pfd;
+    int			timeout = 100;
+	
     DEBUGMSGTL(("kernel_sunos5:dlpi", "_dlpi_get_phys_address\n"));
 
     paddr_req.dl_primitive = DL_PHYS_ADDR_REQ;
@@ -1119,7 +1155,22 @@
     ctlbuf.maxlen = sizeof(buf);
     ctlbuf.len = 0;
     ctlbuf.buf = buf;
-    if (getmsg(fd, &ctlbuf, NULL, &flag) < 0)
+
+    pfd.fd = fd;
+    pfd.events = POLLIN | POLLPRI;
+
+    switch (poll(&pfd, 1, timeout)) {
+    default:
+	if (pfd.revents & POLLHUP)
+    	    return (-1);
+   	break;
+    case 0:
+    	return (-1);
+    case -1:
+    	return (-1);
+    }
+    
+	if (getmsg(fd, &ctlbuf, NULL, &flag) < 0)
         return (-1);
 
     if (ctlbuf.len < sizeof(uint32_t))
@@ -1161,6 +1212,8 @@
     struct strbuf       ctlbuf;
     char                buf[MAX(DL_INFO_ACK_SIZE, DL_ERROR_ACK_SIZE)];
     int                 flag = 0;
+    struct pollfd       pfd;
+    int                 timeout = 100;
 
     DEBUGMSGTL(("kernel_sunos5:dlpi", "_dlpi_get_iftype\n"));
 
@@ -1175,7 +1228,22 @@
     ctlbuf.maxlen = sizeof(buf);
     ctlbuf.len = 0;
     ctlbuf.buf = buf;
-    if (getmsg(fd, &ctlbuf, NULL, &flag) < 0) {
+   
+    pfd.fd = fd;
+    pfd.events = POLLIN | POLLPRI;
+
+    switch (poll(&pfd, 1, timeout)) {
+    default:
+        if (pfd.revents & POLLHUP)
+            return (-1);
+        break;
+    case 0:
+        return (-1);
+    case -1:
+        return (-1);
+    } 
+
+	if (getmsg(fd, &ctlbuf, NULL, &flag) < 0) {
         DEBUGMSGTL(("kernel_sunos5:dlpi", "getmsg failed: %d\n", errno));
         return (-1);
     }