new file mode 100644
--- /dev/null
+++ b/packages/redboot/current/src/net/udp.c
@@ -0,0 +1,252 @@
+//==========================================================================
+//
+//      net/udp.c
+//
+//      Stand-alone UDP networking support for RedBoot
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    gthomas
+// Contributors: gthomas
+// Date:         2000-07-14
+// Purpose:      
+// Description:  
+//              
+// This code is part of RedBoot (tm).
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+
+#include <net/net.h>
+
+#ifdef UDP_STATS
+static int udp_rx_total;
+static int udp_rx_handled;
+static int udp_rx_cksum;
+static int udp_rx_dropped;
+#endif
+
+#define MAX_UDP_DATA (ETH_MAX_PKTLEN - (sizeof(eth_header_t) + \
+					sizeof(ip_header_t)  + \
+					sizeof(udp_header_t)))
+
+/*
+ * A major assumption is that only a very small number of sockets will
+ * active, so a simple linear search of those sockets is acceptible.
+ */
+static udp_socket_t *udp_list;
+
+
+/*
+ * Install a handler for incoming udp packets.
+ * Caller provides the udp_socket_t structure.
+ * Returns zero if successful, -1 if socket is already used.
+ */
+int
+__udp_install_listener(udp_socket_t *s, word port, udp_handler_t handler)
+{
+    udp_socket_t *p;
+
+    /*
+     * Make sure we only have one handler per port.
+     */
+    for (p = udp_list; p; p = p->next)
+	if (p->our_port == port)
+	    return -1;
+    
+    s->our_port = htons(port);
+    s->handler = handler;
+    s->next = udp_list;
+    udp_list = s;
+
+    return 0;
+}
+
+
+/*
+ * Remove the handler for the given socket.
+ */
+void
+__udp_remove_listener(word port)
+{
+    udp_socket_t *prev, *s;
+
+    for (prev = NULL, s = udp_list; s; prev = s, s = s->next)
+	if (s->our_port == htons(port)) {
+	    if (prev)
+		prev->next = s->next;
+	    else
+		udp_list = s->next;
+	}
+}
+
+
+/*
+ * Handle incoming UDP packets.
+ */
+void
+__udp_handler(pktbuf_t *pkt, ip_route_t *r)
+{
+    udp_header_t *udp = pkt->udp_hdr;
+    ip_header_t  *ip = pkt->ip_hdr;
+    udp_socket_t *s;
+
+    if (udp->checksum == 0xffff)
+	udp->checksum = 0;
+
+    /* copy length for pseudo sum calculation */
+    ip->length = udp->length;
+
+    if (__sum((word *)udp, ntohs(udp->length), __pseudo_sum(ip)) == 0) {
+	for (s = udp_list; s; s = s->next) {
+	    if (s->our_port == udp->dest_port) {
+		(*s->handler)(s, ((char *)udp) + sizeof(udp_header_t),
+			      ntohs(udp->length) - sizeof(udp_header_t),
+			      r, ntohs(udp->src_port));
+                __pktbuf_free(pkt);
+		return;
+	    }
+	}
+    }
+    __pktbuf_free(pkt);
+}
+
+
+/*
+ * Send a UDP packet.
+ */
+void
+__udp_send(char *buf, int len, ip_route_t *dest_ip,
+	   word dest_port, word src_port)
+{
+    pktbuf_t *pkt;
+    udp_header_t *udp;
+    ip_header_t *ip;
+    unsigned short cksum;
+
+
+    /* dumb */
+    if (len > MAX_UDP_DATA)
+	return;
+
+    /* just drop it if can't get a buffer */
+    if ((pkt = __pktbuf_alloc(ETH_MAX_PKTLEN)) == NULL)
+	return;
+
+    udp = pkt->udp_hdr;
+    ip = pkt->ip_hdr;
+
+    pkt->pkt_bytes = len + sizeof(udp_header_t);
+
+    udp->src_port = htons(src_port);
+    udp->dest_port = htons(dest_port);
+    udp->length = htons(pkt->pkt_bytes);
+    udp->checksum = 0;
+
+    memcpy(((char *)udp) + sizeof(udp_header_t), buf, len);
+
+    /* fill in some pseudo-header fields */
+    memcpy(ip->source, __local_ip_addr, sizeof(ip_addr_t));
+    memcpy(ip->destination, dest_ip->ip_addr, sizeof(ip_addr_t));
+    ip->protocol = IP_PROTO_UDP;
+    ip->length = udp->length;
+
+    cksum = __sum((word *)udp, pkt->pkt_bytes, __pseudo_sum(ip));
+    udp->checksum = htons(cksum);
+
+    __ip_send(pkt, IP_PROTO_UDP, dest_ip);
+
+    __pktbuf_free(pkt);
+}
+
+int
+__udp_sendto(char *data, int len, struct sockaddr_in *server, 
+             struct sockaddr_in *local)
+{
+    ip_route_t rt;
+
+    if (__arp_lookup(&server->sin_addr, &rt) < 0) {
+        printf("%s: Can't find address of server\n", __FUNCTION__);
+        return -1;
+    } else {
+	__udp_send(data, len, &rt, ntohs(server->sin_port), ntohs(local->sin_port));
+        return 0;
+    }
+}
+
+static char               *recvfrom_buf;
+static int                 recvfrom_len;
+static struct sockaddr_in *recvfrom_server;
+
+static void
+__udp_recvfrom_handler(udp_socket_t *skt, char *buf, int len,
+                       ip_route_t *src_route, word src_port)
+{
+    // Move data to waiting buffer
+    recvfrom_len = len;
+    memcpy(recvfrom_buf, buf, len);
+    if (recvfrom_server) {
+        recvfrom_server->sin_port = htons(src_port);
+        memcpy(&recvfrom_server->sin_addr, &src_route->ip_addr, sizeof(src_route->ip_addr));
+        recvfrom_buf = (char *)0;  // Tell reader we got a packet
+    } else {
+        printf("udp_recvfrom - dropped packet of %d bytes\n", len);
+    }
+}
+
+int
+__udp_recvfrom(char *data, int len, struct sockaddr_in *server, 
+               struct sockaddr_in *local, struct timeval *timo)
+{
+    int res, my_port, total_ms;
+    udp_socket_t skt;
+    unsigned long start;
+
+    my_port = ntohs(local->sin_port);
+    if (__udp_install_listener(&skt, my_port, __udp_recvfrom_handler) < 0) {
+        return -1;
+    }
+    recvfrom_buf = data;
+    recvfrom_len = len;
+    recvfrom_server = server;
+    total_ms = (timo->tv_sec * 1000) + (timo->tv_usec / 1000);
+    start = MS_TICKS();
+    res = -1;
+    while ((MS_TICKS() - start) < total_ms) {
+        __enet_poll();  // Handle the hardware
+        if (!recvfrom_buf) {
+            // Data have arrived
+            res = recvfrom_len;
+            break;
+        }
+    }
+    __udp_remove_listener(my_port);
+    return res;
+}