diff packages/redboot/current/src/net/bootp.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents
children 25e238959bae
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new file mode 100644
--- /dev/null
+++ b/packages/redboot/current/src/net/bootp.c
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+//==========================================================================
+//
+//      net/bootp.c
+//
+//      Stand-alone minimal BOOTP 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>
+#include <net/bootp.h>
+
+extern int net_debug;
+
+#define SHOULD_BE_RANDOM  0x12345555
+
+/* How many milliseconds to wait before retrying the request */
+#define RETRY_TIME  2000
+
+static bootp_header_t *bp_info;
+
+static void
+bootp_handler(udp_socket_t *skt, char *buf, int len,
+	      ip_route_t *src_route, word src_port)
+{
+    bootp_header_t *b;
+
+    b = (bootp_header_t *)buf;
+    if (bp_info) {
+        memcpy(bp_info, b, len);
+    }
+
+    if (b->bp_op == BOOTREPLY && 
+	!memcmp(b->bp_chaddr, __local_enet_addr, 6)) {
+	memcpy(__local_ip_addr, &b->bp_yiaddr, 4);
+    }
+}
+
+
+/*
+ * Find our IP address and copy to __local_ip_addr.
+ * Return zero if successful, -1 if not.
+ */
+int
+__bootp_find_local_ip(bootp_header_t *info)
+{
+    udp_socket_t udp_skt;
+    bootp_header_t b;
+    ip_route_t     r;
+    int            retry;
+    unsigned long  start;
+
+    bp_info = info;
+
+    memset(&b, 0, sizeof(b));
+
+    b.bp_op = BOOTREQUEST;
+    b.bp_htype = HTYPE_ETHERNET;
+    b.bp_hlen = 6;
+    b.bp_xid = SHOULD_BE_RANDOM;
+
+    __local_ip_addr[0] = 0;
+    __local_ip_addr[1] = 0;
+    __local_ip_addr[2] = 0;
+    __local_ip_addr[3] = 0;
+
+    memcpy(b.bp_chaddr, __local_enet_addr, 6);
+
+    /* fill out route for a broadcast */
+    r.ip_addr[0] = 255;
+    r.ip_addr[1] = 255;
+    r.ip_addr[2] = 255;
+    r.ip_addr[3] = 255;
+    r.enet_addr[0] = 255;
+    r.enet_addr[1] = 255;
+    r.enet_addr[2] = 255;
+    r.enet_addr[3] = 255;
+    r.enet_addr[4] = 255;
+    r.enet_addr[5] = 255;
+
+    /* setup a socket listener for bootp replies */
+    __udp_install_listener(&udp_skt, IPPORT_BOOTPC, bootp_handler);
+
+    retry = 3;
+    while (retry-- > 0) {
+	start = MS_TICKS();
+
+	__udp_send((char *)&b, sizeof(b), &r, IPPORT_BOOTPS, IPPORT_BOOTPC);
+
+	do {
+	    __enet_poll();
+	    if (__local_ip_addr[0] || __local_ip_addr[1] ||
+		__local_ip_addr[2] || __local_ip_addr[3]) {
+		/* success */
+		__udp_remove_listener(IPPORT_BOOTPC);
+		return 0;
+	    }
+	} while ((MS_TICKS() - start) < RETRY_TIME);
+    }
+
+    /* timed out */
+    __udp_remove_listener(IPPORT_BOOTPC);
+    net_debug = 0;
+    return -1;
+}
+
+