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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: ip-output.fth | |
4 | \ | |
5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | \ | |
7 | \ - Do no alter or remove copyright notices | |
8 | \ | |
9 | \ - Redistribution and use of this software in source and binary forms, with | |
10 | \ or without modification, are permitted provided that the following | |
11 | \ conditions are met: | |
12 | \ | |
13 | \ - Redistribution of source code must retain the above copyright notice, | |
14 | \ this list of conditions and the following disclaimer. | |
15 | \ | |
16 | \ - Redistribution in binary form must reproduce the above copyright notice, | |
17 | \ this list of conditions and the following disclaimer in the | |
18 | \ documentation and/or other materials provided with the distribution. | |
19 | \ | |
20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors | |
21 | \ may be used to endorse or promote products derived from this software | |
22 | \ without specific prior written permission. | |
23 | \ | |
24 | \ This software is provided "AS IS," without a warranty of any kind. | |
25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
28 | \ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
30 | \ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
31 | \ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
32 | \ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
33 | \ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
34 | \ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
35 | \ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
36 | \ | |
37 | \ You acknowledge that this software is not designed, licensed or | |
38 | \ intended for use in the design, construction, operation or maintenance of | |
39 | \ any nuclear facility. | |
40 | \ | |
41 | \ ========== Copyright Header End ============================================ | |
42 | id: @(#)ip-output.fth 1.1 04/09/07 | |
43 | purpose: IP output routines | |
44 | copyright: Copyright 2004 Sun Microsystems, Inc. All Rights Reserved | |
45 | copyright: Use is subject to license terms. | |
46 | ||
47 | headerless | |
48 | ||
49 | \ Fill in the IP header checksum and send the packet. | |
50 | : (ip-output) ( ippkt nexthop -- #sent ) | |
51 | swap 0 over >ip-cksum htonw! ( nexthop ippkt ) | |
52 | dup ip-checksum over >ip-cksum htonw! ( nexthop ippkt ) | |
53 | tuck swap arp-resolve if ( ippkt hwaddr ) | |
54 | over ip-len@ swap IP_TYPE if-output ( #sent ) | |
55 | else ( ippkt ) | |
56 | drop 0 ( 0 ) | |
57 | then ( #sent ) | |
58 | ; | |
59 | ||
60 | : ipf-copydata ( dgram fragoff fraglen fragpkt -- ) | |
61 | /ip-header ca+ swap >r >r /ip-header + ca+ r> r> move | |
62 | ; | |
63 | ||
64 | \ Construct a fragment. | |
65 | : ip-make-fragment ( dgram fragoff fraglen -- fragpkt ) | |
66 | pkt-alloc ?dup 0= if ( dgram offset len ) | |
67 | 3drop 0 exit ( 0 ) | |
68 | then ( dgram offset len pkt ) | |
69 | 3 pick over /ip-header move ( dgram offset len pkt ) | |
70 | over /ip-header + over ip-len! ( dgram offset len pkt ) | |
71 | 2over 2over ipf-copydata ( dgram offset len pkt ) | |
72 | >r ( dgram offset len ) ( r: pkt ) | |
73 | over + rot ip-datalen@ <> if ( offset ) | |
74 | IP_MF ( offset ipf-flags ) | |
75 | else ( offset ) | |
76 | 0 ( offset ipf-flags ) | |
77 | then ( offset ipf-flags ) | |
78 | swap 3 rshift or r@ >ip-fraginfo htonw! ( ) | |
79 | r> ( pkt ) ( r: ) | |
80 | ; | |
81 | ||
82 | \ Create and send a single fragment. | |
83 | : ipf-send ( dgram fragoff fraglen nexthop -- #sent ) | |
84 | >r ip-make-fragment r> over if (ip-output) else 2drop 0 then | |
85 | ; | |
86 | ||
87 | \ Transmit datagram, fragmenting it if necessary. | |
88 | : ip-send-datagram ( dgram nexthop -- #sent ) | |
89 | over ip-len@ if-mtu@ <= if ( dgram nexthop ) | |
90 | (ip-output) ( #sent ) | |
91 | else ( dgram nexthop ) | |
92 | >r ( dgram ) ( r: nexthop ) | |
93 | 0 begin ( dgram nsent ) | |
94 | over ip-datalen@ over - ( dgram nsent rem ) | |
95 | ?dup while ( dgram nsent rem ) | |
96 | dup /ip-header + if-mtu@ > if ( dgram nsent rem ) | |
97 | drop if-mtu@ /ip-header - h# fff8 and ( dgram nsent fragsize ) | |
98 | then ( dgram nsent fragsize ) | |
99 | 3dup r@ ipf-send 0= if ( dgram nsent fragsize ) | |
100 | r> 3drop pkt-free 0 exit ( 0 ) ( r: ) | |
101 | then ( dgram nsent fragsize ) | |
102 | + ( dgram nsent' ) | |
103 | repeat ( dgram nsent' ) | |
104 | /ip-header + ( dgram #sent ) | |
105 | swap pkt-free ( #sent ) | |
106 | r> drop ( #sent ) ( r: ) | |
107 | then ( #sent ) | |
108 | ; | |
109 | ||
110 | instance variable ip-sequence | |
111 | ||
112 | \ Determine next hop, complete the IP header and send the datagram. Most | |
113 | \ of the fields in the IP header are initialized by the transport layer | |
114 | \ protocol. Only the IP version, header length, datagram identifier and | |
115 | \ the checksum are filled in here. | |
116 | ||
117 | : ip-output ( ippkt -- #sent | error# ) | |
118 | dup >ip-dest ipdest>nexthop ?dup 0= if ( pkt ) | |
119 | pkt-free EHOSTUNREACH exit ( error# ) | |
120 | then swap ( nexthop pkt ) | |
121 | ||
122 | h# 45 over >ip-ver,hlen c! | |
123 | ip-sequence @ over >ip-id htonw! 1 ip-sequence +! | |
124 | 0 over >ip-fraginfo htonw! | |
125 | ||
126 | swap ip-send-datagram ( #sent ) | |
127 | ; | |
128 | ||
129 | headers |