Annotation of embedaddon/pimdd/rsrr.h, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1993, 1998 by the University of Southern California
3: * All rights reserved.
4: *
5: * Permission to use, copy, modify, and distribute this software and its
6: * documentation in source and binary forms for lawful purposes
7: * and without fee is hereby granted, provided that the above copyright
8: * notice appear in all copies and that both the copyright notice and
9: * this permission notice appear in supporting documentation. and that
10: * any documentation, advertising materials, and other materials related
11: * to such distribution and use acknowledge that the software was
12: * developed by the University of Southern California, Information
13: * Sciences Institute. The name of the University may not be used to
14: * endorse or promote products derived from this software without
15: * specific prior written permission.
16: *
17: * THE UNIVERSITY OF SOUTHERN CALIFORNIA makes no representations about
18: * the suitability of this software for any purpose. THIS SOFTWARE IS
19: * PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
20: * INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22: *
23: * Other copyrights might apply to parts of this software and are so
24: * noted when applicable.
25: */
26:
27: #define RSRR_SERV_PATH "/tmp/.rsrr_svr"
28: /* Note this needs to be 14 chars for 4.3 BSD compatibility */
29: #define RSRR_CLI_PATH "/tmp/.rsrr_cli"
30:
31: #define RSRR_MAX_LEN 2048
32: #define RSRR_HEADER_LEN (sizeof(struct rsrr_header))
33: #define RSRR_RQ_LEN (RSRR_HEADER_LEN + sizeof(struct rsrr_rq))
34: #define RSRR_RR_LEN (RSRR_HEADER_LEN + sizeof(struct rsrr_rr))
35: #define RSRR_VIF_LEN (sizeof(struct rsrr_vif))
36:
37: /* Current maximum number of vifs. */
38: #define RSRR_MAX_VIFS 32
39:
40: /* Maximum acceptable version */
41: #define RSRR_MAX_VERSION 1
42:
43: /* RSRR message types */
44: #define RSRR_ALL_TYPES 0
45: #define RSRR_INITIAL_QUERY 1
46: #define RSRR_INITIAL_REPLY 2
47: #define RSRR_ROUTE_QUERY 3
48: #define RSRR_ROUTE_REPLY 4
49:
50:
51: /* Each definition represents the position of the bit from right to left. */
52: /* All not defined bits are zeroes */
53:
54: /* RSRR Initial Reply (Vif) Status bits
55: *
56: * 0 = disabled bit, set if the vif is administratively disabled.
57: */
58: #define RSRR_DISABLED_BIT 0
59:
60: /* RSRR Route Query/Reply flag bits
61: *
62: * 0 = Route Change Notification bit, set if the reservation protocol
63: * wishes to receive notification of a route change for the
64: * source-destination pair listed in the query. Notification is in the
65: * form of an unsolicitied Route Reply.
66: * 1 = Error bit, set if routing doesn't have a routing entry for
67: * the source-destination pair.
68: * (TODO: XXX: currently not used by rsvpd?)
69: * (2,3) = Shared tree (Reply only)
70: * = 01 if the listed sender is using a shared tree, but some other
71: * senders for the same destination use sender (source-specific)
72: * trees.
73: * = 10 if all senders for the destination use shared tree.
74: * = 00 otherwise
75: */
76: #define RSRR_NOTIFICATION_BIT 0
77: #define RSRR_ERROR_BIT 1
78: #define RSRR_THIS_SENDER_SHARED_TREE 2
79: #define RSRR_ALL_SENDERS_SHARED_TREE 3
80: #define RSRR_SET_ALL_SENDERS_SHARED_TREE(X) \
81: BIT_SET((X), RSRR_ALL_SENDERS_SHARED_TREE); \
82: BIT_CLR((X), RSRR_THIS_SENDER_SHARED_TREE);
83: #define RSRR_THIS_SENDER_SHARED_TREE_SOME_OTHER_NOT(X) \
84: BIT_SET((X), RSRR_THIS_SENDER_SHARED_TREE); \
85: BIT_CLR((X), RSRR_ALL_SENDERS_SHARED_TREE)
86:
87: /* Definition of an RSRR message header.
88: * An Initial Query uses only the header, and an Initial Reply uses
89: * the header and a list of vifs.
90: */
91: struct rsrr_header {
92: u_int8 version; /* RSRR Version, currently 1 */
93: u_int8 type; /* type of message, as defined above*/
94: u_int8 flags; /* flags; defined by type */
95: u_int8 num; /* number; defined by type */
96: };
97:
98: /* Definition of a vif as seen by the reservation protocol.
99: *
100: * Routing gives the reservation protocol a list of vifs in the
101: * Initial Reply.
102: *
103: * We explicitly list the ID because we can't assume that all routing
104: * protocols will use the same numbering scheme.
105: *
106: * The status is a bitmask of status flags, as defined above. It is the
107: * responsibility of the reservation protocol to perform any status checks
108: * if it uses the MULTICAST_VIF socket option.
109: *
110: * The threshold indicates the ttl an outgoing packet needs in order to
111: * be forwarded. The reservation protocol must perform this check itself if
112: * it uses the MULTICAST_VIF socket option.
113: *
114: * The local address is the address of the physical interface over which
115: * packets are sent.
116: */
117: struct rsrr_vif {
118: u_int8 id; /* vif id */
119: u_int8 threshold; /* vif threshold ttl */
120: u_int16 status; /* vif status bitmask */
121: u_int32 local_addr; /* vif local address */
122: };
123:
124: /* Definition of an RSRR Route Query.
125: *
126: * The query asks routing for the forwarding entry for a particular
127: * source and destination. The query ID uniquely identifies the query
128: * for the reservation protocol. Thus, the combination of the client's
129: * address and the query ID forms a unique identifier for routing.
130: * Flags are defined above.
131: */
132: struct rsrr_rq {
133: u_int32 dest_addr; /* destination */
134: u_int32 source_addr; /* source */
135: u_int32 query_id; /* query ID */
136: };
137:
138: /* Definition of an RSRR Route Reply.
139: *
140: * Routing uses the reply to give the reservation protocol the
141: * forwarding entry for a source-destination pair. Routing copies the
142: * query ID from the query and fills in the incoming vif and a bitmask
143: * of the outgoing vifs.
144: * Flags are defined above.
145: */
146: /* TODO: XXX: in_vif is 16 bits here, but in rsrr_vif it is 8 bits.
147: * Bug in the spec?
148: */
149: struct rsrr_rr {
150: u_int32 dest_addr; /* destination */
151: u_int32 source_addr; /* source */
152: u_int32 query_id; /* query ID */
153: u_int16 in_vif; /* incoming vif */
154: u_int16 reserved; /* reserved */
155: u_int32 out_vif_bm; /* outgoing vif bitmask */
156: };
157:
158:
159: /* TODO: XXX: THIS IS NOT IN THE SPEC! (OBSOLETE?) */
160: #ifdef NOT_IN_THE_SPEC
161: /* Definition of an RSRR Service Query/Reply.
162: *
163: * The query asks routing to perform a service for a particular
164: * source/destination combination. The query also lists the vif
165: * that the service applies to.
166: */
167: struct rsrr_sqr {
168: u_int32 dest_addr; /* destination */
169: u_int32 source_addr; /* source */
170: u_int32 query_id; /* query ID */
171: u_int16 vif; /* vif */
172: u_int16 reserved; /* reserved */
173: };
174: #endif /* NOT_IN_THE_SPEC */
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