1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 2001 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <stdio.h>
30 #include <sys/types.h>
31 
32 #include <at.h>
33 #include <snoop.h>
34 
35 static void show_rtmp_tuples(uint8_t *, int);
36 
37 static char *
rtmp_func_long(uint8_t fun)38 rtmp_func_long(uint8_t fun)
39 {
40 	switch (fun) {
41 	case RTMP_REQ:
42 		return ("Request");
43 	case RTMP_RDR_SH:
44 		return ("Route Data Request, split horizon");
45 	case RTMP_RDR_NSH:
46 		return ("Route Data Request, no split horizon");
47 	default:
48 		return ("unknown");
49 	}
50 }
51 
52 static char *
rtmp_func_short(uint8_t fun)53 rtmp_func_short(uint8_t fun)
54 {
55 	switch (fun) {
56 	case RTMP_REQ:
57 		return ("Req");
58 	case RTMP_RDR_SH:
59 		return ("RDR, sh");
60 	case RTMP_RDR_NSH:
61 		return ("RDR, no sh");
62 	default:
63 		return ("unknown");
64 	}
65 }
66 
67 void
interpret_rtmp(int flags,struct ddp_hdr * ddp,int len)68 interpret_rtmp(int flags, struct ddp_hdr *ddp, int len)
69 {
70 	uint8_t *data;
71 	uint16_t snet;
72 	uint8_t node;
73 	int tuples;
74 	int runt;
75 	char extended;
76 
77 	len -= DDPHDR_SIZE;
78 	if (len < 0)
79 		goto out;
80 
81 	data = (uint8_t *)ddp + DDPHDR_SIZE;
82 
83 	switch (ddp->ddp_type) {
84 	case DDP_TYPE_RTMPRQ:		/* simple rtmp */
85 		if (len < 1)
86 			goto out;
87 
88 		if (flags & F_SUM) {
89 			(void) snprintf(get_sum_line(), MAXLINE,
90 			    "RTMP F=%s",
91 			    rtmp_func_short(data[0]));
92 		}
93 
94 		if (flags & F_DTAIL) {
95 			show_header("RTMP: ", "RTMP Header", len);
96 			show_space();
97 
98 			(void) snprintf(get_line(0, 0), get_line_remain(),
99 			    "Func = %d (%s)",
100 			    data[0], rtmp_func_long(data[0]));
101 		}
102 		break;
103 	case DDP_TYPE_RTMPRESP:		/* RTMP data */
104 		if (len < 3)
105 			goto out;
106 
107 		snet = get_short(data);
108 		if (data[2] != 8)	/* ID length is always 8 */
109 			return;
110 		node = data[3];		/* assume id_len == 8 */
111 		extended = (data[6] != RTMP_FILLER) &&
112 		    (get_short(&data[4]) != 0);
113 
114 		tuples = (len - 4) / 3;
115 		runt = (len - 4) % 3; /* integral length? */
116 
117 		if (flags & F_SUM) {
118 			(void) snprintf(get_sum_line(), MAXLINE,
119 			    "RTMP Data Snet=%d, Snode=%d%s",
120 			    snet, node, runt != 0 ? " (short)" : "");
121 		}
122 
123 		if (flags & F_DTAIL) {
124 			show_header("RTMP: ", "RTMP Header", len);
125 			show_space();
126 
127 			(void) snprintf(get_line(0, 0), get_line_remain(),
128 			    "RTMP Data, Length = %d%s",
129 			    len, runt != 0 ? " (short packet)" : "");
130 			(void) snprintf(get_line(0, 0), get_line_remain(),
131 			    "Senders Net = %d, Sender Node %d",
132 			    snet, node);
133 			if (extended)
134 				show_rtmp_tuples(&data[4], tuples);
135 			else
136 				show_rtmp_tuples(&data[7], tuples-1);
137 		}
138 
139 		break;
140 	}
141 	return;
142 out:
143 	if (flags & F_SUM) {
144 		(void) snprintf(get_sum_line(), MAXLINE,
145 		    "RTMP (short packet)");
146 	}
147 
148 	if (flags & F_DTAIL) {
149 		show_header("RTMP: ", "RTMP Header", len);
150 		show_space();
151 
152 		(void) snprintf(get_line(0, 0), get_line_remain(),
153 		    "(short packet)");
154 	}
155 }
156 
157 static void
show_rtmp_tuples(uint8_t * p,int tuples)158 show_rtmp_tuples(uint8_t *p, int tuples)
159 {
160 	while (tuples > 0) {
161 
162 		if (p[2] & RTMP_EXTEND) { /* extended tuple? */
163 
164 			(void) snprintf(get_line(0, 0),
165 			    get_line_remain(),
166 			    "Network = %d-%d, Distance = %d",
167 			    get_short(p), get_short(&p[3]),
168 			    p[2] & RTMP_DIST_MASK);
169 			p += 6;
170 			tuples -= 2;
171 		} else {
172 
173 			(void) snprintf(get_line(0, 0),
174 			    get_line_remain(),
175 			    "Network = %d, Distance = %d",
176 			    get_short(p), p[2]);
177 			p += 3;
178 			tuples--;
179 		}
180 	}
181 }
182