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6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
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10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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22 /* \summary: ZigBee Encapsulation Protocol (ZEP) printer */
28 #include "netdissect-stdinc.h"
30 #define ND_LONGJMP_FROM_TCHECK
31 #include "netdissect.h"
35 /* From wireshark packet-zep.c:
37 ***********************************************************************
39 * ZEP Packets must be received in the following format:
41 * |UDP Header| ZEP Header |IEEE 802.15.4 Packet|
42 * | 8 bytes | 16/32 bytes | <= 127 bytes |
44 ***********************************************************************
46 * ZEP v1 Header will have the following format:
47 * |Preamble|Version|Channel ID|Device ID|CRC/LQI Mode|LQI Val|Reserved|Length|
48 * |2 bytes |1 byte | 1 byte | 2 bytes | 1 byte |1 byte |7 bytes |1 byte|
50 * ZEP v2 Header will have the following format (if type=1/Data):
51 * |Prmbl|Ver |Type |ChnlID|DevID|C/L Mode|LQI|NTP TS|Seq#|Res |Len|
52 * | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 8 | 4 | 10 | 1 |
54 * ZEP v2 Header will have the following format (if type=2/Ack):
55 * |Preamble|Version| Type |Sequence#|
56 * |2 bytes |1 byte |1 byte| 4 bytes |
57 *------------------------------------------------------------
60 #define JAN_1970 2208988800U
63 static void zep_print_ts(netdissect_options *ndo, const u_char *p)
71 uf = GET_BE_U_4(p + 4);
73 if (ff < 0.0) /* some compilers are buggy */
75 ff = (float) (ff / FMAXINT); /* shift radix point by 32 bits */
76 f = (uint32_t) (ff * 1000000000.0); /* treat fraction as parts per
78 ND_PRINT("%u.%09d", i, f);
82 * print the time in human-readable format.
85 time_t seconds = i - JAN_1970;
89 tm = localtime(&seconds);
90 strftime(time_buf, sizeof (time_buf), "%Y/%m/%d %H:%M:%S", tm);
91 ND_PRINT(" (%s)", time_buf);
97 * Main function to print packets.
101 zep_print(netdissect_options *ndo,
102 const u_char *bp, u_int len)
104 uint8_t version, inner_len;
107 ndo->ndo_protocol = "zep";
109 nd_print_protocol_caps(ndo);
111 /* Preamble Code (must be "EX") */
112 if (GET_U_1(bp) != 'E' || GET_U_1(bp + 1) != 'X') {
113 ND_PRINT(" [Preamble Code: ");
114 fn_print_char(ndo, GET_U_1(bp));
115 fn_print_char(ndo, GET_U_1(bp + 1));
117 nd_print_invalid(ndo);
121 version = GET_U_1(bp + 2);
122 ND_PRINT("v%u ", version);
126 ND_PRINT("Channel ID %u, Device ID 0x%04x, ",
127 GET_U_1(bp + 3), GET_BE_U_2(bp + 4));
131 ND_PRINT("LQI %u, ", GET_U_1(bp + 7));
132 inner_len = GET_U_1(bp + 15);
133 ND_PRINT("inner len = %u", inner_len);
139 if (GET_U_1(bp + 3) == 2) {
141 seq_no = GET_BE_U_4(bp + 4);
142 ND_PRINT("ACK, seq# = %u", seq_no);
147 /* ZEP v2 data, or some other. */
148 ND_PRINT("Type %u, Channel ID %u, Device ID 0x%04x, ",
149 GET_U_1(bp + 3), GET_U_1(bp + 4),
154 ND_PRINT("LQI %u, ", GET_U_1(bp + 8));
156 zep_print_ts(ndo, bp + 9);
157 seq_no = GET_BE_U_4(bp + 17);
158 inner_len = GET_U_1(bp + 31);
159 ND_PRINT(", seq# = %u, inner len = %u",
166 if (inner_len != 0) {
167 /* Call 802.15.4 dissector. */
169 if (ieee802_15_4_print(ndo, bp, inner_len)) {
170 ND_TCHECK_LEN(bp, len);
176 if (!ndo->ndo_suppress_default_print)
177 ND_DEFAULTPRINT(bp, len);