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comparison tfo/tfo-trace-msg.c @ 30:19039ffbe605

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tfo-trace-msg: higher level of decoding for TFO_REQ
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 28 Aug 2024 03:03:46 +0000
parents fec87477e60b
children f6bb790e186a
comparison
equal deleted inserted replaced
29:fec87477e60b 30:19039ffbe605
7 #include <stdio.h> 7 #include <stdio.h>
8 #include <stdint.h> 8 #include <stdint.h>
9 #include <stdlib.h> 9 #include <stdlib.h>
10 #include <string.h> 10 #include <string.h>
11 #include <strings.h> 11 #include <strings.h>
12
13 #define MAX_EXT_WORDS 5
12 14
13 static uint8_t is_hunt_buf[320]; 15 static uint8_t is_hunt_buf[320];
14 static int is_state; 16 static int is_state;
15 static unsigned is_hunt_fill; 17 static unsigned is_hunt_fill;
16 static unsigned is_offset; 18 static unsigned is_offset;
17 static unsigned is_file_offset; 19 static unsigned is_file_offset;
18 static unsigned is_bit_count; 20 static unsigned is_bit_count;
19 static unsigned is_rx_word; 21 static uint32_t is_rx_word, is_cmd, is_ext_words[MAX_EXT_WORDS];
22 static unsigned is_ext_count;
20 23
21 static const u_char hdr_pattern[20] = {0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 24 static const u_char hdr_pattern[20] = {0, 1, 0, 1, 0, 1, 1, 0, 1, 0,
22 0, 1, 1, 0, 1, 0, 1, 0, 0, 1}; 25 0, 1, 1, 0, 1, 0, 1, 0, 0, 1};
23 26
24 static void 27 static void
48 is_process_cmd() 51 is_process_cmd()
49 { 52 {
50 int cont; 53 int cont;
51 54
52 printf("0x%x: ", is_file_offset); 55 printf("0x%x: ", is_file_offset);
53 switch (is_rx_word) { 56 is_cmd = is_rx_word;
57 switch (is_cmd) {
54 case 0x05D: 58 case 0x05D:
55 printf("IS_REQ\n"); 59 printf("IS_REQ\n");
56 cont = 1; 60 cont = 1;
57 break; 61 break;
58 case 0x0BA: 62 case 0x0BA:
74 case 0x193: 78 case 0x193:
75 printf("IS_SYL\n"); 79 printf("IS_SYL\n");
76 cont = 0; 80 cont = 0;
77 break; 81 break;
78 default: 82 default:
79 printf("unknown IS_Command 0x%03X\n", is_rx_word); 83 printf("unknown IS_Command 0x%03X\n", (unsigned) is_cmd);
80 cont = 0; 84 cont = 0;
81 } 85 }
82 if (cont) { 86 if (cont) {
83 is_state = 2; 87 is_state = 2;
84 is_bit_count = 0; 88 is_bit_count = 0;
85 is_rx_word = 0; 89 is_rx_word = 0;
90 is_ext_count = 0;
86 } else 91 } else
87 is_state = 0; 92 is_state = 0;
88 } 93 }
89 94
90 static void 95 static void
96 process_tfo_req_ack(reqack)
97 char *reqack;
98 {
99 if (is_ext_count != 2)
100 return;
101 if (is_ext_words[0] != 0x5394B) /* GSM System ID */
102 return;
103 printf(" TFO_%s: List_Ind=%u Sig=0x%02X CoID=0x%X CRC=%u\n", reqack,
104 (is_ext_words[1] >> 18) & 1, (is_ext_words[1] >> 10) & 0xFF,
105 (is_ext_words[1] >> 5) & 0xF, (is_ext_words[1] >> 2) & 7);
106 }
107
108 static void
109 is_process_high_level()
110 {
111 switch (is_cmd) {
112 case 0x05D:
113 process_tfo_req_ack("REQ");
114 break;
115 case 0x0BA:
116 process_tfo_req_ack("ACK");
117 break;
118 }
119 }
120
121 static void
91 is_process_ext() 122 is_process_ext()
92 { 123 {
93 printf(" IS_Extension: 0x%05X", is_rx_word); 124 printf(" IS_Extension: 0x%05X", (unsigned) is_rx_word);
94 if (is_rx_word & 0x80200) { 125 if (is_rx_word & 0x80200) {
95 printf(" (bad sync)\n"); 126 printf(" (bad sync)\n");
96 is_state = 0; 127 is_state = 0;
97 return; 128 return;
98 } 129 }
130 if (is_ext_count < MAX_EXT_WORDS)
131 is_ext_words[is_ext_count++] = is_rx_word;
99 switch (is_rx_word & 3) { 132 switch (is_rx_word & 3) {
100 case 0: 133 case 0:
101 printf(" (final)\n"); 134 printf(" (final)\n");
102 is_state = 0; 135 is_state = 0;
136 is_process_high_level();
103 return; 137 return;
104 case 3: 138 case 3:
105 printf(" (continue)\n"); 139 printf(" (continue)\n");
106 is_state = 2; 140 is_state = 2;
107 is_bit_count = 0; 141 is_bit_count = 0;