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annotate simtool/pnndump.c @ 222:8c151bb01d28

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doc/GrcardSIM2-WEKI-file: update for partial understanding and implementation
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 09 Mar 2021 03:13:41 +0000
parents 8b1eecb56cb5
children
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dc8a2e6fa03e fc-simtool pnn-dump implemented
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1 /*
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2 * This module implements the pnn-dump command, providing a
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3 * user-accessible way to identify MVNO SIMs.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include "simresp.h"
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9 #include "curfile.h"
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10 #include "file_id.h"
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11
214
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12 select_ef_pnn()
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13 {
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14 int rc;
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15
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16 rc = select_op(DF_GSM);
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17 if (rc < 0)
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18 return(rc);
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19 rc = select_op(EF_PNN);
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20 if (rc < 0)
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21 return(rc);
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22 rc = parse_ef_select_response();
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23 if (rc < 0)
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24 return(rc);
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25 if (curfile_structure != 0x01) {
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26 fprintf(stderr, "error: EF_PNN is not linear fixed\n");
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27 return(-1);
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28 }
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29 if (curfile_record_len < 3) {
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30 fprintf(stderr,
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31 "error: EF_PNN record length is less than the spec minimum of 3 bytes\n");
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32 return(-1);
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33 }
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34 return(0);
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35 }
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36
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37 static void
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38 dump_record(recno, outf)
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39 unsigned recno;
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40 FILE *outf;
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41 {
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42 u_char *dp, *endp;
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43 char *name_kw;
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44 unsigned ielen, code_byte, nsept;
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45 u_char gsm7_buf[288];
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46
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47 fprintf(outf, "#%u:", recno);
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48 dp = sim_resp_data;
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49 endp = sim_resp_data + sim_resp_data_len;
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50 while (dp < endp) {
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51 if (*dp == 0xFF)
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52 break;
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53 switch (*dp++) {
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54 case 0x43:
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55 name_kw = "Ln";
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56 break;
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57 case 0x45:
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58 name_kw = "Sn";
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59 break;
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60 default:
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61 fprintf(outf, " unknown-IEI\n");
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62 return;
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63 }
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64 if (dp >= endp) {
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65 fprintf(outf, " truncated-IE\n");
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66 return;
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67 }
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68 ielen = *dp++;
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69 if (ielen < 1 || ielen > (endp - dp)) {
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70 fprintf(outf, " bad-length\n");
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71 return;
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72 }
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73 code_byte = *dp++;
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74 ielen--;
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75 fprintf(outf, " %s=0x%02X", name_kw, code_byte);
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76 if (!ielen)
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77 continue;
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78 putc(',', outf);
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79 if ((code_byte & 0x70) == 0) {
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80 nsept = ielen * 8 / 7;
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81 gsm7_unpack(dp, gsm7_buf, nsept);
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82 dp += ielen;
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83 print_gsm7_string_to_file(gsm7_buf, nsept, outf);
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84 } else {
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85 for (; ielen; ielen--)
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86 fprintf(outf, "%02X", *dp++);
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87 }
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88 }
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89 for (; dp < endp; dp++) {
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90 if (*dp != 0xFF) {
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91 fprintf(outf, " bad-padding\n");
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92 return;
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93 }
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94 }
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95 putc('\n', outf);
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96 }
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97
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98 cmd_pnn_dump(argc, argv, outf)
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99 char **argv;
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100 FILE *outf;
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101 {
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102 int rc;
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103 unsigned recno;
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104
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105 rc = select_ef_pnn();
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106 if (rc < 0)
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107 return(rc);
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108 for (recno = 1; recno <= curfile_record_count; recno++) {
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109 rc = readrec_op(recno, 0x04, curfile_record_len);
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110 if (rc < 0)
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111 return(rc);
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112 if (check_simresp_all_blank())
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113 continue;
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114 dump_record(recno, outf);
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115 }
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116 return(0);
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117 }