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annotate simtool/sysmo.c @ 1:2071b28cd0c7

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simtool: first refactored version
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 11 Feb 2021 23:04:28 +0000
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children c0cd0d4635bb
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2071b28cd0c7 simtool: first refactored version
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1 /*
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2 * This module implements special commands for programmable and
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3 * semi-programmable (made-up term for the version without ADM keys)
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4 * SIM cards made by Sysmocom.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include "simresp.h"
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13 #include "curfile.h"
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14 #include "file_id.h"
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15
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16 cmd_fix_sysmo_msisdn()
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17 {
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18 int rc;
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19 unsigned n;
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20 u_char newrec[34];
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21
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22 rc = select_op(DF_TELECOM);
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23 if (rc < 0)
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24 return(rc);
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25 rc = select_op(EF_MSISDN);
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26 if (rc < 0)
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27 return(rc);
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28 rc = parse_ef_select_response();
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29 if (rc < 0)
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30 return(rc);
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31 if (curfile_structure != 0x01) {
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32 fprintf(stderr, "error: EF_MSISDN is not linear fixed\n");
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33 return(-1);
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34 }
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35 if (curfile_record_len != 34) {
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36 fprintf(stderr,
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37 "error: expected EF_MSISDN record length of 34 bytes, got %u\n",
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38 curfile_record_len);
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39 return(-1);
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40 }
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41 rc = readrec_op(1, 0x04, 34);
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42 if (rc < 0)
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43 return(rc);
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44 for (n = 0; n < 18; n++) {
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45 if (sim_resp_data[n] != 0xFF) {
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46 fprintf(stderr,
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47 "error: non-FF data in the first 18 bytes of alpha tag area\n");
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48 return(-1);
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49 }
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50 }
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51 if (sim_resp_data[18] == 0xFF && sim_resp_data[19] == 0xFF) {
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52 printf(
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53 "last 2 bytes of alpha tag area are clear - already fixed?\n");
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54 return(0);
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55 }
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56 if (sim_resp_data[18] != 0x07 || sim_resp_data[19] != 0x91) {
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57 fprintf(stderr,
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58 "error: bytes 18 & 19 don't match expected bogus programming\n");
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59 return(-1);
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60 }
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61 memset(newrec, 0xFF, 34);
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62 memcpy(newrec + 20, sim_resp_data + 18, 8);
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63 return update_rec_op(1, 0x04, newrec, 34);
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64 }