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annotate libcommon/dumpdirfunc.c @ 92:9c3155221b0e

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doc/Low-level-commands: readef command documented
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 17 Feb 2021 19:18:20 +0000
parents 2c72709e0891
children dcfec53643c5
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6
2c72709e0891 EF_DIR dump meaty function factored out into libcommon
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1 /*
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2 * This module implements the common function for dumping EF_DIR.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include "simresp.h"
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8
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9 static void
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10 dump_aid(tlv)
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11 u_char *tlv;
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12 {
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13 unsigned reclen, n;
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14
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15 reclen = tlv[1];
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16 printf(" AID:");
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17 for (n = 0; n < reclen; n++)
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18 printf(" %02X", tlv[n+2]);
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19 putchar('\n');
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20 }
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21
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22 static void
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23 dump_label(tlv)
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24 u_char *tlv;
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25 {
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26 int rc;
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27 unsigned textlen;
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28
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29 printf(" Label: ");
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30 rc = validate_alpha_field(tlv + 2, tlv[1], &textlen);
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31 if (rc < 0) {
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32 printf("malformed\n");
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33 return;
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34 }
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35 print_alpha_field(tlv + 2, textlen, stdout);
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36 putchar('\n');
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37 }
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38
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39 static void
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40 dump_unknown_tlv(tlv)
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41 u_char *tlv;
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42 {
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43 unsigned reclen, n;
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44
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45 reclen = tlv[1] + 2;
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46 printf(" TLV:");
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47 for (n = 0; n < reclen; n++)
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48 printf(" %02X", tlv[n]);
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49 putchar('\n');
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50 }
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51
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52 void
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53 dump_efdir_record()
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54 {
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55 unsigned totlen, reclen;
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56 u_char *dp, *endp;
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57
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58 if (sim_resp_data[0] != 0x61) {
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59 printf(" bad: first byte != 0x61\n");
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60 return;
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61 }
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62 totlen = sim_resp_data[1];
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63 if (totlen < 3 || totlen > 0x7F) {
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64 printf(" bad: global length byte 0x%02X is invalid\n", totlen);
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65 return;
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66 }
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67 if (totlen + 2 > sim_resp_data_len) {
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68 printf(" bad: TLV global length exceeds EF record length\n");
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69 return;
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70 }
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71 dp = sim_resp_data + 2;
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72 endp = sim_resp_data + 2 + totlen;
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73 while (dp < endp) {
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74 if (endp - dp < 2) {
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75 trunc_error: printf(" bad: truncated TLV record\n");
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76 return;
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77 }
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78 if ((dp[0] & 0x1F) == 0x1F) {
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79 printf(" bad: extended tag not supported\n");
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80 return;
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81 }
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82 if (dp[1] & 0x80) {
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83 printf(" bad: extended length not supported\n");
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84 return;
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85 }
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86 reclen = dp[1] + 2;
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87 if (endp - dp < reclen)
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88 goto trunc_error;
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89 switch (dp[0]) {
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90 case 0x4F:
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91 dump_aid(dp);
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92 break;
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93 case 0x50:
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94 dump_label(dp);
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95 break;
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96 default:
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97 dump_unknown_tlv(dp);
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98 }
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99 dp += reclen;
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100 }
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101 }