FreeCalypso > hg > fc-sim-tools
view simtool/pnndump.c @ 47:b0cf75d0bb2d
doc/Serial-SIM-readers article written
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 21 Mar 2021 04:32:18 +0000 |
parents | ddd767f6e15b |
children |
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/* * This module implements the pnn-dump command, providing a * user-accessible way to identify MVNO SIMs. */ #include <sys/types.h> #include <stdio.h> #include "simresp.h" #include "curfile.h" #include "file_id.h" select_ef_pnn() { int rc; rc = select_op(DF_GSM); if (rc < 0) return(rc); rc = select_op(EF_PNN); if (rc < 0) return(rc); rc = parse_ef_select_response(); if (rc < 0) return(rc); if (curfile_structure != 0x01) { fprintf(stderr, "error: EF_PNN is not linear fixed\n"); return(-1); } if (curfile_record_len < 3) { fprintf(stderr, "error: EF_PNN record length is less than the spec minimum of 3 bytes\n"); return(-1); } return(0); } static void dump_record(recno, outf) unsigned recno; FILE *outf; { u_char *dp, *endp; char *name_kw; unsigned ielen, code_byte, nsept; u_char gsm7_buf[288]; fprintf(outf, "#%u:", recno); dp = sim_resp_data; endp = sim_resp_data + sim_resp_data_len; while (dp < endp) { if (*dp == 0xFF) break; switch (*dp++) { case 0x43: name_kw = "Ln"; break; case 0x45: name_kw = "Sn"; break; default: fprintf(outf, " unknown-IEI\n"); return; } if (dp >= endp) { fprintf(outf, " truncated-IE\n"); return; } ielen = *dp++; if (ielen < 1 || ielen > (endp - dp)) { fprintf(outf, " bad-length\n"); return; } code_byte = *dp++; ielen--; fprintf(outf, " %s=0x%02X", name_kw, code_byte); if (!ielen) continue; putc(',', outf); if ((code_byte & 0x70) == 0) { nsept = ielen * 8 / 7; gsm7_unpack(dp, gsm7_buf, nsept); dp += ielen; print_gsm7_string_to_file(gsm7_buf, nsept, outf); } else { for (; ielen; ielen--) fprintf(outf, "%02X", *dp++); } } for (; dp < endp; dp++) { if (*dp != 0xFF) { fprintf(outf, " bad-padding\n"); return; } } putc('\n', outf); } cmd_pnn_dump(argc, argv, outf) char **argv; FILE *outf; { int rc; unsigned recno; rc = select_ef_pnn(); if (rc < 0) return(rc); for (recno = 1; recno <= curfile_record_count; recno++) { rc = readrec_op(recno, 0x04, curfile_record_len); if (rc < 0) return(rc); if (check_simresp_all_blank()) continue; dump_record(recno, outf); } return(0); }