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annotate ater/dbits.c @ 45:349fb785a414

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ater: add dset command for setting Dn bits
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 12 Sep 2024 09:33:55 +0000
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children 40f781efdbe1
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45
349fb785a414 ater: add dset command for setting Dn bits
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * Here we implement the command for setting Dn bit patterns
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3 * in data-mode TRAU-UL frames.
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4 */
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5
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6 #include <stdint.h>
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7 #include <stdbool.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11
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12 #include <osmocom/core/bits.h>
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13 #include <osmocom/core/select.h>
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14 #include <osmocom/isdn/i460_mux.h>
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15 #include <osmocom/trau/trau_frame.h>
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16
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17 #include "globals.h"
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18 #include "submux.h"
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19
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20 void cmd_set_dbits(int argc, char **argv)
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21 {
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22 int nr;
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23 struct ater_subslot *at;
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24 struct osmo_trau_frame *fr;
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25 unsigned d_offset;
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26 char *bits;
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27
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28 if (argc != 4) {
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29 usage: fprintf(stderr, "usage: %s 0|1|2|3 D-offset bits\n", argv[0]);
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30 return;
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31 }
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32 if (argv[1][0] < '0' || argv[1][0] > '3' || argv[1][1])
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33 goto usage;
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34 nr = argv[1][0] - '0';
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35 at = &subslots[nr];
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36 if (!at->is_active) {
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37 fprintf(stderr, "error: subslot %d is not active\n", nr);
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38 return;
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39 }
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40 if (!at->is_data) {
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41 fprintf(stderr, "error: subslot %d is not in data mode\n", nr);
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42 return;
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43 }
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44 fr = &at->ul_frame;
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45 d_offset = atoi(argv[2]);
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46 if (d_offset >= 252) {
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47 fprintf(stderr, "error: specified offset is out of range\n");
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48 return;
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49 }
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50 for (bits = argv[3]; *bits; bits++) {
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51 if (*bits < '0' || *bits > '1') {
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52 fprintf(stderr, "error: invalid bit string argument\n");
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53 return;
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54 }
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55 if (d_offset >= 252) {
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56 fprintf(stderr,
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57 "error: given bit string extends past the end of Dn bits\n");
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58 return;
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59 }
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60 fr->d_bits[d_offset++] = *bits - '0';
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61 }
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62 }