FreeCalypso > hg > e1-fake-trau

annotate libutil/open_ts.c @ 6:3ab5e2e17da2 default tip

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add README
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 29 Aug 2024 14:56:30 +0000
parents e5527fc2050b
children
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1
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1 /*
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2 * The function in this common module is responsible for parsing the
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3 * user-supplied E1 timeslot specification and then opening that ts
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4 * in osmo-e1d.
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5 *
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6 * This code is based on osmo-e1d-pipe,
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7 * (C) 2020-2022 by Harald Welte <laforge@osmocom.org>,
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8 * SPDX-License-Identifier: GPL-2.0+
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9 */
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10
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11 #include <ctype.h>
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12 #include <stdint.h>
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13 #include <stdbool.h>
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16
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17 #include <osmocom/e1d/proto_clnt.h>
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18
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19 #include "open_ts.h"
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20
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21 static int parse_component(const char *str, const char **outp, uint8_t *var)
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22 {
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23 if (!isdigit(*str))
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24 return -1;
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25 *var = atoi(str);
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26 while (isdigit(*str))
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27 str++;
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28 *outp = str;
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29 return 0;
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30 }
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31
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32 int open_e1d_ts(struct osmo_e1dp_client *e1_client, const char *ts_spec)
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33 {
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34 uint8_t intf_nr, line_nr, ts_nr;
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35 const char *cp;
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36 int fd;
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37
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38 if (parse_component(ts_spec, &cp, &intf_nr) < 0) {
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39 inv_syntax: fprintf(stderr, "error: invalid timeslot spec \"%s\"\n",
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40 ts_spec);
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41 exit(1);
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42 }
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43 if (*cp++ != ':')
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44 goto inv_syntax;
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45 if (parse_component(cp, &cp, &line_nr) < 0)
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46 goto inv_syntax;
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47 if (*cp++ != ':')
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48 goto inv_syntax;
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49 if (parse_component(cp, &cp, &ts_nr) < 0)
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50 goto inv_syntax;
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51 if (*cp)
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52 goto inv_syntax;
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53 fd = osmo_e1dp_client_ts_open(e1_client, intf_nr, line_nr, ts_nr,
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54 E1DP_TSMODE_RAW, 160);
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55 if (fd < 0) {
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56 fprintf(stderr, "error: failed to open E1 ts %s\n", ts_spec);
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57 exit(1);
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58 }
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59 return fd;
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60 }