FreeCalypso > hg > ice1-trau-tester

annotate abis/main.c @ 36:e4a0b4a61649

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top Makefile: add pcm-br
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 28 Aug 2024 05:02:29 +0000
parents 94f11dc0d474
children
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1 /*
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2 * This C module is the main for itt-abis-16, a test program for collecting
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3 * TRAU-UL captures from an E1 BTS. This program operates on a single E1
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4 * timeslot on Abis and treats it as consisting of four 16 kbit/s subslots.
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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 <stdint.h>
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12 #include <stdbool.h>
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13 #include <stdio.h>
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14 #include <stdlib.h>
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15 #include <string.h>
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16 #include <unistd.h>
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17
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18 #include <osmocom/core/talloc.h>
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19 #include <osmocom/core/select.h>
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20 #include <osmocom/core/application.h>
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21 #include <osmocom/e1d/proto_clnt.h>
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22 #include <osmocom/isdn/i460_mux.h>
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23 #include <osmocom/trau/trau_sync.h>
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25 #include "../libutil/open_ts.h"
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26 #include "../libutil/stdin_handler.h"
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27 #include "globals.h"
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28 #include "submux.h"
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29 #include "dl_frames.h"
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31 void *g_ctx;
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32 struct osmo_e1dp_client *g_client;
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33 int ts_fd;
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34 struct osmo_i460_timeslot i460_ts;
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35 struct abis_subslot subslots[ABIS_SUBSLOTS];
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37 static const char *e1d_socket_path = E1DP_DEFAULT_SOCKET;
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38 static const char *timeslot_spec;
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39 static struct osmo_fd ts_ofd, stdin_ofd;
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41 static void process_cmdline(int argc, char **argv)
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42 {
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43 extern int optind;
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44 extern char *optarg;
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45 int c;
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46
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47 while ((c = getopt(argc, argv, "p:")) != EOF) {
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48 switch (c) {
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49 case 'p':
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50 e1d_socket_path = optarg;
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51 continue;
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52 default:
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53 usage:
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54 fprintf(stderr, "usage: %s [-p socket] intf:line:ts\n",
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55 argv[0]);
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56 exit(1);
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57 }
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58 }
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59 if (argc != optind + 1)
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60 goto usage;
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61 timeslot_spec = argv[optind];
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62 }
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63
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64 static void register_subslots(void)
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65 {
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66 int nr;
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67 struct osmo_i460_schan_desc chd;
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68
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69 memset(&chd, 0, sizeof chd);
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70 chd.rate = OSMO_I460_RATE_16k;
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71 chd.demux.num_bits = 320;
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72 chd.demux.out_cb_bits = i460_rx_func;
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73
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74 for (nr = 0; nr < ABIS_SUBSLOTS; nr++) {
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75 subslots[nr].nr = nr;
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76 chd.demux.user_data = subslots + nr;
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77 chd.mux.user_data = subslots + nr;
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78 subslots[nr].schan =
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79 osmo_i460_subchan_add(g_ctx, &i460_ts, &chd);
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80 OSMO_ASSERT(subslots[nr].schan);
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81 chd.bit_offset += 2;
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82 }
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83 }
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84
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85 static void setup_rx_sync(void)
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86 {
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87 int nr;
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88
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89 for (nr = 0; nr < ABIS_SUBSLOTS; nr++) {
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90 subslots[nr].sync = osmo_trau_sync_alloc(g_ctx, "TRAU-UL-sync",
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91 sync_rx_func, OSMO_TRAU_SYNCP_16_FR_EFR,
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92 subslots + nr);
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93 OSMO_ASSERT(subslots[nr].sync);
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94 }
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95 }
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96
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97 int main(int argc, char **argv)
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98 {
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99 process_cmdline(argc, argv);
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100 g_ctx = talloc_named_const(NULL, 0, "g_ctx");
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101 OSMO_ASSERT(g_ctx);
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102 osmo_init_logging2(g_ctx, NULL);
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103
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104 g_client = osmo_e1dp_client_create(g_ctx, e1d_socket_path);
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105 if (!g_client) {
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106 fprintf(stderr, "error: cannot connect to osmo-e1d at %s\n",
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107 e1d_socket_path);
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108 exit(1);
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109 }
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110 ts_fd = open_e1d_ts(g_client, timeslot_spec);
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111
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112 osmo_i460_ts_init(&i460_ts);
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113 register_subslots();
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114 setup_rx_sync();
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115 init_canned_dl_frames();
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116
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117 osmo_fd_setup(&ts_ofd, ts_fd, OSMO_FD_READ, ts_fd_cb, NULL, 0);
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118 OSMO_ASSERT(osmo_fd_register(&ts_ofd) == 0);
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119
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120 osmo_fd_setup(&stdin_ofd, 0, OSMO_FD_READ, stdin_select_cb,
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121 handle_user_cmd, 0);
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122 OSMO_ASSERT(osmo_fd_register(&stdin_ofd) == 0);
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123
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124 while (1) {
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125 osmo_select_main(0);
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126 }
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127 }