dahdi-tools/xpp/parse_span_specs.c

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/*
* Written by Oron Peled <oron@actcom.co.il>
* Copyright (C) 2014, Xorcom
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <regex.h>
#include <fnmatch.h>
#include <sys/time.h>
#include "parse_span_specs.h"
void free_span_specifications(struct span_specs *span_specs)
{
if (span_specs) {
if (span_specs->buf)
free(span_specs->buf);
free(span_specs);
}
}
static enum tdm_codec is_alaw_span_type(const char *span_type)
{
assert(span_type);
if (strcmp(span_type, "E1") == 0)
return TDM_CODEC_ALAW;
else if (strcmp(span_type, "T1") == 0)
return TDM_CODEC_ULAW;
return TDM_CODEC_UNKNOWN;
}
struct span_specs *parse_span_specifications(const char *spec_string, int default_is_alaw)
{
struct span_specs *span_specs;
char *p;
int spanno;
int i;
if (!spec_string)
return NULL;
/* Allocate and Initialize */
span_specs = calloc(sizeof(char *), MAX_SPANNO);
if (!span_specs)
goto err;
for (spanno = 0; spanno < MAX_SPANNO; spanno++)
span_specs->span_is_alaw[spanno] = TDM_CODEC_UNKNOWN;
span_specs->buf = strdup(spec_string);
if (!span_specs->buf)
goto err;
for (i = 0;; i++) {
char *curr_item;
char *tokenize_key;
char *key;
char *value;
enum tdm_codec is_alaw;
int matched;
/* Split to items */
p = (i == 0) ? span_specs->buf : NULL;
p = strtok_r(p, " \t,", &curr_item);
if (!p)
break;
/* Split to <span>:<type> */
key = strtok_r(p, ":", &tokenize_key);
if (!key) {
fprintf(stderr,
"Missing ':' (item #%d inside '%s')\n",
i+1, spec_string);
goto err;
}
value = strtok_r(NULL, ":", &tokenize_key);
if (!value) {
fprintf(stderr,
"Missing value after ':' (item #%d inside '%s')\n",
i+1, spec_string);
goto err;
}
/* Match span specification and set alaw/ulaw */
is_alaw = is_alaw_span_type(value);
if (is_alaw == TDM_CODEC_UNKNOWN) {
fprintf(stderr,
"Illegal span type '%s' (item #%d inside '%s')\n",
value, i+1, spec_string);
goto err;
}
matched = 0;
for (spanno = 0; spanno < MAX_SPANNO; spanno++) {
char tmpbuf[BUFSIZ];
snprintf(tmpbuf, sizeof(tmpbuf), "%d", spanno + 1);
if (fnmatch(p, tmpbuf, 0) == 0) {
matched++;
span_specs->span_is_alaw[spanno] = is_alaw;
}
}
if (!matched) {
fprintf(stderr,
"Span specification '%s' does not match any span (item #%d inside '%s')\n",
key, i+1, spec_string);
goto err;
}
}
/* Set defaults */
for (spanno = 0; spanno < MAX_SPANNO; spanno++) {
if (span_specs->span_is_alaw[spanno] == TDM_CODEC_UNKNOWN) {
span_specs->span_is_alaw[spanno] = default_is_alaw;
}
}
return span_specs;
err:
free_span_specifications(span_specs);
return NULL;
}
void print_span_specifications(struct span_specs *span_specs, FILE *output)
{
int spanno;
if (!span_specs)
return;
for (spanno = 0; spanno < MAX_SPANNO; spanno++) {
enum tdm_codec is_alaw;
is_alaw = span_specs->span_is_alaw[spanno];
fprintf(output, "%d %s\n",
spanno+1, (is_alaw == TDM_CODEC_ALAW) ? "alaw" : "ulaw");
}
}