forked from jbagg/QtZeroConf
183 lines
3.6 KiB
C
183 lines
3.6 KiB
C
/***
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This file is part of avahi.
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avahi is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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avahi is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with avahi; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <assert.h>
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#include "alternative.h"
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#include "malloc.h"
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#include "domain.h"
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#include "utf8.h"
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static void drop_incomplete_utf8(char *c) {
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char *e;
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e = strchr(c, 0) - 1;
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while (e >= c) {
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if (avahi_utf8_valid(c))
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break;
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assert(*e & 128);
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*e = 0;
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e--;
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}
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}
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char *avahi_alternative_host_name(const char *s) {
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const char *e;
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char *r;
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assert(s);
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if (!avahi_is_valid_host_name(s))
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return NULL;
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if ((e = strrchr(s, '-'))) {
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const char *p;
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e++;
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for (p = e; *p; p++)
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if (!isdigit(*p)) {
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e = NULL;
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break;
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}
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if (e && (*e == '0' || *e == 0))
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e = NULL;
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}
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if (e) {
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char *c, *m;
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size_t l;
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int n;
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n = atoi(e)+1;
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if (!(m = avahi_strdup_printf("%i", n)))
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return NULL;
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l = e-s-1;
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if (l >= AVAHI_LABEL_MAX-1-strlen(m)-1)
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l = AVAHI_LABEL_MAX-1-strlen(m)-1;
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if (!(c = avahi_strndup(s, l))) {
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avahi_free(m);
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return NULL;
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}
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drop_incomplete_utf8(c);
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r = avahi_strdup_printf("%s-%s", c, m);
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avahi_free(c);
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avahi_free(m);
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} else {
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char *c;
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if (!(c = avahi_strndup(s, AVAHI_LABEL_MAX-1-2)))
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return NULL;
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drop_incomplete_utf8(c);
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r = avahi_strdup_printf("%s-2", c);
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avahi_free(c);
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}
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assert(avahi_is_valid_host_name(r));
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return r;
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}
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char *avahi_alternative_service_name(const char *s) {
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const char *e;
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char *r;
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assert(s);
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if (!avahi_is_valid_service_name(s))
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return NULL;
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if ((e = strstr(s, " #"))) {
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const char *n, *p;
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e += 2;
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while ((n = strstr(e, " #")))
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e = n + 2;
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for (p = e; *p; p++)
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if (!isdigit(*p)) {
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e = NULL;
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break;
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}
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if (e && (*e == '0' || *e == 0))
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e = NULL;
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}
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if (e) {
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char *c, *m;
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size_t l;
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int n;
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n = atoi(e)+1;
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if (!(m = avahi_strdup_printf("%i", n)))
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return NULL;
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l = e-s-2;
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if (l >= AVAHI_LABEL_MAX-1-strlen(m)-2)
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l = AVAHI_LABEL_MAX-1-strlen(m)-2;
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if (!(c = avahi_strndup(s, l))) {
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avahi_free(m);
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return NULL;
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}
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drop_incomplete_utf8(c);
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r = avahi_strdup_printf("%s #%s", c, m);
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avahi_free(c);
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avahi_free(m);
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} else {
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char *c;
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if (!(c = avahi_strndup(s, AVAHI_LABEL_MAX-1-3)))
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return NULL;
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drop_incomplete_utf8(c);
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r = avahi_strdup_printf("%s #2", c);
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avahi_free(c);
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}
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assert(avahi_is_valid_service_name(r));
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return r;
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}
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