X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-common%2Falternative.c;h=b3d39f0ed90484d23c9fd8a41ce48ec83fefa1c2;hb=9c0f9c65093cfa53d45f9b68782321eb8063a032;hp=c9a0f48ac73a7c04fa245dbeceda6a73de35a6c2;hpb=c5544522f6409095627dc3d1129560195ab4ec40;p=catta

diff --git a/avahi-common/alternative.c b/avahi-common/alternative.c
index c9a0f48..b3d39f0 100644
--- a/avahi-common/alternative.c
+++ b/avahi-common/alternative.c
@@ -1,18 +1,16 @@
-/* $Id$ */
-
 /***
   This file is part of avahi.
- 
+
   avahi is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.
- 
+
   avahi 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 Lesser General
   Public License for more details.
- 
+
   You should have received a copy of the GNU Lesser General Public
   License along with avahi; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
@@ -26,41 +24,109 @@
 #include <string.h>
 #include <stdlib.h>
 #include <ctype.h>
+#include <assert.h>
 
 #include "alternative.h"
+#include "malloc.h"
+#include "domain.h"
+#include "utf8.h"
+
+static void drop_incomplete_utf8(char *c) {
+    char *e;
+
+    e = strchr(c, 0) - 1;
+
+    while (e >= c) {
+
+        if (avahi_utf8_valid(c))
+            break;
+
+        assert(*e & 128);
+        *e = 0;
+
+        e--;
+    }
+}
+
+char *avahi_alternative_host_name(const char *s) {
+    const char *e;
+    char *r;
+
+    assert(s);
 
-gchar * avahi_alternative_host_name(const gchar *s) {
-    const gchar *p, *e = NULL;
-    gchar *c, *r;
-    gint n;
+    if (!avahi_is_valid_host_name(s))
+        return NULL;
 
-    g_assert(s);
-    
-    for (p = s; *p; p++)
-        if (!isdigit(*p))
-            e = p+1;
+    if ((e = strrchr(s, '-'))) {
+        const char *p;
+
+        e++;
+
+        for (p = e; *p; p++)
+            if (!isdigit(*p)) {
+                e = NULL;
+                break;
+            }
+
+        if (e && (*e == '0' || *e == 0))
+            e = NULL;
+    }
+
+    if (e) {
+        char *c, *m;
+        size_t l;
+        int n;
 
-    if (e && *e)
         n = atoi(e)+1;
-    else
-        n = 2;
+        if (!(m = avahi_strdup_printf("%i", n)))
+            return NULL;
+
+        l = e-s-1;
+
+        if (l >= AVAHI_LABEL_MAX-1-strlen(m)-1)
+            l = AVAHI_LABEL_MAX-1-strlen(m)-1;
+
+        if (!(c = avahi_strndup(s, l))) {
+            avahi_free(m);
+            return NULL;
+        }
+
+        drop_incomplete_utf8(c);
+
+        r = avahi_strdup_printf("%s-%s", c, m);
+        avahi_free(c);
+        avahi_free(m);
+
+    } else {
+        char *c;
+
+        if (!(c = avahi_strndup(s, AVAHI_LABEL_MAX-1-2)))
+            return NULL;
+
+        drop_incomplete_utf8(c);
+
+        r = avahi_strdup_printf("%s-2", c);
+        avahi_free(c);
+    }
+
+    assert(avahi_is_valid_host_name(r));
 
-    c = e ? g_strndup(s, e-s) : g_strdup(s);
-    r = g_strdup_printf("%s%i", c, n);
-    g_free(c);
-    
     return r;
-    
 }
 
-gchar *avahi_alternative_service_name(const gchar *s) {
-    const gchar *e;
-    g_assert(s);
+char *avahi_alternative_service_name(const char *s) {
+    const char *e;
+    char *r;
+
+    assert(s);
+
+    if (!avahi_is_valid_service_name(s))
+        return NULL;
 
     if ((e = strstr(s, " #"))) {
-        const gchar *n, *p;
+        const char *n, *p;
         e += 2;
-    
+
         while ((n = strstr(e, " #")))
             e = n + 2;
 
@@ -69,13 +135,48 @@ gchar *avahi_alternative_service_name(const gchar *s) {
                 e = NULL;
                 break;
             }
+
+        if (e && (*e == '0' || *e == 0))
+            e = NULL;
     }
-    
+
     if (e) {
-        gchar *r, *c = g_strndup(s, e-s);
-        r = g_strdup_printf("%s%i", c, atoi(e)+1);
-        g_free(c);
-        return r;
-    } else
-        return g_strdup_printf("%s #2", s);
+        char *c, *m;
+        size_t l;
+        int n;
+
+        n = atoi(e)+1;
+        if (!(m = avahi_strdup_printf("%i", n)))
+            return NULL;
+
+        l = e-s-2;
+
+        if (l >= AVAHI_LABEL_MAX-1-strlen(m)-2)
+            l = AVAHI_LABEL_MAX-1-strlen(m)-2;
+
+        if (!(c = avahi_strndup(s, l))) {
+            avahi_free(m);
+            return NULL;
+        }
+
+        drop_incomplete_utf8(c);
+
+        r = avahi_strdup_printf("%s #%s", c, m);
+        avahi_free(c);
+        avahi_free(m);
+    } else {
+        char *c;
+
+        if (!(c = avahi_strndup(s, AVAHI_LABEL_MAX-1-3)))
+            return NULL;
+
+        drop_incomplete_utf8(c);
+
+        r = avahi_strdup_printf("%s #2", c);
+        avahi_free(c);
+    }
+
+    assert(avahi_is_valid_service_name(r));
+
+    return r;
 }