add new API function avahi_is_valid_fqdn()

git-svn-id: file:///home/lennart/svn/public/avahi/trunk@1168 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe

4 files changed, 50 insertions, 0 deletions

diff --git a/avahi-common/Makefile.am b/avahi-common/Makefile.am
index 96ef099..c786954 100644
--- a/avahi-common/Makefile.am
+++ b/avahi-common/Makefile.am
@@ -81,12 +81,14 @@ alternative_test_SOURCES = \
 	alternative.c alternative.h \
 	malloc.c malloc.h \
 	domain.c domain.h \
+	address.c address.h \
 	alternative-test.c
 alternative_test_CFLAGS = $(AM_CFLAGS)
 
 domain_test_SOURCES = \
 	domain.c domain.h \
 	malloc.c malloc.h \
+	address.c address.h \
 	domain-test.c
 domain_test_CFLAGS = $(AM_CFLAGS)
 
diff --git a/avahi-common/domain-test.c b/avahi-common/domain-test.c
index c9ff32e..0f7d851 100644
--- a/avahi-common/domain-test.c
+++ b/avahi-common/domain-test.c
@@ -111,6 +111,15 @@ int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char *argv[]) {
     assert(avahi_normalize_name(".", t, sizeof(t)));
     assert(avahi_normalize_name("", t, sizeof(t)));
 
+    assert(!avahi_is_valid_fqdn("."));
+    assert(!avahi_is_valid_fqdn(""));
+    assert(!avahi_is_valid_fqdn("foo"));
+    assert(avahi_is_valid_fqdn("foo.bar"));
+    assert(avahi_is_valid_fqdn("foo.bar."));
+    assert(avahi_is_valid_fqdn("gnurz.foo.bar."));
+    assert(!avahi_is_valid_fqdn("192.168.50.1"));
+    assert(!avahi_is_valid_fqdn("::1"));
+    assert(!avahi_is_valid_fqdn(".192.168.50.1."));
     
     return 0;
 }
diff --git a/avahi-common/domain.c b/avahi-common/domain.c
index 4927086..1ac8577 100644
--- a/avahi-common/domain.c
+++ b/avahi-common/domain.c
@@ -36,6 +36,7 @@
 #include "domain.h"
 #include "malloc.h"
 #include "error.h"
+#include "address.h"
 
 /* Read the first label from string *name, unescape "\" and write it to dest */
 char *avahi_unescape_label(const char **name, char *dest, size_t size) {
@@ -569,3 +570,38 @@ int avahi_service_name_split(const char *p, char *name, size_t name_size, char *
     return 0;
 }
 
+int avahi_is_valid_fqdn(const char *t) {
+    char label[AVAHI_LABEL_MAX];
+    char normalized[AVAHI_DOMAIN_NAME_MAX];
+    const char *k = t;
+    AvahiAddress a;
+    assert(t);
+
+    if (strlen(t) >= AVAHI_DOMAIN_NAME_MAX)
+        return 0;
+
+    if (!avahi_is_valid_domain_name(t))
+        return 0;
+
+    /* Check if there are at least two labels*/
+    if (!(avahi_unescape_label(&k, label, sizeof(label))))
+        return 0;
+
+    if (label[0] == 0 || !k)
+        return 0;
+
+    if (!(avahi_unescape_label(&k, label, sizeof(label))))
+        return 0;
+
+    if (label[0] == 0 || !k)
+        return 0;
+
+    /* Make sure that the name is not an IP address */
+    if (!(avahi_normalize_name(t, normalized, sizeof(normalized))))
+        return 0;
+    
+    if (avahi_address_parse(normalized, AVAHI_PROTO_UNSPEC, &a))
+        return 0;
+
+    return 1;
+}
diff --git a/avahi-common/domain.h b/avahi-common/domain.h
index 53897e7..7073e1c 100644
--- a/avahi-common/domain.h
+++ b/avahi-common/domain.h
@@ -89,6 +89,9 @@ int avahi_is_valid_service_name(const char *t);
 /** Return 1 when the specified string contains a valid non-FQDN host name (i.e. without dots), 0 otherwise */
 int avahi_is_valid_host_name(const char *t);
 
+/** Return 1 when the specified string contains a valid FQDN host name (i.e. with more than one label and non-numerical), 0 otherwise. \since 0.6.9 */
+int avahi_is_valid_fqdn(const char *t);
+
 /** Return some kind of hash value for the domain, useful for using domains as hash table keys. */
 unsigned avahi_domain_hash(const char *name);