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authorLennart Poettering <lennart@poettering.net>2016-11-18 16:55:01 +0100
committerLennart Poettering <lennart@poettering.net>2016-11-21 22:58:26 +0100
commit08a4849ec94fd06c3284994b91835b31a3a2f3aa (patch)
tree103141ee3a0db934d44bdf1e964ec682060fe658 /src
parentfd18634de4d84eba2422908948c27ec6c5bf4cf5 (diff)
shared: add new API to validate a string as hostname or IP address
Diffstat (limited to 'src')
-rw-r--r--src/shared/dns-domain.c12
-rw-r--r--src/shared/dns-domain.h2
-rw-r--r--src/test/test-dns-domain.c13
3 files changed, 27 insertions, 0 deletions
diff --git a/src/shared/dns-domain.c b/src/shared/dns-domain.c
index f9a6fd5f03..33debadb15 100644
--- a/src/shared/dns-domain.c
+++ b/src/shared/dns-domain.c
@@ -1324,3 +1324,15 @@ int dns_name_apply_idna(const char *name, char **ret) {
return (int) n;
}
+
+int dns_name_is_valid_or_address(const char *name) {
+ /* Returns > 0 if the specified name is either a valid IP address formatted as string or a valid DNS name */
+
+ if (isempty(name))
+ return 0;
+
+ if (in_addr_from_string_auto(name, NULL, NULL) >= 0)
+ return 1;
+
+ return dns_name_is_valid(name);
+}
diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h
index af780f0b8b..03f160369c 100644
--- a/src/shared/dns-domain.h
+++ b/src/shared/dns-domain.h
@@ -107,3 +107,5 @@ int dns_name_equal_skip(const char *a, unsigned n_labels, const char *b);
int dns_name_common_suffix(const char *a, const char *b, const char **ret);
int dns_name_apply_idna(const char *name, char **ret);
+
+int dns_name_is_valid_or_address(const char *name);
diff --git a/src/test/test-dns-domain.c b/src/test/test-dns-domain.c
index e2f097c95e..b4db4a6702 100644
--- a/src/test/test-dns-domain.c
+++ b/src/test/test-dns-domain.c
@@ -627,6 +627,18 @@ static void test_dns_name_apply_idna(void) {
test_dns_name_apply_idna_one("föö.bär.", "xn--f-1gaa.xn--br-via");
}
+static void test_dns_name_is_valid_or_address(void) {
+ assert_se(dns_name_is_valid_or_address(NULL) == 0);
+ assert_se(dns_name_is_valid_or_address("") == 0);
+ assert_se(dns_name_is_valid_or_address("foobar") > 0);
+ assert_se(dns_name_is_valid_or_address("foobar.com") > 0);
+ assert_se(dns_name_is_valid_or_address("foobar..com") == 0);
+ assert_se(dns_name_is_valid_or_address("foobar.com.") > 0);
+ assert_se(dns_name_is_valid_or_address("127.0.0.1") > 0);
+ assert_se(dns_name_is_valid_or_address("::") > 0);
+ assert_se(dns_name_is_valid_or_address("::1") > 0);
+}
+
int main(int argc, char *argv[]) {
test_dns_label_unescape();
@@ -654,6 +666,7 @@ int main(int argc, char *argv[]) {
test_dns_name_compare_func();
test_dns_name_common_suffix();
test_dns_name_apply_idna();
+ test_dns_name_is_valid_or_address();
return 0;
}