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-rw-r--r--src/basic/af-list.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/basic/af-list.c b/src/basic/af-list.c
new file mode 100644
index 0000000..a9ab891
--- /dev/null
+++ b/src/basic/af-list.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <string.h>
+#include <sys/socket.h>
+
+#include "af-list.h"
+#include "macro.h"
+
+static const struct af_name* lookup_af(register const char *str, register GPERF_LEN_TYPE len);
+
+#include "af-from-name.h"
+#include "af-to-name.h"
+
+const char *af_to_name(int id) {
+
+ if (id <= 0)
+ return NULL;
+
+ if ((size_t) id >= ELEMENTSOF(af_names))
+ return NULL;
+
+ return af_names[id];
+}
+
+int af_from_name(const char *name) {
+ const struct af_name *sc;
+
+ assert(name);
+
+ sc = lookup_af(name, strlen(name));
+ if (!sc)
+ return -EINVAL;
+
+ return sc->id;
+}
+
+int af_max(void) {
+ return ELEMENTSOF(af_names);
+}
+
+const char *af_to_ipv4_ipv6(int id) {
+ /* Pretty often we want to map the address family to the typically used protocol name for IPv4 +
+ * IPv6. Let's add special helpers for that. */
+ return id == AF_INET ? "ipv4" :
+ id == AF_INET6 ? "ipv6" : NULL;
+}
+
+int af_from_ipv4_ipv6(const char *af) {
+ return streq_ptr(af, "ipv4") ? AF_INET :
+ streq_ptr(af, "ipv6") ? AF_INET6 : AF_UNSPEC;
+}