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-rw-r--r--src/shared/ip-protocol-list.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/shared/ip-protocol-list.c b/src/shared/ip-protocol-list.c
new file mode 100644
index 0000000..aa675ea
--- /dev/null
+++ b/src/shared/ip-protocol-list.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <netinet/in.h>
+
+#include "alloc-util.h"
+#include "ip-protocol-list.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+static const struct ip_protocol_name* lookup_ip_protocol(register const char *str, register GPERF_LEN_TYPE len);
+
+#include "ip-protocol-from-name.h"
+#include "ip-protocol-to-name.h"
+
+const char *ip_protocol_to_name(int id) {
+
+ if (id < 0)
+ return NULL;
+
+ if ((size_t) id >= ELEMENTSOF(ip_protocol_names))
+ return NULL;
+
+ return ip_protocol_names[id];
+}
+
+int ip_protocol_from_name(const char *name) {
+ const struct ip_protocol_name *sc;
+
+ assert(name);
+
+ sc = lookup_ip_protocol(name, strlen(name));
+ if (!sc)
+ return -EINVAL;
+
+ return sc->id;
+}
+
+int parse_ip_protocol(const char *s) {
+ _cleanup_free_ char *str = NULL;
+ int i, r;
+
+ assert(s);
+
+ if (isempty(s))
+ return IPPROTO_IP;
+
+ /* Do not use strdupa() here, as the input string may come from *
+ * command line or config files. */
+ str = strdup(s);
+ if (!str)
+ return -ENOMEM;
+
+ i = ip_protocol_from_name(ascii_strlower(str));
+ if (i >= 0)
+ return i;
+
+ r = safe_atoi(str, &i);
+ if (r < 0)
+ return r;
+
+ if (!ip_protocol_to_name(i))
+ return -EINVAL;
+
+ return i;
+}