#include <errno.h>
#include <netinet/in.h>
-#include <string.h>
+#include "alloc-util.h"
#include "ip-protocol-list.h"
+#include "parse-util.h"
+#include "string-util.h"
#include "macro.h"
static const struct ip_protocol_name* lookup_ip_protocol(register const char *str, register GPERF_LEN_TYPE len);
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;
+}