Move IP address parsing functions to utils.

[project/netifd.git] / utils.c

diff --git a/utils.c b/utils.c
index 65109d7..986cee9 100644 (file)
--- a/utils.c
+++ b/utils.c
@@ -15,6 +15,9 @@
 #include <stdlib.h>
 #include "utils.h"
 
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
 void
 __vlist_simple_init(struct vlist_simple_tree *tree, int offset)
 {
@@ -66,3 +69,63 @@ vlist_simple_flush_all(struct vlist_simple_tree *tree)
        tree->version = -1;
        vlist_simple_flush(tree);
 }
+
+unsigned int
+parse_netmask_string(const char *str, bool v6)
+{
+       struct in_addr addr;
+       unsigned int ret;
+       char *err = NULL;
+
+       if (!strchr(str, '.')) {
+               ret = strtoul(str, &err, 0);
+               if (err && *err)
+                       goto error;
+
+               return ret;
+       }
+
+       if (v6)
+               goto error;
+
+       if (inet_aton(str, &addr) != 1)
+               goto error;
+
+       return 32 - fls(~(ntohl(addr.s_addr)));
+
+error:
+       return ~0;
+}
+
+bool
+split_netmask(char *str, unsigned int *netmask, bool v6)
+{
+       char *delim = strchr(str, '/');
+
+       if (delim) {
+               *(delim++) = 0;
+
+               *netmask = parse_netmask_string(delim, v6);
+       }
+       return true;
+}
+
+int
+parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
+{
+       char *astr = alloca(strlen(str) + 1);
+
+       strcpy(astr, str);
+       if (!split_netmask(astr, netmask, af == AF_INET6))
+               return 0;
+
+       if (af == AF_INET6) {
+               if (*netmask > 128)
+                       return 0;
+       } else {
+               if (*netmask > 32)
+                       return 0;
+       }
+
+       return inet_pton(af, astr, addr);
+}