Don't eat numeric arguments for other extensions

diff --git a/extensions/libipt_ttl.c b/extensions/libipt_ttl.c
index db5b002a1cdb597cbdc264e14cefbf01d7451618..f9d52822d8e65b357e9d1ea4613b8f02232648ad 100644 (file)
--- a/extensions/libipt_ttl.c
+++ b/extensions/libipt_ttl.c
@@ -33,12 +33,12 @@ static int parse(int c, char **argv, int invert, unsigned int *flags,
 
        check_inverse(optarg, &invert, &optind, 0);
 
-       if (string_to_number(optarg, 0, 255, &value) == -1)
-               exit_error(PARAMETER_PROBLEM,
-                          "ttl: Expected value between 0 and 255");
-
        switch (c) {
                case '2':
+                       if (string_to_number(optarg, 0, 255, &value) == -1)
+                               exit_error(PARAMETER_PROBLEM,
+                                          "ttl: Expected value between 0 and 255");
+
                        if (invert)
                                info->mode = IPT_TTL_NE;
                        else
@@ -48,6 +48,10 @@ static int parse(int c, char **argv, int invert, unsigned int *flags,
                        info->ttl = value;
                        break;
                case '3':
+                       if (string_to_number(optarg, 0, 255, &value) == -1)
+                               exit_error(PARAMETER_PROBLEM,
+                                          "ttl: Expected value between 0 and 255");
+
                        if (invert) 
                                exit_error(PARAMETER_PROBLEM,
                                                "ttl: unexpected `!'");
@@ -56,6 +60,10 @@ static int parse(int c, char **argv, int invert, unsigned int *flags,
                        info->ttl = value;
                        break;
                case '4':
+                       if (string_to_number(optarg, 0, 255, &value) == -1)
+                               exit_error(PARAMETER_PROBLEM,
+                                          "ttl: Expected value between 0 and 255");
+
                        if (invert)
                                exit_error(PARAMETER_PROBLEM,
                                                "ttl: unexpected `!'");