diff options
Diffstat (limited to 'xtoptions.c')
| -rw-r--r-- | xtoptions.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/xtoptions.c b/xtoptions.c index 631e7a3c..e9bcaa83 100644 --- a/xtoptions.c +++ b/xtoptions.c @@ -186,11 +186,40 @@ static void xtopt_parse_string(struct xt_option_call *cb) p[z] = '\0'; } +/** + * Validate the input for being conformant to "mark[/mask]". + */ +static void xtopt_parse_markmask(struct xt_option_call *cb) +{ + unsigned int mark = 0, mask = ~0U; + char *end; + + if (!xtables_strtoui(cb->arg, &end, &mark, 0, UINT32_MAX)) + xt_params->exit_err(PARAMETER_PROBLEM, + "%s: bad mark value for option \"--%s\", " + "or out of range.\n", + cb->ext_name, cb->entry->name); + if (*end == '/' && + !xtables_strtoui(end + 1, &end, &mask, 0, UINT32_MAX)) + xt_params->exit_err(PARAMETER_PROBLEM, + "%s: bad mask value for option \"--%s\", " + "or out of range.\n", + cb->ext_name, cb->entry->name); + if (*end != '\0') + xt_params->exit_err(PARAMETER_PROBLEM, + "%s: trailing garbage after value " + "for option \"--%s\".\n", + cb->ext_name, cb->entry->name); + cb->val.mark = mark; + cb->val.mask = mask; +} + static void (*const xtopt_subparse[])(struct xt_option_call *) = { [XTTYPE_UINT8] = xtopt_parse_int, [XTTYPE_UINT32] = xtopt_parse_int, [XTTYPE_UINT32RC] = xtopt_parse_mint, [XTTYPE_STRING] = xtopt_parse_string, + [XTTYPE_MARKMASK32] = xtopt_parse_markmask, }; static const size_t xtopt_psize[] = { |