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fix srr and add router-alert support to ipv4options patch

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This commit is contained in:
Harald Welte
2001-07-14 20:10:57 +00:00
parent 489b603722
commit 01aadcc84a
1 changed files with 37 additions and 1 deletions
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extensions/libipt_ipv4options.c
+37 -1
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@@ -18,7 +18,8 @@ help(void)
" --lsrr (match loose source routing flag)\n"
" --no-srr (match packets with no source routing)\n\n"
" [!] --rr (match record route flag)\n\n"
" [!] --ts (match timestamp flag)\n\n",
" [!] --ts (match timestamp flag)\n\n"
" [!] --ra (match router-alert option)\n\n",
NETFILTER_VERSION);
}
@@ -28,6 +29,7 @@ static struct option opts[] = {
{ "no-srr", 0, 0, '3'},
{ "rr", 0, 0, '4'},
{ "ts", 0, 0, '5'},
{ "ra", 0, 0, '6'},
{0}
};
@@ -154,6 +156,30 @@ parse(int c, char **argv, int invert, unsigned int *flags,
}
break;
/* router-alert */
case '6':
if ((!invert) && (*flags & IPT_IPV4OPTION_MATCH_ROUTER_ALERT))
exit_error(PARAMETER_PROBLEM,
"Can't specify --ra twice");
if (invert && (*flags & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT))
exit_error(PARAMETER_PROBLEM,
"Can't specify ! --rr twice");
if ((!invert) && (*flags & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT))
exit_error(PARAMETER_PROBLEM,
"Can't specify --ra with ! --ra");
if (invert && (*flags & IPT_IPV4OPTION_MATCH_ROUTER_ALERT))
exit_error(PARAMETER_PROBLEM,
"Can't specify ! --ra with --ra");
if (invert) {
info->options |= IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT;
*flags |= IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT;
}
else {
info->options |= IPT_IPV4OPTION_MATCH_ROUTER_ALERT;
*flags |= IPT_IPV4OPTION_MATCH_ROUTER_ALERT;
}
break;
default:
return 0;
}
@@ -191,6 +217,11 @@ print(const struct ipt_ip *ip,
printf(" TS");
else if (info->options & IPT_IPV4OPTION_DONT_MATCH_TIMESTAMP)
printf(" !TS");
if (info->options & IPT_IPV4OPTION_MATCH_ROUTER_ALERT)
printf(" RA");
else if (info->options & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT)
printf(" !RA");
printf(" ");
}
@@ -214,6 +245,11 @@ save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
printf(" --ts");
else if (info->options & IPT_IPV4OPTION_DONT_MATCH_TIMESTAMP)
printf(" ! --ts");
if (info->options & IPT_IPV4OPTION_MATCH_ROUTER_ALERT)
printf(" --ra");
else if (info->options & IPT_IPV4OPTION_DONT_MATCH_ROUTER_ALERT)
printf(" ! --ra");
printf(" ");
}