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@@ -18,12 +18,14 @@
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter/xt_DSCP.h>
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+#include <linux/netfilter_ipv4/ipt_TOS.h>
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MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
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MODULE_DESCRIPTION("x_tables DSCP modification module");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("ipt_DSCP");
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MODULE_ALIAS("ip6t_DSCP");
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+MODULE_ALIAS("ipt_TOS");
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static unsigned int
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dscp_tg(struct sk_buff *skb, const struct net_device *in,
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@@ -76,6 +78,45 @@ dscp_tg_check(const char *tablename, const void *e_void,
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return true;
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}
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+static unsigned int
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+tos_tg_v0(struct sk_buff *skb, const struct net_device *in,
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+ const struct net_device *out, unsigned int hooknum,
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+ const struct xt_target *target, const void *targinfo)
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+{
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+ const struct ipt_tos_target_info *info = targinfo;
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+ struct iphdr *iph = ip_hdr(skb);
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+ u_int8_t oldtos;
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+
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+ if ((iph->tos & IPTOS_TOS_MASK) != info->tos) {
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+ if (!skb_make_writable(skb, sizeof(struct iphdr)))
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+ return NF_DROP;
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+
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+ iph = ip_hdr(skb);
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+ oldtos = iph->tos;
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+ iph->tos = (iph->tos & IPTOS_PREC_MASK) | info->tos;
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+ csum_replace2(&iph->check, htons(oldtos), htons(iph->tos));
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+ }
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+
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+ return XT_CONTINUE;
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+}
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+
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+static bool
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+tos_tg_check_v0(const char *tablename, const void *e_void,
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+ const struct xt_target *target, void *targinfo,
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+ unsigned int hook_mask)
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+{
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+ const u_int8_t tos = ((struct ipt_tos_target_info *)targinfo)->tos;
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+
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+ if (tos != IPTOS_LOWDELAY && tos != IPTOS_THROUGHPUT &&
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+ tos != IPTOS_RELIABILITY && tos != IPTOS_MINCOST &&
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+ tos != IPTOS_NORMALSVC) {
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+ printk(KERN_WARNING "TOS: bad tos value %#x\n", tos);
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+ return false;
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+ }
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+
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+ return true;
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+}
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+
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static struct xt_target dscp_tg_reg[] __read_mostly = {
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{
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.name = "DSCP",
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@@ -95,6 +136,16 @@ static struct xt_target dscp_tg_reg[] __read_mostly = {
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.table = "mangle",
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.me = THIS_MODULE,
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},
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+ {
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+ .name = "TOS",
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+ .revision = 0,
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+ .family = AF_INET,
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+ .table = "mangle",
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+ .target = tos_tg_v0,
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+ .targetsize = sizeof(struct ipt_tos_target_info),
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+ .checkentry = tos_tg_check_v0,
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+ .me = THIS_MODULE,
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+ },
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};
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static int __init dscp_tg_init(void)
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