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author | Jan Engelhardt <jengelh@computergmbh.de> | 2007-12-04 23:38:13 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:55:59 -0800 |
commit | c9fd49680954714473d6cbd2546d6ff120f96840 (patch) | |
tree | e848220ea1a3133cb16ec9eb5dbe49cf29e70474 /net/netfilter/xt_DSCP.c | |
parent | c3b33e6a2cdefba38d83442ebae2ee42e853ea51 (diff) | |
download | linux-stable-c9fd49680954714473d6cbd2546d6ff120f96840.tar.gz linux-stable-c9fd49680954714473d6cbd2546d6ff120f96840.tar.bz2 linux-stable-c9fd49680954714473d6cbd2546d6ff120f96840.zip |
[NETFILTER]: Merge ipt_TOS into xt_DSCP
Merge ipt_TOS into xt_DSCP.
Merge ipt_TOS (tos v0 target) into xt_DSCP. They both modify the same
field in the IPv4 header, so it seems reasonable to keep them in one
piece. This is part two of the implicit 4-patch series to move tos to
xtables and extend it by IPv6.
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/xt_DSCP.c')
-rw-r--r-- | net/netfilter/xt_DSCP.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/net/netfilter/xt_DSCP.c b/net/netfilter/xt_DSCP.c index 188235587979..40a4f1d71916 100644 --- a/net/netfilter/xt_DSCP.c +++ b/net/netfilter/xt_DSCP.c @@ -18,12 +18,14 @@ #include <linux/netfilter/x_tables.h> #include <linux/netfilter/xt_DSCP.h> +#include <linux/netfilter_ipv4/ipt_TOS.h> MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); MODULE_DESCRIPTION("x_tables DSCP modification module"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ipt_DSCP"); MODULE_ALIAS("ip6t_DSCP"); +MODULE_ALIAS("ipt_TOS"); static unsigned int dscp_tg(struct sk_buff *skb, const struct net_device *in, @@ -76,6 +78,45 @@ dscp_tg_check(const char *tablename, const void *e_void, return true; } +static unsigned int +tos_tg_v0(struct sk_buff *skb, const struct net_device *in, + const struct net_device *out, unsigned int hooknum, + const struct xt_target *target, const void *targinfo) +{ + const struct ipt_tos_target_info *info = targinfo; + struct iphdr *iph = ip_hdr(skb); + u_int8_t oldtos; + + if ((iph->tos & IPTOS_TOS_MASK) != info->tos) { + if (!skb_make_writable(skb, sizeof(struct iphdr))) + return NF_DROP; + + iph = ip_hdr(skb); + oldtos = iph->tos; + iph->tos = (iph->tos & IPTOS_PREC_MASK) | info->tos; + csum_replace2(&iph->check, htons(oldtos), htons(iph->tos)); + } + + return XT_CONTINUE; +} + +static bool +tos_tg_check_v0(const char *tablename, const void *e_void, + const struct xt_target *target, void *targinfo, + unsigned int hook_mask) +{ + const u_int8_t tos = ((struct ipt_tos_target_info *)targinfo)->tos; + + if (tos != IPTOS_LOWDELAY && tos != IPTOS_THROUGHPUT && + tos != IPTOS_RELIABILITY && tos != IPTOS_MINCOST && + tos != IPTOS_NORMALSVC) { + printk(KERN_WARNING "TOS: bad tos value %#x\n", tos); + return false; + } + + return true; +} + static struct xt_target dscp_tg_reg[] __read_mostly = { { .name = "DSCP", @@ -95,6 +136,16 @@ static struct xt_target dscp_tg_reg[] __read_mostly = { .table = "mangle", .me = THIS_MODULE, }, + { + .name = "TOS", + .revision = 0, + .family = AF_INET, + .table = "mangle", + .target = tos_tg_v0, + .targetsize = sizeof(struct ipt_tos_target_info), + .checkentry = tos_tg_check_v0, + .me = THIS_MODULE, + }, }; static int __init dscp_tg_init(void) |