diff options
author | Alexey Dobriyan <adobriyan@sw.ru> | 2008-04-14 07:56:02 (GMT) |
---|---|---|
committer | Patrick McHardy <kaber@trash.net> | 2008-04-14 07:56:02 (GMT) |
commit | 666953df353194bef76086fa3f126241cbac3e3a (patch) | |
tree | bd69afed2996b0a521361efcd29e32ea7606e9ff /net/ipv4/netfilter | |
parent | 36e2a1b0f7f2598e38952494b91490f58aa221c8 (diff) | |
download | linux-666953df353194bef76086fa3f126241cbac3e3a.tar.xz |
[NETFILTER]: ip_tables: per-netns FILTER/MANGLE/RAW tables for real
Commit 9335f047fe61587ec82ff12fbb1220bcfdd32006 aka
"[NETFILTER]: ip_tables: per-netns FILTER, MANGLE, RAW"
added per-netns _view_ of iptables rules. They were shown to user, but
ignored by filtering code. Now that it's possible to at least ping loopback,
per-netns tables can affect filtering decisions.
netns is taken in case of
PRE_ROUTING, LOCAL_IN -- from in device,
POST_ROUTING, LOCAL_OUT -- from out device,
FORWARD -- from in device which should be equal to out device's netns.
This code is relatively new, so BUG_ON was plugged.
Wrappers were added to a) keep code the same from CONFIG_NET_NS=n users
(overwhelming majority), b) consolidate code in one place -- similar
changes will be done in ipv6 and arp netfilter code.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4/netfilter')
-rw-r--r-- | net/ipv4/netfilter/iptable_filter.c | 19 | ||||
-rw-r--r-- | net/ipv4/netfilter/iptable_mangle.c | 49 | ||||
-rw-r--r-- | net/ipv4/netfilter/iptable_raw.c | 6 |
3 files changed, 62 insertions, 12 deletions
diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c index 69f3d7e..7fcf60a 100644 --- a/net/ipv4/netfilter/iptable_filter.c +++ b/net/ipv4/netfilter/iptable_filter.c @@ -63,13 +63,25 @@ static struct xt_table packet_filter = { /* The work comes in here from netfilter.c. */ static unsigned int +ipt_local_in_hook(unsigned int hook, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) +{ + return ipt_do_table(skb, hook, in, out, + nf_local_in_net(in, out)->ipv4.iptable_filter); +} + +static unsigned int ipt_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_filter); + return ipt_do_table(skb, hook, in, out, + nf_forward_net(in, out)->ipv4.iptable_filter); } static unsigned int @@ -88,12 +100,13 @@ ipt_local_out_hook(unsigned int hook, return NF_ACCEPT; } - return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_filter); + return ipt_do_table(skb, hook, in, out, + nf_local_out_net(in, out)->ipv4.iptable_filter); } static struct nf_hook_ops ipt_ops[] __read_mostly = { { - .hook = ipt_hook, + .hook = ipt_local_in_hook, .owner = THIS_MODULE, .pf = PF_INET, .hooknum = NF_INET_LOCAL_IN, diff --git a/net/ipv4/netfilter/iptable_mangle.c b/net/ipv4/netfilter/iptable_mangle.c index c55a210..ba82703 100644 --- a/net/ipv4/netfilter/iptable_mangle.c +++ b/net/ipv4/netfilter/iptable_mangle.c @@ -74,13 +74,47 @@ static struct xt_table packet_mangler = { /* The work comes in here from netfilter.c. */ static unsigned int -ipt_route_hook(unsigned int hook, +ipt_pre_routing_hook(unsigned int hook, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) +{ + return ipt_do_table(skb, hook, in, out, + nf_pre_routing_net(in, out)->ipv4.iptable_mangle); +} + +static unsigned int +ipt_post_routing_hook(unsigned int hook, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) +{ + return ipt_do_table(skb, hook, in, out, + nf_post_routing_net(in, out)->ipv4.iptable_mangle); +} + +static unsigned int +ipt_local_in_hook(unsigned int hook, + struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + int (*okfn)(struct sk_buff *)) +{ + return ipt_do_table(skb, hook, in, out, + nf_local_in_net(in, out)->ipv4.iptable_mangle); +} + +static unsigned int +ipt_forward_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_mangle); + return ipt_do_table(skb, hook, in, out, + nf_forward_net(in, out)->ipv4.iptable_mangle); } static unsigned int @@ -112,7 +146,8 @@ ipt_local_hook(unsigned int hook, daddr = iph->daddr; tos = iph->tos; - ret = ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_mangle); + ret = ipt_do_table(skb, hook, in, out, + nf_local_out_net(in, out)->ipv4.iptable_mangle); /* Reroute for ANY change. */ if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE) { iph = ip_hdr(skb); @@ -130,21 +165,21 @@ ipt_local_hook(unsigned int hook, static struct nf_hook_ops ipt_ops[] __read_mostly = { { - .hook = ipt_route_hook, + .hook = ipt_pre_routing_hook, .owner = THIS_MODULE, .pf = PF_INET, .hooknum = NF_INET_PRE_ROUTING, .priority = NF_IP_PRI_MANGLE, }, { - .hook = ipt_route_hook, + .hook = ipt_local_in_hook, .owner = THIS_MODULE, .pf = PF_INET, .hooknum = NF_INET_LOCAL_IN, .priority = NF_IP_PRI_MANGLE, }, { - .hook = ipt_route_hook, + .hook = ipt_forward_hook, .owner = THIS_MODULE, .pf = PF_INET, .hooknum = NF_INET_FORWARD, @@ -158,7 +193,7 @@ static struct nf_hook_ops ipt_ops[] __read_mostly = { .priority = NF_IP_PRI_MANGLE, }, { - .hook = ipt_route_hook, + .hook = ipt_post_routing_hook, .owner = THIS_MODULE, .pf = PF_INET, .hooknum = NF_INET_POST_ROUTING, diff --git a/net/ipv4/netfilter/iptable_raw.c b/net/ipv4/netfilter/iptable_raw.c index e41fe8c..4b68974 100644 --- a/net/ipv4/netfilter/iptable_raw.c +++ b/net/ipv4/netfilter/iptable_raw.c @@ -52,7 +52,8 @@ ipt_hook(unsigned int hook, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_raw); + return ipt_do_table(skb, hook, in, out, + nf_pre_routing_net(in, out)->ipv4.iptable_raw); } static unsigned int @@ -70,7 +71,8 @@ ipt_local_hook(unsigned int hook, "packet.\n"); return NF_ACCEPT; } - return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_raw); + return ipt_do_table(skb, hook, in, out, + nf_local_out_net(in, out)->ipv4.iptable_raw); } /* 'raw' is the very first table. */ |