#ifdef __KERNEL__
#include <linux/init.h>
-#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/net.h>
#include <linux/if.h>
+#include <linux/in.h>
+#include <linux/in6.h>
#include <linux/wait.h>
#include <linux/list.h>
#endif
+#include <linux/types.h>
#include <linux/compiler.h>
/* Responses from hook functions. */
#define NF_VERDICT_QMASK 0xffff0000
#define NF_VERDICT_QBITS 16
-#define NF_QUEUE_NR(x) (((x << NF_VERDICT_QBITS) & NF_VERDICT_QMASK) | NF_QUEUE)
+#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE)
/* only for userspace compatibility */
#ifndef __KERNEL__
NF_INET_NUMHOOKS
};
+enum {
+ NFPROTO_UNSPEC = 0,
+ NFPROTO_IPV4 = 2,
+ NFPROTO_ARP = 3,
+ NFPROTO_BRIDGE = 7,
+ NFPROTO_IPV6 = 10,
+ NFPROTO_DECNET = 12,
+ NFPROTO_NUMPROTO,
+};
+
+union nf_inet_addr {
+ __u32 all[4];
+ __be32 ip;
+ __be32 ip6[4];
+ struct in_addr in;
+ struct in6_addr in6;
+};
+
#ifdef __KERNEL__
#ifdef CONFIG_NETFILTER
+static inline int nf_inet_addr_cmp(const union nf_inet_addr *a1,
+ const union nf_inet_addr *a2)
+{
+ return a1->all[0] == a2->all[0] &&
+ a1->all[1] == a2->all[1] &&
+ a1->all[2] == a2->all[2] &&
+ a1->all[3] == a2->all[3];
+}
+
extern void netfilter_init(void);
/* Largest hook number + 1 */
#define NF_MAX_HOOKS 8
struct sk_buff;
-struct net_device;
typedef unsigned int nf_hookfn(unsigned int hooknum,
struct sk_buff *skb,
const struct net_device *out,
int (*okfn)(struct sk_buff *));
-struct nf_hook_ops
-{
+struct nf_hook_ops {
struct list_head list;
/* User fills in from here down. */
nf_hookfn *hook;
struct module *owner;
- int pf;
- int hooknum;
+ u_int8_t pf;
+ unsigned int hooknum;
/* Hooks are ordered in ascending priority. */
int priority;
};
-struct nf_sockopt_ops
-{
+struct nf_sockopt_ops {
struct list_head list;
- int pf;
+ u_int8_t pf;
/* Non-inclusive ranges: use 0/0/NULL to never get called. */
int set_optmin;
int set_optmax;
int (*set)(struct sock *sk, int optval, void __user *user, unsigned int len);
+#ifdef CONFIG_COMPAT
int (*compat_set)(struct sock *sk, int optval,
void __user *user, unsigned int len);
-
+#endif
int get_optmin;
int get_optmax;
int (*get)(struct sock *sk, int optval, void __user *user, int *len);
+#ifdef CONFIG_COMPAT
int (*compat_get)(struct sock *sk, int optval,
void __user *user, int *len);
-
+#endif
/* Use the module struct to lock set/get code in place */
struct module *owner;
};
#ifdef CONFIG_SYSCTL
/* Sysctl registration */
-struct ctl_table_header *nf_register_sysctl_table(struct ctl_table *path,
- struct ctl_table *table);
-void nf_unregister_sysctl_table(struct ctl_table_header *header,
- struct ctl_table *table);
-extern struct ctl_table nf_net_netfilter_sysctl_path[];
-extern struct ctl_table nf_net_ipv4_netfilter_sysctl_path[];
+extern struct ctl_path nf_net_netfilter_sysctl_path[];
+extern struct ctl_path nf_net_ipv4_netfilter_sysctl_path[];
#endif /* CONFIG_SYSCTL */
-extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
+extern struct list_head nf_hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
-int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
+int nf_hook_slow(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *), int thresh);
* okfn must be invoked by the caller in this case. Any other return
* value indicates the packet has been consumed by the hook.
*/
-static inline int nf_hook_thresh(int pf, unsigned int hook,
+static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook,
struct sk_buff *skb,
struct net_device *indev,
struct net_device *outdev,
- int (*okfn)(struct sk_buff *), int thresh,
- int cond)
+ int (*okfn)(struct sk_buff *), int thresh)
{
- if (!cond)
- return 1;
#ifndef CONFIG_NETFILTER_DEBUG
if (list_empty(&nf_hooks[pf][hook]))
return 1;
return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
}
-static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
+static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *))
{
- return nf_hook_thresh(pf, hook, skb, indev, outdev, okfn, INT_MIN, 1);
+ return nf_hook_thresh(pf, hook, skb, indev, outdev, okfn, INT_MIN);
}
/* Activate hook; either okfn or kfree_skb called, unless a hook
coders :)
*/
-/* This is gross, but inline doesn't cut it for avoiding the function
- call in fast path: gcc doesn't inline (needs value tracking?). --RR */
-
-/* HX: It's slightly less gross now. */
-
-#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
-({int __ret; \
-if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, thresh, 1)) == 1)\
- __ret = (okfn)(skb); \
-__ret;})
+static inline int
+NF_HOOK_THRESH(uint8_t pf, unsigned int hook, struct sk_buff *skb,
+ struct net_device *in, struct net_device *out,
+ int (*okfn)(struct sk_buff *), int thresh)
+{
+ int ret = nf_hook_thresh(pf, hook, skb, in, out, okfn, thresh);
+ if (ret == 1)
+ ret = okfn(skb);
+ return ret;
+}
-#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) \
-({int __ret; \
-if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, INT_MIN, cond)) == 1)\
- __ret = (okfn)(skb); \
-__ret;})
+static inline int
+NF_HOOK_COND(uint8_t pf, unsigned int hook, struct sk_buff *skb,
+ struct net_device *in, struct net_device *out,
+ int (*okfn)(struct sk_buff *), bool cond)
+{
+ int ret = 1;
+ if (cond ||
+ (ret = nf_hook_thresh(pf, hook, skb, in, out, okfn, INT_MIN) == 1))
+ ret = okfn(skb);
+ return ret;
+}
-#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
- NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, INT_MIN)
+static inline int
+NF_HOOK(uint8_t pf, unsigned int hook, struct sk_buff *skb,
+ struct net_device *in, struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ return NF_HOOK_THRESH(pf, hook, skb, in, out, okfn, INT_MIN);
+}
/* Call setsockopt() */
-int nf_setsockopt(struct sock *sk, int pf, int optval, char __user *opt,
- int len);
-int nf_getsockopt(struct sock *sk, int pf, int optval, char __user *opt,
+int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
+ unsigned int len);
+int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
int *len);
-
-int compat_nf_setsockopt(struct sock *sk, int pf, int optval,
- char __user *opt, int len);
-int compat_nf_getsockopt(struct sock *sk, int pf, int optval,
+#ifdef CONFIG_COMPAT
+int compat_nf_setsockopt(struct sock *sk, u_int8_t pf, int optval,
+ char __user *opt, unsigned int len);
+int compat_nf_getsockopt(struct sock *sk, u_int8_t pf, int optval,
char __user *opt, int *len);
+#endif
/* Call this before modifying an existing packet: ensures it is
modifiable and linear to the point you care about (writable_len).
unsigned short family;
__sum16 (*checksum)(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol);
+ __sum16 (*checksum_partial)(struct sk_buff *skb,
+ unsigned int hook,
+ unsigned int dataoff,
+ unsigned int len,
+ u_int8_t protocol);
int (*route)(struct dst_entry **dst, struct flowi *fl);
void (*saveroute)(const struct sk_buff *skb,
struct nf_queue_entry *entry);
int route_key_size;
};
-extern struct nf_afinfo *nf_afinfo[];
-static inline struct nf_afinfo *nf_get_afinfo(unsigned short family)
+extern const struct nf_afinfo *nf_afinfo[NFPROTO_NUMPROTO];
+static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family)
{
return rcu_dereference(nf_afinfo[family]);
}
nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
u_int8_t protocol, unsigned short family)
{
- struct nf_afinfo *afinfo;
+ const struct nf_afinfo *afinfo;
__sum16 csum = 0;
rcu_read_lock();
return csum;
}
-extern int nf_register_afinfo(struct nf_afinfo *afinfo);
-extern void nf_unregister_afinfo(struct nf_afinfo *afinfo);
+static inline __sum16
+nf_checksum_partial(struct sk_buff *skb, unsigned int hook,
+ unsigned int dataoff, unsigned int len,
+ u_int8_t protocol, unsigned short family)
+{
+ const struct nf_afinfo *afinfo;
+ __sum16 csum = 0;
+
+ rcu_read_lock();
+ afinfo = nf_get_afinfo(family);
+ if (afinfo)
+ csum = afinfo->checksum_partial(skb, hook, dataoff, len,
+ protocol);
+ rcu_read_unlock();
+ return csum;
+}
+
+extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
+extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
#include <net/flow.h>
extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
static inline void
-nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family)
+nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
{
-#if defined(CONFIG_IP_NF_NAT_NEEDED) || defined(CONFIG_NF_NAT_NEEDED)
+#ifdef CONFIG_NF_NAT_NEEDED
void (*decodefn)(struct sk_buff *, struct flowi *);
- if (family == AF_INET && (decodefn = ip_nat_decode_session) != NULL)
- decodefn(skb, fl);
+ if (family == AF_INET) {
+ rcu_read_lock();
+ decodefn = rcu_dereference(ip_nat_decode_session);
+ if (decodefn)
+ decodefn(skb, fl);
+ rcu_read_unlock();
+ }
#endif
}
#else /* !CONFIG_NETFILTER */
#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) (okfn)(skb)
-static inline int nf_hook_thresh(int pf, unsigned int hook,
+static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook,
struct sk_buff *skb,
struct net_device *indev,
struct net_device *outdev,
- int (*okfn)(struct sk_buff *), int thresh,
- int cond)
+ int (*okfn)(struct sk_buff *), int thresh)
{
return okfn(skb);
}
-static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
+static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *))
{
}
struct flowi;
static inline void
-nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family) {}
+nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
+{
+}
#endif /*CONFIG_NETFILTER*/
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff