author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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#ifndef __LINUX_NETFILTER_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define __LINUX_NETFILTER_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifdef __KERNEL__ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/init.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/skbuff.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/net.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/if.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/in.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/in6.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/wait.h> |
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#include <linux/list.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#endif |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/types.h> |
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#include <linux/compiler.h> |
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/* Responses from hook functions. */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define NF_DROP 0 |
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#define NF_ACCEPT 1 |
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#define NF_STOLEN 2 |
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#define NF_QUEUE 3 |
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#define NF_REPEAT 4 |
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#define NF_STOP 5 |
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#define NF_MAX_VERDICT NF_STOP |
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/* we overload the higher bits for encoding auxiliary data such as the queue |
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* number. Not nice, but better than additional function arguments. */ |
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#define NF_VERDICT_MASK 0x0000ffff |
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#define NF_VERDICT_BITS 16 |
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#define NF_VERDICT_QMASK 0xffff0000 |
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#define NF_VERDICT_QBITS 16 |
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#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE) |
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|
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/* only for userspace compatibility */ |
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#ifndef __KERNEL__ |
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/* Generic cache responses from hook functions. |
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<= 0x2000 is used for protocol-flags. */ |
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#define NFC_UNKNOWN 0x4000 |
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#define NFC_ALTERED 0x8000 |
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#endif |
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enum nf_inet_hooks { |
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NF_INET_PRE_ROUTING, |
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NF_INET_LOCAL_IN, |
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NF_INET_FORWARD, |
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NF_INET_LOCAL_OUT, |
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NF_INET_POST_ROUTING, |
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NF_INET_NUMHOOKS |
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}; |
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|
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enum { |
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NFPROTO_UNSPEC = 0, |
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NFPROTO_IPV4 = 2, |
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NFPROTO_ARP = 3, |
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NFPROTO_BRIDGE = 7, |
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NFPROTO_IPV6 = 10, |
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NFPROTO_DECNET = 12, |
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NFPROTO_NUMPROTO, |
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}; |
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union nf_inet_addr { |
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__u32 all[4]; |
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__be32 ip; |
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__be32 ip6[4]; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct in_addr in; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct in6_addr in6; |
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}; |
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#ifdef __KERNEL__ |
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#ifdef CONFIG_NETFILTER |
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static inline int nf_inet_addr_cmp(const union nf_inet_addr *a1, |
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const union nf_inet_addr *a2) |
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{ |
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return a1->all[0] == a2->all[0] && |
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a1->all[1] == a2->all[1] && |
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a1->all[2] == a2->all[2] && |
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a1->all[3] == a2->all[3]; |
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} |
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extern void netfilter_init(void); |
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/* Largest hook number + 1 */ |
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#define NF_MAX_HOOKS 8 |
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struct sk_buff; |
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typedef unsigned int nf_hookfn(unsigned int hooknum, |
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struct sk_buff *skb, |
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const struct net_device *in, |
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const struct net_device *out, |
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int (*okfn)(struct sk_buff *)); |
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struct nf_hook_ops |
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{ |
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struct list_head list; |
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|
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/* User fills in from here down. */ |
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nf_hookfn *hook; |
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struct module *owner; |
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u_int8_t pf; |
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unsigned int hooknum; |
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/* Hooks are ordered in ascending priority. */ |
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int priority; |
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}; |
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struct nf_sockopt_ops |
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{ |
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struct list_head list; |
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u_int8_t pf; |
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/* Non-inclusive ranges: use 0/0/NULL to never get called. */ |
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int set_optmin; |
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int set_optmax; |
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int (*set)(struct sock *sk, int optval, void __user *user, unsigned int len); |
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int (*compat_set)(struct sock *sk, int optval, |
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void __user *user, unsigned int len); |
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|
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int get_optmin; |
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int get_optmax; |
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int (*get)(struct sock *sk, int optval, void __user *user, int *len); |
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int (*compat_get)(struct sock *sk, int optval, |
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void __user *user, int *len); |
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|
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/* Use the module struct to lock set/get code in place */ |
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struct module *owner; |
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}; |
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|
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/* Function to register/unregister hook points. */ |
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int nf_register_hook(struct nf_hook_ops *reg); |
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void nf_unregister_hook(struct nf_hook_ops *reg); |
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int nf_register_hooks(struct nf_hook_ops *reg, unsigned int n); |
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void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n); |
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|
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/* Functions to register get/setsockopt ranges (non-inclusive). You |
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need to check permissions yourself! */ |
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int nf_register_sockopt(struct nf_sockopt_ops *reg); |
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void nf_unregister_sockopt(struct nf_sockopt_ops *reg); |
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|
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#ifdef CONFIG_SYSCTL |
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/* Sysctl registration */ |
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extern struct ctl_path nf_net_netfilter_sysctl_path[]; |
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extern struct ctl_path nf_net_ipv4_netfilter_sysctl_path[]; |
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#endif /* CONFIG_SYSCTL */ |
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extern struct list_head nf_hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS]; |
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int nf_hook_slow(u_int8_t pf, unsigned int hook, struct sk_buff *skb, |
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struct net_device *indev, struct net_device *outdev, |
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int (*okfn)(struct sk_buff *), int thresh); |
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|
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/** |
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* nf_hook_thresh - call a netfilter hook |
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* |
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* Returns 1 if the hook has allowed the packet to pass. The function |
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* okfn must be invoked by the caller in this case. Any other return |
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* value indicates the packet has been consumed by the hook. |
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*/ |
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static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook, |
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struct sk_buff *skb, |
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struct net_device *indev, |
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struct net_device *outdev, |
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int (*okfn)(struct sk_buff *), int thresh, |
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int cond) |
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{ |
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if (!cond) |
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return 1; |
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#ifndef CONFIG_NETFILTER_DEBUG |
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if (list_empty(&nf_hooks[pf][hook])) |
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return 1; |
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#endif |
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return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh); |
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176 |
} |
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static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb, |
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struct net_device *indev, struct net_device *outdev, |
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int (*okfn)(struct sk_buff *)) |
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181 |
{ |
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return nf_hook_thresh(pf, hook, skb, indev, outdev, okfn, INT_MIN, 1); |
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183 |
} |
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184 |
|
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/* Activate hook; either okfn or kfree_skb called, unless a hook |
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returns NF_STOLEN (in which case, it's up to the hook to deal with |
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187 |
the consequences). |
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188 |
|
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189 |
Returns -ERRNO if packet dropped. Zero means queued, stolen or |
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190 |
accepted. |
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191 |
*/ |
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193 |
/* RR: |
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194 |
> I don't want nf_hook to return anything because people might forget |
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> about async and trust the return value to mean "packet was ok". |
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196 |
|
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197 |
AK: |
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198 |
Just document it clearly, then you can expect some sense from kernel |
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199 |
coders :) |
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200 |
*/ |
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201 |
|
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202 |
/* This is gross, but inline doesn't cut it for avoiding the function |
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call in fast path: gcc doesn't inline (needs value tracking?). --RR */ |
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204 |
|
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205 |
/* HX: It's slightly less gross now. */ |
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206 |
|
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207 |
#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \ |
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208 |
({int __ret; \ |
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if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, thresh, 1)) == 1)\ |
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__ret = (okfn)(skb); \ |
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211 |
__ret;}) |
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212 |
|
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#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) \ |
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({int __ret; \ |
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if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, INT_MIN, cond)) == 1)\ |
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__ret = (okfn)(skb); \ |
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__ret;}) |
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|
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#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \ |
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NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, INT_MIN) |
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221 |
|
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/* Call setsockopt() */ |
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223 |
int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt, |
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224 |
int len); |
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225 |
int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt, |
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int *len); |
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|
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int compat_nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, |
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char __user *opt, int len); |
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int compat_nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, |
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char __user *opt, int *len); |
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|
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/* Call this before modifying an existing packet: ensures it is |
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modifiable and linear to the point you care about (writable_len). |
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Returns true or false. */ |
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extern int skb_make_writable(struct sk_buff *skb, unsigned int writable_len); |
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|
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struct flowi; |
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struct nf_queue_entry; |
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|
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struct nf_afinfo { |
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unsigned short family; |
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__sum16 (*checksum)(struct sk_buff *skb, unsigned int hook, |
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unsigned int dataoff, u_int8_t protocol); |
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__sum16 (*checksum_partial)(struct sk_buff *skb, |
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unsigned int hook, |
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unsigned int dataoff, |
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unsigned int len, |
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u_int8_t protocol); |
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int (*route)(struct dst_entry **dst, struct flowi *fl); |
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void (*saveroute)(const struct sk_buff *skb, |
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struct nf_queue_entry *entry); |
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int (*reroute)(struct sk_buff *skb, |
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const struct nf_queue_entry *entry); |
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int route_key_size; |
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}; |
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|
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extern const struct nf_afinfo *nf_afinfo[NFPROTO_NUMPROTO]; |
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static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family) |
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{ |
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return rcu_dereference(nf_afinfo[family]); |
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} |
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263 |
|
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static inline __sum16 |
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nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff, |
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u_int8_t protocol, unsigned short family) |
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{ |
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const struct nf_afinfo *afinfo; |
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__sum16 csum = 0; |
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270 |
|
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rcu_read_lock(); |
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afinfo = nf_get_afinfo(family); |
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if (afinfo) |
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csum = afinfo->checksum(skb, hook, dataoff, protocol); |
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rcu_read_unlock(); |
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return csum; |
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277 |
} |
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278 |
|
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static inline __sum16 |
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nf_checksum_partial(struct sk_buff *skb, unsigned int hook, |
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281 |
unsigned int dataoff, unsigned int len, |
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u_int8_t protocol, unsigned short family) |
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283 |
{ |
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284 |
const struct nf_afinfo *afinfo; |
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__sum16 csum = 0; |
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286 |
|
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rcu_read_lock(); |
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288 |
afinfo = nf_get_afinfo(family); |
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289 |
if (afinfo) |
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csum = afinfo->checksum_partial(skb, hook, dataoff, len, |
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291 |
protocol); |
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rcu_read_unlock(); |
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293 |
return csum; |
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294 |
} |
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295 |
|
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296 |
extern int nf_register_afinfo(const struct nf_afinfo *afinfo); |
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extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo); |
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298 |
|
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299 |
#include <net/flow.h> |
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extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *); |
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301 |
|
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302 |
static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
303 |
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
304 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
305 |
#ifdef CONFIG_NF_NAT_NEEDED |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
306 |
void (*decodefn)(struct sk_buff *, struct flowi *); |
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|
307 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
308 |
if (family == AF_INET) { |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
309 |
rcu_read_lock(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
310 |
decodefn = rcu_dereference(ip_nat_decode_session); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
311 |
if (decodefn) |
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312 |
decodefn(skb, fl); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
313 |
rcu_read_unlock(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
314 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
315 |
#endif |
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|
316 |
} |
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|
317 |
|
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318 |
#ifdef CONFIG_PROC_FS |
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|
319 |
#include <linux/proc_fs.h> |
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|
320 |
extern struct proc_dir_entry *proc_net_netfilter; |
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|
321 |
#endif |
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|
322 |
|
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|
323 |
#else /* !CONFIG_NETFILTER */ |
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|
324 |
#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb) |
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|
325 |
#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) (okfn)(skb) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
326 |
static inline int nf_hook_thresh(u_int8_t pf, unsigned int hook, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
327 |
struct sk_buff *skb, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
328 |
struct net_device *indev, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
329 |
struct net_device *outdev, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
330 |
int (*okfn)(struct sk_buff *), int thresh, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
331 |
int cond) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
332 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
333 |
return okfn(skb); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
334 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
335 |
static inline int nf_hook(u_int8_t pf, unsigned int hook, struct sk_buff *skb, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
336 |
struct net_device *indev, struct net_device *outdev, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
337 |
int (*okfn)(struct sk_buff *)) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
338 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
339 |
return 1; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
340 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
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struct flowi; |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family) |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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345 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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346 |
#endif /*CONFIG_NETFILTER*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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347 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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349 |
extern void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *); |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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350 |
extern void nf_ct_attach(struct sk_buff *, struct sk_buff *); |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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351 |
extern void (*nf_ct_destroy)(struct nf_conntrack *); |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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352 |
#else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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353 |
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {} |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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354 |
#endif |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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355 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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356 |
#endif /*__KERNEL__*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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357 |
#endif /*__LINUX_NETFILTER_H*/ |