author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 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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/* |
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* Header for use in defining a given L4 protocol for connection tracking. |
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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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* 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
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* - generalized L3 protocol dependent part. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* Derived from include/linux/netfiter_ipv4/ip_conntrack_protcol.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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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _NF_CONNTRACK_L4PROTO_H |
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#define _NF_CONNTRACK_L4PROTO_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/netlink.h> |
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#include <net/netlink.h> |
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#include <net/netfilter/nf_conntrack.h> |
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struct seq_file; |
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struct nf_conntrack_l4proto |
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{ |
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/* L3 Protocol number. */ |
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u_int16_t l3proto; |
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/* L4 Protocol number. */ |
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u_int8_t l4proto; |
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/* Try to fill in the third arg: dataoff is offset past network protocol |
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hdr. Return true if possible. */ |
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bool (*pkt_to_tuple)(const struct sk_buff *skb, unsigned int dataoff, |
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struct nf_conntrack_tuple *tuple); |
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/* Invert the per-proto part of the tuple: ie. turn xmit into reply. |
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* Some packets can't be inverted: return 0 in that case. |
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*/ |
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bool (*invert_tuple)(struct nf_conntrack_tuple *inverse, |
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const struct nf_conntrack_tuple *orig); |
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/* Returns verdict for packet, or -1 for invalid. */ |
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int (*packet)(struct nf_conn *ct, |
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const struct sk_buff *skb, |
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unsigned int dataoff, |
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enum ip_conntrack_info ctinfo, |
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u_int8_t pf, |
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unsigned int hooknum); |
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/* Called when a new connection for this protocol found; |
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* returns TRUE if it's OK. If so, packet() called next. */ |
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bool (*new)(struct nf_conn *ct, const struct sk_buff *skb, |
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unsigned int dataoff); |
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/* Called when a conntrack entry is destroyed */ |
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void (*destroy)(struct nf_conn *ct); |
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int (*error)(struct net *net, struct sk_buff *skb, unsigned int dataoff, |
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enum ip_conntrack_info *ctinfo, |
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u_int8_t pf, unsigned int hooknum); |
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/* Print out the per-protocol part of the tuple. Return like seq_* */ |
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int (*print_tuple)(struct seq_file *s, |
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const struct nf_conntrack_tuple *); |
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/* Print out the private part of the conntrack. */ |
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int (*print_conntrack)(struct seq_file *s, const struct nf_conn *); |
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/* convert protoinfo to nfnetink attributes */ |
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int (*to_nlattr)(struct sk_buff *skb, struct nlattr *nla, |
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const struct nf_conn *ct); |
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/* convert nfnetlink attributes to protoinfo */ |
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int (*from_nlattr)(struct nlattr *tb[], struct nf_conn *ct); |
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int (*tuple_to_nlattr)(struct sk_buff *skb, |
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const struct nf_conntrack_tuple *t); |
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int (*nlattr_to_tuple)(struct nlattr *tb[], |
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struct nf_conntrack_tuple *t); |
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const struct nla_policy *nla_policy; |
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#ifdef CONFIG_SYSCTL |
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struct ctl_table_header **ctl_table_header; |
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struct ctl_table *ctl_table; |
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unsigned int *ctl_table_users; |
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#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT |
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struct ctl_table_header *ctl_compat_table_header; |
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struct ctl_table *ctl_compat_table; |
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#endif |
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#endif |
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/* Protocol name */ |
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const char *name; |
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/* Module (if any) which this is connected to. */ |
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struct module *me; |
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}; |
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/* Existing built-in protocols */ |
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extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6; |
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extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4; |
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extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6; |
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extern struct nf_conntrack_l4proto nf_conntrack_l4proto_generic; |
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#define MAX_NF_CT_PROTO 256 |
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extern struct nf_conntrack_l4proto * |
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__nf_ct_l4proto_find(u_int16_t l3proto, u_int8_t l4proto); |
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extern struct nf_conntrack_l4proto * |
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nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t protocol); |
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extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p); |
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/* Protocol registration. */ |
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extern int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *proto); |
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extern void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *proto); |
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|
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/* Generic netlink helpers */ |
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extern int nf_ct_port_tuple_to_nlattr(struct sk_buff *skb, |
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const struct nf_conntrack_tuple *tuple); |
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extern int nf_ct_port_nlattr_to_tuple(struct nlattr *tb[], |
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struct nf_conntrack_tuple *t); |
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extern const struct nla_policy nf_ct_port_nla_policy[]; |
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#ifdef CONFIG_SYSCTL |
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#ifdef DEBUG_INVALID_PACKETS |
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#define LOG_INVALID(net, proto) \ |
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((net)->ct.sysctl_log_invalid == (proto) || \ |
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(net)->ct.sysctl_log_invalid == IPPROTO_RAW) |
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#else |
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#define LOG_INVALID(net, proto) \ |
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(((net)->ct.sysctl_log_invalid == (proto) || \ |
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(net)->ct.sysctl_log_invalid == IPPROTO_RAW) \ |
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&& net_ratelimit()) |
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#endif |
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#else |
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static inline int LOG_INVALID(struct net *net, int proto) { return 0; } |
0
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#endif /* CONFIG_SYSCTL */ |
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|
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#endif /*_NF_CONNTRACK_PROTOCOL_H*/ |