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1 /*
2  * netlink/netfilter/exp.h   Conntrack Expectation
3  *
4  *  This library is free software; you can redistribute it and/or
5  *  modify it under the terms of the GNU Lesser General Public
6  *  License as published by the Free Software Foundation version 2.1
7  *  of the License.
8  *
9  * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
10  * Copyright (c) 2007 Philip Craig <philipc@snapgear.com>
11  * Copyright (c) 2007 Secure Computing Corporation
12  * Copyright (c) 2012 Rich Fought <rich.fought@watchguard.com>
13  */
14 
15 #ifndef NETLINK_EXP_H_
16 #define NETLINK_EXP_H_
17 
18 #include <netlink/netlink.h>
19 #include <netlink/addr.h>
20 #include <netlink/cache.h>
21 #include <netlink/msg.h>
22 
23 #include <linux/version.h>
24 
25 #ifdef __cplusplus
26 extern "C" {
27 #endif
28 
29 struct nfnl_exp;
30 
31 enum nfnl_exp_tuples {
32 	NFNL_EXP_TUPLE_EXPECT,
33 	NFNL_EXP_TUPLE_MASTER,
34 	NFNL_EXP_TUPLE_MASK,
35 	NFNL_EXP_TUPLE_NAT,
36 	NFNL_EXP_TUPLE_MAX
37 };
38 
39 extern struct nl_object_ops exp_obj_ops;
40 
41 extern struct nfnl_exp * nfnl_exp_alloc(void);
42 extern int  nfnl_exp_alloc_cache(struct nl_sock *, struct nl_cache **);
43 
44 extern int  nfnlmsg_exp_group(struct nlmsghdr *);
45 extern int  nfnlmsg_exp_parse(struct nlmsghdr *, struct nfnl_exp **);
46 
47 extern void nfnl_exp_get(struct nfnl_exp *);
48 extern void nfnl_exp_put(struct nfnl_exp *);
49 
50 extern int  nfnl_exp_dump_request(struct nl_sock *);
51 
52 extern int  nfnl_exp_build_add_request(const struct nfnl_exp *, int,
53 						struct nl_msg **);
54 extern int  nfnl_exp_add(struct nl_sock *, const struct nfnl_exp *, int);
55 
56 extern int  nfnl_exp_build_delete_request(const struct nfnl_exp *, int,
57 						struct nl_msg **);
58 extern int  nfnl_exp_del(struct nl_sock *, const struct nfnl_exp *, int);
59 
60 extern int  nfnl_exp_build_query_request(const struct nfnl_exp *, int,
61 						struct nl_msg **);
62 extern int  nfnl_exp_query(struct nl_sock *, const struct nfnl_exp *, int);
63 
64 extern void nfnl_exp_set_family(struct nfnl_exp *, uint8_t);
65 extern uint8_t  nfnl_exp_get_family(const struct nfnl_exp *);
66 
67 extern void nfnl_exp_set_timeout(struct nfnl_exp *, uint32_t);
68 extern int  nfnl_exp_test_timeout(const struct nfnl_exp *);
69 extern uint32_t nfnl_exp_get_timeout(const struct nfnl_exp *);
70 
71 extern void nfnl_exp_set_id(struct nfnl_exp *, uint32_t);
72 extern int  nfnl_exp_test_id(const struct nfnl_exp *);
73 extern uint32_t nfnl_exp_get_id(const struct nfnl_exp *);
74 
75 extern int  nfnl_exp_set_helper_name(struct nfnl_exp *, void *);
76 extern int  nfnl_exp_test_helper_name(const struct nfnl_exp *);
77 extern const char * nfnl_exp_get_helper_name(const struct nfnl_exp *);
78 
79 extern void nfnl_exp_set_zone(struct nfnl_exp *, uint16_t);
80 extern int  nfnl_exp_test_zone(const struct nfnl_exp *);
81 extern uint16_t nfnl_exp_get_zone(const struct nfnl_exp *);
82 
83 extern void nfnl_exp_set_flags(struct nfnl_exp *, uint32_t);
84 extern int  nfnl_exp_test_flags(const struct nfnl_exp *);
85 extern uint32_t nfnl_exp_get_flags(const struct nfnl_exp *);
86 
87 extern void nfnl_exp_set_class(struct nfnl_exp *, uint32_t);
88 extern int  nfnl_exp_test_class(const struct nfnl_exp *);
89 extern uint32_t nfnl_exp_get_class(const struct nfnl_exp *);
90 
91 extern int  nfnl_exp_set_fn(struct nfnl_exp *, void *);
92 extern int  nfnl_exp_test_fn(const struct nfnl_exp *);
93 extern const char * nfnl_exp_get_fn(const struct nfnl_exp *);
94 
95 extern void nfnl_exp_set_nat_dir(struct nfnl_exp *, uint8_t);
96 extern int  nfnl_exp_test_nat_dir(const struct nfnl_exp *);
97 extern uint8_t nfnl_exp_get_nat_dir(const struct nfnl_exp *);
98 
99 // The int argument specifies which nfnl_exp_dir (expect, master, mask or nat)
100 // Expectation objects only use orig, not reply
101 
102 extern int  nfnl_exp_set_src(struct nfnl_exp *, int, struct nl_addr *);
103 extern int  nfnl_exp_test_src(const struct nfnl_exp *, int);
104 extern struct nl_addr * nfnl_exp_get_src(const struct nfnl_exp *, int);
105 
106 extern int  nfnl_exp_set_dst(struct nfnl_exp *, int, struct nl_addr *);
107 extern int  nfnl_exp_test_dst(const struct nfnl_exp *, int);
108 extern struct nl_addr * nfnl_exp_get_dst(const struct nfnl_exp *, int);
109 
110 extern void  nfnl_exp_set_l4protonum(struct nfnl_exp *, int, uint8_t);
111 extern int  nfnl_exp_test_l4protonum(const struct nfnl_exp *, int);
112 extern uint8_t nfnl_exp_get_l4protonum(const struct nfnl_exp *, int);
113 
114 extern void nfnl_exp_set_ports(struct nfnl_exp *, int, uint16_t, uint16_t);
115 extern int nfnl_exp_test_ports(const struct nfnl_exp *, int);
116 extern uint16_t nfnl_exp_get_src_port(const struct nfnl_exp *, int);
117 extern uint16_t nfnl_exp_get_dst_port(const struct nfnl_exp *, int);
118 
119 extern void nfnl_exp_set_icmp(struct nfnl_exp *, int, uint16_t, uint8_t, uint8_t);
120 extern int nfnl_exp_test_icmp(const struct nfnl_exp *, int);
121 extern uint16_t nfnl_exp_get_icmp_id(const struct nfnl_exp *, int);
122 extern uint8_t  nfnl_exp_get_icmp_type(const struct nfnl_exp *, int);
123 extern uint8_t  nfnl_exp_get_icmp_code(const struct nfnl_exp *, int);
124 
125 #ifdef __cplusplus
126 }
127 #endif
128 
129 #endif
130