1#ifndef _CCID_H
2#define _CCID_H
3
4
5
6
7
8
9
10
11
12
13
14
15
16#include <net/sock.h>
17#include <linux/compiler.h>
18#include <linux/dccp.h>
19#include <linux/list.h>
20#include <linux/module.h>
21
22#define CCID_MAX 255
23
24struct tcp_info;
25
26struct ccid_operations {
27 unsigned char ccid_id;
28 const char *ccid_name;
29 struct module *ccid_owner;
30 struct kmem_cache *ccid_hc_rx_slab;
31 __u32 ccid_hc_rx_obj_size;
32 struct kmem_cache *ccid_hc_tx_slab;
33 __u32 ccid_hc_tx_obj_size;
34 int (*ccid_hc_rx_init)(struct ccid *ccid, struct sock *sk);
35 int (*ccid_hc_tx_init)(struct ccid *ccid, struct sock *sk);
36 void (*ccid_hc_rx_exit)(struct sock *sk);
37 void (*ccid_hc_tx_exit)(struct sock *sk);
38 void (*ccid_hc_rx_packet_recv)(struct sock *sk,
39 struct sk_buff *skb);
40 int (*ccid_hc_rx_parse_options)(struct sock *sk,
41 unsigned char option,
42 unsigned char len, u16 idx,
43 unsigned char* value);
44 int (*ccid_hc_rx_insert_options)(struct sock *sk,
45 struct sk_buff *skb);
46 void (*ccid_hc_tx_packet_recv)(struct sock *sk,
47 struct sk_buff *skb);
48 int (*ccid_hc_tx_parse_options)(struct sock *sk,
49 unsigned char option,
50 unsigned char len, u16 idx,
51 unsigned char* value);
52 int (*ccid_hc_tx_send_packet)(struct sock *sk,
53 struct sk_buff *skb);
54 void (*ccid_hc_tx_packet_sent)(struct sock *sk,
55 int more, unsigned int len);
56 void (*ccid_hc_rx_get_info)(struct sock *sk,
57 struct tcp_info *info);
58 void (*ccid_hc_tx_get_info)(struct sock *sk,
59 struct tcp_info *info);
60 int (*ccid_hc_rx_getsockopt)(struct sock *sk,
61 const int optname, int len,
62 u32 __user *optval,
63 int __user *optlen);
64 int (*ccid_hc_tx_getsockopt)(struct sock *sk,
65 const int optname, int len,
66 u32 __user *optval,
67 int __user *optlen);
68};
69
70extern int ccid_register(struct ccid_operations *ccid_ops);
71extern int ccid_unregister(struct ccid_operations *ccid_ops);
72
73struct ccid {
74 struct ccid_operations *ccid_ops;
75 char ccid_priv[0];
76};
77
78static inline void *ccid_priv(const struct ccid *ccid)
79{
80 return (void *)ccid->ccid_priv;
81}
82
83extern struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx,
84 gfp_t gfp);
85
86extern struct ccid *ccid_hc_rx_new(unsigned char id, struct sock *sk,
87 gfp_t gfp);
88extern struct ccid *ccid_hc_tx_new(unsigned char id, struct sock *sk,
89 gfp_t gfp);
90
91extern void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
92extern void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);
93
94static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
95 struct sk_buff *skb)
96{
97 int rc = 0;
98 if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
99 rc = ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb);
100 return rc;
101}
102
103static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
104 int more, unsigned int len)
105{
106 if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
107 ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, more, len);
108}
109
110static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
111 struct sk_buff *skb)
112{
113 if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
114 ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
115}
116
117static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
118 struct sk_buff *skb)
119{
120 if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
121 ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
122}
123
124static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
125 unsigned char option,
126 unsigned char len, u16 idx,
127 unsigned char* value)
128{
129 int rc = 0;
130 if (ccid->ccid_ops->ccid_hc_tx_parse_options != NULL)
131 rc = ccid->ccid_ops->ccid_hc_tx_parse_options(sk, option, len, idx,
132 value);
133 return rc;
134}
135
136static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
137 unsigned char option,
138 unsigned char len, u16 idx,
139 unsigned char* value)
140{
141 int rc = 0;
142 if (ccid->ccid_ops->ccid_hc_rx_parse_options != NULL)
143 rc = ccid->ccid_ops->ccid_hc_rx_parse_options(sk, option, len, idx, value);
144 return rc;
145}
146
147static inline int ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
148 struct sk_buff *skb)
149{
150 if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
151 return ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
152 return 0;
153}
154
155static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
156 struct tcp_info *info)
157{
158 if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
159 ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
160}
161
162static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
163 struct tcp_info *info)
164{
165 if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
166 ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
167}
168
169static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
170 const int optname, int len,
171 u32 __user *optval, int __user *optlen)
172{
173 int rc = -ENOPROTOOPT;
174 if (ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
175 rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
176 optval, optlen);
177 return rc;
178}
179
180static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
181 const int optname, int len,
182 u32 __user *optval, int __user *optlen)
183{
184 int rc = -ENOPROTOOPT;
185 if (ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
186 rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
187 optval, optlen);
188 return rc;
189}
190#endif
191
