xref: /openbmc/linux/net/dccp/ccid.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 #ifndef _CCID_H
2 #define _CCID_H
3 /*
4  *  net/dccp/ccid.h
5  *
6  *  An implementation of the DCCP protocol
7  *  Arnaldo Carvalho de Melo <acme@conectiva.com.br>
8  *
9  *  CCID infrastructure
10  *
11  *	This program is free software; you can redistribute it and/or modify it
12  *	under the terms of the GNU General Public License version 2 as
13  *	published by the Free Software Foundation.
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 
24 struct ccid {
25 	unsigned char	ccid_id;
26 	const char	*ccid_name;
27 	struct module	*ccid_owner;
28 	int		(*ccid_init)(struct sock *sk);
29 	void		(*ccid_exit)(struct sock *sk);
30 	int		(*ccid_hc_rx_init)(struct sock *sk);
31 	int		(*ccid_hc_tx_init)(struct sock *sk);
32 	void		(*ccid_hc_rx_exit)(struct sock *sk);
33 	void		(*ccid_hc_tx_exit)(struct sock *sk);
34 	void		(*ccid_hc_rx_packet_recv)(struct sock *sk,
35 						  struct sk_buff *skb);
36 	int		(*ccid_hc_rx_parse_options)(struct sock *sk,
37 						    unsigned char option,
38 						    unsigned char len, u16 idx,
39 						    unsigned char* value);
40 	void		(*ccid_hc_rx_insert_options)(struct sock *sk,
41 						     struct sk_buff *skb);
42 	void		(*ccid_hc_tx_insert_options)(struct sock *sk,
43 						     struct sk_buff *skb);
44 	void		(*ccid_hc_tx_packet_recv)(struct sock *sk,
45 						  struct sk_buff *skb);
46 	int		(*ccid_hc_tx_parse_options)(struct sock *sk,
47 						    unsigned char option,
48 						    unsigned char len, u16 idx,
49 						    unsigned char* value);
50 	int		(*ccid_hc_tx_send_packet)(struct sock *sk,
51 						  struct sk_buff *skb, int len);
52 	void		(*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
53 						  int len);
54 	void		(*ccid_hc_rx_get_info)(struct sock *sk,
55 					       struct tcp_info *info);
56 	void		(*ccid_hc_tx_get_info)(struct sock *sk,
57 					       struct tcp_info *info);
58 	int		(*ccid_hc_rx_getsockopt)(struct sock *sk,
59 						 const int optname, int len,
60 						 u32 __user *optval,
61 						 int __user *optlen);
62 	int		(*ccid_hc_tx_getsockopt)(struct sock *sk,
63 						 const int optname, int len,
64 						 u32 __user *optval,
65 						 int __user *optlen);
66 };
67 
68 extern int	   ccid_register(struct ccid *ccid);
69 extern int	   ccid_unregister(struct ccid *ccid);
70 
71 extern struct ccid *ccid_init(unsigned char id, struct sock *sk);
72 extern void	   ccid_exit(struct ccid *ccid, struct sock *sk);
73 
74 static inline void __ccid_get(struct ccid *ccid)
75 {
76 	__module_get(ccid->ccid_owner);
77 }
78 
79 static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
80 					 struct sk_buff *skb, int len)
81 {
82 	int rc = 0;
83 	if (ccid->ccid_hc_tx_send_packet != NULL)
84 		rc = ccid->ccid_hc_tx_send_packet(sk, skb, len);
85 	return rc;
86 }
87 
88 static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
89 					  int more, int len)
90 {
91 	if (ccid->ccid_hc_tx_packet_sent != NULL)
92 		ccid->ccid_hc_tx_packet_sent(sk, more, len);
93 }
94 
95 static inline int ccid_hc_rx_init(struct ccid *ccid, struct sock *sk)
96 {
97 	int rc = 0;
98 	if (ccid->ccid_hc_rx_init != NULL)
99 		rc = ccid->ccid_hc_rx_init(sk);
100 	return rc;
101 }
102 
103 static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
104 {
105 	int rc = 0;
106 	if (ccid->ccid_hc_tx_init != NULL)
107 		rc = ccid->ccid_hc_tx_init(sk);
108 	return rc;
109 }
110 
111 static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
112 {
113 	if (ccid != NULL && ccid->ccid_hc_rx_exit != NULL &&
114 	    dccp_sk(sk)->dccps_hc_rx_ccid_private != NULL)
115 		ccid->ccid_hc_rx_exit(sk);
116 }
117 
118 static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
119 {
120 	if (ccid != NULL && ccid->ccid_hc_tx_exit != NULL &&
121 	    dccp_sk(sk)->dccps_hc_tx_ccid_private != NULL)
122 		ccid->ccid_hc_tx_exit(sk);
123 }
124 
125 static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
126 					  struct sk_buff *skb)
127 {
128 	if (ccid->ccid_hc_rx_packet_recv != NULL)
129 		ccid->ccid_hc_rx_packet_recv(sk, skb);
130 }
131 
132 static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
133 					  struct sk_buff *skb)
134 {
135 	if (ccid->ccid_hc_tx_packet_recv != NULL)
136 		ccid->ccid_hc_tx_packet_recv(sk, skb);
137 }
138 
139 static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
140 					   unsigned char option,
141 					   unsigned char len, u16 idx,
142 					   unsigned char* value)
143 {
144 	int rc = 0;
145 	if (ccid->ccid_hc_tx_parse_options != NULL)
146 		rc = ccid->ccid_hc_tx_parse_options(sk, option, len, idx,
147 						    value);
148 	return rc;
149 }
150 
151 static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
152 					   unsigned char option,
153 					   unsigned char len, u16 idx,
154 					   unsigned char* value)
155 {
156 	int rc = 0;
157 	if (ccid->ccid_hc_rx_parse_options != NULL)
158 		rc = ccid->ccid_hc_rx_parse_options(sk, option, len, idx, value);
159 	return rc;
160 }
161 
162 static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
163 					     struct sk_buff *skb)
164 {
165 	if (ccid->ccid_hc_tx_insert_options != NULL)
166 		ccid->ccid_hc_tx_insert_options(sk, skb);
167 }
168 
169 static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
170 					     struct sk_buff *skb)
171 {
172 	if (ccid->ccid_hc_rx_insert_options != NULL)
173 		ccid->ccid_hc_rx_insert_options(sk, skb);
174 }
175 
176 static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
177 				       struct tcp_info *info)
178 {
179 	if (ccid->ccid_hc_rx_get_info != NULL)
180 		ccid->ccid_hc_rx_get_info(sk, info);
181 }
182 
183 static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
184 				       struct tcp_info *info)
185 {
186 	if (ccid->ccid_hc_tx_get_info != NULL)
187 		ccid->ccid_hc_tx_get_info(sk, info);
188 }
189 
190 static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
191 					const int optname, int len,
192 					u32 __user *optval, int __user *optlen)
193 {
194 	int rc = -ENOPROTOOPT;
195 	if (ccid->ccid_hc_rx_getsockopt != NULL)
196 		rc = ccid->ccid_hc_rx_getsockopt(sk, optname, len,
197 						 optval, optlen);
198 	return rc;
199 }
200 
201 static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
202 					const int optname, int len,
203 					u32 __user *optval, int __user *optlen)
204 {
205 	int rc = -ENOPROTOOPT;
206 	if (ccid->ccid_hc_tx_getsockopt != NULL)
207 		rc = ccid->ccid_hc_tx_getsockopt(sk, optname, len,
208 						 optval, optlen);
209 	return rc;
210 }
211 #endif /* _CCID_H */
212