*/
#include <net/sock.h>
+#include <linux/compiler.h>
#include <linux/dccp.h>
#include <linux/list.h>
#include <linux/module.h>
#define CCID_MAX 255
-struct ccid {
- unsigned char ccid_id;
- const char *ccid_name;
- struct module *ccid_owner;
- int (*ccid_init)(struct sock *sk);
- void (*ccid_exit)(struct sock *sk);
- int (*ccid_hc_rx_init)(struct sock *sk);
- int (*ccid_hc_tx_init)(struct sock *sk);
+struct tcp_info;
+
+/**
+ * struct ccid_operations - Interface to Congestion-Control Infrastructure
+ *
+ * @ccid_id: numerical CCID ID (up to %CCID_MAX, cf. table 5 in RFC 4340, 10.)
+ * @ccid_ccmps: the CCMPS including network/transport headers (0 when disabled)
+ * @ccid_name: alphabetical identifier string for @ccid_id
+ * @ccid_hc_{r,t}x_slab: memory pool for the receiver/sender half-connection
+ * @ccid_hc_{r,t}x_obj_size: size of the receiver/sender half-connection socket
+ *
+ * @ccid_hc_{r,t}x_init: CCID-specific initialisation routine (before startup)
+ * @ccid_hc_{r,t}x_exit: CCID-specific cleanup routine (before destruction)
+ * @ccid_hc_rx_packet_recv: implements the HC-receiver side
+ * @ccid_hc_{r,t}x_parse_options: parsing routine for CCID/HC-specific options
+ * @ccid_hc_{r,t}x_insert_options: insert routine for CCID/HC-specific options
+ * @ccid_hc_tx_packet_recv: implements feedback processing for the HC-sender
+ * @ccid_hc_tx_send_packet: implements the sending part of the HC-sender
+ * @ccid_hc_tx_packet_sent: does accounting for packets in flight by HC-sender
+ * @ccid_hc_{r,t}x_get_info: INET_DIAG information for HC-receiver/sender
+ * @ccid_hc_{r,t}x_getsockopt: socket options specific to HC-receiver/sender
+ */
+struct ccid_operations {
+ unsigned char ccid_id;
+ __u32 ccid_ccmps;
+ const char *ccid_name;
+ struct kmem_cache *ccid_hc_rx_slab,
+ *ccid_hc_tx_slab;
+ __u32 ccid_hc_rx_obj_size,
+ ccid_hc_tx_obj_size;
+ /* Interface Routines */
+ int (*ccid_hc_rx_init)(struct ccid *ccid, struct sock *sk);
+ int (*ccid_hc_tx_init)(struct ccid *ccid, struct sock *sk);
void (*ccid_hc_rx_exit)(struct sock *sk);
void (*ccid_hc_tx_exit)(struct sock *sk);
void (*ccid_hc_rx_packet_recv)(struct sock *sk,
unsigned char option,
unsigned char len, u16 idx,
unsigned char* value);
- void (*ccid_hc_rx_insert_options)(struct sock *sk,
- struct sk_buff *skb);
- void (*ccid_hc_tx_insert_options)(struct sock *sk,
+ int (*ccid_hc_rx_insert_options)(struct sock *sk,
struct sk_buff *skb);
void (*ccid_hc_tx_packet_recv)(struct sock *sk,
struct sk_buff *skb);
unsigned char len, u16 idx,
unsigned char* value);
int (*ccid_hc_tx_send_packet)(struct sock *sk,
- struct sk_buff *skb, int len);
- void (*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
- int len);
+ struct sk_buff *skb);
+ void (*ccid_hc_tx_packet_sent)(struct sock *sk,
+ int more, unsigned int len);
+ void (*ccid_hc_rx_get_info)(struct sock *sk,
+ struct tcp_info *info);
+ void (*ccid_hc_tx_get_info)(struct sock *sk,
+ struct tcp_info *info);
+ int (*ccid_hc_rx_getsockopt)(struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval,
+ int __user *optlen);
+ int (*ccid_hc_tx_getsockopt)(struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval,
+ int __user *optlen);
};
-extern int ccid_register(struct ccid *ccid);
-extern int ccid_unregister(struct ccid *ccid);
+extern struct ccid_operations ccid2_ops;
+#ifdef CONFIG_IP_DCCP_CCID3
+extern struct ccid_operations ccid3_ops;
+#endif
-extern struct ccid *ccid_init(unsigned char id, struct sock *sk);
-extern void ccid_exit(struct ccid *ccid, struct sock *sk);
+extern int ccid_initialize_builtins(void);
+extern void ccid_cleanup_builtins(void);
-static inline void __ccid_get(struct ccid *ccid)
-{
- __module_get(ccid->ccid_owner);
-}
+struct ccid {
+ struct ccid_operations *ccid_ops;
+ char ccid_priv[0];
+};
-static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
- struct sk_buff *skb, int len)
+static inline void *ccid_priv(const struct ccid *ccid)
{
- int rc = 0;
- if (ccid->ccid_hc_tx_send_packet != NULL)
- rc = ccid->ccid_hc_tx_send_packet(sk, skb, len);
- return rc;
+ return (void *)ccid->ccid_priv;
}
-static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
- int more, int len)
+extern bool ccid_support_check(u8 const *ccid_array, u8 array_len);
+extern int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
+extern int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
+ char __user *, int __user *);
+
+extern struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);
+
+static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
{
- if (ccid->ccid_hc_tx_packet_sent != NULL)
- ccid->ccid_hc_tx_packet_sent(sk, more, len);
+ struct ccid *ccid = dp->dccps_hc_rx_ccid;
+
+ if (ccid == NULL || ccid->ccid_ops == NULL)
+ return -1;
+ return ccid->ccid_ops->ccid_id;
}
-static inline int ccid_hc_rx_init(struct ccid *ccid, struct sock *sk)
+static inline int ccid_get_current_tx_ccid(struct dccp_sock *dp)
{
- int rc = 0;
- if (ccid->ccid_hc_rx_init != NULL)
- rc = ccid->ccid_hc_rx_init(sk);
- return rc;
+ struct ccid *ccid = dp->dccps_hc_tx_ccid;
+
+ if (ccid == NULL || ccid->ccid_ops == NULL)
+ return -1;
+ return ccid->ccid_ops->ccid_id;
}
-static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
+extern void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
+extern void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);
+
+static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb)
{
int rc = 0;
- if (ccid->ccid_hc_tx_init != NULL)
- rc = ccid->ccid_hc_tx_init(sk);
+ if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
+ rc = ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb);
return rc;
}
-static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
-{
- if (ccid->ccid_hc_rx_exit != NULL &&
- dccp_sk(sk)->dccps_hc_rx_ccid_private != NULL)
- ccid->ccid_hc_rx_exit(sk);
-}
-
-static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
+static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
+ int more, unsigned int len)
{
- if (ccid->ccid_hc_tx_exit != NULL &&
- dccp_sk(sk)->dccps_hc_tx_ccid_private != NULL)
- ccid->ccid_hc_tx_exit(sk);
+ if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
+ ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, more, len);
}
static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb)
{
- if (ccid->ccid_hc_rx_packet_recv != NULL)
- ccid->ccid_hc_rx_packet_recv(sk, skb);
+ if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
+ ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
}
static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb)
{
- if (ccid->ccid_hc_tx_packet_recv != NULL)
- ccid->ccid_hc_tx_packet_recv(sk, skb);
+ if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
+ ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
}
static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
unsigned char* value)
{
int rc = 0;
- if (ccid->ccid_hc_tx_parse_options != NULL)
- rc = ccid->ccid_hc_tx_parse_options(sk, option, len, idx,
+ if (ccid->ccid_ops->ccid_hc_tx_parse_options != NULL)
+ rc = ccid->ccid_ops->ccid_hc_tx_parse_options(sk, option, len, idx,
value);
return rc;
}
unsigned char* value)
{
int rc = 0;
- if (ccid->ccid_hc_rx_parse_options != NULL)
- rc = ccid->ccid_hc_rx_parse_options(sk, option, len, idx, value);
+ if (ccid->ccid_ops->ccid_hc_rx_parse_options != NULL)
+ rc = ccid->ccid_ops->ccid_hc_rx_parse_options(sk, option, len, idx, value);
return rc;
}
-static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
- struct sk_buff *skb)
+static inline int ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb)
{
- if (ccid->ccid_hc_tx_insert_options != NULL)
- ccid->ccid_hc_tx_insert_options(sk, skb);
+ if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
+ return ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
+ return 0;
}
-static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
- struct sk_buff *skb)
+static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
+ struct tcp_info *info)
{
- if (ccid->ccid_hc_rx_insert_options != NULL)
- ccid->ccid_hc_rx_insert_options(sk, skb);
+ if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
+ ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
+}
+
+static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
+ struct tcp_info *info)
+{
+ if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
+ ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
+}
+
+static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ int rc = -ENOPROTOOPT;
+ if (ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
+ rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
+ optval, optlen);
+ return rc;
+}
+
+static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ int rc = -ENOPROTOOPT;
+ if (ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
+ rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
+ optval, optlen);
+ return rc;
}
#endif /* _CCID_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff