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- #ifndef _CCID_H
- #define _CCID_H
- #include <net/sock.h>
- #include <linux/compiler.h>
- #include <linux/dccp.h>
- #include <linux/list.h>
- #include <linux/module.h>
- #define CCID_MAX 255
- #define CCID_SLAB_NAME_LENGTH 32
- struct tcp_info;
- 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;
- char ccid_hc_rx_slab_name[CCID_SLAB_NAME_LENGTH];
- char ccid_hc_tx_slab_name[CCID_SLAB_NAME_LENGTH];
- __u32 ccid_hc_rx_obj_size,
- ccid_hc_tx_obj_size;
-
- 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,
- struct sk_buff *skb);
- int (*ccid_hc_rx_parse_options)(struct sock *sk, u8 pkt,
- u8 opt, u8 *val, u8 len);
- 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);
- int (*ccid_hc_tx_parse_options)(struct sock *sk, u8 pkt,
- u8 opt, u8 *val, u8 len);
- int (*ccid_hc_tx_send_packet)(struct sock *sk,
- struct sk_buff *skb);
- void (*ccid_hc_tx_packet_sent)(struct sock *sk,
- 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 struct ccid_operations ccid2_ops;
- #ifdef CONFIG_IP_DCCP_CCID3
- extern struct ccid_operations ccid3_ops;
- #endif
- int ccid_initialize_builtins(void);
- void ccid_cleanup_builtins(void);
- struct ccid {
- struct ccid_operations *ccid_ops;
- char ccid_priv[];
- };
- static inline void *ccid_priv(const struct ccid *ccid)
- {
- return (void *)ccid->ccid_priv;
- }
- bool ccid_support_check(u8 const *ccid_array, u8 array_len);
- int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
- int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
- char __user *, int __user *);
- struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);
- static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
- {
- 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_get_current_tx_ccid(struct dccp_sock *dp)
- {
- struct ccid *ccid = dp->dccps_hc_tx_ccid;
- if (ccid == NULL || ccid->ccid_ops == NULL)
- return -1;
- return ccid->ccid_ops->ccid_id;
- }
- void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
- void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);
- enum ccid_dequeueing_decision {
- CCID_PACKET_SEND_AT_ONCE = 0x00000,
- CCID_PACKET_DELAY_MAX = 0x0FFFF,
- CCID_PACKET_DELAY = 0x10000,
- CCID_PACKET_WILL_DEQUEUE_LATER = 0x20000,
- CCID_PACKET_ERR = 0xF0000,
- };
- static inline int ccid_packet_dequeue_eval(const int return_code)
- {
- if (return_code < 0)
- return CCID_PACKET_ERR;
- if (return_code == 0)
- return CCID_PACKET_SEND_AT_ONCE;
- if (return_code <= CCID_PACKET_DELAY_MAX)
- return CCID_PACKET_DELAY;
- return return_code;
- }
- static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
- struct sk_buff *skb)
- {
- if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
- return ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb);
- return CCID_PACKET_SEND_AT_ONCE;
- }
- static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
- unsigned int len)
- {
- if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
- ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, len);
- }
- static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
- struct sk_buff *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_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,
- u8 pkt, u8 opt, u8 *val, u8 len)
- {
- if (!ccid || !ccid->ccid_ops->ccid_hc_tx_parse_options)
- return 0;
- return ccid->ccid_ops->ccid_hc_tx_parse_options(sk, pkt, opt, val, len);
- }
- static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
- u8 pkt, u8 opt, u8 *val, u8 len)
- {
- if (!ccid || !ccid->ccid_ops->ccid_hc_rx_parse_options)
- return 0;
- return ccid->ccid_ops->ccid_hc_rx_parse_options(sk, pkt, opt, val, len);
- }
- static inline int ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
- struct sk_buff *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_get_info(struct ccid *ccid, struct sock *sk,
- struct tcp_info *info)
- {
- 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 != NULL && 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 != NULL && ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
- rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
- optval, optlen);
- return rc;
- }
- #endif
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