| #ifndef _CCID_H |
| #define _CCID_H |
| /* |
| * net/dccp/ccid.h |
| * |
| * An implementation of the DCCP protocol |
| * Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| * |
| * CCID infrastructure |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #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 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_owner: module which implements/owns this CCID |
| * @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 module *ccid_owner; |
| 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, |
| struct sk_buff *skb); |
| int (*ccid_hc_rx_parse_options)(struct sock *sk, |
| unsigned char option, |
| unsigned char len, u16 idx, |
| unsigned char* value); |
| 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, |
| unsigned char option, |
| unsigned char len, u16 idx, |
| unsigned char* value); |
| int (*ccid_hc_tx_send_packet)(struct sock *sk, |
| 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_operations *ccid_ops); |
| extern int ccid_unregister(struct ccid_operations *ccid_ops); |
| |
| struct ccid { |
| struct ccid_operations *ccid_ops; |
| char ccid_priv[0]; |
| }; |
| |
| static inline void *ccid_priv(const struct ccid *ccid) |
| { |
| return (void *)ccid->ccid_priv; |
| } |
| |
| 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(unsigned char id, struct sock *sk, int rx, |
| gfp_t gfp); |
| |
| extern struct ccid *ccid_hc_rx_new(unsigned char id, struct sock *sk, |
| gfp_t gfp); |
| extern struct ccid *ccid_hc_tx_new(unsigned char id, struct sock *sk, |
| gfp_t gfp); |
| |
| 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_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_tx_packet_sent(struct ccid *ccid, struct sock *sk, |
| int more, unsigned int len) |
| { |
| 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_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, |
| unsigned char option, |
| unsigned char len, u16 idx, |
| unsigned char* value) |
| { |
| int rc = 0; |
| 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; |
| } |
| |
| static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk, |
| unsigned char option, |
| unsigned char len, u16 idx, |
| unsigned char* value) |
| { |
| int rc = 0; |
| 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 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->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 */ |