/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for inet_sock * * Authors: Many, reorganised here by * Arnaldo Carvalho de Melo <[email protected]> */ #ifndef _INET_SOCK_H #define _INET_SOCK_H #include <linux/bitops.h> #include <linux/string.h> #include <linux/types.h> #include <linux/jhash.h> #include <linux/netdevice.h> #include <net/flow.h> #include <net/sock.h> #include <net/request_sock.h> #include <net/netns/hash.h> #include <net/tcp_states.h> #include <net/l3mdev.h> /** struct ip_options - IP Options * * @faddr - Saved first hop address * @nexthop - Saved nexthop address in LSRR and SSRR * @is_strictroute - Strict source route * @srr_is_hit - Packet destination addr was our one * @is_changed - IP checksum more not valid * @rr_needaddr - Need to record addr of outgoing dev * @ts_needtime - Need to record timestamp * @ts_needaddr - Need to record addr of outgoing dev */ struct ip_options { … }; struct ip_options_rcu { … }; struct ip_options_data { … }; struct inet_request_sock { … }; static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) { … } static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb) { … } static inline int inet_request_bound_dev_if(const struct sock *sk, struct sk_buff *skb) { … } static inline int inet_sk_bound_l3mdev(const struct sock *sk) { … } static inline bool inet_bound_dev_eq(bool l3mdev_accept, int bound_dev_if, int dif, int sdif) { … } static inline bool inet_sk_bound_dev_eq(struct net *net, int bound_dev_if, int dif, int sdif) { … } struct inet_cork { … }; struct inet_cork_full { … }; struct ip_mc_socklist; struct ipv6_pinfo; struct rtable; /** struct inet_sock - representation of INET sockets * * @sk - ancestor class * @pinet6 - pointer to IPv6 control block * @inet_daddr - Foreign IPv4 addr * @inet_rcv_saddr - Bound local IPv4 addr * @inet_dport - Destination port * @inet_num - Local port * @inet_flags - various atomic flags * @inet_saddr - Sending source * @uc_ttl - Unicast TTL * @inet_sport - Source port * @inet_id - ID counter for DF pkts * @tos - TOS * @mc_ttl - Multicasting TTL * @uc_index - Unicast outgoing device index * @mc_index - Multicast device index * @mc_list - Group array * @cork - info to build ip hdr on each ip frag while socket is corked */ struct inet_sock { … }; #define IPCORK_OPT … enum { … }; /* cmsg flags for inet */ #define IP_CMSG_PKTINFO … #define IP_CMSG_TTL … #define IP_CMSG_TOS … #define IP_CMSG_RECVOPTS … #define IP_CMSG_RETOPTS … #define IP_CMSG_PASSSEC … #define IP_CMSG_ORIGDSTADDR … #define IP_CMSG_CHECKSUM … #define IP_CMSG_RECVFRAGSIZE … #define IP_CMSG_ALL … static inline unsigned long inet_cmsg_flags(const struct inet_sock *inet) { … } #define inet_test_bit(nr, sk) … #define inet_set_bit(nr, sk) … #define inet_clear_bit(nr, sk) … #define inet_assign_bit(nr, sk, val) … /** * sk_to_full_sk - Access to a full socket * @sk: pointer to a socket * * SYNACK messages might be attached to request sockets. * Some places want to reach the listener in this case. */ static inline struct sock *sk_to_full_sk(struct sock *sk) { … } /* sk_to_full_sk() variant with a const argument */ static inline const struct sock *sk_const_to_full_sk(const struct sock *sk) { … } static inline struct sock *skb_to_full_sk(const struct sk_buff *skb) { … } #define inet_sk(ptr) … static inline void __inet_sk_copy_descendant(struct sock *sk_to, const struct sock *sk_from, const int ancestor_size) { … } int inet_sk_rebuild_header(struct sock *sk); /** * inet_sk_state_load - read sk->sk_state for lockless contexts * @sk: socket pointer * * Paired with inet_sk_state_store(). Used in places we don't hold socket lock: * tcp_diag_get_info(), tcp_get_info(), tcp_poll(), get_tcp4_sock() ... */ static inline int inet_sk_state_load(const struct sock *sk) { … } /** * inet_sk_state_store - update sk->sk_state * @sk: socket pointer * @newstate: new state * * Paired with inet_sk_state_load(). Should be used in contexts where * state change might impact lockless readers. */ void inet_sk_state_store(struct sock *sk, int newstate); void inet_sk_set_state(struct sock *sk, int state); static inline unsigned int __inet_ehashfn(const __be32 laddr, const __u16 lport, const __be32 faddr, const __be16 fport, u32 initval) { … } struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener, bool attach_listener); static inline __u8 inet_sk_flowi_flags(const struct sock *sk) { … } static inline void inet_inc_convert_csum(struct sock *sk) { … } static inline void inet_dec_convert_csum(struct sock *sk) { … } static inline bool inet_get_convert_csum(struct sock *sk) { … } static inline bool inet_can_nonlocal_bind(struct net *net, struct inet_sock *inet) { … } static inline bool inet_addr_valid_or_nonlocal(struct net *net, struct inet_sock *inet, __be32 addr, int addr_type) { … } #endif /* _INET_SOCK_H */
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