__ __ __ __ _____ _ _ _____ _ _ _ | \/ | \ \ / / | __ \ (_) | | / ____| | | | | | \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | | | |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | | | | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | | |_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1 if you need WebShell for Seo everyday contact me on Telegram Telegram Address : @jackleetFor_More_Tools:
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* NET Generic infrastructure for Network protocols.
*
* Definitions for request_sock
*
* Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* From code originally in include/net/tcp.h
*/
#ifndef _REQUEST_SOCK_H
#define _REQUEST_SOCK_H
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/bug.h>
#include <linux/refcount.h>
#include <net/sock.h>
#include <net/rstreason.h>
struct request_sock;
struct sk_buff;
struct dst_entry;
struct proto;
struct request_sock_ops {
int family;
unsigned int obj_size;
struct kmem_cache *slab;
char *slab_name;
int (*rtx_syn_ack)(const struct sock *sk,
struct request_sock *req);
void (*send_ack)(const struct sock *sk, struct sk_buff *skb,
struct request_sock *req);
void (*send_reset)(const struct sock *sk,
struct sk_buff *skb,
enum sk_rst_reason reason);
void (*destructor)(struct request_sock *req);
void (*syn_ack_timeout)(const struct request_sock *req);
};
int inet_rtx_syn_ack(const struct sock *parent, struct request_sock *req);
struct saved_syn {
u32 mac_hdrlen;
u32 network_hdrlen;
u32 tcp_hdrlen;
u8 data[];
};
/* struct request_sock - mini sock to represent a connection request
*/
struct request_sock {
struct sock_common __req_common;
#define rsk_refcnt __req_common.skc_refcnt
#define rsk_hash __req_common.skc_hash
#define rsk_listener __req_common.skc_listener
#define rsk_window_clamp __req_common.skc_window_clamp
#define rsk_rcv_wnd __req_common.skc_rcv_wnd
struct request_sock *dl_next;
u16 mss;
u8 num_retrans; /* number of retransmits */
u8 syncookie:1; /* syncookie: encode tcpopts in timestamp */
u8 num_timeout:7; /* number of timeouts */
u32 ts_recent;
struct timer_list rsk_timer;
const struct request_sock_ops *rsk_ops;
struct sock *sk;
struct saved_syn *saved_syn;
u32 secid;
u32 peer_secid;
};
static inline struct request_sock *inet_reqsk(const struct sock *sk)
{
return (struct request_sock *)sk;
}
static inline struct sock *req_to_sk(struct request_sock *req)
{
return (struct sock *)req;
}
static inline struct request_sock *
reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener,
bool attach_listener)
{
struct request_sock *req;
req = kmem_cache_alloc(ops->slab, GFP_ATOMIC | __GFP_NOWARN);
if (!req)
return NULL;
req->rsk_listener = NULL;
if (attach_listener) {
if (unlikely(!refcount_inc_not_zero(&sk_listener->sk_refcnt))) {
kmem_cache_free(ops->slab, req);
return NULL;
}
req->rsk_listener = sk_listener;
}
req->rsk_ops = ops;
req_to_sk(req)->sk_prot = sk_listener->sk_prot;
sk_node_init(&req_to_sk(req)->sk_node);
sk_tx_queue_clear(req_to_sk(req));
req->saved_syn = NULL;
req->num_timeout = 0;
req->num_retrans = 0;
req->sk = NULL;
refcount_set(&req->rsk_refcnt, 0);
return req;
}
static inline void __reqsk_free(struct request_sock *req)
{
req->rsk_ops->destructor(req);
if (req->rsk_listener)
sock_put(req->rsk_listener);
kfree(req->saved_syn);
kmem_cache_free(req->rsk_ops->slab, req);
}
static inline void reqsk_free(struct request_sock *req)
{
WARN_ON_ONCE(refcount_read(&req->rsk_refcnt) != 0);
__reqsk_free(req);
}
static inline void reqsk_put(struct request_sock *req)
{
if (refcount_dec_and_test(&req->rsk_refcnt))
reqsk_free(req);
}
/*
* For a TCP Fast Open listener -
* lock - protects the access to all the reqsk, which is co-owned by
* the listener and the child socket.
* qlen - pending TFO requests (still in TCP_SYN_RECV).
* max_qlen - max TFO reqs allowed before TFO is disabled.
*
* XXX (TFO) - ideally these fields can be made as part of "listen_sock"
* structure above. But there is some implementation difficulty due to
* listen_sock being part of request_sock_queue hence will be freed when
* a listener is stopped. But TFO related fields may continue to be
* accessed even after a listener is closed, until its sk_refcnt drops
* to 0 implying no more outstanding TFO reqs. One solution is to keep
* listen_opt around until sk_refcnt drops to 0. But there is some other
* complexity that needs to be resolved. E.g., a listener can be disabled
* temporarily through shutdown()->tcp_disconnect(), and re-enabled later.
*/
struct fastopen_queue {
struct request_sock *rskq_rst_head; /* Keep track of past TFO */
struct request_sock *rskq_rst_tail; /* requests that caused RST.
* This is part of the defense
* against spoofing attack.
*/
spinlock_t lock;
int qlen; /* # of pending (TCP_SYN_RECV) reqs */
int max_qlen; /* != 0 iff TFO is currently enabled */
struct tcp_fastopen_context __rcu *ctx; /* cipher context for cookie */
};
/** struct request_sock_queue - queue of request_socks
*
* @rskq_accept_head - FIFO head of established children
* @rskq_accept_tail - FIFO tail of established children
* @rskq_defer_accept - User waits for some data after accept()
*
*/
struct request_sock_queue {
spinlock_t rskq_lock;
u8 rskq_defer_accept;
u32 synflood_warned;
atomic_t qlen;
atomic_t young;
struct request_sock *rskq_accept_head;
struct request_sock *rskq_accept_tail;
struct fastopen_queue fastopenq; /* Check max_qlen != 0 to determine
* if TFO is enabled.
*/
};
void reqsk_queue_alloc(struct request_sock_queue *queue);
void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
bool reset);
static inline bool reqsk_queue_empty(const struct request_sock_queue *queue)
{
return READ_ONCE(queue->rskq_accept_head) == NULL;
}
static inline struct request_sock *reqsk_queue_remove(struct request_sock_queue *queue,
struct sock *parent)
{
struct request_sock *req;
spin_lock_bh(&queue->rskq_lock);
req = queue->rskq_accept_head;
if (req) {
sk_acceptq_removed(parent);
WRITE_ONCE(queue->rskq_accept_head, req->dl_next);
if (queue->rskq_accept_head == NULL)
queue->rskq_accept_tail = NULL;
}
spin_unlock_bh(&queue->rskq_lock);
return req;
}
static inline void reqsk_queue_removed(struct request_sock_queue *queue,
const struct request_sock *req)
{
if (req->num_timeout == 0)
atomic_dec(&queue->young);
atomic_dec(&queue->qlen);
}
static inline void reqsk_queue_added(struct request_sock_queue *queue)
{
atomic_inc(&queue->young);
atomic_inc(&queue->qlen);
}
static inline int reqsk_queue_len(const struct request_sock_queue *queue)
{
return atomic_read(&queue->qlen);
}
static inline int reqsk_queue_len_young(const struct request_sock_queue *queue)
{
return atomic_read(&queue->young);
}
#endif /* _REQUEST_SOCK_H */
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| 9p | Folder | 0755 |
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| bluetooth | Folder | 0755 |
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| caif | Folder | 0755 |
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| iucv | Folder | 0755 |
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| libeth | Folder | 0755 |
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| mana | Folder | 0755 |
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| netfilter | Folder | 0755 |
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| netns | Folder | 0755 |
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| nfc | Folder | 0755 |
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| page_pool | Folder | 0755 |
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| phonet | Folder | 0755 |
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| sctp | Folder | 0755 |
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| tc_act | Folder | 0755 |
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| 6lowpan.h | File | 10.03 KB | 0644 |
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| Space.h | File | 1.07 KB | 0644 |
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| act_api.h | File | 9.31 KB | 0644 |
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| addrconf.h | File | 14.26 KB | 0644 |
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| af_ieee802154.h | File | 1.19 KB | 0644 |
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| af_rxrpc.h | File | 3.35 KB | 0644 |
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| af_unix.h | File | 3.3 KB | 0644 |
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| arp.h | File | 2.09 KB | 0644 |
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| bpf_sk_storage.h | File | 1.74 KB | 0644 |
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| dn_dev.h | File | 5.39 KB | 0644 |
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| dn_fib.h | File | 4.04 KB | 0644 |
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| dn_neigh.h | File | 996 B | 0644 |
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| dn_nsp.h | File | 5.5 KB | 0644 |
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| dn_route.h | File | 4.01 KB | 0644 |
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| dropreason-core.h | File | 17.92 KB | 0644 |
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| dropreason.h | File | 1.18 KB | 0644 |
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| dsa.h | File | 33.46 KB | 0644 |
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| dsa_stubs.h | File | 1.3 KB | 0644 |
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| dsfield.h | File | 1.12 KB | 0644 |
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| icmp.h | File | 1.87 KB | 0644 |
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| ieee80211_radiotap.h | File | 23.25 KB | 0644 |
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| ieee802154_netdev.h | File | 8.75 KB | 0644 |
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| if_inet6.h | File | 6.55 KB | 0644 |
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| ife.h | File | 1.03 KB | 0644 |
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| ila.h | File | 308 B | 0644 |
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| inet6_connection_sock.h | File | 794 B | 0644 |
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| inet6_hashtables.h | File | 3.6 KB | 0644 |
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| inet_common.h | File | 2.9 KB | 0644 |
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| inet_ecn.h | File | 7.83 KB | 0644 |
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| inet_frag.h | File | 5.26 KB | 0644 |
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| inet_sock.h | File | 9.3 KB | 0644 |
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| inet_timewait_sock.h | File | 3.56 KB | 0644 |
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| inetpeer.h | File | 3.29 KB | 0644 |
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| ip.h | File | 22.1 KB | 0644 |
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| ip6_checksum.h | File | 2.47 KB | 0644 |
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| ip6_fib.h | File | 15.82 KB | 0644 |
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| ip6_route.h | File | 10.27 KB | 0644 |
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| ip6_tunnel.h | File | 5.04 KB | 0644 |
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| ip_fib.h | File | 17.27 KB | 0644 |
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| ip_tunnels.h | File | 18.36 KB | 0644 |
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| ip_vs.h | File | 49.62 KB | 0644 |
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| ipcomp.h | File | 737 B | 0644 |
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| ipconfig.h | File | 837 B | 0644 |
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| ipv6.h | File | 37.44 KB | 0644 |
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| ipv6_frag.h | File | 3.36 KB | 0644 |
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| ipv6_stubs.h | File | 3.45 KB | 0644 |
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| ipx.h | File | 4.28 KB | 0644 |
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| iw_handler.h | File | 18.97 KB | 0644 |
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| kcm.h | File | 4.82 KB | 0644 |
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| l3mdev.h | File | 7.76 KB | 0644 |
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| lag.h | File | 409 B | 0644 |
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| lapb.h | File | 4.81 KB | 0644 |
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| llc.h | File | 4.38 KB | 0644 |
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| llc_c_ac.h | File | 9.39 KB | 0644 |
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| llc_c_ev.h | File | 10.68 KB | 0644 |
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| llc_c_st.h | File | 1.77 KB | 0644 |
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| llc_conn.h | File | 4.09 KB | 0644 |
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| llc_if.h | File | 2.16 KB | 0644 |
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| llc_pdu.h | File | 14.35 KB | 0644 |
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| llc_s_ac.h | File | 1.59 KB | 0644 |
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| llc_s_ev.h | File | 2.22 KB | 0644 |
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| llc_s_st.h | File | 1.03 KB | 0644 |
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| llc_sap.h | File | 1.08 KB | 0644 |
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| lwtunnel.h | File | 6.75 KB | 0644 |
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| mac80211.h | File | 305.5 KB | 0644 |
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| mac802154.h | File | 14.88 KB | 0644 |
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| macsec.h | File | 10.25 KB | 0644 |
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| mip6.h | File | 1016 B | 0644 |
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| mld.h | File | 2.85 KB | 0644 |
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| mpls.h | File | 943 B | 0644 |
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| mpls_iptunnel.h | File | 481 B | 0644 |
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| mptcp.h | File | 7.35 KB | 0644 |
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| mrp.h | File | 3.11 KB | 0644 |
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| ncsi.h | File | 1.94 KB | 0644 |
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| ndisc.h | File | 15.05 KB | 0644 |
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| neighbour.h | File | 16.54 KB | 0644 |
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| net_debug.h | File | 5.07 KB | 0644 |
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| net_failover.h | File | 1023 B | 0644 |
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| net_namespace.h | File | 13.8 KB | 0644 |
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| net_ratelimit.h | File | 220 B | 0644 |
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| net_shaper.h | File | 3.49 KB | 0644 |
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| net_trackers.h | File | 424 B | 0644 |
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| netdev_queues.h | File | 10.02 KB | 0644 |
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| netdev_rx_queue.h | File | 1.5 KB | 0644 |
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| netevent.h | File | 1.04 KB | 0644 |
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| netlabel.h | File | 20.3 KB | 0644 |
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| netlink.h | File | 72.72 KB | 0644 |
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| netprio_cgroup.h | File | 1.02 KB | 0644 |
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| netrom.h | File | 7.73 KB | 0644 |
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| nexthop.h | File | 13.16 KB | 0644 |
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| nl802154.h | File | 12 KB | 0644 |
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| nsh.h | File | 12.31 KB | 0644 |
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| p8022.h | File | 504 B | 0644 |
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| protocol.h | File | 3.81 KB | 0644 |
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| psample.h | File | 1.22 KB | 0644 |
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| psnap.h | File | 430 B | 0644 |
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| raw.h | File | 2.48 KB | 0644 |
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| rawv6.h | File | 856 B | 0644 |
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| red.h | File | 11.39 KB | 0644 |
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| regulatory.h | File | 9.88 KB | 0644 |
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| request_sock.h | File | 6.53 KB | 0644 |
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| rose.h | File | 7.64 KB | 0644 |
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| route.h | File | 11.17 KB | 0644 |
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| rpl.h | File | 839 B | 0644 |
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| rps.h | File | 3.41 KB | 0644 |
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| rsi_91x.h | File | 1.67 KB | 0644 |
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| rstreason.h | File | 6.02 KB | 0644 |
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| rtnetlink.h | File | 7.82 KB | 0644 |
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| rtnh.h | File | 859 B | 0644 |
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| sch_generic.h | File | 34.42 KB | 0644 |
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| scm.h | File | 3.54 KB | 0644 |
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| secure_seq.h | File | 868 B | 0644 |
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| seg6.h | File | 2.43 KB | 0644 |
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| seg6_hmac.h | File | 1.7 KB | 0644 |
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| seg6_local.h | File | 644 B | 0644 |
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| selftests.h | File | 582 B | 0644 |
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| snmp.h | File | 5.14 KB | 0644 |
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| sock.h | File | 84.92 KB | 0644 |
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| sock_reuseport.h | File | 1.83 KB | 0644 |
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| stp.h | File | 412 B | 0644 |
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| strparser.h | File | 4.25 KB | 0644 |
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| switchdev.h | File | 15.1 KB | 0644 |
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| tc_wrapper.h | File | 6.29 KB | 0644 |
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| tcp.h | File | 76.22 KB | 0644 |
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| tcp_states.h | File | 1.3 KB | 0644 |
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| tcx.h | File | 4.3 KB | 0644 |
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| timewait_sock.h | File | 925 B | 0644 |
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| tls.h | File | 13.82 KB | 0644 |
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| tls_prot.h | File | 1.84 KB | 0644 |
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| tls_toe.h | File | 2.94 KB | 0644 |
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| transp_v6.h | File | 1.95 KB | 0644 |
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| tso.h | File | 566 B | 0644 |
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| tun_proto.h | File | 1015 B | 0644 |
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| udp.h | File | 15.73 KB | 0644 |
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| udp_tunnel.h | File | 12.67 KB | 0644 |
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| udplite.h | File | 2.38 KB | 0644 |
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| vsock_addr.h | File | 662 B | 0644 |
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| vxlan.h | File | 15.75 KB | 0644 |
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| wext.h | File | 1.47 KB | 0644 |
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| x25device.h | File | 387 B | 0644 |
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| xdp.h | File | 14.43 KB | 0644 |
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| xdp_priv.h | File | 427 B | 0644 |
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| xdp_sock.h | File | 6.39 KB | 0644 |
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| xdp_sock_drv.h | File | 9.01 KB | 0644 |
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| xfrm.h | File | 57.78 KB | 0644 |
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| xsk_buff_pool.h | File | 6.91 KB | 0644 |
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