mirror of https://passt.top/passt
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright (c) 2021 Red Hat GmbH
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* Author: Stefano Brivio <sbrivio@redhat.com>
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*/
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#ifndef TCP_H
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#define TCP_H
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#define TCP_TIMER_INTERVAL 1000 /* ms */
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struct ctx;
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void tcp_timer_handler(struct ctx *c, union epoll_ref ref);
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void tcp_listen_handler(struct ctx *c, union epoll_ref ref,
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const struct timespec *now);
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void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events);
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int tcp_tap_handler(struct ctx *c, uint8_t pif, sa_family_t af,
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const void *saddr, const void *daddr,
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const struct pool *p, int idx, const struct timespec *now);
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int tcp_sock_init(const struct ctx *c, sa_family_t af, const void *addr,
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const char *ifname, in_port_t port);
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int tcp_init(struct ctx *c);
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void tcp_timer(struct ctx *c, const struct timespec *now);
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void tcp_defer_handler(struct ctx *c);
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void tcp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s);
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/**
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* union tcp_epoll_ref - epoll reference portion for TCP connections
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* @index: Index of connection in table
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* @u32: Opaque u32 value of reference
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*/
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union tcp_epoll_ref {
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uint32_t index:20;
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uint32_t u32;
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};
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/**
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* union tcp_listen_epoll_ref - epoll reference portion for TCP listening
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* @port: Bound port number of the socket
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* @pif: pif in which the socket is listening
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* @u32: Opaque u32 value of reference
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*/
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union tcp_listen_epoll_ref {
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struct {
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in_port_t port;
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uint8_t pif;
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};
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uint32_t u32;
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};
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/**
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* struct tcp_ctx - Execution context for TCP routines
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* @port_to_tap: Ports bound host-side, packets to tap or spliced
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* @fwd_in: Port forwarding configuration for inbound packets
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* @fwd_out: Port forwarding configuration for outbound packets
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* @timer_run: Timestamp of most recent timer run
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* @kernel_snd_wnd: Kernel reports sending window (with commit 8f7baad7f035)
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* @pipe_size: Size of pipes for spliced connections
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*/
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struct tcp_ctx {
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struct fwd_ports fwd_in;
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struct fwd_ports fwd_out;
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struct timespec timer_run;
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#ifdef HAS_SND_WND
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int kernel_snd_wnd;
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#endif
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size_t pipe_size;
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};
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#endif /* TCP_H */
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