/* SPDX-License-Identifier: AGPL-3.0-or-later
* Copyright (c) 2021 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
#ifndef UDP_H
#define UDP_H
#define UDP_TIMER_INTERVAL 1000 /* ms */
void udp_sock_handler(const struct ctx *c, union epoll_ref ref, uint32_t events,
const struct timespec *now);
int udp_tap_handler(struct ctx *c, int af, const void *addr,
const struct pool *p, const struct timespec *now);
void udp_sock_init(const struct ctx *c, int ns, sa_family_t af,
const void *addr, in_port_t port);
int udp_init(const struct ctx *c);
void udp_timer(struct ctx *c, const struct timespec *ts);
void udp_update_l2_buf(const unsigned char *eth_d, const unsigned char *eth_s,
const uint32_t *ip_da);
void udp_remap_to_tap(struct ctx *c, in_port_t port, in_port_t delta);
void udp_remap_to_init(struct ctx *c, in_port_t port, in_port_t delta);
/**
* union udp_epoll_ref - epoll reference portion for TCP connections
* @bound: Set if this file descriptor is a bound socket
* @splice: Set if descriptor is associated to "spliced" connection
* @v6: Set for IPv6 sockets or connections
* @port: Source port for connected sockets, bound port otherwise
* @u32: Opaque u32 value of reference
*/
union udp_epoll_ref {
struct {
uint32_t bound:1,
splice:3,
#define UDP_TO_NS 1
#define UDP_TO_INIT 2
#define UDP_BACK_TO_NS 3
#define UDP_BACK_TO_INIT 4
v6:1,
port:16;
} udp;
uint32_t u32;
};
/**
* udp_port_fwd - UDP specific port forwarding configuration
* @f: Generic forwarding configuration
* @rdelta: Reversed delta map to translate source ports on return packets
*/
struct udp_port_fwd {
struct port_fwd f;
in_port_t rdelta[USHRT_MAX];
};
/**
* struct udp_ctx - Execution context for UDP
* @fwd_in: Port forwarding configuration for inbound packets
* @fwd_out: Port forwarding configuration for outbound packets
* @timer_run: Timestamp of most recent timer run
*/
struct udp_ctx {
struct udp_port_fwd fwd_in;
struct udp_port_fwd fwd_out;
struct timespec timer_run;
};
#endif /* UDP_H */
