/* 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(in_port_t port, in_port_t delta);
void udp_remap_to_init(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;
};
/**
* struct udp_ctx - Execution context for UDP
* @port_to_tap: Ports bound host-side, data to tap or ns L4 socket
* @fwd_mode_in: Port forwarding mode for inbound packets
* @port_to_init: Ports bound namespace-side, data to init L4 socket
* @fwd_mode_out: Port forwarding mode for outbound packets
* @timer_run: Timestamp of most recent timer run
*/
struct udp_ctx {
uint8_t port_to_tap [PORT_BITMAP_SIZE];
enum port_fwd_mode fwd_mode_in;
uint8_t port_to_init [PORT_BITMAP_SIZE];
enum port_fwd_mode fwd_mode_out;
struct timespec timer_run;
};
#endif /* UDP_H */
