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/* SPDX-License-Identifier: GPL-2.0-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(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 *saddr, const void *daddr,
const struct pool *p, const struct timespec *now);
int udp_sock_init(const struct ctx *c, int ns, sa_family_t af,
const void *addr, const char *ifname, in_port_t port);
int udp_init(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 struct in_addr *ip_da);
/**
* union udp_epoll_ref - epoll reference portion for TCP connections
* @bound: Set if this file descriptor is a bound socket
* @splice: Set if descriptor packets to be "spliced"
* @orig: Set if a spliced socket which can originate "connections"
* @ns: Set if this is a socket in the pasta network namespace
* @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 {
bool splice:1,
orig:1,
ns:1,
v6:1;
uint32_t port:16;
};
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[NUM_PORTS];
};
/**
* 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 */
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