/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright (c) 2021 Red Hat GmbH
 * Author: Stefano Brivio <sbrivio@redhat.com>
 */

#ifndef UDP_INTERNAL_H
#define UDP_INTERNAL_H

#define UDP_CONN_TIMEOUT	180 /* s, timeout for ephemeral or local bind */
#define UDP_MAX_FRAMES		32  /* max # of frames to receive at once */

extern struct sockaddr_in udp4_localname;
extern struct sockaddr_in6 udp6_localname;

/**
 * struct udp_payload_t - UDP header and data for inbound messages
 * @uh:		UDP header
 * @data:	UDP data
 */
struct udp_payload_t {
	struct udphdr uh;
	char data[USHRT_MAX - sizeof(struct udphdr)];
#ifdef __AVX2__
} __attribute__ ((packed, aligned(32)));
#else
} __attribute__ ((packed, aligned(__alignof__(unsigned int))));
#endif

size_t udp_update_hdr4(const struct ctx *c,
		       struct iphdr *ip4h, const struct sockaddr_in *s_in,
		       struct udp_payload_t *bp,
		       in_port_t dstport, size_t dlen,
		       const struct timespec *now);
size_t udp_update_hdr6(const struct ctx *c,
		       struct ipv6hdr *ip6h, struct sockaddr_in6 *s_in6,
		       struct udp_payload_t *bp,
		       in_port_t dstport, size_t dlen,
		       const struct timespec *now);
#endif /* UDP_INTERNAL_H */