linux/net/ipv4/udp_offload.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	IPV4 GSO/GRO offload support
 *	Linux INET implementation
 *
 *	UDPv4 GSO support
 */

#include <linux/skbuff.h>
#include <net/gro.h>
#include <net/gso.h>
#include <net/udp.h>
#include <net/protocol.h>
#include <net/inet_common.h>

static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb,
	netdev_features_t features,
	struct sk_buff *(*gso_inner_segment)(struct sk_buff *skb,
					     netdev_features_t features),
	__be16 new_protocol, bool is_ipv6)
{ … }

struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
				       netdev_features_t features,
				       bool is_ipv6)
{ … }
EXPORT_SYMBOL(…);

static void __udpv4_gso_segment_csum(struct sk_buff *seg,
				     __be32 *oldip, __be32 *newip,
				     __be16 *oldport, __be16 *newport)
{ … }

static struct sk_buff *__udpv4_gso_segment_list_csum(struct sk_buff *segs)
{ … }

static struct sk_buff *__udp_gso_segment_list(struct sk_buff *skb,
					      netdev_features_t features,
					      bool is_ipv6)
{ … }

struct sk_buff *__udp_gso_segment(struct sk_buff *gso_skb,
				  netdev_features_t features, bool is_ipv6)
{ … }
EXPORT_SYMBOL_GPL(…);

static struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb,
					 netdev_features_t features)
{ … }


#define UDP_GRO_CNT_MAX …
static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
					       struct sk_buff *skb)
{ … }

struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
				struct udphdr *uh, struct sock *sk)
{ … }
EXPORT_SYMBOL(…);

static struct sock *udp4_gro_lookup_skb(struct sk_buff *skb, __be16 sport,
					__be16 dport)
{ … }

INDIRECT_CALLABLE_SCOPE
struct sk_buff *udp4_gro_receive(struct list_head *head, struct sk_buff *skb)
{ … }

static int udp_gro_complete_segment(struct sk_buff *skb)
{ … }

int udp_gro_complete(struct sk_buff *skb, int nhoff,
		     udp_lookup_t lookup)
{ … }
EXPORT_SYMBOL(…);

INDIRECT_CALLABLE_SCOPE int udp4_gro_complete(struct sk_buff *skb, int nhoff)
{ … }

int __init udpv4_offload_init(void)
{ … }