linux-stable/include/linux/icmpv6.h
Eric Dumazet cc7a21b6fb ipv6: icmp6: avoid indirect call for icmpv6_send()
If IPv6 is builtin, we do not need an expensive indirect call
to reach icmp6_send().

v2: put inline keyword before the type to avoid sparse warnings.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-19 13:41:59 -07:00

93 lines
2.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ICMPV6_H
#define _LINUX_ICMPV6_H
#include <linux/skbuff.h>
#include <uapi/linux/icmpv6.h>
static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
{
return (struct icmp6hdr *)skb_transport_header(skb);
}
#include <linux/netdevice.h>
#if IS_ENABLED(CONFIG_IPV6)
typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info,
const struct in6_addr *force_saddr);
#if IS_BUILTIN(CONFIG_IPV6)
void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
const struct in6_addr *force_saddr);
static inline void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
{
icmp6_send(skb, type, code, info, NULL);
}
static inline int inet6_register_icmp_sender(ip6_icmp_send_t *fn)
{
BUILD_BUG_ON(fn != icmp6_send);
return 0;
}
static inline int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn)
{
BUILD_BUG_ON(fn != icmp6_send);
return 0;
}
#else
extern void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info);
extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
#endif
int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type,
unsigned int data_len);
#if IS_ENABLED(CONFIG_NF_NAT)
void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
#else
#define icmpv6_ndo_send icmpv6_send
#endif
#else
static inline void icmpv6_send(struct sk_buff *skb,
u8 type, u8 code, __u32 info)
{
}
static inline void icmpv6_ndo_send(struct sk_buff *skb,
u8 type, u8 code, __u32 info)
{
}
#endif
extern int icmpv6_init(void);
extern int icmpv6_err_convert(u8 type, u8 code,
int *err);
extern void icmpv6_cleanup(void);
extern void icmpv6_param_prob(struct sk_buff *skb,
u8 code, int pos);
struct flowi6;
struct in6_addr;
extern void icmpv6_flow_init(struct sock *sk,
struct flowi6 *fl6,
u8 type,
const struct in6_addr *saddr,
const struct in6_addr *daddr,
int oif);
static inline bool icmpv6_is_err(int type)
{
switch (type) {
case ICMPV6_DEST_UNREACH:
case ICMPV6_PKT_TOOBIG:
case ICMPV6_TIME_EXCEED:
case ICMPV6_PARAMPROB:
return true;
}
return false;
}
#endif