forked from mirrors/linux
1ad6d548e2
In order to add the skb drop reasons support to icmpv6_param_prob(), introduce the function icmpv6_param_prob_reason() and make icmpv6_param_prob() an inline call to it. This new function will be used in the following patches. Signed-off-by: Menglong Dong <imagedong@tencent.com> Reviewed-by: Jiang Biao <benbjiang@tencent.com> Reviewed-by: Hao Peng <flyingpeng@tencent.com> Signed-off-by: David S. Miller <davem@davemloft.net>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_ICMPV6_H
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#define _LINUX_ICMPV6_H
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#include <linux/skbuff.h>
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#include <linux/ipv6.h>
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#include <uapi/linux/icmpv6.h>
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static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
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{
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return (struct icmp6hdr *)skb_transport_header(skb);
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}
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#include <linux/netdevice.h>
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#if IS_ENABLED(CONFIG_IPV6)
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typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info,
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const struct in6_addr *force_saddr,
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const struct inet6_skb_parm *parm);
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void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
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const struct in6_addr *force_saddr,
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const struct inet6_skb_parm *parm);
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#if IS_BUILTIN(CONFIG_IPV6)
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static inline void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
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const struct inet6_skb_parm *parm)
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{
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icmp6_send(skb, type, code, info, NULL, parm);
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}
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static inline int inet6_register_icmp_sender(ip6_icmp_send_t *fn)
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{
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BUILD_BUG_ON(fn != icmp6_send);
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return 0;
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}
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static inline int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn)
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{
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BUILD_BUG_ON(fn != icmp6_send);
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return 0;
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}
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#else
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extern void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
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const struct inet6_skb_parm *parm);
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extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
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extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
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#endif
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static inline void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
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{
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__icmpv6_send(skb, type, code, info, IP6CB(skb));
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}
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int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type,
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unsigned int data_len);
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#if IS_ENABLED(CONFIG_NF_NAT)
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void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
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#else
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static inline void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info)
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{
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struct inet6_skb_parm parm = { 0 };
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__icmpv6_send(skb_in, type, code, info, &parm);
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}
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#endif
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#else
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static inline void icmpv6_send(struct sk_buff *skb,
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u8 type, u8 code, __u32 info)
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{
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}
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static inline void icmpv6_ndo_send(struct sk_buff *skb,
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u8 type, u8 code, __u32 info)
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{
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}
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#endif
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extern int icmpv6_init(void);
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extern int icmpv6_err_convert(u8 type, u8 code,
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int *err);
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extern void icmpv6_cleanup(void);
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extern void icmpv6_param_prob_reason(struct sk_buff *skb,
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u8 code, int pos,
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enum skb_drop_reason reason);
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struct flowi6;
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struct in6_addr;
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extern void icmpv6_flow_init(struct sock *sk,
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struct flowi6 *fl6,
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u8 type,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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int oif);
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static inline void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos)
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{
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icmpv6_param_prob_reason(skb, code, pos,
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SKB_DROP_REASON_NOT_SPECIFIED);
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}
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static inline bool icmpv6_is_err(int type)
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{
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switch (type) {
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case ICMPV6_DEST_UNREACH:
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case ICMPV6_PKT_TOOBIG:
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case ICMPV6_TIME_EXCEED:
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case ICMPV6_PARAMPROB:
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return true;
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}
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return false;
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}
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#endif
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