include/net/seg6.h

Source file repositories/reference/linux-study-clean/include/net/seg6.h

File Facts

System
Linux kernel
Corpus path
include/net/seg6.h
Extension
.h
Size
2485 bytes
Lines
95
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

struct seg6_pernet_data {
	struct mutex lock;
	struct in6_addr __rcu *tun_src;
#ifdef CONFIG_IPV6_SEG6_HMAC
	struct rhashtable hmac_infos;
#endif
};

static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
{
#if IS_ENABLED(CONFIG_IPV6)
	return net->ipv6.seg6_data;
#else
	return NULL;
#endif
}

extern int seg6_init(void);
extern void seg6_exit(void);
#ifdef CONFIG_IPV6_SEG6_LWTUNNEL
extern int seg6_iptunnel_init(void);
extern void seg6_iptunnel_exit(void);
extern int seg6_local_init(void);
extern void seg6_local_exit(void);
#else
static inline int seg6_iptunnel_init(void) { return 0; }
static inline void seg6_iptunnel_exit(void) {}
static inline int seg6_local_init(void) { return 0; }
static inline void seg6_local_exit(void) {}
#endif

extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced);
extern struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags);
extern void seg6_icmp_srh(struct sk_buff *skb, struct inet6_skb_parm *opt);
extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
			     int proto);
extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,
			       u32 tbl_id);

/* If the packet which invoked an ICMP error contains an SRH return
 * the true destination address from within the SRH, otherwise use the
 * destination address in the IP header.
 */
static inline const struct in6_addr *seg6_get_daddr(struct sk_buff *skb,
						    struct inet6_skb_parm *opt)
{
	struct ipv6_sr_hdr *srh;

	if (opt->flags & IP6SKB_SEG6) {
		srh = (struct ipv6_sr_hdr *)(skb->data + opt->srhoff);
		return  &srh->segments[0];
	}

	return NULL;
}


#endif

Annotation

Implementation Notes