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Diffstat (limited to 'include/net/protocol.h')
| -rw-r--r-- | include/net/protocol.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/include/net/protocol.h b/include/net/protocol.h new file mode 100644 index 00000000..875f4895 --- /dev/null +++ b/include/net/protocol.h @@ -0,0 +1,110 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Definitions for the protocol dispatcher. + * + * Version: @(#)protocol.h 1.0.2 05/07/93 + * + * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Changes: + * Alan Cox : Added a name field and a frag handler + * field for later. + * Alan Cox : Cleaned up, and sorted types. + * Pedro Roque : inet6 protocols + */ + +#ifndef _PROTOCOL_H +#define _PROTOCOL_H + +#include <linux/in6.h> +#if IS_ENABLED(CONFIG_IPV6) +#include <linux/ipv6.h> +#endif + +#define MAX_INET_PROTOS 256 /* Must be a power of 2 */ + + +/* This is used to register protocols. */ +struct net_protocol { + int (*handler)(struct sk_buff *skb); + void (*err_handler)(struct sk_buff *skb, u32 info); + int (*gso_send_check)(struct sk_buff *skb); + struct sk_buff *(*gso_segment)(struct sk_buff *skb, + netdev_features_t features); + struct sk_buff **(*gro_receive)(struct sk_buff **head, + struct sk_buff *skb); + int (*gro_complete)(struct sk_buff *skb); + unsigned int no_policy:1, + netns_ok:1; +}; + +#if IS_ENABLED(CONFIG_IPV6) +struct inet6_protocol { + int (*handler)(struct sk_buff *skb); + + void (*err_handler)(struct sk_buff *skb, + struct inet6_skb_parm *opt, + u8 type, u8 code, int offset, + __be32 info); + + int (*gso_send_check)(struct sk_buff *skb); + struct sk_buff *(*gso_segment)(struct sk_buff *skb, + netdev_features_t features); + struct sk_buff **(*gro_receive)(struct sk_buff **head, + struct sk_buff *skb); + int (*gro_complete)(struct sk_buff *skb); + + unsigned int flags; /* INET6_PROTO_xxx */ +}; + +#define INET6_PROTO_NOPOLICY 0x1 +#define INET6_PROTO_FINAL 0x2 +/* This should be set for any extension header which is compatible with GSO. */ +#define INET6_PROTO_GSO_EXTHDR 0x4 +#endif + +/* This is used to register socket interfaces for IP protocols. */ +struct inet_protosw { + struct list_head list; + + /* These two fields form the lookup key. */ + unsigned short type; /* This is the 2nd argument to socket(2). */ + unsigned short protocol; /* This is the L4 protocol number. */ + + struct proto *prot; + const struct proto_ops *ops; + + char no_check; /* checksum on rcv/xmit/none? */ + unsigned char flags; /* See INET_PROTOSW_* below. */ +}; +#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */ +#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */ +#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */ + +extern const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS]; + +#if IS_ENABLED(CONFIG_IPV6) +extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS]; +#endif + +extern int inet_add_protocol(const struct net_protocol *prot, unsigned char num); +extern int inet_del_protocol(const struct net_protocol *prot, unsigned char num); +extern void inet_register_protosw(struct inet_protosw *p); +extern void inet_unregister_protosw(struct inet_protosw *p); + +#if IS_ENABLED(CONFIG_IPV6) +extern int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num); +extern int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num); +extern int inet6_register_protosw(struct inet_protosw *p); +extern void inet6_unregister_protosw(struct inet_protosw *p); +#endif + +#endif /* _PROTOCOL_H */ |