^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * INET An implementation of the TCP/IP protocol suite for the LINUX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * operating system. INET is implemented using the BSD Socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * interface as the means of communication with the user level.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Definitions for the protocol dispatcher.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Version: @(#)protocol.h 1.0.2 05/07/93
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Changes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Alan Cox : Added a name field and a frag handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * field for later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Alan Cox : Cleaned up, and sorted types.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Pedro Roque : inet6 protocols
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #ifndef _PROTOCOL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define _PROTOCOL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/in6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* This is one larger than the largest protocol value that can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * found in an ipv4 or ipv6 header. Since in both cases the protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * value is presented in a __u8, this is defined to be 256.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define MAX_INET_PROTOS 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* This is used to register protocols. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct net_protocol {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int (*early_demux)(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int (*early_demux_handler)(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int (*handler)(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* This returns an error if we weren't able to handle the error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int (*err_handler)(struct sk_buff *skb, u32 info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned int no_policy:1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) netns_ok:1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* does the protocol do more stringent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * icmp tag validation than simple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * socket lookup?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) icmp_strict_tag_validation:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct inet6_protocol {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) void (*early_demux)(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) void (*early_demux_handler)(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) int (*handler)(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* This returns an error if we weren't able to handle the error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int (*err_handler)(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct inet6_skb_parm *opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) u8 type, u8 code, int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) __be32 info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) unsigned int flags; /* INET6_PROTO_xxx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define INET6_PROTO_NOPOLICY 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define INET6_PROTO_FINAL 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct net_offload {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct offload_callbacks callbacks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) unsigned int flags; /* Flags used by IPv6 for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* This should be set for any extension header which is compatible with GSO. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define INET6_PROTO_GSO_EXTHDR 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* This is used to register socket interfaces for IP protocols. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct inet_protosw {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* These two fields form the lookup key. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned short type; /* This is the 2nd argument to socket(2). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned short protocol; /* This is the L4 protocol number. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct proto *prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) const struct proto_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) unsigned char flags; /* See INET_PROTOSW_* below. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) extern struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) extern struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int inet_del_protocol(const struct net_protocol *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int inet_add_offload(const struct net_offload *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int inet_del_offload(const struct net_offload *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) void inet_register_protosw(struct inet_protosw *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) void inet_unregister_protosw(struct inet_protosw *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int inet6_register_protosw(struct inet_protosw *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) void inet6_unregister_protosw(struct inet_protosw *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int inet6_add_offload(const struct net_offload *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int inet6_del_offload(const struct net_offload *prot, unsigned char num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #endif /* _PROTOCOL_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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