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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /* * 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 defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) #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, u32 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 defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 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, u32 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 defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 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 defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 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 */ |