| /* |
| * 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 inet_sock |
| * |
| * Authors: Many, reorganised here by |
| * Arnaldo Carvalho de Melo <acme@mandriva.com> |
| * |
| * 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. |
| */ |
| #ifndef _INET_SOCK_H |
| #define _INET_SOCK_H |
| |
| |
| #include <linux/string.h> |
| #include <linux/types.h> |
| #include <linux/jhash.h> |
| |
| #include <net/flow.h> |
| #include <net/sock.h> |
| #include <net/request_sock.h> |
| #include <net/netns/hash.h> |
| |
| /** struct ip_options - IP Options |
| * |
| * @faddr - Saved first hop address |
| * @is_data - Options in __data, rather than skb |
| * @is_strictroute - Strict source route |
| * @srr_is_hit - Packet destination addr was our one |
| * @is_changed - IP checksum more not valid |
| * @rr_needaddr - Need to record addr of outgoing dev |
| * @ts_needtime - Need to record timestamp |
| * @ts_needaddr - Need to record addr of outgoing dev |
| */ |
| struct ip_options { |
| __be32 faddr; |
| unsigned char optlen; |
| unsigned char srr; |
| unsigned char rr; |
| unsigned char ts; |
| unsigned char is_strictroute:1, |
| srr_is_hit:1, |
| is_changed:1, |
| rr_needaddr:1, |
| ts_needtime:1, |
| ts_needaddr:1; |
| unsigned char router_alert; |
| unsigned char cipso; |
| unsigned char __pad2; |
| unsigned char __data[0]; |
| }; |
| |
| #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) |
| |
| struct inet_request_sock { |
| struct request_sock req; |
| #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| u16 inet6_rsk_offset; |
| /* 2 bytes hole, try to pack */ |
| #endif |
| __be32 loc_addr; |
| __be32 rmt_addr; |
| __be16 rmt_port; |
| u16 snd_wscale : 4, |
| rcv_wscale : 4, |
| tstamp_ok : 1, |
| sack_ok : 1, |
| wscale_ok : 1, |
| ecn_ok : 1, |
| acked : 1; |
| struct ip_options *opt; |
| }; |
| |
| static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) |
| { |
| return (struct inet_request_sock *)sk; |
| } |
| |
| struct ip_mc_socklist; |
| struct ipv6_pinfo; |
| struct rtable; |
| |
| /** struct inet_sock - representation of INET sockets |
| * |
| * @sk - ancestor class |
| * @pinet6 - pointer to IPv6 control block |
| * @daddr - Foreign IPv4 addr |
| * @rcv_saddr - Bound local IPv4 addr |
| * @dport - Destination port |
| * @num - Local port |
| * @saddr - Sending source |
| * @uc_ttl - Unicast TTL |
| * @sport - Source port |
| * @id - ID counter for DF pkts |
| * @tos - TOS |
| * @mc_ttl - Multicasting TTL |
| * @is_icsk - is this an inet_connection_sock? |
| * @mc_index - Multicast device index |
| * @mc_list - Group array |
| * @cork - info to build ip hdr on each ip frag while socket is corked |
| */ |
| struct inet_sock { |
| /* sk and pinet6 has to be the first two members of inet_sock */ |
| struct sock sk; |
| #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| struct ipv6_pinfo *pinet6; |
| #endif |
| /* Socket demultiplex comparisons on incoming packets. */ |
| __be32 daddr; |
| __be32 rcv_saddr; |
| __be16 dport; |
| __u16 num; |
| __be32 saddr; |
| __s16 uc_ttl; |
| __u16 cmsg_flags; |
| struct ip_options *opt; |
| __be16 sport; |
| __u16 id; |
| __u8 tos; |
| __u8 mc_ttl; |
| __u8 pmtudisc; |
| __u8 recverr:1, |
| is_icsk:1, |
| freebind:1, |
| hdrincl:1, |
| mc_loop:1, |
| transparent:1; |
| int mc_index; |
| __be32 mc_addr; |
| struct ip_mc_socklist *mc_list; |
| struct { |
| unsigned int flags; |
| unsigned int fragsize; |
| struct ip_options *opt; |
| struct dst_entry *dst; |
| int length; /* Total length of all frames */ |
| __be32 addr; |
| struct flowi fl; |
| } cork; |
| }; |
| |
| #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ |
| #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ |
| |
| static inline struct inet_sock *inet_sk(const struct sock *sk) |
| { |
| return (struct inet_sock *)sk; |
| } |
| |
| static inline void __inet_sk_copy_descendant(struct sock *sk_to, |
| const struct sock *sk_from, |
| const int ancestor_size) |
| { |
| memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, |
| sk_from->sk_prot->obj_size - ancestor_size); |
| } |
| #if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) |
| static inline void inet_sk_copy_descendant(struct sock *sk_to, |
| const struct sock *sk_from) |
| { |
| __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock)); |
| } |
| #endif |
| |
| extern int inet_sk_rebuild_header(struct sock *sk); |
| |
| extern u32 inet_ehash_secret; |
| extern void build_ehash_secret(void); |
| |
| static inline unsigned int inet_ehashfn(struct net *net, |
| const __be32 laddr, const __u16 lport, |
| const __be32 faddr, const __be16 fport) |
| { |
| return jhash_3words((__force __u32) laddr, |
| (__force __u32) faddr, |
| ((__u32) lport) << 16 | (__force __u32)fport, |
| inet_ehash_secret + net_hash_mix(net)); |
| } |
| |
| static inline int inet_sk_ehashfn(const struct sock *sk) |
| { |
| const struct inet_sock *inet = inet_sk(sk); |
| const __be32 laddr = inet->rcv_saddr; |
| const __u16 lport = inet->num; |
| const __be32 faddr = inet->daddr; |
| const __be16 fport = inet->dport; |
| struct net *net = sock_net(sk); |
| |
| return inet_ehashfn(net, laddr, lport, faddr, fport); |
| } |
| |
| static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops) |
| { |
| struct request_sock *req = reqsk_alloc(ops); |
| |
| if (req != NULL) |
| inet_rsk(req)->opt = NULL; |
| |
| return req; |
| } |
| |
| #endif /* _INET_SOCK_H */ |