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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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463c84b97f
This creates struct inet_connection_sock, moving members out of struct tcp_sock that are shareable with other INET connection oriented protocols, such as DCCP, that in my private tree already uses most of these members. The functions that operate on these members were renamed, using a inet_csk_ prefix while not being moved yet to a new file, so as to ease the review of these changes. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
375 lines
8.1 KiB
C
375 lines
8.1 KiB
C
#ifndef _IPV6_H
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#define _IPV6_H
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#include <linux/config.h>
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#include <linux/in6.h>
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#include <asm/byteorder.h>
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/* The latest drafts declared increase in minimal mtu up to 1280. */
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#define IPV6_MIN_MTU 1280
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/*
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* Advanced API
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* source interface/address selection, source routing, etc...
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* *under construction*
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*/
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struct in6_pktinfo {
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struct in6_addr ipi6_addr;
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int ipi6_ifindex;
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};
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struct in6_ifreq {
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struct in6_addr ifr6_addr;
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__u32 ifr6_prefixlen;
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int ifr6_ifindex;
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};
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#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
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#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
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/*
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* routing header
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*/
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struct ipv6_rt_hdr {
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__u8 nexthdr;
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__u8 hdrlen;
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__u8 type;
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__u8 segments_left;
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/*
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* type specific data
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* variable length field
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*/
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};
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struct ipv6_opt_hdr {
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__u8 nexthdr;
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__u8 hdrlen;
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/*
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* TLV encoded option data follows.
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*/
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};
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#define ipv6_destopt_hdr ipv6_opt_hdr
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#define ipv6_hopopt_hdr ipv6_opt_hdr
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#ifdef __KERNEL__
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#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
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#endif
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/*
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* routing header type 0 (used in cmsghdr struct)
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*/
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struct rt0_hdr {
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struct ipv6_rt_hdr rt_hdr;
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__u32 bitmap; /* strict/loose bit map */
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struct in6_addr addr[0];
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#define rt0_type rt_hdr.type
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};
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struct ipv6_auth_hdr {
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__u8 nexthdr;
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__u8 hdrlen; /* This one is measured in 32 bit units! */
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__u16 reserved;
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__u32 spi;
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__u32 seq_no; /* Sequence number */
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__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
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};
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struct ipv6_esp_hdr {
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__u32 spi;
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__u32 seq_no; /* Sequence number */
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__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
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};
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struct ipv6_comp_hdr {
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__u8 nexthdr;
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__u8 flags;
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__u16 cpi;
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};
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/*
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* IPv6 fixed header
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*
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* BEWARE, it is incorrect. The first 4 bits of flow_lbl
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* are glued to priority now, forming "class".
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*/
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struct ipv6hdr {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 priority:4,
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version:4;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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__u8 version:4,
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priority:4;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__u8 flow_lbl[3];
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__u16 payload_len;
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__u8 nexthdr;
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__u8 hop_limit;
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struct in6_addr saddr;
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struct in6_addr daddr;
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};
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/*
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* This structure contains configuration options per IPv6 link.
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*/
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struct ipv6_devconf {
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__s32 forwarding;
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__s32 hop_limit;
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__s32 mtu6;
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__s32 accept_ra;
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__s32 accept_redirects;
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__s32 autoconf;
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__s32 dad_transmits;
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__s32 rtr_solicits;
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__s32 rtr_solicit_interval;
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__s32 rtr_solicit_delay;
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__s32 force_mld_version;
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#ifdef CONFIG_IPV6_PRIVACY
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__s32 use_tempaddr;
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__s32 temp_valid_lft;
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__s32 temp_prefered_lft;
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__s32 regen_max_retry;
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__s32 max_desync_factor;
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#endif
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__s32 max_addresses;
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void *sysctl;
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};
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/* index values for the variables in ipv6_devconf */
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enum {
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DEVCONF_FORWARDING = 0,
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DEVCONF_HOPLIMIT,
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DEVCONF_MTU6,
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DEVCONF_ACCEPT_RA,
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DEVCONF_ACCEPT_REDIRECTS,
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DEVCONF_AUTOCONF,
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DEVCONF_DAD_TRANSMITS,
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DEVCONF_RTR_SOLICITS,
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DEVCONF_RTR_SOLICIT_INTERVAL,
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DEVCONF_RTR_SOLICIT_DELAY,
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DEVCONF_USE_TEMPADDR,
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DEVCONF_TEMP_VALID_LFT,
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DEVCONF_TEMP_PREFERED_LFT,
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DEVCONF_REGEN_MAX_RETRY,
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DEVCONF_MAX_DESYNC_FACTOR,
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DEVCONF_MAX_ADDRESSES,
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DEVCONF_FORCE_MLD_VERSION,
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DEVCONF_MAX
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};
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#ifdef __KERNEL__
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#include <linux/in6.h> /* struct sockaddr_in6 */
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#include <linux/icmpv6.h>
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#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
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#include <linux/tcp.h>
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#include <linux/udp.h>
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/*
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This structure contains results of exthdrs parsing
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as offsets from skb->nh.
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*/
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struct inet6_skb_parm {
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int iif;
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__u16 ra;
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__u16 hop;
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__u16 dst0;
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__u16 srcrt;
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__u16 dst1;
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};
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#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
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struct tcp6_request_sock {
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struct tcp_request_sock req;
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struct in6_addr loc_addr;
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struct in6_addr rmt_addr;
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struct sk_buff *pktopts;
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int iif;
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};
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static inline struct tcp6_request_sock *tcp6_rsk(const struct request_sock *sk)
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{
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return (struct tcp6_request_sock *)sk;
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}
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/**
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* struct ipv6_pinfo - ipv6 private area
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*
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* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
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* this _must_ be the last member, so that inet6_sk_generic
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* is able to calculate its offset from the base struct sock
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* by using the struct proto->slab_obj_size member. -acme
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*/
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struct ipv6_pinfo {
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struct in6_addr saddr;
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struct in6_addr rcv_saddr;
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struct in6_addr daddr;
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struct in6_addr *daddr_cache;
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__u32 flow_label;
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__u32 frag_size;
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__s16 hop_limit;
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__s16 mcast_hops;
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int mcast_oif;
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/* pktoption flags */
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union {
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struct {
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__u8 srcrt:2,
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rxinfo:1,
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rxhlim:1,
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hopopts:1,
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dstopts:1,
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rxflow:1;
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} bits;
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__u8 all;
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} rxopt;
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/* sockopt flags */
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__u8 mc_loop:1,
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recverr:1,
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sndflow:1,
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pmtudisc:2,
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ipv6only:1;
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__u32 dst_cookie;
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struct ipv6_mc_socklist *ipv6_mc_list;
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struct ipv6_ac_socklist *ipv6_ac_list;
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struct ipv6_fl_socklist *ipv6_fl_list;
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struct ipv6_txoptions *opt;
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struct sk_buff *pktoptions;
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struct {
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struct ipv6_txoptions *opt;
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struct rt6_info *rt;
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int hop_limit;
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} cork;
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};
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/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
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struct raw6_sock {
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/* inet_sock has to be the first member of raw6_sock */
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struct inet_sock inet;
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__u32 checksum; /* perform checksum */
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__u32 offset; /* checksum offset */
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struct icmp6_filter filter;
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/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
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struct ipv6_pinfo inet6;
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};
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struct udp6_sock {
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struct udp_sock udp;
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/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
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struct ipv6_pinfo inet6;
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};
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struct tcp6_sock {
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struct tcp_sock tcp;
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/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
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struct ipv6_pinfo inet6;
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};
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
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{
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return inet_sk(__sk)->pinet6;
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}
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static inline struct raw6_sock *raw6_sk(const struct sock *sk)
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{
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return (struct raw6_sock *)sk;
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}
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static inline void inet_sk_copy_descendant(struct sock *sk_to,
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const struct sock *sk_from)
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{
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int ancestor_size = sizeof(struct inet_sock);
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if (sk_from->sk_family == PF_INET6)
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ancestor_size += sizeof(struct ipv6_pinfo);
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__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
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}
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#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
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#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
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#include <linux/tcp.h>
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struct tcp6_timewait_sock {
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struct tcp_timewait_sock tw_v6_sk;
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struct in6_addr tw_v6_daddr;
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struct in6_addr tw_v6_rcv_saddr;
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};
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static inline struct tcp6_timewait_sock *tcp6_twsk(const struct sock *sk)
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{
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return (struct tcp6_timewait_sock *)sk;
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}
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static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
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{
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return likely(sk->sk_state != TCP_TIME_WAIT) ?
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&inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr;
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}
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static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
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{
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return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
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}
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static inline int inet_twsk_ipv6only(const struct sock *sk)
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{
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return inet_twsk(sk)->tw_ipv6only;
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}
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static inline int inet_v6_ipv6only(const struct sock *sk)
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{
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return likely(sk->sk_state != TCP_TIME_WAIT) ?
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ipv6_only_sock(sk) : inet_twsk_ipv6only(sk);
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}
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#else
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#define __ipv6_only_sock(sk) 0
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#define ipv6_only_sock(sk) 0
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static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
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{
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return NULL;
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}
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static inline struct raw6_sock *raw6_sk(const struct sock *sk)
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{
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return NULL;
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}
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#define __tcp_v6_rcv_saddr(__sk) NULL
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#define tcp_v6_rcv_saddr(__sk) NULL
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#define tcp_twsk_ipv6only(__sk) 0
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#define inet_v6_ipv6only(__sk) 0
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#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
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#define INET6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \
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(((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
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((__sk)->sk_family == AF_INET6) && \
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ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
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ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
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(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
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#endif /* __KERNEL__ */
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#endif /* _IPV6_H */
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