diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/tcp.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/tcp.h | 505 |
1 files changed, 0 insertions, 505 deletions
diff --git a/ANDROID_3.4.5/include/linux/tcp.h b/ANDROID_3.4.5/include/linux/tcp.h deleted file mode 100644 index b6c62d29..00000000 --- a/ANDROID_3.4.5/include/linux/tcp.h +++ /dev/null @@ -1,505 +0,0 @@ -/* - * 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 TCP protocol. - * - * Version: @(#)tcp.h 1.0.2 04/28/93 - * - * 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. - */ -#ifndef _LINUX_TCP_H -#define _LINUX_TCP_H - -#include <linux/types.h> -#include <asm/byteorder.h> -#include <linux/socket.h> - -struct tcphdr { - __be16 source; - __be16 dest; - __be32 seq; - __be32 ack_seq; -#if defined(__LITTLE_ENDIAN_BITFIELD) - __u16 res1:4, - doff:4, - fin:1, - syn:1, - rst:1, - psh:1, - ack:1, - urg:1, - ece:1, - cwr:1; -#elif defined(__BIG_ENDIAN_BITFIELD) - __u16 doff:4, - res1:4, - cwr:1, - ece:1, - urg:1, - ack:1, - psh:1, - rst:1, - syn:1, - fin:1; -#else -#error "Adjust your <asm/byteorder.h> defines" -#endif - __be16 window; - __sum16 check; - __be16 urg_ptr; -}; - -/* - * The union cast uses a gcc extension to avoid aliasing problems - * (union is compatible to any of its members) - * This means this part of the code is -fstrict-aliasing safe now. - */ -union tcp_word_hdr { - struct tcphdr hdr; - __be32 words[5]; -}; - -#define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3]) - -enum { - TCP_FLAG_CWR = __cpu_to_be32(0x00800000), - TCP_FLAG_ECE = __cpu_to_be32(0x00400000), - TCP_FLAG_URG = __cpu_to_be32(0x00200000), - TCP_FLAG_ACK = __cpu_to_be32(0x00100000), - TCP_FLAG_PSH = __cpu_to_be32(0x00080000), - TCP_FLAG_RST = __cpu_to_be32(0x00040000), - TCP_FLAG_SYN = __cpu_to_be32(0x00020000), - TCP_FLAG_FIN = __cpu_to_be32(0x00010000), - TCP_RESERVED_BITS = __cpu_to_be32(0x0F000000), - TCP_DATA_OFFSET = __cpu_to_be32(0xF0000000) -}; - -/* - * TCP general constants - */ -#define TCP_MSS_DEFAULT 536U /* IPv4 (RFC1122, RFC2581) */ -#define TCP_MSS_DESIRED 1220U /* IPv6 (tunneled), EDNS0 (RFC3226) */ - -/* TCP socket options */ -#define TCP_NODELAY 1 /* Turn off Nagle's algorithm. */ -#define TCP_MAXSEG 2 /* Limit MSS */ -#define TCP_CORK 3 /* Never send partially complete segments */ -#define TCP_KEEPIDLE 4 /* Start keeplives after this period */ -#define TCP_KEEPINTVL 5 /* Interval between keepalives */ -#define TCP_KEEPCNT 6 /* Number of keepalives before death */ -#define TCP_SYNCNT 7 /* Number of SYN retransmits */ -#define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */ -#define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */ -#define TCP_WINDOW_CLAMP 10 /* Bound advertised window */ -#define TCP_INFO 11 /* Information about this connection. */ -#define TCP_QUICKACK 12 /* Block/reenable quick acks */ -#define TCP_CONGESTION 13 /* Congestion control algorithm */ -#define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */ -#define TCP_COOKIE_TRANSACTIONS 15 /* TCP Cookie Transactions */ -#define TCP_THIN_LINEAR_TIMEOUTS 16 /* Use linear timeouts for thin streams*/ -#define TCP_THIN_DUPACK 17 /* Fast retrans. after 1 dupack */ -#define TCP_USER_TIMEOUT 18 /* How long for loss retry before timeout */ - -/* for TCP_INFO socket option */ -#define TCPI_OPT_TIMESTAMPS 1 -#define TCPI_OPT_SACK 2 -#define TCPI_OPT_WSCALE 4 -#define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ -#define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ - -enum tcp_ca_state { - TCP_CA_Open = 0, -#define TCPF_CA_Open (1<<TCP_CA_Open) - TCP_CA_Disorder = 1, -#define TCPF_CA_Disorder (1<<TCP_CA_Disorder) - TCP_CA_CWR = 2, -#define TCPF_CA_CWR (1<<TCP_CA_CWR) - TCP_CA_Recovery = 3, -#define TCPF_CA_Recovery (1<<TCP_CA_Recovery) - TCP_CA_Loss = 4 -#define TCPF_CA_Loss (1<<TCP_CA_Loss) -}; - -struct tcp_info { - __u8 tcpi_state; - __u8 tcpi_ca_state; - __u8 tcpi_retransmits; - __u8 tcpi_probes; - __u8 tcpi_backoff; - __u8 tcpi_options; - __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; - - __u32 tcpi_rto; - __u32 tcpi_ato; - __u32 tcpi_snd_mss; - __u32 tcpi_rcv_mss; - - __u32 tcpi_unacked; - __u32 tcpi_sacked; - __u32 tcpi_lost; - __u32 tcpi_retrans; - __u32 tcpi_fackets; - - /* Times. */ - __u32 tcpi_last_data_sent; - __u32 tcpi_last_ack_sent; /* Not remembered, sorry. */ - __u32 tcpi_last_data_recv; - __u32 tcpi_last_ack_recv; - - /* Metrics. */ - __u32 tcpi_pmtu; - __u32 tcpi_rcv_ssthresh; - __u32 tcpi_rtt; - __u32 tcpi_rttvar; - __u32 tcpi_snd_ssthresh; - __u32 tcpi_snd_cwnd; - __u32 tcpi_advmss; - __u32 tcpi_reordering; - - __u32 tcpi_rcv_rtt; - __u32 tcpi_rcv_space; - - __u32 tcpi_total_retrans; -}; - -/* for TCP_MD5SIG socket option */ -#define TCP_MD5SIG_MAXKEYLEN 80 - -struct tcp_md5sig { - struct __kernel_sockaddr_storage tcpm_addr; /* address associated */ - __u16 __tcpm_pad1; /* zero */ - __u16 tcpm_keylen; /* key length */ - __u32 __tcpm_pad2; /* zero */ - __u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* key (binary) */ -}; - -/* for TCP_COOKIE_TRANSACTIONS (TCPCT) socket option */ -#define TCP_COOKIE_MIN 8 /* 64-bits */ -#define TCP_COOKIE_MAX 16 /* 128-bits */ -#define TCP_COOKIE_PAIR_SIZE (2*TCP_COOKIE_MAX) - -/* Flags for both getsockopt and setsockopt */ -#define TCP_COOKIE_IN_ALWAYS (1 << 0) /* Discard SYN without cookie */ -#define TCP_COOKIE_OUT_NEVER (1 << 1) /* Prohibit outgoing cookies, - * supercedes everything. */ - -/* Flags for getsockopt */ -#define TCP_S_DATA_IN (1 << 2) /* Was data received? */ -#define TCP_S_DATA_OUT (1 << 3) /* Was data sent? */ - -/* TCP_COOKIE_TRANSACTIONS data */ -struct tcp_cookie_transactions { - __u16 tcpct_flags; /* see above */ - __u8 __tcpct_pad1; /* zero */ - __u8 tcpct_cookie_desired; /* bytes */ - __u16 tcpct_s_data_desired; /* bytes of variable data */ - __u16 tcpct_used; /* bytes in value */ - __u8 tcpct_value[TCP_MSS_DEFAULT]; -}; - -#ifdef __KERNEL__ - -#include <linux/skbuff.h> -#include <linux/dmaengine.h> -#include <net/sock.h> -#include <net/inet_connection_sock.h> -#include <net/inet_timewait_sock.h> - -static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb) -{ - return (struct tcphdr *)skb_transport_header(skb); -} - -static inline unsigned int tcp_hdrlen(const struct sk_buff *skb) -{ - return tcp_hdr(skb)->doff * 4; -} - -static inline unsigned int tcp_optlen(const struct sk_buff *skb) -{ - return (tcp_hdr(skb)->doff - 5) * 4; -} - -/* This defines a selective acknowledgement block. */ -struct tcp_sack_block_wire { - __be32 start_seq; - __be32 end_seq; -}; - -struct tcp_sack_block { - u32 start_seq; - u32 end_seq; -}; - -/*These are used to set the sack_ok field in struct tcp_options_received */ -#define TCP_SACK_SEEN (1 << 0) /*1 = peer is SACK capable, */ -#define TCP_FACK_ENABLED (1 << 1) /*1 = FACK is enabled locally*/ -#define TCP_DSACK_SEEN (1 << 2) /*1 = DSACK was received from peer*/ - -struct tcp_options_received { -/* PAWS/RTTM data */ - long ts_recent_stamp;/* Time we stored ts_recent (for aging) */ - u32 ts_recent; /* Time stamp to echo next */ - u32 rcv_tsval; /* Time stamp value */ - u32 rcv_tsecr; /* Time stamp echo reply */ - u16 saw_tstamp : 1, /* Saw TIMESTAMP on last packet */ - tstamp_ok : 1, /* TIMESTAMP seen on SYN packet */ - dsack : 1, /* D-SACK is scheduled */ - wscale_ok : 1, /* Wscale seen on SYN packet */ - sack_ok : 4, /* SACK seen on SYN packet */ - snd_wscale : 4, /* Window scaling received from sender */ - rcv_wscale : 4; /* Window scaling to send to receiver */ - u8 cookie_plus:6, /* bytes in authenticator/cookie option */ - cookie_out_never:1, - cookie_in_always:1; - u8 num_sacks; /* Number of SACK blocks */ - u16 user_mss; /* mss requested by user in ioctl */ - u16 mss_clamp; /* Maximal mss, negotiated at connection setup */ -}; - -static inline void tcp_clear_options(struct tcp_options_received *rx_opt) -{ - rx_opt->tstamp_ok = rx_opt->sack_ok = 0; - rx_opt->wscale_ok = rx_opt->snd_wscale = 0; - rx_opt->cookie_plus = 0; -} - -/* This is the max number of SACKS that we'll generate and process. It's safe - * to increase this, although since: - * size = TCPOLEN_SACK_BASE_ALIGNED (4) + n * TCPOLEN_SACK_PERBLOCK (8) - * only four options will fit in a standard TCP header */ -#define TCP_NUM_SACKS 4 - -struct tcp_cookie_values; -struct tcp_request_sock_ops; - -struct tcp_request_sock { - struct inet_request_sock req; -#ifdef CONFIG_TCP_MD5SIG - /* Only used by TCP MD5 Signature so far. */ - const struct tcp_request_sock_ops *af_specific; -#endif - u32 rcv_isn; - u32 snt_isn; - u32 snt_synack; /* synack sent time */ -}; - -static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req) -{ - return (struct tcp_request_sock *)req; -} - -struct tcp_sock { - /* inet_connection_sock has to be the first member of tcp_sock */ - struct inet_connection_sock inet_conn; - u16 tcp_header_len; /* Bytes of tcp header to send */ - u16 xmit_size_goal_segs; /* Goal for segmenting output packets */ - -/* - * Header prediction flags - * 0x5?10 << 16 + snd_wnd in net byte order - */ - __be32 pred_flags; - -/* - * RFC793 variables by their proper names. This means you can - * read the code and the spec side by side (and laugh ...) - * See RFC793 and RFC1122. The RFC writes these in capitals. - */ - u32 rcv_nxt; /* What we want to receive next */ - u32 copied_seq; /* Head of yet unread data */ - u32 rcv_wup; /* rcv_nxt on last window update sent */ - u32 snd_nxt; /* Next sequence we send */ - - u32 snd_una; /* First byte we want an ack for */ - u32 snd_sml; /* Last byte of the most recently transmitted small packet */ - u32 rcv_tstamp; /* timestamp of last received ACK (for keepalives) */ - u32 lsndtime; /* timestamp of last sent data packet (for restart window) */ - - /* Data for direct copy to user */ - struct { - struct sk_buff_head prequeue; - struct task_struct *task; - struct iovec *iov; - int memory; - int len; -#ifdef CONFIG_NET_DMA - /* members for async copy */ - struct dma_chan *dma_chan; - int wakeup; - struct dma_pinned_list *pinned_list; - dma_cookie_t dma_cookie; -#endif - } ucopy; - - u32 snd_wl1; /* Sequence for window update */ - u32 snd_wnd; /* The window we expect to receive */ - u32 max_window; /* Maximal window ever seen from peer */ - u32 mss_cache; /* Cached effective mss, not including SACKS */ - - u32 window_clamp; /* Maximal window to advertise */ - u32 rcv_ssthresh; /* Current window clamp */ - - u32 frto_highmark; /* snd_nxt when RTO occurred */ - u16 advmss; /* Advertised MSS */ - u8 frto_counter; /* Number of new acks after RTO */ - u8 nonagle : 4,/* Disable Nagle algorithm? */ - thin_lto : 1,/* Use linear timeouts for thin streams */ - thin_dupack : 1,/* Fast retransmit on first dupack */ - unused : 2; - -/* RTT measurement */ - u32 srtt; /* smoothed round trip time << 3 */ - u32 mdev; /* medium deviation */ - u32 mdev_max; /* maximal mdev for the last rtt period */ - u32 rttvar; /* smoothed mdev_max */ - u32 rtt_seq; /* sequence number to update rttvar */ - - u32 packets_out; /* Packets which are "in flight" */ - u32 retrans_out; /* Retransmitted packets out */ - - u16 urg_data; /* Saved octet of OOB data and control flags */ - u8 ecn_flags; /* ECN status bits. */ - u8 reordering; /* Packet reordering metric. */ - u32 snd_up; /* Urgent pointer */ - - u8 keepalive_probes; /* num of allowed keep alive probes */ -/* - * Options received (usually on last packet, some only on SYN packets). - */ - struct tcp_options_received rx_opt; - -/* - * Slow start and congestion control (see also Nagle, and Karn & Partridge) - */ - u32 snd_ssthresh; /* Slow start size threshold */ - u32 snd_cwnd; /* Sending congestion window */ - u32 snd_cwnd_cnt; /* Linear increase counter */ - u32 snd_cwnd_clamp; /* Do not allow snd_cwnd to grow above this */ - u32 snd_cwnd_used; - u32 snd_cwnd_stamp; - u32 prior_cwnd; /* Congestion window at start of Recovery. */ - u32 prr_delivered; /* Number of newly delivered packets to - * receiver in Recovery. */ - u32 prr_out; /* Total number of pkts sent during Recovery. */ - - u32 rcv_wnd; /* Current receiver window */ - u32 write_seq; /* Tail(+1) of data held in tcp send buffer */ - u32 pushed_seq; /* Last pushed seq, required to talk to windows */ - u32 lost_out; /* Lost packets */ - u32 sacked_out; /* SACK'd packets */ - u32 fackets_out; /* FACK'd packets */ - u32 tso_deferred; - u32 bytes_acked; /* Appropriate Byte Counting - RFC3465 */ - - /* from STCP, retrans queue hinting */ - struct sk_buff* lost_skb_hint; - struct sk_buff *scoreboard_skb_hint; - struct sk_buff *retransmit_skb_hint; - - struct sk_buff_head out_of_order_queue; /* Out of order segments go here */ - - /* SACKs data, these 2 need to be together (see tcp_build_and_update_options) */ - struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */ - struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/ - - struct tcp_sack_block recv_sack_cache[4]; - - struct sk_buff *highest_sack; /* skb just after the highest - * skb with SACKed bit set - * (validity guaranteed only if - * sacked_out > 0) - */ - - int lost_cnt_hint; - u32 retransmit_high; /* L-bits may be on up to this seqno */ - - u32 lost_retrans_low; /* Sent seq after any rxmit (lowest) */ - - u32 prior_ssthresh; /* ssthresh saved at recovery start */ - u32 high_seq; /* snd_nxt at onset of congestion */ - - u32 retrans_stamp; /* Timestamp of the last retransmit, - * also used in SYN-SENT to remember stamp of - * the first SYN. */ - u32 undo_marker; /* tracking retrans started here. */ - int undo_retrans; /* number of undoable retransmissions. */ - u32 total_retrans; /* Total retransmits for entire connection */ - - u32 urg_seq; /* Seq of received urgent pointer */ - unsigned int keepalive_time; /* time before keep alive takes place */ - unsigned int keepalive_intvl; /* time interval between keep alive probes */ - - int linger2; - -/* Receiver side RTT estimation */ - struct { - u32 rtt; - u32 seq; - u32 time; - } rcv_rtt_est; - -/* Receiver queue space */ - struct { - int space; - u32 seq; - u32 time; - } rcvq_space; - -/* TCP-specific MTU probe information. */ - struct { - u32 probe_seq_start; - u32 probe_seq_end; - } mtu_probe; - -#ifdef CONFIG_TCP_MD5SIG -/* TCP AF-Specific parts; only used by MD5 Signature support so far */ - const struct tcp_sock_af_ops *af_specific; - -/* TCP MD5 Signature Option information */ - struct tcp_md5sig_info __rcu *md5sig_info; -#endif - - /* When the cookie options are generated and exchanged, then this - * object holds a reference to them (cookie_values->kref). Also - * contains related tcp_cookie_transactions fields. - */ - struct tcp_cookie_values *cookie_values; -}; - -static inline struct tcp_sock *tcp_sk(const struct sock *sk) -{ - return (struct tcp_sock *)sk; -} - -struct tcp_timewait_sock { - struct inet_timewait_sock tw_sk; - u32 tw_rcv_nxt; - u32 tw_snd_nxt; - u32 tw_rcv_wnd; - u32 tw_ts_recent; - long tw_ts_recent_stamp; -#ifdef CONFIG_TCP_MD5SIG - struct tcp_md5sig_key *tw_md5_key; -#endif - /* Few sockets in timewait have cookies; in that case, then this - * object holds a reference to them (tw_cookie_values->kref). - */ - struct tcp_cookie_values *tw_cookie_values; -}; - -static inline struct tcp_timewait_sock *tcp_twsk(const struct sock *sk) -{ - return (struct tcp_timewait_sock *)sk; -} - -#endif /* __KERNEL__ */ - -#endif /* _LINUX_TCP_H */ |