diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_var.h')
| -rw-r--r-- | freebsd/sys/netinet/tcp_var.h | 277 |
1 files changed, 120 insertions, 157 deletions
diff --git a/freebsd/sys/netinet/tcp_var.h b/freebsd/sys/netinet/tcp_var.h index f4ea246b..5705e553 100644 --- a/freebsd/sys/netinet/tcp_var.h +++ b/freebsd/sys/netinet/tcp_var.h @@ -10,7 +10,7 @@ * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors + * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * @@ -39,15 +39,9 @@ #ifdef _KERNEL #include <net/vnet.h> #include <sys/mbuf.h> +#endif -/* - * Kernel variables for tcp. - */ -VNET_DECLARE(int, tcp_do_rfc1323); -#define V_tcp_do_rfc1323 VNET(tcp_do_rfc1323) - -#endif /* _KERNEL */ - +#if defined(_KERNEL) || defined(_WANT_TCPCB) /* TCP segment queue entry */ struct tseg_qent { LIST_ENTRY(tseg_qent) tqe_q; @@ -83,90 +77,12 @@ struct sackhint { uint64_t _pad[1]; /* TBD */ }; -struct tcptemp { - u_char tt_ipgen[40]; /* the size must be of max ip header, now IPv6 */ - struct tcphdr tt_t; -}; - -#define tcp6cb tcpcb /* for KAME src sync over BSD*'s */ - -/* - * TODO: We yet need to brave plowing in - * to tcp_input() and the pru_usrreq() block. - * Right now these go to the old standards which - * are somewhat ok, but in the long term may - * need to be changed. If we do tackle tcp_input() - * then we need to get rid of the tcp_do_segment() - * function below. - */ -/* Flags for tcp functions */ -#define TCP_FUNC_BEING_REMOVED 0x01 /* Can no longer be referenced */ -struct tcpcb; -struct inpcb; -struct sockopt; -struct socket; - -/* - * If defining the optional tcp_timers, in the - * tfb_tcp_timer_stop call you must use the - * callout_async_drain() function with the - * tcp_timer_discard callback. You should check - * the return of callout_async_drain() and if 0 - * increment tt_draincnt. Since the timer sub-system - * does not know your callbacks you must provide a - * stop_all function that loops through and calls - * tcp_timer_stop() with each of your defined timers. - * Adding a tfb_tcp_handoff_ok function allows the socket - * option to change stacks to query you even if the - * connection is in a later stage. You return 0 to - * say you can take over and run your stack, you return - * non-zero (an error number) to say no you can't. - * If the function is undefined you can only change - * in the early states (before connect or listen). - * tfb_tcp_fb_fini is changed to add a flag to tell - * the old stack if the tcb is being destroyed or - * not. A one in the flag means the TCB is being - * destroyed, a zero indicates its transitioning to - * another stack (via socket option). - */ -struct tcp_function_block { - char tfb_tcp_block_name[TCP_FUNCTION_NAME_LEN_MAX]; - int (*tfb_tcp_output)(struct tcpcb *); - void (*tfb_tcp_do_segment)(struct mbuf *, struct tcphdr *, - struct socket *, struct tcpcb *, - int, int, uint8_t, - int); - int (*tfb_tcp_ctloutput)(struct socket *so, struct sockopt *sopt, - struct inpcb *inp, struct tcpcb *tp); - /* Optional memory allocation/free routine */ - void (*tfb_tcp_fb_init)(struct tcpcb *); - void (*tfb_tcp_fb_fini)(struct tcpcb *, int); - /* Optional timers, must define all if you define one */ - int (*tfb_tcp_timer_stop_all)(struct tcpcb *); - void (*tfb_tcp_timer_activate)(struct tcpcb *, - uint32_t, u_int); - int (*tfb_tcp_timer_active)(struct tcpcb *, uint32_t); - void (*tfb_tcp_timer_stop)(struct tcpcb *, uint32_t); - void (*tfb_tcp_rexmit_tmr)(struct tcpcb *); - int (*tfb_tcp_handoff_ok)(struct tcpcb *); - volatile uint32_t tfb_refcnt; - uint32_t tfb_flags; -}; - -struct tcp_function { - TAILQ_ENTRY(tcp_function) tf_next; - struct tcp_function_block *tf_fb; -}; - -TAILQ_HEAD(tcp_funchead, tcp_function); - /* * Tcp control block, one per tcp; fields: * Organized for 16 byte cacheline efficiency. */ struct tcpcb { struct tsegqe_head t_segq; /* segment reassembly queue */ - void *t_pspare[2]; /* new reassembly queue */ int t_segqlen; /* segment reassembly queue length */ int t_dupacks; /* consecutive dup acks recd */ @@ -197,12 +113,10 @@ struct tcpcb { uint32_t snd_wnd; /* send window */ uint32_t snd_cwnd; /* congestion-controlled window */ - u_long snd_spare1; /* unused */ uint32_t snd_ssthresh; /* snd_cwnd size threshold for * for slow start exponential to * linear switch */ - u_long snd_spare2; /* unused */ tcp_seq snd_recover; /* for use in NewReno Fast Recovery */ u_int t_rcvtime; /* inactivity time */ @@ -210,9 +124,6 @@ struct tcpcb { u_int t_rtttime; /* RTT measurement start time */ tcp_seq t_rtseq; /* sequence number being timed */ - u_int t_bw_spare1; /* unused */ - tcp_seq t_bw_spare2; /* unused */ - int t_rxtcur; /* current retransmit value (ticks) */ u_int t_maxseg; /* maximum segment size */ u_int t_pmtud_saved_maxseg; /* pre-blackhole MSS */ @@ -276,33 +187,98 @@ struct tcpcb { u_int t_tsomaxsegcount; /* TSO maximum segment count */ u_int t_tsomaxsegsize; /* TSO maximum segment size in bytes */ u_int t_flags2; /* More tcpcb flags storage */ -#if defined(_KERNEL) && defined(TCP_RFC7413) - uint32_t t_ispare[6]; /* 5 UTO, 1 TBD */ - uint64_t t_tfo_cookie; /* TCP Fast Open cookie */ -#else - uint32_t t_ispare[8]; /* 5 UTO, 3 TBD */ -#endif struct tcp_function_block *t_fb;/* TCP function call block */ void *t_fb_ptr; /* Pointer to t_fb specific data */ -#if defined(_KERNEL) && defined(TCP_RFC7413) +#ifdef TCP_RFC7413 + uint64_t t_tfo_cookie; /* TCP Fast Open cookie */ unsigned int *t_tfo_pending; /* TCP Fast Open pending counter */ - void *t_pspare2[1]; /* 1 TCP_SIGNATURE */ -#else - void *t_pspare2[2]; /* 1 TCP_SIGNATURE, 1 TBD */ #endif -#if defined(_KERNEL) && defined(TCPPCAP) +#ifdef TCPPCAP struct mbufq t_inpkts; /* List of saved input packets. */ struct mbufq t_outpkts; /* List of saved output packets. */ -#ifdef _LP64 - uint64_t _pad[0]; /* all used! */ -#else - uint64_t _pad[2]; /* 2 are available */ -#endif /* _LP64 */ -#else - uint64_t _pad[6]; -#endif /* defined(_KERNEL) && defined(TCPPCAP) */ +#endif +}; +#endif /* _KERNEL || _WANT_TCPCB */ + +#ifdef _KERNEL +/* + * Kernel variables for tcp. + */ +VNET_DECLARE(int, tcp_do_rfc1323); +#define V_tcp_do_rfc1323 VNET(tcp_do_rfc1323) + +struct tcptemp { + u_char tt_ipgen[40]; /* the size must be of max ip header, now IPv6 */ + struct tcphdr tt_t; }; +/* + * TODO: We yet need to brave plowing in + * to tcp_input() and the pru_usrreq() block. + * Right now these go to the old standards which + * are somewhat ok, but in the long term may + * need to be changed. If we do tackle tcp_input() + * then we need to get rid of the tcp_do_segment() + * function below. + */ +/* Flags for tcp functions */ +#define TCP_FUNC_BEING_REMOVED 0x01 /* Can no longer be referenced */ + +/* + * If defining the optional tcp_timers, in the + * tfb_tcp_timer_stop call you must use the + * callout_async_drain() function with the + * tcp_timer_discard callback. You should check + * the return of callout_async_drain() and if 0 + * increment tt_draincnt. Since the timer sub-system + * does not know your callbacks you must provide a + * stop_all function that loops through and calls + * tcp_timer_stop() with each of your defined timers. + * Adding a tfb_tcp_handoff_ok function allows the socket + * option to change stacks to query you even if the + * connection is in a later stage. You return 0 to + * say you can take over and run your stack, you return + * non-zero (an error number) to say no you can't. + * If the function is undefined you can only change + * in the early states (before connect or listen). + * tfb_tcp_fb_fini is changed to add a flag to tell + * the old stack if the tcb is being destroyed or + * not. A one in the flag means the TCB is being + * destroyed, a zero indicates its transitioning to + * another stack (via socket option). + */ +struct tcp_function_block { + char tfb_tcp_block_name[TCP_FUNCTION_NAME_LEN_MAX]; + int (*tfb_tcp_output)(struct tcpcb *); + void (*tfb_tcp_do_segment)(struct mbuf *, struct tcphdr *, + struct socket *, struct tcpcb *, + int, int, uint8_t, + int); + int (*tfb_tcp_ctloutput)(struct socket *so, struct sockopt *sopt, + struct inpcb *inp, struct tcpcb *tp); + /* Optional memory allocation/free routine */ + void (*tfb_tcp_fb_init)(struct tcpcb *); + void (*tfb_tcp_fb_fini)(struct tcpcb *, int); + /* Optional timers, must define all if you define one */ + int (*tfb_tcp_timer_stop_all)(struct tcpcb *); + void (*tfb_tcp_timer_activate)(struct tcpcb *, + uint32_t, u_int); + int (*tfb_tcp_timer_active)(struct tcpcb *, uint32_t); + void (*tfb_tcp_timer_stop)(struct tcpcb *, uint32_t); + void (*tfb_tcp_rexmit_tmr)(struct tcpcb *); + int (*tfb_tcp_handoff_ok)(struct tcpcb *); + volatile uint32_t tfb_refcnt; + uint32_t tfb_flags; +}; + +struct tcp_function { + TAILQ_ENTRY(tcp_function) tf_next; + struct tcp_function_block *tf_fb; +}; + +TAILQ_HEAD(tcp_funchead, tcp_function); +#endif /* _KERNEL */ + /* * Flags and utility macros for the t_flags field. */ @@ -363,21 +339,6 @@ struct tcpcb { #define TCPOOB_HAVEDATA 0x01 #define TCPOOB_HADDATA 0x02 -#ifdef TCP_SIGNATURE -/* - * Defines which are needed by the xform_tcp module and tcp_[in|out]put - * for SADB verification and lookup. - */ -#define TCP_SIGLEN 16 /* length of computed digest in bytes */ -#define TCP_KEYLEN_MIN 1 /* minimum length of TCP-MD5 key */ -#define TCP_KEYLEN_MAX 80 /* maximum length of TCP-MD5 key */ -/* - * Only a single SA per host may be specified at this time. An SPI is - * needed in order for the KEY_ALLOCSA() lookup to work. - */ -#define TCP_SIG_SPI 0x1000 -#endif /* TCP_SIGNATURE */ - /* * Flags for PLPMTU handling, t_flags2 */ @@ -452,7 +413,7 @@ struct tcptw { tcp_seq iss; tcp_seq irs; u_short last_win; /* cached window value */ - u_short tw_so_options; /* copy of so_options */ + short tw_so_options; /* copy of so_options */ struct ucred *tw_cred; /* user credentials */ u_int32_t t_recent; u_int32_t ts_offset; /* our timestamp offset */ @@ -614,7 +575,7 @@ struct tcpstat { /* TCP_SIGNATURE related stats */ uint64_t tcps_sig_rcvgoodsig; /* Total matching signature received */ uint64_t tcps_sig_rcvbadsig; /* Total bad signature received */ - uint64_t tcps_sig_err_buildsig; /* Mismatching signature received */ + uint64_t tcps_sig_err_buildsig; /* Failed to make signature */ uint64_t tcps_sig_err_sigopt; /* No signature expected by socket */ uint64_t tcps_sig_err_nosigopt; /* No signature provided by segment */ @@ -671,26 +632,41 @@ struct tcp_hhook_data { /* * TCB structure exported to user-land via sysctl(3). + * + * Fields prefixed with "xt_" are unique to the export structure, and fields + * with "t_" or other prefixes match corresponding fields of 'struct tcpcb'. + * + * Legend: + * (s) - used by userland utilities in src + * (p) - used by utilities in ports + * (3) - is known to be used by third party software not in ports + * (n) - no known usage + * * Evil hack: declare only if in_pcb.h and sys/socketvar.h have been * included. Not all of our clients do. */ #if defined(_NETINET_IN_PCB_H_) && defined(_SYS_SOCKETVAR_H_) -struct xtcp_timer { - int tt_rexmt; /* retransmit timer */ - int tt_persist; /* retransmit persistence */ - int tt_keep; /* keepalive */ - int tt_2msl; /* 2*msl TIME_WAIT timer */ - int tt_delack; /* delayed ACK timer */ - int t_rcvtime; /* Time since last packet received */ -}; -struct xtcpcb { - size_t xt_len; - struct inpcb xt_inp; - struct tcpcb xt_tp; - struct xsocket xt_socket; - struct xtcp_timer xt_timer; - u_quad_t xt_alignment_hack; -}; +struct xtcpcb { + size_t xt_len; /* length of this structure */ + struct xinpcb xt_inp; + char xt_stack[TCP_FUNCTION_NAME_LEN_MAX]; /* (n) */ + int64_t spare64[8]; + int32_t t_state; /* (s,p) */ + uint32_t t_flags; /* (s,p) */ + int32_t t_sndzerowin; /* (s) */ + int32_t t_sndrexmitpack; /* (s) */ + int32_t t_rcvoopack; /* (s) */ + int32_t t_rcvtime; /* (s) */ + int32_t tt_rexmt; /* (s) */ + int32_t tt_persist; /* (s) */ + int32_t tt_keep; /* (s) */ + int32_t tt_2msl; /* (s) */ + int32_t tt_delack; /* (s) */ + int32_t spare32[32]; +} __aligned(8); +#ifdef _KERNEL +void tcp_inptoxtp(const struct inpcb *, struct xtcpcb *); +#endif #endif /* @@ -835,17 +811,6 @@ void tcp_tw_zone_change(void); int tcp_twcheck(struct inpcb *, struct tcpopt *, struct tcphdr *, struct mbuf *, int); void tcp_setpersist(struct tcpcb *); -#ifdef TCP_SIGNATURE -struct secasvar; -struct secasvar *tcp_get_sav(struct mbuf *, u_int); -int tcp_signature_do_compute(struct mbuf *, int, int, u_char *, - struct secasvar *); -int tcp_signature_compute(struct mbuf *, int, int, int, u_char *, u_int); -int tcp_signature_verify(struct mbuf *, int, int, int, struct tcpopt *, - struct tcphdr *, u_int); -int tcp_signature_check(struct mbuf *m, int off0, int tlen, int optlen, - struct tcpopt *to, struct tcphdr *th, u_int tcpbflag); -#endif void tcp_slowtimo(void); struct tcptemp * tcpip_maketemplate(struct inpcb *); @@ -889,7 +854,6 @@ tcp_fields_to_host(struct tcphdr *th) th->th_urp = ntohs(th->th_urp); } -#ifdef TCP_SIGNATURE static inline void tcp_fields_to_net(struct tcphdr *th) { @@ -899,7 +863,6 @@ tcp_fields_to_net(struct tcphdr *th) th->th_win = htons(th->th_win); th->th_urp = htons(th->th_urp); } -#endif #endif /* _KERNEL */ #endif /* _NETINET_TCP_VAR_H_ */ |