projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8ae0e4b4 | 1 | /* |
| 79b7ed8c | 2 | * Copyright (c) 1984, 1985 Regents of the University of California. |
| 8ae0e4b4 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | * | |
| 79b7ed8c | 6 | * @(#)spp_var.h 6.4 (Berkeley) %G% |
| 8ae0e4b4 | 7 | */ |
| cbf839b6 KS |
8 | |
| 9 | /* | |
| 10 | * Sp control block, one per connection | |
| 11 | */ | |
| 12 | struct sppcb { | |
| 13 | struct spidp_q s_q; /* queue for out-of-order receipt */ | |
| 14 | struct nspcb *s_nspcb; /* backpointer to internet pcb */ | |
| 15 | u_char s_state; | |
| 16 | u_char s_flags; | |
| 17 | #define SF_AK 0x01 /* Acknowledgement requested */ | |
| 18 | #define SF_DELACK 0x02 /* Ak, waiting to see if we xmit*/ | |
| 19 | #define SF_HI 0x04 /* Show headers on input */ | |
| 20 | #define SF_HO 0x08 /* Show headers on output */ | |
| 21 | #define SF_PI 0x10 /* Packet (datagram) interface */ | |
| 22 | u_short s_mtu; /* Max packet size for this stream */ | |
| 23 | /* use sequence fields in headers to store sequence numbers for this | |
| 24 | connection */ | |
| 25 | struct spidp s_shdr; /* prototype header to transmit */ | |
| 26 | #define s_cc s_shdr.si_cc /* connection control (for EM bit) */ | |
| 27 | #define s_dt s_shdr.si_dt /* datastream type */ | |
| 28 | #define s_sid s_shdr.si_sid /* source connection identifier */ | |
| 29 | #define s_did s_shdr.si_did /* destination connection identifier */ | |
| 30 | #define s_seq s_shdr.si_seq /* sequence number */ | |
| 31 | #define s_ack s_shdr.si_ack /* acknowledge number */ | |
| 32 | #define s_alo s_shdr.si_alo /* allocation number */ | |
| 33 | #define s_dport s_shdr.si_dna.x_port /* where we are sending */ | |
| 34 | struct sphdr s_rhdr; /* last received header (in effect!)*/ | |
| 35 | u_short s_rack; /* their acknowledge number */ | |
| 36 | u_short s_ralo; /* their allocation number */ | |
| 37 | u_short s_snt; /* highest packet # we have sent */ | |
| 38 | ||
| 39 | /* timeout stuff */ | |
| 40 | short s_idle; /* time idle */ | |
| 41 | short s_timer[TCPT_NTIMERS]; /* timers */ | |
| 42 | short s_rxtshift; /* log(2) of rexmt exp. backoff */ | |
| 43 | u_short s_rtseq; /* packet being timed */ | |
| 44 | short s_rtt; /* timer for round trips */ | |
| 45 | short s_srtt; /* averaged timer */ | |
| 46 | char s_force; /* which timer expired */ | |
| 47 | ||
| 48 | /* out of band data */ | |
| 49 | char s_oobflags; | |
| 50 | #define SF_SOOB 0x08 /* sending out of band data */ | |
| 51 | #define SF_IOOB 0x10 /* receiving out of band data */ | |
| 52 | char s_iobc; /* input characters */ | |
| 53 | /* debug stuff */ | |
| 54 | u_short s_want; /* Last candidate for sending */ | |
| 55 | }; | |
| 56 | ||
| 57 | #define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb) | |
| 58 | #define sotosppcb(so) (nstosppcb(sotonspcb(so))) | |
| 59 | ||
| 60 | struct spp_istat { | |
| 61 | short hdrops; | |
| 62 | short badsum; | |
| 63 | short badlen; | |
| 64 | short slotim; | |
| 65 | short fastim; | |
| 66 | short nonucn; | |
| 67 | short noconn; | |
| 68 | short notme; | |
| 69 | short wrncon; | |
| 70 | short bdreas; | |
| 71 | short gonawy; | |
| f1f25520 KS |
72 | short notyet; |
| 73 | short lstdup; | |
| cbf839b6 KS |
74 | }; |
| 75 | ||
| 76 | #ifdef KERNEL | |
| 77 | struct spp_istat spp_istat; | |
| 78 | u_short spp_iss; | |
| 79 | extern struct sppcb *spp_close(), *spp_disconnect(), | |
| 80 | *spp_usrclosed(), *spp_timers(), *spp_drop(); | |
| 81 | #endif | |
| 82 | ||
| 83 | #define SPP_ISSINCR 128 | |
| 84 | /* | |
| 85 | * SPP sequence numbers are 16 bit integers operated | |
| 86 | * on with modular arithmetic. These macros can be | |
| 87 | * used to compare such integers. | |
| 88 | */ | |
| 89 | #define SSEQ_LT(a,b) (((short)((a)-(b))) < 0) | |
| 90 | #define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0) | |
| 91 | #define SSEQ_GT(a,b) (((short)((a)-(b))) > 0) | |
| 92 | #define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0) |