1 /* 2 * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 * 12 * @(#)spp_var.h 7.3 (Berkeley) 01/20/88 13 */ 14 15 /* 16 * Sp control block, one per connection 17 */ 18 struct sppcb { 19 struct spidp_q s_q; /* queue for out-of-order receipt */ 20 struct nspcb *s_nspcb; /* backpointer to internet pcb */ 21 u_char s_state; 22 u_char s_flags; 23 #define SF_ACKNOW 0x01 /* Ack peer immediately */ 24 #define SF_DELACK 0x02 /* Ack, but try to delay it */ 25 #define SF_HI 0x04 /* Show headers on input */ 26 #define SF_HO 0x08 /* Show headers on output */ 27 #define SF_PI 0x10 /* Packet (datagram) interface */ 28 #define SF_WIN 0x20 /* Window info changed */ 29 #define SF_RXT 0x40 /* Rxt info changed */ 30 #define SF_RVD 0x80 /* Calling from read usrreq routine */ 31 u_short s_mtu; /* Max packet size for this stream */ 32 /* use sequence fields in headers to store sequence numbers for this 33 connection */ 34 struct idp *s_idp; 35 struct sphdr s_shdr; /* prototype header to transmit */ 36 #define s_cc s_shdr.sp_cc /* connection control (for EM bit) */ 37 #define s_dt s_shdr.sp_dt /* datastream type */ 38 #define s_sid s_shdr.sp_sid /* source connection identifier */ 39 #define s_did s_shdr.sp_did /* destination connection identifier */ 40 #define s_seq s_shdr.sp_seq /* sequence number */ 41 #define s_ack s_shdr.sp_ack /* acknowledge number */ 42 #define s_alo s_shdr.sp_alo /* allocation number */ 43 #define s_dport s_idp->idp_dna.x_port /* where we are sending */ 44 struct sphdr s_rhdr; /* last received header (in effect!)*/ 45 u_short s_rack; /* their acknowledge number */ 46 u_short s_ralo; /* their allocation number */ 47 u_short s_smax; /* highest packet # we have sent */ 48 u_short s_snxt; /* which packet to send next */ 49 50 /* congestion control */ 51 #define CUNIT 1024 /* scaling for ... */ 52 int s_cwnd; /* Congestion-controlled window */ 53 /* in packets * CUNIT */ 54 short s_swnd; /* == tcp snd_wnd, in packets */ 55 short s_smxw; /* == tcp max_sndwnd */ 56 /* difference of two spp_seq's can be 57 no bigger than a short */ 58 u_short s_swl1; /* == tcp snd_wl1 */ 59 u_short s_swl2; /* == tcp snd_wl2 */ 60 int s_cwmx; /* max allowable cwnd */ 61 int s_ssthresh; /* s_cwnd size threshhold for 62 * slow start exponential-to- 63 * linear switch */ 64 /* transmit timing stuff 65 * srtt and rttvar are stored as fixed point, for convenience in smoothing. 66 * srtt has 3 bits to the right of the binary point, rttvar has 2. 67 */ 68 short s_idle; /* time idle */ 69 short s_timer[TCPT_NTIMERS]; /* timers */ 70 short s_rxtshift; /* log(2) of rexmt exp. backoff */ 71 short s_rxtcur; /* current retransmit value */ 72 u_short s_rtseq; /* packet being timed */ 73 short s_rtt; /* timer for round trips */ 74 short s_srtt; /* averaged timer */ 75 short s_rttvar; /* variance in round trip time */ 76 char s_force; /* which timer expired */ 77 char s_dupacks; /* counter to intuit xmt loss */ 78 79 /* out of band data */ 80 char s_oobflags; 81 #define SF_SOOB 0x08 /* sending out of band data */ 82 #define SF_IOOB 0x10 /* receiving out of band data */ 83 char s_iobc; /* input characters */ 84 /* debug stuff */ 85 u_short s_want; /* Last candidate for sending */ 86 char s_outx; /* exit taken from spp_output */ 87 char s_inx; /* exit taken from spp_input */ 88 }; 89 90 #define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb) 91 #define sotosppcb(so) (nstosppcb(sotonspcb(so))) 92 93 struct sppstat { 94 long spps_connattempt; /* connections initiated */ 95 long spps_accepts; /* connections accepted */ 96 long spps_connects; /* connections established */ 97 long spps_drops; /* connections dropped */ 98 long spps_conndrops; /* embryonic connections dropped */ 99 long spps_closed; /* conn. closed (includes drops) */ 100 long spps_segstimed; /* segs where we tried to get rtt */ 101 long spps_rttupdated; /* times we succeeded */ 102 long spps_delack; /* delayed acks sent */ 103 long spps_timeoutdrop; /* conn. dropped in rxmt timeout */ 104 long spps_rexmttimeo; /* retransmit timeouts */ 105 long spps_persisttimeo; /* persist timeouts */ 106 long spps_keeptimeo; /* keepalive timeouts */ 107 long spps_keepprobe; /* keepalive probes sent */ 108 long spps_keepdrops; /* connections dropped in keepalive */ 109 110 long spps_sndtotal; /* total packets sent */ 111 long spps_sndpack; /* data packets sent */ 112 long spps_sndbyte; /* data bytes sent */ 113 long spps_sndrexmitpack; /* data packets retransmitted */ 114 long spps_sndrexmitbyte; /* data bytes retransmitted */ 115 long spps_sndacks; /* ack-only packets sent */ 116 long spps_sndprobe; /* window probes sent */ 117 long spps_sndurg; /* packets sent with URG only */ 118 long spps_sndwinup; /* window update-only packets sent */ 119 long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */ 120 long spps_sndvoid; /* couldn't find requested packet*/ 121 122 long spps_rcvtotal; /* total packets received */ 123 long spps_rcvpack; /* packets received in sequence */ 124 long spps_rcvbyte; /* bytes received in sequence */ 125 long spps_rcvbadsum; /* packets received with ccksum errs */ 126 long spps_rcvbadoff; /* packets received with bad offset */ 127 long spps_rcvshort; /* packets received too short */ 128 long spps_rcvduppack; /* duplicate-only packets received */ 129 long spps_rcvdupbyte; /* duplicate-only bytes received */ 130 long spps_rcvpartduppack; /* packets with some duplicate data */ 131 long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */ 132 long spps_rcvoopack; /* out-of-order packets received */ 133 long spps_rcvoobyte; /* out-of-order bytes received */ 134 long spps_rcvpackafterwin; /* packets with data after window */ 135 long spps_rcvbyteafterwin; /* bytes rcvd after window */ 136 long spps_rcvafterclose; /* packets rcvd after "close" */ 137 long spps_rcvwinprobe; /* rcvd window probe packets */ 138 long spps_rcvdupack; /* rcvd duplicate acks */ 139 long spps_rcvacktoomuch; /* rcvd acks for unsent data */ 140 long spps_rcvackpack; /* rcvd ack packets */ 141 long spps_rcvackbyte; /* bytes acked by rcvd acks */ 142 long spps_rcvwinupd; /* rcvd window update packets */ 143 }; 144 struct spp_istat { 145 short hdrops; 146 short badsum; 147 short badlen; 148 short slotim; 149 short fastim; 150 short nonucn; 151 short noconn; 152 short notme; 153 short wrncon; 154 short bdreas; 155 short gonawy; 156 short notyet; 157 short lstdup; 158 struct sppstat newstats; 159 }; 160 161 #ifdef KERNEL 162 struct spp_istat spp_istat; 163 164 /* Following was struct sppstat sppstat; */ 165 #ifndef sppstat 166 #define sppstat spp_istat.newstats 167 #endif 168 169 u_short spp_iss; 170 extern struct sppcb *spp_close(), *spp_disconnect(), 171 *spp_usrclosed(), *spp_timers(), *spp_drop(); 172 #endif 173 174 #define SPP_ISSINCR 128 175 /* 176 * SPP sequence numbers are 16 bit integers operated 177 * on with modular arithmetic. These macros can be 178 * used to compare such integers. 179 */ 180 #ifdef sun 181 short xnsCbug; 182 #define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0) 183 #define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0) 184 #define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0) 185 #define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0) 186 #else 187 #define SSEQ_LT(a,b) (((short)((a)-(b))) < 0) 188 #define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0) 189 #define SSEQ_GT(a,b) (((short)((a)-(b))) > 0) 190 #define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0) 191 #endif 192