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 the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)spp_var.h 7.5 (Berkeley) 06/29/88 18 */ 19 20 /* 21 * Sp control block, one per connection 22 */ 23 struct sppcb { 24 struct spidp_q s_q; /* queue for out-of-order receipt */ 25 struct nspcb *s_nspcb; /* backpointer to internet pcb */ 26 u_char s_state; 27 u_char s_flags; 28 #define SF_ACKNOW 0x01 /* Ack peer immediately */ 29 #define SF_DELACK 0x02 /* Ack, but try to delay it */ 30 #define SF_HI 0x04 /* Show headers on input */ 31 #define SF_HO 0x08 /* Show headers on output */ 32 #define SF_PI 0x10 /* Packet (datagram) interface */ 33 #define SF_WIN 0x20 /* Window info changed */ 34 #define SF_RXT 0x40 /* Rxt info changed */ 35 #define SF_RVD 0x80 /* Calling from read usrreq routine */ 36 u_short s_mtu; /* Max packet size for this stream */ 37 /* use sequence fields in headers to store sequence numbers for this 38 connection */ 39 struct idp *s_idp; 40 struct sphdr s_shdr; /* prototype header to transmit */ 41 #define s_cc s_shdr.sp_cc /* connection control (for EM bit) */ 42 #define s_dt s_shdr.sp_dt /* datastream type */ 43 #define s_sid s_shdr.sp_sid /* source connection identifier */ 44 #define s_did s_shdr.sp_did /* destination connection identifier */ 45 #define s_seq s_shdr.sp_seq /* sequence number */ 46 #define s_ack s_shdr.sp_ack /* acknowledge number */ 47 #define s_alo s_shdr.sp_alo /* allocation number */ 48 #define s_dport s_idp->idp_dna.x_port /* where we are sending */ 49 struct sphdr s_rhdr; /* last received header (in effect!)*/ 50 u_short s_rack; /* their acknowledge number */ 51 u_short s_ralo; /* their allocation number */ 52 u_short s_smax; /* highest packet # we have sent */ 53 u_short s_snxt; /* which packet to send next */ 54 55 /* congestion control */ 56 #define CUNIT 1024 /* scaling for ... */ 57 int s_cwnd; /* Congestion-controlled window */ 58 /* in packets * CUNIT */ 59 short s_swnd; /* == tcp snd_wnd, in packets */ 60 short s_smxw; /* == tcp max_sndwnd */ 61 /* difference of two spp_seq's can be 62 no bigger than a short */ 63 u_short s_swl1; /* == tcp snd_wl1 */ 64 u_short s_swl2; /* == tcp snd_wl2 */ 65 int s_cwmx; /* max allowable cwnd */ 66 int s_ssthresh; /* s_cwnd size threshhold for 67 * slow start exponential-to- 68 * linear switch */ 69 /* transmit timing stuff 70 * srtt and rttvar are stored as fixed point, for convenience in smoothing. 71 * srtt has 3 bits to the right of the binary point, rttvar has 2. 72 */ 73 short s_idle; /* time idle */ 74 short s_timer[SPPT_NTIMERS]; /* timers */ 75 short s_rxtshift; /* log(2) of rexmt exp. backoff */ 76 short s_rxtcur; /* current retransmit value */ 77 u_short s_rtseq; /* packet being timed */ 78 short s_rtt; /* timer for round trips */ 79 short s_srtt; /* averaged timer */ 80 short s_rttvar; /* variance in round trip time */ 81 char s_force; /* which timer expired */ 82 char s_dupacks; /* counter to intuit xmt loss */ 83 84 /* out of band data */ 85 char s_oobflags; 86 #define SF_SOOB 0x08 /* sending out of band data */ 87 #define SF_IOOB 0x10 /* receiving out of band data */ 88 char s_iobc; /* input characters */ 89 /* debug stuff */ 90 u_short s_want; /* Last candidate for sending */ 91 char s_outx; /* exit taken from spp_output */ 92 char s_inx; /* exit taken from spp_input */ 93 }; 94 95 #define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb) 96 #define sotosppcb(so) (nstosppcb(sotonspcb(so))) 97 98 struct sppstat { 99 long spps_connattempt; /* connections initiated */ 100 long spps_accepts; /* connections accepted */ 101 long spps_connects; /* connections established */ 102 long spps_drops; /* connections dropped */ 103 long spps_conndrops; /* embryonic connections dropped */ 104 long spps_closed; /* conn. closed (includes drops) */ 105 long spps_segstimed; /* segs where we tried to get rtt */ 106 long spps_rttupdated; /* times we succeeded */ 107 long spps_delack; /* delayed acks sent */ 108 long spps_timeoutdrop; /* conn. dropped in rxmt timeout */ 109 long spps_rexmttimeo; /* retransmit timeouts */ 110 long spps_persisttimeo; /* persist timeouts */ 111 long spps_keeptimeo; /* keepalive timeouts */ 112 long spps_keepprobe; /* keepalive probes sent */ 113 long spps_keepdrops; /* connections dropped in keepalive */ 114 115 long spps_sndtotal; /* total packets sent */ 116 long spps_sndpack; /* data packets sent */ 117 long spps_sndbyte; /* data bytes sent */ 118 long spps_sndrexmitpack; /* data packets retransmitted */ 119 long spps_sndrexmitbyte; /* data bytes retransmitted */ 120 long spps_sndacks; /* ack-only packets sent */ 121 long spps_sndprobe; /* window probes sent */ 122 long spps_sndurg; /* packets sent with URG only */ 123 long spps_sndwinup; /* window update-only packets sent */ 124 long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */ 125 long spps_sndvoid; /* couldn't find requested packet*/ 126 127 long spps_rcvtotal; /* total packets received */ 128 long spps_rcvpack; /* packets received in sequence */ 129 long spps_rcvbyte; /* bytes received in sequence */ 130 long spps_rcvbadsum; /* packets received with ccksum errs */ 131 long spps_rcvbadoff; /* packets received with bad offset */ 132 long spps_rcvshort; /* packets received too short */ 133 long spps_rcvduppack; /* duplicate-only packets received */ 134 long spps_rcvdupbyte; /* duplicate-only bytes received */ 135 long spps_rcvpartduppack; /* packets with some duplicate data */ 136 long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */ 137 long spps_rcvoopack; /* out-of-order packets received */ 138 long spps_rcvoobyte; /* out-of-order bytes received */ 139 long spps_rcvpackafterwin; /* packets with data after window */ 140 long spps_rcvbyteafterwin; /* bytes rcvd after window */ 141 long spps_rcvafterclose; /* packets rcvd after "close" */ 142 long spps_rcvwinprobe; /* rcvd window probe packets */ 143 long spps_rcvdupack; /* rcvd duplicate acks */ 144 long spps_rcvacktoomuch; /* rcvd acks for unsent data */ 145 long spps_rcvackpack; /* rcvd ack packets */ 146 long spps_rcvackbyte; /* bytes acked by rcvd acks */ 147 long spps_rcvwinupd; /* rcvd window update packets */ 148 }; 149 struct spp_istat { 150 short hdrops; 151 short badsum; 152 short badlen; 153 short slotim; 154 short fastim; 155 short nonucn; 156 short noconn; 157 short notme; 158 short wrncon; 159 short bdreas; 160 short gonawy; 161 short notyet; 162 short lstdup; 163 struct sppstat newstats; 164 }; 165 166 #ifdef KERNEL 167 struct spp_istat spp_istat; 168 169 /* Following was struct sppstat sppstat; */ 170 #ifndef sppstat 171 #define sppstat spp_istat.newstats 172 #endif 173 174 u_short spp_iss; 175 extern struct sppcb *spp_close(), *spp_disconnect(), 176 *spp_usrclosed(), *spp_timers(), *spp_drop(); 177 #endif 178 179 #define SPP_ISSINCR 128 180 /* 181 * SPP sequence numbers are 16 bit integers operated 182 * on with modular arithmetic. These macros can be 183 * used to compare such integers. 184 */ 185 #ifdef sun 186 short xnsCbug; 187 #define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0) 188 #define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0) 189 #define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0) 190 #define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0) 191 #else 192 #define SSEQ_LT(a,b) (((short)((a)-(b))) < 0) 193 #define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0) 194 #define SSEQ_GT(a,b) (((short)((a)-(b))) > 0) 195 #define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0) 196 #endif 197