1 /* 2 * Copyright (c) 1988, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)terminal.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 #include <arpa/telnet.h> 13 #include <sys/types.h> 14 15 #include "ring.h" 16 17 #include "externs.h" 18 #include "types.h" 19 20 Ring ttyoring, ttyiring; 21 unsigned char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ]; 22 23 int termdata; /* Debugging flag */ 24 25 #ifdef USE_TERMIO 26 # ifndef VDISCARD 27 cc_t termFlushChar; 28 # endif 29 # ifndef VLNEXT 30 cc_t termLiteralNextChar; 31 # endif 32 # ifndef VSUSP 33 cc_t termSuspChar; 34 # endif 35 # ifndef VWERASE 36 cc_t termWerasChar; 37 # endif 38 # ifndef VREPRINT 39 cc_t termRprntChar; 40 # endif 41 # ifndef VSTART 42 cc_t termStartChar; 43 # endif 44 # ifndef VSTOP 45 cc_t termStopChar; 46 # endif 47 # ifndef VEOL 48 cc_t termForw1Char; 49 # endif 50 # ifndef VEOL2 51 cc_t termForw2Char; 52 # endif 53 # ifndef VSTATUS 54 cc_t termAytChar; 55 # endif 56 #else 57 cc_t termForw2Char; 58 cc_t termAytChar; 59 #endif 60 61 /* 62 * initialize the terminal data structures. 63 */ 64 65 void 66 init_terminal() 67 { 68 if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) { 69 exit(1); 70 } 71 if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) { 72 exit(1); 73 } 74 autoflush = TerminalAutoFlush(); 75 } 76 77 78 /* 79 * Send as much data as possible to the terminal. 80 * 81 * Return value: 82 * -1: No useful work done, data waiting to go out. 83 * 0: No data was waiting, so nothing was done. 84 * 1: All waiting data was written out. 85 * n: All data - n was written out. 86 */ 87 88 89 int 90 ttyflush(drop) 91 int drop; 92 { 93 register int n, n0, n1; 94 95 n0 = ring_full_count(&ttyoring); 96 if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) { 97 if (drop) { 98 TerminalFlushOutput(); 99 /* we leave 'n' alone! */ 100 } else { 101 n = TerminalWrite(ttyoring.consume, n); 102 } 103 } 104 if (n > 0) { 105 if (termdata && n) { 106 Dump('>', ttyoring.consume, n); 107 } 108 /* 109 * If we wrote everything, and the full count is 110 * larger than what we wrote, then write the 111 * rest of the buffer. 112 */ 113 if (n1 == n && n0 > n) { 114 n1 = n0 - n; 115 if (!drop) 116 n1 = TerminalWrite(ttyoring.bottom, n1); 117 n += n1; 118 } 119 ring_consumed(&ttyoring, n); 120 } 121 if (n < 0) 122 return -1; 123 if (n == n0) { 124 if (n0) 125 return -1; 126 return 0; 127 } 128 return n0 - n + 1; 129 } 130 131 132 /* 133 * These routines decides on what the mode should be (based on the values 134 * of various global variables). 135 */ 136 137 138 int 139 getconnmode() 140 { 141 extern int linemode; 142 int mode = 0; 143 #ifdef KLUDGELINEMODE 144 extern int kludgelinemode; 145 #endif 146 147 if (In3270) 148 return(MODE_FLOW); 149 150 if (my_want_state_is_dont(TELOPT_ECHO)) 151 mode |= MODE_ECHO; 152 153 if (localflow) 154 mode |= MODE_FLOW; 155 156 if (my_want_state_is_will(TELOPT_BINARY)) 157 mode |= MODE_INBIN; 158 159 if (his_want_state_is_will(TELOPT_BINARY)) 160 mode |= MODE_OUTBIN; 161 162 #ifdef KLUDGELINEMODE 163 if (kludgelinemode) { 164 if (my_want_state_is_dont(TELOPT_SGA)) { 165 mode |= (MODE_TRAPSIG|MODE_EDIT); 166 if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { 167 mode &= ~MODE_ECHO; 168 } 169 } 170 return(mode); 171 } 172 #endif 173 if (my_want_state_is_will(TELOPT_LINEMODE)) 174 mode |= linemode; 175 return(mode); 176 } 177 178 void 179 setconnmode(force) 180 int force; 181 { 182 #ifdef ENCRYPTION 183 static int enc_passwd = 0; 184 #endif /* ENCRYPTION */ 185 register int newmode; 186 187 newmode = getconnmode()|(force?MODE_FORCE:0); 188 189 TerminalNewMode(newmode); 190 191 #ifdef ENCRYPTION 192 if ((newmode & (MODE_ECHO|MODE_EDIT)) == MODE_EDIT) { 193 if (my_want_state_is_will(TELOPT_ENCRYPT) 194 && (enc_passwd == 0) && !encrypt_output) { 195 encrypt_request_start(0, 0); 196 enc_passwd = 1; 197 } 198 } else { 199 if (enc_passwd) { 200 encrypt_request_end(); 201 enc_passwd = 0; 202 } 203 } 204 #endif /* ENCRYPTION */ 205 206 } 207 208 209 void 210 setcommandmode() 211 { 212 TerminalNewMode(-1); 213 } 214