| 1 | /* sim_tmxr.c: Telnet terminal multiplexor library\r |
| 2 | \r |
| 3 | Copyright (c) 2001-2007, Robert M Supnik\r |
| 4 | \r |
| 5 | Permission is hereby granted, free of charge, to any person obtaining a\r |
| 6 | copy of this software and associated documentation files (the "Software"),\r |
| 7 | to deal in the Software without restriction, including without limitation\r |
| 8 | the rights to use, copy, modify, merge, publish, distribute, sublicense,\r |
| 9 | and/or sell copies of the Software, and to permit persons to whom the\r |
| 10 | Software is furnished to do so, subject to the following conditions:\r |
| 11 | \r |
| 12 | The above copyright notice and this permission notice shall be included in\r |
| 13 | all copies or substantial portions of the Software.\r |
| 14 | \r |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r |
| 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r |
| 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r |
| 18 | ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r |
| 19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r |
| 20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r |
| 21 | \r |
| 22 | Except as contained in this notice, the name of Robert M Supnik shall not be\r |
| 23 | used in advertising or otherwise to promote the sale, use or other dealings\r |
| 24 | in this Software without prior written authorization from Robert M Supnik.\r |
| 25 | \r |
| 26 | Based on the original DZ11 simulator by Thord Nilson, as updated by\r |
| 27 | Arthur Krewat.\r |
| 28 | \r |
| 29 | 11-Apr-07 JDB Worked around Telnet negotiation problem with QCTerm\r |
| 30 | 16-Aug-05 RMS Fixed C++ declaration and cast problems\r |
| 31 | 29-Jun-05 RMS Extended tmxr_dscln to support unit array devices\r |
| 32 | Fixed bug in SET LOG/NOLOG\r |
| 33 | 04-Jan-04 RMS Changed TMXR ldsc to be pointer to linedesc array\r |
| 34 | Added tmxr_linemsg, circular output pointers, logging\r |
| 35 | (from Mark Pizzolato)\r |
| 36 | 29-Dec-03 RMS Added output stall support\r |
| 37 | 01-Nov-03 RMS Cleaned up attach routine\r |
| 38 | 09-Mar-03 RMS Fixed bug in SHOW CONN\r |
| 39 | 22-Dec-02 RMS Fixed bugs in IAC+IAC receive and transmit sequences\r |
| 40 | Added support for received break (all from by Mark Pizzolato)\r |
| 41 | Fixed bug in attach\r |
| 42 | 31-Oct-02 RMS Fixed bug in 8b (binary) support\r |
| 43 | 22-Aug-02 RMS Added tmxr_open_master, tmxr_close_master\r |
| 44 | 30-Dec-01 RMS Added tmxr_fstats, tmxr_dscln, renamed tmxr_fstatus\r |
| 45 | 03-Dec-01 RMS Changed tmxr_fconns for extended SET/SHOW\r |
| 46 | 20-Oct-01 RMS Fixed bugs in read logic (found by Thord Nilson).\r |
| 47 | Added tmxr_rqln, tmxr_tqln\r |
| 48 | \r |
| 49 | This library includes:\r |
| 50 | \r |
| 51 | tmxr_poll_conn - poll for connection\r |
| 52 | tmxr_reset_ln - reset line\r |
| 53 | tmxr_getc_ln - get character for line\r |
| 54 | tmxr_poll_rx - poll receive\r |
| 55 | tmxr_putc_ln - put character for line\r |
| 56 | tmxr_poll_tx - poll transmit\r |
| 57 | tmxr_open_master - open master connection\r |
| 58 | tmxr_close_master - close master connection\r |
| 59 | tmxr_attach - attach terminal multiplexor\r |
| 60 | tmxr_detach - detach terminal multiplexor\r |
| 61 | tmxr_ex - (null) examine\r |
| 62 | tmxr_dep - (null) deposit\r |
| 63 | tmxr_msg - send message to socket\r |
| 64 | tmxr_linemsg - send message to line\r |
| 65 | tmxr_fconns - output connection status\r |
| 66 | tmxr_fstats - output connection statistics\r |
| 67 | tmxr_dscln - disconnect line (SET routine)\r |
| 68 | tmxr_rqln - number of available characters for line\r |
| 69 | tmxr_tqln - number of buffered characters for line\r |
| 70 | \r |
| 71 | All routines are OS-independent.\r |
| 72 | */\r |
| 73 | \r |
| 74 | #include "sim_defs.h"\r |
| 75 | #include "sim_sock.h"\r |
| 76 | #include "sim_tmxr.h"\r |
| 77 | #include <ctype.h>\r |
| 78 | \r |
| 79 | /* Telnet protocol constants - negatives are for init'ing signed char data */\r |
| 80 | \r |
| 81 | #define TN_IAC -1 /* protocol delim */\r |
| 82 | #define TN_DONT -2 /* dont */\r |
| 83 | #define TN_DO -3 /* do */\r |
| 84 | #define TN_WONT -4 /* wont */\r |
| 85 | #define TN_WILL -5 /* will */\r |
| 86 | #define TN_BRK -13 /* break */\r |
| 87 | #define TN_BIN 0 /* bin */\r |
| 88 | #define TN_ECHO 1 /* echo */\r |
| 89 | #define TN_SGA 3 /* sga */\r |
| 90 | #define TN_LINE 34 /* line mode */\r |
| 91 | #define TN_CR 015 /* carriage return */\r |
| 92 | #define TN_LF 012 /* line feed */\r |
| 93 | #define TN_NUL 000 /* null */\r |
| 94 | \r |
| 95 | /* Telnet line states */\r |
| 96 | \r |
| 97 | #define TNS_NORM 000 /* normal */\r |
| 98 | #define TNS_IAC 001 /* IAC seen */\r |
| 99 | #define TNS_WILL 002 /* WILL seen */\r |
| 100 | #define TNS_WONT 003 /* WONT seen */\r |
| 101 | #define TNS_SKIP 004 /* skip next cmd */\r |
| 102 | #define TNS_CRPAD 005 /* CR padding */\r |
| 103 | \r |
| 104 | void tmxr_rmvrc (TMLN *lp, int32 p);\r |
| 105 | int32 tmxr_send_buffered_data (TMLN *lp);\r |
| 106 | TMLN *tmxr_find_ldsc (UNIT *uptr, int32 val, TMXR *mp);\r |
| 107 | \r |
| 108 | extern int32 sim_switches;\r |
| 109 | extern char sim_name[];\r |
| 110 | extern FILE *sim_log;\r |
| 111 | extern uint32 sim_os_msec (void);\r |
| 112 | \r |
| 113 | /* Poll for new connection\r |
| 114 | \r |
| 115 | Called from unit service routine to test for new connection\r |
| 116 | \r |
| 117 | Inputs:\r |
| 118 | *mp = pointer to terminal multiplexor descriptor\r |
| 119 | Outputs:\r |
| 120 | line number activated, -1 if none\r |
| 121 | */\r |
| 122 | \r |
| 123 | int32 tmxr_poll_conn (TMXR *mp)\r |
| 124 | {\r |
| 125 | SOCKET newsock;\r |
| 126 | TMLN *lp;\r |
| 127 | int32 i;\r |
| 128 | uint32 ipaddr;\r |
| 129 | static char mantra[] = {\r |
| 130 | TN_IAC, TN_WILL, TN_LINE,\r |
| 131 | TN_IAC, TN_WILL, TN_SGA,\r |
| 132 | TN_IAC, TN_WILL, TN_ECHO,\r |
| 133 | TN_IAC, TN_WILL, TN_BIN,\r |
| 134 | TN_IAC, TN_DO, TN_BIN\r |
| 135 | };\r |
| 136 | \r |
| 137 | newsock = sim_accept_conn (mp->master, &ipaddr); /* poll connect */\r |
| 138 | if (newsock != INVALID_SOCKET) { /* got a live one? */\r |
| 139 | for (i = 0; i < mp->lines; i++) { /* find avail line */\r |
| 140 | lp = mp->ldsc + i; /* ptr to ln desc */\r |
| 141 | if (lp->conn == 0) break; /* available? */\r |
| 142 | }\r |
| 143 | if (i >= mp->lines) { /* all busy? */\r |
| 144 | tmxr_msg (newsock, "All connections busy\r\n");\r |
| 145 | sim_close_sock (newsock, 0);\r |
| 146 | }\r |
| 147 | else {\r |
| 148 | lp = mp->ldsc + i; /* get line desc */\r |
| 149 | lp->conn = newsock; /* record connection */\r |
| 150 | lp->ipad = ipaddr; /* ip address */\r |
| 151 | lp->cnms = sim_os_msec (); /* time of conn */\r |
| 152 | lp->rxbpr = lp->rxbpi = 0; /* init buf pointers */\r |
| 153 | lp->txbpr = lp->txbpi = 0;\r |
| 154 | lp->rxcnt = lp->txcnt = 0; /* init counters */\r |
| 155 | lp->tsta = 0; /* init telnet state */\r |
| 156 | lp->xmte = 1; /* enable transmit */\r |
| 157 | lp->dstb = 0; /* default bin mode */\r |
| 158 | sim_write_sock (newsock, mantra, 15);\r |
| 159 | tmxr_linemsg (lp, "\n\r\nConnected to the ");\r |
| 160 | tmxr_linemsg (lp, sim_name);\r |
| 161 | tmxr_linemsg (lp, " simulator\r\n\n");\r |
| 162 | tmxr_poll_tx (mp); /* flush output */\r |
| 163 | return i;\r |
| 164 | }\r |
| 165 | } /* end if newsock */\r |
| 166 | return -1;\r |
| 167 | }\r |
| 168 | \r |
| 169 | /* Reset line */\r |
| 170 | \r |
| 171 | void tmxr_reset_ln (TMLN *lp)\r |
| 172 | {\r |
| 173 | if (lp->txlog) fflush (lp->txlog); /* dump log */\r |
| 174 | tmxr_send_buffered_data (lp); /* send buffered data */\r |
| 175 | sim_close_sock (lp->conn, 0); /* reset conn */\r |
| 176 | lp->conn = lp->tsta = 0; /* reset state */\r |
| 177 | lp->rxbpr = lp->rxbpi = 0;\r |
| 178 | lp->txbpr = lp->txbpi = 0;\r |
| 179 | lp->xmte = 1;\r |
| 180 | lp->dstb = 0;\r |
| 181 | return;\r |
| 182 | }\r |
| 183 | \r |
| 184 | /* Get character from specific line\r |
| 185 | \r |
| 186 | Inputs:\r |
| 187 | *lp = pointer to terminal line descriptor\r |
| 188 | Output:\r |
| 189 | valid + char, 0 if line\r |
| 190 | */\r |
| 191 | \r |
| 192 | int32 tmxr_getc_ln (TMLN *lp)\r |
| 193 | {\r |
| 194 | int32 j, val = 0;\r |
| 195 | uint32 tmp;\r |
| 196 | \r |
| 197 | if (lp->conn && lp->rcve) { /* conn & enb? */\r |
| 198 | j = lp->rxbpi - lp->rxbpr; /* # input chrs */\r |
| 199 | if (j) { /* any? */\r |
| 200 | tmp = lp->rxb[lp->rxbpr]; /* get char */\r |
| 201 | val = TMXR_VALID | (tmp & 0377); /* valid + chr */\r |
| 202 | if (lp->rbr[lp->rxbpr]) val = val | SCPE_BREAK; /* break? */\r |
| 203 | lp->rxbpr = lp->rxbpr + 1; /* adv pointer */\r |
| 204 | }\r |
| 205 | } /* end if conn */\r |
| 206 | if (lp->rxbpi == lp->rxbpr) /* empty? zero ptrs */\r |
| 207 | lp->rxbpi = lp->rxbpr = 0;\r |
| 208 | return val;\r |
| 209 | }\r |
| 210 | \r |
| 211 | /* Poll for input\r |
| 212 | \r |
| 213 | Inputs:\r |
| 214 | *mp = pointer to terminal multiplexor descriptor\r |
| 215 | Outputs: none\r |
| 216 | */\r |
| 217 | \r |
| 218 | void tmxr_poll_rx (TMXR *mp)\r |
| 219 | {\r |
| 220 | int32 i, nbytes, j;\r |
| 221 | TMLN *lp;\r |
| 222 | \r |
| 223 | for (i = 0; i < mp->lines; i++) { /* loop thru lines */\r |
| 224 | lp = mp->ldsc + i; /* get line desc */\r |
| 225 | if (!lp->conn || !lp->rcve) continue; /* skip if !conn */\r |
| 226 | \r |
| 227 | nbytes = 0;\r |
| 228 | if (lp->rxbpi == 0) /* need input? */\r |
| 229 | nbytes = sim_read_sock (lp->conn, /* yes, read */\r |
| 230 | &(lp->rxb[lp->rxbpi]), /* leave spc for */\r |
| 231 | TMXR_MAXBUF - TMXR_GUARD); /* Telnet cruft */\r |
| 232 | else if (lp->tsta) /* in Telnet seq? */\r |
| 233 | nbytes = sim_read_sock (lp->conn, /* yes, read to end */\r |
| 234 | &(lp->rxb[lp->rxbpi]),\r |
| 235 | TMXR_MAXBUF - lp->rxbpi);\r |
| 236 | if (nbytes < 0) tmxr_reset_ln (lp); /* closed? reset ln */\r |
| 237 | else if (nbytes > 0) { /* if data rcvd */\r |
| 238 | j = lp->rxbpi; /* start of data */\r |
| 239 | memset (&lp->rbr[j], 0, nbytes); /* clear status */\r |
| 240 | lp->rxbpi = lp->rxbpi + nbytes; /* adv pointers */\r |
| 241 | lp->rxcnt = lp->rxcnt + nbytes;\r |
| 242 | \r |
| 243 | /* Examine new data, remove TELNET cruft before making input available */\r |
| 244 | \r |
| 245 | for (; j < lp->rxbpi; ) { /* loop thru char */\r |
| 246 | signed char tmp = lp->rxb[j]; /* get char */\r |
| 247 | switch (lp->tsta) { /* case tlnt state */\r |
| 248 | \r |
| 249 | case TNS_NORM: /* normal */\r |
| 250 | if (tmp == TN_IAC) { /* IAC? */\r |
| 251 | lp->tsta = TNS_IAC; /* change state */\r |
| 252 | tmxr_rmvrc (lp, j); /* remove char */\r |
| 253 | break;\r |
| 254 | }\r |
| 255 | if ((tmp == TN_CR) && lp->dstb) /* CR, no bin */\r |
| 256 | lp->tsta = TNS_CRPAD; /* skip pad char */\r |
| 257 | j = j + 1; /* advance j */\r |
| 258 | break;\r |
| 259 | \r |
| 260 | case TNS_IAC: /* IAC prev */\r |
| 261 | if ((tmp == TN_IAC) & !lp->dstb) { /* IAC + IAC, bin? */\r |
| 262 | lp->tsta = TNS_NORM; /* treat as normal */\r |
| 263 | j = j + 1; /* advance j */\r |
| 264 | break; /* keep IAC */\r |
| 265 | }\r |
| 266 | if (tmp == TN_BRK) { /* IAC + BRK? */\r |
| 267 | lp->tsta = TNS_NORM; /* treat as normal */\r |
| 268 | lp->rxb[j] = 0; /* char is null */\r |
| 269 | lp->rbr[j] = 1; /* flag break */\r |
| 270 | j = j + 1; /* advance j */\r |
| 271 | break;\r |
| 272 | }\r |
| 273 | if (tmp == TN_WILL) /* IAC + WILL? */\r |
| 274 | lp->tsta = TNS_WILL;\r |
| 275 | else if (tmp == TN_WONT) /* IAC + WONT? */\r |
| 276 | lp->tsta = TNS_WONT;\r |
| 277 | else lp->tsta = TNS_SKIP; /* IAC + other */\r |
| 278 | tmxr_rmvrc (lp, j); /* remove char */\r |
| 279 | break;\r |
| 280 | \r |
| 281 | case TNS_WILL: case TNS_WONT: /* IAC+WILL/WONT prev */\r |
| 282 | if (tmp == TN_BIN) { /* BIN? */\r |
| 283 | if (lp->tsta == TNS_WILL) lp->dstb = 0;\r |
| 284 | else lp->dstb = 1;\r |
| 285 | }\r |
| 286 | \r |
| 287 | /* Negotiation with the HP terminal emulator "QCTerm" is not working.\r |
| 288 | QCTerm says "WONT BIN" but sends bare CRs. RFC 854 says:\r |
| 289 | \r |
| 290 | Note that "CR LF" or "CR NUL" is required in both directions\r |
| 291 | (in the default ASCII mode), to preserve the symmetry of the\r |
| 292 | NVT model. ...The protocol requires that a NUL be inserted\r |
| 293 | following a CR not followed by a LF in the data stream.\r |
| 294 | \r |
| 295 | Until full negotiation is implemented, we work around the problem\r |
| 296 | by checking the character following the CR in non-BIN mode and\r |
| 297 | strip it only if it is LF or NUL. This should not affect\r |
| 298 | conforming clients.\r |
| 299 | */\r |
| 300 | \r |
| 301 | case TNS_CRPAD: /* only LF or NUL should follow CR */\r |
| 302 | lp->tsta = TNS_NORM; /* next normal */\r |
| 303 | if ((tmp == TN_LF) || /* CR + LF ? */\r |
| 304 | (tmp == TN_NUL)) /* CR + NUL? */\r |
| 305 | tmxr_rmvrc (lp, j); /* remove it */\r |
| 306 | break;\r |
| 307 | \r |
| 308 | case TNS_SKIP: default: /* skip char */\r |
| 309 | lp->tsta = TNS_NORM; /* next normal */\r |
| 310 | tmxr_rmvrc (lp, j); /* remove char */\r |
| 311 | break;\r |
| 312 | } /* end case state */\r |
| 313 | } /* end for char */\r |
| 314 | } /* end else nbytes */\r |
| 315 | } /* end for lines */\r |
| 316 | for (i = 0; i < mp->lines; i++) { /* loop thru lines */\r |
| 317 | lp = mp->ldsc + i; /* get line desc */\r |
| 318 | if (lp->rxbpi == lp->rxbpr) /* if buf empty, */\r |
| 319 | lp->rxbpi = lp->rxbpr = 0; /* reset pointers */\r |
| 320 | } /* end for */\r |
| 321 | return;\r |
| 322 | }\r |
| 323 | \r |
| 324 | /* Return count of available characters for line */\r |
| 325 | \r |
| 326 | int32 tmxr_rqln (TMLN *lp)\r |
| 327 | {\r |
| 328 | return (lp->rxbpi - lp->rxbpr);\r |
| 329 | }\r |
| 330 | \r |
| 331 | /* Remove character p (and matching status) from line l input buffer */\r |
| 332 | \r |
| 333 | void tmxr_rmvrc (TMLN *lp, int32 p)\r |
| 334 | {\r |
| 335 | for ( ; p < lp->rxbpi; p++) {\r |
| 336 | lp->rxb[p] = lp->rxb[p + 1];\r |
| 337 | lp->rbr[p] = lp->rbr[p + 1];\r |
| 338 | }\r |
| 339 | lp->rxbpi = lp->rxbpi - 1;\r |
| 340 | return;\r |
| 341 | }\r |
| 342 | \r |
| 343 | /* Store character in line buffer\r |
| 344 | \r |
| 345 | Inputs:\r |
| 346 | *lp = pointer to line descriptor\r |
| 347 | chr = characters\r |
| 348 | Outputs:\r |
| 349 | status = ok, connection lost, or stall\r |
| 350 | */\r |
| 351 | \r |
| 352 | t_stat tmxr_putc_ln (TMLN *lp, int32 chr)\r |
| 353 | {\r |
| 354 | if (lp->txlog) fputc (chr, lp->txlog); /* log if available */\r |
| 355 | if (lp->conn == 0) return SCPE_LOST; /* no conn? lost */\r |
| 356 | if (tmxr_tqln (lp) < (TMXR_MAXBUF - 1)) { /* room for char (+ IAC)? */\r |
| 357 | lp->txb[lp->txbpi] = (char) chr; /* buffer char */\r |
| 358 | lp->txbpi = lp->txbpi + 1; /* adv pointer */\r |
| 359 | if (lp->txbpi >= TMXR_MAXBUF) lp->txbpi = 0; /* wrap? */\r |
| 360 | if ((char) chr == TN_IAC) { /* IAC? */\r |
| 361 | lp->txb[lp->txbpi] = (char) chr; /* IAC + IAC */\r |
| 362 | lp->txbpi = lp->txbpi + 1; /* adv pointer */ \r |
| 363 | if (lp->txbpi >= TMXR_MAXBUF) lp->txbpi = 0; /* wrap? */\r |
| 364 | }\r |
| 365 | if (tmxr_tqln (lp) > (TMXR_MAXBUF - TMXR_GUARD)) /* near full? */\r |
| 366 | lp->xmte = 0; /* disable line */\r |
| 367 | return SCPE_OK; /* char sent */\r |
| 368 | }\r |
| 369 | lp->xmte = 0; /* no room, dsbl line */\r |
| 370 | return SCPE_STALL; /* char not sent */\r |
| 371 | }\r |
| 372 | \r |
| 373 | /* Poll for output\r |
| 374 | \r |
| 375 | Inputs:\r |
| 376 | *mp = pointer to terminal multiplexor descriptor\r |
| 377 | Outputs:\r |
| 378 | none\r |
| 379 | */\r |
| 380 | \r |
| 381 | void tmxr_poll_tx (TMXR *mp)\r |
| 382 | {\r |
| 383 | int32 i, nbytes;\r |
| 384 | TMLN *lp;\r |
| 385 | \r |
| 386 | for (i = 0; i < mp->lines; i++) { /* loop thru lines */\r |
| 387 | lp = mp->ldsc + i; /* get line desc */\r |
| 388 | if (lp->conn == 0) continue; /* skip if !conn */\r |
| 389 | nbytes = tmxr_send_buffered_data (lp); /* buffered bytes */\r |
| 390 | if (nbytes == 0) lp->xmte = 1; /* buf empty? enab line */\r |
| 391 | } /* end for */\r |
| 392 | return;\r |
| 393 | }\r |
| 394 | \r |
| 395 | /* Send buffered data across network\r |
| 396 | \r |
| 397 | Inputs:\r |
| 398 | *lp = pointer to line descriptor\r |
| 399 | Outputs:\r |
| 400 | returns number of bytes still buffered\r |
| 401 | */\r |
| 402 | \r |
| 403 | int32 tmxr_send_buffered_data (TMLN *lp)\r |
| 404 | {\r |
| 405 | int32 nbytes, sbytes;\r |
| 406 | \r |
| 407 | nbytes = tmxr_tqln(lp); /* avail bytes */\r |
| 408 | if (nbytes) { /* >0? write */\r |
| 409 | if (lp->txbpr < lp->txbpi) /* no wrap? */\r |
| 410 | sbytes = sim_write_sock (lp->conn, /* write all data */\r |
| 411 | &(lp->txb[lp->txbpr]), nbytes);\r |
| 412 | else sbytes = sim_write_sock (lp->conn, /* write to end buf */\r |
| 413 | &(lp->txb[lp->txbpr]), TMXR_MAXBUF - lp->txbpr);\r |
| 414 | if (sbytes != SOCKET_ERROR) { /* ok? */\r |
| 415 | lp->txbpr = (lp->txbpr + sbytes); /* update remove ptr */\r |
| 416 | if (lp->txbpr >= TMXR_MAXBUF) lp->txbpr = 0; /* wrap? */\r |
| 417 | lp->txcnt = lp->txcnt + sbytes; /* update counts */\r |
| 418 | nbytes = nbytes - sbytes;\r |
| 419 | }\r |
| 420 | if (nbytes && (lp->txbpr == 0)) { /* more data and wrap? */\r |
| 421 | sbytes = sim_write_sock (lp->conn, lp->txb, nbytes);\r |
| 422 | if (sbytes != SOCKET_ERROR) { /* ok */\r |
| 423 | lp->txbpr = (lp->txbpr + sbytes); /* update remove ptr */\r |
| 424 | if (lp->txbpr >= TMXR_MAXBUF) lp->txbpr = 0;/* wrap? */\r |
| 425 | lp->txcnt = lp->txcnt + sbytes; /* update counts */\r |
| 426 | nbytes = nbytes - sbytes;\r |
| 427 | }\r |
| 428 | }\r |
| 429 | } /* end if nbytes */\r |
| 430 | return nbytes;\r |
| 431 | }\r |
| 432 | \r |
| 433 | /* Return count of buffered characters for line */\r |
| 434 | \r |
| 435 | int32 tmxr_tqln (TMLN *lp)\r |
| 436 | {\r |
| 437 | return (lp->txbpi - lp->txbpr + ((lp->txbpi < lp->txbpr)? TMXR_MAXBUF: 0));\r |
| 438 | }\r |
| 439 | \r |
| 440 | /* Open master socket */\r |
| 441 | \r |
| 442 | t_stat tmxr_open_master (TMXR *mp, char *cptr)\r |
| 443 | {\r |
| 444 | int32 i, port;\r |
| 445 | SOCKET sock;\r |
| 446 | TMLN *lp;\r |
| 447 | t_stat r;\r |
| 448 | \r |
| 449 | port = (int32) get_uint (cptr, 10, 65535, &r); /* get port */\r |
| 450 | if ((r != SCPE_OK) || (port == 0)) return SCPE_ARG;\r |
| 451 | sock = sim_master_sock (port); /* make master socket */\r |
| 452 | if (sock == INVALID_SOCKET) return SCPE_OPENERR; /* open error */\r |
| 453 | printf ("Listening on port %d (socket %d)\n", port, sock);\r |
| 454 | if (sim_log) fprintf (sim_log,\r |
| 455 | "Listening on port %d (socket %d)\n", port, sock);\r |
| 456 | mp->port = port; /* save port */\r |
| 457 | mp->master = sock; /* save master socket */\r |
| 458 | for (i = 0; i < mp->lines; i++) { /* initialize lines */\r |
| 459 | lp = mp->ldsc + i;\r |
| 460 | lp->conn = lp->tsta = 0;\r |
| 461 | lp->rxbpi = lp->rxbpr = 0;\r |
| 462 | lp->txbpi = lp->txbpr = 0;\r |
| 463 | lp->rxcnt = lp->txcnt = 0;\r |
| 464 | lp->xmte = 1;\r |
| 465 | lp->dstb = 0;\r |
| 466 | }\r |
| 467 | return SCPE_OK;\r |
| 468 | }\r |
| 469 | \r |
| 470 | /* Attach unit to master socket */\r |
| 471 | \r |
| 472 | t_stat tmxr_attach (TMXR *mp, UNIT *uptr, char *cptr)\r |
| 473 | {\r |
| 474 | char* tptr;\r |
| 475 | t_stat r;\r |
| 476 | \r |
| 477 | tptr = (char *) malloc (strlen (cptr) + 1); /* get string buf */\r |
| 478 | if (tptr == NULL) return SCPE_MEM; /* no more mem? */\r |
| 479 | r = tmxr_open_master (mp, cptr); /* open master socket */\r |
| 480 | if (r != SCPE_OK) { /* error? */\r |
| 481 | free (tptr); /* release buf */\r |
| 482 | return SCPE_OPENERR;\r |
| 483 | }\r |
| 484 | strcpy (tptr, cptr); /* copy port */\r |
| 485 | uptr->filename = tptr; /* save */\r |
| 486 | uptr->flags = uptr->flags | UNIT_ATT; /* no more errors */\r |
| 487 | return SCPE_OK;\r |
| 488 | }\r |
| 489 | \r |
| 490 | /* Close master socket */\r |
| 491 | \r |
| 492 | t_stat tmxr_close_master (TMXR *mp)\r |
| 493 | {\r |
| 494 | int32 i;\r |
| 495 | TMLN *lp;\r |
| 496 | \r |
| 497 | for (i = 0; i < mp->lines; i++) { /* loop thru conn */\r |
| 498 | lp = mp->ldsc + i;\r |
| 499 | if (lp->conn) {\r |
| 500 | tmxr_linemsg (lp, "\r\nDisconnected from the ");\r |
| 501 | tmxr_linemsg (lp, sim_name);\r |
| 502 | tmxr_linemsg (lp, " simulator\r\n\n");\r |
| 503 | tmxr_reset_ln (lp);\r |
| 504 | } /* end if conn */\r |
| 505 | } /* end for */\r |
| 506 | sim_close_sock (mp->master, 1); /* close master socket */\r |
| 507 | mp->master = 0;\r |
| 508 | return SCPE_OK;\r |
| 509 | }\r |
| 510 | \r |
| 511 | /* Detach unit from master socket */\r |
| 512 | \r |
| 513 | t_stat tmxr_detach (TMXR *mp, UNIT *uptr)\r |
| 514 | {\r |
| 515 | if (!(uptr->flags & UNIT_ATT)) return SCPE_OK; /* attached? */\r |
| 516 | tmxr_close_master (mp); /* close master socket */\r |
| 517 | free (uptr->filename); /* free port string */\r |
| 518 | uptr->filename = NULL;\r |
| 519 | uptr->flags = uptr->flags & ~UNIT_ATT; /* not attached */\r |
| 520 | return SCPE_OK;\r |
| 521 | }\r |
| 522 | \r |
| 523 | /* Stub examine and deposit */\r |
| 524 | \r |
| 525 | t_stat tmxr_ex (t_value *vptr, t_addr addr, UNIT *uptr, int32 sw)\r |
| 526 | {\r |
| 527 | return SCPE_NOFNC;\r |
| 528 | }\r |
| 529 | \r |
| 530 | t_stat tmxr_dep (t_value val, t_addr addr, UNIT *uptr, int32 sw)\r |
| 531 | {\r |
| 532 | return SCPE_NOFNC;\r |
| 533 | }\r |
| 534 | \r |
| 535 | /* Output message to socket or line descriptor */\r |
| 536 | \r |
| 537 | void tmxr_msg (SOCKET sock, char *msg)\r |
| 538 | {\r |
| 539 | if (sock) sim_write_sock (sock, msg, strlen (msg));\r |
| 540 | return;\r |
| 541 | }\r |
| 542 | \r |
| 543 | void tmxr_linemsg (TMLN *lp, char *msg)\r |
| 544 | {\r |
| 545 | int32 len;\r |
| 546 | \r |
| 547 | for (len = strlen (msg); len > 0; --len)\r |
| 548 | tmxr_putc_ln (lp, *msg++);\r |
| 549 | return;\r |
| 550 | }\r |
| 551 | \r |
| 552 | /* Print connections - used only in named SHOW command */\r |
| 553 | \r |
| 554 | void tmxr_fconns (FILE *st, TMLN *lp, int32 ln)\r |
| 555 | {\r |
| 556 | if (ln >= 0) fprintf (st, "line %d: ", ln);\r |
| 557 | if (lp->conn) {\r |
| 558 | int32 o1, o2, o3, o4, hr, mn, sc;\r |
| 559 | uint32 ctime;\r |
| 560 | \r |
| 561 | o1 = (lp->ipad >> 24) & 0xFF;\r |
| 562 | o2 = (lp->ipad >> 16) & 0xFF;\r |
| 563 | o3 = (lp->ipad >> 8) & 0xFF;\r |
| 564 | o4 = (lp->ipad) & 0xFF;\r |
| 565 | ctime = (sim_os_msec () - lp->cnms) / 1000;\r |
| 566 | hr = ctime / 3600;\r |
| 567 | mn = (ctime / 60) % 60;\r |
| 568 | sc = ctime % 60;\r |
| 569 | fprintf (st, "IP address %d.%d.%d.%d", o1, o2, o3, o4);\r |
| 570 | if (ctime) fprintf (st, ", connected %02d:%02d:%02d\n", hr, mn, sc);\r |
| 571 | }\r |
| 572 | else fprintf (st, "line disconnected\n");\r |
| 573 | if (lp->txlog) fprintf (st, "Logging to %s\n", lp->txlogname);\r |
| 574 | return;\r |
| 575 | }\r |
| 576 | \r |
| 577 | /* Print statistics - used only in named SHOW command */\r |
| 578 | \r |
| 579 | void tmxr_fstats (FILE *st, TMLN *lp, int32 ln)\r |
| 580 | {\r |
| 581 | static const char *enab = "on";\r |
| 582 | static const char *dsab = "off";\r |
| 583 | \r |
| 584 | if (ln >= 0) fprintf (st, "line %d: ", ln);\r |
| 585 | if (lp->conn) {\r |
| 586 | fprintf (st, "input (%s) queued/total = %d/%d, ",\r |
| 587 | (lp->rcve? enab: dsab),\r |
| 588 | lp->rxbpi - lp->rxbpr, lp->rxcnt);\r |
| 589 | fprintf (st, "output (%s) queued/total = %d/%d\n",\r |
| 590 | (lp->xmte? enab: dsab),\r |
| 591 | lp->txbpi - lp->txbpr, lp->txcnt);\r |
| 592 | }\r |
| 593 | else fprintf (st, "line disconnected\n");\r |
| 594 | return;\r |
| 595 | }\r |
| 596 | \r |
| 597 | /* Disconnect line */\r |
| 598 | \r |
| 599 | t_stat tmxr_dscln (UNIT *uptr, int32 val, char *cptr, void *desc)\r |
| 600 | {\r |
| 601 | TMXR *mp = (TMXR *) desc;\r |
| 602 | TMLN *lp;\r |
| 603 | int32 ln;\r |
| 604 | t_stat r;\r |
| 605 | \r |
| 606 | if (mp == NULL) return SCPE_IERR;\r |
| 607 | if (val) { /* = n form */\r |
| 608 | if (cptr == NULL) return SCPE_ARG;\r |
| 609 | ln = (int32) get_uint (cptr, 10, mp->lines - 1, &r);\r |
| 610 | if (r != SCPE_OK) return SCPE_ARG;\r |
| 611 | lp = mp->ldsc + ln;\r |
| 612 | }\r |
| 613 | else {\r |
| 614 | lp = tmxr_find_ldsc (uptr, 0, mp);\r |
| 615 | if (lp == NULL) return SCPE_IERR;\r |
| 616 | }\r |
| 617 | if (lp->conn) {\r |
| 618 | tmxr_linemsg (lp, "\r\nOperator disconnected line\r\n\n");\r |
| 619 | tmxr_reset_ln (lp);\r |
| 620 | }\r |
| 621 | return SCPE_OK;\r |
| 622 | }\r |
| 623 | \r |
| 624 | /* Enable logging for line */\r |
| 625 | \r |
| 626 | t_stat tmxr_set_log (UNIT *uptr, int32 val, char *cptr, void *desc)\r |
| 627 | {\r |
| 628 | TMXR *mp = (TMXR *) desc;\r |
| 629 | TMLN *lp;\r |
| 630 | \r |
| 631 | if (cptr == NULL) return SCPE_2FARG; /* no file name? */\r |
| 632 | lp = tmxr_find_ldsc (uptr, val, mp); /* find line desc */\r |
| 633 | if (lp == NULL) return SCPE_IERR;\r |
| 634 | if (lp->txlog) tmxr_set_nolog (NULL, val, NULL, desc); /* close existing log */\r |
| 635 | lp->txlogname = (char *) calloc (CBUFSIZE, sizeof (char)); /* alloc namebuf */\r |
| 636 | if (lp->txlogname == NULL) return SCPE_MEM; /* can't? */\r |
| 637 | strncpy (lp->txlogname, cptr, CBUFSIZE); /* save file name */\r |
| 638 | lp->txlog = fopen (cptr, "ab"); /* open log */\r |
| 639 | if (lp->txlog == NULL) { /* error? */\r |
| 640 | free (lp->txlogname); /* free buffer */\r |
| 641 | return SCPE_OPENERR;\r |
| 642 | }\r |
| 643 | return SCPE_OK;\r |
| 644 | }\r |
| 645 | \r |
| 646 | /* Disable logging for line */\r |
| 647 | \r |
| 648 | t_stat tmxr_set_nolog (UNIT *uptr, int32 val, char *cptr, void *desc)\r |
| 649 | {\r |
| 650 | TMXR *mp = (TMXR *) desc;\r |
| 651 | TMLN *lp;\r |
| 652 | \r |
| 653 | if (cptr) return SCPE_2MARG; /* no arguments */\r |
| 654 | lp = tmxr_find_ldsc (uptr, val, mp); /* find line desc */\r |
| 655 | if (lp == NULL) return SCPE_IERR;\r |
| 656 | if (lp->txlog) { /* logging? */\r |
| 657 | fclose (lp->txlog); /* close log */\r |
| 658 | free (lp->txlogname); /* free namebuf */\r |
| 659 | lp->txlog = NULL;\r |
| 660 | lp->txlogname = NULL;\r |
| 661 | }\r |
| 662 | return SCPE_OK;\r |
| 663 | }\r |
| 664 | \r |
| 665 | /* Show logging status for line */\r |
| 666 | \r |
| 667 | t_stat tmxr_show_log (FILE *st, UNIT *uptr, int32 val, void *desc)\r |
| 668 | {\r |
| 669 | TMXR *mp = (TMXR *) desc;\r |
| 670 | TMLN *lp;\r |
| 671 | \r |
| 672 | lp = tmxr_find_ldsc (uptr, val, mp); /* find line desc */\r |
| 673 | if (lp == NULL) return SCPE_IERR;\r |
| 674 | if (lp->txlog) fprintf (st, "logging to %s", lp->txlogname);\r |
| 675 | else fprintf (st, "no logging");\r |
| 676 | return SCPE_OK;\r |
| 677 | }\r |
| 678 | \r |
| 679 | /* Find line descriptor */\r |
| 680 | \r |
| 681 | TMLN *tmxr_find_ldsc (UNIT *uptr, int32 val, TMXR *mp)\r |
| 682 | {\r |
| 683 | if (uptr) { /* called from SET? */\r |
| 684 | DEVICE *dptr = find_dev_from_unit (uptr); /* find device */\r |
| 685 | if (dptr == NULL) return NULL; /* what?? */\r |
| 686 | val = (int32) (uptr - dptr->units); /* implicit line # */\r |
| 687 | }\r |
| 688 | if ((val < 0) || (val >= mp->lines)) return NULL; /* invalid line? */\r |
| 689 | return mp->ldsc + val; /* line descriptor */\r |
| 690 | }\r |