adamdunkels | b9614dc | 2004-08-09 20:33:51 +0000 | [diff] [blame] | 1 | #include "contiki.h" |
| 2 | #include "loader.h" |
| 3 | #include "memb.h" |
| 4 | #include "ctk-term.h" |
| 5 | #include "ctk-term-conf.h" |
| 6 | |
| 7 | /*-----------------------------------------------------------------------------------*/ |
| 8 | /* |
| 9 | * #defines and enums |
| 10 | */ |
| 11 | /*-----------------------------------------------------------------------------------*/ |
| 12 | /* Telnet special characters */ |
| 13 | #define TN_NULL 0 |
| 14 | #define TN_BL 7 |
| 15 | #define TN_BS 8 |
| 16 | #define TN_HT 9 |
| 17 | #define TN_LF 10 |
| 18 | #define TN_VT 11 |
| 19 | #define TN_FF 12 |
| 20 | #define TN_CR 13 |
| 21 | |
| 22 | /* Commands preceeded by TN_IAC */ |
| 23 | #define TN_SE 240 |
| 24 | #define TN_NOP 241 |
| 25 | #define TN_DM 242 |
| 26 | #define TN_BRK 243 |
| 27 | #define TN_IP 244 |
| 28 | #define TN_AO 245 |
| 29 | #define TN_AYT 246 |
| 30 | #define TN_EC 247 |
| 31 | #define TN_EL 248 |
| 32 | #define TN_GA 249 |
| 33 | #define TN_SB 250 |
| 34 | #define TN_WILL 251 |
| 35 | #define TN_WONT 252 |
| 36 | #define TN_DO 253 |
| 37 | #define TN_DONT 254 |
| 38 | #define TN_IAC 255 |
| 39 | |
| 40 | #define TNO_BIN 0 |
| 41 | #define TNO_ECHO 1 |
| 42 | #define TNO_SGA 3 |
| 43 | #define TNO_NAWS 31 |
| 44 | |
| 45 | /* Telnet parsing states */ |
| 46 | enum { |
| 47 | TNS_IDLE, |
| 48 | TNS_IAC, |
| 49 | TNS_OPT, |
| 50 | TNS_SB, |
| 51 | TNS_SBIAC |
| 52 | }; |
| 53 | |
| 54 | /* Telnet option negotiation states */ |
| 55 | enum { |
| 56 | TNOS_NO, |
| 57 | TNOS_WANTNO_EMPTY, |
| 58 | TNOS_WANTNO_OPPOSITE, |
| 59 | TNOS_WANTYES_EMPTY, |
| 60 | TNOS_WANTYES_OPPOSITE, |
| 61 | TNOS_YES |
| 62 | }; |
| 63 | |
| 64 | /* Telnet session states */ |
| 65 | enum { |
| 66 | TTS_FREE, /* Not allocated */ |
| 67 | TTS_IDLE, /* No data to send and nothing sent */ |
| 68 | TTS_SEND_TNDATA, /* Sending telnet data */ |
| 69 | TTS_SEND_APPDATA /* Sending data from upper layers */ |
| 70 | }; |
| 71 | |
| 72 | /* Number of options supported (we only need ECHO(1) and SGA(3) options) */ |
| 73 | #define TNSM_MAX_OPTIONS 4 |
| 74 | |
| 75 | /* Max option replies in output queue */ |
| 76 | #define TNQLEN 20 |
| 77 | |
| 78 | /* Number of option buffer */ |
| 79 | #define OPTION_POOL_SIZE 20 |
| 80 | |
| 81 | /* Maximum number of telnet sessions */ |
| 82 | #ifdef CTK_TERM_CONF_MAX_TELNET_CLIENTS |
| 83 | #define NUM_CONNS CTK_TERM_CONF_MAX_TELNET_CLIENTS |
| 84 | #else |
| 85 | #define NUM_CONNS 1 |
| 86 | #endif |
| 87 | |
| 88 | #ifdef CTK_TERM_CONF_TELNET_PORT |
| 89 | #define PORT CTK_TERM_CONF_TELNET_PORT |
| 90 | #else |
| 91 | #define PORT 23 |
| 92 | #endif |
| 93 | |
| 94 | /*-----------------------------------------------------------------------------------*/ |
| 95 | /* |
| 96 | * Structures |
| 97 | */ |
| 98 | /*-----------------------------------------------------------------------------------*/ |
| 99 | /* Telnet option state structure */ |
| 100 | struct TNOption { |
| 101 | unsigned char state; |
| 102 | unsigned char wants; |
| 103 | }; |
| 104 | |
| 105 | /* Telnet handling state structure */ |
| 106 | struct TNSMState |
| 107 | { |
| 108 | struct TNOption myOpt[TNSM_MAX_OPTIONS]; |
| 109 | struct TNOption hisOpt[TNSM_MAX_OPTIONS]; |
| 110 | unsigned char cmd; |
| 111 | unsigned char state; |
| 112 | }; |
| 113 | |
| 114 | /* Telnet session state */ |
| 115 | struct telnet_state |
| 116 | { |
| 117 | unsigned char state; |
| 118 | unsigned char* sendq[TNQLEN]; |
| 119 | struct TNSMState tnsm; |
| 120 | struct ctk_term_state* termstate; |
| 121 | }; |
| 122 | |
| 123 | /*-----------------------------------------------------------------------------------*/ |
| 124 | /* |
| 125 | * Local variables |
| 126 | */ |
| 127 | /*-----------------------------------------------------------------------------------*/ |
| 128 | /*static DISPATCHER_UIPCALL(ctk_termtelnet_appcall, state);*/ |
| 129 | static void ctk_termtelnet_appcall(void *state); |
| 130 | |
| 131 | EK_EVENTHANDLER(eventhandler, ev, data); |
| 132 | EK_PROCESS(p, "CTK telnet server", EK_PRIO_NORMAL, |
| 133 | eventhandler, NULL, NULL); |
| 134 | /*static struct dispatcher_proc p = |
| 135 | {DISPATCHER_PROC("CTK telnet server", NULL, NULL, |
| 136 | ctk_termtelnet_appcall)};*/ |
| 137 | |
| 138 | static ek_id_t id = EK_ID_NONE; |
| 139 | |
| 140 | /* Option negotiation buffer pool */ |
| 141 | MEMB(telnetbuf, 3, OPTION_POOL_SIZE); |
| 142 | |
| 143 | static int i,j; |
| 144 | static struct telnet_state states[NUM_CONNS]; |
| 145 | |
| 146 | /*-----------------------------------------------------------------------------------*/ |
| 147 | /* |
| 148 | * Send an option reply on a connection |
| 149 | */ |
| 150 | /*-----------------------------------------------------------------------------------*/ |
| 151 | static void |
| 152 | Reply(struct telnet_state* tns, unsigned char cmd, unsigned char opt) |
| 153 | { |
| 154 | unsigned char* buf = (unsigned char*)memb_alloc(&telnetbuf); |
| 155 | if (buf != 0) { |
| 156 | buf[0]=TN_IAC; |
| 157 | buf[1]=cmd; |
| 158 | buf[2]=opt; |
| 159 | for (i=0; i < TNQLEN; i++) { |
| 160 | if (tns->sendq[i] == 0) { |
| 161 | tns->sendq[i] = buf; |
| 162 | return; |
| 163 | } |
| 164 | } |
| 165 | /* Queue is full. Drop it */ |
| 166 | memb_free(&telnetbuf, (char*)buf); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /*-----------------------------------------------------------------------------------*/ |
| 171 | /* |
| 172 | * Prepare for enabling one of remote side options. |
| 173 | */ |
| 174 | /*-----------------------------------------------------------------------------------*/ |
| 175 | static void |
| 176 | EnableHisOpt(struct telnet_state* tns, unsigned char opt) |
| 177 | { |
| 178 | switch(tns->tnsm.hisOpt[opt].state) { |
| 179 | case TNOS_NO: |
| 180 | tns->tnsm.hisOpt[opt].wants = 1; |
| 181 | tns->tnsm.hisOpt[opt].state = TNOS_WANTYES_EMPTY; |
| 182 | Reply(tns, TN_DO, opt); |
| 183 | break; |
| 184 | case TNOS_WANTNO_EMPTY: |
| 185 | tns->tnsm.hisOpt[opt].state = TNOS_WANTNO_OPPOSITE; |
| 186 | break; |
| 187 | case TNOS_WANTNO_OPPOSITE: |
| 188 | break; |
| 189 | case TNOS_WANTYES_EMPTY: |
| 190 | tns->tnsm.hisOpt[opt].state = TNOS_YES; |
| 191 | break; |
| 192 | case TNOS_WANTYES_OPPOSITE: |
| 193 | tns->tnsm.hisOpt[opt].state = TNOS_WANTYES_EMPTY; |
| 194 | break; |
| 195 | case TNOS_YES: |
| 196 | break; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /*-----------------------------------------------------------------------------------*/ |
| 201 | /* |
| 202 | * Prepare for enabling one of my options |
| 203 | */ |
| 204 | /*-----------------------------------------------------------------------------------*/ |
| 205 | static void |
| 206 | EnableMyOpt(struct telnet_state* tns, unsigned char opt) |
| 207 | { |
| 208 | if (opt < TNSM_MAX_OPTIONS) { |
| 209 | switch(tns->tnsm.myOpt[opt].state) { |
| 210 | case TNOS_NO: |
| 211 | tns->tnsm.myOpt[opt].wants = 1; |
| 212 | tns->tnsm.myOpt[opt].state = TNOS_WANTYES_EMPTY; |
| 213 | Reply(tns, TN_WILL, opt); |
| 214 | break; |
| 215 | case TNOS_WANTNO_EMPTY: |
| 216 | tns->tnsm.myOpt[opt].state = TNOS_WANTNO_OPPOSITE; |
| 217 | break; |
| 218 | case TNOS_WANTNO_OPPOSITE: |
| 219 | break; |
| 220 | case TNOS_WANTYES_EMPTY: |
| 221 | tns->tnsm.myOpt[opt].state = TNOS_YES; |
| 222 | break; |
| 223 | case TNOS_WANTYES_OPPOSITE: |
| 224 | tns->tnsm.myOpt[opt].state = TNOS_WANTYES_EMPTY; |
| 225 | break; |
| 226 | case TNOS_YES: |
| 227 | break; |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | /*-----------------------------------------------------------------------------------*/ |
| 233 | /* |
| 234 | * Implementation of option negotiation using the Q-method |
| 235 | */ |
| 236 | /*-----------------------------------------------------------------------------------*/ |
| 237 | static void |
| 238 | HandleCommand(struct telnet_state* tns, unsigned char cmd, unsigned char opt) |
| 239 | { |
| 240 | if (opt < TNSM_MAX_OPTIONS) { |
| 241 | /* Handling according to RFC 1143 "Q Method" */ |
| 242 | switch(cmd) { |
| 243 | case TN_WILL: |
| 244 | switch(tns->tnsm.hisOpt[opt].state) { |
| 245 | case TNOS_NO: |
| 246 | if (tns->tnsm.hisOpt[opt].wants) { |
| 247 | tns->tnsm.hisOpt[opt].state = TNOS_YES; |
| 248 | Reply(tns, TN_DO, opt); |
| 249 | } |
| 250 | else { |
| 251 | Reply(tns, TN_DONT, opt); |
| 252 | } |
| 253 | break; |
| 254 | case TNOS_WANTNO_EMPTY: |
| 255 | tns->tnsm.hisOpt[opt].state = TNOS_NO; |
| 256 | break; |
| 257 | case TNOS_WANTNO_OPPOSITE: |
| 258 | tns->tnsm.hisOpt[opt].state = TNOS_YES; |
| 259 | break; |
| 260 | case TNOS_WANTYES_EMPTY: |
| 261 | tns->tnsm.hisOpt[opt].state = TNOS_YES; |
| 262 | break; |
| 263 | case TNOS_WANTYES_OPPOSITE: |
| 264 | tns->tnsm.hisOpt[opt].state = TNOS_WANTNO_EMPTY; |
| 265 | Reply(tns, TN_DONT, opt); |
| 266 | break; |
| 267 | case TNOS_YES: |
| 268 | break; |
| 269 | } |
| 270 | break; |
| 271 | case TN_WONT: |
| 272 | switch(tns->tnsm.hisOpt[opt].state) { |
| 273 | case TNOS_NO: |
| 274 | break; |
| 275 | case TNOS_WANTNO_EMPTY: |
| 276 | case TNOS_WANTYES_EMPTY: |
| 277 | case TNOS_WANTYES_OPPOSITE: |
| 278 | tns->tnsm.hisOpt[opt].state = TNOS_NO; |
| 279 | break; |
| 280 | case TNOS_WANTNO_OPPOSITE: |
| 281 | tns->tnsm.hisOpt[opt].state = TNOS_WANTYES_EMPTY; |
| 282 | Reply(tns, TN_DO, opt); |
| 283 | break; |
| 284 | case TNOS_YES: |
| 285 | tns->tnsm.hisOpt[opt].state = TNOS_NO; |
| 286 | Reply(tns, TN_DONT, opt); |
| 287 | break; |
| 288 | } |
| 289 | break; |
| 290 | case TN_DO: |
| 291 | switch(tns->tnsm.myOpt[opt].state) { |
| 292 | case TNOS_NO: |
| 293 | if (tns->tnsm.myOpt[opt].wants) { |
| 294 | tns->tnsm.myOpt[opt].state = TNOS_YES; |
| 295 | Reply(tns, TN_WILL, opt); |
| 296 | } |
| 297 | else { |
| 298 | Reply(tns, TN_WONT, opt); |
| 299 | } |
| 300 | break; |
| 301 | case TNOS_WANTNO_EMPTY: |
| 302 | tns->tnsm.myOpt[opt].state = TNOS_NO; |
| 303 | break; |
| 304 | case TNOS_WANTNO_OPPOSITE: |
| 305 | tns->tnsm.myOpt[opt].state = TNOS_YES; |
| 306 | break; |
| 307 | case TNOS_WANTYES_EMPTY: |
| 308 | tns->tnsm.myOpt[opt].state = TNOS_YES; |
| 309 | break; |
| 310 | case TNOS_WANTYES_OPPOSITE: |
| 311 | tns->tnsm.myOpt[opt].state = TNOS_WANTNO_EMPTY; |
| 312 | Reply(tns, TN_WONT, opt); |
| 313 | break; |
| 314 | case TNOS_YES: |
| 315 | break; |
| 316 | } |
| 317 | break; |
| 318 | case TN_DONT: |
| 319 | switch(tns->tnsm.myOpt[opt].state) { |
| 320 | case TNOS_NO: |
| 321 | break; |
| 322 | case TNOS_WANTNO_EMPTY: |
| 323 | case TNOS_WANTYES_EMPTY: |
| 324 | case TNOS_WANTYES_OPPOSITE: |
| 325 | tns->tnsm.myOpt[opt].state = TNOS_NO; |
| 326 | break; |
| 327 | case TNOS_WANTNO_OPPOSITE: |
| 328 | tns->tnsm.myOpt[opt].state = TNOS_WANTYES_EMPTY; |
| 329 | Reply(tns, TN_WILL, opt); |
| 330 | break; |
| 331 | case TNOS_YES: |
| 332 | tns->tnsm.myOpt[opt].state = TNOS_NO; |
| 333 | Reply(tns, TN_WONT, opt); |
| 334 | break; |
| 335 | } |
| 336 | break; |
| 337 | } |
| 338 | } |
| 339 | else { |
| 340 | switch(cmd) { |
| 341 | case TN_WILL: |
| 342 | Reply(tns, TN_DONT, opt); |
| 343 | break; |
| 344 | case TN_WONT: |
| 345 | break; |
| 346 | case TN_DO: |
| 347 | Reply(tns, TN_WONT, opt); |
| 348 | break; |
| 349 | case TN_DONT: |
| 350 | break; |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | /*-----------------------------------------------------------------------------------*/ |
| 356 | /* |
| 357 | * Telnet data parsing |
| 358 | */ |
| 359 | /*-----------------------------------------------------------------------------------*/ |
| 360 | static unsigned char |
| 361 | parse_input(struct telnet_state* tns, unsigned char b) |
| 362 | { |
| 363 | unsigned char ret = 0; |
| 364 | switch(tns->tnsm.state) { |
| 365 | case TNS_IDLE: |
| 366 | if (b == TN_IAC) tns->tnsm.state = TNS_IAC; |
| 367 | else ret = 1; |
| 368 | break; |
| 369 | case TNS_IAC: |
| 370 | switch(b) { |
| 371 | case TN_SE: |
| 372 | case TN_NOP: |
| 373 | case TN_DM: |
| 374 | case TN_BRK: |
| 375 | case TN_IP: |
| 376 | case TN_AO: |
| 377 | case TN_AYT: |
| 378 | case TN_EC: |
| 379 | case TN_EL: |
| 380 | case TN_GA: |
| 381 | tns->tnsm.state = TNS_IDLE; |
| 382 | break; |
| 383 | case TN_SB: |
| 384 | tns->tnsm.state = TNS_SB; |
| 385 | break; |
| 386 | case TN_WILL: |
| 387 | case TN_WONT: |
| 388 | case TN_DO: |
| 389 | case TN_DONT: |
| 390 | tns->tnsm.cmd = b; |
| 391 | tns->tnsm.state = TNS_OPT; |
| 392 | break; |
| 393 | case TN_IAC: |
| 394 | tns->tnsm.state = TNS_IDLE; |
| 395 | ret = 1; |
| 396 | break; |
| 397 | default: |
| 398 | /* Drop unknown IACs */ |
| 399 | tns->tnsm.state = TNS_IDLE; |
| 400 | break; |
| 401 | } |
| 402 | break; |
| 403 | case TNS_OPT: |
| 404 | HandleCommand(tns, tns->tnsm.cmd, b); |
| 405 | tns->tnsm.state = TNS_IDLE; |
| 406 | break; |
| 407 | case TNS_SB: |
| 408 | if (b == TN_IAC) { |
| 409 | tns->tnsm.state = TNS_SBIAC; |
| 410 | } |
| 411 | break; |
| 412 | case TNS_SBIAC: |
| 413 | if (b == TN_IAC) { |
| 414 | tns->tnsm.state = TNS_SB; |
| 415 | } |
| 416 | else if (b == TN_SE) { |
| 417 | tns->tnsm.state = TNS_IDLE; |
| 418 | } |
| 419 | else { |
| 420 | tns->tnsm.state = TNS_IDLE; |
| 421 | } |
| 422 | break; |
| 423 | } |
| 424 | return ret; |
| 425 | } |
| 426 | |
| 427 | /*-----------------------------------------------------------------------------------*/ |
| 428 | /* |
| 429 | * Initialize telnet machine |
| 430 | */ |
| 431 | /*-----------------------------------------------------------------------------------*/ |
| 432 | static void |
| 433 | telnet_init(struct telnet_state* tns) |
| 434 | { |
| 435 | int i; |
| 436 | for (i = 0; i < TNSM_MAX_OPTIONS; i++) { |
| 437 | tns->tnsm.myOpt[i].state = TNOS_NO; |
| 438 | tns->tnsm.myOpt[i].wants = 0; |
| 439 | tns->tnsm.hisOpt[i].state = TNOS_NO; |
| 440 | tns->tnsm.hisOpt[i].wants = 0; |
| 441 | } |
| 442 | tns->tnsm.state = TNS_IDLE; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | /*-----------------------------------------------------------------------------------*/ |
| 447 | /* |
| 448 | * Allocate a telnet session structure (including terminal state) |
| 449 | */ |
| 450 | /*-----------------------------------------------------------------------------------*/ |
| 451 | static struct telnet_state* |
| 452 | alloc_state() |
| 453 | { |
| 454 | for (i=0; i < NUM_CONNS; i++) { |
| 455 | if (states[i].state == TTS_FREE) { |
| 456 | states[i].termstate = ctk_term_alloc_state(); |
| 457 | if (states[i].termstate != NULL) { |
| 458 | for (j = 0; j < TNQLEN; j++) { |
| 459 | states[i].sendq[j] = 0; |
| 460 | } |
| 461 | telnet_init(&states[i]); |
| 462 | states[i].state = TTS_IDLE; |
| 463 | return &(states[i]); |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | return NULL; |
| 468 | } |
| 469 | |
| 470 | /*-----------------------------------------------------------------------------------*/ |
| 471 | /* |
| 472 | * Free a telnet session structure (including terminal state) |
| 473 | */ |
| 474 | /*-----------------------------------------------------------------------------------*/ |
| 475 | static void |
| 476 | free_state(struct telnet_state* tns) |
| 477 | { |
| 478 | if (tns != NULL) { |
| 479 | ctk_term_dealloc_state(tns->termstate); |
| 480 | tns->state = TTS_FREE; |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | /*-----------------------------------------------------------------------------------*/ |
| 485 | /* |
| 486 | * A packet is successfully sent |
| 487 | */ |
| 488 | /*-----------------------------------------------------------------------------------*/ |
| 489 | static void |
| 490 | acked(struct telnet_state* tns) |
| 491 | { |
| 492 | /* Were we sending a telnet option packet? */ |
| 493 | if (tns->state == TTS_SEND_TNDATA) { |
| 494 | /* Yes, free it and update queue */ |
| 495 | if (tns->sendq[0] != 0) { |
| 496 | memb_free(&telnetbuf, (char*)(tns->sendq[0])); |
| 497 | for (i=1; i < TNQLEN; i++) { |
| 498 | tns->sendq[i-1] = tns->sendq[i]; |
| 499 | } |
| 500 | tns->sendq[TNQLEN-1] = 0; |
| 501 | /* No options left. Go idle */ |
| 502 | if (tns->sendq[0] == 0) { |
| 503 | tns->state = TTS_IDLE; |
| 504 | } |
| 505 | } |
| 506 | } |
| 507 | /* Or were we sending application date ? */ |
| 508 | else if (tns->state == TTS_SEND_APPDATA) { |
| 509 | /* Inform application that data is sent successfully */ |
| 510 | ctk_term_sent(tns->termstate); |
| 511 | tns->state = TTS_IDLE; |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | /*-----------------------------------------------------------------------------------*/ |
| 516 | /* |
| 517 | * Send data on a connections |
| 518 | */ |
| 519 | /*-----------------------------------------------------------------------------------*/ |
| 520 | static void |
| 521 | senddata(struct telnet_state* tns) |
| 522 | { |
| 523 | /* Check if there are any option packets to send */ |
| 524 | if (tns->state == TTS_IDLE || tns->state == TTS_SEND_TNDATA) { |
| 525 | if (tns->sendq[0] != 0) { |
| 526 | tns->state = TTS_SEND_TNDATA; |
| 527 | uip_send(tns->sendq[0],3); |
| 528 | } |
| 529 | } |
| 530 | /* Check if terminal wants to send any data */ |
| 531 | if (tns->state == TTS_IDLE || tns->state == TTS_SEND_APPDATA) { |
| 532 | u16_t len = ctk_term_send(tns->termstate, (unsigned char*)uip_appdata, (unsigned short)uip_mss()); |
| 533 | if (len > 0) { |
| 534 | tns->state = TTS_SEND_APPDATA; |
| 535 | uip_send(uip_appdata, len); |
| 536 | } |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | /*-----------------------------------------------------------------------------------*/ |
| 541 | /* |
| 542 | * uIP callback |
| 543 | */ |
| 544 | /*-----------------------------------------------------------------------------------*/ |
| 545 | static void |
| 546 | ctk_termtelnet_appcall(void *state) |
| 547 | { |
| 548 | struct telnet_state *tns; |
| 549 | |
| 550 | tns = (struct telnet_state*)(state); |
| 551 | |
| 552 | if(uip_connected()) { |
| 553 | if(tns == NULL) { |
| 554 | tns = alloc_state(); |
| 555 | if(tns == NULL) { |
| 556 | uip_close(); |
| 557 | return; |
| 558 | } |
| 559 | tcp_markconn(uip_conn, (void *)tns); |
| 560 | } |
| 561 | /* Try to negotiate some options */ |
| 562 | EnableHisOpt(tns, TNO_SGA); |
| 563 | EnableMyOpt(tns,TNO_SGA); |
| 564 | EnableMyOpt(tns,TNO_ECHO); |
| 565 | /* Request update of screen */ |
| 566 | ctk_term_redraw(tns->termstate); |
| 567 | senddata(tns); |
| 568 | } else if(uip_closed() || uip_aborted()) { |
| 569 | free_state(tns); |
| 570 | return; |
| 571 | } |
| 572 | |
| 573 | if (uip_acked()) { |
| 574 | acked(tns); |
| 575 | } |
| 576 | |
| 577 | if (uip_newdata()) { |
| 578 | for(j = 0; j < uip_datalen(); j++) { |
| 579 | if (parse_input(tns, uip_appdata[j])) { |
| 580 | /* Pass it uppwards */ |
| 581 | ctk_term_input(tns->termstate, uip_appdata[j]); |
| 582 | } |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | if(uip_rexmit() || |
| 587 | uip_newdata() || |
| 588 | uip_acked()) { |
| 589 | senddata(tns); |
| 590 | } else if(uip_poll()) { |
| 591 | if (tns->state == TTS_IDLE) { |
| 592 | senddata(tns); |
| 593 | } |
| 594 | } |
| 595 | } |
| 596 | /*-----------------------------------------------------------------------------------*/ |
| 597 | /* |
| 598 | * Init function |
| 599 | */ |
| 600 | /*-----------------------------------------------------------------------------------*/ |
| 601 | LOADER_INIT_FUNC(ctk_termtelnet_init, arg) |
| 602 | { |
| 603 | arg_free(arg); |
| 604 | if(id == EK_ID_NONE) { |
| 605 | memb_init(&telnetbuf); |
| 606 | for (i=0; i < NUM_CONNS; i++) { |
| 607 | states[i].state = TTS_FREE; |
| 608 | } |
| 609 | id = ek_start(&p); |
| 610 | } |
| 611 | } |
| 612 | /*-----------------------------------------------------------------------------------*/ |
| 613 | EK_EVENTHANDLER(eventhandler, ev, data) |
| 614 | { |
| 615 | if(ev == EK_EVENT_INIT) { |
| 616 | tcp_listen(HTONS(PORT)); |
| 617 | } else if(ev == tcpip_event) { |
| 618 | ctk_termtelnet_appcall(data); |
| 619 | } |
| 620 | } |