src/client.c

   1 /*
   2  * C Client for the DX Spider cluster program
   3  *
   4  * Eventually this program will be a complete replacement
   5  * for the perl version.
   6  *
   7  * This program provides the glue necessary to talk between
   8  * an input (eg from telnet or ax25) and the perl DXSpider
   9  * node.
  10  *
  11  * Currently, this program connects STDIN/STDOUT to the
  12  * message system used by cluster.pl
  13  *
  14  * Copyright (c) 2000 Dirk Koopman G1TLH
  15  *
  16  * $Id$
  17  */
  18
  19 #include <stdio.h>
  20 #include <sys/time.h>
  21 #include <sys/types.h>
  22 #include <unistd.h>
  23 #include <ctype.h>
  24 #include <stdlib.h>
  25 #include <stdarg.h>
  26 #include <netdb.h>
  27 #include <sys/socket.h>
  28 #include <netinet/in.h>
  29 #include <errno.h>
  30 #include <signal.h>
  31 #include <string.h>
  32 #include <termios.h>
  33 #include <regex.h>
  34
  35 #include "sel.h"
  36 #include "cmsg.h"
  37 #include "debug.h"
  38
  39 #define TEXT 1
  40 #define MSG 2
  41 #define MAXBUFL 1024
  42
  43 #ifndef MAXPATHLEN
  44 #define MAXPATHLEN 256
  45 #endif
  46
  47 #define DEFPACLEN 128
  48 #define MAXPACLEN 236
  49
  50 #define DBUF 1
  51 #define DMSG 2
  52
  53 typedef struct
  54 {
  55         int cnum;                                       /* the connection number */
  56         int sort;                                       /* the type of connection either text or msg */
  57         cmsg_t *in;                                     /* current input message being built up */
  58         cmsg_t *out;                            /* current output message being sent */
  59         cmsg_t *obuf;                           /* current output being buffered */
  60         reft *inq;                                      /* input queue */
  61         reft *outq;                                     /* output queue */
  62         sel_t *sp;                                      /* my select fcb address */
  63         struct termios t;                       /* any termios associated with this cnum */
  64         char echo;                                      /* echo characters back to this cnum */
  65         char t_set;                                     /* the termios structure is valid */
  66         char buffer_it;                         /* buffer outgoing packets for paclen */
  67 } fcb_t;
  68
  69 typedef struct
  70 {
  71         char *in;
  72         regex_t *regex;
  73 } myregex_t;
  74
  75
  76 char *node_addr = "localhost";  /* the node tcp address, can be overridden by DXSPIDER_HOST */
  77 int node_port = 27754;                  /* the tcp port of the node at the above address can be overidden by DXSPIDER_PORT*/
  78 char *call;                                             /* the caller's callsign */
  79 char *connsort;                                 /* the type of connection */
  80 fcb_t *in;                                              /* the fcb of 'stdin' that I shall use */
  81 fcb_t *node;                                    /* the fcb of the msg system */
  82 char nl = '\n';                                 /* line end character */
  83 char ending = 0;                                /* set this to end the program */
  84 char send_Z = 1;                                /* set a Z record to the node on termination */
  85 char echo = 1;                                  /* echo characters on stdout from stdin */
  86 char int_tabs = 0;                              /* interpret tabs -> spaces */
  87 char *root = "/spider";         /* root of data tree, can be overridden by DXSPIDER_ROOT  */
  88 int timeout = 60;                               /* default timeout for logins and things */
  89 int paclen = DEFPACLEN;                 /* default buffer size for outgoing packets */
  90 int tabsize = 8;                                /* default tabsize for text messages */
  91
  92 myregex_t iscallreg[] = {               /* regexes to determine whether this is a reasonable callsign */
  93         {
  94                 "^[A-Z]+[0-9]+[A-Z]+[1-9]?$", 0
  95         },
  96         {
  97                 "^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?$", 0
  98         },
  99         {
 100                 "^[A-Z]+[0-9]+[A-Z]+[1-9]?-[1-9]$", 0
 101         },
 102         {
 103                 "^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?-[1-9]$", 0
 104         },
 105         {
 106                 "^[A-Z]+[0-9]+[A-Z]+[1-9]?-1[0-5]$", 0
 107         },
 108         {
 109                 "^[0-9]+[A-Z]+[0-9]+[A-Z]+[1-9]?-1[0-5]$", 0
 110         },
 111         {
 112                 0, 0
 113         }
 114 };
 115
 116 void terminate(int);
 117
 118 /*
 119  * utility routines - various
 120  */
 121
 122 void die(char *s, ...)
 123 {
 124         char buf[2000];
 125
 126         va_list ap;
 127         va_start(ap, s);
 128         vsnprintf(buf, sizeof(buf)-1, s, ap);
 129         va_end(ap);
 130         fprintf(stderr,"%s\n", buf);
 131         terminate(-1);
 132 }
 133
 134 char *strupper(char *s)
 135 {
 136         char *d = malloc(strlen(s)+1);
 137         char *p = d;
 138
 139         if (!d)
 140                 die("out of room in strupper");
 141         while (*p++ = toupper(*s++)) ;
 142         return d;
 143 }
 144
 145 char *strlower(char *s)
 146 {
 147         char *d = malloc(strlen(s)+1);
 148         char *p = d;
 149
 150         if (!d)
 151                 die("out of room in strlower");
 152         while (*p++ = tolower(*s++)) ;
 153         return d;
 154 }
 155
 156 int eq(char *a, char *b)
 157 {
 158         return (strcmp(a, b) == 0);
 159 }
 160
 161 int xopen(char *dir, char *name, int mode)
 162 {
 163         char fn[MAXPATHLEN+1];
 164         snprintf(fn, MAXPATHLEN, "%s/%s/%s", root, dir, name);
 165         return open(fn, mode);
 166 }
 167
 168 int iscallsign(char *s)
 169 {
 170         myregex_t *rp;
 171         for (rp = iscallreg; rp->in; ++rp) {
 172                 if (regexec(rp->regex, s, 0, 0, 0) == 0)
 173                         return 1;
 174         }
 175         return 0;
 176 }
 177
 178 /*
 179  * higher level send and receive routines
 180  */
 181
 182 fcb_t *fcb_new(int cnum, int sort)
 183 {
 184         fcb_t *f = malloc(sizeof(fcb_t));
 185         if (!f)
 186                 die("no room in fcb_new");
 187         memset (f, 0, sizeof(fcb_t));
 188         f->cnum = cnum;
 189         f->sort = sort;
 190         f->inq = chain_new();
 191         f->outq = chain_new();
 192         return f;
 193 }
 194
 195 void flush_text(fcb_t *f)
 196 {
 197         if (f->obuf) {
 198                 cmsg_send(f->outq, f->obuf, 0);
 199                 f->sp->flags |= SEL_OUTPUT;
 200                 f->obuf = 0;
 201         }
 202 }
 203
 204 void send_text(fcb_t *f, char *s, int l)
 205 {
 206         cmsg_t *mp;
 207         char *p;
 208
 209         if (f->buffer_it && f->obuf) {
 210                 mp = f->obuf;
 211         } else {
 212                 f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
 213         }
 214
 215         for (p = s; p < s+l; ) {
 216                 if (mp->inp >= mp->data + paclen) {
 217                         flush_text(f);
 218                         f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
 219                 }
 220                 *mp->inp++ = *p++;
 221         }
 222         if (mp->inp >= mp->data + paclen) {
 223                 flush_text(f);
 224                 f->obuf = mp = cmsg_new(paclen+1, f->sort, f);
 225         }
 226         *mp->inp++ = nl;
 227         if (!f->buffer_it)
 228                 flush_text(f);
 229 }
 230
 231 void send_msg(fcb_t *f, char let, char *s, int l)
 232 {
 233         cmsg_t *mp;
 234         int ln;
 235         int myl = strlen(call)+2+l;
 236
 237         mp = cmsg_new(myl+4+1, f->sort, f);
 238         ln = htonl(myl);
 239         memcpy(mp->inp, &ln, 4);
 240         mp->inp += 4;
 241         *mp->inp++ = let;
 242         strcpy(mp->inp, call);
 243         mp->inp += strlen(call);
 244         *mp->inp++ = '|';
 245         if (l > 0) {
 246                 memcpy(mp->inp, s, l);
 247                 mp->inp += l;
 248         }
 249         *mp->inp = 0;
 250         cmsg_send(f->outq, mp, 0);
 251         f->sp->flags |= SEL_OUTPUT;
 252 }
 253
 254 /*
 255  * the callback (called by sel_run) that handles all the inputs and outputs
 256  */
 257
 258 int fcb_handler(sel_t *sp, int in, int out, int err)
 259 {
 260         fcb_t *f = sp->fcb;
 261         cmsg_t *mp, *omp;
 262
 263         /* input modes */
 264         if (in) {
 265                 char *p, buf[MAXBUFL];
 266                 int r;
 267
 268                 /* read what we have into a buffer */
 269                 r = read(f->cnum, buf, MAXBUFL);
 270                 if (r < 0) {
 271                         switch (errno) {
 272                         case EINTR:
 273                         case EINPROGRESS:
 274                         case EAGAIN:
 275                                 goto lout;
 276                         default:
 277                                 if (f->sort == MSG)
 278                                         send_Z = 0;
 279                                 ending++;
 280                                 return 0;
 281                         }
 282                 } else if (r == 0) {
 283                         if (f->sort == MSG)
 284                                 send_Z = 0;
 285                         ending++;
 286                         return 0;
 287                 }
 288
 289                 dbgdump(DBUF, "in ->", buf, r);
 290
 291                 /* create a new message buffer if required */
 292                 if (!f->in)
 293                         f->in = cmsg_new(MAXBUFL+1, f->sort, f);
 294                 mp = f->in;
 295
 296                 switch (f->sort) {
 297                 case TEXT:
 298                         p = buf;
 299                         if (f->echo)
 300                                 omp = cmsg_new(3*r+1, f->sort, f);
 301                         while (r > 0 && p < &buf[r]) {
 302
 303                                 /* echo processing */
 304                                 if (f->echo) {
 305                                         switch (*p) {
 306                                         case '\b':
 307                                         case 0x7f:
 308                                                 strcpy(omp->inp, "\b \b");
 309                                                 omp->inp += strlen(omp->inp);
 310                                                 break;
 311                                         default:
 312                                                 *omp->inp++ = *p;
 313                                         }
 314                                 }
 315
 316                                 /* character processing */
 317                                 switch (*p) {
 318                                 case '\t':
 319                                         if (int_tabs) {
 320                                                 memset(mp->inp, ' ', tabsize);
 321                                                 mp->inp += tabsize;
 322                                                 ++p;
 323                                         } else {
 324                                                 *mp->inp++ = *p++;
 325                                         }
 326                                         break;
 327                                 case '\b':
 328                                 case 0x7f:
 329                                         if (mp->inp > mp->data)
 330                                                 mp->inp--;
 331                                         ++p;
 332                                         break;
 333                                 default:
 334                                         if (nl == '\n' && *p == '\r') {   /* ignore \r in telnet mode (ugh) */
 335                                                 p++;
 336                                         } else if (*p == nl) {
 337                                                 if (mp->inp == mp->data)
 338                                                         *mp->inp++ = ' ';
 339                                                 *mp->inp = 0;              /* zero terminate it, but don't include it in the length */
 340                                                 dbgdump(DMSG, "QUEUE TEXT", mp->data, mp->inp-mp->data);
 341                                                 cmsg_send(f->inq, mp, 0);
 342                                                 f->in = mp = cmsg_new(MAXBUFL+1, f->sort, f);
 343                                                 ++p;
 344                                         } else {
 345                                                 if (mp->inp < &mp->data[MAXBUFL-8])
 346                                                         *mp->inp++ = *p++;
 347                                                 else {
 348                                                         mp->inp = mp->data;
 349                                                 }
 350                                         }
 351                                 }
 352                         }
 353
 354                         /* queue any echo text */
 355                         if (f->echo) {
 356                                 dbgdump(DMSG, "QUEUE ECHO TEXT", omp->data, omp->inp - omp->data);
 357                                 cmsg_send(f->outq, omp, 0);
 358                                 f->sp->flags |= SEL_OUTPUT;
 359                         }
 360
 361                         break;
 362
 363                 case MSG:
 364                         p = buf;
 365                         while (r > 0 && p < &buf[r]) {
 366
 367                                 /* build up the size into the likely message length (yes I know it's a short) */
 368                                 switch (mp->state) {
 369                                 case 0:
 370                                 case 1:
 371                                         mp->state++;
 372                                         break;
 373                                 case 2:
 374                                 case 3:
 375                                         mp->size = (mp->size << 8) | (*p++ & 0xff);
 376                                         if (mp->size > MAXBUFL)
 377                                                 die("Message size too big from node (%d > %d)", mp->size, MAXBUFL);
 378                                         mp->state++;
 379                                         break;
 380                                 default:
 381                                         if (mp->inp - mp->data < mp->size) {
 382                                                 *mp->inp++ = *p++;
 383                                         }
 384                                         if (mp->inp - mp->data >= mp->size) {
 385                                                 /* kick it upstairs */
 386                                                 dbgdump(DMSG, "QUEUE MSG", mp->data, mp->inp - mp->data);
 387                                                 cmsg_send(f->inq, mp, 0);
 388                                                 mp = f->in = cmsg_new(MAXBUFL+1, f->sort, f);
 389                                         }
 390                                 }
 391                         }
 392                         break;
 393
 394                 default:
 395                         die("invalid sort (%d) in input handler", f->sort);
 396                 }
 397         }
 398
 399         /* output modes */
 400 lout:;
 401         if (out) {
 402                 int l, r;
 403
 404                 if (!f->out) {
 405                         mp = f->out = cmsg_next(f->outq);
 406                         if (!mp) {
 407                                 sp->flags &= ~SEL_OUTPUT;
 408                                 return 0;
 409                         }
 410                         mp->inp = mp->data;
 411                 }
 412                 l = mp->size - (mp->inp - mp->data);
 413                 if (l > 0) {
 414
 415                         dbgdump(DBUF, "<-out", mp->inp, l);
 416
 417                         r = write(f->cnum, mp->inp, l);
 418                         if (r < 0) {
 419                                 switch (errno) {
 420                                 case EINTR:
 421                                 case EINPROGRESS:
 422                                 case EAGAIN:
 423                                         goto lend;
 424                                 default:
 425                                         if (f->sort == MSG)
 426                                                 send_Z = 0;
 427                                         ending++;
 428                                         return;
 429                                 }
 430                         } else if (r > 0) {
 431                                 mp->inp += r;
 432                         }
 433                 } else if (l < 0)
 434                         die("got negative length in handler on node");
 435                 if (mp->inp - mp->data >= mp->size) {
 436                         cmsg_callback(mp, 0);
 437                         f->out = 0;
 438                 }
 439         }
 440 lend:;
 441         return 0;
 442 }
 443
 444 /*
 445  * things to do with initialisation
 446  */
 447
 448 void initargs(int argc, char *argv[])
 449 {
 450         int i, c, err = 0;
 451
 452         while ((c = getopt(argc, argv, "h:p:x:")) > 0) {
 453                 switch (c) {
 454                 case 'h':
 455                         node_addr = optarg;
 456                         break;
 457                 case 'l':
 458                         paclen = atoi(optarg);
 459                         if (paclen < 80)
 460                                 paclen = 80;
 461                         if (paclen > MAXPACLEN)
 462                                 paclen = MAXPACLEN;
 463                         break;
 464                 case 'p':
 465                         node_port = atoi(optarg);
 466                         break;
 467                 case 'x':
 468                         dbginit("client");
 469                         dbgset(atoi(optarg));
 470                         break;
 471                 default:
 472                         ++err;
 473                         goto lerr;
 474                 }
 475         }
 476
 477 lerr:
 478         if (err) {
 479                 die("usage: client [-x n|-h<host>|-p<port>|-l<paclen>] <call>|login [local|telnet|ax25]");
 480         }
 481
 482         if (optind < argc) {
 483                 call = strupper(argv[optind]);
 484                 ++optind;
 485         }
 486         if (!call)
 487                 die("Must have at least a callsign (for now)");
 488
 489         if (optind < argc) {
 490                 connsort = strlower(argv[optind]);
 491                 if (eq(connsort, "telnet") || eq(connsort, "local")) {
 492                         nl = '\n';
 493                         echo = 1;
 494                 } else if (eq(connsort, "ax25")) {
 495                         nl = '\r';
 496                         echo = 0;
 497                 } else {
 498                         die("2nd argument must be \"telnet\" or \"ax25\" or \"local\"");
 499                 }
 500         } else {
 501                 connsort = "local";
 502                 nl = '\n';
 503                 echo = 1;
 504         }
 505
 506         /* this is kludgy, but hey so is the rest of this! */
 507         if (!eq(connsort, "ax25") && paclen == DEFPACLEN) {
 508                 paclen = MAXPACLEN;
 509         }
 510 }
 511
 512 void connect_to_node()
 513 {
 514         struct hostent *hp, *gethostbyname();
 515         struct sockaddr_in server;
 516         int nodef;
 517         sel_t *sp;
 518
 519         if ((hp = gethostbyname(node_addr)) == 0)
 520                 die("Unknown host tcp host %s for printer", node_addr);
 521
 522         memset(&server, 0, sizeof server);
 523         server.sin_family = AF_INET;
 524         memcpy(&server.sin_addr, hp->h_addr, hp->h_length);
 525         server.sin_port = htons(node_port);
 526
 527         nodef = socket(AF_INET, SOCK_STREAM, 0);
 528         if (nodef < 0)
 529                 die("Can't open socket to %s port %d (%d)", node_addr, node_port, errno);
 530
 531         if (connect(nodef, (struct sockaddr *) &server, sizeof server) < 0) {
 532                 die("Error on connect to %s port %d (%d)", node_addr, node_port, errno);
 533         }
 534         node = fcb_new(nodef, MSG);
 535         node->sp = sel_open(nodef, node, "Msg System", fcb_handler, MSG, SEL_INPUT);
 536
 537 }
 538
 539 /*
 540  * things to do with going away
 541  */
 542
 543 void term_timeout(int i)
 544 {
 545         /* none of this is going to be reused so don't bother cleaning up properly */
 546         if (in && in->t_set)
 547                 tcsetattr(0, TCSANOW, &in->t);
 548         if (node) {
 549                 close(node->cnum);
 550         }
 551         exit(i);
 552 }
 553
 554 void terminate(int i)
 555 {
 556         if (node && send_Z && call) {
 557                 send_msg(node, 'Z', "", 0);
 558         }
 559
 560         signal(SIGALRM, term_timeout);
 561         alarm(10);
 562
 563         while ((in && !is_chain_empty(in->outq)) ||
 564                    (node && !is_chain_empty(node->outq))) {
 565                 sel_run();
 566         }
 567         if (in && in->t_set)
 568                 tcsetattr(0, TCSADRAIN, &in->t);
 569         if (node)
 570                 close(node->cnum);
 571         exit(i);
 572 }
 573
 574 void login_timeout(int i)
 575 {
 576         write(0, "Timed Out", 10);
 577         write(0, &nl, 1);
 578         sel_run();                                      /* force a coordination */
 579         if (in && in->t_set)
 580                 tcsetattr(0, TCSANOW, &in->t);
 581         exit(i);
 582 }
 583
 584 /*
 585  * things to do with ongoing processing of inputs
 586  */
 587
 588 void process_stdin()
 589 {
 590         cmsg_t *mp = cmsg_next(in->inq);
 591         if (mp) {
 592                 dbg(DMSG, "MSG size: %d", mp->size);
 593
 594                 if (mp->size > 0 && mp->inp > mp->data) {
 595                         send_msg(node, 'I', mp->data, mp->size);
 596                 }
 597                 cmsg_callback(mp, 0);
 598         }
 599 }
 600
 601 void process_node()
 602 {
 603         cmsg_t *mp = cmsg_next(node->inq);
 604         if (mp) {
 605                 dbg(DMSG, "MSG size: %d", mp->size);
 606
 607                 if (mp->size > 0 && mp->inp > mp->data) {
 608                         char *p = strchr(mp->data, '|');
 609                         if (p)
 610                                 p++;
 611                         switch (mp->data[0]) {
 612                         case 'Z':
 613                                 send_Z = 0;
 614                                 ending++;
 615                                 return;
 616                         case 'E':
 617                                 if (isdigit(*p))
 618                                         in->echo = *p - '0';
 619                                 break;
 620                         case 'B':
 621                                 if (isdigit(*p))
 622                                         in->buffer_it = *p - '0';
 623                                 break;
 624                         case 'D':
 625                                 if (p) {
 626                                         int l = mp->inp - (unsigned char *) p;
 627                                         send_text(in, p, l);
 628                                 }
 629                                 break;
 630                         default:
 631                                 break;
 632                         }
 633                 }
 634                 cmsg_callback(mp, 0);
 635         } else {
 636                 flush_text(in);
 637         }
 638 }
 639
 640 /*
 641  * the program itself....
 642  */
 643
 644 main(int argc, char *argv[])
 645 {
 646         /* set up environment */
 647         {
 648                 char *p = getenv("DXSPIDER_ROOT");
 649                 if (p)
 650                         root = p;
 651                 p = getenv("DXSPIDER_HOST");
 652                 if (p)
 653                         node_addr = p;
 654                 p = getenv("DXSPIDER_PORT");
 655                 if (p)
 656                         node_port = atoi(p);
 657                 p = getenv("DXSPIDER_PACLEN");
 658                 if (p) {
 659                         paclen = atoi(p);
 660                         if (paclen < 80)
 661                                 paclen = 80;
 662                         if (paclen > MAXPACLEN)
 663                                 paclen = MAXPACLEN;
 664                 }
 665         }
 666
 667         /* get program arguments, initialise stuff */
 668         initargs(argc, argv);
 669         sel_init(10, 0, 10000);
 670
 671         /* trap signals */
 672         signal(SIGHUP, SIG_IGN);
 673         signal(SIGINT, terminate);
 674         signal(SIGQUIT, terminate);
 675         signal(SIGTERM, terminate);
 676 #ifdef SIGPWR
 677         signal(SIGPWR, terminate);
 678 #endif
 679
 680         /* compile regexes for iscallsign */
 681         {
 682                 myregex_t *rp;
 683                 for (rp = iscallreg; rp->in; ++rp) {
 684                         regex_t reg;
 685                         int r = regcomp(&reg, rp->in, REG_EXTENDED|REG_ICASE|REG_NOSUB);
 686                         if (r)
 687                                 die("regcomp returned %d for '%s'", r, rp->in);
 688                         rp->regex = malloc(sizeof(regex_t));
 689                         if (!rp->regex)
 690                                 die("out of room - compiling regexes");
 691                         *rp->regex = reg;
 692                 }
 693         }
 694
 695         /* is this a login? */
 696         if (eq(call, "LOGIN")) {
 697                 char buf[MAXPACLEN+1];
 698                 int r;
 699                 int f = xopen("data", "issue", 0);
 700                 if (f > 0) {
 701                         while ((r = read(f, buf, paclen)) > 0) {
 702                                 if (nl != '\n') {
 703                                         char *p;
 704                                         for (p = buf; p < &buf[r]; ++p) {
 705                                                 if (*p == '\n')
 706                                                         *p = nl;
 707                                         }
 708                                 }
 709                                 write(0, buf, r);
 710                         }
 711                         close(f);
 712                 }
 713                 signal(SIGALRM, login_timeout);
 714                 alarm(timeout);
 715                 write(0, "login: ", 7);
 716                 r = read(0, buf, 20);
 717                 if (r <= 0)
 718                         die("No login or error (%d)", errno);
 719                 signal(SIGALRM, SIG_IGN);
 720                 alarm(0);
 721                 while (r > 0) {
 722                         if (buf[r-1] == ' ' || buf[r-1] == '\r' || buf[r-1] == '\n')
 723                                 --r;
 724                         else
 725                                 break;
 726                 }
 727                 buf[r] = 0;
 728                 call = strupper(buf);
 729         }
 730
 731         /* check the callsign */
 732         if (!iscallsign(call)) {
 733                 die("Sorry, %s isn't a valid callsign", call);
 734         }
 735
 736         /* connect up stdin */
 737         in = fcb_new(0, TEXT);
 738         in->sp = sel_open(0, in, "STDIN", fcb_handler, TEXT, SEL_INPUT);
 739         if (tcgetattr(0, &in->t) < 0) {
 740                 echo = 0;
 741                 in->t_set = 0;
 742         } else {
 743                 struct termios t = in->t;
 744                 t.c_lflag &= ~(ECHO|ECHONL|ICANON);
 745                 if (tcsetattr(0, TCSANOW, &t) < 0)
 746                         die("tcsetattr (%d)", errno);
 747                 in->echo = echo;
 748                 in->t_set = 1;
 749         }
 750         in->buffer_it = 1;
 751
 752         /* connect up node */
 753         connect_to_node();
 754
 755         /* tell the cluster who I am */
 756         send_msg(node, 'A', connsort, strlen(connsort));
 757
 758         /* main processing loop */
 759         while (!ending) {
 760                 sel_run();
 761                 if (!ending) {
 762                         process_stdin();
 763                         process_node();
 764                 }
 765         }
 766         terminate(0);
 767 }
 768
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