2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.12 1996-07-06 19:58:30 quinn
8 * System headerfiles gathered in yconfig
10 * Revision 1.11 1996/02/23 10:00:39 quinn
13 * Revision 1.10 1996/02/20 12:52:11 quinn
14 * WAIS protocol support.
16 * Revision 1.9 1996/02/10 12:23:11 quinn
17 * Enablie inetd operations fro TCP/IP stack
19 * Revision 1.8 1995/11/01 13:54:27 quinn
22 * Revision 1.7 1995/10/30 12:41:16 quinn
23 * Added hostname lookup for server.
25 * Revision 1.6 1995/09/29 17:12:00 quinn
28 * Revision 1.5 1995/09/29 17:01:48 quinn
31 * Revision 1.4 1995/09/28 10:12:26 quinn
32 * Windows-support changes
34 * Revision 1.3 1995/09/27 15:02:45 quinn
35 * Modified function heads & prototypes.
37 * Revision 1.2 1995/06/15 12:30:06 quinn
38 * Added @ as hostname alias for INADDR ANY.
40 * Revision 1.1 1995/06/14 09:58:20 quinn
41 * Renamed yazlib to comstack.
43 * Revision 1.20 1995/05/16 08:51:16 quinn
44 * License, documentation, and memory fixes
46 * Revision 1.19 1995/04/10 10:24:08 quinn
49 * Revision 1.18 1995/03/30 13:29:27 quinn
50 * Added REUSEADDR in tcpip_bind
52 * Revision 1.17 1995/03/27 08:36:10 quinn
53 * Some work on nonblocking operation in xmosi.c and rfct.c.
54 * Added protocol parameter to cs_create()
56 * Revision 1.16 1995/03/21 15:53:41 quinn
59 * Revision 1.15 1995/03/21 12:31:27 quinn
60 * Added check for EINPROGRESS on connect.
62 * Revision 1.14 1995/03/20 09:47:21 quinn
63 * Added server-side support to xmosi.c
64 * Fixed possible problems in rfct
67 * Revision 1.13 1995/03/15 16:15:13 adam
70 * Revision 1.12 1995/03/15 15:36:27 quinn
71 * Mods to support nonblocking I/O
73 * Revision 1.11 1995/03/15 08:37:57 quinn
74 * Now we're pretty much set for nonblocking I/O.
76 * Revision 1.10 1995/03/14 17:00:07 quinn
77 * Bug-fixes - added tracing info to tcpip.c
79 * Revision 1.9 1995/03/14 10:28:42 quinn
80 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
82 * Revision 1.8 1995/03/10 14:22:50 quinn
83 * Removed debug output.
85 * Revision 1.7 1995/03/10 11:44:59 quinn
88 * Revision 1.6 1995/03/07 10:26:55 quinn
89 * Initialized type field in the comstacks.
91 * Revision 1.5 1995/02/14 20:40:07 quinn
94 * Revision 1.4 1995/02/14 11:54:49 quinn
95 * Beginning to add full CCL.
97 * Revision 1.3 1995/02/10 18:58:10 quinn
98 * Fixed tcpip_get (formerly tcpip_read).
99 * Turned tst (cli) into a proper, event-driven thingy.
101 * Revision 1.2 1995/02/10 15:55:47 quinn
104 * Revision 1.1 1995/02/09 15:51:52 quinn
116 #include <comstack.h>
119 int tcpip_close(COMSTACK h);
120 int tcpip_put(COMSTACK h, char *buf, int size);
121 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
122 int tcpip_connect(COMSTACK h, void *address);
123 int tcpip_more(COMSTACK h);
124 int tcpip_rcvconnect(COMSTACK h);
125 int tcpip_bind(COMSTACK h, void *address, int mode);
126 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
127 COMSTACK tcpip_accept(COMSTACK h);
128 char *tcpip_addrstr(COMSTACK h);
131 * Determine length/completeness of incoming packages
133 int completeBER(unsigned char *buf, int len); /* from the ODR module */
134 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
142 static int initialized = 0;
144 typedef struct tcpip_state
146 char *altbuf; /* alternate buffer for surplus data */
147 int altsize; /* size as xmalloced */
148 int altlen; /* length of data or 0 if none */
150 int written; /* -1 if we aren't writing */
151 int towrite; /* to verify against user input */
152 int (*complete)(unsigned char *buf, int len); /* length/completeness */
156 * This function is always called through the cs_create() macro.
157 * s >= 0: socket has already been established for us.
159 COMSTACK tcpip_type(int s, int blocking, int protocol)
165 unsigned long tru = 1;
167 struct protoent *proto;
176 requested = MAKEWORD(1, 1);
177 if (WSAStartup(requested, &wd))
186 if (!(proto = getprotobyname("tcp")))
188 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
190 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
197 if (!(p = xmalloc(sizeof(struct comstack))))
199 if (!(state = p->private = xmalloc(sizeof(tcpip_state))))
203 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
205 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
210 p->type = tcpip_type;
211 p->protocol = protocol;
213 p->f_connect = tcpip_connect;
214 p->f_rcvconnect = tcpip_rcvconnect;
215 p->f_get = tcpip_get;
216 p->f_put = tcpip_put;
217 p->f_close = tcpip_close;
218 p->f_more = tcpip_more;
219 p->f_bind = tcpip_bind;
220 p->f_listen = tcpip_listen;
221 p->f_accept = tcpip_accept;
222 p->f_addrstr = tcpip_addrstr;
224 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
230 state->altsize = state->altlen = 0;
231 state->towrite = state->written = -1;
232 if (protocol == PROTO_WAIS)
233 state->complete = completeWAIS;
235 state->complete = completeBER;
237 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
238 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
243 struct sockaddr_in *tcpip_strtoaddr(const char *str)
245 static struct sockaddr_in add;
248 short int port = 210;
251 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
252 add.sin_family = AF_INET;
254 if ((p = strchr(buf, ':')))
259 add.sin_port = htons(port);
260 if (!strcmp("@", buf))
261 add.sin_addr.s_addr = INADDR_ANY;
262 else if ((hp = gethostbyname(buf)))
263 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
264 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
265 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
271 int tcpip_more(COMSTACK h)
273 tcpip_state *sp = h->private;
275 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
280 * connect(2) will block (sometimes) - nothing we can do short of doing
281 * weird things like spawning subprocesses or threading or some weird junk
284 int tcpip_connect(COMSTACK h, void *address)
286 struct sockaddr_in *add = address;
288 TRC(fprintf(stderr, "tcpip_connect\n"));
289 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
292 if (WSAGetLastError() == WSAEWOULDBLOCK)
294 if (errno == EINPROGRESS)
299 h->state = CS_DATAXFER;
306 int tcpip_rcvconnect(COMSTACK h)
308 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
312 int tcpip_bind(COMSTACK h, void *address, int mode)
314 struct sockaddr *addr = address;
315 unsigned long one = 1;
317 TRC(fprintf(stderr, "tcpip_bind\n"));
318 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
323 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
328 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
337 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
339 struct sockaddr_in addr;
340 int len = sizeof(addr);
342 TRC(fprintf(stderr, "tcpip_listen\n"));
343 if (h->state != CS_IDLE)
345 h->cerrno = CSOUTSTATE;
348 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
351 if (WSAGetLastError() == WSAEWOULDBLOCK)
353 if (errno == EWOULDBLOCK)
356 h->cerrno = CSNODATA;
361 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
362 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
369 COMSTACK tcpip_accept(COMSTACK h)
372 tcpip_state *state, *st = h->private;
374 unsigned long tru = 1;
377 TRC(fprintf(stderr, "tcpip_accept\n"));
378 if (h->state != CS_INCON)
380 h->cerrno = CSOUTSTATE;
383 if (!(new = xmalloc(sizeof(*new))))
388 memcpy(new, h, sizeof(*h));
389 new->iofile = h->newfd;
390 if (!(state = new->private = xmalloc(sizeof(tcpip_state))))
396 if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
398 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
402 state->altsize = state->altlen = 0;
403 state->towrite = state->written = -1;
404 state->complete = st->complete;
405 new->state = CS_DATAXFER;
410 #define CS_TCPIP_BUFCHUNK 4096
413 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
414 * 0=connection closed.
416 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
418 tcpip_state *sp = h->private;
420 int tmpi, berlen, rest, req, tomove;
421 int hasread = 0, res;
423 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
424 if (sp->altlen) /* switch buffers */
426 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
427 (unsigned) sp->altbuf));
431 *bufsize = sp->altsize;
432 hasread = sp->altlen;
437 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
441 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
444 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
445 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
447 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
449 if (WSAGetLastError() == WSAEWOULDBLOCK)
451 if (errno == EWOULDBLOCK)
459 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
461 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
463 /* move surplus buffer (or everything if we didn't get a BER rec.) */
464 if (hasread > berlen)
466 tomove = req = hasread - berlen;
467 rest = tomove % CS_TCPIP_BUFCHUNK;
469 req += CS_TCPIP_BUFCHUNK - rest;
472 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
474 } else if (sp->altsize < req)
475 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
477 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
478 (unsigned) sp->altbuf));
479 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
481 if (berlen < CS_TCPIP_BUFCHUNK - 1)
482 *(*buf + berlen) = '\0';
483 return berlen ? berlen : 1;
488 * In nonblocking mode, you must call again with same buffer while
491 int tcpip_put(COMSTACK h, char *buf, int size)
494 struct tcpip_state *state = h->private;
496 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
497 if (state->towrite < 0)
499 state->towrite = size;
502 else if (state->towrite != size)
504 h->cerrno = CSWRONGBUF;
507 while (state->towrite > state->written)
509 if ((res = send(h->iofile, buf + state->written, size -
510 state->written, 0)) < 0)
513 if (WSAGetLastError() == WSAEWOULDBLOCK)
518 TRC(fprintf(stderr, " Flow control stop\n"));
524 state->written += res;
525 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
526 res, state->written, size));
528 state->towrite = state->written = -1;
529 TRC(fprintf(stderr, " Ok\n"));
533 int tcpip_close(COMSTACK h)
535 tcpip_state *sp = h->private;
537 TRC(fprintf(stderr, "tcpip_close\n"));
546 char *tcpip_addrstr(COMSTACK h)
548 struct sockaddr_in addr;
552 struct hostent *host;
555 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
560 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
562 r = (char*) host->h_name;
564 r = inet_ntoa(addr.sin_addr);
565 sprintf(buf, "tcp:%s", r);