2 * Copyright (c) 1995-1998, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.21 1998-05-20 09:55:32 adam
8 * Function tcpip_get treats EINPROGRESS error in the same way as
9 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
10 * Solaris in some cases.
12 * Revision 1.20 1998/05/18 10:10:40 adam
13 * Minor change to avoid C++ warning.
15 * Revision 1.19 1998/02/11 11:53:33 adam
16 * Changed code so that it compiles as C++.
18 * Revision 1.18 1997/09/29 07:15:25 adam
19 * Changed use of setsockopt to avoid warnings on MSVC.
21 * Revision 1.17 1997/09/17 12:10:30 adam
24 * Revision 1.16 1997/09/01 08:49:14 adam
25 * New windows NT/95 port using MSV5.0. Minor changes only.
27 * Revision 1.15 1997/05/14 06:53:33 adam
30 * Revision 1.14 1997/05/01 15:06:32 adam
31 * Moved WINSOCK init. code to tcpip_init routine.
33 * Revision 1.13 1996/11/01 08:45:18 adam
34 * Bug fix: used close on MS-Windows. Fixed to closesocket.
36 * Revision 1.12 1996/07/06 19:58:30 quinn
37 * System headerfiles gathered in yconfig
39 * Revision 1.11 1996/02/23 10:00:39 quinn
42 * Revision 1.10 1996/02/20 12:52:11 quinn
43 * WAIS protocol support.
45 * Revision 1.9 1996/02/10 12:23:11 quinn
46 * Enablie inetd operations fro TCP/IP stack
48 * Revision 1.8 1995/11/01 13:54:27 quinn
51 * Revision 1.7 1995/10/30 12:41:16 quinn
52 * Added hostname lookup for server.
54 * Revision 1.6 1995/09/29 17:12:00 quinn
57 * Revision 1.5 1995/09/29 17:01:48 quinn
60 * Revision 1.4 1995/09/28 10:12:26 quinn
61 * Windows-support changes
63 * Revision 1.3 1995/09/27 15:02:45 quinn
64 * Modified function heads & prototypes.
66 * Revision 1.2 1995/06/15 12:30:06 quinn
67 * Added @ as hostname alias for INADDR ANY.
69 * Revision 1.1 1995/06/14 09:58:20 quinn
70 * Renamed yazlib to comstack.
72 * Revision 1.20 1995/05/16 08:51:16 quinn
73 * License, documentation, and memory fixes
75 * Revision 1.19 1995/04/10 10:24:08 quinn
78 * Revision 1.18 1995/03/30 13:29:27 quinn
79 * Added REUSEADDR in tcpip_bind
81 * Revision 1.17 1995/03/27 08:36:10 quinn
82 * Some work on nonblocking operation in xmosi.c and rfct.c.
83 * Added protocol parameter to cs_create()
85 * Revision 1.16 1995/03/21 15:53:41 quinn
88 * Revision 1.15 1995/03/21 12:31:27 quinn
89 * Added check for EINPROGRESS on connect.
91 * Revision 1.14 1995/03/20 09:47:21 quinn
92 * Added server-side support to xmosi.c
93 * Fixed possible problems in rfct
96 * Revision 1.13 1995/03/15 16:15:13 adam
99 * Revision 1.12 1995/03/15 15:36:27 quinn
100 * Mods to support nonblocking I/O
102 * Revision 1.11 1995/03/15 08:37:57 quinn
103 * Now we're pretty much set for nonblocking I/O.
105 * Revision 1.10 1995/03/14 17:00:07 quinn
106 * Bug-fixes - added tracing info to tcpip.c
108 * Revision 1.9 1995/03/14 10:28:42 quinn
109 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
111 * Revision 1.8 1995/03/10 14:22:50 quinn
112 * Removed debug output.
114 * Revision 1.7 1995/03/10 11:44:59 quinn
115 * Fixes and debugging
117 * Revision 1.6 1995/03/07 10:26:55 quinn
118 * Initialized type field in the comstacks.
120 * Revision 1.5 1995/02/14 20:40:07 quinn
123 * Revision 1.4 1995/02/14 11:54:49 quinn
124 * Beginning to add full CCL.
126 * Revision 1.3 1995/02/10 18:58:10 quinn
127 * Fixed tcpip_get (formerly tcpip_read).
128 * Turned tst (cli) into a proper, event-driven thingy.
130 * Revision 1.2 1995/02/10 15:55:47 quinn
133 * Revision 1.1 1995/02/09 15:51:52 quinn
147 #include <comstack.h>
150 /* Chas added the following 2, so we get the definition of completeBER */
154 int tcpip_close(COMSTACK h);
155 int tcpip_put(COMSTACK h, char *buf, int size);
156 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
157 int tcpip_connect(COMSTACK h, void *address);
158 int tcpip_more(COMSTACK h);
159 int tcpip_rcvconnect(COMSTACK h);
160 int tcpip_bind(COMSTACK h, void *address, int mode);
161 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
162 COMSTACK tcpip_accept(COMSTACK h);
163 char *tcpip_addrstr(COMSTACK h);
164 void *tcpip_straddr(COMSTACK h, const char *str);
167 * Determine length/completeness of incoming packages
169 /* Chas: Removed the definition of completeBERfrom here, use the one in the */
170 /* include directory as that as the extern "C" around it */
171 /*int completeBER(unsigned char *buf, int len); */ /* from the ODR module */
172 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
180 typedef struct tcpip_state
182 char *altbuf; /* alternate buffer for surplus data */
183 int altsize; /* size as xmalloced */
184 int altlen; /* length of data or 0 if none */
186 int written; /* -1 if we aren't writing */
187 int towrite; /* to verify against user input */
188 int (*complete)(unsigned char *buf, int len); /* length/completeness */
189 struct sockaddr_in addr; /* returned by cs_straddr */
190 char buf[128]; /* returned by cs_addrstr */
194 static int tcpip_init (void)
196 static int initialized = 0;
202 requested = MAKEWORD(1, 1);
203 if (WSAStartup(requested, &wd))
210 static int tcpip_init (void)
216 * This function is always called through the cs_create() macro.
217 * s >= 0: socket has already been established for us.
219 COMSTACK tcpip_type(int s, int blocking, int protocol)
225 unsigned long tru = 1;
227 struct protoent *proto;
235 if (!(proto = getprotobyname("tcp")))
237 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
239 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
246 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
248 if (!(state = (struct tcpip_state *)(p->cprivate =
249 xmalloc(sizeof(tcpip_state)))))
253 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
255 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
260 p->type = tcpip_type;
261 p->protocol = (enum oid_proto) protocol;
263 p->f_connect = tcpip_connect;
264 p->f_rcvconnect = tcpip_rcvconnect;
265 p->f_get = tcpip_get;
266 p->f_put = tcpip_put;
267 p->f_close = tcpip_close;
268 p->f_more = tcpip_more;
269 p->f_bind = tcpip_bind;
270 p->f_listen = tcpip_listen;
271 p->f_accept = tcpip_accept;
272 p->f_addrstr = tcpip_addrstr;
273 p->f_straddr = tcpip_straddr;
275 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
281 state->altsize = state->altlen = 0;
282 state->towrite = state->written = -1;
283 if (protocol == PROTO_WAIS)
284 state->complete = completeWAIS;
286 state->complete = completeBER;
288 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
289 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
294 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
298 short int port = 210;
303 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
304 add->sin_family = AF_INET;
306 if ((p = strchr(buf, ':')))
311 add->sin_port = htons(port);
312 if (!strcmp("@", buf))
313 add->sin_addr.s_addr = INADDR_ANY;
314 else if ((hp = gethostbyname(buf)))
315 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
316 sizeof(struct in_addr));
317 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
318 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
324 void *tcpip_straddr(COMSTACK h, const char *str)
326 tcpip_state *sp = (tcpip_state *)h->cprivate;
328 if (!tcpip_strtoaddr_ex (str, &sp->addr))
333 struct sockaddr_in *tcpip_strtoaddr(const char *str)
335 static struct sockaddr_in add;
337 if (!tcpip_strtoaddr_ex (str, &add))
342 int tcpip_more(COMSTACK h)
344 tcpip_state *sp = (tcpip_state *)h->cprivate;
346 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
351 * connect(2) will block (sometimes) - nothing we can do short of doing
352 * weird things like spawning subprocesses or threading or some weird junk
355 int tcpip_connect(COMSTACK h, void *address)
357 struct sockaddr_in *add = (struct sockaddr_in *)address;
359 TRC(fprintf(stderr, "tcpip_connect\n"));
360 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
363 if (WSAGetLastError() == WSAEWOULDBLOCK)
365 if (errno == EINPROGRESS)
370 h->state = CS_DATAXFER;
377 int tcpip_rcvconnect(COMSTACK h)
379 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
383 int tcpip_bind(COMSTACK h, void *address, int mode)
385 struct sockaddr *addr = (struct sockaddr *)address;
389 unsigned long one = 1;
392 TRC(fprintf(stderr, "tcpip_bind\n"));
393 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
394 &one, sizeof(one)) < 0)
399 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
404 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
413 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
415 struct sockaddr_in addr;
416 int len = sizeof(addr);
418 TRC(fprintf(stderr, "tcpip_listen\n"));
419 if (h->state != CS_IDLE)
421 h->cerrno = CSOUTSTATE;
424 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
427 if (WSAGetLastError() == WSAEWOULDBLOCK)
429 if (errno == EWOULDBLOCK)
432 h->cerrno = CSNODATA;
437 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
438 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
445 COMSTACK tcpip_accept(COMSTACK h)
448 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
450 unsigned long tru = 1;
453 TRC(fprintf(stderr, "tcpip_accept\n"));
454 if (h->state != CS_INCON)
456 h->cerrno = CSOUTSTATE;
459 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
464 memcpy(cnew, h, sizeof(*h));
465 cnew->iofile = h->newfd;
466 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
472 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
474 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
478 state->altsize = state->altlen = 0;
479 state->towrite = state->written = -1;
480 state->complete = st->complete;
481 cnew->state = CS_DATAXFER;
486 #define CS_TCPIP_BUFCHUNK 4096
489 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
490 * 0=connection closed.
492 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
494 tcpip_state *sp = (tcpip_state *)h->cprivate;
496 int tmpi, berlen, rest, req, tomove;
497 int hasread = 0, res;
499 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
500 if (sp->altlen) /* switch buffers */
502 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
503 (unsigned) sp->altbuf));
507 *bufsize = sp->altsize;
508 hasread = sp->altlen;
513 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
517 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
520 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
521 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
523 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
525 if (WSAGetLastError() == WSAEWOULDBLOCK)
528 if (errno == EINPROGRESS || errno == EWOULDBLOCK)
530 if (errno == EWOULDBLOCK)
539 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
541 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
543 /* move surplus buffer (or everything if we didn't get a BER rec.) */
544 if (hasread > berlen)
546 tomove = req = hasread - berlen;
547 rest = tomove % CS_TCPIP_BUFCHUNK;
549 req += CS_TCPIP_BUFCHUNK - rest;
552 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
554 } else if (sp->altsize < req)
555 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
557 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
558 (unsigned) sp->altbuf));
559 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
561 if (berlen < CS_TCPIP_BUFCHUNK - 1)
562 *(*buf + berlen) = '\0';
563 return berlen ? berlen : 1;
568 * In nonblocking mode, you must call again with same buffer while
571 int tcpip_put(COMSTACK h, char *buf, int size)
574 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
576 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
577 if (state->towrite < 0)
579 state->towrite = size;
582 else if (state->towrite != size)
584 h->cerrno = CSWRONGBUF;
587 while (state->towrite > state->written)
589 if ((res = send(h->iofile, buf + state->written, size -
590 state->written, 0)) < 0)
593 if (WSAGetLastError() == WSAEWOULDBLOCK)
598 TRC(fprintf(stderr, " Flow control stop\n"));
604 state->written += res;
605 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
606 res, state->written, size));
608 state->towrite = state->written = -1;
609 TRC(fprintf(stderr, " Ok\n"));
613 int tcpip_close(COMSTACK h)
615 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
617 TRC(fprintf(stderr, "tcpip_close\n"));
620 closesocket(h->iofile);
631 char *tcpip_addrstr(COMSTACK h)
633 struct sockaddr_in addr;
634 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
635 char *r, *buf = sp->buf;
637 struct hostent *host;
640 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
645 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
647 r = (char*) host->h_name;
649 r = inet_ntoa(addr.sin_addr);
650 sprintf(buf, "tcp:%s", r);