2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.30 1999-04-20 09:56:48 adam
8 * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
9 * Modified all encoders/decoders to reflect this change.
11 * Revision 1.29 1999/04/16 14:45:55 adam
12 * Added interface for tcpd wrapper for access control.
14 * Revision 1.28 1999/03/31 11:11:14 adam
15 * Function getprotobyname only called once. Minor change in tcpip_get
16 * to handle multi-threaded conditions.
18 * Revision 1.27 1999/02/02 13:57:31 adam
19 * Uses preprocessor define WIN32 instead of WINDOWS to build code
20 * for Microsoft WIN32.
22 * Revision 1.26 1999/01/08 11:23:14 adam
23 * Added const modifier to some of the BER/ODR encoding routines.
25 * Revision 1.25 1998/07/07 15:49:23 adam
26 * Added braces to avoid warning.
28 * Revision 1.24 1998/06/29 07:59:17 adam
31 * Revision 1.23 1998/06/23 15:37:50 adam
32 * Added type cast to prevent warning.
34 * Revision 1.22 1998/06/22 11:32:36 adam
35 * Added 'conditional cs_listen' feature.
37 * Revision 1.21 1998/05/20 09:55:32 adam
38 * Function tcpip_get treats EINPROGRESS error in the same way as
39 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
40 * Solaris in some cases.
42 * Revision 1.20 1998/05/18 10:10:40 adam
43 * Minor change to avoid C++ warning.
45 * Revision 1.19 1998/02/11 11:53:33 adam
46 * Changed code so that it compiles as C++.
48 * Revision 1.18 1997/09/29 07:15:25 adam
49 * Changed use of setsockopt to avoid warnings on MSVC.
51 * Revision 1.17 1997/09/17 12:10:30 adam
54 * Revision 1.16 1997/09/01 08:49:14 adam
55 * New windows NT/95 port using MSV5.0. Minor changes only.
57 * Revision 1.15 1997/05/14 06:53:33 adam
60 * Revision 1.14 1997/05/01 15:06:32 adam
61 * Moved WINSOCK init. code to tcpip_init routine.
63 * Revision 1.13 1996/11/01 08:45:18 adam
64 * Bug fix: used close on MS-Windows. Fixed to closesocket.
66 * Revision 1.12 1996/07/06 19:58:30 quinn
67 * System headerfiles gathered in yconfig
69 * Revision 1.11 1996/02/23 10:00:39 quinn
72 * Revision 1.10 1996/02/20 12:52:11 quinn
73 * WAIS protocol support.
75 * Revision 1.9 1996/02/10 12:23:11 quinn
76 * Enablie inetd operations fro TCP/IP stack
78 * Revision 1.8 1995/11/01 13:54:27 quinn
81 * Revision 1.7 1995/10/30 12:41:16 quinn
82 * Added hostname lookup for server.
84 * Revision 1.6 1995/09/29 17:12:00 quinn
87 * Revision 1.5 1995/09/29 17:01:48 quinn
90 * Revision 1.4 1995/09/28 10:12:26 quinn
91 * Windows-support changes
93 * Revision 1.3 1995/09/27 15:02:45 quinn
94 * Modified function heads & prototypes.
96 * Revision 1.2 1995/06/15 12:30:06 quinn
97 * Added @ as hostname alias for INADDR ANY.
99 * Revision 1.1 1995/06/14 09:58:20 quinn
100 * Renamed yazlib to comstack.
102 * Revision 1.20 1995/05/16 08:51:16 quinn
103 * License, documentation, and memory fixes
105 * Revision 1.19 1995/04/10 10:24:08 quinn
108 * Revision 1.18 1995/03/30 13:29:27 quinn
109 * Added REUSEADDR in tcpip_bind
111 * Revision 1.17 1995/03/27 08:36:10 quinn
112 * Some work on nonblocking operation in xmosi.c and rfct.c.
113 * Added protocol parameter to cs_create()
115 * Revision 1.16 1995/03/21 15:53:41 quinn
118 * Revision 1.15 1995/03/21 12:31:27 quinn
119 * Added check for EINPROGRESS on connect.
121 * Revision 1.14 1995/03/20 09:47:21 quinn
122 * Added server-side support to xmosi.c
123 * Fixed possible problems in rfct
126 * Revision 1.13 1995/03/15 16:15:13 adam
129 * Revision 1.12 1995/03/15 15:36:27 quinn
130 * Mods to support nonblocking I/O
132 * Revision 1.11 1995/03/15 08:37:57 quinn
133 * Now we're pretty much set for nonblocking I/O.
135 * Revision 1.10 1995/03/14 17:00:07 quinn
136 * Bug-fixes - added tracing info to tcpip.c
138 * Revision 1.9 1995/03/14 10:28:42 quinn
139 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
141 * Revision 1.8 1995/03/10 14:22:50 quinn
142 * Removed debug output.
144 * Revision 1.7 1995/03/10 11:44:59 quinn
145 * Fixes and debugging
147 * Revision 1.6 1995/03/07 10:26:55 quinn
148 * Initialized type field in the comstacks.
150 * Revision 1.5 1995/02/14 20:40:07 quinn
153 * Revision 1.4 1995/02/14 11:54:49 quinn
154 * Beginning to add full CCL.
156 * Revision 1.3 1995/02/10 18:58:10 quinn
157 * Fixed tcpip_get (formerly tcpip_read).
158 * Turned tst (cli) into a proper, event-driven thingy.
160 * Revision 1.2 1995/02/10 15:55:47 quinn
163 * Revision 1.1 1995/02/09 15:51:52 quinn
177 #include <comstack.h>
181 /* Chas added the following, so we get the definition of completeBER */
184 int tcpip_close(COMSTACK h);
185 int tcpip_put(COMSTACK h, char *buf, int size);
186 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
187 int tcpip_connect(COMSTACK h, void *address);
188 int tcpip_more(COMSTACK h);
189 int tcpip_rcvconnect(COMSTACK h);
190 int tcpip_bind(COMSTACK h, void *address, int mode);
191 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
192 int (*check_ip)(void *cd, const char *a, int len, int type),
195 COMSTACK tcpip_accept(COMSTACK h);
196 char *tcpip_addrstr(COMSTACK h);
197 void *tcpip_straddr(COMSTACK h, const char *str);
206 typedef struct tcpip_state
208 char *altbuf; /* alternate buffer for surplus data */
209 int altsize; /* size as xmalloced */
210 int altlen; /* length of data or 0 if none */
212 int written; /* -1 if we aren't writing */
213 int towrite; /* to verify against user input */
214 int (*complete)(const unsigned char *buf, int len); /* length/comple. */
215 struct sockaddr_in addr; /* returned by cs_straddr */
216 char buf[128]; /* returned by cs_addrstr */
220 static int tcpip_init (void)
222 static int initialized = 0;
228 requested = MAKEWORD(1, 1);
229 if (WSAStartup(requested, &wd))
237 static int proto_number = 0;
239 static int tcpip_init (void)
241 struct protoent *proto;
242 /* only call getprotobyname once, in case it allocates memory */
243 if (!(proto = getprotobyname("tcp")))
245 proto_number = proto->p_proto;
250 * This function is always called through the cs_create() macro.
251 * s >= 0: socket has already been established for us.
253 COMSTACK tcpip_type(int s, int blocking, int protocol)
259 unsigned long tru = 1;
267 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
270 if ((s = socket(AF_INET, SOCK_STREAM, proto_number)) < 0)
277 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
279 if (!(state = (struct tcpip_state *)(p->cprivate =
280 xmalloc(sizeof(tcpip_state)))))
284 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
286 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
291 p->type = tcpip_type;
292 p->protocol = (enum oid_proto) protocol;
294 p->f_connect = tcpip_connect;
295 p->f_rcvconnect = tcpip_rcvconnect;
296 p->f_get = tcpip_get;
297 p->f_put = tcpip_put;
298 p->f_close = tcpip_close;
299 p->f_more = tcpip_more;
300 p->f_bind = tcpip_bind;
301 p->f_listen = tcpip_listen;
302 p->f_accept = tcpip_accept;
303 p->f_addrstr = tcpip_addrstr;
304 p->f_straddr = tcpip_straddr;
306 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
312 state->altsize = state->altlen = 0;
313 state->towrite = state->written = -1;
314 if (protocol == PROTO_WAIS)
315 state->complete = completeWAIS;
317 state->complete = completeBER;
319 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
320 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
325 int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
329 short int port = 210;
334 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
335 add->sin_family = AF_INET;
337 if ((p = strchr(buf, ':')))
342 add->sin_port = htons(port);
343 if (!strcmp("@", buf))
344 add->sin_addr.s_addr = INADDR_ANY;
345 else if ((hp = gethostbyname(buf)))
346 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
347 sizeof(struct in_addr));
348 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
349 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
355 void *tcpip_straddr(COMSTACK h, const char *str)
357 tcpip_state *sp = (tcpip_state *)h->cprivate;
359 if (!tcpip_strtoaddr_ex (str, &sp->addr))
364 struct sockaddr_in *tcpip_strtoaddr(const char *str)
366 static struct sockaddr_in add;
368 if (!tcpip_strtoaddr_ex (str, &add))
373 int tcpip_more(COMSTACK h)
375 tcpip_state *sp = (tcpip_state *)h->cprivate;
377 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
382 * connect(2) will block (sometimes) - nothing we can do short of doing
383 * weird things like spawning subprocesses or threading or some weird junk
386 int tcpip_connect(COMSTACK h, void *address)
388 struct sockaddr_in *add = (struct sockaddr_in *)address;
390 TRC(fprintf(stderr, "tcpip_connect\n"));
391 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
394 if (WSAGetLastError() == WSAEWOULDBLOCK)
396 if (errno == EINPROGRESS)
401 h->state = CS_DATAXFER;
408 int tcpip_rcvconnect(COMSTACK h)
410 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
414 int tcpip_bind(COMSTACK h, void *address, int mode)
416 struct sockaddr *addr = (struct sockaddr *)address;
420 unsigned long one = 1;
423 TRC(fprintf(stderr, "tcpip_bind\n"));
424 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
425 &one, sizeof(one)) < 0)
430 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
435 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
444 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
445 int (*check_ip)(void *cd, const char *a, int len, int t),
448 struct sockaddr_in addr;
449 int len = sizeof(addr);
451 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
452 if (h->state != CS_IDLE)
454 h->cerrno = CSOUTSTATE;
457 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
460 if (WSAGetLastError() == WSAEWOULDBLOCK)
462 if (errno == EWOULDBLOCK)
465 h->cerrno = CSNODATA;
470 if (addrlen && (size_t) (*addrlen) >= sizeof(struct sockaddr_in))
471 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
474 if (check_ip && (*check_ip)(cd, (const char *) &addr,
475 sizeof(addr), AF_INET))
479 closesocket(h->newfd);
489 COMSTACK tcpip_accept(COMSTACK h)
492 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
494 unsigned long tru = 1;
497 TRC(fprintf(stderr, "tcpip_accept\n"));
498 if (h->state != CS_INCON)
500 h->cerrno = CSOUTSTATE;
503 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
508 memcpy(cnew, h, sizeof(*h));
509 cnew->iofile = h->newfd;
510 if (!(state = (tcpip_state *)
511 (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
517 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
519 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
523 state->altsize = state->altlen = 0;
524 state->towrite = state->written = -1;
525 state->complete = st->complete;
526 cnew->state = CS_DATAXFER;
531 #define CS_TCPIP_BUFCHUNK 4096
534 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
535 * 0=connection closed.
537 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
539 tcpip_state *sp = (tcpip_state *)h->cprivate;
541 int tmpi, berlen, rest, req, tomove;
542 int hasread = 0, res;
544 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
545 if (sp->altlen) /* switch buffers */
547 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
548 (unsigned) sp->altbuf));
552 *bufsize = sp->altsize;
553 hasread = sp->altlen;
558 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
562 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
565 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
566 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
568 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
571 if (WSAGetLastError() == WSAEWOULDBLOCK)
576 if (errno == EWOULDBLOCK
578 || errno == EINPROGRESS
591 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
593 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
595 /* move surplus buffer (or everything if we didn't get a BER rec.) */
596 if (hasread > berlen)
598 tomove = req = hasread - berlen;
599 rest = tomove % CS_TCPIP_BUFCHUNK;
601 req += CS_TCPIP_BUFCHUNK - rest;
604 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
606 } else if (sp->altsize < req)
607 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
609 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
610 (unsigned) sp->altbuf));
611 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
613 if (berlen < CS_TCPIP_BUFCHUNK - 1)
614 *(*buf + berlen) = '\0';
615 return berlen ? berlen : 1;
620 * In nonblocking mode, you must call again with same buffer while
623 int tcpip_put(COMSTACK h, char *buf, int size)
626 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
628 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
629 if (state->towrite < 0)
631 state->towrite = size;
634 else if (state->towrite != size)
636 h->cerrno = CSWRONGBUF;
639 while (state->towrite > state->written)
641 if ((res = send(h->iofile, buf + state->written, size -
642 state->written, 0)) < 0)
645 if (WSAGetLastError() == WSAEWOULDBLOCK)
650 TRC(fprintf(stderr, " Flow control stop\n"));
656 state->written += res;
657 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
658 res, state->written, size));
660 state->towrite = state->written = -1;
661 TRC(fprintf(stderr, " Ok\n"));
665 int tcpip_close(COMSTACK h)
667 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
669 TRC(fprintf(stderr, "tcpip_close\n"));
672 closesocket(h->iofile);
683 char *tcpip_addrstr(COMSTACK h)
685 struct sockaddr_in addr;
686 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
687 char *r, *buf = sp->buf;
689 struct hostent *host;
692 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
697 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
699 r = (char*) host->h_name;
701 r = inet_ntoa(addr.sin_addr);
702 sprintf(buf, "tcp:%s", r);