2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.29 1999-04-16 14:45:55 adam
8 * Added interface for tcpd wrapper for access control.
10 * Revision 1.28 1999/03/31 11:11:14 adam
11 * Function getprotobyname only called once. Minor change in tcpip_get
12 * to handle multi-threaded conditions.
14 * Revision 1.27 1999/02/02 13:57:31 adam
15 * Uses preprocessor define WIN32 instead of WINDOWS to build code
16 * for Microsoft WIN32.
18 * Revision 1.26 1999/01/08 11:23:14 adam
19 * Added const modifier to some of the BER/ODR encoding routines.
21 * Revision 1.25 1998/07/07 15:49:23 adam
22 * Added braces to avoid warning.
24 * Revision 1.24 1998/06/29 07:59:17 adam
27 * Revision 1.23 1998/06/23 15:37:50 adam
28 * Added type cast to prevent warning.
30 * Revision 1.22 1998/06/22 11:32:36 adam
31 * Added 'conditional cs_listen' feature.
33 * Revision 1.21 1998/05/20 09:55:32 adam
34 * Function tcpip_get treats EINPROGRESS error in the same way as
35 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
36 * Solaris in some cases.
38 * Revision 1.20 1998/05/18 10:10:40 adam
39 * Minor change to avoid C++ warning.
41 * Revision 1.19 1998/02/11 11:53:33 adam
42 * Changed code so that it compiles as C++.
44 * Revision 1.18 1997/09/29 07:15:25 adam
45 * Changed use of setsockopt to avoid warnings on MSVC.
47 * Revision 1.17 1997/09/17 12:10:30 adam
50 * Revision 1.16 1997/09/01 08:49:14 adam
51 * New windows NT/95 port using MSV5.0. Minor changes only.
53 * Revision 1.15 1997/05/14 06:53:33 adam
56 * Revision 1.14 1997/05/01 15:06:32 adam
57 * Moved WINSOCK init. code to tcpip_init routine.
59 * Revision 1.13 1996/11/01 08:45:18 adam
60 * Bug fix: used close on MS-Windows. Fixed to closesocket.
62 * Revision 1.12 1996/07/06 19:58:30 quinn
63 * System headerfiles gathered in yconfig
65 * Revision 1.11 1996/02/23 10:00:39 quinn
68 * Revision 1.10 1996/02/20 12:52:11 quinn
69 * WAIS protocol support.
71 * Revision 1.9 1996/02/10 12:23:11 quinn
72 * Enablie inetd operations fro TCP/IP stack
74 * Revision 1.8 1995/11/01 13:54:27 quinn
77 * Revision 1.7 1995/10/30 12:41:16 quinn
78 * Added hostname lookup for server.
80 * Revision 1.6 1995/09/29 17:12:00 quinn
83 * Revision 1.5 1995/09/29 17:01:48 quinn
86 * Revision 1.4 1995/09/28 10:12:26 quinn
87 * Windows-support changes
89 * Revision 1.3 1995/09/27 15:02:45 quinn
90 * Modified function heads & prototypes.
92 * Revision 1.2 1995/06/15 12:30:06 quinn
93 * Added @ as hostname alias for INADDR ANY.
95 * Revision 1.1 1995/06/14 09:58:20 quinn
96 * Renamed yazlib to comstack.
98 * Revision 1.20 1995/05/16 08:51:16 quinn
99 * License, documentation, and memory fixes
101 * Revision 1.19 1995/04/10 10:24:08 quinn
104 * Revision 1.18 1995/03/30 13:29:27 quinn
105 * Added REUSEADDR in tcpip_bind
107 * Revision 1.17 1995/03/27 08:36:10 quinn
108 * Some work on nonblocking operation in xmosi.c and rfct.c.
109 * Added protocol parameter to cs_create()
111 * Revision 1.16 1995/03/21 15:53:41 quinn
114 * Revision 1.15 1995/03/21 12:31:27 quinn
115 * Added check for EINPROGRESS on connect.
117 * Revision 1.14 1995/03/20 09:47:21 quinn
118 * Added server-side support to xmosi.c
119 * Fixed possible problems in rfct
122 * Revision 1.13 1995/03/15 16:15:13 adam
125 * Revision 1.12 1995/03/15 15:36:27 quinn
126 * Mods to support nonblocking I/O
128 * Revision 1.11 1995/03/15 08:37:57 quinn
129 * Now we're pretty much set for nonblocking I/O.
131 * Revision 1.10 1995/03/14 17:00:07 quinn
132 * Bug-fixes - added tracing info to tcpip.c
134 * Revision 1.9 1995/03/14 10:28:42 quinn
135 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
137 * Revision 1.8 1995/03/10 14:22:50 quinn
138 * Removed debug output.
140 * Revision 1.7 1995/03/10 11:44:59 quinn
141 * Fixes and debugging
143 * Revision 1.6 1995/03/07 10:26:55 quinn
144 * Initialized type field in the comstacks.
146 * Revision 1.5 1995/02/14 20:40:07 quinn
149 * Revision 1.4 1995/02/14 11:54:49 quinn
150 * Beginning to add full CCL.
152 * Revision 1.3 1995/02/10 18:58:10 quinn
153 * Fixed tcpip_get (formerly tcpip_read).
154 * Turned tst (cli) into a proper, event-driven thingy.
156 * Revision 1.2 1995/02/10 15:55:47 quinn
159 * Revision 1.1 1995/02/09 15:51:52 quinn
173 #include <comstack.h>
177 /* Chas added the following, so we get the definition of completeBER */
180 int tcpip_close(COMSTACK h);
181 int tcpip_put(COMSTACK h, char *buf, int size);
182 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
183 int tcpip_connect(COMSTACK h, void *address);
184 int tcpip_more(COMSTACK h);
185 int tcpip_rcvconnect(COMSTACK h);
186 int tcpip_bind(COMSTACK h, void *address, int mode);
187 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
188 int (*check_ip)(void *cd, const char *a, int len, int type),
191 COMSTACK tcpip_accept(COMSTACK h);
192 char *tcpip_addrstr(COMSTACK h);
193 void *tcpip_straddr(COMSTACK h, const char *str);
202 typedef struct tcpip_state
204 char *altbuf; /* alternate buffer for surplus data */
205 int altsize; /* size as xmalloced */
206 int altlen; /* length of data or 0 if none */
208 int written; /* -1 if we aren't writing */
209 int towrite; /* to verify against user input */
210 int (*complete)(const unsigned char *buf, int len); /* length/comple. */
211 struct sockaddr_in addr; /* returned by cs_straddr */
212 char buf[128]; /* returned by cs_addrstr */
216 static int tcpip_init (void)
218 static int initialized = 0;
224 requested = MAKEWORD(1, 1);
225 if (WSAStartup(requested, &wd))
233 static int proto_number = 0;
235 static int tcpip_init (void)
237 struct protoent *proto;
238 /* only call getprotobyname once, in case it allocates memory */
239 if (!(proto = getprotobyname("tcp")))
241 proto_number = proto->p_proto;
246 * This function is always called through the cs_create() macro.
247 * s >= 0: socket has already been established for us.
249 COMSTACK tcpip_type(int s, int blocking, int protocol)
255 unsigned long tru = 1;
263 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
266 if ((s = socket(AF_INET, SOCK_STREAM, proto_number)) < 0)
273 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
275 if (!(state = (struct tcpip_state *)(p->cprivate =
276 xmalloc(sizeof(tcpip_state)))))
280 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
282 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
287 p->type = tcpip_type;
288 p->protocol = (enum oid_proto) protocol;
290 p->f_connect = tcpip_connect;
291 p->f_rcvconnect = tcpip_rcvconnect;
292 p->f_get = tcpip_get;
293 p->f_put = tcpip_put;
294 p->f_close = tcpip_close;
295 p->f_more = tcpip_more;
296 p->f_bind = tcpip_bind;
297 p->f_listen = tcpip_listen;
298 p->f_accept = tcpip_accept;
299 p->f_addrstr = tcpip_addrstr;
300 p->f_straddr = tcpip_straddr;
302 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
308 state->altsize = state->altlen = 0;
309 state->towrite = state->written = -1;
310 if (protocol == PROTO_WAIS)
311 state->complete = completeWAIS;
313 state->complete = completeBER;
315 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
316 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
321 int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
325 short int port = 210;
330 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
331 add->sin_family = AF_INET;
333 if ((p = strchr(buf, ':')))
338 add->sin_port = htons(port);
339 if (!strcmp("@", buf))
340 add->sin_addr.s_addr = INADDR_ANY;
341 else if ((hp = gethostbyname(buf)))
342 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
343 sizeof(struct in_addr));
344 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
345 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
351 void *tcpip_straddr(COMSTACK h, const char *str)
353 tcpip_state *sp = (tcpip_state *)h->cprivate;
355 if (!tcpip_strtoaddr_ex (str, &sp->addr))
360 struct sockaddr_in *tcpip_strtoaddr(const char *str)
362 static struct sockaddr_in add;
364 if (!tcpip_strtoaddr_ex (str, &add))
369 int tcpip_more(COMSTACK h)
371 tcpip_state *sp = (tcpip_state *)h->cprivate;
373 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
378 * connect(2) will block (sometimes) - nothing we can do short of doing
379 * weird things like spawning subprocesses or threading or some weird junk
382 int tcpip_connect(COMSTACK h, void *address)
384 struct sockaddr_in *add = (struct sockaddr_in *)address;
386 TRC(fprintf(stderr, "tcpip_connect\n"));
387 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
390 if (WSAGetLastError() == WSAEWOULDBLOCK)
392 if (errno == EINPROGRESS)
397 h->state = CS_DATAXFER;
404 int tcpip_rcvconnect(COMSTACK h)
406 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
410 int tcpip_bind(COMSTACK h, void *address, int mode)
412 struct sockaddr *addr = (struct sockaddr *)address;
416 unsigned long one = 1;
419 logf (LOG_LOG, "tcpip_bind");
420 TRC(fprintf(stderr, "tcpip_bind\n"));
421 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
422 &one, sizeof(one)) < 0)
427 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
432 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
441 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
442 int (*check_ip)(void *cd, const char *a, int len, int type),
445 struct sockaddr_in addr;
446 int len = sizeof(addr);
448 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
449 if (h->state != CS_IDLE)
451 h->cerrno = CSOUTSTATE;
454 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
457 if (WSAGetLastError() == WSAEWOULDBLOCK)
459 if (errno == EWOULDBLOCK)
462 h->cerrno = CSNODATA;
467 if (addrlen && *addrlen >= sizeof(struct sockaddr_in))
468 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
471 if (check_ip && (*check_ip)(cd, (const char *) &addr,
472 sizeof(addr), AF_INET))
476 closesocket(h->newfd);
486 COMSTACK tcpip_accept(COMSTACK h)
489 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
491 unsigned long tru = 1;
494 TRC(fprintf(stderr, "tcpip_accept\n"));
495 if (h->state != CS_INCON)
497 h->cerrno = CSOUTSTATE;
500 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
505 memcpy(cnew, h, sizeof(*h));
506 cnew->iofile = h->newfd;
507 if (!(state = (tcpip_state *)
508 (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
514 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
516 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
520 state->altsize = state->altlen = 0;
521 state->towrite = state->written = -1;
522 state->complete = st->complete;
523 cnew->state = CS_DATAXFER;
528 #define CS_TCPIP_BUFCHUNK 4096
531 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
532 * 0=connection closed.
534 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
536 tcpip_state *sp = (tcpip_state *)h->cprivate;
538 int tmpi, berlen, rest, req, tomove;
539 int hasread = 0, res;
541 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
542 if (sp->altlen) /* switch buffers */
544 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
545 (unsigned) sp->altbuf));
549 *bufsize = sp->altsize;
550 hasread = sp->altlen;
555 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
559 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
562 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
563 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
565 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
568 if (WSAGetLastError() == WSAEWOULDBLOCK)
573 if (errno == EWOULDBLOCK
575 || errno == EINPROGRESS
588 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
590 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
592 /* move surplus buffer (or everything if we didn't get a BER rec.) */
593 if (hasread > berlen)
595 tomove = req = hasread - berlen;
596 rest = tomove % CS_TCPIP_BUFCHUNK;
598 req += CS_TCPIP_BUFCHUNK - rest;
601 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
603 } else if (sp->altsize < req)
604 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
606 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
607 (unsigned) sp->altbuf));
608 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
610 if (berlen < CS_TCPIP_BUFCHUNK - 1)
611 *(*buf + berlen) = '\0';
612 return berlen ? berlen : 1;
617 * In nonblocking mode, you must call again with same buffer while
620 int tcpip_put(COMSTACK h, char *buf, int size)
623 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
625 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
626 if (state->towrite < 0)
628 state->towrite = size;
631 else if (state->towrite != size)
633 h->cerrno = CSWRONGBUF;
636 while (state->towrite > state->written)
638 if ((res = send(h->iofile, buf + state->written, size -
639 state->written, 0)) < 0)
642 if (WSAGetLastError() == WSAEWOULDBLOCK)
647 TRC(fprintf(stderr, " Flow control stop\n"));
653 state->written += res;
654 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
655 res, state->written, size));
657 state->towrite = state->written = -1;
658 TRC(fprintf(stderr, " Ok\n"));
662 int tcpip_close(COMSTACK h)
664 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
666 TRC(fprintf(stderr, "tcpip_close\n"));
669 closesocket(h->iofile);
680 char *tcpip_addrstr(COMSTACK h)
682 struct sockaddr_in addr;
683 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
684 char *r, *buf = sp->buf;
686 struct hostent *host;
689 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
694 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
696 r = (char*) host->h_name;
698 r = inet_ntoa(addr.sin_addr);
699 sprintf(buf, "tcp:%s", r);