2 * Copyright (c) 1995-2000, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.33 2000-09-04 08:27:11 adam
8 * Work on error handling for tcpip_accept.
10 * Revision 1.32 1999/11/30 13:47:11 adam
11 * Improved installation. Moved header files to include/yaz.
13 * Revision 1.31 1999/04/29 07:31:23 adam
14 * Changed tcpip_strtoaddr_ex so that only part 'till '/' is considered
17 * Revision 1.30 1999/04/20 09:56:48 adam
18 * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
19 * Modified all encoders/decoders to reflect this change.
21 * Revision 1.29 1999/04/16 14:45:55 adam
22 * Added interface for tcpd wrapper for access control.
24 * Revision 1.28 1999/03/31 11:11:14 adam
25 * Function getprotobyname only called once. Minor change in tcpip_get
26 * to handle multi-threaded conditions.
28 * Revision 1.27 1999/02/02 13:57:31 adam
29 * Uses preprocessor define WIN32 instead of WINDOWS to build code
30 * for Microsoft WIN32.
32 * Revision 1.26 1999/01/08 11:23:14 adam
33 * Added const modifier to some of the BER/ODR encoding routines.
35 * Revision 1.25 1998/07/07 15:49:23 adam
36 * Added braces to avoid warning.
38 * Revision 1.24 1998/06/29 07:59:17 adam
41 * Revision 1.23 1998/06/23 15:37:50 adam
42 * Added type cast to prevent warning.
44 * Revision 1.22 1998/06/22 11:32:36 adam
45 * Added 'conditional cs_listen' feature.
47 * Revision 1.21 1998/05/20 09:55:32 adam
48 * Function tcpip_get treats EINPROGRESS error in the same way as
49 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
50 * Solaris in some cases.
52 * Revision 1.20 1998/05/18 10:10:40 adam
53 * Minor change to avoid C++ warning.
55 * Revision 1.19 1998/02/11 11:53:33 adam
56 * Changed code so that it compiles as C++.
58 * Revision 1.18 1997/09/29 07:15:25 adam
59 * Changed use of setsockopt to avoid warnings on MSVC.
61 * Revision 1.17 1997/09/17 12:10:30 adam
64 * Revision 1.16 1997/09/01 08:49:14 adam
65 * New windows NT/95 port using MSV5.0. Minor changes only.
67 * Revision 1.15 1997/05/14 06:53:33 adam
70 * Revision 1.14 1997/05/01 15:06:32 adam
71 * Moved WINSOCK init. code to tcpip_init routine.
73 * Revision 1.13 1996/11/01 08:45:18 adam
74 * Bug fix: used close on MS-Windows. Fixed to closesocket.
76 * Revision 1.12 1996/07/06 19:58:30 quinn
77 * System headerfiles gathered in yconfig
79 * Revision 1.11 1996/02/23 10:00:39 quinn
82 * Revision 1.10 1996/02/20 12:52:11 quinn
83 * WAIS protocol support.
85 * Revision 1.9 1996/02/10 12:23:11 quinn
86 * Enablie inetd operations fro TCP/IP stack
88 * Revision 1.8 1995/11/01 13:54:27 quinn
91 * Revision 1.7 1995/10/30 12:41:16 quinn
92 * Added hostname lookup for server.
94 * Revision 1.6 1995/09/29 17:12:00 quinn
97 * Revision 1.5 1995/09/29 17:01:48 quinn
100 * Revision 1.4 1995/09/28 10:12:26 quinn
101 * Windows-support changes
103 * Revision 1.3 1995/09/27 15:02:45 quinn
104 * Modified function heads & prototypes.
106 * Revision 1.2 1995/06/15 12:30:06 quinn
107 * Added @ as hostname alias for INADDR ANY.
109 * Revision 1.1 1995/06/14 09:58:20 quinn
110 * Renamed yazlib to comstack.
112 * Revision 1.20 1995/05/16 08:51:16 quinn
113 * License, documentation, and memory fixes
115 * Revision 1.19 1995/04/10 10:24:08 quinn
118 * Revision 1.18 1995/03/30 13:29:27 quinn
119 * Added REUSEADDR in tcpip_bind
121 * Revision 1.17 1995/03/27 08:36:10 quinn
122 * Some work on nonblocking operation in xmosi.c and rfct.c.
123 * Added protocol parameter to cs_create()
125 * Revision 1.16 1995/03/21 15:53:41 quinn
128 * Revision 1.15 1995/03/21 12:31:27 quinn
129 * Added check for EINPROGRESS on connect.
131 * Revision 1.14 1995/03/20 09:47:21 quinn
132 * Added server-side support to xmosi.c
133 * Fixed possible problems in rfct
136 * Revision 1.13 1995/03/15 16:15:13 adam
139 * Revision 1.12 1995/03/15 15:36:27 quinn
140 * Mods to support nonblocking I/O
142 * Revision 1.11 1995/03/15 08:37:57 quinn
143 * Now we're pretty much set for nonblocking I/O.
145 * Revision 1.10 1995/03/14 17:00:07 quinn
146 * Bug-fixes - added tracing info to tcpip.c
148 * Revision 1.9 1995/03/14 10:28:42 quinn
149 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
151 * Revision 1.8 1995/03/10 14:22:50 quinn
152 * Removed debug output.
154 * Revision 1.7 1995/03/10 11:44:59 quinn
155 * Fixes and debugging
157 * Revision 1.6 1995/03/07 10:26:55 quinn
158 * Initialized type field in the comstacks.
160 * Revision 1.5 1995/02/14 20:40:07 quinn
163 * Revision 1.4 1995/02/14 11:54:49 quinn
164 * Beginning to add full CCL.
166 * Revision 1.3 1995/02/10 18:58:10 quinn
167 * Fixed tcpip_get (formerly tcpip_read).
168 * Turned tst (cli) into a proper, event-driven thingy.
170 * Revision 1.2 1995/02/10 15:55:47 quinn
173 * Revision 1.1 1995/02/09 15:51:52 quinn
187 #include <yaz/comstack.h>
188 #include <yaz/tcpip.h>
191 /* Chas added the following, so we get the definition of completeBER */
194 int tcpip_close(COMSTACK h);
195 int tcpip_put(COMSTACK h, char *buf, int size);
196 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
197 int tcpip_connect(COMSTACK h, void *address);
198 int tcpip_more(COMSTACK h);
199 int tcpip_rcvconnect(COMSTACK h);
200 int tcpip_bind(COMSTACK h, void *address, int mode);
201 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
202 int (*check_ip)(void *cd, const char *a, int len, int type),
205 COMSTACK tcpip_accept(COMSTACK h);
206 char *tcpip_addrstr(COMSTACK h);
207 void *tcpip_straddr(COMSTACK h, const char *str);
216 typedef struct tcpip_state
218 char *altbuf; /* alternate buffer for surplus data */
219 int altsize; /* size as xmalloced */
220 int altlen; /* length of data or 0 if none */
222 int written; /* -1 if we aren't writing */
223 int towrite; /* to verify against user input */
224 int (*complete)(const unsigned char *buf, int len); /* length/comple. */
225 struct sockaddr_in addr; /* returned by cs_straddr */
226 char buf[128]; /* returned by cs_addrstr */
230 static int tcpip_init (void)
232 static int initialized = 0;
238 requested = MAKEWORD(1, 1);
239 if (WSAStartup(requested, &wd))
247 static int proto_number = 0;
249 static int tcpip_init (void)
251 struct protoent *proto;
252 /* only call getprotobyname once, in case it allocates memory */
253 if (!(proto = getprotobyname("tcp")))
255 proto_number = proto->p_proto;
260 * This function is always called through the cs_create() macro.
261 * s >= 0: socket has already been established for us.
263 COMSTACK tcpip_type(int s, int blocking, int protocol)
269 unsigned long tru = 1;
277 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
280 if ((s = socket(AF_INET, SOCK_STREAM, proto_number)) < 0)
287 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
289 if (!(state = (struct tcpip_state *)(p->cprivate =
290 xmalloc(sizeof(tcpip_state)))))
294 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
296 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
301 p->type = tcpip_type;
302 p->protocol = (enum oid_proto) protocol;
304 p->f_connect = tcpip_connect;
305 p->f_rcvconnect = tcpip_rcvconnect;
306 p->f_get = tcpip_get;
307 p->f_put = tcpip_put;
308 p->f_close = tcpip_close;
309 p->f_more = tcpip_more;
310 p->f_bind = tcpip_bind;
311 p->f_listen = tcpip_listen;
312 p->f_accept = tcpip_accept;
313 p->f_addrstr = tcpip_addrstr;
314 p->f_straddr = tcpip_straddr;
316 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
322 state->altsize = state->altlen = 0;
323 state->towrite = state->written = -1;
324 if (protocol == PROTO_WAIS)
325 state->complete = completeWAIS;
327 state->complete = completeBER;
329 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
330 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
335 int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
339 short int port = 210;
344 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
345 add->sin_family = AF_INET;
346 strncpy(buf, str, 511);
348 if ((p = strchr(buf, '/')))
350 if ((p = strchr(buf, ':')))
355 add->sin_port = htons(port);
356 if (!strcmp("@", buf))
357 add->sin_addr.s_addr = INADDR_ANY;
358 else if ((hp = gethostbyname(buf)))
359 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
360 sizeof(struct in_addr));
361 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
362 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
368 void *tcpip_straddr(COMSTACK h, const char *str)
370 tcpip_state *sp = (tcpip_state *)h->cprivate;
372 if (!tcpip_strtoaddr_ex (str, &sp->addr))
377 struct sockaddr_in *tcpip_strtoaddr(const char *str)
379 static struct sockaddr_in add;
381 if (!tcpip_strtoaddr_ex (str, &add))
386 int tcpip_more(COMSTACK h)
388 tcpip_state *sp = (tcpip_state *)h->cprivate;
390 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
395 * connect(2) will block (sometimes) - nothing we can do short of doing
396 * weird things like spawning subprocesses or threading or some weird junk
399 int tcpip_connect(COMSTACK h, void *address)
401 struct sockaddr_in *add = (struct sockaddr_in *)address;
403 TRC(fprintf(stderr, "tcpip_connect\n"));
404 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
407 if (WSAGetLastError() == WSAEWOULDBLOCK)
409 if (errno == EINPROGRESS)
414 h->state = CS_DATAXFER;
421 int tcpip_rcvconnect(COMSTACK h)
423 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
427 int tcpip_bind(COMSTACK h, void *address, int mode)
429 struct sockaddr *addr = (struct sockaddr *)address;
433 unsigned long one = 1;
436 TRC(fprintf(stderr, "tcpip_bind\n"));
437 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
438 &one, sizeof(one)) < 0)
443 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
448 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
457 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
458 int (*check_ip)(void *cd, const char *a, int len, int t),
461 struct sockaddr_in addr;
462 int len = sizeof(addr);
464 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
465 if (h->state != CS_IDLE)
467 h->cerrno = CSOUTSTATE;
470 h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len);
475 WSAGetLastError() == WSAEWOULDBLOCK
480 h->cerrno = CSNODATA;
485 if (addrlen && (size_t) (*addrlen) >= sizeof(struct sockaddr_in))
486 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
489 if (check_ip && (*check_ip)(cd, (const char *) &addr,
490 sizeof(addr), AF_INET))
494 closesocket(h->newfd);
505 COMSTACK tcpip_accept(COMSTACK h)
508 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
510 unsigned long tru = 1;
513 TRC(fprintf(stderr, "tcpip_accept\n"));
514 if (h->state != CS_INCON)
516 h->cerrno = CSOUTSTATE;
519 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
523 closesocket(h->newfd);
530 memcpy(cnew, h, sizeof(*h));
531 cnew->iofile = h->newfd;
532 if (!(state = (tcpip_state *)
533 (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
539 closesocket(h->newfd);
548 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
550 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
557 closesocket(h->newfd);
569 state->altsize = state->altlen = 0;
570 state->towrite = state->written = -1;
571 state->complete = st->complete;
572 cnew->state = CS_DATAXFER;
577 #define CS_TCPIP_BUFCHUNK 4096
580 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
581 * 0=connection closed.
583 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
585 tcpip_state *sp = (tcpip_state *)h->cprivate;
587 int tmpi, berlen, rest, req, tomove;
588 int hasread = 0, res;
590 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
591 if (sp->altlen) /* switch buffers */
593 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
594 (unsigned) sp->altbuf));
598 *bufsize = sp->altsize;
599 hasread = sp->altlen;
604 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
608 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
611 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
612 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
614 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
617 if (WSAGetLastError() == WSAEWOULDBLOCK)
622 if (errno == EWOULDBLOCK
624 || errno == EINPROGRESS
637 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
639 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
641 /* move surplus buffer (or everything if we didn't get a BER rec.) */
642 if (hasread > berlen)
644 tomove = req = hasread - berlen;
645 rest = tomove % CS_TCPIP_BUFCHUNK;
647 req += CS_TCPIP_BUFCHUNK - rest;
650 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
652 } else if (sp->altsize < req)
653 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
655 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
656 (unsigned) sp->altbuf));
657 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
659 if (berlen < CS_TCPIP_BUFCHUNK - 1)
660 *(*buf + berlen) = '\0';
661 return berlen ? berlen : 1;
666 * In nonblocking mode, you must call again with same buffer while
669 int tcpip_put(COMSTACK h, char *buf, int size)
672 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
674 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
675 if (state->towrite < 0)
677 state->towrite = size;
680 else if (state->towrite != size)
682 h->cerrno = CSWRONGBUF;
685 while (state->towrite > state->written)
687 if ((res = send(h->iofile, buf + state->written, size -
688 state->written, 0)) < 0)
691 if (WSAGetLastError() == WSAEWOULDBLOCK)
696 TRC(fprintf(stderr, " Flow control stop\n"));
702 state->written += res;
703 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
704 res, state->written, size));
706 state->towrite = state->written = -1;
707 TRC(fprintf(stderr, " Ok\n"));
711 int tcpip_close(COMSTACK h)
713 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
715 TRC(fprintf(stderr, "tcpip_close\n"));
718 closesocket(h->iofile);
729 char *tcpip_addrstr(COMSTACK h)
731 struct sockaddr_in addr;
732 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
733 char *r, *buf = sp->buf;
735 struct hostent *host;
738 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
743 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
745 r = (char*) host->h_name;
747 r = inet_ntoa(addr.sin_addr);
748 sprintf(buf, "tcp:%s", r);