2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.32 1999-11-30 13:47:11 adam
8 * Improved installation. Moved header files to include/yaz.
10 * Revision 1.31 1999/04/29 07:31:23 adam
11 * Changed tcpip_strtoaddr_ex so that only part 'till '/' is considered
14 * Revision 1.30 1999/04/20 09:56:48 adam
15 * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
16 * Modified all encoders/decoders to reflect this change.
18 * Revision 1.29 1999/04/16 14:45:55 adam
19 * Added interface for tcpd wrapper for access control.
21 * Revision 1.28 1999/03/31 11:11:14 adam
22 * Function getprotobyname only called once. Minor change in tcpip_get
23 * to handle multi-threaded conditions.
25 * Revision 1.27 1999/02/02 13:57:31 adam
26 * Uses preprocessor define WIN32 instead of WINDOWS to build code
27 * for Microsoft WIN32.
29 * Revision 1.26 1999/01/08 11:23:14 adam
30 * Added const modifier to some of the BER/ODR encoding routines.
32 * Revision 1.25 1998/07/07 15:49:23 adam
33 * Added braces to avoid warning.
35 * Revision 1.24 1998/06/29 07:59:17 adam
38 * Revision 1.23 1998/06/23 15:37:50 adam
39 * Added type cast to prevent warning.
41 * Revision 1.22 1998/06/22 11:32:36 adam
42 * Added 'conditional cs_listen' feature.
44 * Revision 1.21 1998/05/20 09:55:32 adam
45 * Function tcpip_get treats EINPROGRESS error in the same way as
46 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
47 * Solaris in some cases.
49 * Revision 1.20 1998/05/18 10:10:40 adam
50 * Minor change to avoid C++ warning.
52 * Revision 1.19 1998/02/11 11:53:33 adam
53 * Changed code so that it compiles as C++.
55 * Revision 1.18 1997/09/29 07:15:25 adam
56 * Changed use of setsockopt to avoid warnings on MSVC.
58 * Revision 1.17 1997/09/17 12:10:30 adam
61 * Revision 1.16 1997/09/01 08:49:14 adam
62 * New windows NT/95 port using MSV5.0. Minor changes only.
64 * Revision 1.15 1997/05/14 06:53:33 adam
67 * Revision 1.14 1997/05/01 15:06:32 adam
68 * Moved WINSOCK init. code to tcpip_init routine.
70 * Revision 1.13 1996/11/01 08:45:18 adam
71 * Bug fix: used close on MS-Windows. Fixed to closesocket.
73 * Revision 1.12 1996/07/06 19:58:30 quinn
74 * System headerfiles gathered in yconfig
76 * Revision 1.11 1996/02/23 10:00:39 quinn
79 * Revision 1.10 1996/02/20 12:52:11 quinn
80 * WAIS protocol support.
82 * Revision 1.9 1996/02/10 12:23:11 quinn
83 * Enablie inetd operations fro TCP/IP stack
85 * Revision 1.8 1995/11/01 13:54:27 quinn
88 * Revision 1.7 1995/10/30 12:41:16 quinn
89 * Added hostname lookup for server.
91 * Revision 1.6 1995/09/29 17:12:00 quinn
94 * Revision 1.5 1995/09/29 17:01:48 quinn
97 * Revision 1.4 1995/09/28 10:12:26 quinn
98 * Windows-support changes
100 * Revision 1.3 1995/09/27 15:02:45 quinn
101 * Modified function heads & prototypes.
103 * Revision 1.2 1995/06/15 12:30:06 quinn
104 * Added @ as hostname alias for INADDR ANY.
106 * Revision 1.1 1995/06/14 09:58:20 quinn
107 * Renamed yazlib to comstack.
109 * Revision 1.20 1995/05/16 08:51:16 quinn
110 * License, documentation, and memory fixes
112 * Revision 1.19 1995/04/10 10:24:08 quinn
115 * Revision 1.18 1995/03/30 13:29:27 quinn
116 * Added REUSEADDR in tcpip_bind
118 * Revision 1.17 1995/03/27 08:36:10 quinn
119 * Some work on nonblocking operation in xmosi.c and rfct.c.
120 * Added protocol parameter to cs_create()
122 * Revision 1.16 1995/03/21 15:53:41 quinn
125 * Revision 1.15 1995/03/21 12:31:27 quinn
126 * Added check for EINPROGRESS on connect.
128 * Revision 1.14 1995/03/20 09:47:21 quinn
129 * Added server-side support to xmosi.c
130 * Fixed possible problems in rfct
133 * Revision 1.13 1995/03/15 16:15:13 adam
136 * Revision 1.12 1995/03/15 15:36:27 quinn
137 * Mods to support nonblocking I/O
139 * Revision 1.11 1995/03/15 08:37:57 quinn
140 * Now we're pretty much set for nonblocking I/O.
142 * Revision 1.10 1995/03/14 17:00:07 quinn
143 * Bug-fixes - added tracing info to tcpip.c
145 * Revision 1.9 1995/03/14 10:28:42 quinn
146 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
148 * Revision 1.8 1995/03/10 14:22:50 quinn
149 * Removed debug output.
151 * Revision 1.7 1995/03/10 11:44:59 quinn
152 * Fixes and debugging
154 * Revision 1.6 1995/03/07 10:26:55 quinn
155 * Initialized type field in the comstacks.
157 * Revision 1.5 1995/02/14 20:40:07 quinn
160 * Revision 1.4 1995/02/14 11:54:49 quinn
161 * Beginning to add full CCL.
163 * Revision 1.3 1995/02/10 18:58:10 quinn
164 * Fixed tcpip_get (formerly tcpip_read).
165 * Turned tst (cli) into a proper, event-driven thingy.
167 * Revision 1.2 1995/02/10 15:55:47 quinn
170 * Revision 1.1 1995/02/09 15:51:52 quinn
184 #include <yaz/comstack.h>
185 #include <yaz/tcpip.h>
188 /* Chas added the following, so we get the definition of completeBER */
191 int tcpip_close(COMSTACK h);
192 int tcpip_put(COMSTACK h, char *buf, int size);
193 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
194 int tcpip_connect(COMSTACK h, void *address);
195 int tcpip_more(COMSTACK h);
196 int tcpip_rcvconnect(COMSTACK h);
197 int tcpip_bind(COMSTACK h, void *address, int mode);
198 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
199 int (*check_ip)(void *cd, const char *a, int len, int type),
202 COMSTACK tcpip_accept(COMSTACK h);
203 char *tcpip_addrstr(COMSTACK h);
204 void *tcpip_straddr(COMSTACK h, const char *str);
213 typedef struct tcpip_state
215 char *altbuf; /* alternate buffer for surplus data */
216 int altsize; /* size as xmalloced */
217 int altlen; /* length of data or 0 if none */
219 int written; /* -1 if we aren't writing */
220 int towrite; /* to verify against user input */
221 int (*complete)(const unsigned char *buf, int len); /* length/comple. */
222 struct sockaddr_in addr; /* returned by cs_straddr */
223 char buf[128]; /* returned by cs_addrstr */
227 static int tcpip_init (void)
229 static int initialized = 0;
235 requested = MAKEWORD(1, 1);
236 if (WSAStartup(requested, &wd))
244 static int proto_number = 0;
246 static int tcpip_init (void)
248 struct protoent *proto;
249 /* only call getprotobyname once, in case it allocates memory */
250 if (!(proto = getprotobyname("tcp")))
252 proto_number = proto->p_proto;
257 * This function is always called through the cs_create() macro.
258 * s >= 0: socket has already been established for us.
260 COMSTACK tcpip_type(int s, int blocking, int protocol)
266 unsigned long tru = 1;
274 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
277 if ((s = socket(AF_INET, SOCK_STREAM, proto_number)) < 0)
284 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
286 if (!(state = (struct tcpip_state *)(p->cprivate =
287 xmalloc(sizeof(tcpip_state)))))
291 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
293 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
298 p->type = tcpip_type;
299 p->protocol = (enum oid_proto) protocol;
301 p->f_connect = tcpip_connect;
302 p->f_rcvconnect = tcpip_rcvconnect;
303 p->f_get = tcpip_get;
304 p->f_put = tcpip_put;
305 p->f_close = tcpip_close;
306 p->f_more = tcpip_more;
307 p->f_bind = tcpip_bind;
308 p->f_listen = tcpip_listen;
309 p->f_accept = tcpip_accept;
310 p->f_addrstr = tcpip_addrstr;
311 p->f_straddr = tcpip_straddr;
313 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
319 state->altsize = state->altlen = 0;
320 state->towrite = state->written = -1;
321 if (protocol == PROTO_WAIS)
322 state->complete = completeWAIS;
324 state->complete = completeBER;
326 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
327 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
332 int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
336 short int port = 210;
341 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
342 add->sin_family = AF_INET;
343 strncpy(buf, str, 511);
345 if ((p = strchr(buf, '/')))
347 if ((p = strchr(buf, ':')))
352 add->sin_port = htons(port);
353 if (!strcmp("@", buf))
354 add->sin_addr.s_addr = INADDR_ANY;
355 else if ((hp = gethostbyname(buf)))
356 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
357 sizeof(struct in_addr));
358 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
359 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
365 void *tcpip_straddr(COMSTACK h, const char *str)
367 tcpip_state *sp = (tcpip_state *)h->cprivate;
369 if (!tcpip_strtoaddr_ex (str, &sp->addr))
374 struct sockaddr_in *tcpip_strtoaddr(const char *str)
376 static struct sockaddr_in add;
378 if (!tcpip_strtoaddr_ex (str, &add))
383 int tcpip_more(COMSTACK h)
385 tcpip_state *sp = (tcpip_state *)h->cprivate;
387 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
392 * connect(2) will block (sometimes) - nothing we can do short of doing
393 * weird things like spawning subprocesses or threading or some weird junk
396 int tcpip_connect(COMSTACK h, void *address)
398 struct sockaddr_in *add = (struct sockaddr_in *)address;
400 TRC(fprintf(stderr, "tcpip_connect\n"));
401 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
404 if (WSAGetLastError() == WSAEWOULDBLOCK)
406 if (errno == EINPROGRESS)
411 h->state = CS_DATAXFER;
418 int tcpip_rcvconnect(COMSTACK h)
420 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
424 int tcpip_bind(COMSTACK h, void *address, int mode)
426 struct sockaddr *addr = (struct sockaddr *)address;
430 unsigned long one = 1;
433 TRC(fprintf(stderr, "tcpip_bind\n"));
434 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
435 &one, sizeof(one)) < 0)
440 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
445 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
454 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
455 int (*check_ip)(void *cd, const char *a, int len, int t),
458 struct sockaddr_in addr;
459 int len = sizeof(addr);
461 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
462 if (h->state != CS_IDLE)
464 h->cerrno = CSOUTSTATE;
467 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
470 if (WSAGetLastError() == WSAEWOULDBLOCK)
472 if (errno == EWOULDBLOCK)
475 h->cerrno = CSNODATA;
480 if (addrlen && (size_t) (*addrlen) >= sizeof(struct sockaddr_in))
481 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
484 if (check_ip && (*check_ip)(cd, (const char *) &addr,
485 sizeof(addr), AF_INET))
489 closesocket(h->newfd);
499 COMSTACK tcpip_accept(COMSTACK h)
502 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
504 unsigned long tru = 1;
507 TRC(fprintf(stderr, "tcpip_accept\n"));
508 if (h->state != CS_INCON)
510 h->cerrno = CSOUTSTATE;
513 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
518 memcpy(cnew, h, sizeof(*h));
519 cnew->iofile = h->newfd;
520 if (!(state = (tcpip_state *)
521 (cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
527 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
529 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
533 state->altsize = state->altlen = 0;
534 state->towrite = state->written = -1;
535 state->complete = st->complete;
536 cnew->state = CS_DATAXFER;
541 #define CS_TCPIP_BUFCHUNK 4096
544 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
545 * 0=connection closed.
547 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
549 tcpip_state *sp = (tcpip_state *)h->cprivate;
551 int tmpi, berlen, rest, req, tomove;
552 int hasread = 0, res;
554 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
555 if (sp->altlen) /* switch buffers */
557 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
558 (unsigned) sp->altbuf));
562 *bufsize = sp->altsize;
563 hasread = sp->altlen;
568 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
572 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
575 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
576 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
578 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
581 if (WSAGetLastError() == WSAEWOULDBLOCK)
586 if (errno == EWOULDBLOCK
588 || errno == EINPROGRESS
601 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
603 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
605 /* move surplus buffer (or everything if we didn't get a BER rec.) */
606 if (hasread > berlen)
608 tomove = req = hasread - berlen;
609 rest = tomove % CS_TCPIP_BUFCHUNK;
611 req += CS_TCPIP_BUFCHUNK - rest;
614 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
616 } else if (sp->altsize < req)
617 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
619 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
620 (unsigned) sp->altbuf));
621 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
623 if (berlen < CS_TCPIP_BUFCHUNK - 1)
624 *(*buf + berlen) = '\0';
625 return berlen ? berlen : 1;
630 * In nonblocking mode, you must call again with same buffer while
633 int tcpip_put(COMSTACK h, char *buf, int size)
636 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
638 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
639 if (state->towrite < 0)
641 state->towrite = size;
644 else if (state->towrite != size)
646 h->cerrno = CSWRONGBUF;
649 while (state->towrite > state->written)
651 if ((res = send(h->iofile, buf + state->written, size -
652 state->written, 0)) < 0)
655 if (WSAGetLastError() == WSAEWOULDBLOCK)
660 TRC(fprintf(stderr, " Flow control stop\n"));
666 state->written += res;
667 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
668 res, state->written, size));
670 state->towrite = state->written = -1;
671 TRC(fprintf(stderr, " Ok\n"));
675 int tcpip_close(COMSTACK h)
677 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
679 TRC(fprintf(stderr, "tcpip_close\n"));
682 closesocket(h->iofile);
693 char *tcpip_addrstr(COMSTACK h)
695 struct sockaddr_in addr;
696 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
697 char *r, *buf = sp->buf;
699 struct hostent *host;
702 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
707 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
709 r = (char*) host->h_name;
711 r = inet_ntoa(addr.sin_addr);
712 sprintf(buf, "tcp:%s", r);