2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.26 1999-01-08 11:23:14 adam
8 * Added const modifier to some of the BER/ODR encoding routines.
10 * Revision 1.25 1998/07/07 15:49:23 adam
11 * Added braces to avoid warning.
13 * Revision 1.24 1998/06/29 07:59:17 adam
16 * Revision 1.23 1998/06/23 15:37:50 adam
17 * Added type cast to prevent warning.
19 * Revision 1.22 1998/06/22 11:32:36 adam
20 * Added 'conditional cs_listen' feature.
22 * Revision 1.21 1998/05/20 09:55:32 adam
23 * Function tcpip_get treats EINPROGRESS error in the same way as
24 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
25 * Solaris in some cases.
27 * Revision 1.20 1998/05/18 10:10:40 adam
28 * Minor change to avoid C++ warning.
30 * Revision 1.19 1998/02/11 11:53:33 adam
31 * Changed code so that it compiles as C++.
33 * Revision 1.18 1997/09/29 07:15:25 adam
34 * Changed use of setsockopt to avoid warnings on MSVC.
36 * Revision 1.17 1997/09/17 12:10:30 adam
39 * Revision 1.16 1997/09/01 08:49:14 adam
40 * New windows NT/95 port using MSV5.0. Minor changes only.
42 * Revision 1.15 1997/05/14 06:53:33 adam
45 * Revision 1.14 1997/05/01 15:06:32 adam
46 * Moved WINSOCK init. code to tcpip_init routine.
48 * Revision 1.13 1996/11/01 08:45:18 adam
49 * Bug fix: used close on MS-Windows. Fixed to closesocket.
51 * Revision 1.12 1996/07/06 19:58:30 quinn
52 * System headerfiles gathered in yconfig
54 * Revision 1.11 1996/02/23 10:00:39 quinn
57 * Revision 1.10 1996/02/20 12:52:11 quinn
58 * WAIS protocol support.
60 * Revision 1.9 1996/02/10 12:23:11 quinn
61 * Enablie inetd operations fro TCP/IP stack
63 * Revision 1.8 1995/11/01 13:54:27 quinn
66 * Revision 1.7 1995/10/30 12:41:16 quinn
67 * Added hostname lookup for server.
69 * Revision 1.6 1995/09/29 17:12:00 quinn
72 * Revision 1.5 1995/09/29 17:01:48 quinn
75 * Revision 1.4 1995/09/28 10:12:26 quinn
76 * Windows-support changes
78 * Revision 1.3 1995/09/27 15:02:45 quinn
79 * Modified function heads & prototypes.
81 * Revision 1.2 1995/06/15 12:30:06 quinn
82 * Added @ as hostname alias for INADDR ANY.
84 * Revision 1.1 1995/06/14 09:58:20 quinn
85 * Renamed yazlib to comstack.
87 * Revision 1.20 1995/05/16 08:51:16 quinn
88 * License, documentation, and memory fixes
90 * Revision 1.19 1995/04/10 10:24:08 quinn
93 * Revision 1.18 1995/03/30 13:29:27 quinn
94 * Added REUSEADDR in tcpip_bind
96 * Revision 1.17 1995/03/27 08:36:10 quinn
97 * Some work on nonblocking operation in xmosi.c and rfct.c.
98 * Added protocol parameter to cs_create()
100 * Revision 1.16 1995/03/21 15:53:41 quinn
103 * Revision 1.15 1995/03/21 12:31:27 quinn
104 * Added check for EINPROGRESS on connect.
106 * Revision 1.14 1995/03/20 09:47:21 quinn
107 * Added server-side support to xmosi.c
108 * Fixed possible problems in rfct
111 * Revision 1.13 1995/03/15 16:15:13 adam
114 * Revision 1.12 1995/03/15 15:36:27 quinn
115 * Mods to support nonblocking I/O
117 * Revision 1.11 1995/03/15 08:37:57 quinn
118 * Now we're pretty much set for nonblocking I/O.
120 * Revision 1.10 1995/03/14 17:00:07 quinn
121 * Bug-fixes - added tracing info to tcpip.c
123 * Revision 1.9 1995/03/14 10:28:42 quinn
124 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
126 * Revision 1.8 1995/03/10 14:22:50 quinn
127 * Removed debug output.
129 * Revision 1.7 1995/03/10 11:44:59 quinn
130 * Fixes and debugging
132 * Revision 1.6 1995/03/07 10:26:55 quinn
133 * Initialized type field in the comstacks.
135 * Revision 1.5 1995/02/14 20:40:07 quinn
138 * Revision 1.4 1995/02/14 11:54:49 quinn
139 * Beginning to add full CCL.
141 * Revision 1.3 1995/02/10 18:58:10 quinn
142 * Fixed tcpip_get (formerly tcpip_read).
143 * Turned tst (cli) into a proper, event-driven thingy.
145 * Revision 1.2 1995/02/10 15:55:47 quinn
148 * Revision 1.1 1995/02/09 15:51:52 quinn
162 #include <comstack.h>
165 /* Chas added the following, so we get the definition of completeBER */
168 int tcpip_close(COMSTACK h);
169 int tcpip_put(COMSTACK h, char *buf, int size);
170 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
171 int tcpip_connect(COMSTACK h, void *address);
172 int tcpip_more(COMSTACK h);
173 int tcpip_rcvconnect(COMSTACK h);
174 int tcpip_bind(COMSTACK h, void *address, int mode);
175 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
176 int (*check_ip)(void *cd, const char *a, int len, int type),
179 COMSTACK tcpip_accept(COMSTACK h);
180 char *tcpip_addrstr(COMSTACK h);
181 void *tcpip_straddr(COMSTACK h, const char *str);
190 typedef struct tcpip_state
192 char *altbuf; /* alternate buffer for surplus data */
193 int altsize; /* size as xmalloced */
194 int altlen; /* length of data or 0 if none */
196 int written; /* -1 if we aren't writing */
197 int towrite; /* to verify against user input */
198 int (*complete)(const unsigned char *buf, int len); /* length/comple. */
199 struct sockaddr_in addr; /* returned by cs_straddr */
200 char buf[128]; /* returned by cs_addrstr */
204 static int tcpip_init (void)
206 static int initialized = 0;
212 requested = MAKEWORD(1, 1);
213 if (WSAStartup(requested, &wd))
220 static int tcpip_init (void)
226 * This function is always called through the cs_create() macro.
227 * s >= 0: socket has already been established for us.
229 COMSTACK tcpip_type(int s, int blocking, int protocol)
235 unsigned long tru = 1;
237 struct protoent *proto;
245 if (!(proto = getprotobyname("tcp")))
247 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
249 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
256 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
258 if (!(state = (struct tcpip_state *)(p->cprivate =
259 xmalloc(sizeof(tcpip_state)))))
263 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
265 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
270 p->type = tcpip_type;
271 p->protocol = (enum oid_proto) protocol;
273 p->f_connect = tcpip_connect;
274 p->f_rcvconnect = tcpip_rcvconnect;
275 p->f_get = tcpip_get;
276 p->f_put = tcpip_put;
277 p->f_close = tcpip_close;
278 p->f_more = tcpip_more;
279 p->f_bind = tcpip_bind;
280 p->f_listen = tcpip_listen;
281 p->f_accept = tcpip_accept;
282 p->f_addrstr = tcpip_addrstr;
283 p->f_straddr = tcpip_straddr;
285 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
291 state->altsize = state->altlen = 0;
292 state->towrite = state->written = -1;
293 if (protocol == PROTO_WAIS)
294 state->complete = completeWAIS;
296 state->complete = completeBER;
298 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
299 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
304 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
308 short int port = 210;
313 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
314 add->sin_family = AF_INET;
316 if ((p = strchr(buf, ':')))
321 add->sin_port = htons(port);
322 if (!strcmp("@", buf))
323 add->sin_addr.s_addr = INADDR_ANY;
324 else if ((hp = gethostbyname(buf)))
325 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
326 sizeof(struct in_addr));
327 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
328 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
334 void *tcpip_straddr(COMSTACK h, const char *str)
336 tcpip_state *sp = (tcpip_state *)h->cprivate;
338 if (!tcpip_strtoaddr_ex (str, &sp->addr))
343 struct sockaddr_in *tcpip_strtoaddr(const char *str)
345 static struct sockaddr_in add;
347 if (!tcpip_strtoaddr_ex (str, &add))
352 int tcpip_more(COMSTACK h)
354 tcpip_state *sp = (tcpip_state *)h->cprivate;
356 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
361 * connect(2) will block (sometimes) - nothing we can do short of doing
362 * weird things like spawning subprocesses or threading or some weird junk
365 int tcpip_connect(COMSTACK h, void *address)
367 struct sockaddr_in *add = (struct sockaddr_in *)address;
369 TRC(fprintf(stderr, "tcpip_connect\n"));
370 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
373 if (WSAGetLastError() == WSAEWOULDBLOCK)
375 if (errno == EINPROGRESS)
380 h->state = CS_DATAXFER;
387 int tcpip_rcvconnect(COMSTACK h)
389 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
393 int tcpip_bind(COMSTACK h, void *address, int mode)
395 struct sockaddr *addr = (struct sockaddr *)address;
399 unsigned long one = 1;
402 TRC(fprintf(stderr, "tcpip_bind\n"));
403 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
404 &one, sizeof(one)) < 0)
409 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
414 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
424 void tcpip_get_ip(COMSTACK h, char *ip_buf)
426 struct tcpip_state *sp = (tcpip_state *)h->cprivate;
427 const char *ip_addr = (const char *) (&sp->addr->sin_addr.s_addr);
430 for (i = 0; i<4; i++)
431 TRC (fprintf (stderr, "%u ", ip_addr[i]));
432 TRC (fprintf (stderr, "\n"));
436 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
437 int (*check_ip)(void *cd, const char *a, int len, int type),
440 struct sockaddr_in addr;
441 int len = sizeof(addr);
443 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
444 if (h->state != CS_IDLE)
446 h->cerrno = CSOUTSTATE;
449 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
452 if (WSAGetLastError() == WSAEWOULDBLOCK)
454 if (errno == EWOULDBLOCK)
457 h->cerrno = CSNODATA;
462 if (addrlen && *addrlen >= sizeof(struct sockaddr_in))
463 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
466 if (check_ip && (*check_ip)(cd, (const char *) &addr.sin_addr,
467 sizeof(addr.sin_addr), AF_INET))
471 closesocket(h->iofile);
481 COMSTACK tcpip_accept(COMSTACK h)
484 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
486 unsigned long tru = 1;
489 TRC(fprintf(stderr, "tcpip_accept\n"));
490 if (h->state != CS_INCON)
492 h->cerrno = CSOUTSTATE;
495 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
500 memcpy(cnew, h, sizeof(*h));
501 cnew->iofile = h->newfd;
502 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
508 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
510 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
514 state->altsize = state->altlen = 0;
515 state->towrite = state->written = -1;
516 state->complete = st->complete;
517 cnew->state = CS_DATAXFER;
522 #define CS_TCPIP_BUFCHUNK 4096
525 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
526 * 0=connection closed.
528 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
530 tcpip_state *sp = (tcpip_state *)h->cprivate;
532 int tmpi, berlen, rest, req, tomove;
533 int hasread = 0, res;
535 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
536 if (sp->altlen) /* switch buffers */
538 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
539 (unsigned) sp->altbuf));
543 *bufsize = sp->altsize;
544 hasread = sp->altlen;
549 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
553 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
556 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
557 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
559 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
562 if (WSAGetLastError() == WSAEWOULDBLOCK)
565 if (errno == EINPROGRESS || errno == EWOULDBLOCK)
567 if (errno == EWOULDBLOCK)
577 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
579 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
581 /* move surplus buffer (or everything if we didn't get a BER rec.) */
582 if (hasread > berlen)
584 tomove = req = hasread - berlen;
585 rest = tomove % CS_TCPIP_BUFCHUNK;
587 req += CS_TCPIP_BUFCHUNK - rest;
590 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
592 } else if (sp->altsize < req)
593 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
595 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
596 (unsigned) sp->altbuf));
597 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
599 if (berlen < CS_TCPIP_BUFCHUNK - 1)
600 *(*buf + berlen) = '\0';
601 return berlen ? berlen : 1;
606 * In nonblocking mode, you must call again with same buffer while
609 int tcpip_put(COMSTACK h, char *buf, int size)
612 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
614 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
615 if (state->towrite < 0)
617 state->towrite = size;
620 else if (state->towrite != size)
622 h->cerrno = CSWRONGBUF;
625 while (state->towrite > state->written)
627 if ((res = send(h->iofile, buf + state->written, size -
628 state->written, 0)) < 0)
631 if (WSAGetLastError() == WSAEWOULDBLOCK)
636 TRC(fprintf(stderr, " Flow control stop\n"));
642 state->written += res;
643 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
644 res, state->written, size));
646 state->towrite = state->written = -1;
647 TRC(fprintf(stderr, " Ok\n"));
651 int tcpip_close(COMSTACK h)
653 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
655 TRC(fprintf(stderr, "tcpip_close\n"));
658 closesocket(h->iofile);
669 char *tcpip_addrstr(COMSTACK h)
671 struct sockaddr_in addr;
672 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
673 char *r, *buf = sp->buf;
675 struct hostent *host;
678 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
683 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
685 r = (char*) host->h_name;
687 r = inet_ntoa(addr.sin_addr);
688 sprintf(buf, "tcp:%s", r);