2 * Copyright (c) 1995-1998, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.25 1998-07-07 15:49:23 adam
8 * Added braces to avoid warning.
10 * Revision 1.24 1998/06/29 07:59:17 adam
13 * Revision 1.23 1998/06/23 15:37:50 adam
14 * Added type cast to prevent warning.
16 * Revision 1.22 1998/06/22 11:32:36 adam
17 * Added 'conditional cs_listen' feature.
19 * Revision 1.21 1998/05/20 09:55:32 adam
20 * Function tcpip_get treats EINPROGRESS error in the same way as
21 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
22 * Solaris in some cases.
24 * Revision 1.20 1998/05/18 10:10:40 adam
25 * Minor change to avoid C++ warning.
27 * Revision 1.19 1998/02/11 11:53:33 adam
28 * Changed code so that it compiles as C++.
30 * Revision 1.18 1997/09/29 07:15:25 adam
31 * Changed use of setsockopt to avoid warnings on MSVC.
33 * Revision 1.17 1997/09/17 12:10:30 adam
36 * Revision 1.16 1997/09/01 08:49:14 adam
37 * New windows NT/95 port using MSV5.0. Minor changes only.
39 * Revision 1.15 1997/05/14 06:53:33 adam
42 * Revision 1.14 1997/05/01 15:06:32 adam
43 * Moved WINSOCK init. code to tcpip_init routine.
45 * Revision 1.13 1996/11/01 08:45:18 adam
46 * Bug fix: used close on MS-Windows. Fixed to closesocket.
48 * Revision 1.12 1996/07/06 19:58:30 quinn
49 * System headerfiles gathered in yconfig
51 * Revision 1.11 1996/02/23 10:00:39 quinn
54 * Revision 1.10 1996/02/20 12:52:11 quinn
55 * WAIS protocol support.
57 * Revision 1.9 1996/02/10 12:23:11 quinn
58 * Enablie inetd operations fro TCP/IP stack
60 * Revision 1.8 1995/11/01 13:54:27 quinn
63 * Revision 1.7 1995/10/30 12:41:16 quinn
64 * Added hostname lookup for server.
66 * Revision 1.6 1995/09/29 17:12:00 quinn
69 * Revision 1.5 1995/09/29 17:01:48 quinn
72 * Revision 1.4 1995/09/28 10:12:26 quinn
73 * Windows-support changes
75 * Revision 1.3 1995/09/27 15:02:45 quinn
76 * Modified function heads & prototypes.
78 * Revision 1.2 1995/06/15 12:30:06 quinn
79 * Added @ as hostname alias for INADDR ANY.
81 * Revision 1.1 1995/06/14 09:58:20 quinn
82 * Renamed yazlib to comstack.
84 * Revision 1.20 1995/05/16 08:51:16 quinn
85 * License, documentation, and memory fixes
87 * Revision 1.19 1995/04/10 10:24:08 quinn
90 * Revision 1.18 1995/03/30 13:29:27 quinn
91 * Added REUSEADDR in tcpip_bind
93 * Revision 1.17 1995/03/27 08:36:10 quinn
94 * Some work on nonblocking operation in xmosi.c and rfct.c.
95 * Added protocol parameter to cs_create()
97 * Revision 1.16 1995/03/21 15:53:41 quinn
100 * Revision 1.15 1995/03/21 12:31:27 quinn
101 * Added check for EINPROGRESS on connect.
103 * Revision 1.14 1995/03/20 09:47:21 quinn
104 * Added server-side support to xmosi.c
105 * Fixed possible problems in rfct
108 * Revision 1.13 1995/03/15 16:15:13 adam
111 * Revision 1.12 1995/03/15 15:36:27 quinn
112 * Mods to support nonblocking I/O
114 * Revision 1.11 1995/03/15 08:37:57 quinn
115 * Now we're pretty much set for nonblocking I/O.
117 * Revision 1.10 1995/03/14 17:00:07 quinn
118 * Bug-fixes - added tracing info to tcpip.c
120 * Revision 1.9 1995/03/14 10:28:42 quinn
121 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
123 * Revision 1.8 1995/03/10 14:22:50 quinn
124 * Removed debug output.
126 * Revision 1.7 1995/03/10 11:44:59 quinn
127 * Fixes and debugging
129 * Revision 1.6 1995/03/07 10:26:55 quinn
130 * Initialized type field in the comstacks.
132 * Revision 1.5 1995/02/14 20:40:07 quinn
135 * Revision 1.4 1995/02/14 11:54:49 quinn
136 * Beginning to add full CCL.
138 * Revision 1.3 1995/02/10 18:58:10 quinn
139 * Fixed tcpip_get (formerly tcpip_read).
140 * Turned tst (cli) into a proper, event-driven thingy.
142 * Revision 1.2 1995/02/10 15:55:47 quinn
145 * Revision 1.1 1995/02/09 15:51:52 quinn
159 #include <comstack.h>
162 /* Chas added the following 2, so we get the definition of completeBER */
166 int tcpip_close(COMSTACK h);
167 int tcpip_put(COMSTACK h, char *buf, int size);
168 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
169 int tcpip_connect(COMSTACK h, void *address);
170 int tcpip_more(COMSTACK h);
171 int tcpip_rcvconnect(COMSTACK h);
172 int tcpip_bind(COMSTACK h, void *address, int mode);
173 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
174 int (*check_ip)(void *cd, const char *a, int len, int type),
177 COMSTACK tcpip_accept(COMSTACK h);
178 char *tcpip_addrstr(COMSTACK h);
179 void *tcpip_straddr(COMSTACK h, const char *str);
182 * Determine length/completeness of incoming packages
184 /* Chas: Removed the definition of completeBERfrom here, use the one in the */
185 /* include directory as that as the extern "C" around it */
186 /*int completeBER(unsigned char *buf, int len); */ /* from the ODR module */
187 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
196 typedef struct tcpip_state
198 char *altbuf; /* alternate buffer for surplus data */
199 int altsize; /* size as xmalloced */
200 int altlen; /* length of data or 0 if none */
202 int written; /* -1 if we aren't writing */
203 int towrite; /* to verify against user input */
204 int (*complete)(unsigned char *buf, int len); /* length/completeness */
205 struct sockaddr_in addr; /* returned by cs_straddr */
206 char buf[128]; /* returned by cs_addrstr */
210 static int tcpip_init (void)
212 static int initialized = 0;
218 requested = MAKEWORD(1, 1);
219 if (WSAStartup(requested, &wd))
226 static int tcpip_init (void)
232 * This function is always called through the cs_create() macro.
233 * s >= 0: socket has already been established for us.
235 COMSTACK tcpip_type(int s, int blocking, int protocol)
241 unsigned long tru = 1;
243 struct protoent *proto;
251 if (!(proto = getprotobyname("tcp")))
253 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
255 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
262 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
264 if (!(state = (struct tcpip_state *)(p->cprivate =
265 xmalloc(sizeof(tcpip_state)))))
269 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
271 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
276 p->type = tcpip_type;
277 p->protocol = (enum oid_proto) protocol;
279 p->f_connect = tcpip_connect;
280 p->f_rcvconnect = tcpip_rcvconnect;
281 p->f_get = tcpip_get;
282 p->f_put = tcpip_put;
283 p->f_close = tcpip_close;
284 p->f_more = tcpip_more;
285 p->f_bind = tcpip_bind;
286 p->f_listen = tcpip_listen;
287 p->f_accept = tcpip_accept;
288 p->f_addrstr = tcpip_addrstr;
289 p->f_straddr = tcpip_straddr;
291 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
297 state->altsize = state->altlen = 0;
298 state->towrite = state->written = -1;
299 if (protocol == PROTO_WAIS)
300 state->complete = completeWAIS;
302 state->complete = completeBER;
304 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
305 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
310 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
314 short int port = 210;
319 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
320 add->sin_family = AF_INET;
322 if ((p = strchr(buf, ':')))
327 add->sin_port = htons(port);
328 if (!strcmp("@", buf))
329 add->sin_addr.s_addr = INADDR_ANY;
330 else if ((hp = gethostbyname(buf)))
331 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
332 sizeof(struct in_addr));
333 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
334 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
340 void *tcpip_straddr(COMSTACK h, const char *str)
342 tcpip_state *sp = (tcpip_state *)h->cprivate;
344 if (!tcpip_strtoaddr_ex (str, &sp->addr))
349 struct sockaddr_in *tcpip_strtoaddr(const char *str)
351 static struct sockaddr_in add;
353 if (!tcpip_strtoaddr_ex (str, &add))
358 int tcpip_more(COMSTACK h)
360 tcpip_state *sp = (tcpip_state *)h->cprivate;
362 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
367 * connect(2) will block (sometimes) - nothing we can do short of doing
368 * weird things like spawning subprocesses or threading or some weird junk
371 int tcpip_connect(COMSTACK h, void *address)
373 struct sockaddr_in *add = (struct sockaddr_in *)address;
375 TRC(fprintf(stderr, "tcpip_connect\n"));
376 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
379 if (WSAGetLastError() == WSAEWOULDBLOCK)
381 if (errno == EINPROGRESS)
386 h->state = CS_DATAXFER;
393 int tcpip_rcvconnect(COMSTACK h)
395 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
399 int tcpip_bind(COMSTACK h, void *address, int mode)
401 struct sockaddr *addr = (struct sockaddr *)address;
405 unsigned long one = 1;
408 TRC(fprintf(stderr, "tcpip_bind\n"));
409 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
410 &one, sizeof(one)) < 0)
415 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
420 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
430 void tcpip_get_ip(COMSTACK h, char *ip_buf)
432 struct tcpip_state *sp = (tcpip_state *)h->cprivate;
433 const char *ip_addr = (const char *) (&sp->addr->sin_addr.s_addr);
436 for (i = 0; i<4; i++)
437 TRC (fprintf (stderr, "%u ", ip_addr[i]));
438 TRC (fprintf (stderr, "\n"));
442 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
443 int (*check_ip)(void *cd, const char *a, int len, int type),
446 struct sockaddr_in addr;
447 int len = sizeof(addr);
449 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
450 if (h->state != CS_IDLE)
452 h->cerrno = CSOUTSTATE;
455 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
458 if (WSAGetLastError() == WSAEWOULDBLOCK)
460 if (errno == EWOULDBLOCK)
463 h->cerrno = CSNODATA;
468 if (addrlen && *addrlen >= sizeof(struct sockaddr_in))
469 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
472 if (check_ip && (*check_ip)(cd, (const char *) &addr.sin_addr,
473 sizeof(addr.sin_addr), AF_INET))
477 closesocket(h->iofile);
487 COMSTACK tcpip_accept(COMSTACK h)
490 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
492 unsigned long tru = 1;
495 TRC(fprintf(stderr, "tcpip_accept\n"));
496 if (h->state != CS_INCON)
498 h->cerrno = CSOUTSTATE;
501 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
506 memcpy(cnew, h, sizeof(*h));
507 cnew->iofile = h->newfd;
508 if (!(state = (tcpip_state *)(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)
571 if (errno == EINPROGRESS || errno == EWOULDBLOCK)
573 if (errno == EWOULDBLOCK)
583 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
585 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
587 /* move surplus buffer (or everything if we didn't get a BER rec.) */
588 if (hasread > berlen)
590 tomove = req = hasread - berlen;
591 rest = tomove % CS_TCPIP_BUFCHUNK;
593 req += CS_TCPIP_BUFCHUNK - rest;
596 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
598 } else if (sp->altsize < req)
599 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
601 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
602 (unsigned) sp->altbuf));
603 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
605 if (berlen < CS_TCPIP_BUFCHUNK - 1)
606 *(*buf + berlen) = '\0';
607 return berlen ? berlen : 1;
612 * In nonblocking mode, you must call again with same buffer while
615 int tcpip_put(COMSTACK h, char *buf, int size)
618 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
620 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
621 if (state->towrite < 0)
623 state->towrite = size;
626 else if (state->towrite != size)
628 h->cerrno = CSWRONGBUF;
631 while (state->towrite > state->written)
633 if ((res = send(h->iofile, buf + state->written, size -
634 state->written, 0)) < 0)
637 if (WSAGetLastError() == WSAEWOULDBLOCK)
642 TRC(fprintf(stderr, " Flow control stop\n"));
648 state->written += res;
649 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
650 res, state->written, size));
652 state->towrite = state->written = -1;
653 TRC(fprintf(stderr, " Ok\n"));
657 int tcpip_close(COMSTACK h)
659 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
661 TRC(fprintf(stderr, "tcpip_close\n"));
664 closesocket(h->iofile);
675 char *tcpip_addrstr(COMSTACK h)
677 struct sockaddr_in addr;
678 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
679 char *r, *buf = sp->buf;
681 struct hostent *host;
684 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
689 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
691 r = (char*) host->h_name;
693 r = inet_ntoa(addr.sin_addr);
694 sprintf(buf, "tcp:%s", r);