2 * Copyright (c) 1995-1998, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.24 1998-06-29 07:59:17 adam
10 * Revision 1.23 1998/06/23 15:37:50 adam
11 * Added type cast to prevent warning.
13 * Revision 1.22 1998/06/22 11:32:36 adam
14 * Added 'conditional cs_listen' feature.
16 * Revision 1.21 1998/05/20 09:55:32 adam
17 * Function tcpip_get treats EINPROGRESS error in the same way as
18 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
19 * Solaris in some cases.
21 * Revision 1.20 1998/05/18 10:10:40 adam
22 * Minor change to avoid C++ warning.
24 * Revision 1.19 1998/02/11 11:53:33 adam
25 * Changed code so that it compiles as C++.
27 * Revision 1.18 1997/09/29 07:15:25 adam
28 * Changed use of setsockopt to avoid warnings on MSVC.
30 * Revision 1.17 1997/09/17 12:10:30 adam
33 * Revision 1.16 1997/09/01 08:49:14 adam
34 * New windows NT/95 port using MSV5.0. Minor changes only.
36 * Revision 1.15 1997/05/14 06:53:33 adam
39 * Revision 1.14 1997/05/01 15:06:32 adam
40 * Moved WINSOCK init. code to tcpip_init routine.
42 * Revision 1.13 1996/11/01 08:45:18 adam
43 * Bug fix: used close on MS-Windows. Fixed to closesocket.
45 * Revision 1.12 1996/07/06 19:58:30 quinn
46 * System headerfiles gathered in yconfig
48 * Revision 1.11 1996/02/23 10:00:39 quinn
51 * Revision 1.10 1996/02/20 12:52:11 quinn
52 * WAIS protocol support.
54 * Revision 1.9 1996/02/10 12:23:11 quinn
55 * Enablie inetd operations fro TCP/IP stack
57 * Revision 1.8 1995/11/01 13:54:27 quinn
60 * Revision 1.7 1995/10/30 12:41:16 quinn
61 * Added hostname lookup for server.
63 * Revision 1.6 1995/09/29 17:12:00 quinn
66 * Revision 1.5 1995/09/29 17:01:48 quinn
69 * Revision 1.4 1995/09/28 10:12:26 quinn
70 * Windows-support changes
72 * Revision 1.3 1995/09/27 15:02:45 quinn
73 * Modified function heads & prototypes.
75 * Revision 1.2 1995/06/15 12:30:06 quinn
76 * Added @ as hostname alias for INADDR ANY.
78 * Revision 1.1 1995/06/14 09:58:20 quinn
79 * Renamed yazlib to comstack.
81 * Revision 1.20 1995/05/16 08:51:16 quinn
82 * License, documentation, and memory fixes
84 * Revision 1.19 1995/04/10 10:24:08 quinn
87 * Revision 1.18 1995/03/30 13:29:27 quinn
88 * Added REUSEADDR in tcpip_bind
90 * Revision 1.17 1995/03/27 08:36:10 quinn
91 * Some work on nonblocking operation in xmosi.c and rfct.c.
92 * Added protocol parameter to cs_create()
94 * Revision 1.16 1995/03/21 15:53:41 quinn
97 * Revision 1.15 1995/03/21 12:31:27 quinn
98 * Added check for EINPROGRESS on connect.
100 * Revision 1.14 1995/03/20 09:47:21 quinn
101 * Added server-side support to xmosi.c
102 * Fixed possible problems in rfct
105 * Revision 1.13 1995/03/15 16:15:13 adam
108 * Revision 1.12 1995/03/15 15:36:27 quinn
109 * Mods to support nonblocking I/O
111 * Revision 1.11 1995/03/15 08:37:57 quinn
112 * Now we're pretty much set for nonblocking I/O.
114 * Revision 1.10 1995/03/14 17:00:07 quinn
115 * Bug-fixes - added tracing info to tcpip.c
117 * Revision 1.9 1995/03/14 10:28:42 quinn
118 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
120 * Revision 1.8 1995/03/10 14:22:50 quinn
121 * Removed debug output.
123 * Revision 1.7 1995/03/10 11:44:59 quinn
124 * Fixes and debugging
126 * Revision 1.6 1995/03/07 10:26:55 quinn
127 * Initialized type field in the comstacks.
129 * Revision 1.5 1995/02/14 20:40:07 quinn
132 * Revision 1.4 1995/02/14 11:54:49 quinn
133 * Beginning to add full CCL.
135 * Revision 1.3 1995/02/10 18:58:10 quinn
136 * Fixed tcpip_get (formerly tcpip_read).
137 * Turned tst (cli) into a proper, event-driven thingy.
139 * Revision 1.2 1995/02/10 15:55:47 quinn
142 * Revision 1.1 1995/02/09 15:51:52 quinn
156 #include <comstack.h>
159 /* Chas added the following 2, so we get the definition of completeBER */
163 int tcpip_close(COMSTACK h);
164 int tcpip_put(COMSTACK h, char *buf, int size);
165 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
166 int tcpip_connect(COMSTACK h, void *address);
167 int tcpip_more(COMSTACK h);
168 int tcpip_rcvconnect(COMSTACK h);
169 int tcpip_bind(COMSTACK h, void *address, int mode);
170 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
171 int (*check_ip)(void *cd, const char *a, int len, int type),
174 COMSTACK tcpip_accept(COMSTACK h);
175 char *tcpip_addrstr(COMSTACK h);
176 void *tcpip_straddr(COMSTACK h, const char *str);
179 * Determine length/completeness of incoming packages
181 /* Chas: Removed the definition of completeBERfrom here, use the one in the */
182 /* include directory as that as the extern "C" around it */
183 /*int completeBER(unsigned char *buf, int len); */ /* from the ODR module */
184 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
193 typedef struct tcpip_state
195 char *altbuf; /* alternate buffer for surplus data */
196 int altsize; /* size as xmalloced */
197 int altlen; /* length of data or 0 if none */
199 int written; /* -1 if we aren't writing */
200 int towrite; /* to verify against user input */
201 int (*complete)(unsigned char *buf, int len); /* length/completeness */
202 struct sockaddr_in addr; /* returned by cs_straddr */
203 char buf[128]; /* returned by cs_addrstr */
207 static int tcpip_init (void)
209 static int initialized = 0;
215 requested = MAKEWORD(1, 1);
216 if (WSAStartup(requested, &wd))
223 static int tcpip_init (void)
229 * This function is always called through the cs_create() macro.
230 * s >= 0: socket has already been established for us.
232 COMSTACK tcpip_type(int s, int blocking, int protocol)
238 unsigned long tru = 1;
240 struct protoent *proto;
248 if (!(proto = getprotobyname("tcp")))
250 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
252 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
259 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
261 if (!(state = (struct tcpip_state *)(p->cprivate =
262 xmalloc(sizeof(tcpip_state)))))
266 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
268 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
273 p->type = tcpip_type;
274 p->protocol = (enum oid_proto) protocol;
276 p->f_connect = tcpip_connect;
277 p->f_rcvconnect = tcpip_rcvconnect;
278 p->f_get = tcpip_get;
279 p->f_put = tcpip_put;
280 p->f_close = tcpip_close;
281 p->f_more = tcpip_more;
282 p->f_bind = tcpip_bind;
283 p->f_listen = tcpip_listen;
284 p->f_accept = tcpip_accept;
285 p->f_addrstr = tcpip_addrstr;
286 p->f_straddr = tcpip_straddr;
288 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
294 state->altsize = state->altlen = 0;
295 state->towrite = state->written = -1;
296 if (protocol == PROTO_WAIS)
297 state->complete = completeWAIS;
299 state->complete = completeBER;
301 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
302 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
307 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
311 short int port = 210;
316 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
317 add->sin_family = AF_INET;
319 if ((p = strchr(buf, ':')))
324 add->sin_port = htons(port);
325 if (!strcmp("@", buf))
326 add->sin_addr.s_addr = INADDR_ANY;
327 else if ((hp = gethostbyname(buf)))
328 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
329 sizeof(struct in_addr));
330 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
331 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
337 void *tcpip_straddr(COMSTACK h, const char *str)
339 tcpip_state *sp = (tcpip_state *)h->cprivate;
341 if (!tcpip_strtoaddr_ex (str, &sp->addr))
346 struct sockaddr_in *tcpip_strtoaddr(const char *str)
348 static struct sockaddr_in add;
350 if (!tcpip_strtoaddr_ex (str, &add))
355 int tcpip_more(COMSTACK h)
357 tcpip_state *sp = (tcpip_state *)h->cprivate;
359 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
364 * connect(2) will block (sometimes) - nothing we can do short of doing
365 * weird things like spawning subprocesses or threading or some weird junk
368 int tcpip_connect(COMSTACK h, void *address)
370 struct sockaddr_in *add = (struct sockaddr_in *)address;
372 TRC(fprintf(stderr, "tcpip_connect\n"));
373 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
376 if (WSAGetLastError() == WSAEWOULDBLOCK)
378 if (errno == EINPROGRESS)
383 h->state = CS_DATAXFER;
390 int tcpip_rcvconnect(COMSTACK h)
392 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
396 int tcpip_bind(COMSTACK h, void *address, int mode)
398 struct sockaddr *addr = (struct sockaddr *)address;
402 unsigned long one = 1;
405 TRC(fprintf(stderr, "tcpip_bind\n"));
406 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
407 &one, sizeof(one)) < 0)
412 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
417 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
427 void tcpip_get_ip(COMSTACK h, char *ip_buf)
429 struct tcpip_state *sp = (tcpip_state *)h->cprivate;
430 const char *ip_addr = (const char *) (&sp->addr->sin_addr.s_addr);
433 for (i = 0; i<4; i++)
434 TRC (fprintf (stderr, "%u ", ip_addr[i]));
435 TRC (fprintf (stderr, "\n"));
439 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
440 int (*check_ip)(void *cd, const char *a, int len, int type),
443 struct sockaddr_in addr;
444 int len = sizeof(addr);
446 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
447 if (h->state != CS_IDLE)
449 h->cerrno = CSOUTSTATE;
452 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
455 if (WSAGetLastError() == WSAEWOULDBLOCK)
457 if (errno == EWOULDBLOCK)
460 h->cerrno = CSNODATA;
465 if (addrlen && *addrlen >= sizeof(struct sockaddr_in))
466 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
469 if (check_ip && (*check_ip)(cd, (const char *) &addr.sin_addr,
470 sizeof(addr.sin_addr), AF_INET))
474 closesocket(h->iofile);
484 COMSTACK tcpip_accept(COMSTACK h)
487 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
489 unsigned long tru = 1;
492 TRC(fprintf(stderr, "tcpip_accept\n"));
493 if (h->state != CS_INCON)
495 h->cerrno = CSOUTSTATE;
498 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
503 memcpy(cnew, h, sizeof(*h));
504 cnew->iofile = h->newfd;
505 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
511 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
513 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
517 state->altsize = state->altlen = 0;
518 state->towrite = state->written = -1;
519 state->complete = st->complete;
520 cnew->state = CS_DATAXFER;
525 #define CS_TCPIP_BUFCHUNK 4096
528 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
529 * 0=connection closed.
531 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
533 tcpip_state *sp = (tcpip_state *)h->cprivate;
535 int tmpi, berlen, rest, req, tomove;
536 int hasread = 0, res;
538 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
539 if (sp->altlen) /* switch buffers */
541 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
542 (unsigned) sp->altbuf));
546 *bufsize = sp->altsize;
547 hasread = sp->altlen;
552 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
556 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
559 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
560 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
562 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
564 if (WSAGetLastError() == WSAEWOULDBLOCK)
567 if (errno == EINPROGRESS || errno == EWOULDBLOCK)
569 if (errno == EWOULDBLOCK)
578 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
580 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
582 /* move surplus buffer (or everything if we didn't get a BER rec.) */
583 if (hasread > berlen)
585 tomove = req = hasread - berlen;
586 rest = tomove % CS_TCPIP_BUFCHUNK;
588 req += CS_TCPIP_BUFCHUNK - rest;
591 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
593 } else if (sp->altsize < req)
594 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
596 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
597 (unsigned) sp->altbuf));
598 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
600 if (berlen < CS_TCPIP_BUFCHUNK - 1)
601 *(*buf + berlen) = '\0';
602 return berlen ? berlen : 1;
607 * In nonblocking mode, you must call again with same buffer while
610 int tcpip_put(COMSTACK h, char *buf, int size)
613 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
615 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
616 if (state->towrite < 0)
618 state->towrite = size;
621 else if (state->towrite != size)
623 h->cerrno = CSWRONGBUF;
626 while (state->towrite > state->written)
628 if ((res = send(h->iofile, buf + state->written, size -
629 state->written, 0)) < 0)
632 if (WSAGetLastError() == WSAEWOULDBLOCK)
637 TRC(fprintf(stderr, " Flow control stop\n"));
643 state->written += res;
644 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
645 res, state->written, size));
647 state->towrite = state->written = -1;
648 TRC(fprintf(stderr, " Ok\n"));
652 int tcpip_close(COMSTACK h)
654 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
656 TRC(fprintf(stderr, "tcpip_close\n"));
659 closesocket(h->iofile);
670 char *tcpip_addrstr(COMSTACK h)
672 struct sockaddr_in addr;
673 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
674 char *r, *buf = sp->buf;
676 struct hostent *host;
679 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
684 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
686 r = (char*) host->h_name;
688 r = inet_ntoa(addr.sin_addr);
689 sprintf(buf, "tcp:%s", r);