2 * Copyright (c) 1995-1998, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.23 1998-06-23 15:37:50 adam
8 * Added type cast to prevent warning.
10 * Revision 1.22 1998/06/22 11:32:36 adam
11 * Added 'conditional cs_listen' feature.
13 * Revision 1.21 1998/05/20 09:55:32 adam
14 * Function tcpip_get treats EINPROGRESS error in the same way as
15 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
16 * Solaris in some cases.
18 * Revision 1.20 1998/05/18 10:10:40 adam
19 * Minor change to avoid C++ warning.
21 * Revision 1.19 1998/02/11 11:53:33 adam
22 * Changed code so that it compiles as C++.
24 * Revision 1.18 1997/09/29 07:15:25 adam
25 * Changed use of setsockopt to avoid warnings on MSVC.
27 * Revision 1.17 1997/09/17 12:10:30 adam
30 * Revision 1.16 1997/09/01 08:49:14 adam
31 * New windows NT/95 port using MSV5.0. Minor changes only.
33 * Revision 1.15 1997/05/14 06:53:33 adam
36 * Revision 1.14 1997/05/01 15:06:32 adam
37 * Moved WINSOCK init. code to tcpip_init routine.
39 * Revision 1.13 1996/11/01 08:45:18 adam
40 * Bug fix: used close on MS-Windows. Fixed to closesocket.
42 * Revision 1.12 1996/07/06 19:58:30 quinn
43 * System headerfiles gathered in yconfig
45 * Revision 1.11 1996/02/23 10:00:39 quinn
48 * Revision 1.10 1996/02/20 12:52:11 quinn
49 * WAIS protocol support.
51 * Revision 1.9 1996/02/10 12:23:11 quinn
52 * Enablie inetd operations fro TCP/IP stack
54 * Revision 1.8 1995/11/01 13:54:27 quinn
57 * Revision 1.7 1995/10/30 12:41:16 quinn
58 * Added hostname lookup for server.
60 * Revision 1.6 1995/09/29 17:12:00 quinn
63 * Revision 1.5 1995/09/29 17:01:48 quinn
66 * Revision 1.4 1995/09/28 10:12:26 quinn
67 * Windows-support changes
69 * Revision 1.3 1995/09/27 15:02:45 quinn
70 * Modified function heads & prototypes.
72 * Revision 1.2 1995/06/15 12:30:06 quinn
73 * Added @ as hostname alias for INADDR ANY.
75 * Revision 1.1 1995/06/14 09:58:20 quinn
76 * Renamed yazlib to comstack.
78 * Revision 1.20 1995/05/16 08:51:16 quinn
79 * License, documentation, and memory fixes
81 * Revision 1.19 1995/04/10 10:24:08 quinn
84 * Revision 1.18 1995/03/30 13:29:27 quinn
85 * Added REUSEADDR in tcpip_bind
87 * Revision 1.17 1995/03/27 08:36:10 quinn
88 * Some work on nonblocking operation in xmosi.c and rfct.c.
89 * Added protocol parameter to cs_create()
91 * Revision 1.16 1995/03/21 15:53:41 quinn
94 * Revision 1.15 1995/03/21 12:31:27 quinn
95 * Added check for EINPROGRESS on connect.
97 * Revision 1.14 1995/03/20 09:47:21 quinn
98 * Added server-side support to xmosi.c
99 * Fixed possible problems in rfct
102 * Revision 1.13 1995/03/15 16:15:13 adam
105 * Revision 1.12 1995/03/15 15:36:27 quinn
106 * Mods to support nonblocking I/O
108 * Revision 1.11 1995/03/15 08:37:57 quinn
109 * Now we're pretty much set for nonblocking I/O.
111 * Revision 1.10 1995/03/14 17:00:07 quinn
112 * Bug-fixes - added tracing info to tcpip.c
114 * Revision 1.9 1995/03/14 10:28:42 quinn
115 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
117 * Revision 1.8 1995/03/10 14:22:50 quinn
118 * Removed debug output.
120 * Revision 1.7 1995/03/10 11:44:59 quinn
121 * Fixes and debugging
123 * Revision 1.6 1995/03/07 10:26:55 quinn
124 * Initialized type field in the comstacks.
126 * Revision 1.5 1995/02/14 20:40:07 quinn
129 * Revision 1.4 1995/02/14 11:54:49 quinn
130 * Beginning to add full CCL.
132 * Revision 1.3 1995/02/10 18:58:10 quinn
133 * Fixed tcpip_get (formerly tcpip_read).
134 * Turned tst (cli) into a proper, event-driven thingy.
136 * Revision 1.2 1995/02/10 15:55:47 quinn
139 * Revision 1.1 1995/02/09 15:51:52 quinn
153 #include <comstack.h>
156 /* Chas added the following 2, so we get the definition of completeBER */
160 int tcpip_close(COMSTACK h);
161 int tcpip_put(COMSTACK h, char *buf, int size);
162 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
163 int tcpip_connect(COMSTACK h, void *address);
164 int tcpip_more(COMSTACK h);
165 int tcpip_rcvconnect(COMSTACK h);
166 int tcpip_bind(COMSTACK h, void *address, int mode);
167 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
168 int (*check_ip)(void *cd, const char *a, int len, int type),
171 COMSTACK tcpip_accept(COMSTACK h);
172 char *tcpip_addrstr(COMSTACK h);
173 void *tcpip_straddr(COMSTACK h, const char *str);
176 * Determine length/completeness of incoming packages
178 /* Chas: Removed the definition of completeBERfrom here, use the one in the */
179 /* include directory as that as the extern "C" around it */
180 /*int completeBER(unsigned char *buf, int len); */ /* from the ODR module */
181 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
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)(unsigned char *buf, int len); /* length/completeness */
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));
468 if (check_ip && (*check_ip)(cd, (const char *) &addr.sin_addr,
469 sizeof(addr.sin_addr), AF_INET))
480 COMSTACK tcpip_accept(COMSTACK h)
483 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
485 unsigned long tru = 1;
488 TRC(fprintf(stderr, "tcpip_accept\n"));
489 if (h->state != CS_INCON)
491 h->cerrno = CSOUTSTATE;
494 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
499 memcpy(cnew, h, sizeof(*h));
500 cnew->iofile = h->newfd;
501 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
507 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
509 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
513 state->altsize = state->altlen = 0;
514 state->towrite = state->written = -1;
515 state->complete = st->complete;
516 cnew->state = CS_DATAXFER;
521 #define CS_TCPIP_BUFCHUNK 4096
524 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
525 * 0=connection closed.
527 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
529 tcpip_state *sp = (tcpip_state *)h->cprivate;
531 int tmpi, berlen, rest, req, tomove;
532 int hasread = 0, res;
534 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
535 if (sp->altlen) /* switch buffers */
537 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
538 (unsigned) sp->altbuf));
542 *bufsize = sp->altsize;
543 hasread = sp->altlen;
548 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
552 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
555 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
556 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
558 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
560 if (WSAGetLastError() == WSAEWOULDBLOCK)
563 if (errno == EINPROGRESS || errno == EWOULDBLOCK)
565 if (errno == EWOULDBLOCK)
574 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
576 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
578 /* move surplus buffer (or everything if we didn't get a BER rec.) */
579 if (hasread > berlen)
581 tomove = req = hasread - berlen;
582 rest = tomove % CS_TCPIP_BUFCHUNK;
584 req += CS_TCPIP_BUFCHUNK - rest;
587 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
589 } else if (sp->altsize < req)
590 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
592 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
593 (unsigned) sp->altbuf));
594 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
596 if (berlen < CS_TCPIP_BUFCHUNK - 1)
597 *(*buf + berlen) = '\0';
598 return berlen ? berlen : 1;
603 * In nonblocking mode, you must call again with same buffer while
606 int tcpip_put(COMSTACK h, char *buf, int size)
609 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
611 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
612 if (state->towrite < 0)
614 state->towrite = size;
617 else if (state->towrite != size)
619 h->cerrno = CSWRONGBUF;
622 while (state->towrite > state->written)
624 if ((res = send(h->iofile, buf + state->written, size -
625 state->written, 0)) < 0)
628 if (WSAGetLastError() == WSAEWOULDBLOCK)
633 TRC(fprintf(stderr, " Flow control stop\n"));
639 state->written += res;
640 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
641 res, state->written, size));
643 state->towrite = state->written = -1;
644 TRC(fprintf(stderr, " Ok\n"));
648 int tcpip_close(COMSTACK h)
650 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
652 TRC(fprintf(stderr, "tcpip_close\n"));
655 closesocket(h->iofile);
666 char *tcpip_addrstr(COMSTACK h)
668 struct sockaddr_in addr;
669 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
670 char *r, *buf = sp->buf;
672 struct hostent *host;
675 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
680 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
682 r = (char*) host->h_name;
684 r = inet_ntoa(addr.sin_addr);
685 sprintf(buf, "tcp:%s", r);