2 * Copyright (c) 1995-1998, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.20 1998-05-18 10:10:40 adam
8 * Minor change to avoid C++ warning.
10 * Revision 1.19 1998/02/11 11:53:33 adam
11 * Changed code so that it compiles as C++.
13 * Revision 1.18 1997/09/29 07:15:25 adam
14 * Changed use of setsockopt to avoid warnings on MSVC.
16 * Revision 1.17 1997/09/17 12:10:30 adam
19 * Revision 1.16 1997/09/01 08:49:14 adam
20 * New windows NT/95 port using MSV5.0. Minor changes only.
22 * Revision 1.15 1997/05/14 06:53:33 adam
25 * Revision 1.14 1997/05/01 15:06:32 adam
26 * Moved WINSOCK init. code to tcpip_init routine.
28 * Revision 1.13 1996/11/01 08:45:18 adam
29 * Bug fix: used close on MS-Windows. Fixed to closesocket.
31 * Revision 1.12 1996/07/06 19:58:30 quinn
32 * System headerfiles gathered in yconfig
34 * Revision 1.11 1996/02/23 10:00:39 quinn
37 * Revision 1.10 1996/02/20 12:52:11 quinn
38 * WAIS protocol support.
40 * Revision 1.9 1996/02/10 12:23:11 quinn
41 * Enablie inetd operations fro TCP/IP stack
43 * Revision 1.8 1995/11/01 13:54:27 quinn
46 * Revision 1.7 1995/10/30 12:41:16 quinn
47 * Added hostname lookup for server.
49 * Revision 1.6 1995/09/29 17:12:00 quinn
52 * Revision 1.5 1995/09/29 17:01:48 quinn
55 * Revision 1.4 1995/09/28 10:12:26 quinn
56 * Windows-support changes
58 * Revision 1.3 1995/09/27 15:02:45 quinn
59 * Modified function heads & prototypes.
61 * Revision 1.2 1995/06/15 12:30:06 quinn
62 * Added @ as hostname alias for INADDR ANY.
64 * Revision 1.1 1995/06/14 09:58:20 quinn
65 * Renamed yazlib to comstack.
67 * Revision 1.20 1995/05/16 08:51:16 quinn
68 * License, documentation, and memory fixes
70 * Revision 1.19 1995/04/10 10:24:08 quinn
73 * Revision 1.18 1995/03/30 13:29:27 quinn
74 * Added REUSEADDR in tcpip_bind
76 * Revision 1.17 1995/03/27 08:36:10 quinn
77 * Some work on nonblocking operation in xmosi.c and rfct.c.
78 * Added protocol parameter to cs_create()
80 * Revision 1.16 1995/03/21 15:53:41 quinn
83 * Revision 1.15 1995/03/21 12:31:27 quinn
84 * Added check for EINPROGRESS on connect.
86 * Revision 1.14 1995/03/20 09:47:21 quinn
87 * Added server-side support to xmosi.c
88 * Fixed possible problems in rfct
91 * Revision 1.13 1995/03/15 16:15:13 adam
94 * Revision 1.12 1995/03/15 15:36:27 quinn
95 * Mods to support nonblocking I/O
97 * Revision 1.11 1995/03/15 08:37:57 quinn
98 * Now we're pretty much set for nonblocking I/O.
100 * Revision 1.10 1995/03/14 17:00:07 quinn
101 * Bug-fixes - added tracing info to tcpip.c
103 * Revision 1.9 1995/03/14 10:28:42 quinn
104 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
106 * Revision 1.8 1995/03/10 14:22:50 quinn
107 * Removed debug output.
109 * Revision 1.7 1995/03/10 11:44:59 quinn
110 * Fixes and debugging
112 * Revision 1.6 1995/03/07 10:26:55 quinn
113 * Initialized type field in the comstacks.
115 * Revision 1.5 1995/02/14 20:40:07 quinn
118 * Revision 1.4 1995/02/14 11:54:49 quinn
119 * Beginning to add full CCL.
121 * Revision 1.3 1995/02/10 18:58:10 quinn
122 * Fixed tcpip_get (formerly tcpip_read).
123 * Turned tst (cli) into a proper, event-driven thingy.
125 * Revision 1.2 1995/02/10 15:55:47 quinn
128 * Revision 1.1 1995/02/09 15:51:52 quinn
142 #include <comstack.h>
145 /* Chas added the following 2, so we get the definition of completeBER */
149 int tcpip_close(COMSTACK h);
150 int tcpip_put(COMSTACK h, char *buf, int size);
151 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
152 int tcpip_connect(COMSTACK h, void *address);
153 int tcpip_more(COMSTACK h);
154 int tcpip_rcvconnect(COMSTACK h);
155 int tcpip_bind(COMSTACK h, void *address, int mode);
156 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
157 COMSTACK tcpip_accept(COMSTACK h);
158 char *tcpip_addrstr(COMSTACK h);
159 void *tcpip_straddr(COMSTACK h, const char *str);
162 * Determine length/completeness of incoming packages
164 /* Chas: Removed the definition of completeBERfrom here, use the one in the */
165 /* include directory as that as the extern "C" around it */
166 /*int completeBER(unsigned char *buf, int len); */ /* from the ODR module */
167 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
175 typedef struct tcpip_state
177 char *altbuf; /* alternate buffer for surplus data */
178 int altsize; /* size as xmalloced */
179 int altlen; /* length of data or 0 if none */
181 int written; /* -1 if we aren't writing */
182 int towrite; /* to verify against user input */
183 int (*complete)(unsigned char *buf, int len); /* length/completeness */
184 struct sockaddr_in addr; /* returned by cs_straddr */
185 char buf[128]; /* returned by cs_addrstr */
189 static int tcpip_init (void)
191 static int initialized = 0;
197 requested = MAKEWORD(1, 1);
198 if (WSAStartup(requested, &wd))
205 static int tcpip_init (void)
211 * This function is always called through the cs_create() macro.
212 * s >= 0: socket has already been established for us.
214 COMSTACK tcpip_type(int s, int blocking, int protocol)
220 unsigned long tru = 1;
222 struct protoent *proto;
230 if (!(proto = getprotobyname("tcp")))
232 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
234 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
241 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
243 if (!(state = (struct tcpip_state *)(p->cprivate =
244 xmalloc(sizeof(tcpip_state)))))
248 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
250 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
255 p->type = tcpip_type;
256 p->protocol = (enum oid_proto) protocol;
258 p->f_connect = tcpip_connect;
259 p->f_rcvconnect = tcpip_rcvconnect;
260 p->f_get = tcpip_get;
261 p->f_put = tcpip_put;
262 p->f_close = tcpip_close;
263 p->f_more = tcpip_more;
264 p->f_bind = tcpip_bind;
265 p->f_listen = tcpip_listen;
266 p->f_accept = tcpip_accept;
267 p->f_addrstr = tcpip_addrstr;
268 p->f_straddr = tcpip_straddr;
270 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
276 state->altsize = state->altlen = 0;
277 state->towrite = state->written = -1;
278 if (protocol == PROTO_WAIS)
279 state->complete = completeWAIS;
281 state->complete = completeBER;
283 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
284 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
289 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
293 short int port = 210;
298 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
299 add->sin_family = AF_INET;
301 if ((p = strchr(buf, ':')))
306 add->sin_port = htons(port);
307 if (!strcmp("@", buf))
308 add->sin_addr.s_addr = INADDR_ANY;
309 else if ((hp = gethostbyname(buf)))
310 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
311 sizeof(struct in_addr));
312 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
313 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
319 void *tcpip_straddr(COMSTACK h, const char *str)
321 tcpip_state *sp = (tcpip_state *)h->cprivate;
323 if (!tcpip_strtoaddr_ex (str, &sp->addr))
328 struct sockaddr_in *tcpip_strtoaddr(const char *str)
330 static struct sockaddr_in add;
332 if (!tcpip_strtoaddr_ex (str, &add))
337 int tcpip_more(COMSTACK h)
339 tcpip_state *sp = (tcpip_state *)h->cprivate;
341 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
346 * connect(2) will block (sometimes) - nothing we can do short of doing
347 * weird things like spawning subprocesses or threading or some weird junk
350 int tcpip_connect(COMSTACK h, void *address)
352 struct sockaddr_in *add = (struct sockaddr_in *)address;
354 TRC(fprintf(stderr, "tcpip_connect\n"));
355 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
358 if (WSAGetLastError() == WSAEWOULDBLOCK)
360 if (errno == EINPROGRESS)
365 h->state = CS_DATAXFER;
372 int tcpip_rcvconnect(COMSTACK h)
374 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
378 int tcpip_bind(COMSTACK h, void *address, int mode)
380 struct sockaddr *addr = (struct sockaddr *)address;
384 unsigned long one = 1;
387 TRC(fprintf(stderr, "tcpip_bind\n"));
388 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
389 &one, sizeof(one)) < 0)
394 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
399 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
408 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
410 struct sockaddr_in addr;
411 int len = sizeof(addr);
413 TRC(fprintf(stderr, "tcpip_listen\n"));
414 if (h->state != CS_IDLE)
416 h->cerrno = CSOUTSTATE;
419 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
422 if (WSAGetLastError() == WSAEWOULDBLOCK)
424 if (errno == EWOULDBLOCK)
427 h->cerrno = CSNODATA;
432 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
433 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
440 COMSTACK tcpip_accept(COMSTACK h)
443 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
445 unsigned long tru = 1;
448 TRC(fprintf(stderr, "tcpip_accept\n"));
449 if (h->state != CS_INCON)
451 h->cerrno = CSOUTSTATE;
454 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
459 memcpy(cnew, h, sizeof(*h));
460 cnew->iofile = h->newfd;
461 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
467 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
469 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
473 state->altsize = state->altlen = 0;
474 state->towrite = state->written = -1;
475 state->complete = st->complete;
476 cnew->state = CS_DATAXFER;
481 #define CS_TCPIP_BUFCHUNK 4096
484 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
485 * 0=connection closed.
487 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
489 tcpip_state *sp = (tcpip_state *)h->cprivate;
491 int tmpi, berlen, rest, req, tomove;
492 int hasread = 0, res;
494 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
495 if (sp->altlen) /* switch buffers */
497 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
498 (unsigned) sp->altbuf));
502 *bufsize = sp->altsize;
503 hasread = sp->altlen;
508 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
512 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
515 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
516 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
518 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
520 if (WSAGetLastError() == WSAEWOULDBLOCK)
522 if (errno == EWOULDBLOCK)
530 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
532 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
534 /* move surplus buffer (or everything if we didn't get a BER rec.) */
535 if (hasread > berlen)
537 tomove = req = hasread - berlen;
538 rest = tomove % CS_TCPIP_BUFCHUNK;
540 req += CS_TCPIP_BUFCHUNK - rest;
543 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
545 } else if (sp->altsize < req)
546 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
548 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
549 (unsigned) sp->altbuf));
550 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
552 if (berlen < CS_TCPIP_BUFCHUNK - 1)
553 *(*buf + berlen) = '\0';
554 return berlen ? berlen : 1;
559 * In nonblocking mode, you must call again with same buffer while
562 int tcpip_put(COMSTACK h, char *buf, int size)
565 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
567 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
568 if (state->towrite < 0)
570 state->towrite = size;
573 else if (state->towrite != size)
575 h->cerrno = CSWRONGBUF;
578 while (state->towrite > state->written)
580 if ((res = send(h->iofile, buf + state->written, size -
581 state->written, 0)) < 0)
584 if (WSAGetLastError() == WSAEWOULDBLOCK)
589 TRC(fprintf(stderr, " Flow control stop\n"));
595 state->written += res;
596 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
597 res, state->written, size));
599 state->towrite = state->written = -1;
600 TRC(fprintf(stderr, " Ok\n"));
604 int tcpip_close(COMSTACK h)
606 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
608 TRC(fprintf(stderr, "tcpip_close\n"));
611 closesocket(h->iofile);
622 char *tcpip_addrstr(COMSTACK h)
624 struct sockaddr_in addr;
625 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
626 char *r, *buf = sp->buf;
628 struct hostent *host;
631 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
636 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
638 r = (char*) host->h_name;
640 r = inet_ntoa(addr.sin_addr);
641 sprintf(buf, "tcp:%s", r);