2 * Copyright (c) 1995-1997, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.19 1998-02-11 11:53:33 adam
8 * Changed code so that it compiles as C++.
10 * Revision 1.18 1997/09/29 07:15:25 adam
11 * Changed use of setsockopt to avoid warnings on MSVC.
13 * Revision 1.17 1997/09/17 12:10:30 adam
16 * Revision 1.16 1997/09/01 08:49:14 adam
17 * New windows NT/95 port using MSV5.0. Minor changes only.
19 * Revision 1.15 1997/05/14 06:53:33 adam
22 * Revision 1.14 1997/05/01 15:06:32 adam
23 * Moved WINSOCK init. code to tcpip_init routine.
25 * Revision 1.13 1996/11/01 08:45:18 adam
26 * Bug fix: used close on MS-Windows. Fixed to closesocket.
28 * Revision 1.12 1996/07/06 19:58:30 quinn
29 * System headerfiles gathered in yconfig
31 * Revision 1.11 1996/02/23 10:00:39 quinn
34 * Revision 1.10 1996/02/20 12:52:11 quinn
35 * WAIS protocol support.
37 * Revision 1.9 1996/02/10 12:23:11 quinn
38 * Enablie inetd operations fro TCP/IP stack
40 * Revision 1.8 1995/11/01 13:54:27 quinn
43 * Revision 1.7 1995/10/30 12:41:16 quinn
44 * Added hostname lookup for server.
46 * Revision 1.6 1995/09/29 17:12:00 quinn
49 * Revision 1.5 1995/09/29 17:01:48 quinn
52 * Revision 1.4 1995/09/28 10:12:26 quinn
53 * Windows-support changes
55 * Revision 1.3 1995/09/27 15:02:45 quinn
56 * Modified function heads & prototypes.
58 * Revision 1.2 1995/06/15 12:30:06 quinn
59 * Added @ as hostname alias for INADDR ANY.
61 * Revision 1.1 1995/06/14 09:58:20 quinn
62 * Renamed yazlib to comstack.
64 * Revision 1.20 1995/05/16 08:51:16 quinn
65 * License, documentation, and memory fixes
67 * Revision 1.19 1995/04/10 10:24:08 quinn
70 * Revision 1.18 1995/03/30 13:29:27 quinn
71 * Added REUSEADDR in tcpip_bind
73 * Revision 1.17 1995/03/27 08:36:10 quinn
74 * Some work on nonblocking operation in xmosi.c and rfct.c.
75 * Added protocol parameter to cs_create()
77 * Revision 1.16 1995/03/21 15:53:41 quinn
80 * Revision 1.15 1995/03/21 12:31:27 quinn
81 * Added check for EINPROGRESS on connect.
83 * Revision 1.14 1995/03/20 09:47:21 quinn
84 * Added server-side support to xmosi.c
85 * Fixed possible problems in rfct
88 * Revision 1.13 1995/03/15 16:15:13 adam
91 * Revision 1.12 1995/03/15 15:36:27 quinn
92 * Mods to support nonblocking I/O
94 * Revision 1.11 1995/03/15 08:37:57 quinn
95 * Now we're pretty much set for nonblocking I/O.
97 * Revision 1.10 1995/03/14 17:00:07 quinn
98 * Bug-fixes - added tracing info to tcpip.c
100 * Revision 1.9 1995/03/14 10:28:42 quinn
101 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
103 * Revision 1.8 1995/03/10 14:22:50 quinn
104 * Removed debug output.
106 * Revision 1.7 1995/03/10 11:44:59 quinn
107 * Fixes and debugging
109 * Revision 1.6 1995/03/07 10:26:55 quinn
110 * Initialized type field in the comstacks.
112 * Revision 1.5 1995/02/14 20:40:07 quinn
115 * Revision 1.4 1995/02/14 11:54:49 quinn
116 * Beginning to add full CCL.
118 * Revision 1.3 1995/02/10 18:58:10 quinn
119 * Fixed tcpip_get (formerly tcpip_read).
120 * Turned tst (cli) into a proper, event-driven thingy.
122 * Revision 1.2 1995/02/10 15:55:47 quinn
125 * Revision 1.1 1995/02/09 15:51:52 quinn
139 #include <comstack.h>
142 /* Chas added the following 2, so we get the definition of completeBER */
146 int tcpip_close(COMSTACK h);
147 int tcpip_put(COMSTACK h, char *buf, int size);
148 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
149 int tcpip_connect(COMSTACK h, void *address);
150 int tcpip_more(COMSTACK h);
151 int tcpip_rcvconnect(COMSTACK h);
152 int tcpip_bind(COMSTACK h, void *address, int mode);
153 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
154 COMSTACK tcpip_accept(COMSTACK h);
155 char *tcpip_addrstr(COMSTACK h);
156 void *tcpip_straddr(COMSTACK h, const char *str);
159 * Determine length/completeness of incoming packages
161 /* Chas: Removed the definition of completeBERfrom here, use the one in the */
162 /* include directory as that as the extern "C" around it */
163 /*int completeBER(unsigned char *buf, int len); */ /* from the ODR module */
164 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
172 typedef struct tcpip_state
174 char *altbuf; /* alternate buffer for surplus data */
175 int altsize; /* size as xmalloced */
176 int altlen; /* length of data or 0 if none */
178 int written; /* -1 if we aren't writing */
179 int towrite; /* to verify against user input */
180 int (*complete)(unsigned char *buf, int len); /* length/completeness */
181 struct sockaddr_in addr; /* returned by cs_straddr */
182 char buf[128]; /* returned by cs_addrstr */
186 static int tcpip_init (void)
188 static int initialized = 0;
194 requested = MAKEWORD(1, 1);
195 if (WSAStartup(requested, &wd))
202 static int tcpip_init (void)
208 * This function is always called through the cs_create() macro.
209 * s >= 0: socket has already been established for us.
211 COMSTACK tcpip_type(int s, int blocking, int protocol)
217 unsigned long tru = 1;
219 struct protoent *proto;
227 if (!(proto = getprotobyname("tcp")))
229 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
231 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
238 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
240 if (!(state = (struct tcpip_state *)(p->cprivate =
241 xmalloc(sizeof(tcpip_state)))))
245 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
247 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
252 p->type = tcpip_type;
253 p->protocol = protocol;
255 p->f_connect = tcpip_connect;
256 p->f_rcvconnect = tcpip_rcvconnect;
257 p->f_get = tcpip_get;
258 p->f_put = tcpip_put;
259 p->f_close = tcpip_close;
260 p->f_more = tcpip_more;
261 p->f_bind = tcpip_bind;
262 p->f_listen = tcpip_listen;
263 p->f_accept = tcpip_accept;
264 p->f_addrstr = tcpip_addrstr;
265 p->f_straddr = tcpip_straddr;
267 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
273 state->altsize = state->altlen = 0;
274 state->towrite = state->written = -1;
275 if (protocol == PROTO_WAIS)
276 state->complete = completeWAIS;
278 state->complete = completeBER;
280 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
281 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
286 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
290 short int port = 210;
295 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
296 add->sin_family = AF_INET;
298 if ((p = strchr(buf, ':')))
303 add->sin_port = htons(port);
304 if (!strcmp("@", buf))
305 add->sin_addr.s_addr = INADDR_ANY;
306 else if ((hp = gethostbyname(buf)))
307 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
308 sizeof(struct in_addr));
309 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
310 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
316 void *tcpip_straddr(COMSTACK h, const char *str)
318 tcpip_state *sp = (tcpip_state *)h->cprivate;
320 if (!tcpip_strtoaddr_ex (str, &sp->addr))
325 struct sockaddr_in *tcpip_strtoaddr(const char *str)
327 static struct sockaddr_in add;
329 if (!tcpip_strtoaddr_ex (str, &add))
334 int tcpip_more(COMSTACK h)
336 tcpip_state *sp = (tcpip_state *)h->cprivate;
338 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
343 * connect(2) will block (sometimes) - nothing we can do short of doing
344 * weird things like spawning subprocesses or threading or some weird junk
347 int tcpip_connect(COMSTACK h, void *address)
349 struct sockaddr_in *add = (struct sockaddr_in *)address;
351 TRC(fprintf(stderr, "tcpip_connect\n"));
352 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
355 if (WSAGetLastError() == WSAEWOULDBLOCK)
357 if (errno == EINPROGRESS)
362 h->state = CS_DATAXFER;
369 int tcpip_rcvconnect(COMSTACK h)
371 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
375 int tcpip_bind(COMSTACK h, void *address, int mode)
377 struct sockaddr *addr = (struct sockaddr *)address;
381 unsigned long one = 1;
384 TRC(fprintf(stderr, "tcpip_bind\n"));
385 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
386 &one, sizeof(one)) < 0)
391 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
396 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
405 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
407 struct sockaddr_in addr;
408 int len = sizeof(addr);
410 TRC(fprintf(stderr, "tcpip_listen\n"));
411 if (h->state != CS_IDLE)
413 h->cerrno = CSOUTSTATE;
416 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
419 if (WSAGetLastError() == WSAEWOULDBLOCK)
421 if (errno == EWOULDBLOCK)
424 h->cerrno = CSNODATA;
429 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
430 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
437 COMSTACK tcpip_accept(COMSTACK h)
440 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
442 unsigned long tru = 1;
445 TRC(fprintf(stderr, "tcpip_accept\n"));
446 if (h->state != CS_INCON)
448 h->cerrno = CSOUTSTATE;
451 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
456 memcpy(cnew, h, sizeof(*h));
457 cnew->iofile = h->newfd;
458 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
464 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
466 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
470 state->altsize = state->altlen = 0;
471 state->towrite = state->written = -1;
472 state->complete = st->complete;
473 cnew->state = CS_DATAXFER;
478 #define CS_TCPIP_BUFCHUNK 4096
481 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
482 * 0=connection closed.
484 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
486 tcpip_state *sp = (tcpip_state *)h->cprivate;
488 int tmpi, berlen, rest, req, tomove;
489 int hasread = 0, res;
491 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
492 if (sp->altlen) /* switch buffers */
494 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
495 (unsigned) sp->altbuf));
499 *bufsize = sp->altsize;
500 hasread = sp->altlen;
505 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
509 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
512 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
513 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
515 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
517 if (WSAGetLastError() == WSAEWOULDBLOCK)
519 if (errno == EWOULDBLOCK)
527 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
529 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
531 /* move surplus buffer (or everything if we didn't get a BER rec.) */
532 if (hasread > berlen)
534 tomove = req = hasread - berlen;
535 rest = tomove % CS_TCPIP_BUFCHUNK;
537 req += CS_TCPIP_BUFCHUNK - rest;
540 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
542 } else if (sp->altsize < req)
543 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
545 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
546 (unsigned) sp->altbuf));
547 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
549 if (berlen < CS_TCPIP_BUFCHUNK - 1)
550 *(*buf + berlen) = '\0';
551 return berlen ? berlen : 1;
556 * In nonblocking mode, you must call again with same buffer while
559 int tcpip_put(COMSTACK h, char *buf, int size)
562 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
564 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
565 if (state->towrite < 0)
567 state->towrite = size;
570 else if (state->towrite != size)
572 h->cerrno = CSWRONGBUF;
575 while (state->towrite > state->written)
577 if ((res = send(h->iofile, buf + state->written, size -
578 state->written, 0)) < 0)
581 if (WSAGetLastError() == WSAEWOULDBLOCK)
586 TRC(fprintf(stderr, " Flow control stop\n"));
592 state->written += res;
593 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
594 res, state->written, size));
596 state->towrite = state->written = -1;
597 TRC(fprintf(stderr, " Ok\n"));
601 int tcpip_close(COMSTACK h)
603 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
605 TRC(fprintf(stderr, "tcpip_close\n"));
608 closesocket(h->iofile);
619 char *tcpip_addrstr(COMSTACK h)
621 struct sockaddr_in addr;
622 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
623 char *r, *buf = sp->buf;
625 struct hostent *host;
628 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
633 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
635 r = (char*) host->h_name;
637 r = inet_ntoa(addr.sin_addr);
638 sprintf(buf, "tcp:%s", r);