2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.27 1999-02-02 13:57:31 adam
8 * Uses preprocessor define WIN32 instead of WINDOWS to build code
11 * Revision 1.26 1999/01/08 11:23:14 adam
12 * Added const modifier to some of the BER/ODR encoding routines.
14 * Revision 1.25 1998/07/07 15:49:23 adam
15 * Added braces to avoid warning.
17 * Revision 1.24 1998/06/29 07:59:17 adam
20 * Revision 1.23 1998/06/23 15:37:50 adam
21 * Added type cast to prevent warning.
23 * Revision 1.22 1998/06/22 11:32:36 adam
24 * Added 'conditional cs_listen' feature.
26 * Revision 1.21 1998/05/20 09:55:32 adam
27 * Function tcpip_get treats EINPROGRESS error in the same way as
28 * EWOULDBLOCK. EINPROGRESS shouldn't be returned - but it is on
29 * Solaris in some cases.
31 * Revision 1.20 1998/05/18 10:10:40 adam
32 * Minor change to avoid C++ warning.
34 * Revision 1.19 1998/02/11 11:53:33 adam
35 * Changed code so that it compiles as C++.
37 * Revision 1.18 1997/09/29 07:15:25 adam
38 * Changed use of setsockopt to avoid warnings on MSVC.
40 * Revision 1.17 1997/09/17 12:10:30 adam
43 * Revision 1.16 1997/09/01 08:49:14 adam
44 * New windows NT/95 port using MSV5.0. Minor changes only.
46 * Revision 1.15 1997/05/14 06:53:33 adam
49 * Revision 1.14 1997/05/01 15:06:32 adam
50 * Moved WINSOCK init. code to tcpip_init routine.
52 * Revision 1.13 1996/11/01 08:45:18 adam
53 * Bug fix: used close on MS-Windows. Fixed to closesocket.
55 * Revision 1.12 1996/07/06 19:58:30 quinn
56 * System headerfiles gathered in yconfig
58 * Revision 1.11 1996/02/23 10:00:39 quinn
61 * Revision 1.10 1996/02/20 12:52:11 quinn
62 * WAIS protocol support.
64 * Revision 1.9 1996/02/10 12:23:11 quinn
65 * Enablie inetd operations fro TCP/IP stack
67 * Revision 1.8 1995/11/01 13:54:27 quinn
70 * Revision 1.7 1995/10/30 12:41:16 quinn
71 * Added hostname lookup for server.
73 * Revision 1.6 1995/09/29 17:12:00 quinn
76 * Revision 1.5 1995/09/29 17:01:48 quinn
79 * Revision 1.4 1995/09/28 10:12:26 quinn
80 * Windows-support changes
82 * Revision 1.3 1995/09/27 15:02:45 quinn
83 * Modified function heads & prototypes.
85 * Revision 1.2 1995/06/15 12:30:06 quinn
86 * Added @ as hostname alias for INADDR ANY.
88 * Revision 1.1 1995/06/14 09:58:20 quinn
89 * Renamed yazlib to comstack.
91 * Revision 1.20 1995/05/16 08:51:16 quinn
92 * License, documentation, and memory fixes
94 * Revision 1.19 1995/04/10 10:24:08 quinn
97 * Revision 1.18 1995/03/30 13:29:27 quinn
98 * Added REUSEADDR in tcpip_bind
100 * Revision 1.17 1995/03/27 08:36:10 quinn
101 * Some work on nonblocking operation in xmosi.c and rfct.c.
102 * Added protocol parameter to cs_create()
104 * Revision 1.16 1995/03/21 15:53:41 quinn
107 * Revision 1.15 1995/03/21 12:31:27 quinn
108 * Added check for EINPROGRESS on connect.
110 * Revision 1.14 1995/03/20 09:47:21 quinn
111 * Added server-side support to xmosi.c
112 * Fixed possible problems in rfct
115 * Revision 1.13 1995/03/15 16:15:13 adam
118 * Revision 1.12 1995/03/15 15:36:27 quinn
119 * Mods to support nonblocking I/O
121 * Revision 1.11 1995/03/15 08:37:57 quinn
122 * Now we're pretty much set for nonblocking I/O.
124 * Revision 1.10 1995/03/14 17:00:07 quinn
125 * Bug-fixes - added tracing info to tcpip.c
127 * Revision 1.9 1995/03/14 10:28:42 quinn
128 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
130 * Revision 1.8 1995/03/10 14:22:50 quinn
131 * Removed debug output.
133 * Revision 1.7 1995/03/10 11:44:59 quinn
134 * Fixes and debugging
136 * Revision 1.6 1995/03/07 10:26:55 quinn
137 * Initialized type field in the comstacks.
139 * Revision 1.5 1995/02/14 20:40:07 quinn
142 * Revision 1.4 1995/02/14 11:54:49 quinn
143 * Beginning to add full CCL.
145 * Revision 1.3 1995/02/10 18:58:10 quinn
146 * Fixed tcpip_get (formerly tcpip_read).
147 * Turned tst (cli) into a proper, event-driven thingy.
149 * Revision 1.2 1995/02/10 15:55:47 quinn
152 * Revision 1.1 1995/02/09 15:51:52 quinn
166 #include <comstack.h>
169 /* Chas added the following, so we get the definition of completeBER */
172 int tcpip_close(COMSTACK h);
173 int tcpip_put(COMSTACK h, char *buf, int size);
174 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
175 int tcpip_connect(COMSTACK h, void *address);
176 int tcpip_more(COMSTACK h);
177 int tcpip_rcvconnect(COMSTACK h);
178 int tcpip_bind(COMSTACK h, void *address, int mode);
179 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
180 int (*check_ip)(void *cd, const char *a, int len, int type),
183 COMSTACK tcpip_accept(COMSTACK h);
184 char *tcpip_addrstr(COMSTACK h);
185 void *tcpip_straddr(COMSTACK h, const char *str);
194 typedef struct tcpip_state
196 char *altbuf; /* alternate buffer for surplus data */
197 int altsize; /* size as xmalloced */
198 int altlen; /* length of data or 0 if none */
200 int written; /* -1 if we aren't writing */
201 int towrite; /* to verify against user input */
202 int (*complete)(const unsigned char *buf, int len); /* length/comple. */
203 struct sockaddr_in addr; /* returned by cs_straddr */
204 char buf[128]; /* returned by cs_addrstr */
208 static int tcpip_init (void)
210 static int initialized = 0;
216 requested = MAKEWORD(1, 1);
217 if (WSAStartup(requested, &wd))
224 static int tcpip_init (void)
230 * This function is always called through the cs_create() macro.
231 * s >= 0: socket has already been established for us.
233 COMSTACK tcpip_type(int s, int blocking, int protocol)
239 unsigned long tru = 1;
241 struct protoent *proto;
249 if (!(proto = getprotobyname("tcp")))
251 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
253 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
260 if (!(p = (struct comstack *)xmalloc(sizeof(struct comstack))))
262 if (!(state = (struct tcpip_state *)(p->cprivate =
263 xmalloc(sizeof(tcpip_state)))))
267 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
269 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
274 p->type = tcpip_type;
275 p->protocol = (enum oid_proto) protocol;
277 p->f_connect = tcpip_connect;
278 p->f_rcvconnect = tcpip_rcvconnect;
279 p->f_get = tcpip_get;
280 p->f_put = tcpip_put;
281 p->f_close = tcpip_close;
282 p->f_more = tcpip_more;
283 p->f_bind = tcpip_bind;
284 p->f_listen = tcpip_listen;
285 p->f_accept = tcpip_accept;
286 p->f_addrstr = tcpip_addrstr;
287 p->f_straddr = tcpip_straddr;
289 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
295 state->altsize = state->altlen = 0;
296 state->towrite = state->written = -1;
297 if (protocol == PROTO_WAIS)
298 state->complete = completeWAIS;
300 state->complete = completeBER;
302 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
303 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
308 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
312 short int port = 210;
317 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
318 add->sin_family = AF_INET;
320 if ((p = strchr(buf, ':')))
325 add->sin_port = htons(port);
326 if (!strcmp("@", buf))
327 add->sin_addr.s_addr = INADDR_ANY;
328 else if ((hp = gethostbyname(buf)))
329 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
330 sizeof(struct in_addr));
331 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
332 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
338 void *tcpip_straddr(COMSTACK h, const char *str)
340 tcpip_state *sp = (tcpip_state *)h->cprivate;
342 if (!tcpip_strtoaddr_ex (str, &sp->addr))
347 struct sockaddr_in *tcpip_strtoaddr(const char *str)
349 static struct sockaddr_in add;
351 if (!tcpip_strtoaddr_ex (str, &add))
356 int tcpip_more(COMSTACK h)
358 tcpip_state *sp = (tcpip_state *)h->cprivate;
360 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
365 * connect(2) will block (sometimes) - nothing we can do short of doing
366 * weird things like spawning subprocesses or threading or some weird junk
369 int tcpip_connect(COMSTACK h, void *address)
371 struct sockaddr_in *add = (struct sockaddr_in *)address;
373 TRC(fprintf(stderr, "tcpip_connect\n"));
374 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
377 if (WSAGetLastError() == WSAEWOULDBLOCK)
379 if (errno == EINPROGRESS)
384 h->state = CS_DATAXFER;
391 int tcpip_rcvconnect(COMSTACK h)
393 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
397 int tcpip_bind(COMSTACK h, void *address, int mode)
399 struct sockaddr *addr = (struct sockaddr *)address;
403 unsigned long one = 1;
406 TRC(fprintf(stderr, "tcpip_bind\n"));
407 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (char*)
408 &one, sizeof(one)) < 0)
413 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
418 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
428 void tcpip_get_ip(COMSTACK h, char *ip_buf)
430 struct tcpip_state *sp = (tcpip_state *)h->cprivate;
431 const char *ip_addr = (const char *) (&sp->addr->sin_addr.s_addr);
434 for (i = 0; i<4; i++)
435 TRC (fprintf (stderr, "%u ", ip_addr[i]));
436 TRC (fprintf (stderr, "\n"));
440 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen,
441 int (*check_ip)(void *cd, const char *a, int len, int type),
444 struct sockaddr_in addr;
445 int len = sizeof(addr);
447 TRC(fprintf(stderr, "tcpip_listen pid=%d\n", getpid()));
448 if (h->state != CS_IDLE)
450 h->cerrno = CSOUTSTATE;
453 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
456 if (WSAGetLastError() == WSAEWOULDBLOCK)
458 if (errno == EWOULDBLOCK)
461 h->cerrno = CSNODATA;
466 if (addrlen && *addrlen >= sizeof(struct sockaddr_in))
467 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
470 if (check_ip && (*check_ip)(cd, (const char *) &addr.sin_addr,
471 sizeof(addr.sin_addr), AF_INET))
475 closesocket(h->iofile);
485 COMSTACK tcpip_accept(COMSTACK h)
488 tcpip_state *state, *st = (tcpip_state *)h->cprivate;
490 unsigned long tru = 1;
493 TRC(fprintf(stderr, "tcpip_accept\n"));
494 if (h->state != CS_INCON)
496 h->cerrno = CSOUTSTATE;
499 if (!(cnew = (COMSTACK)xmalloc(sizeof(*cnew))))
504 memcpy(cnew, h, sizeof(*h));
505 cnew->iofile = h->newfd;
506 if (!(state = (tcpip_state *)(cnew->cprivate = xmalloc(sizeof(tcpip_state)))))
512 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
514 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
518 state->altsize = state->altlen = 0;
519 state->towrite = state->written = -1;
520 state->complete = st->complete;
521 cnew->state = CS_DATAXFER;
526 #define CS_TCPIP_BUFCHUNK 4096
529 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
530 * 0=connection closed.
532 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
534 tcpip_state *sp = (tcpip_state *)h->cprivate;
536 int tmpi, berlen, rest, req, tomove;
537 int hasread = 0, res;
539 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
540 if (sp->altlen) /* switch buffers */
542 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
543 (unsigned) sp->altbuf));
547 *bufsize = sp->altsize;
548 hasread = sp->altlen;
553 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
557 if (!(*buf = (char *)xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
560 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
561 if (!(*buf =(char *)xrealloc(*buf, *bufsize *= 2)))
563 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
566 if (WSAGetLastError() == WSAEWOULDBLOCK)
569 if (errno == EINPROGRESS || errno == EWOULDBLOCK)
571 if (errno == EWOULDBLOCK)
581 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
583 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
585 /* move surplus buffer (or everything if we didn't get a BER rec.) */
586 if (hasread > berlen)
588 tomove = req = hasread - berlen;
589 rest = tomove % CS_TCPIP_BUFCHUNK;
591 req += CS_TCPIP_BUFCHUNK - rest;
594 if (!(sp->altbuf = (char *)xmalloc(sp->altsize = req)))
596 } else if (sp->altsize < req)
597 if (!(sp->altbuf =(char *)xrealloc(sp->altbuf, sp->altsize = req)))
599 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
600 (unsigned) sp->altbuf));
601 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
603 if (berlen < CS_TCPIP_BUFCHUNK - 1)
604 *(*buf + berlen) = '\0';
605 return berlen ? berlen : 1;
610 * In nonblocking mode, you must call again with same buffer while
613 int tcpip_put(COMSTACK h, char *buf, int size)
616 struct tcpip_state *state = (struct tcpip_state *)h->cprivate;
618 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
619 if (state->towrite < 0)
621 state->towrite = size;
624 else if (state->towrite != size)
626 h->cerrno = CSWRONGBUF;
629 while (state->towrite > state->written)
631 if ((res = send(h->iofile, buf + state->written, size -
632 state->written, 0)) < 0)
635 if (WSAGetLastError() == WSAEWOULDBLOCK)
640 TRC(fprintf(stderr, " Flow control stop\n"));
646 state->written += res;
647 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
648 res, state->written, size));
650 state->towrite = state->written = -1;
651 TRC(fprintf(stderr, " Ok\n"));
655 int tcpip_close(COMSTACK h)
657 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
659 TRC(fprintf(stderr, "tcpip_close\n"));
662 closesocket(h->iofile);
673 char *tcpip_addrstr(COMSTACK h)
675 struct sockaddr_in addr;
676 tcpip_state *sp = (struct tcpip_state *)h->cprivate;
677 char *r, *buf = sp->buf;
679 struct hostent *host;
682 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
687 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
689 r = (char*) host->h_name;
691 r = inet_ntoa(addr.sin_addr);
692 sprintf(buf, "tcp:%s", r);