2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.16 1997-09-01 08:49:14 adam
8 * New windows NT/95 port using MSV5.0. Minor changes only.
10 * Revision 1.15 1997/05/14 06:53:33 adam
13 * Revision 1.14 1997/05/01 15:06:32 adam
14 * Moved WINSOCK init. code to tcpip_init routine.
16 * Revision 1.13 1996/11/01 08:45:18 adam
17 * Bug fix: used close on MS-Windows. Fixed to closesocket.
19 * Revision 1.12 1996/07/06 19:58:30 quinn
20 * System headerfiles gathered in yconfig
22 * Revision 1.11 1996/02/23 10:00:39 quinn
25 * Revision 1.10 1996/02/20 12:52:11 quinn
26 * WAIS protocol support.
28 * Revision 1.9 1996/02/10 12:23:11 quinn
29 * Enablie inetd operations fro TCP/IP stack
31 * Revision 1.8 1995/11/01 13:54:27 quinn
34 * Revision 1.7 1995/10/30 12:41:16 quinn
35 * Added hostname lookup for server.
37 * Revision 1.6 1995/09/29 17:12:00 quinn
40 * Revision 1.5 1995/09/29 17:01:48 quinn
43 * Revision 1.4 1995/09/28 10:12:26 quinn
44 * Windows-support changes
46 * Revision 1.3 1995/09/27 15:02:45 quinn
47 * Modified function heads & prototypes.
49 * Revision 1.2 1995/06/15 12:30:06 quinn
50 * Added @ as hostname alias for INADDR ANY.
52 * Revision 1.1 1995/06/14 09:58:20 quinn
53 * Renamed yazlib to comstack.
55 * Revision 1.20 1995/05/16 08:51:16 quinn
56 * License, documentation, and memory fixes
58 * Revision 1.19 1995/04/10 10:24:08 quinn
61 * Revision 1.18 1995/03/30 13:29:27 quinn
62 * Added REUSEADDR in tcpip_bind
64 * Revision 1.17 1995/03/27 08:36:10 quinn
65 * Some work on nonblocking operation in xmosi.c and rfct.c.
66 * Added protocol parameter to cs_create()
68 * Revision 1.16 1995/03/21 15:53:41 quinn
71 * Revision 1.15 1995/03/21 12:31:27 quinn
72 * Added check for EINPROGRESS on connect.
74 * Revision 1.14 1995/03/20 09:47:21 quinn
75 * Added server-side support to xmosi.c
76 * Fixed possible problems in rfct
79 * Revision 1.13 1995/03/15 16:15:13 adam
82 * Revision 1.12 1995/03/15 15:36:27 quinn
83 * Mods to support nonblocking I/O
85 * Revision 1.11 1995/03/15 08:37:57 quinn
86 * Now we're pretty much set for nonblocking I/O.
88 * Revision 1.10 1995/03/14 17:00:07 quinn
89 * Bug-fixes - added tracing info to tcpip.c
91 * Revision 1.9 1995/03/14 10:28:42 quinn
92 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
94 * Revision 1.8 1995/03/10 14:22:50 quinn
95 * Removed debug output.
97 * Revision 1.7 1995/03/10 11:44:59 quinn
100 * Revision 1.6 1995/03/07 10:26:55 quinn
101 * Initialized type field in the comstacks.
103 * Revision 1.5 1995/02/14 20:40:07 quinn
106 * Revision 1.4 1995/02/14 11:54:49 quinn
107 * Beginning to add full CCL.
109 * Revision 1.3 1995/02/10 18:58:10 quinn
110 * Fixed tcpip_get (formerly tcpip_read).
111 * Turned tst (cli) into a proper, event-driven thingy.
113 * Revision 1.2 1995/02/10 15:55:47 quinn
116 * Revision 1.1 1995/02/09 15:51:52 quinn
130 #include <comstack.h>
133 int tcpip_close(COMSTACK h);
134 int tcpip_put(COMSTACK h, char *buf, int size);
135 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
136 int tcpip_connect(COMSTACK h, void *address);
137 int tcpip_more(COMSTACK h);
138 int tcpip_rcvconnect(COMSTACK h);
139 int tcpip_bind(COMSTACK h, void *address, int mode);
140 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
141 COMSTACK tcpip_accept(COMSTACK h);
142 char *tcpip_addrstr(COMSTACK h);
145 * Determine length/completeness of incoming packages
147 int completeBER(unsigned char *buf, int len); /* from the ODR module */
148 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
156 typedef struct tcpip_state
158 char *altbuf; /* alternate buffer for surplus data */
159 int altsize; /* size as xmalloced */
160 int altlen; /* length of data or 0 if none */
162 int written; /* -1 if we aren't writing */
163 int towrite; /* to verify against user input */
164 int (*complete)(unsigned char *buf, int len); /* length/completeness */
168 static int tcpip_init (void)
170 static int initialized = 0;
176 requested = MAKEWORD(1, 1);
177 if (WSAStartup(requested, &wd))
184 static int tcpip_init (void)
190 * This function is always called through the cs_create() macro.
191 * s >= 0: socket has already been established for us.
193 COMSTACK tcpip_type(int s, int blocking, int protocol)
199 unsigned long tru = 1;
201 struct protoent *proto;
209 if (!(proto = getprotobyname("tcp")))
211 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
213 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
220 if (!(p = xmalloc(sizeof(struct comstack))))
222 if (!(state = p->cprivate = xmalloc(sizeof(tcpip_state))))
226 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
228 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
233 p->type = tcpip_type;
234 p->protocol = protocol;
236 p->f_connect = tcpip_connect;
237 p->f_rcvconnect = tcpip_rcvconnect;
238 p->f_get = tcpip_get;
239 p->f_put = tcpip_put;
240 p->f_close = tcpip_close;
241 p->f_more = tcpip_more;
242 p->f_bind = tcpip_bind;
243 p->f_listen = tcpip_listen;
244 p->f_accept = tcpip_accept;
245 p->f_addrstr = tcpip_addrstr;
247 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
253 state->altsize = state->altlen = 0;
254 state->towrite = state->written = -1;
255 if (protocol == PROTO_WAIS)
256 state->complete = completeWAIS;
258 state->complete = completeBER;
260 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
261 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
266 struct sockaddr_in *tcpip_strtoaddr(const char *str)
268 static struct sockaddr_in add;
271 short int port = 210;
276 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
277 add.sin_family = AF_INET;
279 if ((p = strchr(buf, ':')))
284 add.sin_port = htons(port);
285 if (!strcmp("@", buf))
286 add.sin_addr.s_addr = INADDR_ANY;
287 else if ((hp = gethostbyname(buf)))
288 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
289 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
290 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
296 int tcpip_more(COMSTACK h)
298 tcpip_state *sp = h->cprivate;
300 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
305 * connect(2) will block (sometimes) - nothing we can do short of doing
306 * weird things like spawning subprocesses or threading or some weird junk
309 int tcpip_connect(COMSTACK h, void *address)
311 struct sockaddr_in *add = address;
313 TRC(fprintf(stderr, "tcpip_connect\n"));
314 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
317 if (WSAGetLastError() == WSAEWOULDBLOCK)
319 if (errno == EINPROGRESS)
324 h->state = CS_DATAXFER;
331 int tcpip_rcvconnect(COMSTACK h)
333 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
337 int tcpip_bind(COMSTACK h, void *address, int mode)
339 struct sockaddr *addr = address;
340 unsigned long one = 1;
342 TRC(fprintf(stderr, "tcpip_bind\n"));
343 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
348 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
353 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
362 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
364 struct sockaddr_in addr;
365 int len = sizeof(addr);
367 TRC(fprintf(stderr, "tcpip_listen\n"));
368 if (h->state != CS_IDLE)
370 h->cerrno = CSOUTSTATE;
373 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
376 if (WSAGetLastError() == WSAEWOULDBLOCK)
378 if (errno == EWOULDBLOCK)
381 h->cerrno = CSNODATA;
386 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
387 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
394 COMSTACK tcpip_accept(COMSTACK h)
397 tcpip_state *state, *st = h->cprivate;
399 unsigned long tru = 1;
402 TRC(fprintf(stderr, "tcpip_accept\n"));
403 if (h->state != CS_INCON)
405 h->cerrno = CSOUTSTATE;
408 if (!(cnew = xmalloc(sizeof(*cnew))))
413 memcpy(cnew, h, sizeof(*h));
414 cnew->iofile = h->newfd;
415 if (!(state = cnew->cprivate = xmalloc(sizeof(tcpip_state))))
421 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
423 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
427 state->altsize = state->altlen = 0;
428 state->towrite = state->written = -1;
429 state->complete = st->complete;
430 cnew->state = CS_DATAXFER;
435 #define CS_TCPIP_BUFCHUNK 4096
438 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
439 * 0=connection closed.
441 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
443 tcpip_state *sp = h->cprivate;
445 int tmpi, berlen, rest, req, tomove;
446 int hasread = 0, res;
448 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
449 if (sp->altlen) /* switch buffers */
451 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
452 (unsigned) sp->altbuf));
456 *bufsize = sp->altsize;
457 hasread = sp->altlen;
462 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
466 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
469 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
470 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
472 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
474 if (WSAGetLastError() == WSAEWOULDBLOCK)
476 if (errno == EWOULDBLOCK)
484 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
486 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
488 /* move surplus buffer (or everything if we didn't get a BER rec.) */
489 if (hasread > berlen)
491 tomove = req = hasread - berlen;
492 rest = tomove % CS_TCPIP_BUFCHUNK;
494 req += CS_TCPIP_BUFCHUNK - rest;
497 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
499 } else if (sp->altsize < req)
500 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
502 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
503 (unsigned) sp->altbuf));
504 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
506 if (berlen < CS_TCPIP_BUFCHUNK - 1)
507 *(*buf + berlen) = '\0';
508 return berlen ? berlen : 1;
513 * In nonblocking mode, you must call again with same buffer while
516 int tcpip_put(COMSTACK h, char *buf, int size)
519 struct tcpip_state *state = h->cprivate;
521 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
522 if (state->towrite < 0)
524 state->towrite = size;
527 else if (state->towrite != size)
529 h->cerrno = CSWRONGBUF;
532 while (state->towrite > state->written)
534 if ((res = send(h->iofile, buf + state->written, size -
535 state->written, 0)) < 0)
538 if (WSAGetLastError() == WSAEWOULDBLOCK)
543 TRC(fprintf(stderr, " Flow control stop\n"));
549 state->written += res;
550 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
551 res, state->written, size));
553 state->towrite = state->written = -1;
554 TRC(fprintf(stderr, " Ok\n"));
558 int tcpip_close(COMSTACK h)
560 tcpip_state *sp = h->cprivate;
562 TRC(fprintf(stderr, "tcpip_close\n"));
565 closesocket(h->iofile);
576 char *tcpip_addrstr(COMSTACK h)
578 struct sockaddr_in addr;
582 struct hostent *host;
585 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
590 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
592 r = (char*) host->h_name;
594 r = inet_ntoa(addr.sin_addr);
595 sprintf(buf, "tcp:%s", r);