2 * Copyright (c) 1995-1997, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.17 1997-09-17 12:10:30 adam
10 * Revision 1.16 1997/09/01 08:49:14 adam
11 * New windows NT/95 port using MSV5.0. Minor changes only.
13 * Revision 1.15 1997/05/14 06:53:33 adam
16 * Revision 1.14 1997/05/01 15:06:32 adam
17 * Moved WINSOCK init. code to tcpip_init routine.
19 * Revision 1.13 1996/11/01 08:45:18 adam
20 * Bug fix: used close on MS-Windows. Fixed to closesocket.
22 * Revision 1.12 1996/07/06 19:58:30 quinn
23 * System headerfiles gathered in yconfig
25 * Revision 1.11 1996/02/23 10:00:39 quinn
28 * Revision 1.10 1996/02/20 12:52:11 quinn
29 * WAIS protocol support.
31 * Revision 1.9 1996/02/10 12:23:11 quinn
32 * Enablie inetd operations fro TCP/IP stack
34 * Revision 1.8 1995/11/01 13:54:27 quinn
37 * Revision 1.7 1995/10/30 12:41:16 quinn
38 * Added hostname lookup for server.
40 * Revision 1.6 1995/09/29 17:12:00 quinn
43 * Revision 1.5 1995/09/29 17:01:48 quinn
46 * Revision 1.4 1995/09/28 10:12:26 quinn
47 * Windows-support changes
49 * Revision 1.3 1995/09/27 15:02:45 quinn
50 * Modified function heads & prototypes.
52 * Revision 1.2 1995/06/15 12:30:06 quinn
53 * Added @ as hostname alias for INADDR ANY.
55 * Revision 1.1 1995/06/14 09:58:20 quinn
56 * Renamed yazlib to comstack.
58 * Revision 1.20 1995/05/16 08:51:16 quinn
59 * License, documentation, and memory fixes
61 * Revision 1.19 1995/04/10 10:24:08 quinn
64 * Revision 1.18 1995/03/30 13:29:27 quinn
65 * Added REUSEADDR in tcpip_bind
67 * Revision 1.17 1995/03/27 08:36:10 quinn
68 * Some work on nonblocking operation in xmosi.c and rfct.c.
69 * Added protocol parameter to cs_create()
71 * Revision 1.16 1995/03/21 15:53:41 quinn
74 * Revision 1.15 1995/03/21 12:31:27 quinn
75 * Added check for EINPROGRESS on connect.
77 * Revision 1.14 1995/03/20 09:47:21 quinn
78 * Added server-side support to xmosi.c
79 * Fixed possible problems in rfct
82 * Revision 1.13 1995/03/15 16:15:13 adam
85 * Revision 1.12 1995/03/15 15:36:27 quinn
86 * Mods to support nonblocking I/O
88 * Revision 1.11 1995/03/15 08:37:57 quinn
89 * Now we're pretty much set for nonblocking I/O.
91 * Revision 1.10 1995/03/14 17:00:07 quinn
92 * Bug-fixes - added tracing info to tcpip.c
94 * Revision 1.9 1995/03/14 10:28:42 quinn
95 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
97 * Revision 1.8 1995/03/10 14:22:50 quinn
98 * Removed debug output.
100 * Revision 1.7 1995/03/10 11:44:59 quinn
101 * Fixes and debugging
103 * Revision 1.6 1995/03/07 10:26:55 quinn
104 * Initialized type field in the comstacks.
106 * Revision 1.5 1995/02/14 20:40:07 quinn
109 * Revision 1.4 1995/02/14 11:54:49 quinn
110 * Beginning to add full CCL.
112 * Revision 1.3 1995/02/10 18:58:10 quinn
113 * Fixed tcpip_get (formerly tcpip_read).
114 * Turned tst (cli) into a proper, event-driven thingy.
116 * Revision 1.2 1995/02/10 15:55:47 quinn
119 * Revision 1.1 1995/02/09 15:51:52 quinn
133 #include <comstack.h>
136 int tcpip_close(COMSTACK h);
137 int tcpip_put(COMSTACK h, char *buf, int size);
138 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
139 int tcpip_connect(COMSTACK h, void *address);
140 int tcpip_more(COMSTACK h);
141 int tcpip_rcvconnect(COMSTACK h);
142 int tcpip_bind(COMSTACK h, void *address, int mode);
143 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
144 COMSTACK tcpip_accept(COMSTACK h);
145 char *tcpip_addrstr(COMSTACK h);
146 void *tcpip_straddr(COMSTACK h, const char *str);
149 * Determine length/completeness of incoming packages
151 int completeBER(unsigned char *buf, int len); /* from the ODR module */
152 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
160 typedef struct tcpip_state
162 char *altbuf; /* alternate buffer for surplus data */
163 int altsize; /* size as xmalloced */
164 int altlen; /* length of data or 0 if none */
166 int written; /* -1 if we aren't writing */
167 int towrite; /* to verify against user input */
168 int (*complete)(unsigned char *buf, int len); /* length/completeness */
169 struct sockaddr_in addr; /* returned by cs_straddr */
170 char buf[128]; /* returned by cs_addrstr */
174 static int tcpip_init (void)
176 static int initialized = 0;
182 requested = MAKEWORD(1, 1);
183 if (WSAStartup(requested, &wd))
190 static int tcpip_init (void)
196 * This function is always called through the cs_create() macro.
197 * s >= 0: socket has already been established for us.
199 COMSTACK tcpip_type(int s, int blocking, int protocol)
205 unsigned long tru = 1;
207 struct protoent *proto;
215 if (!(proto = getprotobyname("tcp")))
217 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
219 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
226 if (!(p = xmalloc(sizeof(struct comstack))))
228 if (!(state = p->cprivate = xmalloc(sizeof(tcpip_state))))
232 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
234 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
239 p->type = tcpip_type;
240 p->protocol = protocol;
242 p->f_connect = tcpip_connect;
243 p->f_rcvconnect = tcpip_rcvconnect;
244 p->f_get = tcpip_get;
245 p->f_put = tcpip_put;
246 p->f_close = tcpip_close;
247 p->f_more = tcpip_more;
248 p->f_bind = tcpip_bind;
249 p->f_listen = tcpip_listen;
250 p->f_accept = tcpip_accept;
251 p->f_addrstr = tcpip_addrstr;
252 p->f_straddr = tcpip_straddr;
254 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
260 state->altsize = state->altlen = 0;
261 state->towrite = state->written = -1;
262 if (protocol == PROTO_WAIS)
263 state->complete = completeWAIS;
265 state->complete = completeBER;
267 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
268 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
273 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
277 short int port = 210;
282 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
283 add->sin_family = AF_INET;
285 if ((p = strchr(buf, ':')))
290 add->sin_port = htons(port);
291 if (!strcmp("@", buf))
292 add->sin_addr.s_addr = INADDR_ANY;
293 else if ((hp = gethostbyname(buf)))
294 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
295 sizeof(struct in_addr));
296 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
297 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
303 void *tcpip_straddr(COMSTACK h, const char *str)
305 tcpip_state *sp = h->cprivate;
307 if (!tcpip_strtoaddr_ex (str, &sp->addr))
312 struct sockaddr_in *tcpip_strtoaddr(const char *str)
314 static struct sockaddr_in add;
316 if (!tcpip_strtoaddr_ex (str, &add))
321 int tcpip_more(COMSTACK h)
323 tcpip_state *sp = h->cprivate;
325 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
330 * connect(2) will block (sometimes) - nothing we can do short of doing
331 * weird things like spawning subprocesses or threading or some weird junk
334 int tcpip_connect(COMSTACK h, void *address)
336 struct sockaddr_in *add = address;
338 TRC(fprintf(stderr, "tcpip_connect\n"));
339 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
342 if (WSAGetLastError() == WSAEWOULDBLOCK)
344 if (errno == EINPROGRESS)
349 h->state = CS_DATAXFER;
356 int tcpip_rcvconnect(COMSTACK h)
358 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
362 int tcpip_bind(COMSTACK h, void *address, int mode)
364 struct sockaddr *addr = address;
365 unsigned long one = 1;
367 TRC(fprintf(stderr, "tcpip_bind\n"));
368 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
373 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
378 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
387 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
389 struct sockaddr_in addr;
390 int len = sizeof(addr);
392 TRC(fprintf(stderr, "tcpip_listen\n"));
393 if (h->state != CS_IDLE)
395 h->cerrno = CSOUTSTATE;
398 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
401 if (WSAGetLastError() == WSAEWOULDBLOCK)
403 if (errno == EWOULDBLOCK)
406 h->cerrno = CSNODATA;
411 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
412 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
419 COMSTACK tcpip_accept(COMSTACK h)
422 tcpip_state *state, *st = h->cprivate;
424 unsigned long tru = 1;
427 TRC(fprintf(stderr, "tcpip_accept\n"));
428 if (h->state != CS_INCON)
430 h->cerrno = CSOUTSTATE;
433 if (!(cnew = xmalloc(sizeof(*cnew))))
438 memcpy(cnew, h, sizeof(*h));
439 cnew->iofile = h->newfd;
440 if (!(state = cnew->cprivate = xmalloc(sizeof(tcpip_state))))
446 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
448 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
452 state->altsize = state->altlen = 0;
453 state->towrite = state->written = -1;
454 state->complete = st->complete;
455 cnew->state = CS_DATAXFER;
460 #define CS_TCPIP_BUFCHUNK 4096
463 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
464 * 0=connection closed.
466 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
468 tcpip_state *sp = h->cprivate;
470 int tmpi, berlen, rest, req, tomove;
471 int hasread = 0, res;
473 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
474 if (sp->altlen) /* switch buffers */
476 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
477 (unsigned) sp->altbuf));
481 *bufsize = sp->altsize;
482 hasread = sp->altlen;
487 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
491 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
494 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
495 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
497 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
499 if (WSAGetLastError() == WSAEWOULDBLOCK)
501 if (errno == EWOULDBLOCK)
509 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
511 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
513 /* move surplus buffer (or everything if we didn't get a BER rec.) */
514 if (hasread > berlen)
516 tomove = req = hasread - berlen;
517 rest = tomove % CS_TCPIP_BUFCHUNK;
519 req += CS_TCPIP_BUFCHUNK - rest;
522 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
524 } else if (sp->altsize < req)
525 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
527 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
528 (unsigned) sp->altbuf));
529 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
531 if (berlen < CS_TCPIP_BUFCHUNK - 1)
532 *(*buf + berlen) = '\0';
533 return berlen ? berlen : 1;
538 * In nonblocking mode, you must call again with same buffer while
541 int tcpip_put(COMSTACK h, char *buf, int size)
544 struct tcpip_state *state = h->cprivate;
546 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
547 if (state->towrite < 0)
549 state->towrite = size;
552 else if (state->towrite != size)
554 h->cerrno = CSWRONGBUF;
557 while (state->towrite > state->written)
559 if ((res = send(h->iofile, buf + state->written, size -
560 state->written, 0)) < 0)
563 if (WSAGetLastError() == WSAEWOULDBLOCK)
568 TRC(fprintf(stderr, " Flow control stop\n"));
574 state->written += res;
575 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
576 res, state->written, size));
578 state->towrite = state->written = -1;
579 TRC(fprintf(stderr, " Ok\n"));
583 int tcpip_close(COMSTACK h)
585 tcpip_state *sp = h->cprivate;
587 TRC(fprintf(stderr, "tcpip_close\n"));
590 closesocket(h->iofile);
601 char *tcpip_addrstr(COMSTACK h)
603 struct sockaddr_in addr;
604 tcpip_state *sp = h->cprivate;
605 char *r, *buf = sp->buf;
607 struct hostent *host;
610 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
615 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
617 r = (char*) host->h_name;
619 r = inet_ntoa(addr.sin_addr);
620 sprintf(buf, "tcp:%s", r);