2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.11 1996-02-23 10:00:39 quinn
10 * Revision 1.10 1996/02/20 12:52:11 quinn
11 * WAIS protocol support.
13 * Revision 1.9 1996/02/10 12:23:11 quinn
14 * Enablie inetd operations fro TCP/IP stack
16 * Revision 1.8 1995/11/01 13:54:27 quinn
19 * Revision 1.7 1995/10/30 12:41:16 quinn
20 * Added hostname lookup for server.
22 * Revision 1.6 1995/09/29 17:12:00 quinn
25 * Revision 1.5 1995/09/29 17:01:48 quinn
28 * Revision 1.4 1995/09/28 10:12:26 quinn
29 * Windows-support changes
31 * Revision 1.3 1995/09/27 15:02:45 quinn
32 * Modified function heads & prototypes.
34 * Revision 1.2 1995/06/15 12:30:06 quinn
35 * Added @ as hostname alias for INADDR ANY.
37 * Revision 1.1 1995/06/14 09:58:20 quinn
38 * Renamed yazlib to comstack.
40 * Revision 1.20 1995/05/16 08:51:16 quinn
41 * License, documentation, and memory fixes
43 * Revision 1.19 1995/04/10 10:24:08 quinn
46 * Revision 1.18 1995/03/30 13:29:27 quinn
47 * Added REUSEADDR in tcpip_bind
49 * Revision 1.17 1995/03/27 08:36:10 quinn
50 * Some work on nonblocking operation in xmosi.c and rfct.c.
51 * Added protocol parameter to cs_create()
53 * Revision 1.16 1995/03/21 15:53:41 quinn
56 * Revision 1.15 1995/03/21 12:31:27 quinn
57 * Added check for EINPROGRESS on connect.
59 * Revision 1.14 1995/03/20 09:47:21 quinn
60 * Added server-side support to xmosi.c
61 * Fixed possible problems in rfct
64 * Revision 1.13 1995/03/15 16:15:13 adam
67 * Revision 1.12 1995/03/15 15:36:27 quinn
68 * Mods to support nonblocking I/O
70 * Revision 1.11 1995/03/15 08:37:57 quinn
71 * Now we're pretty much set for nonblocking I/O.
73 * Revision 1.10 1995/03/14 17:00:07 quinn
74 * Bug-fixes - added tracing info to tcpip.c
76 * Revision 1.9 1995/03/14 10:28:42 quinn
77 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
79 * Revision 1.8 1995/03/10 14:22:50 quinn
80 * Removed debug output.
82 * Revision 1.7 1995/03/10 11:44:59 quinn
85 * Revision 1.6 1995/03/07 10:26:55 quinn
86 * Initialized type field in the comstacks.
88 * Revision 1.5 1995/02/14 20:40:07 quinn
91 * Revision 1.4 1995/02/14 11:54:49 quinn
92 * Beginning to add full CCL.
94 * Revision 1.3 1995/02/10 18:58:10 quinn
95 * Fixed tcpip_get (formerly tcpip_read).
96 * Turned tst (cli) into a proper, event-driven thingy.
98 * Revision 1.2 1995/02/10 15:55:47 quinn
101 * Revision 1.1 1995/02/09 15:51:52 quinn
113 #include <comstack.h>
117 #include <sys/time.h>
120 int tcpip_close(COMSTACK h);
121 int tcpip_put(COMSTACK h, char *buf, int size);
122 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
123 int tcpip_connect(COMSTACK h, void *address);
124 int tcpip_more(COMSTACK h);
125 int tcpip_rcvconnect(COMSTACK h);
126 int tcpip_bind(COMSTACK h, void *address, int mode);
127 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
128 COMSTACK tcpip_accept(COMSTACK h);
129 char *tcpip_addrstr(COMSTACK h);
132 * Determine length/completeness of incoming packages
134 int completeBER(unsigned char *buf, int len); /* from the ODR module */
135 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
143 static int initialized = 0;
145 typedef struct tcpip_state
147 char *altbuf; /* alternate buffer for surplus data */
148 int altsize; /* size as xmalloced */
149 int altlen; /* length of data or 0 if none */
151 int written; /* -1 if we aren't writing */
152 int towrite; /* to verify against user input */
153 int (*complete)(unsigned char *buf, int len); /* length/completeness */
157 * This function is always called through the cs_create() macro.
158 * s >= 0: socket has already been established for us.
160 COMSTACK tcpip_type(int s, int blocking, int protocol)
166 unsigned long tru = 1;
168 struct protoent *proto;
177 requested = MAKEWORD(1, 1);
178 if (WSAStartup(requested, &wd))
187 if (!(proto = getprotobyname("tcp")))
189 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
191 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
198 if (!(p = xmalloc(sizeof(struct comstack))))
200 if (!(state = p->private = xmalloc(sizeof(tcpip_state))))
204 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
206 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
211 p->type = tcpip_type;
212 p->protocol = protocol;
214 p->f_connect = tcpip_connect;
215 p->f_rcvconnect = tcpip_rcvconnect;
216 p->f_get = tcpip_get;
217 p->f_put = tcpip_put;
218 p->f_close = tcpip_close;
219 p->f_more = tcpip_more;
220 p->f_bind = tcpip_bind;
221 p->f_listen = tcpip_listen;
222 p->f_accept = tcpip_accept;
223 p->f_addrstr = tcpip_addrstr;
225 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
231 state->altsize = state->altlen = 0;
232 state->towrite = state->written = -1;
233 if (protocol == PROTO_WAIS)
234 state->complete = completeWAIS;
236 state->complete = completeBER;
238 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
239 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
244 struct sockaddr_in *tcpip_strtoaddr(const char *str)
246 static struct sockaddr_in add;
249 short int port = 210;
252 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
253 add.sin_family = AF_INET;
255 if ((p = strchr(buf, ':')))
260 add.sin_port = htons(port);
261 if (!strcmp("@", buf))
262 add.sin_addr.s_addr = INADDR_ANY;
263 else if ((hp = gethostbyname(buf)))
264 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
265 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
266 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
272 int tcpip_more(COMSTACK h)
274 tcpip_state *sp = h->private;
276 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
281 * connect(2) will block (sometimes) - nothing we can do short of doing
282 * weird things like spawning subprocesses or threading or some weird junk
285 int tcpip_connect(COMSTACK h, void *address)
287 struct sockaddr_in *add = address;
289 TRC(fprintf(stderr, "tcpip_connect\n"));
290 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
293 if (WSAGetLastError() == WSAEWOULDBLOCK)
295 if (errno == EINPROGRESS)
300 h->state = CS_DATAXFER;
307 int tcpip_rcvconnect(COMSTACK h)
309 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
313 int tcpip_bind(COMSTACK h, void *address, int mode)
315 struct sockaddr *addr = address;
316 unsigned long one = 1;
318 TRC(fprintf(stderr, "tcpip_bind\n"));
319 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
324 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
329 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
338 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
340 struct sockaddr_in addr;
341 int len = sizeof(addr);
343 TRC(fprintf(stderr, "tcpip_listen\n"));
344 if (h->state != CS_IDLE)
346 h->cerrno = CSOUTSTATE;
349 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
352 if (WSAGetLastError() == WSAEWOULDBLOCK)
354 if (errno == EWOULDBLOCK)
357 h->cerrno = CSNODATA;
362 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
363 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
370 COMSTACK tcpip_accept(COMSTACK h)
373 tcpip_state *state, *st = h->private;
375 unsigned long tru = 1;
378 TRC(fprintf(stderr, "tcpip_accept\n"));
379 if (h->state != CS_INCON)
381 h->cerrno = CSOUTSTATE;
384 if (!(new = xmalloc(sizeof(*new))))
389 memcpy(new, h, sizeof(*h));
390 new->iofile = h->newfd;
391 if (!(state = new->private = xmalloc(sizeof(tcpip_state))))
397 if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
399 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
403 state->altsize = state->altlen = 0;
404 state->towrite = state->written = -1;
405 state->complete = st->complete;
406 new->state = CS_DATAXFER;
411 #define CS_TCPIP_BUFCHUNK 4096
414 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
415 * 0=connection closed.
417 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
419 tcpip_state *sp = h->private;
421 int tmpi, berlen, rest, req, tomove;
422 int hasread = 0, res;
424 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
425 if (sp->altlen) /* switch buffers */
427 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
428 (unsigned) sp->altbuf));
432 *bufsize = sp->altsize;
433 hasread = sp->altlen;
438 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
442 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
445 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
446 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
448 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
450 if (WSAGetLastError() == WSAEWOULDBLOCK)
452 if (errno == EWOULDBLOCK)
460 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
462 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
464 /* move surplus buffer (or everything if we didn't get a BER rec.) */
465 if (hasread > berlen)
467 tomove = req = hasread - berlen;
468 rest = tomove % CS_TCPIP_BUFCHUNK;
470 req += CS_TCPIP_BUFCHUNK - rest;
473 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
475 } else if (sp->altsize < req)
476 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
478 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
479 (unsigned) sp->altbuf));
480 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
482 if (berlen < CS_TCPIP_BUFCHUNK - 1)
483 *(*buf + berlen) = '\0';
484 return berlen ? berlen : 1;
489 * In nonblocking mode, you must call again with same buffer while
492 int tcpip_put(COMSTACK h, char *buf, int size)
495 struct tcpip_state *state = h->private;
497 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
498 if (state->towrite < 0)
500 state->towrite = size;
503 else if (state->towrite != size)
505 h->cerrno = CSWRONGBUF;
508 while (state->towrite > state->written)
510 if ((res = send(h->iofile, buf + state->written, size -
511 state->written, 0)) < 0)
514 if (WSAGetLastError() == WSAEWOULDBLOCK)
519 TRC(fprintf(stderr, " Flow control stop\n"));
525 state->written += res;
526 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
527 res, state->written, size));
529 state->towrite = state->written = -1;
530 TRC(fprintf(stderr, " Ok\n"));
534 int tcpip_close(COMSTACK h)
536 tcpip_state *sp = h->private;
538 TRC(fprintf(stderr, "tcpip_close\n"));
547 char *tcpip_addrstr(COMSTACK h)
549 struct sockaddr_in addr;
553 struct hostent *host;
556 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
561 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
563 r = (char*) host->h_name;
565 r = inet_ntoa(addr.sin_addr);
566 sprintf(buf, "tcp:%s", r);