2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.4 1995-09-28 10:12:26 quinn
8 * Windows-support changes
10 * Revision 1.3 1995/09/27 15:02:45 quinn
11 * Modified function heads & prototypes.
13 * Revision 1.2 1995/06/15 12:30:06 quinn
14 * Added @ as hostname alias for INADDR ANY.
16 * Revision 1.1 1995/06/14 09:58:20 quinn
17 * Renamed yazlib to comstack.
19 * Revision 1.20 1995/05/16 08:51:16 quinn
20 * License, documentation, and memory fixes
22 * Revision 1.19 1995/04/10 10:24:08 quinn
25 * Revision 1.18 1995/03/30 13:29:27 quinn
26 * Added REUSEADDR in tcpip_bind
28 * Revision 1.17 1995/03/27 08:36:10 quinn
29 * Some work on nonblocking operation in xmosi.c and rfct.c.
30 * Added protocol parameter to cs_create()
32 * Revision 1.16 1995/03/21 15:53:41 quinn
35 * Revision 1.15 1995/03/21 12:31:27 quinn
36 * Added check for EINPROGRESS on connect.
38 * Revision 1.14 1995/03/20 09:47:21 quinn
39 * Added server-side support to xmosi.c
40 * Fixed possible problems in rfct
43 * Revision 1.13 1995/03/15 16:15:13 adam
46 * Revision 1.12 1995/03/15 15:36:27 quinn
47 * Mods to support nonblocking I/O
49 * Revision 1.11 1995/03/15 08:37:57 quinn
50 * Now we're pretty much set for nonblocking I/O.
52 * Revision 1.10 1995/03/14 17:00:07 quinn
53 * Bug-fixes - added tracing info to tcpip.c
55 * Revision 1.9 1995/03/14 10:28:42 quinn
56 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
58 * Revision 1.8 1995/03/10 14:22:50 quinn
59 * Removed debug output.
61 * Revision 1.7 1995/03/10 11:44:59 quinn
64 * Revision 1.6 1995/03/07 10:26:55 quinn
65 * Initialized type field in the comstacks.
67 * Revision 1.5 1995/02/14 20:40:07 quinn
70 * Revision 1.4 1995/02/14 11:54:49 quinn
71 * Beginning to add full CCL.
73 * Revision 1.3 1995/02/10 18:58:10 quinn
74 * Fixed tcpip_get (formerly tcpip_read).
75 * Turned tst (cli) into a proper, event-driven thingy.
77 * Revision 1.2 1995/02/10 15:55:47 quinn
80 * Revision 1.1 1995/02/09 15:51:52 quinn
99 int tcpip_close(COMSTACK h);
100 int tcpip_put(COMSTACK h, char *buf, int size);
101 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
102 int tcpip_connect(COMSTACK h, void *address);
103 int tcpip_more(COMSTACK h);
104 int tcpip_rcvconnect(COMSTACK h);
105 int tcpip_bind(COMSTACK h, void *address, int mode);
106 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
107 COMSTACK tcpip_accept(COMSTACK h);
109 int completeBER(unsigned char *buf, int len);
117 static int initialized = 0;
119 typedef struct tcpip_state
121 char *altbuf; /* alternate buffer for surplus data */
122 int altsize; /* size as malloced */
123 int altlen; /* length of data or 0 if none */
125 int written; /* -1 if we aren't writing */
126 int towrite; /* to verify against user input */
129 COMSTACK MDF tcpip_type(int blocking, int protocol)
132 struct protoent *proto;
142 requested = MAKEWORD(1, 1);
143 if (WSAStartup(requested, &wd))
150 if (!(proto = getprotobyname("tcp")))
152 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
154 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
157 if (!(p = malloc(sizeof(struct comstack))))
159 if (!(state = p->private = malloc(sizeof(tcpip_state))))
162 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
164 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
169 p->type = tcpip_type;
170 p->protocol = protocol;
172 p->f_connect = tcpip_connect;
173 p->f_rcvconnect = tcpip_rcvconnect;
174 p->f_get = tcpip_get;
175 p->f_put = tcpip_put;
176 p->f_close = tcpip_close;
177 p->f_more = tcpip_more;
178 p->f_bind = tcpip_bind;
179 p->f_listen = tcpip_listen;
180 p->f_accept = tcpip_accept;
188 state->altsize = state->altlen = 0;
189 state->towrite = state->written = -1;
191 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
192 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
197 struct sockaddr_in MDF *tcpip_strtoaddr(const char *str)
199 static struct sockaddr_in add;
202 short int port = 210;
205 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
206 add.sin_family = AF_INET;
208 if ((p = strchr(buf, ':')))
213 add.sin_port = htons(port);
214 if (!strcmp("@", buf))
215 add.sin_addr.s_addr = INADDR_ANY;
216 else if ((hp = gethostbyname(buf)))
217 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
218 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
219 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
225 int tcpip_more(COMSTACK h)
227 tcpip_state *sp = h->private;
229 return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen);
233 * connect(2) will block (sometimes) - nothing we can do short of doing
234 * weird things like spawning subprocesses or threading or some weird junk
237 int tcpip_connect(COMSTACK h, void *address)
239 struct sockaddr_in *add = address;
241 TRC(fprintf(stderr, "tcpip_connect\n"));
242 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
245 if (errno == WSAEWOULDBLOCK)
247 if (errno == EINPROGRESS)
252 h->state = CS_DATAXFER;
259 int tcpip_rcvconnect(COMSTACK h)
261 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
265 int tcpip_bind(COMSTACK h, void *address, int mode)
267 struct sockaddr *addr = address;
270 TRC(fprintf(stderr, "tcpip_bind\n"));
271 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
276 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
281 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
290 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
292 struct sockaddr_in addr;
293 int len = sizeof(addr);
295 TRC(fprintf(stderr, "tcpip_listen\n"));
296 if (h->state != CS_IDLE)
298 h->cerrno = CSOUTSTATE;
301 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
304 if (errno == WSAEWOULDBLOCK)
306 if (errno == EWOULDBLOCK)
309 h->cerrno = CSNODATA;
314 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
315 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
322 COMSTACK tcpip_accept(COMSTACK h)
327 TRC(fprintf(stderr, "tcpip_accept\n"));
328 if (h->state != CS_INCON)
330 h->cerrno = CSOUTSTATE;
333 if (!(new = malloc(sizeof(*new))))
338 memcpy(new, h, sizeof(*h));
339 new->iofile = h->newfd;
340 if (!(state = new->private = malloc(sizeof(tcpip_state))))
346 if (!new->blocking && ioctlsocket(s, FIONBIO, &tru) < 0)
348 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
352 state->altsize = state->altlen = 0;
353 state->towrite = state->written = -1;
354 new->state = CS_DATAXFER;
359 #define CS_TCPIP_BUFCHUNK 4096
362 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
363 * 0=connection closed.
365 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
367 tcpip_state *sp = h->private;
369 int tmpi, berlen, rest, req, tomove;
370 int hasread = 0, res;
372 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
373 if (sp->altlen) /* switch buffers */
375 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
376 (unsigned) sp->altbuf));
380 *bufsize = sp->altsize;
381 hasread = sp->altlen;
386 while (!(berlen = completeBER((unsigned char *)*buf, hasread)))
390 if (!(*buf = malloc(*bufsize = CS_TCPIP_BUFCHUNK)))
393 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
394 if (!(*buf = realloc(*buf, *bufsize *= 2)))
396 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
398 if (errno == WSAEWOULDBLOCK)
400 if (errno == EWOULDBLOCK)
408 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
410 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
412 /* move surplus buffer (or everything if we didn't get a BER rec.) */
413 if (hasread > berlen)
415 tomove = req = hasread - berlen;
416 rest = tomove % CS_TCPIP_BUFCHUNK;
418 req += CS_TCPIP_BUFCHUNK - rest;
421 if (!(sp->altbuf = malloc(sp->altsize = req)))
423 } else if (sp->altsize < req)
424 if (!(sp->altbuf = realloc(sp->altbuf, sp->altsize = req)))
426 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
427 (unsigned) sp->altbuf));
428 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
430 if (berlen < CS_TCPIP_BUFCHUNK - 1)
431 *(*buf + berlen) = '\0';
432 return berlen ? berlen : 1;
437 * In nonblocking mode, you must call again with same buffer while
440 int tcpip_put(COMSTACK h, char *buf, int size)
443 struct tcpip_state *state = h->private;
445 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
446 if (state->towrite < 0)
448 state->towrite = size;
451 else if (state->towrite != size)
453 h->cerrno = CSWRONGBUF;
456 while (state->towrite > state->written)
458 if ((res = send(h->iofile, buf + state->written, size -
459 state->written, 0)) < 0)
462 if (errno == WSAEWOULDBLOCK)
467 TRC(fprintf(stderr, " Flow control stop\n"));
473 state->written += res;
474 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
475 res, state->written, size));
477 state->towrite = state->written = -1;
478 TRC(fprintf(stderr, " Ok\n"));
482 int tcpip_close(COMSTACK h)
484 tcpip_state *sp = h->private;
486 TRC(fprintf(stderr, "tcpip_close\n"));