2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.2 1995-06-15 12:30:06 quinn
8 * Added @ as hostname alias for INADDR ANY.
10 * Revision 1.1 1995/06/14 09:58:20 quinn
11 * Renamed yazlib to comstack.
13 * Revision 1.20 1995/05/16 08:51:16 quinn
14 * License, documentation, and memory fixes
16 * Revision 1.19 1995/04/10 10:24:08 quinn
19 * Revision 1.18 1995/03/30 13:29:27 quinn
20 * Added REUSEADDR in tcpip_bind
22 * Revision 1.17 1995/03/27 08:36:10 quinn
23 * Some work on nonblocking operation in xmosi.c and rfct.c.
24 * Added protocol parameter to cs_create()
26 * Revision 1.16 1995/03/21 15:53:41 quinn
29 * Revision 1.15 1995/03/21 12:31:27 quinn
30 * Added check for EINPROGRESS on connect.
32 * Revision 1.14 1995/03/20 09:47:21 quinn
33 * Added server-side support to xmosi.c
34 * Fixed possible problems in rfct
37 * Revision 1.13 1995/03/15 16:15:13 adam
40 * Revision 1.12 1995/03/15 15:36:27 quinn
41 * Mods to support nonblocking I/O
43 * Revision 1.11 1995/03/15 08:37:57 quinn
44 * Now we're pretty much set for nonblocking I/O.
46 * Revision 1.10 1995/03/14 17:00:07 quinn
47 * Bug-fixes - added tracing info to tcpip.c
49 * Revision 1.9 1995/03/14 10:28:42 quinn
50 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
52 * Revision 1.8 1995/03/10 14:22:50 quinn
53 * Removed debug output.
55 * Revision 1.7 1995/03/10 11:44:59 quinn
58 * Revision 1.6 1995/03/07 10:26:55 quinn
59 * Initialized type field in the comstacks.
61 * Revision 1.5 1995/02/14 20:40:07 quinn
64 * Revision 1.4 1995/02/14 11:54:49 quinn
65 * Beginning to add full CCL.
67 * Revision 1.3 1995/02/10 18:58:10 quinn
68 * Fixed tcpip_get (formerly tcpip_read).
69 * Turned tst (cli) into a proper, event-driven thingy.
71 * Revision 1.2 1995/02/10 15:55:47 quinn
74 * Revision 1.1 1995/02/09 15:51:52 quinn
90 int tcpip_close(COMSTACK h);
91 int tcpip_put(COMSTACK h, char *buf, int size);
92 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
93 int tcpip_connect(COMSTACK h, void *address);
94 int tcpip_more(COMSTACK h);
95 int tcpip_rcvconnect(COMSTACK h);
96 int tcpip_bind(COMSTACK h, void *address, int mode);
97 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
98 COMSTACK tcpip_accept(COMSTACK h);
100 int completeBER(unsigned char *buf, int len);
108 typedef struct tcpip_state
110 char *altbuf; /* alternate buffer for surplus data */
111 int altsize; /* size as malloced */
112 int altlen; /* length of data or 0 if none */
114 int written; /* -1 if we aren't writing */
115 int towrite; /* to verify against user input */
118 COMSTACK tcpip_type(int blocking, int protocol)
121 struct protoent *proto;
125 if (!(proto = getprotobyname("tcp")))
127 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
129 if (!(p = malloc(sizeof(struct comstack))))
131 if (!(state = p->private = malloc(sizeof(tcpip_state))))
133 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
137 p->type = tcpip_type;
138 p->protocol = protocol;
140 p->f_connect = tcpip_connect;
141 p->f_rcvconnect = tcpip_rcvconnect;
142 p->f_get = tcpip_get;
143 p->f_put = tcpip_put;
144 p->f_close = tcpip_close;
145 p->f_more = tcpip_more;
146 p->f_bind = tcpip_bind;
147 p->f_listen = tcpip_listen;
148 p->f_accept = tcpip_accept;
156 state->altsize = state->altlen = 0;
157 state->towrite = state->written = -1;
159 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
160 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
165 struct sockaddr_in *tcpip_strtoaddr(const char *str)
167 static struct sockaddr_in add;
170 short int port = 210;
173 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
174 add.sin_family = AF_INET;
176 if ((p = strchr(buf, ':')))
181 add.sin_port = htons(port);
182 if (!strcmp("@", buf))
183 add.sin_addr.s_addr = INADDR_ANY;
184 else if ((hp = gethostbyname(buf)))
185 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
186 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
187 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
193 int tcpip_more(COMSTACK h)
195 tcpip_state *sp = h->private;
197 return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen);
201 * connect(2) will block - nothing we can do short of doing weird things
202 * like spawning subprocesses or threading or some weird junk like that.
204 int tcpip_connect(COMSTACK h, void *address)
206 struct sockaddr_in *add = address;
208 TRC(fprintf(stderr, "tcpip_connect\n"));
209 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
211 if (errno == EINPROGRESS)
215 h->state = CS_DATAXFER;
222 int tcpip_rcvconnect(COMSTACK h)
224 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
228 int tcpip_bind(COMSTACK h, void *address, int mode)
230 struct sockaddr *addr = address;
233 TRC(fprintf(stderr, "tcpip_bind\n"));
234 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
239 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
244 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
253 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
255 struct sockaddr_in addr;
256 int len = sizeof(addr);
258 TRC(fprintf(stderr, "tcpip_listen\n"));
259 if (h->state != CS_IDLE)
261 h->errno = CSOUTSTATE;
264 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
266 if (errno == EWOULDBLOCK)
272 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
273 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
280 COMSTACK tcpip_accept(COMSTACK h)
285 TRC(fprintf(stderr, "tcpip_accept\n"));
286 if (h->state != CS_INCON)
288 h->errno = CSOUTSTATE;
291 if (!(new = malloc(sizeof(*new))))
296 memcpy(new, h, sizeof(*h));
297 new->iofile = h->newfd;
298 if (!(state = new->private = malloc(sizeof(tcpip_state))))
303 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
306 state->altsize = state->altlen = 0;
307 state->towrite = state->written = -1;
308 new->state = CS_DATAXFER;
313 #define CS_TCPIP_BUFCHUNK 4096
316 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
317 * 0=connection closed.
319 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
321 tcpip_state *sp = h->private;
323 int tmpi, berlen, rest, req, tomove;
324 int hasread = 0, res;
326 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
327 if (sp->altlen) /* switch buffers */
329 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
330 (unsigned) sp->altbuf));
334 *bufsize = sp->altsize;
335 hasread = sp->altlen;
340 while (!(berlen = completeBER((unsigned char *)*buf, hasread)))
344 if (!(*buf = malloc(*bufsize = CS_TCPIP_BUFCHUNK)))
347 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
348 if (!(*buf = realloc(*buf, *bufsize *= 2)))
350 if ((res = read(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK)) < 0)
351 if (errno == EWOULDBLOCK)
358 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
360 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
362 /* move surplus buffer (or everything if we didn't get a BER rec.) */
363 if (hasread > berlen)
365 tomove = req = hasread - berlen;
366 rest = tomove % CS_TCPIP_BUFCHUNK;
368 req += CS_TCPIP_BUFCHUNK - rest;
371 if (!(sp->altbuf = malloc(sp->altsize = req)))
373 } else if (sp->altsize < req)
374 if (!(sp->altbuf = realloc(sp->altbuf, sp->altsize = req)))
376 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
377 (unsigned) sp->altbuf));
378 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
380 if (berlen < CS_TCPIP_BUFCHUNK - 1)
381 *(*buf + berlen) = '\0';
382 return berlen ? berlen : 1;
387 * In nonblocking mode, you must call again with same buffer while
390 int tcpip_put(COMSTACK h, char *buf, int size)
393 struct tcpip_state *state = h->private;
395 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
396 if (state->towrite < 0)
398 state->towrite = size;
401 else if (state->towrite != size)
403 h->errno = CSWRONGBUF;
406 while (state->towrite > state->written)
408 if ((res = write(h->iofile, buf + state->written, size -
409 state->written)) < 0)
413 TRC(fprintf(stderr, " Flow control stop\n"));
419 state->written += res;
420 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
421 res, state->written, size));
423 state->towrite = state->written = -1;
424 TRC(fprintf(stderr, " Ok\n"));
428 int tcpip_close(COMSTACK h)
430 tcpip_state *sp = h->private;
432 TRC(fprintf(stderr, "tcpip_close\n"));