2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.1 1995-06-14 09:58:20 quinn
8 * Renamed yazlib to comstack.
10 * Revision 1.20 1995/05/16 08:51:16 quinn
11 * License, documentation, and memory fixes
13 * Revision 1.19 1995/04/10 10:24:08 quinn
16 * Revision 1.18 1995/03/30 13:29:27 quinn
17 * Added REUSEADDR in tcpip_bind
19 * Revision 1.17 1995/03/27 08:36:10 quinn
20 * Some work on nonblocking operation in xmosi.c and rfct.c.
21 * Added protocol parameter to cs_create()
23 * Revision 1.16 1995/03/21 15:53:41 quinn
26 * Revision 1.15 1995/03/21 12:31:27 quinn
27 * Added check for EINPROGRESS on connect.
29 * Revision 1.14 1995/03/20 09:47:21 quinn
30 * Added server-side support to xmosi.c
31 * Fixed possible problems in rfct
34 * Revision 1.13 1995/03/15 16:15:13 adam
37 * Revision 1.12 1995/03/15 15:36:27 quinn
38 * Mods to support nonblocking I/O
40 * Revision 1.11 1995/03/15 08:37:57 quinn
41 * Now we're pretty much set for nonblocking I/O.
43 * Revision 1.10 1995/03/14 17:00:07 quinn
44 * Bug-fixes - added tracing info to tcpip.c
46 * Revision 1.9 1995/03/14 10:28:42 quinn
47 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
49 * Revision 1.8 1995/03/10 14:22:50 quinn
50 * Removed debug output.
52 * Revision 1.7 1995/03/10 11:44:59 quinn
55 * Revision 1.6 1995/03/07 10:26:55 quinn
56 * Initialized type field in the comstacks.
58 * Revision 1.5 1995/02/14 20:40:07 quinn
61 * Revision 1.4 1995/02/14 11:54:49 quinn
62 * Beginning to add full CCL.
64 * Revision 1.3 1995/02/10 18:58:10 quinn
65 * Fixed tcpip_get (formerly tcpip_read).
66 * Turned tst (cli) into a proper, event-driven thingy.
68 * Revision 1.2 1995/02/10 15:55:47 quinn
71 * Revision 1.1 1995/02/09 15:51:52 quinn
87 int tcpip_close(COMSTACK h);
88 int tcpip_put(COMSTACK h, char *buf, int size);
89 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
90 int tcpip_connect(COMSTACK h, void *address);
91 int tcpip_more(COMSTACK h);
92 int tcpip_rcvconnect(COMSTACK h);
93 int tcpip_bind(COMSTACK h, void *address, int mode);
94 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
95 COMSTACK tcpip_accept(COMSTACK h);
97 int completeBER(unsigned char *buf, int len);
105 typedef struct tcpip_state
107 char *altbuf; /* alternate buffer for surplus data */
108 int altsize; /* size as malloced */
109 int altlen; /* length of data or 0 if none */
111 int written; /* -1 if we aren't writing */
112 int towrite; /* to verify against user input */
115 COMSTACK tcpip_type(int blocking, int protocol)
118 struct protoent *proto;
122 if (!(proto = getprotobyname("tcp")))
124 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
126 if (!(p = malloc(sizeof(struct comstack))))
128 if (!(state = p->private = malloc(sizeof(tcpip_state))))
130 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
134 p->type = tcpip_type;
135 p->protocol = protocol;
137 p->f_connect = tcpip_connect;
138 p->f_rcvconnect = tcpip_rcvconnect;
139 p->f_get = tcpip_get;
140 p->f_put = tcpip_put;
141 p->f_close = tcpip_close;
142 p->f_more = tcpip_more;
143 p->f_bind = tcpip_bind;
144 p->f_listen = tcpip_listen;
145 p->f_accept = tcpip_accept;
153 state->altsize = state->altlen = 0;
154 state->towrite = state->written = -1;
156 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
157 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
162 struct sockaddr_in *tcpip_strtoaddr(const char *str)
164 static struct sockaddr_in add;
167 short int port = 210;
170 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
171 add.sin_family = AF_INET;
173 if ((p = strchr(buf, ':')))
178 add.sin_port = htons(port);
179 if ((hp = gethostbyname(buf)))
180 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
181 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
182 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
188 int tcpip_more(COMSTACK h)
190 tcpip_state *sp = h->private;
192 return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen);
196 * connect(2) will block - nothing we can do short of doing weird things
197 * like spawning subprocesses or threading or some weird junk like that.
199 int tcpip_connect(COMSTACK h, void *address)
201 struct sockaddr_in *add = address;
203 TRC(fprintf(stderr, "tcpip_connect\n"));
204 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
206 if (errno == EINPROGRESS)
210 h->state = CS_DATAXFER;
217 int tcpip_rcvconnect(COMSTACK h)
219 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
223 int tcpip_bind(COMSTACK h, void *address, int mode)
225 struct sockaddr *addr = address;
228 TRC(fprintf(stderr, "tcpip_bind\n"));
229 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
234 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
239 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
248 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
250 struct sockaddr_in addr;
251 int len = sizeof(addr);
253 TRC(fprintf(stderr, "tcpip_listen\n"));
254 if (h->state != CS_IDLE)
256 h->errno = CSOUTSTATE;
259 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
261 if (errno == EWOULDBLOCK)
267 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
268 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
275 COMSTACK tcpip_accept(COMSTACK h)
280 TRC(fprintf(stderr, "tcpip_accept\n"));
281 if (h->state != CS_INCON)
283 h->errno = CSOUTSTATE;
286 if (!(new = malloc(sizeof(*new))))
291 memcpy(new, h, sizeof(*h));
292 new->iofile = h->newfd;
293 if (!(state = new->private = malloc(sizeof(tcpip_state))))
298 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
301 state->altsize = state->altlen = 0;
302 state->towrite = state->written = -1;
303 new->state = CS_DATAXFER;
308 #define CS_TCPIP_BUFCHUNK 4096
311 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
312 * 0=connection closed.
314 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
316 tcpip_state *sp = h->private;
318 int tmpi, berlen, rest, req, tomove;
319 int hasread = 0, res;
321 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
322 if (sp->altlen) /* switch buffers */
324 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
325 (unsigned) sp->altbuf));
329 *bufsize = sp->altsize;
330 hasread = sp->altlen;
335 while (!(berlen = completeBER((unsigned char *)*buf, hasread)))
339 if (!(*buf = malloc(*bufsize = CS_TCPIP_BUFCHUNK)))
342 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
343 if (!(*buf = realloc(*buf, *bufsize *= 2)))
345 if ((res = read(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK)) < 0)
346 if (errno == EWOULDBLOCK)
353 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
355 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
357 /* move surplus buffer (or everything if we didn't get a BER rec.) */
358 if (hasread > berlen)
360 tomove = req = hasread - berlen;
361 rest = tomove % CS_TCPIP_BUFCHUNK;
363 req += CS_TCPIP_BUFCHUNK - rest;
366 if (!(sp->altbuf = malloc(sp->altsize = req)))
368 } else if (sp->altsize < req)
369 if (!(sp->altbuf = realloc(sp->altbuf, sp->altsize = req)))
371 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
372 (unsigned) sp->altbuf));
373 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
375 if (berlen < CS_TCPIP_BUFCHUNK - 1)
376 *(*buf + berlen) = '\0';
377 return berlen ? berlen : 1;
382 * In nonblocking mode, you must call again with same buffer while
385 int tcpip_put(COMSTACK h, char *buf, int size)
388 struct tcpip_state *state = h->private;
390 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
391 if (state->towrite < 0)
393 state->towrite = size;
396 else if (state->towrite != size)
398 h->errno = CSWRONGBUF;
401 while (state->towrite > state->written)
403 if ((res = write(h->iofile, buf + state->written, size -
404 state->written)) < 0)
408 TRC(fprintf(stderr, " Flow control stop\n"));
414 state->written += res;
415 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
416 res, state->written, size));
418 state->towrite = state->written = -1;
419 TRC(fprintf(stderr, " Ok\n"));
423 int tcpip_close(COMSTACK h)
425 tcpip_state *sp = h->private;
427 TRC(fprintf(stderr, "tcpip_close\n"));