2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.3 1995-09-27 15:02:45 quinn
8 * Modified function heads & prototypes.
10 * Revision 1.2 1995/06/15 12:30:06 quinn
11 * Added @ as hostname alias for INADDR ANY.
13 * Revision 1.1 1995/06/14 09:58:20 quinn
14 * Renamed yazlib to comstack.
16 * Revision 1.20 1995/05/16 08:51:16 quinn
17 * License, documentation, and memory fixes
19 * Revision 1.19 1995/04/10 10:24:08 quinn
22 * Revision 1.18 1995/03/30 13:29:27 quinn
23 * Added REUSEADDR in tcpip_bind
25 * Revision 1.17 1995/03/27 08:36:10 quinn
26 * Some work on nonblocking operation in xmosi.c and rfct.c.
27 * Added protocol parameter to cs_create()
29 * Revision 1.16 1995/03/21 15:53:41 quinn
32 * Revision 1.15 1995/03/21 12:31:27 quinn
33 * Added check for EINPROGRESS on connect.
35 * Revision 1.14 1995/03/20 09:47:21 quinn
36 * Added server-side support to xmosi.c
37 * Fixed possible problems in rfct
40 * Revision 1.13 1995/03/15 16:15:13 adam
43 * Revision 1.12 1995/03/15 15:36:27 quinn
44 * Mods to support nonblocking I/O
46 * Revision 1.11 1995/03/15 08:37:57 quinn
47 * Now we're pretty much set for nonblocking I/O.
49 * Revision 1.10 1995/03/14 17:00:07 quinn
50 * Bug-fixes - added tracing info to tcpip.c
52 * Revision 1.9 1995/03/14 10:28:42 quinn
53 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
55 * Revision 1.8 1995/03/10 14:22:50 quinn
56 * Removed debug output.
58 * Revision 1.7 1995/03/10 11:44:59 quinn
61 * Revision 1.6 1995/03/07 10:26:55 quinn
62 * Initialized type field in the comstacks.
64 * Revision 1.5 1995/02/14 20:40:07 quinn
67 * Revision 1.4 1995/02/14 11:54:49 quinn
68 * Beginning to add full CCL.
70 * Revision 1.3 1995/02/10 18:58:10 quinn
71 * Fixed tcpip_get (formerly tcpip_read).
72 * Turned tst (cli) into a proper, event-driven thingy.
74 * Revision 1.2 1995/02/10 15:55:47 quinn
77 * Revision 1.1 1995/02/09 15:51:52 quinn
93 int tcpip_close(COMSTACK h);
94 int tcpip_put(COMSTACK h, char *buf, int size);
95 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
96 int tcpip_connect(COMSTACK h, void *address);
97 int tcpip_more(COMSTACK h);
98 int tcpip_rcvconnect(COMSTACK h);
99 int tcpip_bind(COMSTACK h, void *address, int mode);
100 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
101 COMSTACK tcpip_accept(COMSTACK h);
103 int completeBER(unsigned char *buf, int len);
111 typedef struct tcpip_state
113 char *altbuf; /* alternate buffer for surplus data */
114 int altsize; /* size as malloced */
115 int altlen; /* length of data or 0 if none */
117 int written; /* -1 if we aren't writing */
118 int towrite; /* to verify against user input */
121 COMSTACK MDF tcpip_type(int blocking, int protocol)
124 struct protoent *proto;
128 if (!(proto = getprotobyname("tcp")))
130 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
132 if (!(p = malloc(sizeof(struct comstack))))
134 if (!(state = p->private = malloc(sizeof(tcpip_state))))
136 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
140 p->type = tcpip_type;
141 p->protocol = protocol;
143 p->f_connect = tcpip_connect;
144 p->f_rcvconnect = tcpip_rcvconnect;
145 p->f_get = tcpip_get;
146 p->f_put = tcpip_put;
147 p->f_close = tcpip_close;
148 p->f_more = tcpip_more;
149 p->f_bind = tcpip_bind;
150 p->f_listen = tcpip_listen;
151 p->f_accept = tcpip_accept;
159 state->altsize = state->altlen = 0;
160 state->towrite = state->written = -1;
162 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
163 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
168 struct sockaddr_in MDF *tcpip_strtoaddr(const char *str)
170 static struct sockaddr_in add;
173 short int port = 210;
176 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
177 add.sin_family = AF_INET;
179 if ((p = strchr(buf, ':')))
184 add.sin_port = htons(port);
185 if (!strcmp("@", buf))
186 add.sin_addr.s_addr = INADDR_ANY;
187 else if ((hp = gethostbyname(buf)))
188 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
189 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
190 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
196 int tcpip_more(COMSTACK h)
198 tcpip_state *sp = h->private;
200 return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen);
204 * connect(2) will block - nothing we can do short of doing weird things
205 * like spawning subprocesses or threading or some weird junk like that.
207 int tcpip_connect(COMSTACK h, void *address)
209 struct sockaddr_in *add = address;
211 TRC(fprintf(stderr, "tcpip_connect\n"));
212 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
214 if (errno == EINPROGRESS)
218 h->state = CS_DATAXFER;
225 int tcpip_rcvconnect(COMSTACK h)
227 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
231 int tcpip_bind(COMSTACK h, void *address, int mode)
233 struct sockaddr *addr = address;
236 TRC(fprintf(stderr, "tcpip_bind\n"));
237 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
242 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
247 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
256 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
258 struct sockaddr_in addr;
259 int len = sizeof(addr);
261 TRC(fprintf(stderr, "tcpip_listen\n"));
262 if (h->state != CS_IDLE)
264 h->errno = CSOUTSTATE;
267 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
269 if (errno == EWOULDBLOCK)
275 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
276 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
283 COMSTACK tcpip_accept(COMSTACK h)
288 TRC(fprintf(stderr, "tcpip_accept\n"));
289 if (h->state != CS_INCON)
291 h->errno = CSOUTSTATE;
294 if (!(new = malloc(sizeof(*new))))
299 memcpy(new, h, sizeof(*h));
300 new->iofile = h->newfd;
301 if (!(state = new->private = malloc(sizeof(tcpip_state))))
306 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
309 state->altsize = state->altlen = 0;
310 state->towrite = state->written = -1;
311 new->state = CS_DATAXFER;
316 #define CS_TCPIP_BUFCHUNK 4096
319 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
320 * 0=connection closed.
322 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
324 tcpip_state *sp = h->private;
326 int tmpi, berlen, rest, req, tomove;
327 int hasread = 0, res;
329 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
330 if (sp->altlen) /* switch buffers */
332 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
333 (unsigned) sp->altbuf));
337 *bufsize = sp->altsize;
338 hasread = sp->altlen;
343 while (!(berlen = completeBER((unsigned char *)*buf, hasread)))
347 if (!(*buf = malloc(*bufsize = CS_TCPIP_BUFCHUNK)))
350 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
351 if (!(*buf = realloc(*buf, *bufsize *= 2)))
353 if ((res = read(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK)) < 0)
354 if (errno == EWOULDBLOCK)
361 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
363 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
365 /* move surplus buffer (or everything if we didn't get a BER rec.) */
366 if (hasread > berlen)
368 tomove = req = hasread - berlen;
369 rest = tomove % CS_TCPIP_BUFCHUNK;
371 req += CS_TCPIP_BUFCHUNK - rest;
374 if (!(sp->altbuf = malloc(sp->altsize = req)))
376 } else if (sp->altsize < req)
377 if (!(sp->altbuf = realloc(sp->altbuf, sp->altsize = req)))
379 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
380 (unsigned) sp->altbuf));
381 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
383 if (berlen < CS_TCPIP_BUFCHUNK - 1)
384 *(*buf + berlen) = '\0';
385 return berlen ? berlen : 1;
390 * In nonblocking mode, you must call again with same buffer while
393 int tcpip_put(COMSTACK h, char *buf, int size)
396 struct tcpip_state *state = h->private;
398 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
399 if (state->towrite < 0)
401 state->towrite = size;
404 else if (state->towrite != size)
406 h->errno = CSWRONGBUF;
409 while (state->towrite > state->written)
411 if ((res = write(h->iofile, buf + state->written, size -
412 state->written)) < 0)
416 TRC(fprintf(stderr, " Flow control stop\n"));
422 state->written += res;
423 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
424 res, state->written, size));
426 state->towrite = state->written = -1;
427 TRC(fprintf(stderr, " Ok\n"));
431 int tcpip_close(COMSTACK h)
433 tcpip_state *sp = h->private;
435 TRC(fprintf(stderr, "tcpip_close\n"));