2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.9 1996-02-10 12:23:11 quinn
8 * Enablie inetd operations fro TCP/IP stack
10 * Revision 1.8 1995/11/01 13:54:27 quinn
13 * Revision 1.7 1995/10/30 12:41:16 quinn
14 * Added hostname lookup for server.
16 * Revision 1.6 1995/09/29 17:12:00 quinn
19 * Revision 1.5 1995/09/29 17:01:48 quinn
22 * Revision 1.4 1995/09/28 10:12:26 quinn
23 * Windows-support changes
25 * Revision 1.3 1995/09/27 15:02:45 quinn
26 * Modified function heads & prototypes.
28 * Revision 1.2 1995/06/15 12:30:06 quinn
29 * Added @ as hostname alias for INADDR ANY.
31 * Revision 1.1 1995/06/14 09:58:20 quinn
32 * Renamed yazlib to comstack.
34 * Revision 1.20 1995/05/16 08:51:16 quinn
35 * License, documentation, and memory fixes
37 * Revision 1.19 1995/04/10 10:24:08 quinn
40 * Revision 1.18 1995/03/30 13:29:27 quinn
41 * Added REUSEADDR in tcpip_bind
43 * Revision 1.17 1995/03/27 08:36:10 quinn
44 * Some work on nonblocking operation in xmosi.c and rfct.c.
45 * Added protocol parameter to cs_create()
47 * Revision 1.16 1995/03/21 15:53:41 quinn
50 * Revision 1.15 1995/03/21 12:31:27 quinn
51 * Added check for EINPROGRESS on connect.
53 * Revision 1.14 1995/03/20 09:47:21 quinn
54 * Added server-side support to xmosi.c
55 * Fixed possible problems in rfct
58 * Revision 1.13 1995/03/15 16:15:13 adam
61 * Revision 1.12 1995/03/15 15:36:27 quinn
62 * Mods to support nonblocking I/O
64 * Revision 1.11 1995/03/15 08:37:57 quinn
65 * Now we're pretty much set for nonblocking I/O.
67 * Revision 1.10 1995/03/14 17:00:07 quinn
68 * Bug-fixes - added tracing info to tcpip.c
70 * Revision 1.9 1995/03/14 10:28:42 quinn
71 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
73 * Revision 1.8 1995/03/10 14:22:50 quinn
74 * Removed debug output.
76 * Revision 1.7 1995/03/10 11:44:59 quinn
79 * Revision 1.6 1995/03/07 10:26:55 quinn
80 * Initialized type field in the comstacks.
82 * Revision 1.5 1995/02/14 20:40:07 quinn
85 * Revision 1.4 1995/02/14 11:54:49 quinn
86 * Beginning to add full CCL.
88 * Revision 1.3 1995/02/10 18:58:10 quinn
89 * Fixed tcpip_get (formerly tcpip_read).
90 * Turned tst (cli) into a proper, event-driven thingy.
92 * Revision 1.2 1995/02/10 15:55:47 quinn
95 * Revision 1.1 1995/02/09 15:51:52 quinn
107 #include <comstack.h>
111 #include <sys/time.h>
114 int tcpip_close(COMSTACK h);
115 int tcpip_put(COMSTACK h, char *buf, int size);
116 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
117 int tcpip_connect(COMSTACK h, void *address);
118 int tcpip_more(COMSTACK h);
119 int tcpip_rcvconnect(COMSTACK h);
120 int tcpip_bind(COMSTACK h, void *address, int mode);
121 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
122 COMSTACK tcpip_accept(COMSTACK h);
123 char *tcpip_addrstr(COMSTACK h);
125 int completeBER(unsigned char *buf, int len);
133 static int initialized = 0;
135 typedef struct tcpip_state
137 char *altbuf; /* alternate buffer for surplus data */
138 int altsize; /* size as xmalloced */
139 int altlen; /* length of data or 0 if none */
141 int written; /* -1 if we aren't writing */
142 int towrite; /* to verify against user input */
146 * s >= 0: socket has already been established for us.
148 COMSTACK tcpip_type(int s, int blocking, int protocol)
154 unsigned long tru = 1;
156 struct protoent *proto;
165 requested = MAKEWORD(1, 1);
166 if (WSAStartup(requested, &wd))
175 if (!(proto = getprotobyname("tcp")))
177 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
179 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
186 if (!(p = xmalloc(sizeof(struct comstack))))
188 if (!(state = p->private = xmalloc(sizeof(tcpip_state))))
192 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
194 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
199 p->type = tcpip_type;
200 p->protocol = protocol;
202 p->f_connect = tcpip_connect;
203 p->f_rcvconnect = tcpip_rcvconnect;
204 p->f_get = tcpip_get;
205 p->f_put = tcpip_put;
206 p->f_close = tcpip_close;
207 p->f_more = tcpip_more;
208 p->f_bind = tcpip_bind;
209 p->f_listen = tcpip_listen;
210 p->f_accept = tcpip_accept;
211 p->f_addrstr = tcpip_addrstr;
213 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
219 state->altsize = state->altlen = 0;
220 state->towrite = state->written = -1;
222 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
223 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
228 struct sockaddr_in *tcpip_strtoaddr(const char *str)
230 static struct sockaddr_in add;
233 short int port = 210;
236 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
237 add.sin_family = AF_INET;
239 if ((p = strchr(buf, ':')))
244 add.sin_port = htons(port);
245 if (!strcmp("@", buf))
246 add.sin_addr.s_addr = INADDR_ANY;
247 else if ((hp = gethostbyname(buf)))
248 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
249 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
250 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
256 int tcpip_more(COMSTACK h)
258 tcpip_state *sp = h->private;
260 return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen);
264 * connect(2) will block (sometimes) - nothing we can do short of doing
265 * weird things like spawning subprocesses or threading or some weird junk
268 int tcpip_connect(COMSTACK h, void *address)
270 struct sockaddr_in *add = address;
272 TRC(fprintf(stderr, "tcpip_connect\n"));
273 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
276 if (WSAGetLastError() == WSAEWOULDBLOCK)
278 if (errno == EINPROGRESS)
283 h->state = CS_DATAXFER;
290 int tcpip_rcvconnect(COMSTACK h)
292 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
296 int tcpip_bind(COMSTACK h, void *address, int mode)
298 struct sockaddr *addr = address;
299 unsigned long one = 1;
301 TRC(fprintf(stderr, "tcpip_bind\n"));
302 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
307 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
312 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
321 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
323 struct sockaddr_in addr;
324 int len = sizeof(addr);
326 TRC(fprintf(stderr, "tcpip_listen\n"));
327 if (h->state != CS_IDLE)
329 h->cerrno = CSOUTSTATE;
332 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
335 if (WSAGetLastError() == WSAEWOULDBLOCK)
337 if (errno == EWOULDBLOCK)
340 h->cerrno = CSNODATA;
345 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
346 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
353 COMSTACK tcpip_accept(COMSTACK h)
358 unsigned long tru = 1;
361 TRC(fprintf(stderr, "tcpip_accept\n"));
362 if (h->state != CS_INCON)
364 h->cerrno = CSOUTSTATE;
367 if (!(new = xmalloc(sizeof(*new))))
372 memcpy(new, h, sizeof(*h));
373 new->iofile = h->newfd;
374 if (!(state = new->private = xmalloc(sizeof(tcpip_state))))
380 if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
382 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
386 state->altsize = state->altlen = 0;
387 state->towrite = state->written = -1;
388 new->state = CS_DATAXFER;
393 #define CS_TCPIP_BUFCHUNK 4096
396 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
397 * 0=connection closed.
399 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
401 tcpip_state *sp = h->private;
403 int tmpi, berlen, rest, req, tomove;
404 int hasread = 0, res;
406 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
407 if (sp->altlen) /* switch buffers */
409 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
410 (unsigned) sp->altbuf));
414 *bufsize = sp->altsize;
415 hasread = sp->altlen;
420 while (!(berlen = completeBER((unsigned char *)*buf, hasread)))
424 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
427 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
428 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
430 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
432 if (WSAGetLastError() == WSAEWOULDBLOCK)
434 if (errno == EWOULDBLOCK)
442 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
444 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
446 /* move surplus buffer (or everything if we didn't get a BER rec.) */
447 if (hasread > berlen)
449 tomove = req = hasread - berlen;
450 rest = tomove % CS_TCPIP_BUFCHUNK;
452 req += CS_TCPIP_BUFCHUNK - rest;
455 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
457 } else if (sp->altsize < req)
458 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
460 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
461 (unsigned) sp->altbuf));
462 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
464 if (berlen < CS_TCPIP_BUFCHUNK - 1)
465 *(*buf + berlen) = '\0';
466 return berlen ? berlen : 1;
471 * In nonblocking mode, you must call again with same buffer while
474 int tcpip_put(COMSTACK h, char *buf, int size)
477 struct tcpip_state *state = h->private;
479 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
480 if (state->towrite < 0)
482 state->towrite = size;
485 else if (state->towrite != size)
487 h->cerrno = CSWRONGBUF;
490 while (state->towrite > state->written)
492 if ((res = send(h->iofile, buf + state->written, size -
493 state->written, 0)) < 0)
496 if (WSAGetLastError() == WSAEWOULDBLOCK)
501 TRC(fprintf(stderr, " Flow control stop\n"));
507 state->written += res;
508 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
509 res, state->written, size));
511 state->towrite = state->written = -1;
512 TRC(fprintf(stderr, " Ok\n"));
516 int tcpip_close(COMSTACK h)
518 tcpip_state *sp = h->private;
520 TRC(fprintf(stderr, "tcpip_close\n"));
529 char *tcpip_addrstr(COMSTACK h)
531 struct sockaddr_in addr;
535 struct hostent *host;
538 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
543 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
545 r = (char*) host->h_name;
547 r = inet_ntoa(addr.sin_addr);
548 sprintf(buf, "tcp:%s", r);