2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.14 1997-05-01 15:06:32 adam
8 * Moved WINSOCK init. code to tcpip_init routine.
10 * Revision 1.13 1996/11/01 08:45:18 adam
11 * Bug fix: used close on MS-Windows. Fixed to closesocket.
13 * Revision 1.12 1996/07/06 19:58:30 quinn
14 * System headerfiles gathered in yconfig
16 * Revision 1.11 1996/02/23 10:00:39 quinn
19 * Revision 1.10 1996/02/20 12:52:11 quinn
20 * WAIS protocol support.
22 * Revision 1.9 1996/02/10 12:23:11 quinn
23 * Enablie inetd operations fro TCP/IP stack
25 * Revision 1.8 1995/11/01 13:54:27 quinn
28 * Revision 1.7 1995/10/30 12:41:16 quinn
29 * Added hostname lookup for server.
31 * Revision 1.6 1995/09/29 17:12:00 quinn
34 * Revision 1.5 1995/09/29 17:01:48 quinn
37 * Revision 1.4 1995/09/28 10:12:26 quinn
38 * Windows-support changes
40 * Revision 1.3 1995/09/27 15:02:45 quinn
41 * Modified function heads & prototypes.
43 * Revision 1.2 1995/06/15 12:30:06 quinn
44 * Added @ as hostname alias for INADDR ANY.
46 * Revision 1.1 1995/06/14 09:58:20 quinn
47 * Renamed yazlib to comstack.
49 * Revision 1.20 1995/05/16 08:51:16 quinn
50 * License, documentation, and memory fixes
52 * Revision 1.19 1995/04/10 10:24:08 quinn
55 * Revision 1.18 1995/03/30 13:29:27 quinn
56 * Added REUSEADDR in tcpip_bind
58 * Revision 1.17 1995/03/27 08:36:10 quinn
59 * Some work on nonblocking operation in xmosi.c and rfct.c.
60 * Added protocol parameter to cs_create()
62 * Revision 1.16 1995/03/21 15:53:41 quinn
65 * Revision 1.15 1995/03/21 12:31:27 quinn
66 * Added check for EINPROGRESS on connect.
68 * Revision 1.14 1995/03/20 09:47:21 quinn
69 * Added server-side support to xmosi.c
70 * Fixed possible problems in rfct
73 * Revision 1.13 1995/03/15 16:15:13 adam
76 * Revision 1.12 1995/03/15 15:36:27 quinn
77 * Mods to support nonblocking I/O
79 * Revision 1.11 1995/03/15 08:37:57 quinn
80 * Now we're pretty much set for nonblocking I/O.
82 * Revision 1.10 1995/03/14 17:00:07 quinn
83 * Bug-fixes - added tracing info to tcpip.c
85 * Revision 1.9 1995/03/14 10:28:42 quinn
86 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
88 * Revision 1.8 1995/03/10 14:22:50 quinn
89 * Removed debug output.
91 * Revision 1.7 1995/03/10 11:44:59 quinn
94 * Revision 1.6 1995/03/07 10:26:55 quinn
95 * Initialized type field in the comstacks.
97 * Revision 1.5 1995/02/14 20:40:07 quinn
100 * Revision 1.4 1995/02/14 11:54:49 quinn
101 * Beginning to add full CCL.
103 * Revision 1.3 1995/02/10 18:58:10 quinn
104 * Fixed tcpip_get (formerly tcpip_read).
105 * Turned tst (cli) into a proper, event-driven thingy.
107 * Revision 1.2 1995/02/10 15:55:47 quinn
110 * Revision 1.1 1995/02/09 15:51:52 quinn
124 #include <comstack.h>
127 int tcpip_close(COMSTACK h);
128 int tcpip_put(COMSTACK h, char *buf, int size);
129 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
130 int tcpip_connect(COMSTACK h, void *address);
131 int tcpip_more(COMSTACK h);
132 int tcpip_rcvconnect(COMSTACK h);
133 int tcpip_bind(COMSTACK h, void *address, int mode);
134 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
135 COMSTACK tcpip_accept(COMSTACK h);
136 char *tcpip_addrstr(COMSTACK h);
139 * Determine length/completeness of incoming packages
141 int completeBER(unsigned char *buf, int len); /* from the ODR module */
142 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
150 typedef struct tcpip_state
152 char *altbuf; /* alternate buffer for surplus data */
153 int altsize; /* size as xmalloced */
154 int altlen; /* length of data or 0 if none */
156 int written; /* -1 if we aren't writing */
157 int towrite; /* to verify against user input */
158 int (*complete)(unsigned char *buf, int len); /* length/completeness */
162 static int tcpip_init (void)
164 static int initialized = 0;
170 requested = MAKEWORD(1, 1);
171 if (WSAStartup(requested, &wd))
178 static int tcpip_init (void)
184 * This function is always called through the cs_create() macro.
185 * s >= 0: socket has already been established for us.
187 COMSTACK tcpip_type(int s, int blocking, int protocol)
193 unsigned long tru = 1;
195 struct protoent *proto;
203 if (!(proto = getprotobyname("tcp")))
205 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
207 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
214 if (!(p = xmalloc(sizeof(struct comstack))))
216 if (!(state = p->private = xmalloc(sizeof(tcpip_state))))
220 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
222 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
227 p->type = tcpip_type;
228 p->protocol = protocol;
230 p->f_connect = tcpip_connect;
231 p->f_rcvconnect = tcpip_rcvconnect;
232 p->f_get = tcpip_get;
233 p->f_put = tcpip_put;
234 p->f_close = tcpip_close;
235 p->f_more = tcpip_more;
236 p->f_bind = tcpip_bind;
237 p->f_listen = tcpip_listen;
238 p->f_accept = tcpip_accept;
239 p->f_addrstr = tcpip_addrstr;
241 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
247 state->altsize = state->altlen = 0;
248 state->towrite = state->written = -1;
249 if (protocol == PROTO_WAIS)
250 state->complete = completeWAIS;
252 state->complete = completeBER;
254 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
255 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
260 struct sockaddr_in *tcpip_strtoaddr(const char *str)
262 static struct sockaddr_in add;
265 short int port = 210;
270 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
271 add.sin_family = AF_INET;
273 if ((p = strchr(buf, ':')))
278 add.sin_port = htons(port);
279 if (!strcmp("@", buf))
280 add.sin_addr.s_addr = INADDR_ANY;
281 else if ((hp = gethostbyname(buf)))
282 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
283 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
284 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
290 int tcpip_more(COMSTACK h)
292 tcpip_state *sp = h->private;
294 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
299 * connect(2) will block (sometimes) - nothing we can do short of doing
300 * weird things like spawning subprocesses or threading or some weird junk
303 int tcpip_connect(COMSTACK h, void *address)
305 struct sockaddr_in *add = address;
307 TRC(fprintf(stderr, "tcpip_connect\n"));
308 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
311 if (WSAGetLastError() == WSAEWOULDBLOCK)
313 if (errno == EINPROGRESS)
318 h->state = CS_DATAXFER;
325 int tcpip_rcvconnect(COMSTACK h)
327 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
331 int tcpip_bind(COMSTACK h, void *address, int mode)
333 struct sockaddr *addr = address;
334 unsigned long one = 1;
336 TRC(fprintf(stderr, "tcpip_bind\n"));
337 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
342 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
347 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
356 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
358 struct sockaddr_in addr;
359 int len = sizeof(addr);
361 TRC(fprintf(stderr, "tcpip_listen\n"));
362 if (h->state != CS_IDLE)
364 h->cerrno = CSOUTSTATE;
367 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
370 if (WSAGetLastError() == WSAEWOULDBLOCK)
372 if (errno == EWOULDBLOCK)
375 h->cerrno = CSNODATA;
380 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
381 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
388 COMSTACK tcpip_accept(COMSTACK h)
391 tcpip_state *state, *st = h->private;
393 unsigned long tru = 1;
396 TRC(fprintf(stderr, "tcpip_accept\n"));
397 if (h->state != CS_INCON)
399 h->cerrno = CSOUTSTATE;
402 if (!(new = xmalloc(sizeof(*new))))
407 memcpy(new, h, sizeof(*h));
408 new->iofile = h->newfd;
409 if (!(state = new->private = xmalloc(sizeof(tcpip_state))))
415 if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
417 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
421 state->altsize = state->altlen = 0;
422 state->towrite = state->written = -1;
423 state->complete = st->complete;
424 new->state = CS_DATAXFER;
429 #define CS_TCPIP_BUFCHUNK 4096
432 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
433 * 0=connection closed.
435 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
437 tcpip_state *sp = h->private;
439 int tmpi, berlen, rest, req, tomove;
440 int hasread = 0, res;
442 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
443 if (sp->altlen) /* switch buffers */
445 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
446 (unsigned) sp->altbuf));
450 *bufsize = sp->altsize;
451 hasread = sp->altlen;
456 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
460 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
463 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
464 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
466 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
468 if (WSAGetLastError() == WSAEWOULDBLOCK)
470 if (errno == EWOULDBLOCK)
478 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
480 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
482 /* move surplus buffer (or everything if we didn't get a BER rec.) */
483 if (hasread > berlen)
485 tomove = req = hasread - berlen;
486 rest = tomove % CS_TCPIP_BUFCHUNK;
488 req += CS_TCPIP_BUFCHUNK - rest;
491 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
493 } else if (sp->altsize < req)
494 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
496 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
497 (unsigned) sp->altbuf));
498 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
500 if (berlen < CS_TCPIP_BUFCHUNK - 1)
501 *(*buf + berlen) = '\0';
502 return berlen ? berlen : 1;
507 * In nonblocking mode, you must call again with same buffer while
510 int tcpip_put(COMSTACK h, char *buf, int size)
513 struct tcpip_state *state = h->private;
515 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
516 if (state->towrite < 0)
518 state->towrite = size;
521 else if (state->towrite != size)
523 h->cerrno = CSWRONGBUF;
526 while (state->towrite > state->written)
528 if ((res = send(h->iofile, buf + state->written, size -
529 state->written, 0)) < 0)
532 if (WSAGetLastError() == WSAEWOULDBLOCK)
537 TRC(fprintf(stderr, " Flow control stop\n"));
543 state->written += res;
544 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
545 res, state->written, size));
547 state->towrite = state->written = -1;
548 TRC(fprintf(stderr, " Ok\n"));
552 int tcpip_close(COMSTACK h)
554 tcpip_state *sp = h->private;
556 TRC(fprintf(stderr, "tcpip_close\n"));
558 closesocket(h->iofile);
569 char *tcpip_addrstr(COMSTACK h)
571 struct sockaddr_in addr;
575 struct hostent *host;
578 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
583 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
585 r = (char*) host->h_name;
587 r = inet_ntoa(addr.sin_addr);
588 sprintf(buf, "tcp:%s", r);