2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.15 1997-05-14 06:53:33 adam
10 * Revision 1.14 1997/05/01 15:06:32 adam
11 * Moved WINSOCK init. code to tcpip_init routine.
13 * Revision 1.13 1996/11/01 08:45:18 adam
14 * Bug fix: used close on MS-Windows. Fixed to closesocket.
16 * Revision 1.12 1996/07/06 19:58:30 quinn
17 * System headerfiles gathered in yconfig
19 * Revision 1.11 1996/02/23 10:00:39 quinn
22 * Revision 1.10 1996/02/20 12:52:11 quinn
23 * WAIS protocol support.
25 * Revision 1.9 1996/02/10 12:23:11 quinn
26 * Enablie inetd operations fro TCP/IP stack
28 * Revision 1.8 1995/11/01 13:54:27 quinn
31 * Revision 1.7 1995/10/30 12:41:16 quinn
32 * Added hostname lookup for server.
34 * Revision 1.6 1995/09/29 17:12:00 quinn
37 * Revision 1.5 1995/09/29 17:01:48 quinn
40 * Revision 1.4 1995/09/28 10:12:26 quinn
41 * Windows-support changes
43 * Revision 1.3 1995/09/27 15:02:45 quinn
44 * Modified function heads & prototypes.
46 * Revision 1.2 1995/06/15 12:30:06 quinn
47 * Added @ as hostname alias for INADDR ANY.
49 * Revision 1.1 1995/06/14 09:58:20 quinn
50 * Renamed yazlib to comstack.
52 * Revision 1.20 1995/05/16 08:51:16 quinn
53 * License, documentation, and memory fixes
55 * Revision 1.19 1995/04/10 10:24:08 quinn
58 * Revision 1.18 1995/03/30 13:29:27 quinn
59 * Added REUSEADDR in tcpip_bind
61 * Revision 1.17 1995/03/27 08:36:10 quinn
62 * Some work on nonblocking operation in xmosi.c and rfct.c.
63 * Added protocol parameter to cs_create()
65 * Revision 1.16 1995/03/21 15:53:41 quinn
68 * Revision 1.15 1995/03/21 12:31:27 quinn
69 * Added check for EINPROGRESS on connect.
71 * Revision 1.14 1995/03/20 09:47:21 quinn
72 * Added server-side support to xmosi.c
73 * Fixed possible problems in rfct
76 * Revision 1.13 1995/03/15 16:15:13 adam
79 * Revision 1.12 1995/03/15 15:36:27 quinn
80 * Mods to support nonblocking I/O
82 * Revision 1.11 1995/03/15 08:37:57 quinn
83 * Now we're pretty much set for nonblocking I/O.
85 * Revision 1.10 1995/03/14 17:00:07 quinn
86 * Bug-fixes - added tracing info to tcpip.c
88 * Revision 1.9 1995/03/14 10:28:42 quinn
89 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
91 * Revision 1.8 1995/03/10 14:22:50 quinn
92 * Removed debug output.
94 * Revision 1.7 1995/03/10 11:44:59 quinn
97 * Revision 1.6 1995/03/07 10:26:55 quinn
98 * Initialized type field in the comstacks.
100 * Revision 1.5 1995/02/14 20:40:07 quinn
103 * Revision 1.4 1995/02/14 11:54:49 quinn
104 * Beginning to add full CCL.
106 * Revision 1.3 1995/02/10 18:58:10 quinn
107 * Fixed tcpip_get (formerly tcpip_read).
108 * Turned tst (cli) into a proper, event-driven thingy.
110 * Revision 1.2 1995/02/10 15:55:47 quinn
113 * Revision 1.1 1995/02/09 15:51:52 quinn
127 #include <comstack.h>
130 int tcpip_close(COMSTACK h);
131 int tcpip_put(COMSTACK h, char *buf, int size);
132 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
133 int tcpip_connect(COMSTACK h, void *address);
134 int tcpip_more(COMSTACK h);
135 int tcpip_rcvconnect(COMSTACK h);
136 int tcpip_bind(COMSTACK h, void *address, int mode);
137 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
138 COMSTACK tcpip_accept(COMSTACK h);
139 char *tcpip_addrstr(COMSTACK h);
142 * Determine length/completeness of incoming packages
144 int completeBER(unsigned char *buf, int len); /* from the ODR module */
145 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
153 typedef struct tcpip_state
155 char *altbuf; /* alternate buffer for surplus data */
156 int altsize; /* size as xmalloced */
157 int altlen; /* length of data or 0 if none */
159 int written; /* -1 if we aren't writing */
160 int towrite; /* to verify against user input */
161 int (*complete)(unsigned char *buf, int len); /* length/completeness */
165 static int tcpip_init (void)
167 static int initialized = 0;
173 requested = MAKEWORD(1, 1);
174 if (WSAStartup(requested, &wd))
181 static int tcpip_init (void)
187 * This function is always called through the cs_create() macro.
188 * s >= 0: socket has already been established for us.
190 COMSTACK tcpip_type(int s, int blocking, int protocol)
196 unsigned long tru = 1;
198 struct protoent *proto;
206 if (!(proto = getprotobyname("tcp")))
208 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
210 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
217 if (!(p = xmalloc(sizeof(struct comstack))))
219 if (!(state = p->cprivate = xmalloc(sizeof(tcpip_state))))
223 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
225 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
230 p->type = tcpip_type;
231 p->protocol = protocol;
233 p->f_connect = tcpip_connect;
234 p->f_rcvconnect = tcpip_rcvconnect;
235 p->f_get = tcpip_get;
236 p->f_put = tcpip_put;
237 p->f_close = tcpip_close;
238 p->f_more = tcpip_more;
239 p->f_bind = tcpip_bind;
240 p->f_listen = tcpip_listen;
241 p->f_accept = tcpip_accept;
242 p->f_addrstr = tcpip_addrstr;
244 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
250 state->altsize = state->altlen = 0;
251 state->towrite = state->written = -1;
252 if (protocol == PROTO_WAIS)
253 state->complete = completeWAIS;
255 state->complete = completeBER;
257 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
258 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
263 struct sockaddr_in *tcpip_strtoaddr(const char *str)
265 static struct sockaddr_in add;
268 short int port = 210;
273 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
274 add.sin_family = AF_INET;
276 if ((p = strchr(buf, ':')))
281 add.sin_port = htons(port);
282 if (!strcmp("@", buf))
283 add.sin_addr.s_addr = INADDR_ANY;
284 else if ((hp = gethostbyname(buf)))
285 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
286 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
287 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
293 int tcpip_more(COMSTACK h)
295 tcpip_state *sp = h->cprivate;
297 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
302 * connect(2) will block (sometimes) - nothing we can do short of doing
303 * weird things like spawning subprocesses or threading or some weird junk
306 int tcpip_connect(COMSTACK h, void *address)
308 struct sockaddr_in *add = address;
310 TRC(fprintf(stderr, "tcpip_connect\n"));
311 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
314 if (WSAGetLastError() == WSAEWOULDBLOCK)
316 if (errno == EINPROGRESS)
321 h->state = CS_DATAXFER;
328 int tcpip_rcvconnect(COMSTACK h)
330 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
334 int tcpip_bind(COMSTACK h, void *address, int mode)
336 struct sockaddr *addr = address;
337 unsigned long one = 1;
339 TRC(fprintf(stderr, "tcpip_bind\n"));
340 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
345 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
350 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
359 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
361 struct sockaddr_in addr;
362 int len = sizeof(addr);
364 TRC(fprintf(stderr, "tcpip_listen\n"));
365 if (h->state != CS_IDLE)
367 h->cerrno = CSOUTSTATE;
370 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
373 if (WSAGetLastError() == WSAEWOULDBLOCK)
375 if (errno == EWOULDBLOCK)
378 h->cerrno = CSNODATA;
383 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
384 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
391 COMSTACK tcpip_accept(COMSTACK h)
394 tcpip_state *state, *st = h->cprivate;
396 unsigned long tru = 1;
399 TRC(fprintf(stderr, "tcpip_accept\n"));
400 if (h->state != CS_INCON)
402 h->cerrno = CSOUTSTATE;
405 if (!(cnew = xmalloc(sizeof(*cnew))))
410 memcpy(cnew, h, sizeof(*h));
411 cnew->iofile = h->newfd;
412 if (!(state = cnew->cprivate = xmalloc(sizeof(tcpip_state))))
418 if (!cnew->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
420 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
424 state->altsize = state->altlen = 0;
425 state->towrite = state->written = -1;
426 state->complete = st->complete;
427 cnew->state = CS_DATAXFER;
432 #define CS_TCPIP_BUFCHUNK 4096
435 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
436 * 0=connection closed.
438 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
440 tcpip_state *sp = h->cprivate;
442 int tmpi, berlen, rest, req, tomove;
443 int hasread = 0, res;
445 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
446 if (sp->altlen) /* switch buffers */
448 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
449 (unsigned) sp->altbuf));
453 *bufsize = sp->altsize;
454 hasread = sp->altlen;
459 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
463 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
466 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
467 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
469 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
471 if (WSAGetLastError() == WSAEWOULDBLOCK)
473 if (errno == EWOULDBLOCK)
481 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
483 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
485 /* move surplus buffer (or everything if we didn't get a BER rec.) */
486 if (hasread > berlen)
488 tomove = req = hasread - berlen;
489 rest = tomove % CS_TCPIP_BUFCHUNK;
491 req += CS_TCPIP_BUFCHUNK - rest;
494 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
496 } else if (sp->altsize < req)
497 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
499 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
500 (unsigned) sp->altbuf));
501 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
503 if (berlen < CS_TCPIP_BUFCHUNK - 1)
504 *(*buf + berlen) = '\0';
505 return berlen ? berlen : 1;
510 * In nonblocking mode, you must call again with same buffer while
513 int tcpip_put(COMSTACK h, char *buf, int size)
516 struct tcpip_state *state = h->cprivate;
518 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
519 if (state->towrite < 0)
521 state->towrite = size;
524 else if (state->towrite != size)
526 h->cerrno = CSWRONGBUF;
529 while (state->towrite > state->written)
531 if ((res = send(h->iofile, buf + state->written, size -
532 state->written, 0)) < 0)
535 if (WSAGetLastError() == WSAEWOULDBLOCK)
540 TRC(fprintf(stderr, " Flow control stop\n"));
546 state->written += res;
547 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
548 res, state->written, size));
550 state->towrite = state->written = -1;
551 TRC(fprintf(stderr, " Ok\n"));
555 int tcpip_close(COMSTACK h)
557 tcpip_state *sp = h->cprivate;
559 TRC(fprintf(stderr, "tcpip_close\n"));
561 closesocket(h->iofile);
572 char *tcpip_addrstr(COMSTACK h)
574 struct sockaddr_in addr;
578 struct hostent *host;
581 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
586 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
588 r = (char*) host->h_name;
590 r = inet_ntoa(addr.sin_addr);
591 sprintf(buf, "tcp:%s", r);