2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.13 1996-11-01 08:45:18 adam
8 * Bug fix: used close on MS-Windows. Fixed to closesocket.
10 * Revision 1.12 1996/07/06 19:58:30 quinn
11 * System headerfiles gathered in yconfig
13 * Revision 1.11 1996/02/23 10:00:39 quinn
16 * Revision 1.10 1996/02/20 12:52:11 quinn
17 * WAIS protocol support.
19 * Revision 1.9 1996/02/10 12:23:11 quinn
20 * Enablie inetd operations fro TCP/IP stack
22 * Revision 1.8 1995/11/01 13:54:27 quinn
25 * Revision 1.7 1995/10/30 12:41:16 quinn
26 * Added hostname lookup for server.
28 * Revision 1.6 1995/09/29 17:12:00 quinn
31 * Revision 1.5 1995/09/29 17:01:48 quinn
34 * Revision 1.4 1995/09/28 10:12:26 quinn
35 * Windows-support changes
37 * Revision 1.3 1995/09/27 15:02:45 quinn
38 * Modified function heads & prototypes.
40 * Revision 1.2 1995/06/15 12:30:06 quinn
41 * Added @ as hostname alias for INADDR ANY.
43 * Revision 1.1 1995/06/14 09:58:20 quinn
44 * Renamed yazlib to comstack.
46 * Revision 1.20 1995/05/16 08:51:16 quinn
47 * License, documentation, and memory fixes
49 * Revision 1.19 1995/04/10 10:24:08 quinn
52 * Revision 1.18 1995/03/30 13:29:27 quinn
53 * Added REUSEADDR in tcpip_bind
55 * Revision 1.17 1995/03/27 08:36:10 quinn
56 * Some work on nonblocking operation in xmosi.c and rfct.c.
57 * Added protocol parameter to cs_create()
59 * Revision 1.16 1995/03/21 15:53:41 quinn
62 * Revision 1.15 1995/03/21 12:31:27 quinn
63 * Added check for EINPROGRESS on connect.
65 * Revision 1.14 1995/03/20 09:47:21 quinn
66 * Added server-side support to xmosi.c
67 * Fixed possible problems in rfct
70 * Revision 1.13 1995/03/15 16:15:13 adam
73 * Revision 1.12 1995/03/15 15:36:27 quinn
74 * Mods to support nonblocking I/O
76 * Revision 1.11 1995/03/15 08:37:57 quinn
77 * Now we're pretty much set for nonblocking I/O.
79 * Revision 1.10 1995/03/14 17:00:07 quinn
80 * Bug-fixes - added tracing info to tcpip.c
82 * Revision 1.9 1995/03/14 10:28:42 quinn
83 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
85 * Revision 1.8 1995/03/10 14:22:50 quinn
86 * Removed debug output.
88 * Revision 1.7 1995/03/10 11:44:59 quinn
91 * Revision 1.6 1995/03/07 10:26:55 quinn
92 * Initialized type field in the comstacks.
94 * Revision 1.5 1995/02/14 20:40:07 quinn
97 * Revision 1.4 1995/02/14 11:54:49 quinn
98 * Beginning to add full CCL.
100 * Revision 1.3 1995/02/10 18:58:10 quinn
101 * Fixed tcpip_get (formerly tcpip_read).
102 * Turned tst (cli) into a proper, event-driven thingy.
104 * Revision 1.2 1995/02/10 15:55:47 quinn
107 * Revision 1.1 1995/02/09 15:51:52 quinn
119 #include <comstack.h>
122 int tcpip_close(COMSTACK h);
123 int tcpip_put(COMSTACK h, char *buf, int size);
124 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
125 int tcpip_connect(COMSTACK h, void *address);
126 int tcpip_more(COMSTACK h);
127 int tcpip_rcvconnect(COMSTACK h);
128 int tcpip_bind(COMSTACK h, void *address, int mode);
129 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
130 COMSTACK tcpip_accept(COMSTACK h);
131 char *tcpip_addrstr(COMSTACK h);
134 * Determine length/completeness of incoming packages
136 int completeBER(unsigned char *buf, int len); /* from the ODR module */
137 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
145 static int initialized = 0;
147 typedef struct tcpip_state
149 char *altbuf; /* alternate buffer for surplus data */
150 int altsize; /* size as xmalloced */
151 int altlen; /* length of data or 0 if none */
153 int written; /* -1 if we aren't writing */
154 int towrite; /* to verify against user input */
155 int (*complete)(unsigned char *buf, int len); /* length/completeness */
159 * This function is always called through the cs_create() macro.
160 * s >= 0: socket has already been established for us.
162 COMSTACK tcpip_type(int s, int blocking, int protocol)
168 unsigned long tru = 1;
170 struct protoent *proto;
179 requested = MAKEWORD(1, 1);
180 if (WSAStartup(requested, &wd))
189 if (!(proto = getprotobyname("tcp")))
191 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
193 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
200 if (!(p = xmalloc(sizeof(struct comstack))))
202 if (!(state = p->private = xmalloc(sizeof(tcpip_state))))
206 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
208 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
213 p->type = tcpip_type;
214 p->protocol = protocol;
216 p->f_connect = tcpip_connect;
217 p->f_rcvconnect = tcpip_rcvconnect;
218 p->f_get = tcpip_get;
219 p->f_put = tcpip_put;
220 p->f_close = tcpip_close;
221 p->f_more = tcpip_more;
222 p->f_bind = tcpip_bind;
223 p->f_listen = tcpip_listen;
224 p->f_accept = tcpip_accept;
225 p->f_addrstr = tcpip_addrstr;
227 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
233 state->altsize = state->altlen = 0;
234 state->towrite = state->written = -1;
235 if (protocol == PROTO_WAIS)
236 state->complete = completeWAIS;
238 state->complete = completeBER;
240 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
241 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
246 struct sockaddr_in *tcpip_strtoaddr(const char *str)
248 static struct sockaddr_in add;
251 short int port = 210;
254 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
255 add.sin_family = AF_INET;
257 if ((p = strchr(buf, ':')))
262 add.sin_port = htons(port);
263 if (!strcmp("@", buf))
264 add.sin_addr.s_addr = INADDR_ANY;
265 else if ((hp = gethostbyname(buf)))
266 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
267 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
268 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
274 int tcpip_more(COMSTACK h)
276 tcpip_state *sp = h->private;
278 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
283 * connect(2) will block (sometimes) - nothing we can do short of doing
284 * weird things like spawning subprocesses or threading or some weird junk
287 int tcpip_connect(COMSTACK h, void *address)
289 struct sockaddr_in *add = address;
291 TRC(fprintf(stderr, "tcpip_connect\n"));
292 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
295 if (WSAGetLastError() == WSAEWOULDBLOCK)
297 if (errno == EINPROGRESS)
302 h->state = CS_DATAXFER;
309 int tcpip_rcvconnect(COMSTACK h)
311 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
315 int tcpip_bind(COMSTACK h, void *address, int mode)
317 struct sockaddr *addr = address;
318 unsigned long one = 1;
320 TRC(fprintf(stderr, "tcpip_bind\n"));
321 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
326 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
331 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
340 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
342 struct sockaddr_in addr;
343 int len = sizeof(addr);
345 TRC(fprintf(stderr, "tcpip_listen\n"));
346 if (h->state != CS_IDLE)
348 h->cerrno = CSOUTSTATE;
351 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
354 if (WSAGetLastError() == WSAEWOULDBLOCK)
356 if (errno == EWOULDBLOCK)
359 h->cerrno = CSNODATA;
364 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
365 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
372 COMSTACK tcpip_accept(COMSTACK h)
375 tcpip_state *state, *st = h->private;
377 unsigned long tru = 1;
380 TRC(fprintf(stderr, "tcpip_accept\n"));
381 if (h->state != CS_INCON)
383 h->cerrno = CSOUTSTATE;
386 if (!(new = xmalloc(sizeof(*new))))
391 memcpy(new, h, sizeof(*h));
392 new->iofile = h->newfd;
393 if (!(state = new->private = xmalloc(sizeof(tcpip_state))))
399 if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
401 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
405 state->altsize = state->altlen = 0;
406 state->towrite = state->written = -1;
407 state->complete = st->complete;
408 new->state = CS_DATAXFER;
413 #define CS_TCPIP_BUFCHUNK 4096
416 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
417 * 0=connection closed.
419 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
421 tcpip_state *sp = h->private;
423 int tmpi, berlen, rest, req, tomove;
424 int hasread = 0, res;
426 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
427 if (sp->altlen) /* switch buffers */
429 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
430 (unsigned) sp->altbuf));
434 *bufsize = sp->altsize;
435 hasread = sp->altlen;
440 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
444 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
447 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
448 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
450 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
452 if (WSAGetLastError() == WSAEWOULDBLOCK)
454 if (errno == EWOULDBLOCK)
462 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
464 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
466 /* move surplus buffer (or everything if we didn't get a BER rec.) */
467 if (hasread > berlen)
469 tomove = req = hasread - berlen;
470 rest = tomove % CS_TCPIP_BUFCHUNK;
472 req += CS_TCPIP_BUFCHUNK - rest;
475 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
477 } else if (sp->altsize < req)
478 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
480 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
481 (unsigned) sp->altbuf));
482 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
484 if (berlen < CS_TCPIP_BUFCHUNK - 1)
485 *(*buf + berlen) = '\0';
486 return berlen ? berlen : 1;
491 * In nonblocking mode, you must call again with same buffer while
494 int tcpip_put(COMSTACK h, char *buf, int size)
497 struct tcpip_state *state = h->private;
499 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
500 if (state->towrite < 0)
502 state->towrite = size;
505 else if (state->towrite != size)
507 h->cerrno = CSWRONGBUF;
510 while (state->towrite > state->written)
512 if ((res = send(h->iofile, buf + state->written, size -
513 state->written, 0)) < 0)
516 if (WSAGetLastError() == WSAEWOULDBLOCK)
521 TRC(fprintf(stderr, " Flow control stop\n"));
527 state->written += res;
528 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
529 res, state->written, size));
531 state->towrite = state->written = -1;
532 TRC(fprintf(stderr, " Ok\n"));
536 int tcpip_close(COMSTACK h)
538 tcpip_state *sp = h->private;
540 TRC(fprintf(stderr, "tcpip_close\n"));
542 closesocket(h->iofile);
553 char *tcpip_addrstr(COMSTACK h)
555 struct sockaddr_in addr;
559 struct hostent *host;
562 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
567 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
569 r = (char*) host->h_name;
571 r = inet_ntoa(addr.sin_addr);
572 sprintf(buf, "tcp:%s", r);