2 * Copyright (c) 1995-1997, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.18 1997-09-29 07:15:25 adam
8 * Changed use of setsockopt to avoid warnings on MSVC.
10 * Revision 1.17 1997/09/17 12:10:30 adam
13 * Revision 1.16 1997/09/01 08:49:14 adam
14 * New windows NT/95 port using MSV5.0. Minor changes only.
16 * Revision 1.15 1997/05/14 06:53:33 adam
19 * Revision 1.14 1997/05/01 15:06:32 adam
20 * Moved WINSOCK init. code to tcpip_init routine.
22 * Revision 1.13 1996/11/01 08:45:18 adam
23 * Bug fix: used close on MS-Windows. Fixed to closesocket.
25 * Revision 1.12 1996/07/06 19:58:30 quinn
26 * System headerfiles gathered in yconfig
28 * Revision 1.11 1996/02/23 10:00:39 quinn
31 * Revision 1.10 1996/02/20 12:52:11 quinn
32 * WAIS protocol support.
34 * Revision 1.9 1996/02/10 12:23:11 quinn
35 * Enablie inetd operations fro TCP/IP stack
37 * Revision 1.8 1995/11/01 13:54:27 quinn
40 * Revision 1.7 1995/10/30 12:41:16 quinn
41 * Added hostname lookup for server.
43 * Revision 1.6 1995/09/29 17:12:00 quinn
46 * Revision 1.5 1995/09/29 17:01:48 quinn
49 * Revision 1.4 1995/09/28 10:12:26 quinn
50 * Windows-support changes
52 * Revision 1.3 1995/09/27 15:02:45 quinn
53 * Modified function heads & prototypes.
55 * Revision 1.2 1995/06/15 12:30:06 quinn
56 * Added @ as hostname alias for INADDR ANY.
58 * Revision 1.1 1995/06/14 09:58:20 quinn
59 * Renamed yazlib to comstack.
61 * Revision 1.20 1995/05/16 08:51:16 quinn
62 * License, documentation, and memory fixes
64 * Revision 1.19 1995/04/10 10:24:08 quinn
67 * Revision 1.18 1995/03/30 13:29:27 quinn
68 * Added REUSEADDR in tcpip_bind
70 * Revision 1.17 1995/03/27 08:36:10 quinn
71 * Some work on nonblocking operation in xmosi.c and rfct.c.
72 * Added protocol parameter to cs_create()
74 * Revision 1.16 1995/03/21 15:53:41 quinn
77 * Revision 1.15 1995/03/21 12:31:27 quinn
78 * Added check for EINPROGRESS on connect.
80 * Revision 1.14 1995/03/20 09:47:21 quinn
81 * Added server-side support to xmosi.c
82 * Fixed possible problems in rfct
85 * Revision 1.13 1995/03/15 16:15:13 adam
88 * Revision 1.12 1995/03/15 15:36:27 quinn
89 * Mods to support nonblocking I/O
91 * Revision 1.11 1995/03/15 08:37:57 quinn
92 * Now we're pretty much set for nonblocking I/O.
94 * Revision 1.10 1995/03/14 17:00:07 quinn
95 * Bug-fixes - added tracing info to tcpip.c
97 * Revision 1.9 1995/03/14 10:28:42 quinn
98 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
100 * Revision 1.8 1995/03/10 14:22:50 quinn
101 * Removed debug output.
103 * Revision 1.7 1995/03/10 11:44:59 quinn
104 * Fixes and debugging
106 * Revision 1.6 1995/03/07 10:26:55 quinn
107 * Initialized type field in the comstacks.
109 * Revision 1.5 1995/02/14 20:40:07 quinn
112 * Revision 1.4 1995/02/14 11:54:49 quinn
113 * Beginning to add full CCL.
115 * Revision 1.3 1995/02/10 18:58:10 quinn
116 * Fixed tcpip_get (formerly tcpip_read).
117 * Turned tst (cli) into a proper, event-driven thingy.
119 * Revision 1.2 1995/02/10 15:55:47 quinn
122 * Revision 1.1 1995/02/09 15:51:52 quinn
136 #include <comstack.h>
139 int tcpip_close(COMSTACK h);
140 int tcpip_put(COMSTACK h, char *buf, int size);
141 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
142 int tcpip_connect(COMSTACK h, void *address);
143 int tcpip_more(COMSTACK h);
144 int tcpip_rcvconnect(COMSTACK h);
145 int tcpip_bind(COMSTACK h, void *address, int mode);
146 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
147 COMSTACK tcpip_accept(COMSTACK h);
148 char *tcpip_addrstr(COMSTACK h);
149 void *tcpip_straddr(COMSTACK h, const char *str);
152 * Determine length/completeness of incoming packages
154 int completeBER(unsigned char *buf, int len); /* from the ODR module */
155 int completeWAIS(unsigned char *buf, int len); /* from waislen.c */
163 typedef struct tcpip_state
165 char *altbuf; /* alternate buffer for surplus data */
166 int altsize; /* size as xmalloced */
167 int altlen; /* length of data or 0 if none */
169 int written; /* -1 if we aren't writing */
170 int towrite; /* to verify against user input */
171 int (*complete)(unsigned char *buf, int len); /* length/completeness */
172 struct sockaddr_in addr; /* returned by cs_straddr */
173 char buf[128]; /* returned by cs_addrstr */
177 static int tcpip_init (void)
179 static int initialized = 0;
185 requested = MAKEWORD(1, 1);
186 if (WSAStartup(requested, &wd))
193 static int tcpip_init (void)
199 * This function is always called through the cs_create() macro.
200 * s >= 0: socket has already been established for us.
202 COMSTACK tcpip_type(int s, int blocking, int protocol)
208 unsigned long tru = 1;
210 struct protoent *proto;
218 if (!(proto = getprotobyname("tcp")))
220 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
222 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
229 if (!(p = xmalloc(sizeof(struct comstack))))
231 if (!(state = p->cprivate = xmalloc(sizeof(tcpip_state))))
235 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
237 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
242 p->type = tcpip_type;
243 p->protocol = protocol;
245 p->f_connect = tcpip_connect;
246 p->f_rcvconnect = tcpip_rcvconnect;
247 p->f_get = tcpip_get;
248 p->f_put = tcpip_put;
249 p->f_close = tcpip_close;
250 p->f_more = tcpip_more;
251 p->f_bind = tcpip_bind;
252 p->f_listen = tcpip_listen;
253 p->f_accept = tcpip_accept;
254 p->f_addrstr = tcpip_addrstr;
255 p->f_straddr = tcpip_straddr;
257 p->state = new_socket ? CS_UNBND : CS_IDLE; /* state of line */
263 state->altsize = state->altlen = 0;
264 state->towrite = state->written = -1;
265 if (protocol == PROTO_WAIS)
266 state->complete = completeWAIS;
268 state->complete = completeBER;
270 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
271 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
276 static int tcpip_strtoaddr_ex(const char *str, struct sockaddr_in *add)
280 short int port = 210;
285 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
286 add->sin_family = AF_INET;
288 if ((p = strchr(buf, ':')))
293 add->sin_port = htons(port);
294 if (!strcmp("@", buf))
295 add->sin_addr.s_addr = INADDR_ANY;
296 else if ((hp = gethostbyname(buf)))
297 memcpy(&add->sin_addr.s_addr, *hp->h_addr_list,
298 sizeof(struct in_addr));
299 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
300 memcpy(&add->sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
306 void *tcpip_straddr(COMSTACK h, const char *str)
308 tcpip_state *sp = h->cprivate;
310 if (!tcpip_strtoaddr_ex (str, &sp->addr))
315 struct sockaddr_in *tcpip_strtoaddr(const char *str)
317 static struct sockaddr_in add;
319 if (!tcpip_strtoaddr_ex (str, &add))
324 int tcpip_more(COMSTACK h)
326 tcpip_state *sp = h->cprivate;
328 return sp->altlen && (*sp->complete)((unsigned char *) sp->altbuf,
333 * connect(2) will block (sometimes) - nothing we can do short of doing
334 * weird things like spawning subprocesses or threading or some weird junk
337 int tcpip_connect(COMSTACK h, void *address)
339 struct sockaddr_in *add = address;
341 TRC(fprintf(stderr, "tcpip_connect\n"));
342 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
345 if (WSAGetLastError() == WSAEWOULDBLOCK)
347 if (errno == EINPROGRESS)
352 h->state = CS_DATAXFER;
359 int tcpip_rcvconnect(COMSTACK h)
361 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
365 int tcpip_bind(COMSTACK h, void *address, int mode)
367 struct sockaddr *addr = address;
371 unsigned long one = 1;
374 TRC(fprintf(stderr, "tcpip_bind\n"));
375 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, (void*)
376 &one, sizeof(one)) < 0)
381 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
386 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
395 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
397 struct sockaddr_in addr;
398 int len = sizeof(addr);
400 TRC(fprintf(stderr, "tcpip_listen\n"));
401 if (h->state != CS_IDLE)
403 h->cerrno = CSOUTSTATE;
406 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
409 if (WSAGetLastError() == WSAEWOULDBLOCK)
411 if (errno == EWOULDBLOCK)
414 h->cerrno = CSNODATA;
419 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
420 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
427 COMSTACK tcpip_accept(COMSTACK h)
430 tcpip_state *state, *st = h->cprivate;
432 unsigned long tru = 1;
435 TRC(fprintf(stderr, "tcpip_accept\n"));
436 if (h->state != CS_INCON)
438 h->cerrno = CSOUTSTATE;
441 if (!(cnew = xmalloc(sizeof(*cnew))))
446 memcpy(cnew, h, sizeof(*h));
447 cnew->iofile = h->newfd;
448 if (!(state = cnew->cprivate = xmalloc(sizeof(tcpip_state))))
454 if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
456 if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
460 state->altsize = state->altlen = 0;
461 state->towrite = state->written = -1;
462 state->complete = st->complete;
463 cnew->state = CS_DATAXFER;
468 #define CS_TCPIP_BUFCHUNK 4096
471 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
472 * 0=connection closed.
474 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
476 tcpip_state *sp = h->cprivate;
478 int tmpi, berlen, rest, req, tomove;
479 int hasread = 0, res;
481 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
482 if (sp->altlen) /* switch buffers */
484 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
485 (unsigned) sp->altbuf));
489 *bufsize = sp->altsize;
490 hasread = sp->altlen;
495 while (!(berlen = (*sp->complete)((unsigned char *)*buf, hasread)))
499 if (!(*buf = xmalloc(*bufsize = CS_TCPIP_BUFCHUNK)))
502 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
503 if (!(*buf =xrealloc(*buf, *bufsize *= 2)))
505 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
507 if (WSAGetLastError() == WSAEWOULDBLOCK)
509 if (errno == EWOULDBLOCK)
517 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
519 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
521 /* move surplus buffer (or everything if we didn't get a BER rec.) */
522 if (hasread > berlen)
524 tomove = req = hasread - berlen;
525 rest = tomove % CS_TCPIP_BUFCHUNK;
527 req += CS_TCPIP_BUFCHUNK - rest;
530 if (!(sp->altbuf = xmalloc(sp->altsize = req)))
532 } else if (sp->altsize < req)
533 if (!(sp->altbuf =xrealloc(sp->altbuf, sp->altsize = req)))
535 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
536 (unsigned) sp->altbuf));
537 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
539 if (berlen < CS_TCPIP_BUFCHUNK - 1)
540 *(*buf + berlen) = '\0';
541 return berlen ? berlen : 1;
546 * In nonblocking mode, you must call again with same buffer while
549 int tcpip_put(COMSTACK h, char *buf, int size)
552 struct tcpip_state *state = h->cprivate;
554 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
555 if (state->towrite < 0)
557 state->towrite = size;
560 else if (state->towrite != size)
562 h->cerrno = CSWRONGBUF;
565 while (state->towrite > state->written)
567 if ((res = send(h->iofile, buf + state->written, size -
568 state->written, 0)) < 0)
571 if (WSAGetLastError() == WSAEWOULDBLOCK)
576 TRC(fprintf(stderr, " Flow control stop\n"));
582 state->written += res;
583 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
584 res, state->written, size));
586 state->towrite = state->written = -1;
587 TRC(fprintf(stderr, " Ok\n"));
591 int tcpip_close(COMSTACK h)
593 tcpip_state *sp = h->cprivate;
595 TRC(fprintf(stderr, "tcpip_close\n"));
598 closesocket(h->iofile);
609 char *tcpip_addrstr(COMSTACK h)
611 struct sockaddr_in addr;
612 tcpip_state *sp = h->cprivate;
613 char *r, *buf = sp->buf;
615 struct hostent *host;
618 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
623 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
625 r = (char*) host->h_name;
627 r = inet_ntoa(addr.sin_addr);
628 sprintf(buf, "tcp:%s", r);