2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.7 1995-10-30 12:41:16 quinn
8 * Added hostname lookup for server.
10 * Revision 1.6 1995/09/29 17:12:00 quinn
13 * Revision 1.5 1995/09/29 17:01:48 quinn
16 * Revision 1.4 1995/09/28 10:12:26 quinn
17 * Windows-support changes
19 * Revision 1.3 1995/09/27 15:02:45 quinn
20 * Modified function heads & prototypes.
22 * Revision 1.2 1995/06/15 12:30:06 quinn
23 * Added @ as hostname alias for INADDR ANY.
25 * Revision 1.1 1995/06/14 09:58:20 quinn
26 * Renamed yazlib to comstack.
28 * Revision 1.20 1995/05/16 08:51:16 quinn
29 * License, documentation, and memory fixes
31 * Revision 1.19 1995/04/10 10:24:08 quinn
34 * Revision 1.18 1995/03/30 13:29:27 quinn
35 * Added REUSEADDR in tcpip_bind
37 * Revision 1.17 1995/03/27 08:36:10 quinn
38 * Some work on nonblocking operation in xmosi.c and rfct.c.
39 * Added protocol parameter to cs_create()
41 * Revision 1.16 1995/03/21 15:53:41 quinn
44 * Revision 1.15 1995/03/21 12:31:27 quinn
45 * Added check for EINPROGRESS on connect.
47 * Revision 1.14 1995/03/20 09:47:21 quinn
48 * Added server-side support to xmosi.c
49 * Fixed possible problems in rfct
52 * Revision 1.13 1995/03/15 16:15:13 adam
55 * Revision 1.12 1995/03/15 15:36:27 quinn
56 * Mods to support nonblocking I/O
58 * Revision 1.11 1995/03/15 08:37:57 quinn
59 * Now we're pretty much set for nonblocking I/O.
61 * Revision 1.10 1995/03/14 17:00:07 quinn
62 * Bug-fixes - added tracing info to tcpip.c
64 * Revision 1.9 1995/03/14 10:28:42 quinn
65 * Adding server-side support to tcpip.c and fixing bugs in nonblocking I/O
67 * Revision 1.8 1995/03/10 14:22:50 quinn
68 * Removed debug output.
70 * Revision 1.7 1995/03/10 11:44:59 quinn
73 * Revision 1.6 1995/03/07 10:26:55 quinn
74 * Initialized type field in the comstacks.
76 * Revision 1.5 1995/02/14 20:40:07 quinn
79 * Revision 1.4 1995/02/14 11:54:49 quinn
80 * Beginning to add full CCL.
82 * Revision 1.3 1995/02/10 18:58:10 quinn
83 * Fixed tcpip_get (formerly tcpip_read).
84 * Turned tst (cli) into a proper, event-driven thingy.
86 * Revision 1.2 1995/02/10 15:55:47 quinn
89 * Revision 1.1 1995/02/09 15:51:52 quinn
101 #include <comstack.h>
105 #include <sys/time.h>
108 int tcpip_close(COMSTACK h);
109 int tcpip_put(COMSTACK h, char *buf, int size);
110 int tcpip_get(COMSTACK h, char **buf, int *bufsize);
111 int tcpip_connect(COMSTACK h, void *address);
112 int tcpip_more(COMSTACK h);
113 int tcpip_rcvconnect(COMSTACK h);
114 int tcpip_bind(COMSTACK h, void *address, int mode);
115 int tcpip_listen(COMSTACK h, char *addrp, int *addrlen);
116 COMSTACK tcpip_accept(COMSTACK h);
117 char *tcpip_addrstr(COMSTACK h);
119 int completeBER(unsigned char *buf, int len);
127 static int initialized = 0;
129 typedef struct tcpip_state
131 char *altbuf; /* alternate buffer for surplus data */
132 int altsize; /* size as malloced */
133 int altlen; /* length of data or 0 if none */
135 int written; /* -1 if we aren't writing */
136 int towrite; /* to verify against user input */
139 COMSTACK tcpip_type(int blocking, int protocol)
145 unsigned long tru = 1;
147 struct protoent *proto;
156 requested = MAKEWORD(1, 1);
157 if (WSAStartup(requested, &wd))
164 if (!(proto = getprotobyname("tcp")))
166 if ((s = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
168 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
171 if (!(p = malloc(sizeof(struct comstack))))
173 if (!(state = p->private = malloc(sizeof(tcpip_state))))
176 if (!(p->blocking = blocking) && ioctlsocket(s, FIONBIO, &tru) < 0)
178 if (!(p->blocking = blocking) && fcntl(s, F_SETFL, O_NONBLOCK) < 0)
182 p->type = tcpip_type;
183 p->protocol = protocol;
185 p->f_connect = tcpip_connect;
186 p->f_rcvconnect = tcpip_rcvconnect;
187 p->f_get = tcpip_get;
188 p->f_put = tcpip_put;
189 p->f_close = tcpip_close;
190 p->f_more = tcpip_more;
191 p->f_bind = tcpip_bind;
192 p->f_listen = tcpip_listen;
193 p->f_accept = tcpip_accept;
194 p->f_addrstr = tcpip_addrstr;
202 state->altsize = state->altlen = 0;
203 state->towrite = state->written = -1;
205 p->timeout = COMSTACK_DEFAULT_TIMEOUT;
206 TRC(fprintf(stderr, "Created new TCPIP comstack\n"));
211 struct sockaddr_in *tcpip_strtoaddr(const char *str)
213 static struct sockaddr_in add;
216 short int port = 210;
219 TRC(fprintf(stderr, "tcpip_strtoaddress: %s\n", str ? str : "NULL"));
220 add.sin_family = AF_INET;
222 if ((p = strchr(buf, ':')))
227 add.sin_port = htons(port);
228 if (!strcmp("@", buf))
229 add.sin_addr.s_addr = INADDR_ANY;
230 else if ((hp = gethostbyname(buf)))
231 memcpy(&add.sin_addr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
232 else if ((tmpadd = (unsigned) inet_addr(buf)) != 0)
233 memcpy(&add.sin_addr.s_addr, &tmpadd, sizeof(struct in_addr));
239 int tcpip_more(COMSTACK h)
241 tcpip_state *sp = h->private;
243 return sp->altlen && completeBER((unsigned char *) sp->altbuf, sp->altlen);
247 * connect(2) will block (sometimes) - nothing we can do short of doing
248 * weird things like spawning subprocesses or threading or some weird junk
251 int tcpip_connect(COMSTACK h, void *address)
253 struct sockaddr_in *add = address;
255 TRC(fprintf(stderr, "tcpip_connect\n"));
256 if (connect(h->iofile, (struct sockaddr *) add, sizeof(*add)) < 0)
259 if (WSAGetLastError() == WSAEWOULDBLOCK)
261 if (errno == EINPROGRESS)
266 h->state = CS_DATAXFER;
273 int tcpip_rcvconnect(COMSTACK h)
275 TRC(fprintf(stderr, "tcpip_rcvconnect\n"));
279 int tcpip_bind(COMSTACK h, void *address, int mode)
281 struct sockaddr *addr = address;
282 unsigned long one = 1;
284 TRC(fprintf(stderr, "tcpip_bind\n"));
285 if (setsockopt(h->iofile, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
290 if (bind(h->iofile, addr, sizeof(struct sockaddr_in)) < 0)
295 if (mode == CS_SERVER && listen(h->iofile, 3) < 0)
304 int tcpip_listen(COMSTACK h, char *raddr, int *addrlen)
306 struct sockaddr_in addr;
307 int len = sizeof(addr);
309 TRC(fprintf(stderr, "tcpip_listen\n"));
310 if (h->state != CS_IDLE)
312 h->cerrno = CSOUTSTATE;
315 if ((h->newfd = accept(h->iofile, (struct sockaddr*)&addr, &len)) < 0)
318 if (WSAGetLastError() == WSAEWOULDBLOCK)
320 if (errno == EWOULDBLOCK)
323 h->cerrno = CSNODATA;
328 if (addrlen && *addrlen > sizeof(struct sockaddr_in))
329 memcpy(raddr, &addr, *addrlen = sizeof(struct sockaddr_in));
336 COMSTACK tcpip_accept(COMSTACK h)
341 unsigned long tru = 1;
344 TRC(fprintf(stderr, "tcpip_accept\n"));
345 if (h->state != CS_INCON)
347 h->cerrno = CSOUTSTATE;
350 if (!(new = malloc(sizeof(*new))))
355 memcpy(new, h, sizeof(*h));
356 new->iofile = h->newfd;
357 if (!(state = new->private = malloc(sizeof(tcpip_state))))
363 if (!new->blocking && ioctlsocket(new->iofile, FIONBIO, &tru) < 0)
365 if (!new->blocking && fcntl(new->iofile, F_SETFL, O_NONBLOCK) < 0)
369 state->altsize = state->altlen = 0;
370 state->towrite = state->written = -1;
371 new->state = CS_DATAXFER;
376 #define CS_TCPIP_BUFCHUNK 4096
379 * Return: -1 error, >1 good, len of buffer, ==1 incomplete buffer,
380 * 0=connection closed.
382 int tcpip_get(COMSTACK h, char **buf, int *bufsize)
384 tcpip_state *sp = h->private;
386 int tmpi, berlen, rest, req, tomove;
387 int hasread = 0, res;
389 TRC(fprintf(stderr, "tcpip_get: bufsize=%d\n", *bufsize));
390 if (sp->altlen) /* switch buffers */
392 TRC(fprintf(stderr, " %d bytes in altbuf (0x%x)\n", sp->altlen,
393 (unsigned) sp->altbuf));
397 *bufsize = sp->altsize;
398 hasread = sp->altlen;
403 while (!(berlen = completeBER((unsigned char *)*buf, hasread)))
407 if (!(*buf = malloc(*bufsize = CS_TCPIP_BUFCHUNK)))
410 else if (*bufsize - hasread < CS_TCPIP_BUFCHUNK)
411 if (!(*buf = realloc(*buf, *bufsize *= 2)))
413 if ((res = recv(h->iofile, *buf + hasread, CS_TCPIP_BUFCHUNK, 0)) < 0)
415 if (WSAGetLastError() == WSAEWOULDBLOCK)
417 if (errno == EWOULDBLOCK)
425 TRC(fprintf(stderr, " res=%d, hasread=%d\n", res, hasread));
427 TRC(fprintf(stderr, " Out of read loop with hasread=%d, berlen=%d\n",
429 /* move surplus buffer (or everything if we didn't get a BER rec.) */
430 if (hasread > berlen)
432 tomove = req = hasread - berlen;
433 rest = tomove % CS_TCPIP_BUFCHUNK;
435 req += CS_TCPIP_BUFCHUNK - rest;
438 if (!(sp->altbuf = malloc(sp->altsize = req)))
440 } else if (sp->altsize < req)
441 if (!(sp->altbuf = realloc(sp->altbuf, sp->altsize = req)))
443 TRC(fprintf(stderr, " Moving %d bytes to altbuf(0x%x)\n", tomove,
444 (unsigned) sp->altbuf));
445 memcpy(sp->altbuf, *buf + berlen, sp->altlen = tomove);
447 if (berlen < CS_TCPIP_BUFCHUNK - 1)
448 *(*buf + berlen) = '\0';
449 return berlen ? berlen : 1;
454 * In nonblocking mode, you must call again with same buffer while
457 int tcpip_put(COMSTACK h, char *buf, int size)
460 struct tcpip_state *state = h->private;
462 TRC(fprintf(stderr, "tcpip_put: size=%d\n", size));
463 if (state->towrite < 0)
465 state->towrite = size;
468 else if (state->towrite != size)
470 h->cerrno = CSWRONGBUF;
473 while (state->towrite > state->written)
475 if ((res = send(h->iofile, buf + state->written, size -
476 state->written, 0)) < 0)
479 if (WSAGetLastError() == WSAEWOULDBLOCK)
484 TRC(fprintf(stderr, " Flow control stop\n"));
490 state->written += res;
491 TRC(fprintf(stderr, " Wrote %d, written=%d, nbytes=%d\n",
492 res, state->written, size));
494 state->towrite = state->written = -1;
495 TRC(fprintf(stderr, " Ok\n"));
499 int tcpip_close(COMSTACK h)
501 tcpip_state *sp = h->private;
503 TRC(fprintf(stderr, "tcpip_close\n"));
512 char *tcpip_addrstr(COMSTACK h)
514 struct sockaddr_in addr;
518 struct hostent *host;
521 if (getpeername(h->iofile, (struct sockaddr*) &addr, &len) < 0)
526 if ((host = gethostbyaddr((char*)&addr.sin_addr, sizeof(addr.sin_addr),
528 r = (char*) host->h_name;
530 r = inet_ntoa(addr.sin_addr);
531 sprintf(buf, "tcp:%s", r);