Annotation of libwww/Library/src/HTTCP.c, revision 2.99
2.31 frystyk 1: /* HTTCP.c
2.83 frystyk 2: ** TCP SPECIFIC CODE
2.31 frystyk 3: **
2.42 frystyk 4: ** (c) COPYRIGHT MIT 1995.
2.31 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
2.99 ! frystyk 6: ** @(#) $Id: HTTCP.c,v 2.98 1996/12/07 15:55:55 frystyk Exp $
1.1 timbl 7: **
8: ** This code is in common between client and server sides.
9: **
10: ** 16 Jan 92 TBL Fix strtol() undefined on CMU Mach.
11: ** 25 Jun 92 JFG Added DECNET option through TCP socket emulation.
2.7 duns 12: ** 13 Sep 93 MD Added correct return of vmserrorno for HTInetStatus.
13: ** Added decoding of vms error message for MULTINET.
2.13 frystyk 14: ** 31 May 94 HF Added cache on host id's; now use inet_ntoa() to
15: ** HTInetString and some other fixes. Added HTDoConnect
16: ** and HTDoAccept
1.1 timbl 17: */
18:
2.36 frystyk 19: /* Library include files */
2.79 frystyk 20: #include "sysdep.h"
2.83 frystyk 21: #include "WWWUtil.h"
22: #include "WWWCore.h"
2.95 frystyk 23: #include "WWWMux.h"
2.83 frystyk 24:
2.58 frystyk 25: #include "HTReqMan.h"
2.54 frystyk 26: #include "HTNetMan.h"
2.36 frystyk 27: #include "HTTCP.h" /* Implemented here */
2.29 frystyk 28:
2.95 frystyk 29: #include "HTHstMan.h"
30:
2.36 frystyk 31: /* VMS stuff */
32: #ifdef VMS
33: #ifndef MULTINET
34: #define FD_SETSIZE 32
35: #else /* Multinet */
36: #define FD_SETSIZE 256
37: #endif /* Multinet */
38: #endif /* VMS */
39:
2.13 frystyk 40: /* Macros and other defines */
2.24 frystyk 41: /* x seconds penalty on a multi-homed host if IP-address is down */
42: #define TCP_PENALTY 1200
43:
44: /* x seconds penalty on a multi-homed host if IP-address is timed out */
45: #define TCP_DELAY 600
46:
2.93 eric 47: /* imperical study in socket call error codes
48: */
49: #ifdef _WINSOCKAPI_ /* windows */
50: #define NETCALL_ERROR(ret) (ret == SOCKET_ERROR)
51: #define NETCALL_DEADSOCKET(err) (err == WSAEBADF)
52: #define NETCALL_WOULDBLOCK(err) (err == WSAEWOULDBLOCK)
53: #else /* _WINSOCKAPI_ unix */
54: #define NETCALL_ERROR(ret) (ret < 0)
55: #define NETCALL_DEADSOCKET(err) (err == EBADF)
56: #if defined(EAGAIN) && defined(EALREADY)
57: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS || \
58: err == EALREADY || \
59: err == EAGAIN)
60: #else /* (EAGAIN && EALREADY) */
61: #ifdef EALREADY
62: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS || err == EALREADY)
63: #else /* EALREADY */
64: #ifdef EAGAIN
65: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS || err == EAGAIN)
66: #else /* EAGAIN */
67: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS)
68: #endif /* !EAGAIN */
69: #endif /* !EALREADY */
70: #endif /* !(EAGAIN && EALREADY) */
71: #endif /* !_WINSOCKAPI_ done */
2.13 frystyk 72: /* ------------------------------------------------------------------------- */
2.19 frystyk 73: /* CONNECTION ESTABLISHMENT MANAGEMENT */
74: /* ------------------------------------------------------------------------- */
2.13 frystyk 75:
2.95 frystyk 76: /* _makeSocket - create a socket, if !preemptive, set FIONBIO
2.93 eric 77: * returns 1: blocking
78: * 0: non-blocking
79: * -1: creation error
80: */
2.95 frystyk 81: PRIVATE int _makeSocket(HTHost * host, HTRequest * request, int preemptive, HTTransport * transport)
2.93 eric 82: {
2.95 frystyk 83: int status = 1;
84: SOCKET sockfd;
2.93 eric 85: #ifdef DECNET
2.95 frystyk 86: if ((sockfd=socket(AF_DECnet, SOCK_STREAM, 0))==INVSOC)
2.93 eric 87: #else
2.95 frystyk 88: if ((sockfd=socket(AF_INET, SOCK_STREAM,IPPROTO_TCP))==INVSOC)
2.93 eric 89: #endif
2.95 frystyk 90: {
91: HTRequest_addSystemError(request, ERR_FATAL, socerrno,
92: NO, "socket");
93: host->tcpstate = TCP_ERROR;
94: return -1;
95: }
96: if (PROT_TRACE) HTTrace(HTHIDE("Socket...... Created %d\n"), sockfd);
2.93 eric 97:
2.95 frystyk 98: /* Increase the number of sockets by one */
99: HTNet_increaseSocket();
2.97 frystyk 100:
101: /*
102: ** If we have compiled without Nagle's algorithm then try and turn
103: ** it off now
104: */
105: #ifdef HT_NO_NAGLE
106: {
107: int disable = 1;
108: status = setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &disable, sizeof(int));
109: if (status == -1) {
110: if (PROT_TRACE)
111: HTTrace("Socket...... Could not disable Nagle's algorithm - error %d\n",
112: sockfd);
113: } else {
114: if (PROT_TRACE) HTTrace("Socket...... Turned off Nagle's algorithm\n");
115: }
116: }
117: #endif
2.93 eric 118:
2.95 frystyk 119: /* If non-blocking protocol then change socket status
120: ** I use fcntl() so that I can ask the status before I set it.
121: ** See W. Richard Stevens (Advan. Prog. in UNIX environment, p.364)
122: ** Be CAREFULL with the old `O_NDELAY' - it will not work as read()
123: ** returns 0 when blocking and NOT -1. FNDELAY is ONLY for BSD and
124: ** does NOT work on SVR4 systems. O_NONBLOCK is POSIX.
125: */
126: if (!preemptive) {
2.93 eric 127: #ifdef _WINSOCKAPI_
2.95 frystyk 128: { /* begin windows scope */
129: long levents = FD_READ | FD_WRITE | FD_ACCEPT |
130: FD_CONNECT | FD_CLOSE ;
131: int rv = 0 ;
132: u_long one = 1;
133:
134: status = ioctlsocket(sockfd, FIONBIO, &one) ==
135: SOCKET_ERROR ? -1 : 0;
136: } /* end scope */
2.93 eric 137: #else /* _WINSOCKAPI_ */
138: #if defined(VMS)
2.95 frystyk 139: {
140: int enable = 1;
141: status = IOCTL(sockfd, FIONBIO, &enable);
142: }
2.93 eric 143: #else /* VMS */
2.95 frystyk 144: if((status = fcntl(sockfd, F_GETFL, 0)) != -1) {
2.93 eric 145: #ifdef O_NONBLOCK
2.95 frystyk 146: status |= O_NONBLOCK; /* POSIX */
2.93 eric 147: #else /* O_NONBLOCK */
148: #ifdef F_NDELAY
149: status |= F_NDELAY; /* BSD */
150: #endif /* F_NDELAY */
151: #endif /* !O_NONBLOCK */
2.95 frystyk 152: status = fcntl(sockfd, F_SETFL, status);
153: }
2.93 eric 154: #endif /* !VMS */
155: #endif /* !_WINSOCKAPI_ */
2.95 frystyk 156: if (PROT_TRACE) HTTrace(HTHIDE("Socket...... %slocking socket\n"), status == -1 ? "B" : "Non-b");
157: } else
158: if (PROT_TRACE) HTTrace(HTHIDE("Socket...... Blocking socket\n"));
159:
160: /*
161: ** Associate the channel with the host and create an input and and output stream
162: ** for this host/channel
163: */
164: HTHost_setChannel(host, HTChannel_new(sockfd, YES));
165: HTHost_getInput(host, transport, NULL, 0);
166: HTHost_getOutput(host, transport, NULL, 1024);
2.93 eric 167:
168: return status == -1 ? 1 : 0;
169: }
170:
2.13 frystyk 171: /* HTDoConnect()
172: **
173: ** Note: Any port indication in URL, e.g., as `host:port' overwrites
2.54 frystyk 174: ** the default port value.
2.13 frystyk 175: **
2.40 frystyk 176: ** returns HT_ERROR Error has occured or interrupted
177: ** HT_OK if connected
178: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 179: */
2.54 frystyk 180: PUBLIC int HTDoConnect (HTNet * net, char * url, u_short default_port)
2.13 frystyk 181: {
2.95 frystyk 182: HTHost * me = HTNet_host(net);
2.88 frystyk 183: HTRequest * request = HTNet_request(net);
2.95 frystyk 184: int preemptive = net->preemptive;
185: int retry = net->retry;
186:
187: int status = HT_OK;
188: char * hostname = HTHost_name(me);
2.13 frystyk 189:
2.55 frystyk 190: /* Jump into the state machine */
2.95 frystyk 191: if (!me)
192: goto tcp_begin;
2.55 frystyk 193: while (1) {
2.95 frystyk 194: switch (me->tcpstate) {
195: tcp_begin:
2.55 frystyk 196: case TCP_BEGIN:
2.91 frystyk 197: {
198: char * proxy = HTRequest_proxy(request);
2.95 frystyk 199: HTProtocol * protocol = HTNet_protocol(net);
2.91 frystyk 200:
201: /* Check to see whether we connect directly or via a proxy */
2.96 eric 202: if ((net->host = HTHost_newWParse(request, proxy ? proxy : url,
2.95 frystyk 203: HTProtocol_id(protocol))) == NULL)
204: return NO;
205: me = net->host;
2.91 frystyk 206:
207: /*
208: ** Add the net object to the host object found above. If the
209: ** host is idle then we can start the request right away,
210: ** otherwise we must wait until it is free.
211: */
2.98 frystyk 212: if ((status = HTHost_addNet(net->host, net)) == HT_PENDING)
213: if (PROT_TRACE) HTTrace("HTDoConnect. Pending...\n");
2.91 frystyk 214:
215: /*
2.95 frystyk 216: ** If we are pending then return here, otherwise go to next state
2.91 frystyk 217: ** which is setting up a channel
218: */
2.95 frystyk 219: me->tcpstate = TCP_CHANNEL;
220: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CHANNEL.\n"), me);
2.91 frystyk 221: if (status == HT_PENDING) return HT_PENDING;
222: }
223: break;
2.83 frystyk 224:
2.91 frystyk 225: case TCP_CHANNEL:
2.83 frystyk 226: /*
2.91 frystyk 227: ** The next state depends on whether we have a connection
228: ** or not - if so then we can jump directly to connect() to
229: ** test it - otherwise we must around DNS to get the name
2.93 eric 230: ** Resolved
2.83 frystyk 231: */
2.95 frystyk 232: if (HTHost_channel(me) == NULL) {
233: me->tcpstate = TCP_DNS;
234: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_DNS.\n"), me);
235: } else {
236:
237: /*
238: ** Get a new session on the MUX layer - we already have a
239: ** connection.
240: */
241: #ifdef HT_MUX
242: HTMuxChannel * muxch = HTMuxChannel_find(me);
243: HTProtocol * protocol = HTNet_protocol(net);
244: net->session = HTMuxSession_connect(muxch, net, HTProtocol_id(protocol));
245: #endif /* HT_MUX */
246:
247: /*
248: ** There is now one more using the channel
249: */
250: HTChannel_upSemaphore(me->channel);
251:
252: /*
253: ** We are now all set and can jump to connected mode
254: */
255: me->tcpstate = TCP_CONNECTED;
256: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
257: }
258: hostname = HTHost_name(me);
2.55 frystyk 259: break;
260:
2.91 frystyk 261: case TCP_DNS:
2.95 frystyk 262: if ((status = HTParseInet(me, hostname, request)) < 0) {
263: if (PROT_TRACE) HTTrace(HTHIDE("HTDoConnect. Can't locate `%s\'\n"), hostname);
2.91 frystyk 264: HTRequest_addError(request, ERR_FATAL, NO,
265: HTERR_NO_REMOTE_HOST,
266: (void *) hostname, strlen(hostname),
267: "HTDoConnect");
2.95 frystyk 268: me->tcpstate = TCP_ERROR;
269: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_ERROR.\n"), me);
2.27 frystyk 270: break;
2.55 frystyk 271: }
2.95 frystyk 272: if (!retry && status > 1) /* If multiple homes */
273: retry = status;
274: me->tcpstate = TCP_NEED_SOCKET;
275: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 276: break;
277:
278: case TCP_NEED_SOCKET:
2.95 frystyk 279: if (_makeSocket(me, request, preemptive, net->transport) == -1)
2.27 frystyk 280: break;
2.95 frystyk 281:
282: #ifdef HT_MUX
283: /*
284: ** Create a MUX channel and do a connect on this channel with a
285: ** new session.
286: */
287: {
288: HTProtocol * protocol = HTNet_protocol(net);
289: HTMuxChannel * muxch = HTMuxChannel_new(me);
290: net->session = HTMuxSession_connect(muxch, net, HTProtocol_id(protocol));
291: }
292: #endif /* HT_MUX */
2.83 frystyk 293:
2.27 frystyk 294: /* If multi-homed host then start timer on connection */
2.95 frystyk 295: if (retry) me->connecttime = time(NULL);
2.65 frystyk 296:
297: /* Progress */
298: {
299: HTAlertCallback *cbf = HTAlert_find(HT_PROG_CONNECT);
2.95 frystyk 300: if (cbf) (*cbf)(request, HT_PROG_CONNECT, HT_MSG_NULL,
2.91 frystyk 301: NULL, hostname, NULL);
2.65 frystyk 302: }
2.95 frystyk 303: me->tcpstate = TCP_NEED_CONNECT;
304: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_CONNECT.\n"), me);
2.55 frystyk 305: break;
2.56 frystyk 306: case TCP_NEED_CONNECT:
2.95 frystyk 307: status = connect(HTChannel_socket(me->channel), (struct sockaddr *) &me->sock_addr,
308: sizeof(me->sock_addr));
2.55 frystyk 309: /*
310: * According to the Sun man page for connect:
311: * EINPROGRESS The socket is non-blocking and the con-
312: * nection cannot be completed immediately.
313: * It is possible to select(2) for comple-
314: * tion by selecting the socket for writ-
315: * ing.
316: * According to the Motorola SVR4 man page for connect:
317: * EAGAIN The socket is non-blocking and the con-
318: * nection cannot be completed immediately.
319: * It is possible to select for completion
320: * by selecting the socket for writing.
321: * However, this is only possible if the
322: * socket STREAMS module is the topmost
323: * module on the protocol stack with a
324: * write service procedure. This will be
325: * the normal case.
326: */
2.93 eric 327: if (NETCALL_ERROR(status))
2.55 frystyk 328: {
2.93 eric 329: if (NETCALL_WOULDBLOCK(socerrno))
2.55 frystyk 330: {
2.95 frystyk 331: if (PROT_TRACE) HTTrace(HTHIDE("HTDoConnect. WOULD BLOCK `%s'\n"), hostname);
332: HTHost_register(me, net, HTEvent_CONNECT);
2.55 frystyk 333: return HT_WOULD_BLOCK;
334: }
335: if (socerrno == EISCONN) {
2.95 frystyk 336: me->tcpstate = TCP_CONNECTED;
337: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
2.55 frystyk 338: break;
339: }
2.93 eric 340: if (NETCALL_DEADSOCKET(socerrno)) /* We lost the socket */
2.58 frystyk 341: {
2.95 frystyk 342: me->tcpstate = TCP_NEED_SOCKET;
343: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 344: break;
2.27 frystyk 345: }
2.95 frystyk 346: if (retry) {
347: me->connecttime -= time(NULL);
2.54 frystyk 348: /* Added EINVAL `invalid argument' as this is what I
349: get back from a non-blocking connect where I should
350: get `connection refused' on BSD. SVR4 gives SIG_PIPE */
2.94 frystyk 351: #if defined(__svr4__) || defined (_WINSOCKAPI_)
2.55 frystyk 352: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
353: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
354: socerrno==EHOSTDOWN)
355: #else
2.54 frystyk 356: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
357: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
358: socerrno==EHOSTDOWN || socerrno==EINVAL)
2.35 roeber 359: #endif
2.95 frystyk 360: me->connecttime += TCP_DELAY;
2.54 frystyk 361: else
2.95 frystyk 362: me->connecttime += TCP_PENALTY;
363: HTDNS_updateWeigths(me->dns, me->home, me->connecttime);
2.55 frystyk 364: }
2.95 frystyk 365: me->tcpstate = TCP_ERROR;
366: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_ERROR.\n"), me);
367: } else {
368: me->tcpstate = TCP_CONNECTED;
369: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
370: }
2.55 frystyk 371: break;
372:
373: case TCP_CONNECTED:
2.95 frystyk 374: HTHost_unregister(me, net, HTEvent_CONNECT);
375: if (retry) {
376: me->connecttime -= time(NULL);
377: HTDNS_updateWeigths(me->dns, me->home, me->connecttime);
2.27 frystyk 378: }
2.95 frystyk 379: retry = 0;
380: me->tcpstate = TCP_BEGIN;
381: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p connected.\n"), me);
2.55 frystyk 382: return HT_OK;
383: break;
384:
2.56 frystyk 385: case TCP_NEED_BIND:
386: case TCP_NEED_LISTEN:
2.55 frystyk 387: case TCP_ERROR:
2.95 frystyk 388: HTTrace(HTHIDE("HTDoConnect. Connect failed %d\n"), socerrno);
389: if (HTChannel_socket(me->channel) != INVSOC) {
390: /* HTEvent_unregister(HTChannel_socket(me->channel), (SockOps) FD_ALL); */
391: NETCLOSE(HTChannel_socket(me->channel));
392: /* HTChannel_setSocket(me->channel, INVSOC); */
393: #if 1 /* @@@ */
394: if (HTHost_isPersistent(me)) { /* Inherited socket */
395: HTHost_setPersistent(me, NO, HT_TP_SINGLE);
396: me->tcpstate = TCP_NEED_SOCKET;
397: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 398: break;
399: }
2.95 frystyk 400: #endif
2.55 frystyk 401: }
402:
403: /* Do we have more homes to try? */
2.95 frystyk 404: if (--retry > 0) {
2.65 frystyk 405: HTRequest_addSystemError(request, ERR_NON_FATAL, socerrno, NO,
2.55 frystyk 406: "connect");
2.95 frystyk 407: me->tcpstate = TCP_DNS;
408: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_DNS.\n"), me);
2.24 frystyk 409: break;
410: }
2.65 frystyk 411: HTRequest_addSystemError(request, ERR_FATAL,socerrno,NO,"connect");
2.91 frystyk 412: HTDNS_delete(hostname);
2.95 frystyk 413: retry = 0;
414: me->tcpstate = TCP_BEGIN;
415: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_BEGIN.\n"), me);
2.55 frystyk 416: return HT_ERROR;
417: break;
2.24 frystyk 418: }
2.55 frystyk 419: }
2.13 frystyk 420: }
421:
2.56 frystyk 422: /* HTDoAccept()
423: ** ------------
424: ** This function makes a non-blocking accept which will turn up as ready
425: ** read in the select.
426: ** Returns
427: ** HT_ERROR Error has occured or interrupted
428: ** HT_OK if connected
429: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 430: */
2.95 frystyk 431:
2.88 frystyk 432: PUBLIC int HTDoAccept (HTNet * net, HTNet ** accepted)
2.13 frystyk 433: {
434: int status;
2.95 frystyk 435: int size = sizeof(net->host->sock_addr);
2.88 frystyk 436: HTRequest * request = HTNet_request(net);
2.95 frystyk 437: if (!request || HTNet_socket(net)==INVSOC) {
2.77 eric 438: if (PROT_TRACE) HTTrace("HTDoAccept.. Invalid socket\n");
2.56 frystyk 439: return HT_ERROR;
2.13 frystyk 440: }
2.65 frystyk 441:
442: /* Progress report */
443: {
444: HTAlertCallback *cbf = HTAlert_find(HT_PROG_ACCEPT);
445: if (cbf) (*cbf)(request, HT_PROG_ACCEPT, HT_MSG_NULL,NULL, NULL, NULL);
446: }
2.95 frystyk 447: status = accept(HTNet_socket(net), (struct sockaddr *) &net->host->sock_addr, &size);
2.93 eric 448: if (NETCALL_ERROR(status))
2.23 duns 449: {
2.93 eric 450: if (NETCALL_WOULDBLOCK(socerrno))
2.56 frystyk 451: {
452: if (PROT_TRACE)
2.95 frystyk 453: HTTrace("HTDoAccept.. WOULD BLOCK %d\n", HTNet_socket(net));
454: HTEvent_register(HTNet_socket(net), HTEvent_ACCEPT, &net->event);
2.56 frystyk 455: return HT_WOULD_BLOCK;
456: }
2.65 frystyk 457: HTRequest_addSystemError(request, ERR_WARN, socerrno, YES, "accept");
2.77 eric 458: if (PROT_TRACE) HTTrace("HTDoAccept.. Accept failed\n");
2.56 frystyk 459: return HT_ERROR;
2.23 duns 460: }
2.71 frystyk 461:
2.88 frystyk 462: if (PROT_TRACE) HTTrace("Accepted.... socket %d\n", status);
463:
464: /*
465: ** If accepted is the same as the net obejct then reuse it, else create
466: ** a new object and leave the original alone
467: */
468: if (*accepted == net)
469: HTDoClose(net);
470: else
471: *accepted = HTNet_dup(net);
2.95 frystyk 472: HTNet_setSocket(*accepted, status);
2.83 frystyk 473:
474: /* Create a channel for the new socket */
2.95 frystyk 475: {
476: HTHost * host = (*accepted)->host;
477: HTChannel * ch = HTChannel_new(HTNet_socket(*accepted), NO);
478: #ifdef HT_MUX
479: HTMuxChannel_new(host);
480: #endif /* HT_MUX */
481: HTHost_setChannel(host, ch);
482: }
2.56 frystyk 483: return HT_OK;
484: }
485:
486:
487: /* HTDoListen
488: ** ----------
489: ** Listens on the specified port. 0 means that we chose it here
490: ** If master==INVSOC then we listen on all local interfaces (using a
491: ** wildcard). If !INVSOC then use this as the local interface
492: ** returns HT_ERROR Error has occured or interrupted
493: ** HT_OK if connected
494: */
2.67 frystyk 495: PUBLIC int HTDoListen (HTNet * net, u_short port, SOCKET master, int backlog)
2.56 frystyk 496: {
497: int status;
498:
499: /* Jump into the state machine */
500: while (1) {
2.95 frystyk 501: switch (net->host->tcpstate) {
2.56 frystyk 502: case TCP_BEGIN:
503: {
2.95 frystyk 504: SockA *sin = &net->host->sock_addr;
2.56 frystyk 505: memset((void *) sin, '\0', sizeof(SockA));
506: #ifdef DECNET
507: sin->sdn_family = AF_DECnet;
508: sin->sdn_objnum = port;
2.36 frystyk 509: #else
2.56 frystyk 510: sin->sin_family = AF_INET;
511: if (master != INVSOC) {
512: int len = sizeof(SockA);
513: if (getsockname(master, (struct sockaddr *) sin, &len)<0) {
2.65 frystyk 514: HTRequest_addSystemError(net->request, ERR_FATAL,
515: socerrno, NO, "getsockname");
2.95 frystyk 516: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 517: break;
518: }
519: } else
520: sin->sin_addr.s_addr = INADDR_ANY;
521: sin->sin_port = htons(port);
522: #endif
523: }
524: if (PROT_TRACE)
2.83 frystyk 525: HTTrace("Socket...... Listen on port %d\n", port);
2.95 frystyk 526: net->host->tcpstate = TCP_NEED_SOCKET;
2.56 frystyk 527: break;
528:
529: case TCP_NEED_SOCKET:
2.95 frystyk 530: if (_makeSocket(net->host, net->request, net->preemptive, net->transport) == -1)
2.93 eric 531: break;
2.95 frystyk 532: net->host->tcpstate = TCP_NEED_BIND;
2.56 frystyk 533: break;
534:
535: case TCP_NEED_BIND:
2.95 frystyk 536: status = bind(HTNet_socket(net), (struct sockaddr *) &net->host->sock_addr,
537: sizeof(net->host->sock_addr));
2.93 eric 538: if (NETCALL_ERROR(status))
2.56 frystyk 539: {
540: if (PROT_TRACE)
2.83 frystyk 541: HTTrace("Socket...... Bind failed %d\n", socerrno);
2.95 frystyk 542: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 543: } else
2.95 frystyk 544: net->host->tcpstate = TCP_NEED_LISTEN;
2.56 frystyk 545: break;
546:
547: case TCP_NEED_LISTEN:
2.95 frystyk 548: status = listen(HTNet_socket(net), backlog);
2.93 eric 549: if (NETCALL_ERROR(status))
2.95 frystyk 550: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 551: else
2.95 frystyk 552: net->host->tcpstate = TCP_CONNECTED;
2.56 frystyk 553: break;
554:
555: case TCP_CONNECTED:
2.95 frystyk 556: net->host->tcpstate = TCP_BEGIN;
2.56 frystyk 557: if (PROT_TRACE)
2.83 frystyk 558: HTTrace("Socket...... Bind and listen on port %d %s\n",
2.95 frystyk 559: (int) ntohs(net->host->sock_addr.sin_port),
560: HTInetString(&net->host->sock_addr));
2.56 frystyk 561: return HT_OK;
562: break;
2.13 frystyk 563:
2.91 frystyk 564: case TCP_CHANNEL:
2.56 frystyk 565: case TCP_NEED_CONNECT:
566: case TCP_DNS:
567: case TCP_ERROR:
2.83 frystyk 568: if (PROT_TRACE) HTTrace("Socket...... Listen failed\n");
2.62 frystyk 569: HTRequest_addSystemError(net->request, ERR_FATAL, socerrno, NO, "HTDoListen");
2.95 frystyk 570: net->host->tcpstate = TCP_BEGIN;
2.56 frystyk 571: return HT_ERROR;
572: break;
573: }
2.38 frystyk 574: }
1.1 timbl 575: }
576:
2.83 frystyk 577: /* HTDoClose
578: ** ---------
579: ** Closes a file descriptor whatever means are available on the current
580: ** platform. If we have unix file descriptors then use this otherwise use
581: ** the ANSI C file descriptors
582: **
583: ** returns HT_ERROR Error has occured or interrupted
584: ** HT_OK if connected
585: ** HT_WOULD_BLOCK if operation would have blocked
586: */
2.87 frystyk 587: PUBLIC int HTDoClose (HTNet * net)
2.83 frystyk 588: {
589: int status = -1;
2.95 frystyk 590: if (net && HTNet_socket(net) != INVSOC) {
591: if (PROT_TRACE) HTTrace("HTDoClose... Close %d\n", HTNet_socket(net));
592: status = NETCLOSE(HTNet_socket(net));
593: /* HTEvent_unregister(HTNet_socket(net), (SockOps) FD_ALL); */
2.91 frystyk 594: HTNet_decreaseSocket();
2.95 frystyk 595: HTNet_setSocket(net, INVSOC);
2.91 frystyk 596:
597: /*
598: ** As we have a socket available we check for whether
599: ** we can start any pending requests. We do this by asking for
600: ** pending Host objects. If none then use the current object
601: */
602: HTHost_launchPending(net->host);
603:
604: } else
605: if (PROT_TRACE) HTTrace("HTDoClose... No pending requests\n");
2.83 frystyk 606: return status < 0 ? HT_ERROR : HT_OK;
607: }
2.91 frystyk 608:
2.83 frystyk 609:
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