Annotation of libwww/Library/src/HTTCP.c, revision 2.98
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.
2.98 ! frystyk 6: ** @(#) $Id: HTTCP.c,v 2.97 1996/12/03 14:49:14 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 1
2.95 frystyk 213: if (HTHost_addNet(net->host, net) == HT_PENDING)
2.91 frystyk 214: if (PROT_TRACE) HTTrace("HTDoConnect. Pending...\n");
2.98 ! frystyk 215: #else
! 216: if ((status = HTHost_addNet(net->host, net)) == HT_PENDING)
! 217: if (PROT_TRACE) HTTrace("HTDoConnect. Pending...\n");
! 218: #endif
2.91 frystyk 219:
220: /*
2.95 frystyk 221: ** If we are pending then return here, otherwise go to next state
2.91 frystyk 222: ** which is setting up a channel
223: */
2.95 frystyk 224: me->tcpstate = TCP_CHANNEL;
225: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CHANNEL.\n"), me);
2.91 frystyk 226: if (status == HT_PENDING) return HT_PENDING;
227: }
228: break;
2.83 frystyk 229:
2.91 frystyk 230: case TCP_CHANNEL:
2.83 frystyk 231: /*
2.91 frystyk 232: ** The next state depends on whether we have a connection
233: ** or not - if so then we can jump directly to connect() to
234: ** test it - otherwise we must around DNS to get the name
2.93 eric 235: ** Resolved
2.83 frystyk 236: */
2.95 frystyk 237: if (HTHost_channel(me) == NULL) {
238: me->tcpstate = TCP_DNS;
239: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_DNS.\n"), me);
240: } else {
241:
242: /*
243: ** Get a new session on the MUX layer - we already have a
244: ** connection.
245: */
246: #ifdef HT_MUX
247: HTMuxChannel * muxch = HTMuxChannel_find(me);
248: HTProtocol * protocol = HTNet_protocol(net);
249: net->session = HTMuxSession_connect(muxch, net, HTProtocol_id(protocol));
250: #endif /* HT_MUX */
251:
252: /*
253: ** There is now one more using the channel
254: */
255: HTChannel_upSemaphore(me->channel);
256:
257: /*
258: ** We are now all set and can jump to connected mode
259: */
260: me->tcpstate = TCP_CONNECTED;
261: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
262: }
263: hostname = HTHost_name(me);
2.55 frystyk 264: break;
265:
2.91 frystyk 266: case TCP_DNS:
2.95 frystyk 267: if ((status = HTParseInet(me, hostname, request)) < 0) {
268: if (PROT_TRACE) HTTrace(HTHIDE("HTDoConnect. Can't locate `%s\'\n"), hostname);
2.91 frystyk 269: HTRequest_addError(request, ERR_FATAL, NO,
270: HTERR_NO_REMOTE_HOST,
271: (void *) hostname, strlen(hostname),
272: "HTDoConnect");
2.95 frystyk 273: me->tcpstate = TCP_ERROR;
274: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_ERROR.\n"), me);
2.27 frystyk 275: break;
2.55 frystyk 276: }
2.95 frystyk 277: if (!retry && status > 1) /* If multiple homes */
278: retry = status;
279: me->tcpstate = TCP_NEED_SOCKET;
280: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 281: break;
282:
283: case TCP_NEED_SOCKET:
2.95 frystyk 284: if (_makeSocket(me, request, preemptive, net->transport) == -1)
2.27 frystyk 285: break;
2.95 frystyk 286:
287: #ifdef HT_MUX
288: /*
289: ** Create a MUX channel and do a connect on this channel with a
290: ** new session.
291: */
292: {
293: HTProtocol * protocol = HTNet_protocol(net);
294: HTMuxChannel * muxch = HTMuxChannel_new(me);
295: net->session = HTMuxSession_connect(muxch, net, HTProtocol_id(protocol));
296: }
297: #endif /* HT_MUX */
2.83 frystyk 298:
2.27 frystyk 299: /* If multi-homed host then start timer on connection */
2.95 frystyk 300: if (retry) me->connecttime = time(NULL);
2.65 frystyk 301:
302: /* Progress */
303: {
304: HTAlertCallback *cbf = HTAlert_find(HT_PROG_CONNECT);
2.95 frystyk 305: if (cbf) (*cbf)(request, HT_PROG_CONNECT, HT_MSG_NULL,
2.91 frystyk 306: NULL, hostname, NULL);
2.65 frystyk 307: }
2.95 frystyk 308: me->tcpstate = TCP_NEED_CONNECT;
309: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_CONNECT.\n"), me);
2.55 frystyk 310: break;
2.56 frystyk 311: case TCP_NEED_CONNECT:
2.95 frystyk 312: status = connect(HTChannel_socket(me->channel), (struct sockaddr *) &me->sock_addr,
313: sizeof(me->sock_addr));
2.55 frystyk 314: /*
315: * According to the Sun man page for connect:
316: * EINPROGRESS The socket is non-blocking and the con-
317: * nection cannot be completed immediately.
318: * It is possible to select(2) for comple-
319: * tion by selecting the socket for writ-
320: * ing.
321: * According to the Motorola SVR4 man page for connect:
322: * EAGAIN The socket is non-blocking and the con-
323: * nection cannot be completed immediately.
324: * It is possible to select for completion
325: * by selecting the socket for writing.
326: * However, this is only possible if the
327: * socket STREAMS module is the topmost
328: * module on the protocol stack with a
329: * write service procedure. This will be
330: * the normal case.
331: */
2.93 eric 332: if (NETCALL_ERROR(status))
2.55 frystyk 333: {
2.93 eric 334: if (NETCALL_WOULDBLOCK(socerrno))
2.55 frystyk 335: {
2.95 frystyk 336: if (PROT_TRACE) HTTrace(HTHIDE("HTDoConnect. WOULD BLOCK `%s'\n"), hostname);
337: HTHost_register(me, net, HTEvent_CONNECT);
2.55 frystyk 338: return HT_WOULD_BLOCK;
339: }
340: if (socerrno == EISCONN) {
2.95 frystyk 341: me->tcpstate = TCP_CONNECTED;
342: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
2.55 frystyk 343: break;
344: }
2.93 eric 345: if (NETCALL_DEADSOCKET(socerrno)) /* We lost the socket */
2.58 frystyk 346: {
2.95 frystyk 347: me->tcpstate = TCP_NEED_SOCKET;
348: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 349: break;
2.27 frystyk 350: }
2.95 frystyk 351: if (retry) {
352: me->connecttime -= time(NULL);
2.54 frystyk 353: /* Added EINVAL `invalid argument' as this is what I
354: get back from a non-blocking connect where I should
355: get `connection refused' on BSD. SVR4 gives SIG_PIPE */
2.94 frystyk 356: #if defined(__svr4__) || defined (_WINSOCKAPI_)
2.55 frystyk 357: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
358: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
359: socerrno==EHOSTDOWN)
360: #else
2.54 frystyk 361: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
362: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
363: socerrno==EHOSTDOWN || socerrno==EINVAL)
2.35 roeber 364: #endif
2.95 frystyk 365: me->connecttime += TCP_DELAY;
2.54 frystyk 366: else
2.95 frystyk 367: me->connecttime += TCP_PENALTY;
368: HTDNS_updateWeigths(me->dns, me->home, me->connecttime);
2.55 frystyk 369: }
2.95 frystyk 370: me->tcpstate = TCP_ERROR;
371: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_ERROR.\n"), me);
372: } else {
373: me->tcpstate = TCP_CONNECTED;
374: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
375: }
2.55 frystyk 376: break;
377:
378: case TCP_CONNECTED:
2.95 frystyk 379: HTHost_unregister(me, net, HTEvent_CONNECT);
380: if (retry) {
381: me->connecttime -= time(NULL);
382: HTDNS_updateWeigths(me->dns, me->home, me->connecttime);
2.27 frystyk 383: }
2.95 frystyk 384: retry = 0;
385: me->tcpstate = TCP_BEGIN;
386: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p connected.\n"), me);
2.55 frystyk 387: return HT_OK;
388: break;
389:
2.56 frystyk 390: case TCP_NEED_BIND:
391: case TCP_NEED_LISTEN:
2.55 frystyk 392: case TCP_ERROR:
2.95 frystyk 393: HTTrace(HTHIDE("HTDoConnect. Connect failed %d\n"), socerrno);
394: if (HTChannel_socket(me->channel) != INVSOC) {
395: /* HTEvent_unregister(HTChannel_socket(me->channel), (SockOps) FD_ALL); */
396: NETCLOSE(HTChannel_socket(me->channel));
397: /* HTChannel_setSocket(me->channel, INVSOC); */
398: #if 1 /* @@@ */
399: if (HTHost_isPersistent(me)) { /* Inherited socket */
400: HTHost_setPersistent(me, NO, HT_TP_SINGLE);
401: me->tcpstate = TCP_NEED_SOCKET;
402: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 403: break;
404: }
2.95 frystyk 405: #endif
2.55 frystyk 406: }
407:
408: /* Do we have more homes to try? */
2.95 frystyk 409: if (--retry > 0) {
2.65 frystyk 410: HTRequest_addSystemError(request, ERR_NON_FATAL, socerrno, NO,
2.55 frystyk 411: "connect");
2.95 frystyk 412: me->tcpstate = TCP_DNS;
413: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_DNS.\n"), me);
2.24 frystyk 414: break;
415: }
2.65 frystyk 416: HTRequest_addSystemError(request, ERR_FATAL,socerrno,NO,"connect");
2.91 frystyk 417: HTDNS_delete(hostname);
2.95 frystyk 418: retry = 0;
419: me->tcpstate = TCP_BEGIN;
420: if (PROT_TRACE) HTTrace(HTHIDE("HTHost %p going to state TCP_BEGIN.\n"), me);
2.55 frystyk 421: return HT_ERROR;
422: break;
2.24 frystyk 423: }
2.55 frystyk 424: }
2.13 frystyk 425: }
426:
2.56 frystyk 427: /* HTDoAccept()
428: ** ------------
429: ** This function makes a non-blocking accept which will turn up as ready
430: ** read in the select.
431: ** Returns
432: ** HT_ERROR Error has occured or interrupted
433: ** HT_OK if connected
434: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 435: */
2.95 frystyk 436:
2.88 frystyk 437: PUBLIC int HTDoAccept (HTNet * net, HTNet ** accepted)
2.13 frystyk 438: {
439: int status;
2.95 frystyk 440: int size = sizeof(net->host->sock_addr);
2.88 frystyk 441: HTRequest * request = HTNet_request(net);
2.95 frystyk 442: if (!request || HTNet_socket(net)==INVSOC) {
2.77 eric 443: if (PROT_TRACE) HTTrace("HTDoAccept.. Invalid socket\n");
2.56 frystyk 444: return HT_ERROR;
2.13 frystyk 445: }
2.65 frystyk 446:
447: /* Progress report */
448: {
449: HTAlertCallback *cbf = HTAlert_find(HT_PROG_ACCEPT);
450: if (cbf) (*cbf)(request, HT_PROG_ACCEPT, HT_MSG_NULL,NULL, NULL, NULL);
451: }
2.95 frystyk 452: status = accept(HTNet_socket(net), (struct sockaddr *) &net->host->sock_addr, &size);
2.93 eric 453: if (NETCALL_ERROR(status))
2.23 duns 454: {
2.93 eric 455: if (NETCALL_WOULDBLOCK(socerrno))
2.56 frystyk 456: {
457: if (PROT_TRACE)
2.95 frystyk 458: HTTrace("HTDoAccept.. WOULD BLOCK %d\n", HTNet_socket(net));
459: HTEvent_register(HTNet_socket(net), HTEvent_ACCEPT, &net->event);
2.56 frystyk 460: return HT_WOULD_BLOCK;
461: }
2.65 frystyk 462: HTRequest_addSystemError(request, ERR_WARN, socerrno, YES, "accept");
2.77 eric 463: if (PROT_TRACE) HTTrace("HTDoAccept.. Accept failed\n");
2.56 frystyk 464: return HT_ERROR;
2.23 duns 465: }
2.71 frystyk 466:
2.88 frystyk 467: if (PROT_TRACE) HTTrace("Accepted.... socket %d\n", status);
468:
469: /*
470: ** If accepted is the same as the net obejct then reuse it, else create
471: ** a new object and leave the original alone
472: */
473: if (*accepted == net)
474: HTDoClose(net);
475: else
476: *accepted = HTNet_dup(net);
2.95 frystyk 477: HTNet_setSocket(*accepted, status);
2.83 frystyk 478:
479: /* Create a channel for the new socket */
2.95 frystyk 480: {
481: HTHost * host = (*accepted)->host;
482: HTChannel * ch = HTChannel_new(HTNet_socket(*accepted), NO);
483: #ifdef HT_MUX
484: HTMuxChannel_new(host);
485: #endif /* HT_MUX */
486: HTHost_setChannel(host, ch);
487: }
2.56 frystyk 488: return HT_OK;
489: }
490:
491:
492: /* HTDoListen
493: ** ----------
494: ** Listens on the specified port. 0 means that we chose it here
495: ** If master==INVSOC then we listen on all local interfaces (using a
496: ** wildcard). If !INVSOC then use this as the local interface
497: ** returns HT_ERROR Error has occured or interrupted
498: ** HT_OK if connected
499: */
2.67 frystyk 500: PUBLIC int HTDoListen (HTNet * net, u_short port, SOCKET master, int backlog)
2.56 frystyk 501: {
502: int status;
503:
504: /* Jump into the state machine */
505: while (1) {
2.95 frystyk 506: switch (net->host->tcpstate) {
2.56 frystyk 507: case TCP_BEGIN:
508: {
2.95 frystyk 509: SockA *sin = &net->host->sock_addr;
2.56 frystyk 510: memset((void *) sin, '\0', sizeof(SockA));
511: #ifdef DECNET
512: sin->sdn_family = AF_DECnet;
513: sin->sdn_objnum = port;
2.36 frystyk 514: #else
2.56 frystyk 515: sin->sin_family = AF_INET;
516: if (master != INVSOC) {
517: int len = sizeof(SockA);
518: if (getsockname(master, (struct sockaddr *) sin, &len)<0) {
2.65 frystyk 519: HTRequest_addSystemError(net->request, ERR_FATAL,
520: socerrno, NO, "getsockname");
2.95 frystyk 521: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 522: break;
523: }
524: } else
525: sin->sin_addr.s_addr = INADDR_ANY;
526: sin->sin_port = htons(port);
527: #endif
528: }
529: if (PROT_TRACE)
2.83 frystyk 530: HTTrace("Socket...... Listen on port %d\n", port);
2.95 frystyk 531: net->host->tcpstate = TCP_NEED_SOCKET;
2.56 frystyk 532: break;
533:
534: case TCP_NEED_SOCKET:
2.95 frystyk 535: if (_makeSocket(net->host, net->request, net->preemptive, net->transport) == -1)
2.93 eric 536: break;
2.95 frystyk 537: net->host->tcpstate = TCP_NEED_BIND;
2.56 frystyk 538: break;
539:
540: case TCP_NEED_BIND:
2.95 frystyk 541: status = bind(HTNet_socket(net), (struct sockaddr *) &net->host->sock_addr,
542: sizeof(net->host->sock_addr));
2.93 eric 543: if (NETCALL_ERROR(status))
2.56 frystyk 544: {
545: if (PROT_TRACE)
2.83 frystyk 546: HTTrace("Socket...... Bind failed %d\n", socerrno);
2.95 frystyk 547: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 548: } else
2.95 frystyk 549: net->host->tcpstate = TCP_NEED_LISTEN;
2.56 frystyk 550: break;
551:
552: case TCP_NEED_LISTEN:
2.95 frystyk 553: status = listen(HTNet_socket(net), backlog);
2.93 eric 554: if (NETCALL_ERROR(status))
2.95 frystyk 555: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 556: else
2.95 frystyk 557: net->host->tcpstate = TCP_CONNECTED;
2.56 frystyk 558: break;
559:
560: case TCP_CONNECTED:
2.95 frystyk 561: net->host->tcpstate = TCP_BEGIN;
2.56 frystyk 562: if (PROT_TRACE)
2.83 frystyk 563: HTTrace("Socket...... Bind and listen on port %d %s\n",
2.95 frystyk 564: (int) ntohs(net->host->sock_addr.sin_port),
565: HTInetString(&net->host->sock_addr));
2.56 frystyk 566: return HT_OK;
567: break;
2.13 frystyk 568:
2.91 frystyk 569: case TCP_CHANNEL:
2.56 frystyk 570: case TCP_NEED_CONNECT:
571: case TCP_DNS:
572: case TCP_ERROR:
2.83 frystyk 573: if (PROT_TRACE) HTTrace("Socket...... Listen failed\n");
2.62 frystyk 574: HTRequest_addSystemError(net->request, ERR_FATAL, socerrno, NO, "HTDoListen");
2.95 frystyk 575: net->host->tcpstate = TCP_BEGIN;
2.56 frystyk 576: return HT_ERROR;
577: break;
578: }
2.38 frystyk 579: }
1.1 timbl 580: }
581:
2.83 frystyk 582: /* HTDoClose
583: ** ---------
584: ** Closes a file descriptor whatever means are available on the current
585: ** platform. If we have unix file descriptors then use this otherwise use
586: ** the ANSI C file descriptors
587: **
588: ** returns HT_ERROR Error has occured or interrupted
589: ** HT_OK if connected
590: ** HT_WOULD_BLOCK if operation would have blocked
591: */
2.87 frystyk 592: PUBLIC int HTDoClose (HTNet * net)
2.83 frystyk 593: {
594: int status = -1;
2.95 frystyk 595: if (net && HTNet_socket(net) != INVSOC) {
596: if (PROT_TRACE) HTTrace("HTDoClose... Close %d\n", HTNet_socket(net));
597: status = NETCLOSE(HTNet_socket(net));
598: /* HTEvent_unregister(HTNet_socket(net), (SockOps) FD_ALL); */
2.91 frystyk 599: HTNet_decreaseSocket();
2.95 frystyk 600: HTNet_setSocket(net, INVSOC);
2.91 frystyk 601:
602: /*
603: ** As we have a socket available we check for whether
604: ** we can start any pending requests. We do this by asking for
605: ** pending Host objects. If none then use the current object
606: */
607: HTHost_launchPending(net->host);
608:
609: } else
610: if (PROT_TRACE) HTTrace("HTDoClose... No pending requests\n");
2.83 frystyk 611: return status < 0 ? HT_ERROR : HT_OK;
612: }
2.91 frystyk 613:
2.83 frystyk 614:
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTTCP.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src