Annotation of libwww/Library/src/HTTCP.c, revision 2.94.2.2
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.
2.94.2.2! frystyk 6: ** @(#) $Id: HTTCP.c,v 2.94.2.1 1996/10/29 21:27:19 eric 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"
2.94.2.2! 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:
2.94.2.1 eric 29: #include "HTWatch.h"
30: #include "HTHstMan.h"
31:
2.36 frystyk 32: /* VMS stuff */
33: #ifdef VMS
34: #ifndef MULTINET
35: #define FD_SETSIZE 32
36: #else /* Multinet */
37: #define FD_SETSIZE 256
38: #endif /* Multinet */
39: #endif /* VMS */
40:
2.13 frystyk 41: /* Macros and other defines */
2.24 frystyk 42: /* x seconds penalty on a multi-homed host if IP-address is down */
43: #define TCP_PENALTY 1200
44:
45: /* x seconds penalty on a multi-homed host if IP-address is timed out */
46: #define TCP_DELAY 600
47:
2.93 eric 48: /* imperical study in socket call error codes
49: */
50: #ifdef _WINSOCKAPI_ /* windows */
51: #define NETCALL_ERROR(ret) (ret == SOCKET_ERROR)
52: #define NETCALL_DEADSOCKET(err) (err == WSAEBADF)
53: #define NETCALL_WOULDBLOCK(err) (err == WSAEWOULDBLOCK)
54: #else /* _WINSOCKAPI_ unix */
55: #define NETCALL_ERROR(ret) (ret < 0)
56: #define NETCALL_DEADSOCKET(err) (err == EBADF)
57: #if defined(EAGAIN) && defined(EALREADY)
58: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS || \
59: err == EALREADY || \
60: err == EAGAIN)
61: #else /* (EAGAIN && EALREADY) */
62: #ifdef EALREADY
63: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS || err == EALREADY)
64: #else /* EALREADY */
65: #ifdef EAGAIN
66: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS || err == EAGAIN)
67: #else /* EAGAIN */
68: #define NETCALL_WOULDBLOCK(err) (err == EINPROGRESS)
69: #endif /* !EAGAIN */
70: #endif /* !EALREADY */
71: #endif /* !(EAGAIN && EALREADY) */
72: #endif /* !_WINSOCKAPI_ done */
2.13 frystyk 73: /* ------------------------------------------------------------------------- */
2.19 frystyk 74: /* CONNECTION ESTABLISHMENT MANAGEMENT */
75: /* ------------------------------------------------------------------------- */
2.13 frystyk 76:
2.94.2.1 eric 77: /* _makeSocket - create a socket, if !preemptive, set FIONBIO
2.93 eric 78: * returns 1: blocking
79: * 0: non-blocking
80: * -1: creation error
81: */
2.94.2.1 eric 82: PRIVATE int _makeSocket(HTHost * host, HTRequest * request, int preemptive, HTTransport * transport)
2.93 eric 83: {
2.94.2.2! frystyk 84: int status = 1;
2.94.2.1 eric 85: SOCKET sockfd;
2.93 eric 86: #ifdef DECNET
2.94.2.1 eric 87: if ((sockfd=socket(AF_DECnet, SOCK_STREAM, 0))==INVSOC)
2.93 eric 88: #else
2.94.2.1 eric 89: if ((sockfd=socket(AF_INET, SOCK_STREAM,IPPROTO_TCP))==INVSOC)
2.93 eric 90: #endif
91: {
2.94.2.1 eric 92: HTRequest_addSystemError(request, ERR_FATAL, socerrno,
2.93 eric 93: NO, "socket");
2.94.2.1 eric 94: host->tcpstate = TCP_ERROR;
2.93 eric 95: return -1;
96: }
2.94.2.1 eric 97: HTWATCH(PROT_TRACE, host, HTHIDE("Socket...... Created %d\n"), sockfd);
2.93 eric 98:
99: /* Increase the number of sockets by one */
100: HTNet_increaseSocket();
101:
102: /* If non-blocking protocol then change socket status
103: ** I use fcntl() so that I can ask the status before I set it.
104: ** See W. Richard Stevens (Advan. Prog. in UNIX environment, p.364)
105: ** Be CAREFULL with the old `O_NDELAY' - it will not work as read()
106: ** returns 0 when blocking and NOT -1. FNDELAY is ONLY for BSD and
107: ** does NOT work on SVR4 systems. O_NONBLOCK is POSIX.
108: */
2.94.2.1 eric 109: if (!preemptive) {
2.93 eric 110: #ifdef _WINSOCKAPI_
111: { /* begin windows scope */
112: long levents = FD_READ | FD_WRITE | FD_ACCEPT |
113: FD_CONNECT | FD_CLOSE ;
114: int rv = 0 ;
115: u_long one = 1;
116:
2.94.2.1 eric 117: status = ioctlsocket(sockfd, FIONBIO, &one) ==
2.93 eric 118: SOCKET_ERROR ? -1 : 0;
119: } /* end scope */
120: #else /* _WINSOCKAPI_ */
121: #if defined(VMS)
122: {
123: int enable = 1;
2.94.2.1 eric 124: status = IOCTL(sockfd, FIONBIO, &enable);
2.93 eric 125: }
126: #else /* VMS */
2.94.2.1 eric 127: if((status = fcntl(sockfd, F_GETFL, 0)) != -1) {
2.93 eric 128: #ifdef O_NONBLOCK
129: status |= O_NONBLOCK; /* POSIX */
130: #else /* O_NONBLOCK */
131: #ifdef F_NDELAY
132: status |= F_NDELAY; /* BSD */
133: #endif /* F_NDELAY */
134: #endif /* !O_NONBLOCK */
2.94.2.1 eric 135: status = fcntl(sockfd, F_SETFL, status);
2.93 eric 136: }
137: #endif /* !VMS */
138: #endif /* !_WINSOCKAPI_ */
2.94.2.1 eric 139: HTWATCH(PROT_TRACE, host, HTHIDE("Socket...... %slocking socket\n"), status == -1 ? "B" : "Non-b");
140: } else
141: HTWATCH(PROT_TRACE, host, HTHIDE("Socket...... Blocking socket\n"));
142:
2.94.2.2! frystyk 143: /*
! 144: ** Associate the channel with the host and create an input and and output stream
! 145: ** for this host/channel
! 146: */
! 147: HTHost_setChannel(host, HTChannel_new(sockfd, YES));
! 148: HTHost_getInput(host, transport, NULL, 0);
! 149: HTHost_getOutput(host, transport, NULL, 0);
2.93 eric 150:
151: return status == -1 ? 1 : 0;
152: }
153:
2.13 frystyk 154: /* HTDoConnect()
155: **
156: ** Note: Any port indication in URL, e.g., as `host:port' overwrites
2.54 frystyk 157: ** the default port value.
2.13 frystyk 158: **
2.40 frystyk 159: ** returns HT_ERROR Error has occured or interrupted
160: ** HT_OK if connected
161: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 162: */
2.54 frystyk 163: PUBLIC int HTDoConnect (HTNet * net, char * url, u_short default_port)
2.13 frystyk 164: {
2.94.2.1 eric 165: HTHost * me = net->host;
2.88 frystyk 166: HTRequest * request = HTNet_request(net);
2.94.2.1 eric 167: int preemptive = net->preemptive;
168: int retry = net->retry;
169:
170: int status = HT_OK;
171: char * hostname = HTHost_name(me);
2.13 frystyk 172:
2.55 frystyk 173: /* Jump into the state machine */
2.94.2.1 eric 174: if (!me)
175: goto tcp_begin;
2.55 frystyk 176: while (1) {
2.94.2.1 eric 177: switch (me->tcpstate) {
178: tcp_begin:
2.55 frystyk 179: case TCP_BEGIN:
2.91 frystyk 180: {
181: char * proxy = HTRequest_proxy(request);
2.94.2.1 eric 182: char * physical = HTAnchor_physical(HTRequest_anchor(request));
2.91 frystyk 183:
184: /* Check to see whether we connect directly or via a proxy */
2.94.2.1 eric 185: if ((net->host = HTHost_newWParse(request, proxy ? proxy : physical,
186: HTProtocol_port(net->protocol))) == NULL)
187: return NO;
188: me = net->host;
2.91 frystyk 189:
190: /*
191: ** Add the net object to the host object found above. If the
192: ** host is idle then we can start the request right away,
193: ** otherwise we must wait until it is free.
194: */
2.94.2.1 eric 195: if (HTHost_addNet(net->host, net) == HT_PENDING)
2.91 frystyk 196: if (PROT_TRACE) HTTrace("HTDoConnect. Pending...\n");
197:
198: /*
2.94.2.1 eric 199: ** If we are pending then return here, otherwise go to next state
2.91 frystyk 200: ** which is setting up a channel
201: */
2.94.2.1 eric 202: me->tcpstate = TCP_CHANNEL;
203: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_CHANNEL.\n"), me);
2.91 frystyk 204: if (status == HT_PENDING) return HT_PENDING;
205: }
206: break;
2.83 frystyk 207:
2.91 frystyk 208: case TCP_CHANNEL:
2.83 frystyk 209: /*
2.91 frystyk 210: ** The next state depends on whether we have a connection
211: ** or not - if so then we can jump directly to connect() to
212: ** test it - otherwise we must around DNS to get the name
2.93 eric 213: ** Resolved
2.83 frystyk 214: */
2.94.2.1 eric 215: if (HTHost_channel(me) == NULL) {
216: me->tcpstate = TCP_DNS;
217: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_DNS.\n"), me);
218: } else {
2.94.2.2! frystyk 219:
! 220: /*
! 221: ** Get a new session on the MUX layer - we already have a
! 222: ** connection.
! 223: */
! 224: #ifdef HT_MUX
! 225: HTMuxChannel * muxch = HTHost_muxChannel(me);
! 226: HTSession * session = HTSession_new(net, "http");
! 227: HTSession_connect(muxch, session);
! 228: #endif /* HT_MUX */
! 229:
! 230: /*
! 231: ** There is now one more using the channel
! 232: */
2.94.2.1 eric 233: HTChannel_upSemaphore(me->channel);
2.94.2.2! frystyk 234:
! 235: /*
! 236: ** We are now all set and can jump to connected mode
! 237: */
2.94.2.1 eric 238: me->tcpstate = TCP_CONNECTED;
239: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
240: }
241: hostname = HTHost_name(me);
2.55 frystyk 242: break;
243:
2.91 frystyk 244: case TCP_DNS:
2.94.2.1 eric 245: if ((status = HTParseInet(me, hostname, request)) < 0) {
246: HTWATCH(PROT_TRACE, me, HTHIDE("HTDoConnect. Can't locate `%s\'\n"), hostname);
2.91 frystyk 247: HTRequest_addError(request, ERR_FATAL, NO,
248: HTERR_NO_REMOTE_HOST,
249: (void *) hostname, strlen(hostname),
250: "HTDoConnect");
2.94.2.1 eric 251: me->tcpstate = TCP_ERROR;
252: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_ERROR.\n"), me);
2.27 frystyk 253: break;
2.55 frystyk 254: }
2.94.2.1 eric 255: if (!retry && status > 1) /* If multiple homes */
256: retry = status;
257: me->tcpstate = TCP_NEED_SOCKET;
258: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 259: break;
260:
261: case TCP_NEED_SOCKET:
2.94.2.1 eric 262: if (_makeSocket(me, request, preemptive, net->transport) == -1)
2.27 frystyk 263: break;
2.83 frystyk 264:
2.94.2.2! frystyk 265: #ifdef HT_MUX
! 266: /*
! 267: ** Create a MUX channel and do a connect on this channel with a
! 268: ** new session.
! 269: */
! 270: {
! 271: HTChannel * channel = HTHost_channel(me);
! 272: HTMuxChannel * muxch = HTMuxChannel_new(me, channel);
! 273: HTSession * session = HTSession_new(net, "http");
! 274: HTHost_setMuxChannel(me, muxch);
! 275: HTHost_setMode(me, HT_TP_INTERLEAVE);
! 276: HTSession_connect(muxch, session);
! 277: }
! 278: #endif /* HT_MUX */
! 279:
2.27 frystyk 280: /* If multi-homed host then start timer on connection */
2.94.2.1 eric 281: if (retry) me->connecttime = time(NULL);
2.65 frystyk 282:
283: /* Progress */
284: {
285: HTAlertCallback *cbf = HTAlert_find(HT_PROG_CONNECT);
2.94.2.1 eric 286: if (cbf) (*cbf)(request, HT_PROG_CONNECT, HT_MSG_NULL,
2.91 frystyk 287: NULL, hostname, NULL);
2.65 frystyk 288: }
2.94.2.1 eric 289: me->tcpstate = TCP_NEED_CONNECT;
290: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_NEED_CONNECT.\n"), me);
2.55 frystyk 291: break;
2.56 frystyk 292: case TCP_NEED_CONNECT:
2.94.2.1 eric 293: status = connect(HTChannel_socket(me->channel), (struct sockaddr *) &me->sock_addr,
294: sizeof(me->sock_addr));
2.55 frystyk 295: /*
296: * According to the Sun man page for connect:
297: * EINPROGRESS The socket is non-blocking and the con-
298: * nection cannot be completed immediately.
299: * It is possible to select(2) for comple-
300: * tion by selecting the socket for writ-
301: * ing.
302: * According to the Motorola SVR4 man page for connect:
303: * EAGAIN The socket is non-blocking and the con-
304: * nection cannot be completed immediately.
305: * It is possible to select for completion
306: * by selecting the socket for writing.
307: * However, this is only possible if the
308: * socket STREAMS module is the topmost
309: * module on the protocol stack with a
310: * write service procedure. This will be
311: * the normal case.
312: */
2.93 eric 313: if (NETCALL_ERROR(status))
2.55 frystyk 314: {
2.93 eric 315: if (NETCALL_WOULDBLOCK(socerrno))
2.55 frystyk 316: {
2.94.2.1 eric 317: HTWATCH(PROT_TRACE, me, HTHIDE("HTDoConnect. WOULD BLOCK `%s'\n"), hostname);
318: HTHost_register(me, net, HTEvent_CONNECT);
2.55 frystyk 319: return HT_WOULD_BLOCK;
320: }
321: if (socerrno == EISCONN) {
2.94.2.1 eric 322: me->tcpstate = TCP_CONNECTED;
323: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
2.55 frystyk 324: break;
325: }
2.93 eric 326: if (NETCALL_DEADSOCKET(socerrno)) /* We lost the socket */
2.58 frystyk 327: {
2.94.2.1 eric 328: me->tcpstate = TCP_NEED_SOCKET;
329: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 330: break;
2.27 frystyk 331: }
2.94.2.1 eric 332: if (retry) {
333: me->connecttime -= time(NULL);
2.54 frystyk 334: /* Added EINVAL `invalid argument' as this is what I
335: get back from a non-blocking connect where I should
336: get `connection refused' on BSD. SVR4 gives SIG_PIPE */
2.94 frystyk 337: #if defined(__svr4__) || defined (_WINSOCKAPI_)
2.55 frystyk 338: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
339: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
340: socerrno==EHOSTDOWN)
341: #else
2.54 frystyk 342: if (socerrno==ECONNREFUSED || socerrno==ETIMEDOUT ||
343: socerrno==ENETUNREACH || socerrno==EHOSTUNREACH ||
344: socerrno==EHOSTDOWN || socerrno==EINVAL)
2.35 roeber 345: #endif
2.94.2.1 eric 346: me->connecttime += TCP_DELAY;
2.54 frystyk 347: else
2.94.2.1 eric 348: me->connecttime += TCP_PENALTY;
349: HTDNS_updateWeigths(me->dns, me->home, me->connecttime);
2.55 frystyk 350: }
2.94.2.1 eric 351: me->tcpstate = TCP_ERROR;
352: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_ERROR.\n"), me);
353: } else {
354: me->tcpstate = TCP_CONNECTED;
355: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_CONNECTED.\n"), me);
356: }
2.55 frystyk 357: break;
358:
359: case TCP_CONNECTED:
2.94.2.1 eric 360: HTHost_unregister(me, net, HTEvent_CONNECT);
361: if (retry) {
362: me->connecttime -= time(NULL);
363: HTDNS_updateWeigths(me->dns, me->home, me->connecttime);
2.27 frystyk 364: }
2.94.2.1 eric 365: retry = 0;
366: me->tcpstate = TCP_BEGIN;
367: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p connected.\n"), me);
2.55 frystyk 368: return HT_OK;
369: break;
370:
2.56 frystyk 371: case TCP_NEED_BIND:
372: case TCP_NEED_LISTEN:
2.55 frystyk 373: case TCP_ERROR:
2.94.2.1 eric 374: HTWATCH(PROT_TRACE, me, HTHIDE("HTDoConnect. Connect failed %d\n"), socerrno);
375: if (HTChannel_socket(me->channel) != INVSOC) {
376: /* HTEvent_unregister(HTChannel_socket(me->channel), (SockOps) FD_ALL); */
377: NETCLOSE(HTChannel_socket(me->channel));
378: HTChannel_setSocket(me->channel, INVSOC);
379: #if 1 /* @@@ */
380: if (HTHost_isPersistent(me)) { /* Inherited socket */
381: HTHost_setPersistent(me, NO, HT_TP_SINGLE);
382: me->tcpstate = TCP_NEED_SOCKET;
383: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_NEED_SOCKET.\n"), me);
2.55 frystyk 384: break;
385: }
2.94.2.1 eric 386: #endif
2.55 frystyk 387: }
388:
389: /* Do we have more homes to try? */
2.94.2.1 eric 390: if (--retry > 0) {
2.65 frystyk 391: HTRequest_addSystemError(request, ERR_NON_FATAL, socerrno, NO,
2.55 frystyk 392: "connect");
2.94.2.1 eric 393: me->tcpstate = TCP_DNS;
394: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_DNS.\n"), me);
2.24 frystyk 395: break;
396: }
2.65 frystyk 397: HTRequest_addSystemError(request, ERR_FATAL,socerrno,NO,"connect");
2.91 frystyk 398: HTDNS_delete(hostname);
2.94.2.1 eric 399: retry = 0;
400: me->tcpstate = TCP_BEGIN;
401: HTWATCH(HTWatch_TCP, me, HTHIDE("HTHost %p going to state TCP_BEGIN.\n"), me);
2.55 frystyk 402: return HT_ERROR;
403: break;
2.24 frystyk 404: }
2.55 frystyk 405: }
2.13 frystyk 406: }
407:
2.56 frystyk 408: /* HTDoAccept()
409: ** ------------
410: ** This function makes a non-blocking accept which will turn up as ready
411: ** read in the select.
412: ** Returns
413: ** HT_ERROR Error has occured or interrupted
414: ** HT_OK if connected
415: ** HT_WOULD_BLOCK if operation would have blocked
2.13 frystyk 416: */
2.94.2.1 eric 417:
2.88 frystyk 418: PUBLIC int HTDoAccept (HTNet * net, HTNet ** accepted)
2.13 frystyk 419: {
420: int status;
2.94.2.1 eric 421: int size = sizeof(net->host->sock_addr);
2.88 frystyk 422: HTRequest * request = HTNet_request(net);
2.94.2.1 eric 423: if (!request || HTNet_socket(net)==INVSOC) {
2.77 eric 424: if (PROT_TRACE) HTTrace("HTDoAccept.. Invalid socket\n");
2.56 frystyk 425: return HT_ERROR;
2.13 frystyk 426: }
2.65 frystyk 427:
428: /* Progress report */
429: {
430: HTAlertCallback *cbf = HTAlert_find(HT_PROG_ACCEPT);
431: if (cbf) (*cbf)(request, HT_PROG_ACCEPT, HT_MSG_NULL,NULL, NULL, NULL);
432: }
2.94.2.1 eric 433: status = accept(HTNet_socket(net), (struct sockaddr *) &net->host->sock_addr, &size);
2.93 eric 434: if (NETCALL_ERROR(status))
2.23 duns 435: {
2.93 eric 436: if (NETCALL_WOULDBLOCK(socerrno))
2.56 frystyk 437: {
438: if (PROT_TRACE)
2.94.2.1 eric 439: HTTrace("HTDoAccept.. WOULD BLOCK %d\n", HTNet_socket(net));
440: HTEvent_register(HTNet_socket(net), HTEvent_ACCEPT, &net->event);
2.56 frystyk 441: return HT_WOULD_BLOCK;
442: }
2.65 frystyk 443: HTRequest_addSystemError(request, ERR_WARN, socerrno, YES, "accept");
2.77 eric 444: if (PROT_TRACE) HTTrace("HTDoAccept.. Accept failed\n");
2.56 frystyk 445: return HT_ERROR;
2.23 duns 446: }
2.71 frystyk 447:
2.88 frystyk 448: if (PROT_TRACE) HTTrace("Accepted.... socket %d\n", status);
449:
450: /*
451: ** If accepted is the same as the net obejct then reuse it, else create
452: ** a new object and leave the original alone
453: */
454: if (*accepted == net)
455: HTDoClose(net);
456: else
457: *accepted = HTNet_dup(net);
2.94.2.1 eric 458: HTNet_setSocket(*accepted, status);
2.83 frystyk 459:
460: /* Create a channel for the new socket */
2.94.2.2! frystyk 461: {
! 462: HTHost * host = (*accepted)->host;
! 463: HTChannel * ch = HTChannel_new(HTNet_socket(*accepted), NO);
! 464: #ifdef HT_MUX
! 465: HTMuxChannel * muxch = HTMuxChannel_new(host, ch);
! 466: HTHost_setMuxChannel(host, muxch);
! 467: #endif /* HT_MUX */
! 468: HTHost_setChannel(host, ch);
! 469: }
2.56 frystyk 470: return HT_OK;
471: }
472:
473:
474: /* HTDoListen
475: ** ----------
476: ** Listens on the specified port. 0 means that we chose it here
477: ** If master==INVSOC then we listen on all local interfaces (using a
478: ** wildcard). If !INVSOC then use this as the local interface
479: ** returns HT_ERROR Error has occured or interrupted
480: ** HT_OK if connected
481: */
2.67 frystyk 482: PUBLIC int HTDoListen (HTNet * net, u_short port, SOCKET master, int backlog)
2.56 frystyk 483: {
484: int status;
485:
486: /* Jump into the state machine */
487: while (1) {
2.94.2.1 eric 488: switch (net->host->tcpstate) {
2.56 frystyk 489: case TCP_BEGIN:
490: {
2.94.2.1 eric 491: SockA *sin = &net->host->sock_addr;
2.56 frystyk 492: memset((void *) sin, '\0', sizeof(SockA));
493: #ifdef DECNET
494: sin->sdn_family = AF_DECnet;
495: sin->sdn_objnum = port;
2.36 frystyk 496: #else
2.56 frystyk 497: sin->sin_family = AF_INET;
498: if (master != INVSOC) {
499: int len = sizeof(SockA);
500: if (getsockname(master, (struct sockaddr *) sin, &len)<0) {
2.65 frystyk 501: HTRequest_addSystemError(net->request, ERR_FATAL,
502: socerrno, NO, "getsockname");
2.94.2.1 eric 503: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 504: break;
505: }
506: } else
507: sin->sin_addr.s_addr = INADDR_ANY;
508: sin->sin_port = htons(port);
509: #endif
510: }
511: if (PROT_TRACE)
2.83 frystyk 512: HTTrace("Socket...... Listen on port %d\n", port);
2.94.2.1 eric 513: net->host->tcpstate = TCP_NEED_SOCKET;
2.56 frystyk 514: break;
515:
516: case TCP_NEED_SOCKET:
2.94.2.1 eric 517: if (_makeSocket(net->host, net->request, net->preemptive, net->transport) == -1)
2.93 eric 518: break;
2.94.2.1 eric 519: net->host->tcpstate = TCP_NEED_BIND;
2.56 frystyk 520: break;
521:
522: case TCP_NEED_BIND:
2.94.2.1 eric 523: status = bind(HTNet_socket(net), (struct sockaddr *) &net->host->sock_addr,
524: sizeof(net->host->sock_addr));
2.93 eric 525: if (NETCALL_ERROR(status))
2.56 frystyk 526: {
527: if (PROT_TRACE)
2.83 frystyk 528: HTTrace("Socket...... Bind failed %d\n", socerrno);
2.94.2.1 eric 529: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 530: } else
2.94.2.1 eric 531: net->host->tcpstate = TCP_NEED_LISTEN;
2.56 frystyk 532: break;
533:
534: case TCP_NEED_LISTEN:
2.94.2.1 eric 535: status = listen(HTNet_socket(net), backlog);
2.93 eric 536: if (NETCALL_ERROR(status))
2.94.2.1 eric 537: net->host->tcpstate = TCP_ERROR;
2.56 frystyk 538: else
2.94.2.1 eric 539: net->host->tcpstate = TCP_CONNECTED;
2.56 frystyk 540: break;
541:
542: case TCP_CONNECTED:
2.94.2.1 eric 543: net->host->tcpstate = TCP_BEGIN;
2.56 frystyk 544: if (PROT_TRACE)
2.83 frystyk 545: HTTrace("Socket...... Bind and listen on port %d %s\n",
2.94.2.1 eric 546: (int) ntohs(net->host->sock_addr.sin_port),
547: HTInetString(&net->host->sock_addr));
2.56 frystyk 548: return HT_OK;
549: break;
2.13 frystyk 550:
2.91 frystyk 551: case TCP_CHANNEL:
2.56 frystyk 552: case TCP_NEED_CONNECT:
553: case TCP_DNS:
554: case TCP_ERROR:
2.83 frystyk 555: if (PROT_TRACE) HTTrace("Socket...... Listen failed\n");
2.62 frystyk 556: HTRequest_addSystemError(net->request, ERR_FATAL, socerrno, NO, "HTDoListen");
2.94.2.1 eric 557: net->host->tcpstate = TCP_BEGIN;
2.56 frystyk 558: return HT_ERROR;
559: break;
560: }
2.38 frystyk 561: }
1.1 timbl 562: }
563:
2.83 frystyk 564: /* HTDoClose
565: ** ---------
566: ** Closes a file descriptor whatever means are available on the current
567: ** platform. If we have unix file descriptors then use this otherwise use
568: ** the ANSI C file descriptors
569: **
570: ** returns HT_ERROR Error has occured or interrupted
571: ** HT_OK if connected
572: ** HT_WOULD_BLOCK if operation would have blocked
573: */
2.87 frystyk 574: PUBLIC int HTDoClose (HTNet * net)
2.83 frystyk 575: {
576: int status = -1;
2.94.2.1 eric 577: if (net && HTNet_socket(net) != INVSOC) {
578: if (PROT_TRACE) HTTrace("HTDoClose... Close %d\n", HTNet_socket(net));
579: status = NETCLOSE(HTNet_socket(net));
580: /* HTEvent_unregister(HTNet_socket(net), (SockOps) FD_ALL); */
2.91 frystyk 581: HTNet_decreaseSocket();
2.94.2.1 eric 582: HTNet_setSocket(net, INVSOC);
2.91 frystyk 583:
584: /*
585: ** As we have a socket available we check for whether
586: ** we can start any pending requests. We do this by asking for
587: ** pending Host objects. If none then use the current object
588: */
589: HTHost_launchPending(net->host);
590:
591: } else
592: if (PROT_TRACE) HTTrace("HTDoClose... No pending requests\n");
2.83 frystyk 593: return status < 0 ? HT_ERROR : HT_OK;
594: }
2.91 frystyk 595:
2.83 frystyk 596:
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