Annotation of libwww/Library/src/HTHost.c, revision 2.43
2.1 frystyk 1: /* HTHost.c
2: ** REMOTE HOST INFORMATION
3: **
4: ** (c) COPYRIGHT MIT 1995.
5: ** Please first read the full copyright statement in the file COPYRIGH.
2.43 ! frystyk 6: ** @(#) $Id: HTHost.c,v 2.42 1998/03/20 17:52:55 frystyk Exp $
2.1 frystyk 7: **
8: ** This object manages the information that we know about a remote host.
9: ** This can for example be what type of host it is, and what version
10: ** it is using. We also keep track of persistent connections
11: **
12: ** April 96 HFN Written
13: */
14:
15: /* Library include files */
16: #include "sysdep.h"
17: #include "WWWUtil.h"
18: #include "HTParse.h"
19: #include "HTAlert.h"
20: #include "HTError.h"
21: #include "HTNetMan.h"
22: #include "HTTrans.h"
2.13 frystyk 23: #include "HTTPUtil.h"
24: #include "HTTCP.h"
2.1 frystyk 25: #include "HTHost.h" /* Implemented here */
2.13 frystyk 26: #include "HTHstMan.h"
2.1 frystyk 27:
28: #define HOST_TIMEOUT 43200L /* Default host timeout is 12 h */
2.29 frystyk 29:
2.32 frystyk 30: #define TCP_TTL 600L /* Timeout on a busy connection */
31: #define TCP_IDLE_TTL 60L /* Timeout on an idle connection */
2.29 frystyk 32:
2.32 frystyk 33: #define MAX_PIPES 100 /* maximum number of pipelined requests */
2.24 frystyk 34: #define MAX_HOST_RECOVER 3 /* Max number of auto recovery */
2.32 frystyk 35: #define DEFAULT_DELAY 30 /* Default write flush delay in ms */
2.1 frystyk 36:
2.13 frystyk 37: struct _HTInputStream {
38: const HTInputStreamClass * isa;
2.1 frystyk 39: };
40:
2.13 frystyk 41: PRIVATE int HostEvent(SOCKET soc, void * pVoid, HTEventType type);
42:
43: /* Type definitions and global variables etc. local to this module */
2.1 frystyk 44: PRIVATE time_t HostTimeout = HOST_TIMEOUT; /* Timeout on host entries */
2.32 frystyk 45: PRIVATE time_t TcpTtl = TCP_TTL; /* Timeout on persistent channels */
2.1 frystyk 46:
2.8 frystyk 47: PRIVATE HTList ** HostTable = NULL;
48: PRIVATE HTList * PendHost = NULL; /* List of pending host elements */
2.1 frystyk 49:
2.40 kahan 50: /* JK: New functions for interruption the automatic pending request
51: activation */
52: PRIVATE HTHost_ActivateRequestCallback * ActivateReqCBF = NULL;
53: PRIVATE int HTHost_ActivateRequest (HTNet *net);
54: PRIVATE BOOL DoPendingReqLaunch = YES; /* controls automatic activation
55: of pending requests */
56:
2.13 frystyk 57: PRIVATE int EventTimeout = -1; /* Global Host event timeout */
58:
2.36 frystyk 59: PRIVATE ms_t WriteDelay = DEFAULT_DELAY; /* Delay in ms */
2.26 frystyk 60:
2.1 frystyk 61: /* ------------------------------------------------------------------------- */
62:
63: PRIVATE void free_object (HTHost * me)
64: {
65: if (me) {
2.30 frystyk 66: int i;
2.1 frystyk 67: HT_FREE(me->hostname);
68: HT_FREE(me->type);
2.12 frystyk 69: HT_FREE(me->server);
70: HT_FREE(me->user_agent);
71: HT_FREE(me->range_units);
2.30 frystyk 72:
73: /* Delete the channel (if any) */
2.3 eric 74: if (me->channel) {
2.5 eric 75: HTChannel_delete(me->channel, HT_OK);
2.3 eric 76: me->channel = NULL;
77: }
2.30 frystyk 78:
79: /* Unregister the events */
2.18 eric 80: for (i = 0; i < HTEvent_TYPES; i++)
81: HTEvent_delete(me->events[i]);
2.30 frystyk 82:
83: /* Delete the timer (if any) */
84: if (me->timer) HTTimer_delete(me->timer);
85:
86: /* Delete the queues */
2.8 frystyk 87: HTList_delete(me->pipeline);
88: HTList_delete(me->pending);
2.1 frystyk 89: HT_FREE(me);
90: }
91: }
92:
93: PRIVATE BOOL delete_object (HTList * list, HTHost * me)
94: {
2.2 frystyk 95: if (CORE_TRACE) HTTrace("Host info... object %p from list %p\n", me, list);
2.1 frystyk 96: HTList_removeObject(list, (void *) me);
97: free_object(me);
98: return YES;
99: }
100:
2.13 frystyk 101: PRIVATE BOOL isLastInPipe (HTHost * host, HTNet * net)
102: {
103: return HTList_lastObject(host->pipeline) == net;
104: }
105:
106: /*
107: ** HostEvent - host event manager - recieves events from the event
108: ** manager and dispatches them to the client net objects by calling the
109: ** net object's cbf.
110: **
111: */
112: PRIVATE int HostEvent (SOCKET soc, void * pVoid, HTEventType type)
113: {
114: HTHost * host = (HTHost *)pVoid;
115:
2.18 eric 116: if (type == HTEvent_READ || type == HTEvent_CLOSE) {
2.13 frystyk 117: HTNet * targetNet;
118:
119: /* call the first net object */
120: do {
121: int ret;
122: targetNet = (HTNet *)HTList_firstObject(host->pipeline);
123: if (targetNet) {
124: if (CORE_TRACE)
2.28 frystyk 125: HTTrace("Host Event.. READ passed to `%s\'\n",
126: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 127: if ((ret = (*targetNet->event.cbf)(HTChannel_socket(host->channel),
128: targetNet->event.param, type)) != HT_OK)
129: return ret;
130: }
131: if (targetNet == NULL && host->remainingRead > 0) {
2.31 frystyk 132: if (CORE_TRACE)
133: HTTrace("HostEvent... Error: %d bytes left to read and nowhere to put them\n",
134: host->remainingRead);
2.13 frystyk 135: host->remainingRead = 0;
136: /*
137: ** Fall through to close the channel
138: */
139: }
140: /* call pipelined net object to eat all the data in the channel */
141: } while (host->remainingRead > 0);
142:
143: /* last target net should have set remainingRead to 0 */
144: if (targetNet)
145: return HT_OK;
146:
147: /* If there was notargetNet, it should be a close */
2.28 frystyk 148: if (CORE_TRACE)
149: HTTrace("Host Event.. host %p `%s\' closed connection.\n",
150: host, host->hostname);
2.13 frystyk 151:
152: /* Is there garbage in the channel? Let's check: */
153: {
154: char buf[256];
155: int ret;
2.28 frystyk 156: memset(buf, '\0', sizeof(buf));
157: while ((ret = NETREAD(HTChannel_socket(host->channel), buf, sizeof(buf))) > 0) {
158: if (CORE_TRACE)
159: HTTrace("Host Event.. Host %p `%s\' had %d extraneous bytes: `%s\'\n",
160: host, host->hostname, ret, buf);
161: memset(buf, '\0', sizeof(buf));
162: }
2.13 frystyk 163: }
164: HTHost_clearChannel(host, HT_OK);
2.28 frystyk 165: return HT_OK; /* extra garbage does not constitute an application error */
2.13 frystyk 166:
2.18 eric 167: } else if (type == HTEvent_WRITE || type == HTEvent_CONNECT) {
2.13 frystyk 168: HTNet * targetNet = (HTNet *)HTList_lastObject(host->pipeline);
169: if (targetNet) {
170: if (CORE_TRACE)
2.28 frystyk 171: HTTrace("Host Event.. WRITE passed to `%s\'\n",
172: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 173: return (*targetNet->event.cbf)(HTChannel_socket(host->channel), targetNet->event.param, type);
174: }
2.43 ! frystyk 175: #if 0
! 176: HTDebugBreak(__FILE__, __LINE__, "Host %p (%s) has no target\n",
! 177: host, host->hostname ? host->hostname : "<none>");
2.13 frystyk 178: return HT_ERROR;
2.43 ! frystyk 179: #else
! 180: return HT_OK;
! 181: #endif
2.14 frystyk 182: } else if (type == HTEvent_TIMEOUT) {
183:
184: if (CORE_TRACE)
185: HTTrace("Host Event.. WE SHOULD DELETE ALL REQUEST ON `%s\'?\n",
186: host->hostname);
2.13 frystyk 187:
2.14 frystyk 188: } else {
2.43 ! frystyk 189: HTDebugBreak(__FILE__, __LINE__, "Don't know how to handle OOB data from `%s\'?\n", host->hostname);
2.14 frystyk 190: }
2.13 frystyk 191: return HT_OK;
192: }
193:
2.30 frystyk 194: PRIVATE int TimeoutEvent (HTTimer * timer, void * param, HTEventType type)
195: {
196: HTHost * host = (HTHost *) param;
197: SOCKET sockfd = HTChannel_socket(host->channel);
198: int result = HostEvent (sockfd, host, HTEvent_CLOSE);
199: HTTimer_delete(timer);
200: host->timer = NULL;
201: return result;
202: }
203:
2.1 frystyk 204: /*
205: ** Search the host info cache for a host object or create a new one
206: ** and add it. Examples of host names are
207: **
208: ** www.w3.org
209: ** www.foo.com:8000
210: ** 18.52.0.18
211: **
212: ** Returns Host object or NULL if error. You may get back an already
213: ** existing host object - you're not guaranteed a new one each time.
214: */
2.15 eric 215: PUBLIC HTHost * HTHost_new (char * host, u_short u_port)
2.1 frystyk 216: {
217: HTList * list = NULL; /* Current list in cache */
218: HTHost * pres = NULL;
2.13 frystyk 219: int hash = 0;
2.1 frystyk 220: if (!host) {
2.2 frystyk 221: if (CORE_TRACE) HTTrace("Host info... Bad argument\n");
2.1 frystyk 222: return NULL;
223: }
224:
225: /* Find a hash for this host */
226: {
227: char *ptr;
228: for (ptr=host; *ptr; ptr++)
2.13 frystyk 229: hash = (int) ((hash * 3 + (*(unsigned char *) ptr)) % HOST_HASH_SIZE);
2.1 frystyk 230: if (!HostTable) {
2.13 frystyk 231: if ((HostTable = (HTList **) HT_CALLOC(HOST_HASH_SIZE,
2.1 frystyk 232: sizeof(HTList *))) == NULL)
233: HT_OUTOFMEM("HTHost_find");
234: }
235: if (!HostTable[hash]) HostTable[hash] = HTList_new();
236: list = HostTable[hash];
237: }
238:
239: /* Search the cache */
240: {
241: HTList * cur = list;
242: while ((pres = (HTHost *) HTList_nextObject(cur))) {
2.15 eric 243: if (!strcmp(pres->hostname, host) && u_port == pres->u_port) {
2.8 frystyk 244: if (HTHost_isIdle(pres) && time(NULL)>pres->ntime+HostTimeout){
2.2 frystyk 245: if (CORE_TRACE)
2.1 frystyk 246: HTTrace("Host info... Collecting host info %p\n",pres);
247: delete_object(list, pres);
248: pres = NULL;
249: }
250: break;
251: }
252: }
253: }
254:
2.8 frystyk 255: /* If not found then create new Host object, else use existing one */
2.1 frystyk 256: if (pres) {
257: if (pres->channel) {
2.32 frystyk 258:
259: /*
260: ** If we have a TTL for this TCP connection then
261: ** check that we haven't passed it.
262: */
263: if (pres->expires > 0) {
264: time_t t = time(NULL);
265: if (pres->expires < t) { /* Cached channel is cold */
266: if (CORE_TRACE)
267: HTTrace("Host info... Persistent channel %p gotten cold\n",
268: pres->channel);
269: HTChannel_delete(pres->channel, HT_OK);
270: pres->channel = NULL;
271: } else {
272: pres->expires = t + TcpTtl;
273: if (CORE_TRACE)
274: HTTrace("Host info... REUSING CHANNEL %p\n",pres->channel);
275: }
276: }
2.1 frystyk 277: }
278: } else {
279: if ((pres = (HTHost *) HT_CALLOC(1, sizeof(HTHost))) == NULL)
280: HT_OUTOFMEM("HTHost_add");
2.13 frystyk 281: pres->hash = hash;
2.1 frystyk 282: StrAllocCopy(pres->hostname, host);
2.15 eric 283: pres->u_port = u_port;
2.1 frystyk 284: pres->ntime = time(NULL);
2.8 frystyk 285: pres->mode = HT_TP_SINGLE;
2.26 frystyk 286: pres->delay = WriteDelay;
2.18 eric 287: {
2.26 frystyk 288: int i;
289: for (i = 0; i < HTEvent_TYPES; i++)
290: pres->events[i]= HTEvent_new(HostEvent, pres, HT_PRIORITY_MAX, EventTimeout);
2.18 eric 291: }
2.2 frystyk 292: if (CORE_TRACE)
2.24 frystyk 293: HTTrace("Host info... added `%s\' with host %p to list %p\n",
294: host, pres, list);
2.1 frystyk 295: HTList_addObject(list, (void *) pres);
296: }
297: return pres;
2.9 frystyk 298: }
299:
2.15 eric 300: PUBLIC HTHost * HTHost_newWParse (HTRequest * request, char * url, u_short u_port)
2.13 frystyk 301: {
2.32 frystyk 302: char * port;
303: char * fullhost = NULL;
304: char * parsedHost = NULL;
305: SockA * sin;
306: HTHost * me;
307: char * proxy = HTRequest_proxy(request);
2.13 frystyk 308:
2.32 frystyk 309: fullhost = HTParse(proxy ? proxy : url, "", PARSE_HOST);
2.13 frystyk 310:
311: /* If there's an @ then use the stuff after it as a hostname */
2.32 frystyk 312: if (fullhost) {
313: char * at_sign;
314: if ((at_sign = strchr(fullhost, '@')) != NULL)
315: parsedHost = at_sign+1;
316: else
317: parsedHost = fullhost;
318: }
319: if (!parsedHost || !*parsedHost) {
320: HTRequest_addError(request, ERR_FATAL, NO, HTERR_NO_HOST,
321: NULL, 0, "HTDoConnect");
322: HT_FREE(fullhost);
323: return NULL;
324: }
325: port = strchr(parsedHost, ':');
326: if (PROT_TRACE)
327: HTTrace("HTDoConnect. Looking up `%s\'\n", parsedHost);
328: if (port) {
329: *port++ = '\0';
2.36 frystyk 330: if (!*port || !isdigit((int) *port))
2.32 frystyk 331: port = 0;
332: u_port = (u_short) atol(port);
333: }
334: /* Find information about this host */
335: if ((me = HTHost_new(parsedHost, u_port)) == NULL) {
336: if (PROT_TRACE)HTTrace("HTDoConnect. Can't get host info\n");
337: me->tcpstate = TCP_ERROR;
338: return NULL;
339: }
340: sin = &me->sock_addr;
341: memset((void *) sin, '\0', sizeof(SockA));
2.13 frystyk 342: #ifdef DECNET
2.32 frystyk 343: sin->sdn_family = AF_DECnet;
344: net->sock_addr.sdn_objnum = port ? (unsigned char)(strtol(port, (char **) 0, 10)) : DNP_OBJ;
2.13 frystyk 345: #else /* Internet */
2.32 frystyk 346: sin->sin_family = AF_INET;
347: sin->sin_port = htons(u_port);
2.13 frystyk 348: #endif
2.32 frystyk 349: HT_FREE(fullhost); /* parsedHost points into fullhost */
350: return me;
2.13 frystyk 351: }
352:
2.9 frystyk 353: /*
354: ** Search the host info cache for a host object. Examples of host names:
355: **
356: ** www.w3.org
357: ** www.foo.com:8000
358: ** 18.52.0.18
359: **
360: ** Returns Host object or NULL if not found.
361: */
362: PUBLIC HTHost * HTHost_find (char * host)
363: {
364: HTList * list = NULL; /* Current list in cache */
365: HTHost * pres = NULL;
366: if (CORE_TRACE)
367: HTTrace("Host info... Looking for `%s\'\n", host ? host : "<null>");
368:
369: /* Find a hash for this host */
370: if (host && HostTable) {
371: int hash = 0;
372: char *ptr;
373: for (ptr=host; *ptr; ptr++)
2.13 frystyk 374: hash = (int) ((hash * 3 + (*(unsigned char *) ptr)) % HOST_HASH_SIZE);
2.9 frystyk 375: if (!HostTable[hash]) return NULL;
376: list = HostTable[hash];
377:
378: /* Search the cache */
379: {
380: HTList * cur = list;
381: while ((pres = (HTHost *) HTList_nextObject(cur))) {
382: if (!strcmp(pres->hostname, host)) {
383: if (time(NULL) > pres->ntime + HostTimeout) {
384: if (CORE_TRACE)
385: HTTrace("Host info... Collecting host %p\n", pres);
386: delete_object(list, pres);
387: pres = NULL;
388: } else {
389: if (CORE_TRACE)
390: HTTrace("Host info... Found `%s\'\n", host);
391: }
392: return pres;
393: }
394: }
395: }
396: }
397: return NULL;
2.1 frystyk 398: }
399:
400: /*
2.8 frystyk 401: ** Get and set the hostname of the remote host
402: */
403: PUBLIC char * HTHost_name (HTHost * host)
404: {
405: return host ? host->hostname : NULL;
406: }
407:
408: /*
2.1 frystyk 409: ** Get and set the type class of the remote host
410: */
411: PUBLIC char * HTHost_class (HTHost * host)
412: {
413: return host ? host->type : NULL;
414: }
415:
416: PUBLIC void HTHost_setClass (HTHost * host, char * s_class)
417: {
418: if (host && s_class) StrAllocCopy(host->type, s_class);
419: }
420:
421: /*
422: ** Get and set the version of the remote host
423: */
424: PUBLIC int HTHost_version (HTHost *host)
425: {
426: return host ? host->version : 0;
427: }
428:
429: PUBLIC void HTHost_setVersion (HTHost * host, int version)
430: {
431: if (host) host->version = version;
432: }
433:
434: /*
2.43 ! frystyk 435: ** Get and set the cache timeout fHTor persistent entries.
2.1 frystyk 436: ** The default value is TCP_TIMEOUT
437: */
438: PUBLIC void HTHost_setPersistTimeout (time_t timeout)
439: {
2.32 frystyk 440: TcpTtl = timeout;
2.1 frystyk 441: }
442:
443: PUBLIC time_t HTHost_persistTimeout (time_t timeout)
444: {
2.32 frystyk 445: return TcpTtl;
2.1 frystyk 446: }
447:
448: /* Persistent Connection Expiration
449: ** --------------------------------
450: ** Should normally not be used. If, then use calendar time.
451: */
452: PUBLIC void HTHost_setPersistExpires (HTHost * host, time_t expires)
453: {
454: if (host) host->expires = expires;
455: }
456:
457: PUBLIC time_t HTHost_persistExpires (HTHost * host)
458: {
459: return host ? host->expires : -1;
460: }
461:
2.22 eric 462: PUBLIC void HTHost_setReqsPerConnection (HTHost * host, int reqs)
463: {
464: if (host) host->reqsPerConnection = reqs;
465: }
466:
467: PUBLIC int HTHost_reqsPerConnection (HTHost * host)
468: {
469: return host ? host->reqsPerConnection : -1;
470: }
471:
472: PUBLIC void HTHost_setReqsMade (HTHost * host, int reqs)
473: {
474: if (host) host->reqsMade = reqs;
475: }
476:
477: PUBLIC int HTHost_reqsMade (HTHost * host)
478: {
479: return host ? host->reqsMade : -1;
480: }
481:
482:
2.1 frystyk 483: /*
2.6 frystyk 484: ** Public methods for this host
485: */
486: PUBLIC HTMethod HTHost_publicMethods (HTHost * me)
487: {
488: return me ? me->methods : METHOD_INVALID;
489: }
490:
491: PUBLIC void HTHost_setPublicMethods (HTHost * me, HTMethod methodset)
492: {
493: if (me) me->methods = methodset;
494: }
495:
496: PUBLIC void HTHost_appendPublicMethods (HTHost * me, HTMethod methodset)
497: {
498: if (me) me->methods |= methodset;
499: }
500:
501: /*
502: ** Get and set the server name of the remote host
503: */
504: PUBLIC char * HTHost_server (HTHost * host)
505: {
506: return host ? host->server : NULL;
507: }
508:
509: PUBLIC BOOL HTHost_setServer (HTHost * host, const char * server)
510: {
511: if (host && server) {
512: StrAllocCopy(host->server, server);
513: return YES;
514: }
515: return NO;
516: }
517:
518: /*
519: ** Get and set the userAgent name of the remote host
520: */
521: PUBLIC char * HTHost_userAgent (HTHost * host)
522: {
523: return host ? host->user_agent : NULL;
524: }
525:
526: PUBLIC BOOL HTHost_setUserAgent (HTHost * host, const char * userAgent)
527: {
528: if (host && userAgent) {
529: StrAllocCopy(host->user_agent, userAgent);
530: return YES;
2.12 frystyk 531: }
532: return NO;
533: }
534:
535: /*
536: ** Get and set acceptable range units
537: */
538: PUBLIC char * HTHost_rangeUnits (HTHost * host)
539: {
540: return host ? host->range_units : NULL;
541: }
542:
543: PUBLIC BOOL HTHost_setRangeUnits (HTHost * host, const char * units)
544: {
545: if (host && units) {
546: StrAllocCopy(host->range_units, units);
547: return YES;
548: }
549: return NO;
550: }
551:
552: /*
553: ** Checks whether a specific range unit is OK. We always say
554: ** YES except if we have a specific statement from the server that
555: ** it doesn't understand byte ranges - that is - it has sent "none"
556: ** in a "Accept-Range" response header
557: */
558: PUBLIC BOOL HTHost_isRangeUnitAcceptable (HTHost * host, const char * unit)
559: {
560: if (host && unit) {
561: #if 0
562: if (host->range_units) {
563: char * start = strcasestr(host->range_units, "none");
564:
565: /*
566: ** Check that "none" is infact a token. It could be part of some
567: ** other valid string, so we'd better check for it.
568: */
569: if (start) {
570:
571:
572: }
573: return NO;
574: }
575: #endif
576: return strcasecomp(unit, "bytes") ? NO : YES;
2.6 frystyk 577: }
578: return NO;
579: }
580:
2.1 frystyk 581: /* HTHost_catchClose
582: ** -----------------
583: ** This function is registered when the socket is idle so that we get
584: ** a notification if the socket closes at the other end. At this point
585: ** we can't use the request object as it might have been freed a long
586: ** time ago.
587: */
2.13 frystyk 588: PUBLIC int HTHost_catchClose (SOCKET soc, void * context, HTEventType type)
2.1 frystyk 589: {
2.13 frystyk 590: HTNet * net = (HTNet *)context;
591: HTHost * host = net->host;
2.2 frystyk 592: if (CORE_TRACE)
2.13 frystyk 593: HTTrace("Catch Close. called with socket %d with type %x\n",
594: soc, type);
595: if (type == HTEvent_READ) {
2.1 frystyk 596: HTChannel * ch = HTChannel_find(soc); /* Find associated channel */
2.8 frystyk 597: HTHost * host = HTChannel_host(ch); /* and associated host */
2.1 frystyk 598: if (ch && host) {
2.2 frystyk 599: if (CORE_TRACE) HTTrace("Catch Close. CLOSING socket %d\n", soc);
2.8 frystyk 600: HTHost_clearChannel(host, HT_OK);
2.1 frystyk 601: } else {
2.2 frystyk 602: if (CORE_TRACE) HTTrace("Catch Close. socket %d NOT FOUND!\n",soc);
2.1 frystyk 603: }
604: }
2.13 frystyk 605: HTHost_unregister(host, net, HTEvent_CLOSE);
2.1 frystyk 606: return HT_OK;
607: }
608:
609: /*
610: ** As soon as we know that this host accepts persistent connections,
611: ** we associated the channel with the host.
612: ** We don't want more than MaxSockets-2 connections to be persistent in
613: ** order to avoid deadlock.
614: */
2.13 frystyk 615: PUBLIC BOOL HTHost_setPersistent (HTHost * host,
616: BOOL persistent,
617: HTTransportMode mode)
2.1 frystyk 618: {
2.13 frystyk 619: if (!host) return NO;
620:
621: if (!persistent) {
622: /*
623: ** We use the HT_IGNORE status code as we don't want to free
624: ** the stream at this point in time. The situation we want to
625: ** avoid is that we free the channel from within the stream pipe.
626: ** This will lead to an infinite look having the stream freing
627: ** itself.
628: */
2.30 frystyk 629: host->persistent = NO;
2.13 frystyk 630: return HTHost_clearChannel(host, HT_IGNORE);
631: }
632:
2.18 eric 633: /*
634: ** Set the host persistent if not already. Also update the mode to
635: ** the new one - it may have changed
636: */
637: HTHost_setMode(host, mode);
638: if (!host->persistent) {
2.13 frystyk 639: SOCKET sockfd = HTChannel_socket(host->channel);
2.8 frystyk 640: if (sockfd != INVSOC && HTNet_availablePersistentSockets() > 0) {
2.13 frystyk 641: host->persistent = YES;
2.32 frystyk 642: host->expires = time(NULL) + TcpTtl; /* Default timeout */
2.13 frystyk 643: HTChannel_setHost(host->channel, host);
2.8 frystyk 644: HTNet_increasePersistentSocket();
2.2 frystyk 645: if (CORE_TRACE)
2.1 frystyk 646: HTTrace("Host info... added host %p as persistent\n", host);
647: return YES;
648: } else {
2.2 frystyk 649: if (CORE_TRACE)
650: HTTrace("Host info... no room for persistent socket %d\n",
2.7 frystyk 651: sockfd);
2.18 eric 652: return NO;
2.1 frystyk 653: }
2.18 eric 654: } else {
655: if (CORE_TRACE) HTTrace("Host info... %p already persistent\n", host);
656: return YES;
2.1 frystyk 657: }
658: return NO;
659: }
660:
661: /*
2.13 frystyk 662: ** Check whether we have a persistent channel or not
663: */
664: PUBLIC BOOL HTHost_isPersistent (HTHost * host)
665: {
666: return host && host->persistent;
667: }
668:
669: /*
2.1 frystyk 670: ** Find persistent channel associated with this host.
671: */
672: PUBLIC HTChannel * HTHost_channel (HTHost * host)
673: {
674: return host ? host->channel : NULL;
675: }
676:
2.30 frystyk 677:
2.1 frystyk 678: /*
2.30 frystyk 679: ** Check whether we have got a "close" notification, for example in the
680: ** connection header
681: */
682: PUBLIC BOOL HTHost_setCloseNotification (HTHost * host, BOOL mode)
683: {
684: if (host) {
685: host->close_notification = mode;
2.37 frystyk 686: return YES;
2.30 frystyk 687: }
688: return NO;
689: }
690:
691: PUBLIC BOOL HTHost_closeNotification (HTHost * host)
692: {
693: return host && host->close_notification;
694: }
695:
696: /*
2.1 frystyk 697: ** Clear the persistent entry by deleting the channel object. Note that
698: ** the channel object is only deleted if it's not used anymore.
699: */
2.8 frystyk 700: PUBLIC BOOL HTHost_clearChannel (HTHost * host, int status)
2.1 frystyk 701: {
702: if (host && host->channel) {
2.8 frystyk 703: HTChannel_setHost(host->channel, NULL);
2.10 frystyk 704:
2.13 frystyk 705: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
706: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
2.18 eric 707: host->registeredFor = 0;
2.13 frystyk 708:
2.10 frystyk 709: /*
710: ** We don't want to recursively delete ourselves so if we are
711: ** called from within the stream pipe then don't delete the channel
712: ** at this point
713: */
2.8 frystyk 714: HTChannel_delete(host->channel, status);
2.18 eric 715: host->expires = 0;
2.1 frystyk 716: host->channel = NULL;
2.22 eric 717: host->tcpstate = TCP_BEGIN;
718: host->reqsMade = 0;
2.32 frystyk 719: if (HTHost_isPersistent(host)) {
720: HTNet_decreasePersistentSocket();
721: host->persistent = NO;
722: }
723: host->close_notification = NO;
724: host->mode = HT_TP_SINGLE;
725:
2.28 frystyk 726: if (CORE_TRACE) HTTrace("Host info... removed host %p as persistent\n", host);
2.32 frystyk 727:
728: if (!HTList_isEmpty(host->pending)) {
729: if (CORE_TRACE)
730: HTTrace("Host has %d object pending - attempting launch\n", HTList_count(host->pending));
731: HTHost_launchPending(host);
732: }
2.1 frystyk 733: return YES;
734: }
735: return NO;
736: }
737:
2.37 frystyk 738: PUBLIC BOOL HTHost_doRecover (HTHost * host)
739: {
740: return host ? host->do_recover : NO;
741: }
742:
2.1 frystyk 743: /*
2.18 eric 744: ** Move all entries in the pipeline and move the rest to the pending
745: ** queue. They will get launched at a later point in time.
746: */
747: PUBLIC BOOL HTHost_recoverPipe (HTHost * host)
748: {
749: if (host) {
750: int piped = HTList_count(host->pipeline);
751: if (piped > 0) {
752: int cnt;
2.24 frystyk 753: host->recovered++;
2.18 eric 754: if (CORE_TRACE)
2.24 frystyk 755: HTTrace("Host recovered %d times. Moving %d Net objects from pipe line to pending queue\n",
756: host->recovered, piped);
2.18 eric 757:
758: /*
759: ** Unregister this host for all events
760: */
761: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
762: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
763: host->registeredFor = 0;
764:
765: /*
766: ** Set new mode to single until we know what is going on
767: */
768: host->mode = HT_TP_SINGLE;
769:
770: /*
771: ** Move all net objects from the net object to the pending queue.
772: */
773: if (!host->pending) host->pending = HTList_new();
774: for (cnt=0; cnt<piped; cnt++) {
775: HTNet * net = HTList_removeLastObject(host->pipeline);
776: if (CORE_TRACE) HTTrace("Host recover Resetting net object %p\n", net);
777: net->registeredFor = 0;
778: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, HTEvent_RESET);
779: HTList_appendObject(host->pending, net);
780: }
2.37 frystyk 781:
2.18 eric 782: HTChannel_setSemaphore(host->channel, 0);
783: HTHost_clearChannel(host, HT_INTERRUPTED);
2.37 frystyk 784: host->do_recover = NO;
2.18 eric 785: }
2.24 frystyk 786: return YES;
2.18 eric 787: }
788: return NO;
789: }
790:
791: /*
2.8 frystyk 792: ** Handle the connection mode. The mode may change mode in the
793: ** middle of a connection.
794: */
795: PUBLIC HTTransportMode HTHost_mode (HTHost * host, BOOL * active)
796: {
797: return host ? host->mode : HT_TP_SINGLE;
798: }
799:
800: /*
801: ** If the new mode is lower than the old mode then adjust the pipeline
802: ** accordingly. That is, if we are going into single mode then move
803: ** all entries in the pipeline and move the rest to the pending
804: ** queue. They will get launched at a later point in time.
805: */
806: PUBLIC BOOL HTHost_setMode (HTHost * host, HTTransportMode mode)
807: {
808: if (host) {
809: /*
810: ** Check the new mode and see if we must adjust the queues.
811: */
812: if (mode == HT_TP_SINGLE && host->mode > mode) {
813: int piped = HTList_count(host->pipeline);
814: if (piped > 0) {
815: int cnt;
816: if (CORE_TRACE)
817: HTTrace("Host info... Moving %d Net objects from pipe line to pending queue\n", piped);
818: if (!host->pending) host->pending = HTList_new();
819: for (cnt=0; cnt<piped; cnt++) {
2.18 eric 820: HTNet * net = HTList_removeLastObject(host->pipeline);
821: if (CORE_TRACE) HTTrace("Host info... Resetting net object %p\n", net);
2.13 frystyk 822: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, HTEvent_RESET);
2.8 frystyk 823: HTList_appendObject(host->pending, net);
824: }
2.18 eric 825: HTChannel_setSemaphore(host->channel, 0);
826: HTHost_clearChannel(host, HT_INTERRUPTED);
2.8 frystyk 827: }
2.24 frystyk 828: }
829:
830: /*
831: ** If we know that this host is bad then we don't allow anything than
832: ** single mode. We can't recover connections for the rest of our life
833: */
834: if (mode == HT_TP_PIPELINE && host->recovered > MAX_HOST_RECOVER) {
835: if (PROT_TRACE)
836: HTTrace("Host info... %p is bad for pipelining so we won't do it!!!\n",
837: host);
838: } else {
839: host->mode = mode;
840: if (PROT_TRACE)
841: HTTrace("Host info... New mode is %d for host %p\n", host->mode, host);
842: }
2.8 frystyk 843: }
844: return NO;
845: }
846:
847: /*
848: ** Check whether a host is idle meaning if it is ready for a new
849: ** request which depends on the mode of the host. If the host is
850: ** idle, i.e. ready for use then return YES else NO. If the host supports
851: ** persistent connections then still only return idle if no requests are
852: ** ongoing.
853: */
854: PUBLIC BOOL HTHost_isIdle (HTHost * host)
855: {
2.32 frystyk 856: return (host && HTList_isEmpty(host->pipeline));
2.8 frystyk 857: }
858:
2.13 frystyk 859: PRIVATE BOOL _roomInPipe (HTHost * host)
860: {
861: int count;
2.34 frystyk 862: if (!host ||
863: (host->reqsPerConnection && host->reqsMade >= host->reqsPerConnection) ||
864: HTHost_closeNotification(host))
2.32 frystyk 865: return NO;
2.13 frystyk 866: count = HTList_count(host->pipeline);
867: switch (host->mode) {
868: case HT_TP_SINGLE:
869: return count <= 0;
870: case HT_TP_PIPELINE:
871: return count < MAX_PIPES;
872: case HT_TP_INTERLEAVE:
873: return YES;
874: }
875: return NO;
876: }
877:
2.8 frystyk 878: /*
879: ** Add a net object to the host object. If the host
880: ** is idle then add to active list (pipeline) else add
881: ** it to the pending list
882: ** Return HT_PENDING if we must pend, HT_OK, or HT_ERROR
883: */
884: PUBLIC int HTHost_addNet (HTHost * host, HTNet * net)
885: {
886: if (host && net) {
887: int status = HT_OK;
2.32 frystyk 888: BOOL doit = (host->doit==net);
2.42 frystyk 889: BOOL connector = (!host->lock || (host->lock && host->lock==net));
2.8 frystyk 890:
2.18 eric 891: /*
892: ** If we don't have a socket already then check to see if we can get
893: ** one. Otherwise we put the host object into our pending queue.
894: */
895: if (!host->channel && HTNet_availableSockets() <= 0) {
2.8 frystyk 896: if (!PendHost) PendHost = HTList_new();
897: if (CORE_TRACE)
898: HTTrace("Host info... Add Host %p as pending\n", host);
899: HTList_addObject(PendHost, host);
900: status = HT_PENDING;
901: }
902:
2.18 eric 903: /*
904: ** Add net object to either active or pending queue.
905: */
2.42 frystyk 906: if (_roomInPipe(host) && (HTList_isEmpty(host->pending) || doit) && connector) {
2.32 frystyk 907: if (doit) host->doit = NULL;
2.8 frystyk 908: if (!host->pipeline) host->pipeline = HTList_new();
909: HTList_addObject(host->pipeline, net);
2.32 frystyk 910: host->reqsMade++;
911: if (CORE_TRACE)
912: HTTrace("Host info... Add Net %p (request %p) to pipe, %d requests made, %d requests in pipe, %d pending\n",
913: net, net->request, host->reqsMade, HTList_count(host->pipeline), HTList_count(host->pending));
2.18 eric 914:
2.13 frystyk 915: /*
2.30 frystyk 916: ** If we have been idle then make sure we delete the timer
2.13 frystyk 917: */
2.30 frystyk 918: if (host->timer) {
919: HTTimer_delete(host->timer);
920: host->timer = NULL;
921: }
2.40 kahan 922:
923: /*JK: New CBF function
924: ** Call any user-defined callback to say the request will
925: ** be processed.
926: */
927: HTHost_ActivateRequest (net);
2.30 frystyk 928:
2.8 frystyk 929: } else {
930: if (!host->pending) host->pending = HTList_new();
931: HTList_addObject(host->pending, net);
2.32 frystyk 932: if (CORE_TRACE)
933: HTTrace("Host info... Add Net %p (request %p) to pending, %d requests made, %d requests in pipe, %d pending\n",
934: net, net->request, host->reqsMade, HTList_count(host->pipeline), HTList_count(host->pending));
2.8 frystyk 935: status = HT_PENDING;
936: }
937: return status;
938: }
939: return HT_ERROR;
940: }
941:
2.13 frystyk 942: PUBLIC BOOL HTHost_free (HTHost * host, int status)
943: {
2.32 frystyk 944: if (host->channel) {
2.13 frystyk 945:
2.32 frystyk 946: /* Check if we should keep the socket open */
947: if (HTHost_isPersistent(host)) {
2.37 frystyk 948: if (HTHost_closeNotification(host)) {
949: int piped = HTList_count(host->pipeline);
950: if (CORE_TRACE)
951: HTTrace("Host Object. got close notifiation on socket %d\n",
952: HTChannel_socket(host->channel));
953:
954: /*
955: ** If more than a single element (this one) in the pipe
956: ** then we have to recover gracefully
957: */
958: if (piped > 1) {
959: host->reqsPerConnection = host->reqsMade - piped;
960: if (CORE_TRACE)
961: HTTrace("%d requests made, %d in pipe, max %d requests pr connection\n",
962: host->reqsMade, piped, host->reqsPerConnection);
963: host->do_recover = YES;
2.38 frystyk 964: HTChannel_delete(host->channel, status);
965: } else {
966: HTChannel_setSemaphore(host->channel, 0);
967: HTHost_clearChannel(host, status);
2.37 frystyk 968: }
969: } else if ((HTList_count(host->pipeline) <= 1 &&
970: host->reqsMade == host->reqsPerConnection)) {
971: if (CORE_TRACE) HTTrace("Host Object. closing persistent socket %d\n",
972: HTChannel_socket(host->channel));
2.32 frystyk 973:
974: /*
975: ** By lowering the semaphore we make sure that the channel
976: ** is gonna be deleted
977: */
978: HTChannel_setSemaphore(host->channel, 0);
979: HTHost_clearChannel(host, status);
980:
981: } else {
982: if (CORE_TRACE) HTTrace("Host Object. keeping persistent socket %d\n", HTChannel_socket(host->channel));
983: HTChannel_delete(host->channel, status);
984:
985: /*
986: ** If connection is idle then set a timer so that we close the
987: ** connection if idle too long
988: */
989: if (HTHost_isIdle(host) && HTList_isEmpty(host->pending) && !host->timer) {
990: host->timer = HTTimer_new(NULL, TimeoutEvent, host, TCP_IDLE_TTL, YES);
991: if (PROT_TRACE) HTTrace("Host........ Object %p going idle...\n", host);
992: }
993: }
994: return YES;
995: } else {
2.33 frystyk 996: if (CORE_TRACE) HTTrace("Host Object. closing socket %d\n", HTChannel_socket(host->channel));
2.43 ! frystyk 997: HTChannel_setSemaphore(host->channel, 0);
2.41 frystyk 998: HTHost_clearChannel(host, status);
2.32 frystyk 999: }
2.13 frystyk 1000: }
2.32 frystyk 1001: return NO;
2.13 frystyk 1002: }
1003:
2.8 frystyk 1004: PUBLIC BOOL HTHost_deleteNet (HTHost * host, HTNet * net)
1005: {
1006: if (host && net) {
1007: HTList_removeObject(host->pipeline, net);
2.32 frystyk 1008: HTList_removeObject(host->pending, net); /* just to make sure */
2.43 ! frystyk 1009: if (CORE_TRACE) HTTrace("Host info... Removed %p from pipe\n", net);
2.8 frystyk 1010: return YES;
1011: }
1012: return NO;
1013: }
1014:
1015: /*
1016: ** Handle pending host objects.
1017: ** There are two ways we can end up with pending reqyests:
1018: ** 1) If we are out of sockets then register new host objects as pending.
1019: ** 2) If we are pending on a connection then register new net objects as
1020: ** pending
1021: ** This set of functions handles pending host objects and can start new
1022: ** requests as resources get available
1023: */
1024:
1025: /*
1026: ** Check this host object for any pending requests and return the next
1027: ** registered Net object.
1028: */
1029: PUBLIC HTNet * HTHost_nextPendingNet (HTHost * host)
1030: {
1031: HTNet * net = NULL;
2.32 frystyk 1032: if (host && host->pending) {
2.18 eric 1033: /*JK 23/Sep/96 Bug correction. Associated the following lines to the
1034: **above if. There was a missing pair of brackets.
1035: */
1036: if ((net = (HTNet *) HTList_removeFirstObject(host->pending)) != NULL) {
2.32 frystyk 1037: if (CORE_TRACE)
1038: HTTrace("Host info... Popping %p from pending net queue\n", net);
2.33 frystyk 1039: #if 0
1040: {
1041: HTRequest * request = HTNet_request(net);
1042: char * uri = HTAnchor_address((HTAnchor *) HTRequest_anchor(request));
1043: fprintf(stderr, "Popping '%s'\n", uri);
1044: }
1045: #endif
2.32 frystyk 1046: host->doit = net;
2.18 eric 1047: }
2.8 frystyk 1048: }
1049: return net;
1050: }
1051:
1052: /*
2.13 frystyk 1053: ** Return the current list of pending host objects waiting for a socket
2.8 frystyk 1054: */
1055: PUBLIC HTHost * HTHost_nextPendingHost (void)
1056: {
1057: HTHost * host = NULL;
1058: if (PendHost) {
1059: if ((host = (HTHost *) HTList_removeFirstObject(PendHost)) != NULL)
1060: if (PROT_TRACE)
2.32 frystyk 1061: HTTrace("Host info... Popping %p from pending host queue\n",
2.8 frystyk 1062: host);
1063: }
1064: return host;
1065: }
1066:
1067: /*
1068: ** Start the next pending request if any. First we look for pending
1069: ** requests for the same host and then we check for any other pending
1070: ** hosts
1071: */
1072: PUBLIC BOOL HTHost_launchPending (HTHost * host)
1073: {
1074: int available = HTNet_availableSockets();
1075:
1076: if (!host) {
1077: if (PROT_TRACE) HTTrace("Host info... Bad arguments\n");
1078: return NO;
1079: }
1080:
1081: /*
1082: ** Check if we do have resources available for a new request
1083: ** This can either be reusing an existing connection or opening a new one
1084: */
1085: if (available > 0 || host->mode >= HT_TP_PIPELINE) {
2.23 eric 1086: HTNet * net;
2.8 frystyk 1087:
1088: /*
2.13 frystyk 1089: ** In pipeline we can only have one doing writing at a time.
1090: ** We therefore check that there are no other Net object
1091: ** registered for write
1092: */
1093: if (host->mode == HT_TP_PIPELINE) {
2.23 eric 1094: net = (HTNet *) HTList_lastObject(host->pipeline);
1095: if (net && net->registeredFor == HTEvent_WRITE)
2.13 frystyk 1096: return NO;
1097: }
1098:
1099: /*
1100: ** Check the current Host object for pending Net objects
2.23 eric 1101: **
1102: ** Send out as many as will fit in pipe.
2.8 frystyk 1103: */
2.23 eric 1104: while (_roomInPipe(host) && (net = HTHost_nextPendingNet(host))) {
2.40 kahan 1105: int status = NO;
1106: /* JK: Added new code to interrupt pending requests*/
1107: if (DoPendingReqLaunch) {
1108: HTHost_ActivateRequest (net);
1109: if (CORE_TRACE)
1110: HTTrace("Launch pending net object %p with %d reqs in pipe (%d reqs made)\n", net, HTList_count(host->pipeline), host->reqsMade);
1111: status = HTNet_execute(net, HTEvent_WRITE);
1112: } else
1113: {
1114: /* replace the object that was taken off the list */
1115: HTList_appendObject (host->pending, (void *) net);
1116: /* go the the other pending hosts routine */
1117: break;
1118: }
1119:
2.23 eric 1120: if (status != HT_OK)
1121: return status;
2.32 frystyk 1122: }
2.8 frystyk 1123:
1124: /*
1125: ** Check for other pending Host objects
1126: */
1127: {
1128: HTHost * pending = HTHost_nextPendingHost();
1129: if (pending) {
1130: HTNet * net = HTHost_nextPendingNet(pending);
2.40 kahan 1131: if (net) {
1132: if (DoPendingReqLaunch) {
1133: HTHost_ActivateRequest (net);
1134: return HTNet_execute(net, HTEvent_WRITE);
1135: } else {
1136: /* replace the object that was taken off the list */
1137: HTList_appendObject (PendHost, (void *) pending);
1138: return NO;
1139: }
1140: }
2.8 frystyk 1141: }
1142: }
2.13 frystyk 1143: } else
1144: if (PROT_TRACE) HTTrace("Host info... No more requests.\n");
1145: return NO;
1146: }
1147:
1148: PUBLIC HTNet * HTHost_firstNet (HTHost * host)
1149: {
1150: return (HTNet *) HTList_firstObject(host->pipeline);
1151: }
1152:
1153: /*
1154: ** The host event manager keeps track of the state of it's client engines
1155: ** (typically HTTPEvent), accepting multiple blocks on read or write from
1156: ** multiple pipelined engines. It then registers its own engine
1157: ** (HostEvent) with the event manager.
1158: */
1159: PUBLIC int HTHost_connect (HTHost * host, HTNet * net, char * url, HTProtocolId port)
1160: {
2.42 frystyk 1161: HTRequest * request = HTNet_request(net);
2.13 frystyk 1162: int status;
2.42 frystyk 1163: if (!host) {
1164: HTProtocol * protocol = HTNet_protocol(net);
1165: if ((host = HTHost_newWParse(request, url, HTProtocol_id(protocol))) == NULL)
1166: return NO;
1167: if (!host->channel) {
1168: host->forceWriteFlush = YES;
1169: host->lock = net;
1170: }
1171: HTNet_setHost(net, host);
1172: }
1173:
1174: if (!host->lock || (host->lock && host->lock == net)) {
1175: status = HTDoConnect(net, url, port);
1176: if (status == HT_OK) {
1177: host->lock = NULL;
1178: return HT_OK;
1179: }
1180: if (status == HT_WOULD_BLOCK) {
1181: host->lock = net;
1182: return HT_WOULD_BLOCK;
1183: }
1184: if (status == HT_PENDING) return HT_WOULD_BLOCK;
1185: } else {
1186: if ((status = HTHost_addNet(host, net)) == HT_PENDING) {
1187: return HT_PENDING;
1188: }
1189: }
2.13 frystyk 1190: return HT_ERROR; /* @@@ - some more deletion and stuff here? */
1191: }
1192:
1193: /*
1194: ** Rules: SINGLE: one element in pipe, either reading or writing
1195: ** PIPE: n element in pipe, n-1 reading, 1 writing
1196: */
1197: PUBLIC int HTHost_register (HTHost * host, HTNet * net, HTEventType type)
1198: {
2.40 kahan 1199: HTEvent *event;
1200:
2.13 frystyk 1201: if (host && net) {
1202:
2.28 frystyk 1203: if (type == HTEvent_CLOSE) {
2.13 frystyk 1204:
2.28 frystyk 1205: /*
1206: ** Unregister this host for all events
1207: */
1208: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
1209: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
1210: host->registeredFor = 0;
2.13 frystyk 1211: return YES;
2.28 frystyk 1212:
1213: } else {
1214:
1215: /* net object may already be registered */
1216: if (HTEvent_BITS(type) & net->registeredFor)
1217: return NO;
1218: net->registeredFor ^= HTEvent_BITS(type);
1219:
1220: /* host object may already be registered */
1221: if (host->registeredFor & HTEvent_BITS(type))
1222: return YES;
1223: host->registeredFor ^= HTEvent_BITS(type);
2.40 kahan 1224: /* JK: register a request in the event structure */
1225: event = *(host->events+HTEvent_INDEX(type));
1226: event->request = HTNet_request (net);
2.28 frystyk 1227: return HTEvent_register(HTChannel_socket(host->channel),
2.40 kahan 1228: type, event);
2.28 frystyk 1229: }
2.13 frystyk 1230: }
1231: return NO;
1232: }
1233:
1234: PUBLIC int HTHost_unregister (HTHost * host, HTNet * net, HTEventType type)
1235: {
1236: if (host && net) {
1237:
2.28 frystyk 1238: /* net object may not be registered */
2.13 frystyk 1239: if (!(HTEvent_BITS(type) & net->registeredFor))
1240: return NO;
1241: net->registeredFor ^= HTEvent_BITS(type);
1242:
2.28 frystyk 1243: /* host object may not be registered */
2.13 frystyk 1244: if (!(host->registeredFor & HTEvent_BITS(type)))
1245: return YES;
1246: host->registeredFor ^= HTEvent_BITS(type);
1247:
1248: /* stay registered for READ to catch a socket close */
1249: /* WRITE and CONNECT can be unregistered, though */
1250: if ((type == HTEvent_WRITE && isLastInPipe(host, net)) ||
1251: type == HTEvent_CONNECT)
1252: /* if we are blocked downstream, shut down the whole pipe */
1253: HTEvent_unregister(HTChannel_socket(host->channel), type);
1254: return YES;
1255: }
1256: return NO;
1257: }
1258:
1259: /*
1260: ** The reader tells HostEvent that it's stream did not finish the data
1261: */
1262: PUBLIC BOOL HTHost_setRemainingRead (HTHost * host, size_t remaining)
1263: {
1264: if (host == NULL) return NO;
1265: host->remainingRead = remaining;
2.20 frystyk 1266: if (PROT_TRACE) HTTrace("Host........ %d bytes remaining \n", remaining);
2.13 frystyk 1267: return YES;
1268: }
1269:
2.32 frystyk 1270: PUBLIC size_t HTHost_remainingRead (HTHost * host)
1271: {
1272: return host ? host->remainingRead : -1;
1273: }
1274:
2.13 frystyk 1275: PUBLIC SockA * HTHost_getSockAddr (HTHost * host)
1276: {
1277: if (!host) return NULL;
1278: return &host->sock_addr;
1279: }
1280:
1281: PUBLIC BOOL HTHost_setHome (HTHost * host, int home)
1282: {
1283: if (!host) return NO;
1284: host->home = home;
1285: return YES;
1286: }
1287:
1288: PUBLIC int HTHost_home (HTHost * host)
1289: {
1290: if (!host) return 0;
1291: return host->home;
1292: }
1293:
2.27 frystyk 1294: PUBLIC BOOL HTHost_setRetry (HTHost * host, int retry)
1295: {
1296: if (!host) return NO;
1297: host->retry = retry;
1298: return YES;
1299: }
1300:
1301: PUBLIC BOOL HTHost_decreaseRetry (HTHost * host)
1302: {
1303: if (!host) {
1304: if (host->retry > 0) host->retry--;
1305: return YES;
1306: }
1307: return NO;
1308: }
1309:
1310: PUBLIC int HTHost_retry (HTHost * host)
1311: {
1312: if (!host) return 0;
1313: return host->retry;
1314: }
1315:
2.13 frystyk 1316: #if 0 /* Is a macro right now */
2.21 frystyk 1317: PRIVATE BOOL HTHost_setDNS5 (HTHost * host, HTdns * dns)
2.13 frystyk 1318: {
1319: if (!host) return NO;
1320: host->dns = dns;
1321: return YES;
1322: }
1323: #endif
1324:
1325: PUBLIC BOOL HTHost_setChannel (HTHost * host, HTChannel * channel)
1326: {
1327: if (!host) return NO;
1328: host->channel = channel;
1329: return YES;
1330: }
1331:
1332: PUBLIC HTNet * HTHost_getReadNet(HTHost * host)
1333: {
2.38 frystyk 1334: return host ? (HTNet *) HTList_firstObject(host->pipeline) : NULL;
2.13 frystyk 1335: }
1336:
1337: PUBLIC HTNet * HTHost_getWriteNet(HTHost * host)
1338: {
1339: return host ? (HTNet *) HTList_lastObject(host->pipeline) : NULL;
1340: }
1341:
1342: /*
1343: ** Create the input stream and bind it to the channel
1344: ** Please read the description in the HTIOStream module for the parameters
1345: */
1346: PUBLIC HTInputStream * HTHost_getInput (HTHost * host, HTTransport * tp,
1347: void * param, int mode)
1348: {
1349: if (host && host->channel && tp) {
1350: HTChannel * ch = host->channel;
1351: HTInputStream * input = (*tp->input_new)(host, ch, param, mode);
1352: HTChannel_setInput(ch, input);
1353: return HTChannel_getChannelIStream(ch);
1354: }
2.24 frystyk 1355: if (CORE_TRACE) HTTrace("Host Object. Can't create input stream\n");
2.13 frystyk 1356: return NULL;
1357: }
1358:
1359: PUBLIC HTOutputStream * HTHost_getOutput (HTHost * host, HTTransport * tp,
1360: void * param, int mode)
1361: {
1362: if (host && host->channel && tp) {
1363: HTChannel * ch = host->channel;
1364: HTOutputStream * output = (*tp->output_new)(host, ch, param, mode);
1365: HTChannel_setOutput(ch, output);
1366: return output;
1367: }
2.24 frystyk 1368: if (CORE_TRACE) HTTrace("Host Object. Can't create output stream\n");
2.13 frystyk 1369: return NULL;
1370: }
1371:
1372: PUBLIC HTOutputStream * HTHost_output (HTHost * host, HTNet * net)
1373: {
1374: if (host && host->channel && net) {
1375: HTOutputStream * output = HTChannel_output(host->channel);
1376: return output;
1377: }
1378: return NULL;
1379: }
1380:
1381: PUBLIC int HTHost_read(HTHost * host, HTNet * net)
1382: {
1383: HTInputStream * input = HTChannel_input(host->channel);
1384: if (net != HTHost_getReadNet(host)) {
1385: HTHost_register(host, net, HTEvent_READ);
1386: return HT_WOULD_BLOCK;
1387: }
2.17 frystyk 1388:
1389: /*
1390: ** If there is no input channel then this can either mean that
1391: ** we have lost the channel or an error occurred. We return
1392: ** HT_CLOSED as this is a sign to the caller that we don't
1393: ** have a channel
1394: */
1395: return input ? (*input->isa->read)(input) : HT_CLOSED;
2.13 frystyk 1396: }
1397:
1398: PUBLIC BOOL HTHost_setConsumed(HTHost * host, size_t bytes)
1399: {
1400: HTInputStream * input;
1401: if (!host || !host->channel) return NO;
1402: if ((input = HTChannel_input(host->channel)) == NULL)
1403: return NO;
2.32 frystyk 1404: if (CORE_TRACE)
2.20 frystyk 1405: HTTrace("Host........ passing %d bytes as consumed to %p\n", bytes, input);
2.13 frystyk 1406: return (*input->isa->consumed)(input, bytes);
1407: }
1408:
1409: PUBLIC int HTHost_hash (HTHost * host)
1410: {
1411: return host ? host->hash : -1;
1412: }
1413:
2.26 frystyk 1414: PUBLIC BOOL HTHost_setWriteDelay (HTHost * host, ms_t delay)
2.13 frystyk 1415: {
2.26 frystyk 1416: if (host && delay >= 0) {
1417: host->delay = delay;
1418: return YES;
1419: }
1420: return NO;
1421: }
1422:
1423: PUBLIC ms_t HTHost_writeDelay (HTHost * host)
1424: {
1425: return host ? host->delay : 0;
1426: }
1427:
1428: PUBLIC int HTHost_findWriteDelay (HTHost * host, ms_t lastFlushTime, int buffSize)
1429: {
2.35 frystyk 1430: #if 0
2.15 eric 1431: unsigned short mtu;
2.18 eric 1432: int ret = -1;
2.15 eric 1433: int socket = HTChannel_socket(host->channel);
2.18 eric 1434: #ifndef WWW_MSWINDOWS
2.15 eric 1435: ret = ioctl(socket, 666, (unsigned long)&mtu);
2.18 eric 1436: #endif /* WWW_MSWINDOWS */
2.15 eric 1437: if ((ret == 0 && buffSize >= mtu) || host->forceWriteFlush)
2.13 frystyk 1438: return 0;
2.26 frystyk 1439: return host->delay;
2.35 frystyk 1440: #else
1441: return host->forceWriteFlush ? 0 : host->delay;
1442: #endif
2.13 frystyk 1443: }
1444:
2.26 frystyk 1445: PUBLIC BOOL HTHost_setDefaultWriteDelay (ms_t delay)
1446: {
1447: if (delay >= 0) {
1448: WriteDelay = delay;
1449: if (CORE_TRACE) HTTrace("Host........ Default write delay is %d ms\n", delay);
1450: return YES;
1451: }
1452: return NO;
1453: }
1454:
1455: PUBLIC ms_t HTHost_defaultWriteDelay (void)
1456: {
1457: return WriteDelay;
1458: }
1459:
2.13 frystyk 1460: PUBLIC int HTHost_forceFlush(HTHost * host)
1461: {
2.35 frystyk 1462: HTNet * targetNet = (HTNet *) HTList_lastObject(host->pipeline);
2.13 frystyk 1463: int ret;
2.35 frystyk 1464: if (targetNet == NULL) return HT_ERROR;
2.13 frystyk 1465: if (CORE_TRACE)
2.28 frystyk 1466: HTTrace("Host Event.. FLUSH passed to `%s\'\n",
1467: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 1468: host->forceWriteFlush = YES;
1469: ret = (*targetNet->event.cbf)(HTChannel_socket(host->channel), targetNet->event.param, HTEvent_FLUSH);
2.35 frystyk 1470: host->forceWriteFlush = NO;
2.13 frystyk 1471: return ret;
2.39 frystyk 1472: }
1473:
1474: /*
1475: ** Context pointer to be used as a user defined context
1476: */
1477: PUBLIC void HTHost_setContext (HTHost * me, void * context)
1478: {
2.40 kahan 1479: if (me) me->context = context;
2.39 frystyk 1480: }
1481:
1482: PUBLIC void * HTHost_context (HTHost * me)
1483: {
2.40 kahan 1484: return me ? me->context : NULL;
2.1 frystyk 1485: }
2.11 kahan 1486:
2.13 frystyk 1487: PUBLIC int HTHost_eventTimeout (void)
1488: {
1489: return EventTimeout;
1490: }
2.11 kahan 1491:
2.13 frystyk 1492: PUBLIC void HTHost_setEventTimeout (int millis)
1493: {
1494: EventTimeout = millis;
1495: if (CORE_TRACE) HTTrace("Host........ Setting event timeout to %d ms\n", millis);
1496: }
2.40 kahan 1497:
1498:
1499: PUBLIC void HTHost_setActivateRequestCallback (HTHost_ActivateRequestCallback *
1500: cbf)
1501: {
1502: if (CORE_TRACE) HTTrace("HTHost....... registering %p\n", cbf);
1503: ActivateReqCBF = cbf;
1504: }
1505:
1506: PRIVATE int HTHost_ActivateRequest (HTNet *net)
1507: {
1508: HTRequest *request;
1509:
1510: if (!ActivateReqCBF) {
2.42 frystyk 1511: if (CORE_TRACE) HTTrace("HTHost...... No ActivateRequest "
2.40 kahan 1512: "callback handler registered\n");
1513: return -1;
1514: }
1515:
1516: request = HTNet_request (net);
1517: return (*ActivateReqCBF) (request);
1518: }
1519:
1520: PUBLIC void HTHost_disable_PendingReqLaunch (void)
1521: {
1522: DoPendingReqLaunch = NO;
1523: }
1524:
1525: PUBLIC void HTHost_enable_PendingReqLaunch (void)
1526: {
1527: DoPendingReqLaunch = YES;
1528: }
1529:
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