Annotation of libwww/Library/src/HTHost.c, revision 2.31
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.
2.31 ! frystyk 6: ** @(#) $Id: HTHost.c,v 2.30 1997/04/05 00:25:27 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:
2.31 ! frystyk 28: #ifdef HT_MUX
! 29: #include "WWWMux.h"
! 30: #endif
! 31:
2.1 frystyk 32: #define HOST_TIMEOUT 43200L /* Default host timeout is 12 h */
2.29 frystyk 33:
34: /*
35: ** After the connection management draft by Jim Gettys, we have changed this
36: ** to 60 secs instead of an hour
37: */
38: #define TCP_TIMEOUT 60L /* Default TCP timeout is 60s */
39:
2.19 frystyk 40: #define MAX_PIPES 50 /* maximum number of pipelined requests */
2.24 frystyk 41: #define MAX_HOST_RECOVER 3 /* Max number of auto recovery */
2.27 frystyk 42: #define DEFAULT_DELAY 50 /* Default write flush delay in ms */
2.1 frystyk 43:
2.13 frystyk 44: struct _HTInputStream {
45: const HTInputStreamClass * isa;
2.1 frystyk 46: };
47:
2.13 frystyk 48: PRIVATE int HostEvent(SOCKET soc, void * pVoid, HTEventType type);
49:
50: /* Type definitions and global variables etc. local to this module */
2.1 frystyk 51: PRIVATE time_t HostTimeout = HOST_TIMEOUT; /* Timeout on host entries */
52: PRIVATE time_t TCPTimeout = TCP_TIMEOUT; /* Timeout on persistent channels */
53:
2.8 frystyk 54: PRIVATE HTList ** HostTable = NULL;
55: PRIVATE HTList * PendHost = NULL; /* List of pending host elements */
2.1 frystyk 56:
2.13 frystyk 57: PRIVATE int EventTimeout = -1; /* Global Host event timeout */
58:
2.26 frystyk 59: PRIVATE WriteDelay = DEFAULT_DELAY; /* Delay in ms */
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: }
2.28 frystyk 175: HTTrace("Host Event.. Who wants to write to `%s\'?\n", host->hostname);
2.13 frystyk 176: return HT_ERROR;
2.14 frystyk 177: } else if (type == HTEvent_TIMEOUT) {
178:
179: if (CORE_TRACE)
180: HTTrace("Host Event.. WE SHOULD DELETE ALL REQUEST ON `%s\'?\n",
181: host->hostname);
2.13 frystyk 182:
2.14 frystyk 183: } else {
2.28 frystyk 184: HTTrace("Don't know how to handle OOB data from `%s\'?\n",
2.14 frystyk 185: host->hostname);
186: }
2.13 frystyk 187: return HT_OK;
188: }
189:
2.30 frystyk 190: PRIVATE int TimeoutEvent (HTTimer * timer, void * param, HTEventType type)
191: {
192: HTHost * host = (HTHost *) param;
193: SOCKET sockfd = HTChannel_socket(host->channel);
194: int result = HostEvent (sockfd, host, HTEvent_CLOSE);
195: HTTimer_delete(timer);
196: host->timer = NULL;
197: return result;
198: }
199:
2.1 frystyk 200: /*
201: ** Search the host info cache for a host object or create a new one
202: ** and add it. Examples of host names are
203: **
204: ** www.w3.org
205: ** www.foo.com:8000
206: ** 18.52.0.18
207: **
208: ** Returns Host object or NULL if error. You may get back an already
209: ** existing host object - you're not guaranteed a new one each time.
210: */
2.13 frystyk 211:
2.15 eric 212: PUBLIC HTHost * HTHost_new (char * host, u_short u_port)
2.1 frystyk 213: {
214: HTList * list = NULL; /* Current list in cache */
215: HTHost * pres = NULL;
2.13 frystyk 216: int hash = 0;
2.1 frystyk 217: if (!host) {
2.2 frystyk 218: if (CORE_TRACE) HTTrace("Host info... Bad argument\n");
2.1 frystyk 219: return NULL;
220: }
221:
222: /* Find a hash for this host */
223: {
224: char *ptr;
225: for (ptr=host; *ptr; ptr++)
2.13 frystyk 226: hash = (int) ((hash * 3 + (*(unsigned char *) ptr)) % HOST_HASH_SIZE);
2.1 frystyk 227: if (!HostTable) {
2.13 frystyk 228: if ((HostTable = (HTList **) HT_CALLOC(HOST_HASH_SIZE,
2.1 frystyk 229: sizeof(HTList *))) == NULL)
230: HT_OUTOFMEM("HTHost_find");
231: }
232: if (!HostTable[hash]) HostTable[hash] = HTList_new();
233: list = HostTable[hash];
234: }
235:
236: /* Search the cache */
237: {
238: HTList * cur = list;
239: while ((pres = (HTHost *) HTList_nextObject(cur))) {
2.15 eric 240: if (!strcmp(pres->hostname, host) && u_port == pres->u_port) {
2.8 frystyk 241: if (HTHost_isIdle(pres) && time(NULL)>pres->ntime+HostTimeout){
2.2 frystyk 242: if (CORE_TRACE)
2.1 frystyk 243: HTTrace("Host info... Collecting host info %p\n",pres);
244: delete_object(list, pres);
245: pres = NULL;
246: }
247: break;
248: }
249: }
250: }
251:
2.8 frystyk 252: /* If not found then create new Host object, else use existing one */
2.1 frystyk 253: if (pres) {
254: if (pres->channel) {
2.13 frystyk 255: if (pres->expires && pres->expires < time(NULL)) { /* Cached channel is cold */
2.2 frystyk 256: if (CORE_TRACE)
2.1 frystyk 257: HTTrace("Host info... Persistent channel %p gotten cold\n",
258: pres->channel);
2.5 eric 259: HTChannel_delete(pres->channel, HT_OK);
2.1 frystyk 260: pres->channel = NULL;
261: } else {
2.2 frystyk 262: if (CORE_TRACE)
2.1 frystyk 263: HTTrace("Host info... REUSING CHANNEL %p\n",pres->channel);
264: }
265: }
266: } else {
267: if ((pres = (HTHost *) HT_CALLOC(1, sizeof(HTHost))) == NULL)
268: HT_OUTOFMEM("HTHost_add");
2.13 frystyk 269: pres->hash = hash;
2.1 frystyk 270: StrAllocCopy(pres->hostname, host);
2.15 eric 271: pres->u_port = u_port;
2.1 frystyk 272: pres->ntime = time(NULL);
2.8 frystyk 273: pres->mode = HT_TP_SINGLE;
2.26 frystyk 274: pres->delay = WriteDelay;
2.18 eric 275: {
2.26 frystyk 276: int i;
277: for (i = 0; i < HTEvent_TYPES; i++)
278: pres->events[i]= HTEvent_new(HostEvent, pres, HT_PRIORITY_MAX, EventTimeout);
2.18 eric 279: }
2.2 frystyk 280: if (CORE_TRACE)
2.24 frystyk 281: HTTrace("Host info... added `%s\' with host %p to list %p\n",
282: host, pres, list);
2.1 frystyk 283: HTList_addObject(list, (void *) pres);
284: }
285: return pres;
2.9 frystyk 286: }
287:
2.15 eric 288: PUBLIC HTHost * HTHost_newWParse (HTRequest * request, char * url, u_short u_port)
2.13 frystyk 289: {
290: char * port;
291: char * fullhost = NULL;
292: char * parsedHost = NULL;
293: SockA * sin;
294: HTHost * me;
295: char * proxy = HTRequest_proxy(request);
296:
297: fullhost = HTParse(proxy ? proxy : url, "", PARSE_HOST);
298:
299: /* If there's an @ then use the stuff after it as a hostname */
300: if (fullhost) {
301: char * at_sign;
302: if ((at_sign = strchr(fullhost, '@')) != NULL)
303: parsedHost = at_sign+1;
304: else
305: parsedHost = fullhost;
306: }
307: if (!parsedHost || !*parsedHost) {
308: HTRequest_addError(request, ERR_FATAL, NO, HTERR_NO_HOST,
309: NULL, 0, "HTDoConnect");
310: HT_FREE(fullhost);
311: return NULL;
312: }
313: port = strchr(parsedHost, ':');
314: if (PROT_TRACE)
315: HTTrace("HTDoConnect. Looking up `%s\'\n", parsedHost);
316: if (port) {
317: *port++ = '\0';
318: if (!*port || !isdigit(*port))
319: port = 0;
2.24 frystyk 320: u_port = (u_short) atol(port);
2.13 frystyk 321: }
322: /* Find information about this host */
2.15 eric 323: if ((me = HTHost_new(parsedHost, u_port)) == NULL) {
2.13 frystyk 324: if (PROT_TRACE)HTTrace("HTDoConnect. Can't get host info\n");
325: me->tcpstate = TCP_ERROR;
326: return NULL;
327: }
328: sin = &me->sock_addr;
329: memset((void *) sin, '\0', sizeof(SockA));
330: #ifdef DECNET
331: sin->sdn_family = AF_DECnet;
332: net->sock_addr.sdn_objnum = port ? (unsigned char)(strtol(port, (char **) 0, 10)) : DNP_OBJ;
333: #else /* Internet */
334: sin->sin_family = AF_INET;
2.15 eric 335: sin->sin_port = htons(u_port);
2.13 frystyk 336: #endif
337: HT_FREE(fullhost); /* parsedHost points into fullhost */
338: return me;
339: }
340:
2.9 frystyk 341: /*
342: ** Search the host info cache for a host object. Examples of host names:
343: **
344: ** www.w3.org
345: ** www.foo.com:8000
346: ** 18.52.0.18
347: **
348: ** Returns Host object or NULL if not found.
349: */
350: PUBLIC HTHost * HTHost_find (char * host)
351: {
352: HTList * list = NULL; /* Current list in cache */
353: HTHost * pres = NULL;
354: if (CORE_TRACE)
355: HTTrace("Host info... Looking for `%s\'\n", host ? host : "<null>");
356:
357: /* Find a hash for this host */
358: if (host && HostTable) {
359: int hash = 0;
360: char *ptr;
361: for (ptr=host; *ptr; ptr++)
2.13 frystyk 362: hash = (int) ((hash * 3 + (*(unsigned char *) ptr)) % HOST_HASH_SIZE);
2.9 frystyk 363: if (!HostTable[hash]) return NULL;
364: list = HostTable[hash];
365:
366: /* Search the cache */
367: {
368: HTList * cur = list;
369: while ((pres = (HTHost *) HTList_nextObject(cur))) {
370: if (!strcmp(pres->hostname, host)) {
371: if (time(NULL) > pres->ntime + HostTimeout) {
372: if (CORE_TRACE)
373: HTTrace("Host info... Collecting host %p\n", pres);
374: delete_object(list, pres);
375: pres = NULL;
376: } else {
377: if (CORE_TRACE)
378: HTTrace("Host info... Found `%s\'\n", host);
379: }
380: return pres;
381: }
382: }
383: }
384: }
385: return NULL;
2.1 frystyk 386: }
387:
388: /*
2.8 frystyk 389: ** Get and set the hostname of the remote host
390: */
391: PUBLIC char * HTHost_name (HTHost * host)
392: {
393: return host ? host->hostname : NULL;
394: }
395:
396: /*
2.1 frystyk 397: ** Get and set the type class of the remote host
398: */
399: PUBLIC char * HTHost_class (HTHost * host)
400: {
401: return host ? host->type : NULL;
402: }
403:
404: PUBLIC void HTHost_setClass (HTHost * host, char * s_class)
405: {
406: if (host && s_class) StrAllocCopy(host->type, s_class);
407: }
408:
409: /*
410: ** Get and set the version of the remote host
411: */
412: PUBLIC int HTHost_version (HTHost *host)
413: {
414: return host ? host->version : 0;
415: }
416:
417: PUBLIC void HTHost_setVersion (HTHost * host, int version)
418: {
419: if (host) host->version = version;
420: }
421:
422: /*
423: ** Get and set the cache timeout for persistent entries.
424: ** The default value is TCP_TIMEOUT
425: */
426: PUBLIC void HTHost_setPersistTimeout (time_t timeout)
427: {
428: TCPTimeout = timeout;
429: }
430:
431: PUBLIC time_t HTHost_persistTimeout (time_t timeout)
432: {
433: return TCPTimeout;
434: }
435:
436: /* Persistent Connection Expiration
437: ** --------------------------------
438: ** Should normally not be used. If, then use calendar time.
439: */
440: PUBLIC void HTHost_setPersistExpires (HTHost * host, time_t expires)
441: {
442: if (host) host->expires = expires;
443: }
444:
445: PUBLIC time_t HTHost_persistExpires (HTHost * host)
446: {
447: return host ? host->expires : -1;
448: }
449:
2.22 eric 450: PUBLIC void HTHost_setReqsPerConnection (HTHost * host, int reqs)
451: {
452: if (host) host->reqsPerConnection = reqs;
453: }
454:
455: PUBLIC int HTHost_reqsPerConnection (HTHost * host)
456: {
457: return host ? host->reqsPerConnection : -1;
458: }
459:
460: PUBLIC void HTHost_setReqsMade (HTHost * host, int reqs)
461: {
462: if (host) host->reqsMade = reqs;
463: }
464:
465: PUBLIC int HTHost_reqsMade (HTHost * host)
466: {
467: return host ? host->reqsMade : -1;
468: }
469:
470:
2.1 frystyk 471: /*
2.6 frystyk 472: ** Public methods for this host
473: */
474: PUBLIC HTMethod HTHost_publicMethods (HTHost * me)
475: {
476: return me ? me->methods : METHOD_INVALID;
477: }
478:
479: PUBLIC void HTHost_setPublicMethods (HTHost * me, HTMethod methodset)
480: {
481: if (me) me->methods = methodset;
482: }
483:
484: PUBLIC void HTHost_appendPublicMethods (HTHost * me, HTMethod methodset)
485: {
486: if (me) me->methods |= methodset;
487: }
488:
489: /*
490: ** Get and set the server name of the remote host
491: */
492: PUBLIC char * HTHost_server (HTHost * host)
493: {
494: return host ? host->server : NULL;
495: }
496:
497: PUBLIC BOOL HTHost_setServer (HTHost * host, const char * server)
498: {
499: if (host && server) {
500: StrAllocCopy(host->server, server);
501: return YES;
502: }
503: return NO;
504: }
505:
506: /*
507: ** Get and set the userAgent name of the remote host
508: */
509: PUBLIC char * HTHost_userAgent (HTHost * host)
510: {
511: return host ? host->user_agent : NULL;
512: }
513:
514: PUBLIC BOOL HTHost_setUserAgent (HTHost * host, const char * userAgent)
515: {
516: if (host && userAgent) {
517: StrAllocCopy(host->user_agent, userAgent);
518: return YES;
2.12 frystyk 519: }
520: return NO;
521: }
522:
523: /*
524: ** Get and set acceptable range units
525: */
526: PUBLIC char * HTHost_rangeUnits (HTHost * host)
527: {
528: return host ? host->range_units : NULL;
529: }
530:
531: PUBLIC BOOL HTHost_setRangeUnits (HTHost * host, const char * units)
532: {
533: if (host && units) {
534: StrAllocCopy(host->range_units, units);
535: return YES;
536: }
537: return NO;
538: }
539:
540: /*
541: ** Checks whether a specific range unit is OK. We always say
542: ** YES except if we have a specific statement from the server that
543: ** it doesn't understand byte ranges - that is - it has sent "none"
544: ** in a "Accept-Range" response header
545: */
546: PUBLIC BOOL HTHost_isRangeUnitAcceptable (HTHost * host, const char * unit)
547: {
548: if (host && unit) {
549: #if 0
550: if (host->range_units) {
551: char * start = strcasestr(host->range_units, "none");
552:
553: /*
554: ** Check that "none" is infact a token. It could be part of some
555: ** other valid string, so we'd better check for it.
556: */
557: if (start) {
558:
559:
560: }
561: return NO;
562: }
563: #endif
564: return strcasecomp(unit, "bytes") ? NO : YES;
2.6 frystyk 565: }
566: return NO;
567: }
568:
2.1 frystyk 569: /* HTHost_catchClose
570: ** -----------------
571: ** This function is registered when the socket is idle so that we get
572: ** a notification if the socket closes at the other end. At this point
573: ** we can't use the request object as it might have been freed a long
574: ** time ago.
575: */
2.13 frystyk 576: PUBLIC int HTHost_catchClose (SOCKET soc, void * context, HTEventType type)
2.1 frystyk 577: {
2.13 frystyk 578: HTNet * net = (HTNet *)context;
579: HTHost * host = net->host;
2.2 frystyk 580: if (CORE_TRACE)
2.13 frystyk 581: HTTrace("Catch Close. called with socket %d with type %x\n",
582: soc, type);
583: if (type == HTEvent_READ) {
2.1 frystyk 584: HTChannel * ch = HTChannel_find(soc); /* Find associated channel */
2.8 frystyk 585: HTHost * host = HTChannel_host(ch); /* and associated host */
2.1 frystyk 586: if (ch && host) {
2.2 frystyk 587: if (CORE_TRACE) HTTrace("Catch Close. CLOSING socket %d\n", soc);
2.8 frystyk 588: HTHost_clearChannel(host, HT_OK);
2.1 frystyk 589: } else {
2.2 frystyk 590: if (CORE_TRACE) HTTrace("Catch Close. socket %d NOT FOUND!\n",soc);
2.1 frystyk 591: }
592: }
2.13 frystyk 593: HTHost_unregister(host, net, HTEvent_CLOSE);
2.1 frystyk 594: return HT_OK;
595: }
596:
597: /*
598: ** As soon as we know that this host accepts persistent connections,
599: ** we associated the channel with the host.
600: ** We don't want more than MaxSockets-2 connections to be persistent in
601: ** order to avoid deadlock.
602: */
2.13 frystyk 603: PUBLIC BOOL HTHost_setPersistent (HTHost * host,
604: BOOL persistent,
605: HTTransportMode mode)
2.1 frystyk 606: {
2.13 frystyk 607: if (!host) return NO;
608:
609: if (!persistent) {
610: /*
611: ** We use the HT_IGNORE status code as we don't want to free
612: ** the stream at this point in time. The situation we want to
613: ** avoid is that we free the channel from within the stream pipe.
614: ** This will lead to an infinite look having the stream freing
615: ** itself.
616: */
2.30 frystyk 617: host->persistent = NO;
2.13 frystyk 618: return HTHost_clearChannel(host, HT_IGNORE);
619: }
620:
2.18 eric 621: /*
622: ** Set the host persistent if not already. Also update the mode to
623: ** the new one - it may have changed
624: */
625: HTHost_setMode(host, mode);
626: if (!host->persistent) {
2.13 frystyk 627: SOCKET sockfd = HTChannel_socket(host->channel);
2.8 frystyk 628: if (sockfd != INVSOC && HTNet_availablePersistentSockets() > 0) {
2.13 frystyk 629: host->persistent = YES;
2.1 frystyk 630: host->expires = time(NULL) + TCPTimeout; /* Default timeout */
2.13 frystyk 631: HTChannel_setHost(host->channel, host);
2.8 frystyk 632: HTNet_increasePersistentSocket();
2.2 frystyk 633: if (CORE_TRACE)
2.1 frystyk 634: HTTrace("Host info... added host %p as persistent\n", host);
635: return YES;
636: } else {
2.2 frystyk 637: if (CORE_TRACE)
638: HTTrace("Host info... no room for persistent socket %d\n",
2.7 frystyk 639: sockfd);
2.18 eric 640: return NO;
2.1 frystyk 641: }
2.18 eric 642: } else {
643: if (CORE_TRACE) HTTrace("Host info... %p already persistent\n", host);
644: return YES;
2.1 frystyk 645: }
646: return NO;
647: }
648:
649: /*
2.13 frystyk 650: ** Check whether we have a persistent channel or not
651: */
652: PUBLIC BOOL HTHost_isPersistent (HTHost * host)
653: {
654: return host && host->persistent;
655: }
656:
657: /*
2.1 frystyk 658: ** Find persistent channel associated with this host.
659: */
660: PUBLIC HTChannel * HTHost_channel (HTHost * host)
661: {
662: return host ? host->channel : NULL;
663: }
664:
2.30 frystyk 665:
2.1 frystyk 666: /*
2.30 frystyk 667: ** Check whether we have got a "close" notification, for example in the
668: ** connection header
669: */
670: PUBLIC BOOL HTHost_setCloseNotification (HTHost * host, BOOL mode)
671: {
672: if (host) {
673: host->close_notification = mode;
674: return NO;
675: }
676: return NO;
677: }
678:
679: PUBLIC BOOL HTHost_closeNotification (HTHost * host)
680: {
681: return host && host->close_notification;
682: }
683:
684: /*
2.1 frystyk 685: ** Clear the persistent entry by deleting the channel object. Note that
686: ** the channel object is only deleted if it's not used anymore.
687: */
2.8 frystyk 688: PUBLIC BOOL HTHost_clearChannel (HTHost * host, int status)
2.1 frystyk 689: {
690: if (host && host->channel) {
2.8 frystyk 691: HTChannel_setHost(host->channel, NULL);
2.10 frystyk 692:
2.13 frystyk 693: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
694: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
2.18 eric 695: host->registeredFor = 0;
2.13 frystyk 696:
2.10 frystyk 697: /*
698: ** We don't want to recursively delete ourselves so if we are
699: ** called from within the stream pipe then don't delete the channel
700: ** at this point
701: */
2.8 frystyk 702: HTChannel_delete(host->channel, status);
2.18 eric 703: host->expires = 0;
2.1 frystyk 704: host->channel = NULL;
2.22 eric 705: host->tcpstate = TCP_BEGIN;
706: host->reqsMade = 0;
2.28 frystyk 707: if (HTHost_isPersistent(host)) HTNet_decreasePersistentSocket();
708: if (CORE_TRACE) HTTrace("Host info... removed host %p as persistent\n", host);
2.1 frystyk 709: return YES;
710: }
711: return NO;
712: }
713:
714: /*
2.18 eric 715: ** Move all entries in the pipeline and move the rest to the pending
716: ** queue. They will get launched at a later point in time.
717: */
718: PUBLIC BOOL HTHost_recoverPipe (HTHost * host)
719: {
720: if (host) {
721: int piped = HTList_count(host->pipeline);
722: if (piped > 0) {
723: int cnt;
2.24 frystyk 724: host->recovered++;
2.18 eric 725: if (CORE_TRACE)
2.24 frystyk 726: HTTrace("Host recovered %d times. Moving %d Net objects from pipe line to pending queue\n",
727: host->recovered, piped);
2.18 eric 728:
729: /*
730: ** Unregister this host for all events
731: */
732: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
733: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
734: host->registeredFor = 0;
735:
736: /*
737: ** Set new mode to single until we know what is going on
738: */
739: host->mode = HT_TP_SINGLE;
740:
741: /*
742: ** Move all net objects from the net object to the pending queue.
743: */
744: if (!host->pending) host->pending = HTList_new();
745: for (cnt=0; cnt<piped; cnt++) {
746: HTNet * net = HTList_removeLastObject(host->pipeline);
747: if (CORE_TRACE) HTTrace("Host recover Resetting net object %p\n", net);
748: net->registeredFor = 0;
749: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, HTEvent_RESET);
750: HTList_appendObject(host->pending, net);
751: }
752: HTChannel_setSemaphore(host->channel, 0);
753: HTHost_clearChannel(host, HT_INTERRUPTED);
754: }
2.24 frystyk 755: #if 0
756: /*
757: ** We don't wanna change state here
758: */
2.18 eric 759: return HTHost_launchPending(host);
2.24 frystyk 760: #else
761: return YES;
762: #endif
2.18 eric 763: }
764: return NO;
765: }
766:
767: /*
2.8 frystyk 768: ** Handle the connection mode. The mode may change mode in the
769: ** middle of a connection.
770: */
771: PUBLIC HTTransportMode HTHost_mode (HTHost * host, BOOL * active)
772: {
773: return host ? host->mode : HT_TP_SINGLE;
774: }
775:
776: /*
777: ** If the new mode is lower than the old mode then adjust the pipeline
778: ** accordingly. That is, if we are going into single mode then move
779: ** all entries in the pipeline and move the rest to the pending
780: ** queue. They will get launched at a later point in time.
781: */
782: PUBLIC BOOL HTHost_setMode (HTHost * host, HTTransportMode mode)
783: {
784: if (host) {
785: /*
786: ** Check the new mode and see if we must adjust the queues.
787: */
788: if (mode == HT_TP_SINGLE && host->mode > mode) {
789: int piped = HTList_count(host->pipeline);
790: if (piped > 0) {
791: int cnt;
792: if (CORE_TRACE)
793: HTTrace("Host info... Moving %d Net objects from pipe line to pending queue\n", piped);
794: if (!host->pending) host->pending = HTList_new();
795: for (cnt=0; cnt<piped; cnt++) {
2.18 eric 796: HTNet * net = HTList_removeLastObject(host->pipeline);
797: if (CORE_TRACE) HTTrace("Host info... Resetting net object %p\n", net);
2.13 frystyk 798: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, HTEvent_RESET);
2.8 frystyk 799: HTList_appendObject(host->pending, net);
800: }
2.18 eric 801: HTChannel_setSemaphore(host->channel, 0);
802: HTHost_clearChannel(host, HT_INTERRUPTED);
2.8 frystyk 803: }
2.24 frystyk 804: }
805:
806: /*
807: ** If we know that this host is bad then we don't allow anything than
808: ** single mode. We can't recover connections for the rest of our life
809: */
810: if (mode == HT_TP_PIPELINE && host->recovered > MAX_HOST_RECOVER) {
811: if (PROT_TRACE)
812: HTTrace("Host info... %p is bad for pipelining so we won't do it!!!\n",
813: host);
814: } else {
815: host->mode = mode;
816: if (PROT_TRACE)
817: HTTrace("Host info... New mode is %d for host %p\n", host->mode, host);
818: }
2.8 frystyk 819: }
820: return NO;
821: }
822:
823: /*
824: ** Check whether a host is idle meaning if it is ready for a new
825: ** request which depends on the mode of the host. If the host is
826: ** idle, i.e. ready for use then return YES else NO. If the host supports
827: ** persistent connections then still only return idle if no requests are
828: ** ongoing.
829: */
830: PUBLIC BOOL HTHost_isIdle (HTHost * host)
831: {
832: return (host && HTList_count(host->pipeline) <= 0);
833: }
834:
2.13 frystyk 835: PRIVATE BOOL _roomInPipe (HTHost * host)
836: {
837: int count;
838: if (!host) return NO;
2.22 eric 839: if (host->reqsPerConnection && host->reqsMade >= host->reqsPerConnection)
840: return 0;
2.13 frystyk 841: count = HTList_count(host->pipeline);
842: switch (host->mode) {
843: case HT_TP_SINGLE:
844: return count <= 0;
845: case HT_TP_PIPELINE:
846: return count < MAX_PIPES;
847: case HT_TP_INTERLEAVE:
848: return YES;
849: }
850: return NO;
851: }
852:
2.8 frystyk 853: /*
854: ** Add a net object to the host object. If the host
855: ** is idle then add to active list (pipeline) else add
856: ** it to the pending list
857: ** Return HT_PENDING if we must pend, HT_OK, or HT_ERROR
858: */
859: PUBLIC int HTHost_addNet (HTHost * host, HTNet * net)
860: {
861: if (host && net) {
862: int status = HT_OK;
863:
2.18 eric 864: /*
865: ** If we don't have a socket already then check to see if we can get
866: ** one. Otherwise we put the host object into our pending queue.
867: */
868: if (!host->channel && HTNet_availableSockets() <= 0) {
2.8 frystyk 869: if (!PendHost) PendHost = HTList_new();
870: if (CORE_TRACE)
871: HTTrace("Host info... Add Host %p as pending\n", host);
872: HTList_addObject(PendHost, host);
873: status = HT_PENDING;
874: }
875:
2.18 eric 876: /*
877: ** Add net object to either active or pending queue.
878: */
2.13 frystyk 879: if (_roomInPipe(host)) {
2.30 frystyk 880: if (CORE_TRACE)
881: HTTrace("Host info... Add Net %p to pipeline of host %p\n", net, host);
2.8 frystyk 882: if (!host->pipeline) host->pipeline = HTList_new();
883: HTList_addObject(host->pipeline, net);
2.18 eric 884:
2.13 frystyk 885: /*
2.30 frystyk 886: ** If we have been idle then make sure we delete the timer
2.13 frystyk 887: */
2.30 frystyk 888: if (host->timer) {
889: HTTimer_delete(host->timer);
890: host->timer = NULL;
891: }
892:
2.8 frystyk 893: } else {
894: if (CORE_TRACE) HTTrace("Host info... Add Net %p as pending\n", net);
895: if (!host->pending) host->pending = HTList_new();
896: HTList_addObject(host->pending, net);
897: status = HT_PENDING;
898: }
899: return status;
900: }
901: return HT_ERROR;
902: }
903:
2.13 frystyk 904: PUBLIC BOOL HTHost_free (HTHost * host, int status)
905: {
906: if (host->channel == NULL) return NO;
2.25 frystyk 907: #if 0
2.23 eric 908: if (host->persistent && !(host->reqsMade >= host->reqsPerConnection && HTList_count(host->pipeline) <= 1))
2.25 frystyk 909: #else
910: /* Check this with FTP as well */
2.30 frystyk 911: if (host->persistent && !host->close_notification &&
2.25 frystyk 912: (!host->reqsPerConnection ||
913: (host->reqsPerConnection && host->reqsMade < host->reqsPerConnection)))
914: #endif
2.23 eric 915: {
2.13 frystyk 916: if (CORE_TRACE)
917: HTTrace("Host Object. keeping socket %d\n", HTChannel_socket(host->channel));
918: HTChannel_delete(host->channel, status);
919: } else {
920: if (CORE_TRACE)
921: HTTrace("Host Object. closing socket %d\n", HTChannel_socket(host->channel));
922:
923: /*
924: ** By lowering the semaphore we make sure that the channel
925: ** is gonna be deleted
926: */
2.23 eric 927: #if 1
928: HTChannel_downSemaphore(host->channel);
929: HTHost_clearChannel(host, status);
930: #else
2.13 frystyk 931: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
932: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
933: host->registeredFor = 0;
934: HTChannel_downSemaphore(host->channel);
935: HTChannel_delete(host->channel, status);
936: host->channel = NULL;
2.22 eric 937: host->tcpstate = TCP_BEGIN;
2.23 eric 938: #endif
2.13 frystyk 939: }
940: return YES;
941: }
942:
2.8 frystyk 943: PUBLIC BOOL HTHost_deleteNet (HTHost * host, HTNet * net)
944: {
945: if (host && net) {
946: if (CORE_TRACE)
947: HTTrace("Host info... Remove Net %p from pipe line\n", net);
948: HTList_removeObject(host->pipeline, net);
949: HTList_removeObject(host->pending, net);
2.30 frystyk 950:
951: /*
952: ** If connection is idle then set a timer so that we close the
953: ** connection if idle too long
954: */
955: if (HTHost_isPersistent(host) && HTList_isEmpty(host->pipeline)
956: && !host->timer) {
957: host->timer = HTTimer_new(NULL, TimeoutEvent, host, TCPTimeout*1000, YES);
958: if (PROT_TRACE) HTTrace("Host........ Object %p going idle...\n", host);
959: }
2.8 frystyk 960: return YES;
961: }
962: return NO;
963: }
964:
965: /*
966: ** Handle pending host objects.
967: ** There are two ways we can end up with pending reqyests:
968: ** 1) If we are out of sockets then register new host objects as pending.
969: ** 2) If we are pending on a connection then register new net objects as
970: ** pending
971: ** This set of functions handles pending host objects and can start new
972: ** requests as resources get available
973: */
974:
975: /*
976: ** Check this host object for any pending requests and return the next
977: ** registered Net object.
978: */
979: PUBLIC HTNet * HTHost_nextPendingNet (HTHost * host)
980: {
981: HTNet * net = NULL;
982: if (host && host->pending && host->pipeline) {
2.18 eric 983: /*JK 23/Sep/96 Bug correction. Associated the following lines to the
984: **above if. There was a missing pair of brackets.
985: */
986: if ((net = (HTNet *) HTList_removeFirstObject(host->pending)) != NULL) {
987: if (PROT_TRACE)
988: HTTrace("Host info... Popping %p from pending net queue\n", net);
2.22 eric 989: /* HTList_addObject(host->pipeline, net); */
2.18 eric 990: }
2.8 frystyk 991: }
992: return net;
993: }
994:
995: /*
2.13 frystyk 996: ** Return the current list of pending host objects waiting for a socket
2.8 frystyk 997: */
998: PUBLIC HTHost * HTHost_nextPendingHost (void)
999: {
1000: HTHost * host = NULL;
1001: if (PendHost) {
1002: if ((host = (HTHost *) HTList_removeFirstObject(PendHost)) != NULL)
1003: if (PROT_TRACE)
1004: HTTrace("Host info... Poping %p from pending host queue\n",
1005: host);
1006: }
1007: return host;
1008: }
1009:
1010: /*
1011: ** Start the next pending request if any. First we look for pending
1012: ** requests for the same host and then we check for any other pending
1013: ** hosts
1014: */
1015: PUBLIC BOOL HTHost_launchPending (HTHost * host)
1016: {
1017: int available = HTNet_availableSockets();
1018:
1019: if (!host) {
1020: if (PROT_TRACE) HTTrace("Host info... Bad arguments\n");
1021: return NO;
1022: }
1023:
1024: /*
1025: ** Check if we do have resources available for a new request
1026: ** This can either be reusing an existing connection or opening a new one
1027: */
1028: if (available > 0 || host->mode >= HT_TP_PIPELINE) {
2.23 eric 1029: HTNet * net;
2.8 frystyk 1030:
1031: /*
2.13 frystyk 1032: ** In pipeline we can only have one doing writing at a time.
1033: ** We therefore check that there are no other Net object
1034: ** registered for write
1035: */
1036: if (host->mode == HT_TP_PIPELINE) {
2.23 eric 1037: net = (HTNet *) HTList_lastObject(host->pipeline);
1038: if (net && net->registeredFor == HTEvent_WRITE)
2.13 frystyk 1039: return NO;
1040: }
1041:
1042: /*
1043: ** Check the current Host object for pending Net objects
2.23 eric 1044: **
1045: ** Send out as many as will fit in pipe.
2.8 frystyk 1046: */
2.23 eric 1047: while (_roomInPipe(host) && (net = HTHost_nextPendingNet(host))) {
1048: int status = HTNet_execute(net, HTEvent_WRITE);
1049: if (status != HT_OK)
1050: return status;
2.8 frystyk 1051: }
1052:
1053: /*
1054: ** Check for other pending Host objects
1055: */
1056: {
1057: HTHost * pending = HTHost_nextPendingHost();
1058: if (pending) {
1059: HTNet * net = HTHost_nextPendingNet(pending);
2.13 frystyk 1060: if (net) return HTNet_execute(net, HTEvent_WRITE);
2.8 frystyk 1061: }
1062: }
2.13 frystyk 1063: } else
1064: if (PROT_TRACE) HTTrace("Host info... No more requests.\n");
1065: return NO;
1066: }
1067:
1068: PUBLIC HTNet * HTHost_firstNet (HTHost * host)
1069: {
1070: return (HTNet *) HTList_firstObject(host->pipeline);
1071: }
1072:
1073: /*
1074: ** The host event manager keeps track of the state of it's client engines
1075: ** (typically HTTPEvent), accepting multiple blocks on read or write from
1076: ** multiple pipelined engines. It then registers its own engine
1077: ** (HostEvent) with the event manager.
1078: */
1079: PUBLIC int HTHost_connect (HTHost * host, HTNet * net, char * url, HTProtocolId port)
1080: {
1081: int status;
2.18 eric 1082: /* if (host && host->connecttime)
2.13 frystyk 1083: return HT_OK;
2.18 eric 1084: */
2.13 frystyk 1085: status = HTDoConnect(net, url, port);
2.22 eric 1086: if (status == HT_OK) {
1087: HTNet_host(net)->reqsMade++; /* @@@ - what if there's a connect but no req sent? */
2.13 frystyk 1088: return HT_OK;
2.22 eric 1089: }
2.13 frystyk 1090: if (status == HT_WOULD_BLOCK || status == HT_PENDING)
1091: return HT_WOULD_BLOCK;
1092: return HT_ERROR; /* @@@ - some more deletion and stuff here? */
1093: }
1094:
1095: /*
1096: ** Rules: SINGLE: one element in pipe, either reading or writing
1097: ** PIPE: n element in pipe, n-1 reading, 1 writing
1098: */
1099: PUBLIC int HTHost_register (HTHost * host, HTNet * net, HTEventType type)
1100: {
1101: if (host && net) {
1102:
2.28 frystyk 1103: if (type == HTEvent_CLOSE) {
2.13 frystyk 1104:
2.28 frystyk 1105: /*
1106: ** Unregister this host for all events
1107: */
1108: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
1109: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
1110: host->registeredFor = 0;
2.13 frystyk 1111: return YES;
2.28 frystyk 1112:
1113: } else {
1114:
1115: /* net object may already be registered */
1116: if (HTEvent_BITS(type) & net->registeredFor)
1117: return NO;
1118: net->registeredFor ^= HTEvent_BITS(type);
1119:
1120: /* host object may already be registered */
1121: if (host->registeredFor & HTEvent_BITS(type))
1122: return YES;
1123: host->registeredFor ^= HTEvent_BITS(type);
1124: return HTEvent_register(HTChannel_socket(host->channel),
1125: type, *(host->events+HTEvent_INDEX(type)));
1126: }
2.13 frystyk 1127: }
1128: return NO;
1129: }
1130:
1131: PUBLIC int HTHost_unregister (HTHost * host, HTNet * net, HTEventType type)
1132: {
1133: if (host && net) {
1134:
2.28 frystyk 1135: /* net object may not be registered */
2.13 frystyk 1136: if (!(HTEvent_BITS(type) & net->registeredFor))
1137: return NO;
1138: net->registeredFor ^= HTEvent_BITS(type);
1139:
2.28 frystyk 1140: /* host object may not be registered */
2.13 frystyk 1141: if (!(host->registeredFor & HTEvent_BITS(type)))
1142: return YES;
1143: host->registeredFor ^= HTEvent_BITS(type);
1144:
1145: /* stay registered for READ to catch a socket close */
1146: /* WRITE and CONNECT can be unregistered, though */
1147: if ((type == HTEvent_WRITE && isLastInPipe(host, net)) ||
1148: type == HTEvent_CONNECT)
1149: /* if we are blocked downstream, shut down the whole pipe */
1150: HTEvent_unregister(HTChannel_socket(host->channel), type);
1151: return YES;
1152: }
1153: return NO;
1154: }
1155:
1156: /*
1157: ** The reader tells HostEvent that it's stream did not finish the data
1158: */
1159: PUBLIC BOOL HTHost_setRemainingRead (HTHost * host, size_t remaining)
1160: {
1161: if (host == NULL) return NO;
1162: host->remainingRead = remaining;
2.20 frystyk 1163: if (PROT_TRACE) HTTrace("Host........ %d bytes remaining \n", remaining);
2.13 frystyk 1164: return YES;
1165: }
1166:
1167: PUBLIC SockA * HTHost_getSockAddr (HTHost * host)
1168: {
1169: if (!host) return NULL;
1170: return &host->sock_addr;
1171: }
1172:
1173: PUBLIC BOOL HTHost_setHome (HTHost * host, int home)
1174: {
1175: if (!host) return NO;
1176: host->home = home;
1177: return YES;
1178: }
1179:
1180: PUBLIC int HTHost_home (HTHost * host)
1181: {
1182: if (!host) return 0;
1183: return host->home;
1184: }
1185:
2.27 frystyk 1186: PUBLIC BOOL HTHost_setRetry (HTHost * host, int retry)
1187: {
1188: if (!host) return NO;
1189: host->retry = retry;
1190: return YES;
1191: }
1192:
1193: PUBLIC BOOL HTHost_decreaseRetry (HTHost * host)
1194: {
1195: if (!host) {
1196: if (host->retry > 0) host->retry--;
1197: return YES;
1198: }
1199: return NO;
1200: }
1201:
1202: PUBLIC int HTHost_retry (HTHost * host)
1203: {
1204: if (!host) return 0;
1205: return host->retry;
1206: }
1207:
2.13 frystyk 1208: #if 0 /* Is a macro right now */
2.21 frystyk 1209: PRIVATE BOOL HTHost_setDNS5 (HTHost * host, HTdns * dns)
2.13 frystyk 1210: {
1211: if (!host) return NO;
1212: host->dns = dns;
1213: return YES;
1214: }
1215: #endif
1216:
1217: PUBLIC BOOL HTHost_setChannel (HTHost * host, HTChannel * channel)
1218: {
1219: if (!host) return NO;
1220: host->channel = channel;
1221: return YES;
1222: }
1223:
1224: PUBLIC HTNet * HTHost_getReadNet(HTHost * host)
1225: {
1226: if (host) {
1227: if (host->mode == HT_TP_INTERLEAVE) {
2.21 frystyk 1228: #ifdef HT_MUX
2.13 frystyk 1229: HTMuxChannel * muxch = HTMuxChannel_find(host);
1230: return HTMuxChannel_net(muxch);
2.21 frystyk 1231: #endif
2.13 frystyk 1232: }
1233: return (HTNet *) HTList_firstObject(host->pipeline);
1234: }
1235: return NULL;
1236: }
1237:
1238: PUBLIC HTNet * HTHost_getWriteNet(HTHost * host)
1239: {
1240: return host ? (HTNet *) HTList_lastObject(host->pipeline) : NULL;
1241: }
1242:
1243: /*
1244: ** Create the input stream and bind it to the channel
1245: ** Please read the description in the HTIOStream module for the parameters
1246: */
1247: PUBLIC HTInputStream * HTHost_getInput (HTHost * host, HTTransport * tp,
1248: void * param, int mode)
1249: {
1250: if (host && host->channel && tp) {
1251: HTChannel * ch = host->channel;
1252: HTInputStream * input = (*tp->input_new)(host, ch, param, mode);
1253: HTChannel_setInput(ch, input);
1254: return HTChannel_getChannelIStream(ch);
1255: }
2.24 frystyk 1256: if (CORE_TRACE) HTTrace("Host Object. Can't create input stream\n");
2.13 frystyk 1257: return NULL;
1258: }
1259:
1260: PUBLIC HTOutputStream * HTHost_getOutput (HTHost * host, HTTransport * tp,
1261: void * param, int mode)
1262: {
1263: if (host && host->channel && tp) {
1264: HTChannel * ch = host->channel;
1265: HTOutputStream * output = (*tp->output_new)(host, ch, param, mode);
1266: HTChannel_setOutput(ch, output);
1267: return output;
1268: }
2.24 frystyk 1269: if (CORE_TRACE) HTTrace("Host Object. Can't create output stream\n");
2.13 frystyk 1270: return NULL;
1271: }
1272:
1273: PUBLIC HTOutputStream * HTHost_output (HTHost * host, HTNet * net)
1274: {
1275: if (host && host->channel && net) {
1276: HTOutputStream * output = HTChannel_output(host->channel);
2.8 frystyk 1277:
1278: /*
2.13 frystyk 1279: ** If we are in MUX mode then create new output stream on top
1280: ** of the already existing one. Otherwise just return what we
1281: ** have.
2.8 frystyk 1282: */
2.13 frystyk 1283: if (host->mode == HT_TP_INTERLEAVE) {
2.21 frystyk 1284: #ifdef HT_MUX
2.13 frystyk 1285: HTStream * target = (HTStream *) HTChannel_output(host->channel);
1286: output = HTMuxWriter_new(host, net, target);
2.21 frystyk 1287: #endif
2.8 frystyk 1288: }
2.13 frystyk 1289: return output;
1290: }
1291: return NULL;
1292: }
1293:
1294: PUBLIC int HTHost_read(HTHost * host, HTNet * net)
1295: {
1296: HTInputStream * input = HTChannel_input(host->channel);
1297: if (net != HTHost_getReadNet(host)) {
1298: HTHost_register(host, net, HTEvent_READ);
1299: return HT_WOULD_BLOCK;
1300: }
2.17 frystyk 1301:
1302: /*
1303: ** If there is no input channel then this can either mean that
1304: ** we have lost the channel or an error occurred. We return
1305: ** HT_CLOSED as this is a sign to the caller that we don't
1306: ** have a channel
1307: */
1308: return input ? (*input->isa->read)(input) : HT_CLOSED;
2.13 frystyk 1309: }
1310:
1311: PUBLIC BOOL HTHost_setConsumed(HTHost * host, size_t bytes)
1312: {
1313: HTInputStream * input;
1314: if (!host || !host->channel) return NO;
1315: if ((input = HTChannel_input(host->channel)) == NULL)
1316: return NO;
2.20 frystyk 1317: if (PROT_TRACE)
1318: HTTrace("Host........ passing %d bytes as consumed to %p\n", bytes, input);
2.13 frystyk 1319: return (*input->isa->consumed)(input, bytes);
1320: }
1321:
1322: PUBLIC int HTHost_hash (HTHost * host)
1323: {
1324: return host ? host->hash : -1;
1325: }
1326:
2.26 frystyk 1327: PUBLIC BOOL HTHost_setWriteDelay (HTHost * host, ms_t delay)
2.13 frystyk 1328: {
2.26 frystyk 1329: if (host && delay >= 0) {
1330: host->delay = delay;
1331: return YES;
1332: }
1333: return NO;
1334: }
1335:
1336: PUBLIC ms_t HTHost_writeDelay (HTHost * host)
1337: {
1338: return host ? host->delay : 0;
1339: }
1340:
1341: PUBLIC int HTHost_findWriteDelay (HTHost * host, ms_t lastFlushTime, int buffSize)
1342: {
2.15 eric 1343: unsigned short mtu;
2.18 eric 1344: int ret = -1;
2.15 eric 1345: int socket = HTChannel_socket(host->channel);
2.18 eric 1346: #ifndef WWW_MSWINDOWS
2.15 eric 1347: ret = ioctl(socket, 666, (unsigned long)&mtu);
2.18 eric 1348: #endif /* WWW_MSWINDOWS */
2.15 eric 1349: if ((ret == 0 && buffSize >= mtu) || host->forceWriteFlush)
2.13 frystyk 1350: return 0;
2.26 frystyk 1351: return host->delay;
2.13 frystyk 1352: }
1353:
2.26 frystyk 1354: PUBLIC BOOL HTHost_setDefaultWriteDelay (ms_t delay)
1355: {
1356: if (delay >= 0) {
1357: WriteDelay = delay;
1358: if (CORE_TRACE) HTTrace("Host........ Default write delay is %d ms\n", delay);
1359: return YES;
1360: }
1361: return NO;
1362: }
1363:
1364: PUBLIC ms_t HTHost_defaultWriteDelay (void)
1365: {
1366: return WriteDelay;
1367: }
1368:
2.13 frystyk 1369: PUBLIC int HTHost_forceFlush(HTHost * host)
1370: {
1371: HTNet * targetNet = (HTNet *)HTList_lastObject(host->pipeline);
1372: int wasForced = host->forceWriteFlush;
1373: int ret;
1374: if (targetNet == NULL)
1375: return HT_ERROR;
1376: if (CORE_TRACE)
2.28 frystyk 1377: HTTrace("Host Event.. FLUSH passed to `%s\'\n",
1378: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 1379: host->forceWriteFlush = YES;
1380: ret = (*targetNet->event.cbf)(HTChannel_socket(host->channel), targetNet->event.param, HTEvent_FLUSH);
1381: host->forceWriteFlush = wasForced;
1382: return ret;
2.1 frystyk 1383: }
2.11 kahan 1384:
2.13 frystyk 1385: PUBLIC int HTHost_eventTimeout (void)
1386: {
1387: return EventTimeout;
1388: }
2.11 kahan 1389:
2.13 frystyk 1390: PUBLIC void HTHost_setEventTimeout (int millis)
1391: {
1392: EventTimeout = millis;
1393: if (CORE_TRACE) HTTrace("Host........ Setting event timeout to %d ms\n", millis);
1394: }
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTHost.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src