Annotation of libwww/Library/src/HTHost.c, revision 2.55
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.
2.55 ! frystyk 6: ** @(#) $Id: HTHost.c,v 2.54 1998/12/15 05:34:28 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 */
2.44 frystyk 16: #include "wwwsys.h"
2.1 frystyk 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:
2.48 frystyk 28: #define HOST_OBJECT_TTL 43200L /* Default host timeout is 12 h */
2.29 frystyk 29:
2.48 frystyk 30: #define TCP_IDLE_PASSIVE 120L /* Passive TTL in s on an idle connection */
31: #define TCP_IDLE_ACTIVE 60000L /* Active TTL in ms on an idle connection */
2.29 frystyk 32:
2.45 frystyk 33: #define MAX_PIPES 50 /* maximum number of pipelined requests */
2.50 frystyk 34: #define MAX_HOST_RECOVER 1 /* 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 */
2.48 frystyk 44: PRIVATE time_t HostTimeout = HOST_OBJECT_TTL; /* Timeout for host objects */
2.53 frystyk 45: PRIVATE time_t HTPassiveTimeout = TCP_IDLE_PASSIVE; /* Passive timeout in s */
46: PRIVATE ms_t HTActiveTimeout = TCP_IDLE_ACTIVE; /* Active timeout in ms */
2.1 frystyk 47:
2.8 frystyk 48: PRIVATE HTList ** HostTable = NULL;
49: PRIVATE HTList * PendHost = NULL; /* List of pending host elements */
2.1 frystyk 50:
2.40 kahan 51: /* JK: New functions for interruption the automatic pending request
52: activation */
53: PRIVATE HTHost_ActivateRequestCallback * ActivateReqCBF = NULL;
54: PRIVATE int HTHost_ActivateRequest (HTNet *net);
55: PRIVATE BOOL DoPendingReqLaunch = YES; /* controls automatic activation
56: of pending requests */
57:
2.13 frystyk 58: PRIVATE int EventTimeout = -1; /* Global Host event timeout */
59:
2.36 frystyk 60: PRIVATE ms_t WriteDelay = DEFAULT_DELAY; /* Delay in ms */
2.26 frystyk 61:
2.45 frystyk 62: PRIVATE int MaxPipelinedRequests = MAX_PIPES;
63:
2.1 frystyk 64: /* ------------------------------------------------------------------------- */
65:
66: PRIVATE void free_object (HTHost * me)
67: {
68: if (me) {
2.30 frystyk 69: int i;
2.1 frystyk 70: HT_FREE(me->hostname);
71: HT_FREE(me->type);
2.12 frystyk 72: HT_FREE(me->server);
73: HT_FREE(me->user_agent);
74: HT_FREE(me->range_units);
2.30 frystyk 75:
76: /* Delete the channel (if any) */
2.3 eric 77: if (me->channel) {
2.5 eric 78: HTChannel_delete(me->channel, HT_OK);
2.3 eric 79: me->channel = NULL;
80: }
2.30 frystyk 81:
82: /* Unregister the events */
2.18 eric 83: for (i = 0; i < HTEvent_TYPES; i++)
84: HTEvent_delete(me->events[i]);
2.30 frystyk 85:
86: /* Delete the timer (if any) */
87: if (me->timer) HTTimer_delete(me->timer);
88:
89: /* Delete the queues */
2.8 frystyk 90: HTList_delete(me->pipeline);
91: HTList_delete(me->pending);
2.1 frystyk 92: HT_FREE(me);
93: }
94: }
95:
96: PRIVATE BOOL delete_object (HTList * list, HTHost * me)
97: {
2.2 frystyk 98: if (CORE_TRACE) HTTrace("Host info... object %p from list %p\n", me, list);
2.1 frystyk 99: HTList_removeObject(list, (void *) me);
100: free_object(me);
101: return YES;
102: }
103:
2.13 frystyk 104: PRIVATE BOOL isLastInPipe (HTHost * host, HTNet * net)
105: {
106: return HTList_lastObject(host->pipeline) == net;
107: }
108:
2.51 frystyk 109: PRIVATE BOOL killPipeline (HTHost * host, HTEventType type)
2.48 frystyk 110: {
111: if (host) {
112: int piped = HTList_count(host->pipeline);
113: int pending = HTList_count(host->pending);
114: int cnt;
115:
2.51 frystyk 116: if (CORE_TRACE)
117: HTTrace("Host kill... Pipeline due to %s event\n", HTEvent_type2str(type));
118:
2.48 frystyk 119: /* Terminate all net objects in pending queue */
120: for (cnt=0; cnt<pending; cnt++) {
121: HTNet * net = HTList_removeLastObject(host->pending);
2.51 frystyk 122: if (CORE_TRACE) HTTrace("Host kill... Terminating net object %p from pending queue\n", net);
2.48 frystyk 123: net->registeredFor = 0;
2.51 frystyk 124: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, type);
2.48 frystyk 125: }
126:
127: /* Terminate all net objects in pipeline */
128: if (piped >= 1) {
129:
2.51 frystyk 130: #if 0
2.48 frystyk 131: /*
132: ** Unregister this host for all events
133: */
134: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
135: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
136: host->registeredFor = 0;
137:
138: /*
139: ** Set new mode to single until we know what is going on
140: */
141: host->mode = HT_TP_SINGLE;
2.51 frystyk 142: #endif
2.48 frystyk 143: /*
144: ** Terminte all net objects in the pipeline
145: */
146: for (cnt=0; cnt<piped; cnt++) {
147: HTNet * net = HTList_firstObject(host->pipeline);
2.51 frystyk 148: if (CORE_TRACE) HTTrace("Host kill... Terminating net object %p from pipe line\n", net);
2.48 frystyk 149: net->registeredFor = 0;
2.51 frystyk 150: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, type);
2.48 frystyk 151: }
152:
2.51 frystyk 153: #if 0
2.48 frystyk 154: HTChannel_setSemaphore(host->channel, 0);
155: HTHost_clearChannel(host, HT_INTERRUPTED);
2.51 frystyk 156: #endif
2.48 frystyk 157:
158: }
159: return YES;
160: }
161: return NO;
162: }
163:
164: /*
2.51 frystyk 165: ** Silently close an idle persistent connection after
2.53 frystyk 166: ** HTActiveTimeout secs
2.51 frystyk 167: */
168: PRIVATE int IdleTimeoutEvent (HTTimer * timer, void * param, HTEventType type)
169: {
170: HTHost * host = (HTHost *) param;
171: SOCKET sockfd = HTChannel_socket(host->channel);
172: int result = HostEvent (sockfd, host, HTEvent_CLOSE);
173: HTTimer_delete(timer);
174: host->timer = NULL;
175: return result;
176: }
177:
178: /*
2.13 frystyk 179: ** HostEvent - host event manager - recieves events from the event
180: ** manager and dispatches them to the client net objects by calling the
181: ** net object's cbf.
182: **
183: */
184: PRIVATE int HostEvent (SOCKET soc, void * pVoid, HTEventType type)
185: {
186: HTHost * host = (HTHost *)pVoid;
187:
2.18 eric 188: if (type == HTEvent_READ || type == HTEvent_CLOSE) {
2.13 frystyk 189: HTNet * targetNet;
190:
191: /* call the first net object */
192: do {
193: int ret;
2.49 frystyk 194:
195: /* netscape and apache servers can do a lazy close well after usage
196: * of previous socket has been dispensed by the library,
197: * the section below makes sure the event does not get miss attributed
198: */
199: if (HTChannel_socket(host->channel) != soc) {
200: if (CORE_TRACE)
201: HTTrace("Host Event.. wild socket %d type = %s real socket is %d\n", soc,
202: type == HTEvent_CLOSE ? "Event_Close" : "Event_Read",
203: HTChannel_socket(host->channel));
204: return HT_OK;
205: }
206:
2.13 frystyk 207: targetNet = (HTNet *)HTList_firstObject(host->pipeline);
208: if (targetNet) {
209: if (CORE_TRACE)
2.28 frystyk 210: HTTrace("Host Event.. READ passed to `%s\'\n",
211: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 212: if ((ret = (*targetNet->event.cbf)(HTChannel_socket(host->channel),
213: targetNet->event.param, type)) != HT_OK)
214: return ret;
215: }
216: if (targetNet == NULL && host->remainingRead > 0) {
2.31 frystyk 217: if (CORE_TRACE)
218: HTTrace("HostEvent... Error: %d bytes left to read and nowhere to put them\n",
219: host->remainingRead);
2.13 frystyk 220: host->remainingRead = 0;
221: /*
222: ** Fall through to close the channel
223: */
224: }
225: /* call pipelined net object to eat all the data in the channel */
226: } while (host->remainingRead > 0);
227:
228: /* last target net should have set remainingRead to 0 */
229: if (targetNet)
230: return HT_OK;
231:
232: /* If there was notargetNet, it should be a close */
2.28 frystyk 233: if (CORE_TRACE)
234: HTTrace("Host Event.. host %p `%s\' closed connection.\n",
235: host, host->hostname);
2.13 frystyk 236:
237: /* Is there garbage in the channel? Let's check: */
238: {
239: char buf[256];
240: int ret;
2.28 frystyk 241: memset(buf, '\0', sizeof(buf));
2.48 frystyk 242: while ((ret = NETREAD(HTChannel_socket(host->channel), buf, sizeof(buf)-1)) > 0) {
2.28 frystyk 243: if (CORE_TRACE)
244: HTTrace("Host Event.. Host %p `%s\' had %d extraneous bytes: `%s\'\n",
245: host, host->hostname, ret, buf);
246: memset(buf, '\0', sizeof(buf));
247: }
2.13 frystyk 248: }
249: HTHost_clearChannel(host, HT_OK);
2.28 frystyk 250: return HT_OK; /* extra garbage does not constitute an application error */
2.13 frystyk 251:
2.18 eric 252: } else if (type == HTEvent_WRITE || type == HTEvent_CONNECT) {
2.13 frystyk 253: HTNet * targetNet = (HTNet *)HTList_lastObject(host->pipeline);
254: if (targetNet) {
255: if (CORE_TRACE)
2.28 frystyk 256: HTTrace("Host Event.. WRITE passed to `%s\'\n",
257: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 258: return (*targetNet->event.cbf)(HTChannel_socket(host->channel), targetNet->event.param, type);
259: }
2.55 ! frystyk 260: HTTrace("Host Event Host %p (`%s\') dispatched with event %d but doesn't have a target - %d requests made, %d requests in pipe, %d pending\n",
! 261: host, host ? host->hostname : "<null>", type,
! 262: host, host->reqsMade,
! 263: HTList_count(host->pipeline), HTList_count(host->pending));
! 264: #if 0
! 265: HTDebugBreak(__FILE__, __LINE__, "Host Event.. Host %p (`%s\') dispatched with event %d\n",
! 266: host, host ? host->hostname : "<null>", type);
2.13 frystyk 267: return HT_ERROR;
2.55 ! frystyk 268: #else
! 269: return HT_OK;
! 270: #endif
2.14 frystyk 271: } else if (type == HTEvent_TIMEOUT) {
2.51 frystyk 272: killPipeline(host, HTEvent_TIMEOUT);
2.14 frystyk 273: } else {
2.44 frystyk 274: HTTrace("Don't know how to handle OOB data from `%s\'?\n",
275: host->hostname);
2.14 frystyk 276: }
2.13 frystyk 277: return HT_OK;
278: }
279:
2.1 frystyk 280: /*
281: ** Search the host info cache for a host object or create a new one
282: ** and add it. Examples of host names are
283: **
284: ** www.w3.org
285: ** www.foo.com:8000
286: ** 18.52.0.18
287: **
288: ** Returns Host object or NULL if error. You may get back an already
289: ** existing host object - you're not guaranteed a new one each time.
290: */
2.15 eric 291: PUBLIC HTHost * HTHost_new (char * host, u_short u_port)
2.1 frystyk 292: {
293: HTList * list = NULL; /* Current list in cache */
294: HTHost * pres = NULL;
2.13 frystyk 295: int hash = 0;
2.1 frystyk 296: if (!host) {
2.2 frystyk 297: if (CORE_TRACE) HTTrace("Host info... Bad argument\n");
2.1 frystyk 298: return NULL;
299: }
300:
301: /* Find a hash for this host */
302: {
303: char *ptr;
304: for (ptr=host; *ptr; ptr++)
2.13 frystyk 305: hash = (int) ((hash * 3 + (*(unsigned char *) ptr)) % HOST_HASH_SIZE);
2.1 frystyk 306: if (!HostTable) {
2.13 frystyk 307: if ((HostTable = (HTList **) HT_CALLOC(HOST_HASH_SIZE,
2.1 frystyk 308: sizeof(HTList *))) == NULL)
309: HT_OUTOFMEM("HTHost_find");
310: }
311: if (!HostTable[hash]) HostTable[hash] = HTList_new();
312: list = HostTable[hash];
313: }
314:
315: /* Search the cache */
316: {
317: HTList * cur = list;
318: while ((pres = (HTHost *) HTList_nextObject(cur))) {
2.15 eric 319: if (!strcmp(pres->hostname, host) && u_port == pres->u_port) {
2.8 frystyk 320: if (HTHost_isIdle(pres) && time(NULL)>pres->ntime+HostTimeout){
2.2 frystyk 321: if (CORE_TRACE)
2.1 frystyk 322: HTTrace("Host info... Collecting host info %p\n",pres);
323: delete_object(list, pres);
324: pres = NULL;
325: }
326: break;
327: }
328: }
329: }
330:
2.8 frystyk 331: /* If not found then create new Host object, else use existing one */
2.1 frystyk 332: if (pres) {
333: if (pres->channel) {
2.32 frystyk 334:
335: /*
336: ** If we have a TTL for this TCP connection then
337: ** check that we haven't passed it.
338: */
339: if (pres->expires > 0) {
340: time_t t = time(NULL);
2.51 frystyk 341: if (HTHost_isIdle(pres) && pres->expires < t) {
2.32 frystyk 342: if (CORE_TRACE)
343: HTTrace("Host info... Persistent channel %p gotten cold\n",
344: pres->channel);
2.48 frystyk 345: HTHost_clearChannel(pres, HT_OK);
2.32 frystyk 346: } else {
2.53 frystyk 347: pres->expires = t + HTPassiveTimeout;
2.32 frystyk 348: if (CORE_TRACE)
349: HTTrace("Host info... REUSING CHANNEL %p\n",pres->channel);
350: }
351: }
2.55 ! frystyk 352: } else {
! 353: if (CORE_TRACE)
! 354: HTTrace("Host info... Found Host %p with no active channel\n", pres);
2.1 frystyk 355: }
356: } else {
357: if ((pres = (HTHost *) HT_CALLOC(1, sizeof(HTHost))) == NULL)
358: HT_OUTOFMEM("HTHost_add");
2.13 frystyk 359: pres->hash = hash;
2.1 frystyk 360: StrAllocCopy(pres->hostname, host);
2.15 eric 361: pres->u_port = u_port;
2.1 frystyk 362: pres->ntime = time(NULL);
2.8 frystyk 363: pres->mode = HT_TP_SINGLE;
2.26 frystyk 364: pres->delay = WriteDelay;
2.18 eric 365: {
2.26 frystyk 366: int i;
367: for (i = 0; i < HTEvent_TYPES; i++)
368: pres->events[i]= HTEvent_new(HostEvent, pres, HT_PRIORITY_MAX, EventTimeout);
2.18 eric 369: }
2.2 frystyk 370: if (CORE_TRACE)
2.24 frystyk 371: HTTrace("Host info... added `%s\' with host %p to list %p\n",
372: host, pres, list);
2.1 frystyk 373: HTList_addObject(list, (void *) pres);
374: }
375: return pres;
2.9 frystyk 376: }
377:
2.15 eric 378: PUBLIC HTHost * HTHost_newWParse (HTRequest * request, char * url, u_short u_port)
2.13 frystyk 379: {
2.32 frystyk 380: char * port;
381: char * fullhost = NULL;
382: char * parsedHost = NULL;
383: SockA * sin;
384: HTHost * me;
385: char * proxy = HTRequest_proxy(request);
2.13 frystyk 386:
2.32 frystyk 387: fullhost = HTParse(proxy ? proxy : url, "", PARSE_HOST);
2.13 frystyk 388:
389: /* If there's an @ then use the stuff after it as a hostname */
2.32 frystyk 390: if (fullhost) {
391: char * at_sign;
392: if ((at_sign = strchr(fullhost, '@')) != NULL)
393: parsedHost = at_sign+1;
394: else
395: parsedHost = fullhost;
396: }
397: if (!parsedHost || !*parsedHost) {
398: HTRequest_addError(request, ERR_FATAL, NO, HTERR_NO_HOST,
2.52 frystyk 399: NULL, 0, "HTHost_newWParse");
2.32 frystyk 400: HT_FREE(fullhost);
401: return NULL;
402: }
2.55 ! frystyk 403:
! 404: /* See if the default port should be overridden */
! 405: if ((port = strchr(parsedHost, ':')) != NULL) {
2.32 frystyk 406: *port++ = '\0';
2.55 ! frystyk 407: if (*port && isdigit((int) *port)) u_port = (u_short) atol(port);
2.32 frystyk 408: }
2.55 ! frystyk 409: if (PROT_TRACE)
! 410: HTTrace("HTHost parse Looking up `%s\' on port %u\n", parsedHost, u_port);
! 411:
2.32 frystyk 412: /* Find information about this host */
413: if ((me = HTHost_new(parsedHost, u_port)) == NULL) {
2.52 frystyk 414: if (PROT_TRACE)HTTrace("HTHost parse Can't get host info\n");
2.32 frystyk 415: me->tcpstate = TCP_ERROR;
416: return NULL;
417: }
418: sin = &me->sock_addr;
419: memset((void *) sin, '\0', sizeof(SockA));
2.13 frystyk 420: #ifdef DECNET
2.32 frystyk 421: sin->sdn_family = AF_DECnet;
422: net->sock_addr.sdn_objnum = port ? (unsigned char)(strtol(port, (char **) 0, 10)) : DNP_OBJ;
2.13 frystyk 423: #else /* Internet */
2.32 frystyk 424: sin->sin_family = AF_INET;
425: sin->sin_port = htons(u_port);
2.13 frystyk 426: #endif
2.32 frystyk 427: HT_FREE(fullhost); /* parsedHost points into fullhost */
428: return me;
2.13 frystyk 429: }
430:
2.9 frystyk 431: /*
432: ** Search the host info cache for a host object. Examples of host names:
433: **
434: ** www.w3.org
435: ** www.foo.com:8000
436: ** 18.52.0.18
437: **
438: ** Returns Host object or NULL if not found.
439: */
440: PUBLIC HTHost * HTHost_find (char * host)
441: {
442: HTList * list = NULL; /* Current list in cache */
443: HTHost * pres = NULL;
444: if (CORE_TRACE)
445: HTTrace("Host info... Looking for `%s\'\n", host ? host : "<null>");
446:
447: /* Find a hash for this host */
448: if (host && HostTable) {
449: int hash = 0;
450: char *ptr;
451: for (ptr=host; *ptr; ptr++)
2.13 frystyk 452: hash = (int) ((hash * 3 + (*(unsigned char *) ptr)) % HOST_HASH_SIZE);
2.9 frystyk 453: if (!HostTable[hash]) return NULL;
454: list = HostTable[hash];
455:
456: /* Search the cache */
457: {
458: HTList * cur = list;
459: while ((pres = (HTHost *) HTList_nextObject(cur))) {
460: if (!strcmp(pres->hostname, host)) {
461: if (time(NULL) > pres->ntime + HostTimeout) {
462: if (CORE_TRACE)
463: HTTrace("Host info... Collecting host %p\n", pres);
464: delete_object(list, pres);
465: pres = NULL;
466: } else {
467: if (CORE_TRACE)
468: HTTrace("Host info... Found `%s\'\n", host);
469: }
470: return pres;
471: }
472: }
473: }
474: }
475: return NULL;
2.1 frystyk 476: }
477:
478: /*
2.8 frystyk 479: ** Get and set the hostname of the remote host
480: */
481: PUBLIC char * HTHost_name (HTHost * host)
482: {
483: return host ? host->hostname : NULL;
484: }
485:
486: /*
2.1 frystyk 487: ** Get and set the type class of the remote host
488: */
489: PUBLIC char * HTHost_class (HTHost * host)
490: {
491: return host ? host->type : NULL;
492: }
493:
494: PUBLIC void HTHost_setClass (HTHost * host, char * s_class)
495: {
496: if (host && s_class) StrAllocCopy(host->type, s_class);
497: }
498:
499: /*
500: ** Get and set the version of the remote host
501: */
502: PUBLIC int HTHost_version (HTHost *host)
503: {
504: return host ? host->version : 0;
505: }
506:
507: PUBLIC void HTHost_setVersion (HTHost * host, int version)
508: {
509: if (host) host->version = version;
510: }
511:
512: /*
2.53 frystyk 513: ** Get and set the passive timeout for persistent entries.
2.1 frystyk 514: */
2.53 frystyk 515: PUBLIC BOOL HTHost_setPersistTimeout (time_t timeout)
2.1 frystyk 516: {
2.53 frystyk 517: if (timeout > 0) {
518: HTPassiveTimeout = timeout;
519: return YES;
520: }
521: return NO;
522: }
523:
524: PUBLIC time_t HTHost_persistTimeout (void)
525: {
526: return HTPassiveTimeout;
527: }
528:
529: /*
530: ** Get and set the active timeout for persistent entries.
531: */
532: PUBLIC BOOL HTHost_setActiveTimeout (ms_t timeout)
533: {
534: if (timeout > 1000) {
535: HTActiveTimeout = timeout;
536: return YES;
537: }
538: return NO;
2.1 frystyk 539: }
540:
2.53 frystyk 541: PUBLIC ms_t HTHost_activeTimeout (void)
2.1 frystyk 542: {
2.53 frystyk 543: return HTActiveTimeout;
2.1 frystyk 544: }
545:
546: /* Persistent Connection Expiration
547: ** --------------------------------
548: ** Should normally not be used. If, then use calendar time.
549: */
550: PUBLIC void HTHost_setPersistExpires (HTHost * host, time_t expires)
551: {
552: if (host) host->expires = expires;
553: }
554:
555: PUBLIC time_t HTHost_persistExpires (HTHost * host)
556: {
557: return host ? host->expires : -1;
558: }
559:
2.22 eric 560: PUBLIC void HTHost_setReqsPerConnection (HTHost * host, int reqs)
561: {
562: if (host) host->reqsPerConnection = reqs;
563: }
564:
565: PUBLIC int HTHost_reqsPerConnection (HTHost * host)
566: {
567: return host ? host->reqsPerConnection : -1;
568: }
569:
570: PUBLIC void HTHost_setReqsMade (HTHost * host, int reqs)
571: {
572: if (host) host->reqsMade = reqs;
573: }
574:
575: PUBLIC int HTHost_reqsMade (HTHost * host)
576: {
577: return host ? host->reqsMade : -1;
578: }
579:
2.1 frystyk 580: /*
2.6 frystyk 581: ** Public methods for this host
582: */
583: PUBLIC HTMethod HTHost_publicMethods (HTHost * me)
584: {
585: return me ? me->methods : METHOD_INVALID;
586: }
587:
588: PUBLIC void HTHost_setPublicMethods (HTHost * me, HTMethod methodset)
589: {
590: if (me) me->methods = methodset;
591: }
592:
593: PUBLIC void HTHost_appendPublicMethods (HTHost * me, HTMethod methodset)
594: {
595: if (me) me->methods |= methodset;
596: }
597:
598: /*
599: ** Get and set the server name of the remote host
600: */
601: PUBLIC char * HTHost_server (HTHost * host)
602: {
603: return host ? host->server : NULL;
604: }
605:
606: PUBLIC BOOL HTHost_setServer (HTHost * host, const char * server)
607: {
608: if (host && server) {
609: StrAllocCopy(host->server, server);
610: return YES;
611: }
612: return NO;
613: }
614:
615: /*
616: ** Get and set the userAgent name of the remote host
617: */
618: PUBLIC char * HTHost_userAgent (HTHost * host)
619: {
620: return host ? host->user_agent : NULL;
621: }
622:
623: PUBLIC BOOL HTHost_setUserAgent (HTHost * host, const char * userAgent)
624: {
625: if (host && userAgent) {
626: StrAllocCopy(host->user_agent, userAgent);
627: return YES;
2.12 frystyk 628: }
629: return NO;
630: }
631:
632: /*
633: ** Get and set acceptable range units
634: */
635: PUBLIC char * HTHost_rangeUnits (HTHost * host)
636: {
637: return host ? host->range_units : NULL;
638: }
639:
640: PUBLIC BOOL HTHost_setRangeUnits (HTHost * host, const char * units)
641: {
642: if (host && units) {
643: StrAllocCopy(host->range_units, units);
644: return YES;
645: }
646: return NO;
647: }
648:
649: /*
650: ** Checks whether a specific range unit is OK. We always say
651: ** YES except if we have a specific statement from the server that
652: ** it doesn't understand byte ranges - that is - it has sent "none"
653: ** in a "Accept-Range" response header
654: */
655: PUBLIC BOOL HTHost_isRangeUnitAcceptable (HTHost * host, const char * unit)
656: {
657: if (host && unit) {
658: #if 0
659: if (host->range_units) {
660: char * start = strcasestr(host->range_units, "none");
661:
662: /*
663: ** Check that "none" is infact a token. It could be part of some
664: ** other valid string, so we'd better check for it.
665: */
666: if (start) {
667:
668:
669: }
670: return NO;
671: }
672: #endif
673: return strcasecomp(unit, "bytes") ? NO : YES;
2.6 frystyk 674: }
675: return NO;
676: }
677:
2.1 frystyk 678: /*
679: ** As soon as we know that this host accepts persistent connections,
680: ** we associated the channel with the host.
681: ** We don't want more than MaxSockets-2 connections to be persistent in
682: ** order to avoid deadlock.
683: */
2.13 frystyk 684: PUBLIC BOOL HTHost_setPersistent (HTHost * host,
685: BOOL persistent,
686: HTTransportMode mode)
2.1 frystyk 687: {
2.13 frystyk 688: if (!host) return NO;
689:
690: if (!persistent) {
691: /*
692: ** We use the HT_IGNORE status code as we don't want to free
693: ** the stream at this point in time. The situation we want to
694: ** avoid is that we free the channel from within the stream pipe.
695: ** This will lead to an infinite look having the stream freing
696: ** itself.
697: */
2.30 frystyk 698: host->persistent = NO;
2.13 frystyk 699: return HTHost_clearChannel(host, HT_IGNORE);
700: }
701:
2.18 eric 702: /*
703: ** Set the host persistent if not already. Also update the mode to
704: ** the new one - it may have changed
705: */
706: HTHost_setMode(host, mode);
707: if (!host->persistent) {
2.13 frystyk 708: SOCKET sockfd = HTChannel_socket(host->channel);
2.8 frystyk 709: if (sockfd != INVSOC && HTNet_availablePersistentSockets() > 0) {
2.13 frystyk 710: host->persistent = YES;
2.53 frystyk 711: host->expires = time(NULL) + HTPassiveTimeout; /* Default timeout */
2.13 frystyk 712: HTChannel_setHost(host->channel, host);
2.8 frystyk 713: HTNet_increasePersistentSocket();
2.2 frystyk 714: if (CORE_TRACE)
2.1 frystyk 715: HTTrace("Host info... added host %p as persistent\n", host);
716: return YES;
717: } else {
2.2 frystyk 718: if (CORE_TRACE)
719: HTTrace("Host info... no room for persistent socket %d\n",
2.7 frystyk 720: sockfd);
2.18 eric 721: return NO;
2.1 frystyk 722: }
2.18 eric 723: } else {
724: if (CORE_TRACE) HTTrace("Host info... %p already persistent\n", host);
725: return YES;
2.1 frystyk 726: }
727: return NO;
728: }
729:
730: /*
2.13 frystyk 731: ** Check whether we have a persistent channel or not
732: */
733: PUBLIC BOOL HTHost_isPersistent (HTHost * host)
734: {
735: return host && host->persistent;
736: }
737:
738: /*
2.1 frystyk 739: ** Find persistent channel associated with this host.
740: */
741: PUBLIC HTChannel * HTHost_channel (HTHost * host)
742: {
743: return host ? host->channel : NULL;
744: }
745:
2.30 frystyk 746:
2.1 frystyk 747: /*
2.30 frystyk 748: ** Check whether we have got a "close" notification, for example in the
749: ** connection header
750: */
751: PUBLIC BOOL HTHost_setCloseNotification (HTHost * host, BOOL mode)
752: {
753: if (host) {
754: host->close_notification = mode;
2.37 frystyk 755: return YES;
2.30 frystyk 756: }
757: return NO;
758: }
759:
760: PUBLIC BOOL HTHost_closeNotification (HTHost * host)
761: {
762: return host && host->close_notification;
763: }
764:
765: /*
2.1 frystyk 766: ** Clear the persistent entry by deleting the channel object. Note that
767: ** the channel object is only deleted if it's not used anymore.
768: */
2.8 frystyk 769: PUBLIC BOOL HTHost_clearChannel (HTHost * host, int status)
2.1 frystyk 770: {
771: if (host && host->channel) {
2.8 frystyk 772: HTChannel_setHost(host->channel, NULL);
2.10 frystyk 773:
2.13 frystyk 774: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
775: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
2.18 eric 776: host->registeredFor = 0;
2.13 frystyk 777:
2.10 frystyk 778: /*
779: ** We don't want to recursively delete ourselves so if we are
780: ** called from within the stream pipe then don't delete the channel
781: ** at this point
782: */
2.8 frystyk 783: HTChannel_delete(host->channel, status);
2.18 eric 784: host->expires = 0;
2.1 frystyk 785: host->channel = NULL;
2.22 eric 786: host->tcpstate = TCP_BEGIN;
787: host->reqsMade = 0;
2.32 frystyk 788: if (HTHost_isPersistent(host)) {
789: HTNet_decreasePersistentSocket();
790: host->persistent = NO;
791: }
792: host->close_notification = NO;
2.45 frystyk 793: host->broken_pipe = NO;
2.32 frystyk 794: host->mode = HT_TP_SINGLE;
795:
2.28 frystyk 796: if (CORE_TRACE) HTTrace("Host info... removed host %p as persistent\n", host);
2.32 frystyk 797:
798: if (!HTList_isEmpty(host->pending)) {
799: if (CORE_TRACE)
2.45 frystyk 800: HTTrace("Host has %d object(s) pending - attempting launch\n", HTList_count(host->pending));
2.32 frystyk 801: HTHost_launchPending(host);
802: }
2.1 frystyk 803: return YES;
804: }
805: return NO;
806: }
807:
2.37 frystyk 808: PUBLIC BOOL HTHost_doRecover (HTHost * host)
809: {
810: return host ? host->do_recover : NO;
811: }
812:
2.1 frystyk 813: /*
2.18 eric 814: ** Move all entries in the pipeline and move the rest to the pending
815: ** queue. They will get launched at a later point in time.
816: */
817: PUBLIC BOOL HTHost_recoverPipe (HTHost * host)
818: {
819: if (host) {
820: int piped = HTList_count(host->pipeline);
821: if (piped > 0) {
822: int cnt;
2.24 frystyk 823: host->recovered++;
2.18 eric 824: if (CORE_TRACE)
2.24 frystyk 825: HTTrace("Host recovered %d times. Moving %d Net objects from pipe line to pending queue\n",
826: host->recovered, piped);
2.18 eric 827:
828: /*
829: ** Unregister this host for all events
830: */
831: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
832: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
833: host->registeredFor = 0;
834:
835: /*
836: ** Set new mode to single until we know what is going on
837: */
838: host->mode = HT_TP_SINGLE;
839:
840: /*
841: ** Move all net objects from the net object to the pending queue.
842: */
843: if (!host->pending) host->pending = HTList_new();
844: for (cnt=0; cnt<piped; cnt++) {
845: HTNet * net = HTList_removeLastObject(host->pipeline);
846: if (CORE_TRACE) HTTrace("Host recover Resetting net object %p\n", net);
847: net->registeredFor = 0;
848: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, HTEvent_RESET);
849: HTList_appendObject(host->pending, net);
850: }
2.37 frystyk 851:
2.18 eric 852: HTChannel_setSemaphore(host->channel, 0);
853: HTHost_clearChannel(host, HT_INTERRUPTED);
2.37 frystyk 854: host->do_recover = NO;
2.18 eric 855: }
2.24 frystyk 856: return YES;
2.18 eric 857: }
858: return NO;
859: }
860:
861: /*
2.51 frystyk 862: ** Terminate a pipeline prematurely, for example because of timeout,
863: ** interruption, etc.
864: */
865: PUBLIC BOOL HTHost_killPipe (HTHost * host)
866: {
867: return killPipeline(host, HTEvent_CLOSE);
868: }
869:
870: /*
2.8 frystyk 871: ** Handle the connection mode. The mode may change mode in the
872: ** middle of a connection.
873: */
874: PUBLIC HTTransportMode HTHost_mode (HTHost * host, BOOL * active)
875: {
876: return host ? host->mode : HT_TP_SINGLE;
877: }
878:
879: /*
880: ** If the new mode is lower than the old mode then adjust the pipeline
881: ** accordingly. That is, if we are going into single mode then move
882: ** all entries in the pipeline and move the rest to the pending
883: ** queue. They will get launched at a later point in time.
884: */
885: PUBLIC BOOL HTHost_setMode (HTHost * host, HTTransportMode mode)
886: {
887: if (host) {
888: /*
889: ** Check the new mode and see if we must adjust the queues.
890: */
891: if (mode == HT_TP_SINGLE && host->mode > mode) {
892: int piped = HTList_count(host->pipeline);
893: if (piped > 0) {
894: int cnt;
895: if (CORE_TRACE)
896: HTTrace("Host info... Moving %d Net objects from pipe line to pending queue\n", piped);
897: if (!host->pending) host->pending = HTList_new();
898: for (cnt=0; cnt<piped; cnt++) {
2.18 eric 899: HTNet * net = HTList_removeLastObject(host->pipeline);
900: if (CORE_TRACE) HTTrace("Host info... Resetting net object %p\n", net);
2.13 frystyk 901: (*net->event.cbf)(HTChannel_socket(host->channel), net->event.param, HTEvent_RESET);
2.8 frystyk 902: HTList_appendObject(host->pending, net);
903: }
2.18 eric 904: HTChannel_setSemaphore(host->channel, 0);
905: HTHost_clearChannel(host, HT_INTERRUPTED);
2.8 frystyk 906: }
2.24 frystyk 907: }
908:
909: /*
910: ** If we know that this host is bad then we don't allow anything than
911: ** single mode. We can't recover connections for the rest of our life
912: */
913: if (mode == HT_TP_PIPELINE && host->recovered > MAX_HOST_RECOVER) {
914: if (PROT_TRACE)
915: HTTrace("Host info... %p is bad for pipelining so we won't do it!!!\n",
916: host);
917: } else {
918: host->mode = mode;
919: if (PROT_TRACE)
920: HTTrace("Host info... New mode is %d for host %p\n", host->mode, host);
921: }
2.8 frystyk 922: }
923: return NO;
924: }
925:
926: /*
927: ** Check whether a host is idle meaning if it is ready for a new
928: ** request which depends on the mode of the host. If the host is
929: ** idle, i.e. ready for use then return YES else NO. If the host supports
930: ** persistent connections then still only return idle if no requests are
931: ** ongoing.
932: */
933: PUBLIC BOOL HTHost_isIdle (HTHost * host)
934: {
2.32 frystyk 935: return (host && HTList_isEmpty(host->pipeline));
2.8 frystyk 936: }
937:
2.13 frystyk 938: PRIVATE BOOL _roomInPipe (HTHost * host)
939: {
940: int count;
2.34 frystyk 941: if (!host ||
942: (host->reqsPerConnection && host->reqsMade >= host->reqsPerConnection) ||
2.45 frystyk 943: HTHost_closeNotification(host) || host->broken_pipe)
2.32 frystyk 944: return NO;
2.13 frystyk 945: count = HTList_count(host->pipeline);
946: switch (host->mode) {
947: case HT_TP_SINGLE:
948: return count <= 0;
949: case HT_TP_PIPELINE:
2.51 frystyk 950: return (host->recovered < MAX_HOST_RECOVER) ?
951: (count < MaxPipelinedRequests) : (count <= 0);
2.13 frystyk 952: case HT_TP_INTERLEAVE:
953: return YES;
954: }
955: return NO;
956: }
957:
2.8 frystyk 958: /*
959: ** Add a net object to the host object. If the host
960: ** is idle then add to active list (pipeline) else add
961: ** it to the pending list
962: ** Return HT_PENDING if we must pend, HT_OK, or HT_ERROR
963: */
964: PUBLIC int HTHost_addNet (HTHost * host, HTNet * net)
965: {
966: if (host && net) {
967: int status = HT_OK;
2.32 frystyk 968: BOOL doit = (host->doit==net);
2.8 frystyk 969:
2.18 eric 970: /*
971: ** If we don't have a socket already then check to see if we can get
972: ** one. Otherwise we put the host object into our pending queue.
2.52 frystyk 973: */
2.18 eric 974: if (!host->channel && HTNet_availableSockets() <= 0) {
2.8 frystyk 975: if (!PendHost) PendHost = HTList_new();
976: HTList_addObject(PendHost, host);
2.52 frystyk 977: if (!host->pending) host->pending = HTList_new();
978: HTList_addObject(host->pending, net);
979: if (CORE_TRACE)
2.55 ! frystyk 980: HTTrace("Host info... Added Net %p (request %p) as pending on pending Host %p, %d requests made, %d requests in pipe, %d pending\n",
! 981: net, net->request, host, host->reqsMade,
! 982: HTList_count(host->pipeline), HTList_count(host->pending));
2.52 frystyk 983: return HT_PENDING;
2.8 frystyk 984: }
985:
2.45 frystyk 986: #if 0
2.18 eric 987: /*
2.45 frystyk 988: ** First check whether the net object is already on either queue.
989: ** Do NOT add extra copies of the HTNet object to
990: ** the pipeline or pending list (if it's already on the list).
991: */
992: if (HTList_indexOf(host->pipeline, net) >= 0) {
993: if (CORE_TRACE)
994: HTTrace("Host info... The Net %p (request %p) is already in pipe,"
995: " %d requests made, %d requests in pipe, %d pending\n",
996: net, net->request, host->reqsMade,
997: HTList_count(host->pipeline),
998: HTList_count(host->pending));
999: HTDebugBreak(__FILE__, __LINE__,
1000: "Net object %p registered multiple times in pipeline\n",
1001: net);
1002: return HT_OK;
1003: }
2.44 frystyk 1004:
2.45 frystyk 1005: if (HTList_indexOf(host->pending, net) >= 0) {
1006: if (CORE_TRACE)
1007: HTTrace("Host info... The Net %p (request %p) already pending,"
1008: " %d requests made, %d requests in pipe, %d pending\n",
1009: net, net->request, host->reqsMade,
1010: HTList_count(host->pipeline),
1011: HTList_count(host->pending));
1012: HTDebugBreak(__FILE__, __LINE__,
1013: "Net object %p registered multiple times in pending queue\n",
1014: net);
1015:
1016: return HT_PENDING;
1017: }
1018: #endif
2.44 frystyk 1019:
1020: /*
2.18 eric 1021: ** Add net object to either active or pending queue.
1022: */
2.44 frystyk 1023: if (_roomInPipe(host) && (HTList_isEmpty(host->pending) || doit)) {
2.32 frystyk 1024: if (doit) host->doit = NULL;
2.8 frystyk 1025: if (!host->pipeline) host->pipeline = HTList_new();
1026: HTList_addObject(host->pipeline, net);
2.32 frystyk 1027: host->reqsMade++;
1028: if (CORE_TRACE)
2.55 ! frystyk 1029: HTTrace("Host info... Added Net %p (request %p) to pipe on Host %p, %d requests made, %d requests in pipe, %d pending\n",
! 1030: net, net->request, host, host->reqsMade,
! 1031: HTList_count(host->pipeline), HTList_count(host->pending));
2.18 eric 1032:
2.13 frystyk 1033: /*
2.30 frystyk 1034: ** If we have been idle then make sure we delete the timer
2.13 frystyk 1035: */
2.30 frystyk 1036: if (host->timer) {
1037: HTTimer_delete(host->timer);
1038: host->timer = NULL;
1039: }
2.40 kahan 1040:
1041: /*JK: New CBF function
1042: ** Call any user-defined callback to say the request will
1043: ** be processed.
1044: */
1045: HTHost_ActivateRequest (net);
2.30 frystyk 1046:
2.8 frystyk 1047: } else {
1048: if (!host->pending) host->pending = HTList_new();
2.44 frystyk 1049: HTList_addObject(host->pending, net);
2.32 frystyk 1050: if (CORE_TRACE)
2.55 ! frystyk 1051: HTTrace("Host info... Added Net %p (request %p) as pending on Host %p, %d requests made, %d requests in pipe, %d pending\n",
! 1052: net, net->request, host, host->reqsMade,
! 1053: HTList_count(host->pipeline), HTList_count(host->pending));
2.8 frystyk 1054: status = HT_PENDING;
1055: }
1056: return status;
1057: }
1058: return HT_ERROR;
1059: }
1060:
2.51 frystyk 1061: PRIVATE BOOL HTHost_free (HTHost * host, int status)
2.13 frystyk 1062: {
2.32 frystyk 1063: if (host->channel) {
2.13 frystyk 1064:
2.32 frystyk 1065: /* Check if we should keep the socket open */
1066: if (HTHost_isPersistent(host)) {
2.48 frystyk 1067: int piped = HTList_count(host->pipeline);
2.37 frystyk 1068: if (HTHost_closeNotification(host)) {
1069: if (CORE_TRACE)
1070: HTTrace("Host Object. got close notifiation on socket %d\n",
1071: HTChannel_socket(host->channel));
1072:
1073: /*
1074: ** If more than a single element (this one) in the pipe
1075: ** then we have to recover gracefully
1076: */
1077: if (piped > 1) {
1078: host->reqsPerConnection = host->reqsMade - piped;
1079: if (CORE_TRACE)
1080: HTTrace("%d requests made, %d in pipe, max %d requests pr connection\n",
1081: host->reqsMade, piped, host->reqsPerConnection);
1082: host->do_recover = YES;
2.38 frystyk 1083: HTChannel_delete(host->channel, status);
1084: } else {
1085: HTChannel_setSemaphore(host->channel, 0);
1086: HTHost_clearChannel(host, status);
2.37 frystyk 1087: }
2.48 frystyk 1088: } else if (piped<=1 && host->reqsMade==host->reqsPerConnection) {
2.37 frystyk 1089: if (CORE_TRACE) HTTrace("Host Object. closing persistent socket %d\n",
1090: HTChannel_socket(host->channel));
2.32 frystyk 1091:
1092: /*
1093: ** By lowering the semaphore we make sure that the channel
1094: ** is gonna be deleted
1095: */
1096: HTChannel_setSemaphore(host->channel, 0);
1097: HTHost_clearChannel(host, status);
1098:
1099: } else {
1100: if (CORE_TRACE) HTTrace("Host Object. keeping persistent socket %d\n", HTChannel_socket(host->channel));
1101: HTChannel_delete(host->channel, status);
1102:
1103: /*
1104: ** If connection is idle then set a timer so that we close the
1105: ** connection if idle too long
1106: */
2.48 frystyk 1107: if (piped<=1 && HTList_isEmpty(host->pending) && !host->timer) {
1108: host->timer = HTTimer_new(NULL, IdleTimeoutEvent,
2.53 frystyk 1109: host, HTActiveTimeout, YES, NO);
2.32 frystyk 1110: if (PROT_TRACE) HTTrace("Host........ Object %p going idle...\n", host);
1111: }
1112: }
1113: return YES;
1114: } else {
2.33 frystyk 1115: if (CORE_TRACE) HTTrace("Host Object. closing socket %d\n", HTChannel_socket(host->channel));
2.47 frystyk 1116: HTChannel_setSemaphore(host->channel, 0);
2.41 frystyk 1117: HTHost_clearChannel(host, status);
2.32 frystyk 1118: }
2.13 frystyk 1119: }
2.32 frystyk 1120: return NO;
2.13 frystyk 1121: }
1122:
2.51 frystyk 1123: PUBLIC BOOL HTHost_deleteNet (HTHost * host, HTNet * net, int status)
2.8 frystyk 1124: {
1125: if (host && net) {
2.44 frystyk 1126: if (CORE_TRACE) HTTrace("Host info... Remove %p from pipe\n", net);
2.51 frystyk 1127:
1128: /* If the Net object is in the pipeline then also update the channel */
1129: if (host->pipeline && HTList_indexOf(host->pipeline, net) >= 0) {
1130: HTHost_free(host, status);
1131: HTList_removeObjectAll(host->pipeline, net);
1132: }
1133:
2.44 frystyk 1134: HTList_removeObjectAll(host->pending, net); /* just to make sure */
2.8 frystyk 1135: return YES;
1136: }
1137: return NO;
1138: }
1139:
1140: /*
1141: ** Handle pending host objects.
1142: ** There are two ways we can end up with pending reqyests:
1143: ** 1) If we are out of sockets then register new host objects as pending.
1144: ** 2) If we are pending on a connection then register new net objects as
1145: ** pending
1146: ** This set of functions handles pending host objects and can start new
1147: ** requests as resources get available
1148: */
1149:
1150: /*
1151: ** Check this host object for any pending requests and return the next
1152: ** registered Net object.
1153: */
1154: PUBLIC HTNet * HTHost_nextPendingNet (HTHost * host)
1155: {
1156: HTNet * net = NULL;
2.32 frystyk 1157: if (host && host->pending) {
2.18 eric 1158: /*JK 23/Sep/96 Bug correction. Associated the following lines to the
1159: **above if. There was a missing pair of brackets.
1160: */
1161: if ((net = (HTNet *) HTList_removeFirstObject(host->pending)) != NULL) {
2.32 frystyk 1162: if (CORE_TRACE)
1163: HTTrace("Host info... Popping %p from pending net queue\n", net);
2.33 frystyk 1164: #if 0
1165: {
1166: HTRequest * request = HTNet_request(net);
1167: char * uri = HTAnchor_address((HTAnchor *) HTRequest_anchor(request));
1168: fprintf(stderr, "Popping '%s'\n", uri);
1169: }
1170: #endif
2.32 frystyk 1171: host->doit = net;
2.18 eric 1172: }
2.8 frystyk 1173: }
1174: return net;
1175: }
1176:
1177: /*
2.13 frystyk 1178: ** Return the current list of pending host objects waiting for a socket
2.8 frystyk 1179: */
1180: PUBLIC HTHost * HTHost_nextPendingHost (void)
1181: {
1182: HTHost * host = NULL;
1183: if (PendHost) {
1184: if ((host = (HTHost *) HTList_removeFirstObject(PendHost)) != NULL)
1185: if (PROT_TRACE)
2.32 frystyk 1186: HTTrace("Host info... Popping %p from pending host queue\n",
2.8 frystyk 1187: host);
1188: }
1189: return host;
1190: }
1191:
1192: /*
1193: ** Start the next pending request if any. First we look for pending
1194: ** requests for the same host and then we check for any other pending
1195: ** hosts
1196: */
1197: PUBLIC BOOL HTHost_launchPending (HTHost * host)
1198: {
2.52 frystyk 1199: HTNet * net = NULL;
2.8 frystyk 1200: if (!host) {
1201: if (PROT_TRACE) HTTrace("Host info... Bad arguments\n");
1202: return NO;
1203: }
1204:
1205: /*
2.52 frystyk 1206: ** In pipeline we can only have one doing writing at a time.
1207: ** We therefore check that there are no other Net object
1208: ** registered for write
2.8 frystyk 1209: */
2.52 frystyk 1210: if (host->mode == HT_TP_PIPELINE) {
1211: net = (HTNet *) HTList_lastObject(host->pipeline);
1212: if (net && net->registeredFor == HTEvent_WRITE)
1213: return NO;
1214: }
2.8 frystyk 1215:
2.52 frystyk 1216: /*
1217: ** Check the current Host object for pending Net objects
1218: */
1219: if (_roomInPipe(host) && DoPendingReqLaunch &&
1220: (net = HTHost_nextPendingNet(host))) {
1221: HTHost_ActivateRequest(net);
1222: if (CORE_TRACE)
1223: HTTrace("Launch pending net object %p with %d reqs in pipe (%d reqs made)\n",
1224: net, HTList_count(host->pipeline), host->reqsMade);
1225: return HTNet_execute(net, HTEvent_WRITE);
1226: }
2.13 frystyk 1227:
2.52 frystyk 1228: /*
1229: ** Check for other pending Host objects
1230: */
1231: if (DoPendingReqLaunch && HTNet_availableSockets() > 0) {
1232: HTHost * pending = HTHost_nextPendingHost();
1233: if (pending && (net = HTHost_nextPendingNet(pending))) {
1234: if (!pending->pipeline) pending->pipeline = HTList_new();
1235: HTList_addObject(pending->pipeline, net);
1236: host->reqsMade++;
1237: if (CORE_TRACE)
1238: HTTrace("Launch pending host object %p, net %p with %d reqs in pipe (%d reqs made)\n",
1239: pending, net, HTList_count(pending->pipeline), pending->reqsMade);
1240: HTHost_ActivateRequest(net);
1241: return HTNet_execute(net, HTEvent_WRITE);
2.8 frystyk 1242: }
2.52 frystyk 1243: }
1244: return YES;
2.13 frystyk 1245: }
1246:
1247: PUBLIC HTNet * HTHost_firstNet (HTHost * host)
1248: {
1249: return (HTNet *) HTList_firstObject(host->pipeline);
1250: }
1251:
1252: /*
1253: ** The host event manager keeps track of the state of it's client engines
1254: ** (typically HTTPEvent), accepting multiple blocks on read or write from
1255: ** multiple pipelined engines. It then registers its own engine
1256: ** (HostEvent) with the event manager.
1257: */
1258: PUBLIC int HTHost_connect (HTHost * host, HTNet * net, char * url, HTProtocolId port)
1259: {
2.42 frystyk 1260: HTRequest * request = HTNet_request(net);
2.52 frystyk 1261: int status = HT_OK;
2.42 frystyk 1262: if (!host) {
1263: HTProtocol * protocol = HTNet_protocol(net);
1264: if ((host = HTHost_newWParse(request, url, HTProtocol_id(protocol))) == NULL)
2.45 frystyk 1265: return HT_ERROR;
2.52 frystyk 1266:
1267: /*
1268: ** If not already locked and without a channel
2.55 ! frystyk 1269: ** then lock the darn thing with the first Net object
! 1270: ** pending.
2.52 frystyk 1271: */
1272: if (!host->lock && !host->channel) {
2.55 ! frystyk 1273: HTNet * next_pending = NULL;
2.42 frystyk 1274: host->forceWriteFlush = YES;
2.55 ! frystyk 1275: host->lock = (next_pending = HTList_firstObject(host->pending)) ?
! 1276: next_pending : net;
! 1277: if (CORE_TRACE) HTTrace("Host connect Grabbing lock on Host %p with %p\n", host, host->lock);
2.42 frystyk 1278: }
1279: HTNet_setHost(net, host);
1280: }
1281:
1282: if (!host->lock || (host->lock && host->lock == net)) {
1283: status = HTDoConnect(net, url, port);
2.55 ! frystyk 1284: if (status == HT_PENDING)
! 1285: return HT_WOULD_BLOCK;
! 1286: else if (status == HT_WOULD_BLOCK) {
2.42 frystyk 1287: host->lock = net;
2.52 frystyk 1288: return status;
2.55 ! frystyk 1289: } else {
! 1290:
! 1291: /*
! 1292: ** See if there is already a new pending request that should
! 1293: ** take over the current lock
! 1294: */
! 1295: HTNet * next_pending = NULL;
! 1296: if ((next_pending = HTList_firstObject(host->pending))) {
! 1297: if (CORE_TRACE) HTTrace("Host connect Changing lock on Host %p to %p\n",
! 1298: host, next_pending);
! 1299: host->lock = next_pending;
! 1300: } else {
! 1301: if (CORE_TRACE) HTTrace("Host connect Unlocking Host %p\n", host);
! 1302: host->lock = NULL;
! 1303: }
! 1304: return status;
2.42 frystyk 1305: }
1306: } else {
2.55 ! frystyk 1307: if (CORE_TRACE)
! 1308: HTTrace("Host connect Host %p already locked with %p\n", host, host->lock);
2.42 frystyk 1309: if ((status = HTHost_addNet(host, net)) == HT_PENDING) {
1310: return HT_PENDING;
1311: }
2.54 frystyk 1312: }
1313: return HT_ERROR; /* @@@ - some more deletion and stuff here? */
1314: }
1315:
1316: PUBLIC int HTHost_accept (HTHost * host, HTNet * net, HTNet ** accepted,
1317: char * url, HTProtocolId port)
1318: {
1319: HTRequest * request = HTNet_request(net);
1320: int status = HT_OK;
1321: if (!host) {
1322: HTProtocol * protocol = HTNet_protocol(net);
1323: if ((host = HTHost_newWParse(request, url, HTProtocol_id(protocol))) == NULL)
1324: return HT_ERROR;
1325: else {
1326: SockA *sin = &host->sock_addr;
1327: sin->sin_addr.s_addr = INADDR_ANY;
1328: }
1329:
1330: /*
1331: ** If not already locked and without a channel
1332: ** then lock the darn thing
1333: */
1334: if (!host->lock && !host->channel) {
1335: host->forceWriteFlush = YES;
1336: host->lock = net;
1337: }
1338: HTNet_setHost(net, host);
1339:
1340: /*
1341: ** Start listening on the socket
1342: */
1343: {
1344: status = HTDoListen(net, port, INVSOC, HT_BACKLOG);
1345: if (status != HT_OK) {
1346: if (CORE_TRACE) HTTrace("Listen...... On Host %p resulted in %d\n", host, status);
1347: return HT_ERROR;
1348: }
1349: }
1350: }
1351:
1352: if (!host->lock || (host->lock && host->lock == net)) {
1353: status = HTDoAccept(net, accepted);
1354: if (status == HT_OK) {
1355:
1356: /* Add the new accepted Net object to the pipeline */
1357: HTList_appendObject(host->pipeline, *accepted);
1358:
1359: /* Unlock the accept object */
1360: host->lock = NULL;
1361:
1362: return HT_OK;
1363: }
1364: if (status == HT_WOULD_BLOCK) {
1365: host->lock = net;
1366: return status;
1367: }
1368: if (status == HT_PENDING) return HT_WOULD_BLOCK;
2.42 frystyk 1369: }
2.13 frystyk 1370: return HT_ERROR; /* @@@ - some more deletion and stuff here? */
1371: }
1372:
1373: /*
1374: ** Rules: SINGLE: one element in pipe, either reading or writing
1375: ** PIPE: n element in pipe, n-1 reading, 1 writing
1376: */
1377: PUBLIC int HTHost_register (HTHost * host, HTNet * net, HTEventType type)
1378: {
2.40 kahan 1379: HTEvent *event;
1380:
2.13 frystyk 1381: if (host && net) {
1382:
2.28 frystyk 1383: if (type == HTEvent_CLOSE) {
2.13 frystyk 1384:
2.28 frystyk 1385: /*
1386: ** Unregister this host for all events
1387: */
1388: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_READ);
1389: HTEvent_unregister(HTChannel_socket(host->channel), HTEvent_WRITE);
1390: host->registeredFor = 0;
2.13 frystyk 1391: return YES;
2.28 frystyk 1392:
1393: } else {
1394:
1395: /* net object may already be registered */
1396: if (HTEvent_BITS(type) & net->registeredFor)
1397: return NO;
1398: net->registeredFor ^= HTEvent_BITS(type);
1399:
1400: /* host object may already be registered */
1401: if (host->registeredFor & HTEvent_BITS(type))
1402: return YES;
1403: host->registeredFor ^= HTEvent_BITS(type);
2.46 frystyk 1404:
1405: #ifdef WWW_WIN_ASYNC
1406: /* Make sure we are registered for CLOSE on windows */
1407: event = *(host->events+HTEvent_INDEX(HTEvent_CLOSE));
1408: HTEvent_register(HTChannel_socket(host->channel), HTEvent_CLOSE, event);
1409: #endif /* WWW_WIN_ASYNC */
1410:
1411: /* JK: register a request in the event structure */
2.40 kahan 1412: event = *(host->events+HTEvent_INDEX(type));
1413: event->request = HTNet_request (net);
2.28 frystyk 1414: return HTEvent_register(HTChannel_socket(host->channel),
2.40 kahan 1415: type, event);
2.28 frystyk 1416: }
2.52 frystyk 1417:
1418: return YES;
2.13 frystyk 1419: }
2.52 frystyk 1420: if ("HTHost req.. Bad arguments\n");
2.13 frystyk 1421: return NO;
1422: }
1423:
1424: PUBLIC int HTHost_unregister (HTHost * host, HTNet * net, HTEventType type)
1425: {
1426: if (host && net) {
1427:
2.28 frystyk 1428: /* net object may not be registered */
2.13 frystyk 1429: if (!(HTEvent_BITS(type) & net->registeredFor))
1430: return NO;
1431: net->registeredFor ^= HTEvent_BITS(type);
1432:
2.28 frystyk 1433: /* host object may not be registered */
2.13 frystyk 1434: if (!(host->registeredFor & HTEvent_BITS(type)))
1435: return YES;
1436: host->registeredFor ^= HTEvent_BITS(type);
1437:
1438: /* stay registered for READ to catch a socket close */
1439: /* WRITE and CONNECT can be unregistered, though */
1440: if ((type == HTEvent_WRITE && isLastInPipe(host, net)) ||
1441: type == HTEvent_CONNECT)
1442: /* if we are blocked downstream, shut down the whole pipe */
1443: HTEvent_unregister(HTChannel_socket(host->channel), type);
1444: return YES;
1445: }
1446: return NO;
1447: }
1448:
1449: /*
1450: ** The reader tells HostEvent that it's stream did not finish the data
1451: */
1452: PUBLIC BOOL HTHost_setRemainingRead (HTHost * host, size_t remaining)
1453: {
1454: if (host == NULL) return NO;
1455: host->remainingRead = remaining;
2.20 frystyk 1456: if (PROT_TRACE) HTTrace("Host........ %d bytes remaining \n", remaining);
2.45 frystyk 1457: if (host->broken_pipe && remaining == 0) {
1458: if (PROT_TRACE) HTTrace("Host........ Emtied out connection\n");
1459: }
2.13 frystyk 1460: return YES;
1461: }
1462:
2.32 frystyk 1463: PUBLIC size_t HTHost_remainingRead (HTHost * host)
1464: {
1465: return host ? host->remainingRead : -1;
1466: }
1467:
2.13 frystyk 1468: PUBLIC SockA * HTHost_getSockAddr (HTHost * host)
1469: {
1470: if (!host) return NULL;
1471: return &host->sock_addr;
1472: }
1473:
1474: PUBLIC BOOL HTHost_setHome (HTHost * host, int home)
1475: {
1476: if (!host) return NO;
1477: host->home = home;
1478: return YES;
1479: }
1480:
1481: PUBLIC int HTHost_home (HTHost * host)
1482: {
1483: if (!host) return 0;
1484: return host->home;
1485: }
1486:
2.27 frystyk 1487: PUBLIC BOOL HTHost_setRetry (HTHost * host, int retry)
1488: {
1489: if (!host) return NO;
1490: host->retry = retry;
1491: return YES;
1492: }
1493:
1494: PUBLIC BOOL HTHost_decreaseRetry (HTHost * host)
1495: {
2.44 frystyk 1496: if (!host) return NO;
1497:
1498: if (host->retry > 0) host->retry--;
1499: return YES;
1500:
2.27 frystyk 1501: }
1502:
1503: PUBLIC int HTHost_retry (HTHost * host)
1504: {
1505: if (!host) return 0;
1506: return host->retry;
1507: }
1508:
2.13 frystyk 1509: #if 0 /* Is a macro right now */
2.21 frystyk 1510: PRIVATE BOOL HTHost_setDNS5 (HTHost * host, HTdns * dns)
2.13 frystyk 1511: {
1512: if (!host) return NO;
1513: host->dns = dns;
1514: return YES;
1515: }
1516: #endif
1517:
1518: PUBLIC BOOL HTHost_setChannel (HTHost * host, HTChannel * channel)
1519: {
1520: if (!host) return NO;
1521: host->channel = channel;
1522: return YES;
1523: }
1524:
1525: PUBLIC HTNet * HTHost_getReadNet(HTHost * host)
1526: {
2.38 frystyk 1527: return host ? (HTNet *) HTList_firstObject(host->pipeline) : NULL;
2.13 frystyk 1528: }
1529:
1530: PUBLIC HTNet * HTHost_getWriteNet(HTHost * host)
1531: {
1532: return host ? (HTNet *) HTList_lastObject(host->pipeline) : NULL;
1533: }
1534:
1535: /*
1536: ** Create the input stream and bind it to the channel
1537: ** Please read the description in the HTIOStream module for the parameters
1538: */
1539: PUBLIC HTInputStream * HTHost_getInput (HTHost * host, HTTransport * tp,
1540: void * param, int mode)
1541: {
1542: if (host && host->channel && tp) {
1543: HTChannel * ch = host->channel;
1544: HTInputStream * input = (*tp->input_new)(host, ch, param, mode);
1545: HTChannel_setInput(ch, input);
1546: return HTChannel_getChannelIStream(ch);
1547: }
2.24 frystyk 1548: if (CORE_TRACE) HTTrace("Host Object. Can't create input stream\n");
2.13 frystyk 1549: return NULL;
1550: }
1551:
1552: PUBLIC HTOutputStream * HTHost_getOutput (HTHost * host, HTTransport * tp,
1553: void * param, int mode)
1554: {
1555: if (host && host->channel && tp) {
1556: HTChannel * ch = host->channel;
1557: HTOutputStream * output = (*tp->output_new)(host, ch, param, mode);
1558: HTChannel_setOutput(ch, output);
1559: return output;
1560: }
2.24 frystyk 1561: if (CORE_TRACE) HTTrace("Host Object. Can't create output stream\n");
2.13 frystyk 1562: return NULL;
1563: }
1564:
1565: PUBLIC HTOutputStream * HTHost_output (HTHost * host, HTNet * net)
1566: {
1567: if (host && host->channel && net) {
1568: HTOutputStream * output = HTChannel_output(host->channel);
1569: return output;
1570: }
1571: return NULL;
1572: }
1573:
1574: PUBLIC int HTHost_read(HTHost * host, HTNet * net)
1575: {
1576: HTInputStream * input = HTChannel_input(host->channel);
1577: if (net != HTHost_getReadNet(host)) {
1578: HTHost_register(host, net, HTEvent_READ);
1579: return HT_WOULD_BLOCK;
1580: }
2.17 frystyk 1581:
1582: /*
1583: ** If there is no input channel then this can either mean that
1584: ** we have lost the channel or an error occurred. We return
1585: ** HT_CLOSED as this is a sign to the caller that we don't
1586: ** have a channel
1587: */
1588: return input ? (*input->isa->read)(input) : HT_CLOSED;
2.13 frystyk 1589: }
1590:
1591: PUBLIC BOOL HTHost_setConsumed(HTHost * host, size_t bytes)
1592: {
1593: HTInputStream * input;
1594: if (!host || !host->channel) return NO;
1595: if ((input = HTChannel_input(host->channel)) == NULL)
1596: return NO;
2.32 frystyk 1597: if (CORE_TRACE)
2.20 frystyk 1598: HTTrace("Host........ passing %d bytes as consumed to %p\n", bytes, input);
2.13 frystyk 1599: return (*input->isa->consumed)(input, bytes);
1600: }
1601:
1602: PUBLIC int HTHost_hash (HTHost * host)
1603: {
1604: return host ? host->hash : -1;
1605: }
1606:
2.26 frystyk 1607: PUBLIC BOOL HTHost_setWriteDelay (HTHost * host, ms_t delay)
2.13 frystyk 1608: {
2.26 frystyk 1609: if (host && delay >= 0) {
1610: host->delay = delay;
1611: return YES;
1612: }
1613: return NO;
1614: }
1615:
1616: PUBLIC ms_t HTHost_writeDelay (HTHost * host)
1617: {
1618: return host ? host->delay : 0;
1619: }
1620:
1621: PUBLIC int HTHost_findWriteDelay (HTHost * host, ms_t lastFlushTime, int buffSize)
1622: {
2.35 frystyk 1623: #if 0
2.15 eric 1624: unsigned short mtu;
2.18 eric 1625: int ret = -1;
2.15 eric 1626: int socket = HTChannel_socket(host->channel);
2.18 eric 1627: #ifndef WWW_MSWINDOWS
2.15 eric 1628: ret = ioctl(socket, 666, (unsigned long)&mtu);
2.18 eric 1629: #endif /* WWW_MSWINDOWS */
2.15 eric 1630: if ((ret == 0 && buffSize >= mtu) || host->forceWriteFlush)
2.13 frystyk 1631: return 0;
2.26 frystyk 1632: return host->delay;
2.35 frystyk 1633: #else
1634: return host->forceWriteFlush ? 0 : host->delay;
1635: #endif
2.13 frystyk 1636: }
1637:
2.26 frystyk 1638: PUBLIC BOOL HTHost_setDefaultWriteDelay (ms_t delay)
1639: {
1640: if (delay >= 0) {
1641: WriteDelay = delay;
1642: if (CORE_TRACE) HTTrace("Host........ Default write delay is %d ms\n", delay);
1643: return YES;
1644: }
1645: return NO;
1646: }
1647:
1648: PUBLIC ms_t HTHost_defaultWriteDelay (void)
1649: {
1650: return WriteDelay;
1651: }
1652:
2.13 frystyk 1653: PUBLIC int HTHost_forceFlush(HTHost * host)
1654: {
2.35 frystyk 1655: HTNet * targetNet = (HTNet *) HTList_lastObject(host->pipeline);
2.13 frystyk 1656: int ret;
2.35 frystyk 1657: if (targetNet == NULL) return HT_ERROR;
2.13 frystyk 1658: if (CORE_TRACE)
2.28 frystyk 1659: HTTrace("Host Event.. FLUSH passed to `%s\'\n",
1660: HTAnchor_physical(HTRequest_anchor(HTNet_request(targetNet))));
2.13 frystyk 1661: host->forceWriteFlush = YES;
1662: ret = (*targetNet->event.cbf)(HTChannel_socket(host->channel), targetNet->event.param, HTEvent_FLUSH);
2.35 frystyk 1663: host->forceWriteFlush = NO;
2.13 frystyk 1664: return ret;
2.39 frystyk 1665: }
1666:
1667: /*
1668: ** Context pointer to be used as a user defined context
1669: */
1670: PUBLIC void HTHost_setContext (HTHost * me, void * context)
1671: {
2.40 kahan 1672: if (me) me->context = context;
2.39 frystyk 1673: }
1674:
1675: PUBLIC void * HTHost_context (HTHost * me)
1676: {
2.40 kahan 1677: return me ? me->context : NULL;
2.1 frystyk 1678: }
2.11 kahan 1679:
2.13 frystyk 1680: PUBLIC int HTHost_eventTimeout (void)
1681: {
1682: return EventTimeout;
1683: }
2.11 kahan 1684:
2.13 frystyk 1685: PUBLIC void HTHost_setEventTimeout (int millis)
1686: {
1687: EventTimeout = millis;
1688: if (CORE_TRACE) HTTrace("Host........ Setting event timeout to %d ms\n", millis);
1689: }
2.40 kahan 1690:
2.45 frystyk 1691: PUBLIC BOOL HTHost_setMaxPipelinedRequests (int max)
1692: {
1693: if (max > 1) {
1694: MaxPipelinedRequests = max;
1695: return YES;
1696: }
1697: return NO;
1698: }
2.40 kahan 1699:
2.45 frystyk 1700: PUBLIC int HTHost_maxPipelinedRequests (void)
2.40 kahan 1701: {
2.45 frystyk 1702: return MaxPipelinedRequests;
1703: }
1704:
1705: PUBLIC void HTHost_setActivateRequestCallback (HTHost_ActivateRequestCallback * cbf)
1706: {
1707: if (CORE_TRACE) HTTrace("HTHost...... Registering %p\n", cbf);
2.40 kahan 1708: ActivateReqCBF = cbf;
1709: }
1710:
2.45 frystyk 1711: PRIVATE int HTHost_ActivateRequest (HTNet * net)
2.40 kahan 1712: {
2.45 frystyk 1713: HTRequest * request = NULL;
1714: if (!ActivateReqCBF) {
1715: if (CORE_TRACE)
1716: HTTrace("HTHost...... No ActivateRequest callback handler registered\n");
1717: return HT_ERROR;
1718: }
1719: request = HTNet_request(net);
1720: return (*ActivateReqCBF)(request);
2.40 kahan 1721: }
1722:
1723: PUBLIC void HTHost_disable_PendingReqLaunch (void)
1724: {
2.45 frystyk 1725: DoPendingReqLaunch = NO;
2.40 kahan 1726: }
1727:
1728: PUBLIC void HTHost_enable_PendingReqLaunch (void)
1729: {
2.45 frystyk 1730: DoPendingReqLaunch = YES;
2.40 kahan 1731: }
1732:
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