1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
3 * The contents of this file are subject to the Mozilla Public
4 * License Version 1.1 (the "License"); you may not use this file
5 * except in compliance with the License. You may obtain a copy of
6 * the License at http://www.mozilla.org/MPL/
8 * Software distributed under the License is distributed on an "AS
9 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
10 * implied. See the License for the specific language governing
11 * rights and limitations under the License.
13 * The Original Code is the Netscape Portable Runtime (NSPR).
15 * The Initial Developer of the Original Code is Netscape
16 * Communications Corporation. Portions created by Netscape are
17 * Copyright (C) 1998-2000 Netscape Communications Corporation. All
22 * Alternatively, the contents of this file may be used under the
23 * terms of the GNU General Public License Version 2 or later (the
24 * "GPL"), in which case the provisions of the GPL are applicable
25 * instead of those above. If you wish to allow use of your
26 * version of this file only under the terms of the GPL and not to
27 * allow others to use your version of this file under the MPL,
28 * indicate your decision by deleting the provisions above and
29 * replace them with the notice and other provisions required by
30 * the GPL. If you do not delete the provisions above, a recipient
31 * may use your version of this file under either the MPL or the
38 * Description: PR i/o related stuff, such as file system access, file
39 * i/o, socket i/o, etc.
53 typedef struct PRDir PRDir;
54 typedef struct PRDirEntry PRDirEntry;
56 typedef struct PRDirUTF16 PRDirUTF16;
57 typedef struct PRDirEntryUTF16 PRDirEntryUTF16;
58 #endif /* MOZ_UNICODE */
59 typedef struct PRFileDesc PRFileDesc;
60 typedef struct PRFileInfo PRFileInfo;
61 typedef struct PRFileInfo64 PRFileInfo64;
62 typedef union PRNetAddr PRNetAddr;
63 typedef struct PRIOMethods PRIOMethods;
64 typedef struct PRPollDesc PRPollDesc;
65 typedef struct PRFilePrivate PRFilePrivate;
66 typedef struct PRSendFileData PRSendFileData;
69 ***************************************************************************
70 ** The file descriptor.
71 ** This is the primary structure to represent any active open socket,
72 ** whether it be a normal file or a network connection. Such objects
73 ** are stackable (or layerable). Each layer may have its own set of
74 ** method pointers and context private to that layer. All each layer
75 ** knows about its neighbors is how to get to their method table.
76 ***************************************************************************
79 typedef PRIntn PRDescIdentity; /* see: Layering file descriptors */
82 const PRIOMethods *methods; /* the I/O methods table */
83 PRFilePrivate *secret; /* layer dependent data */
84 PRFileDesc *lower, *higher; /* pointers to adjacent layers */
85 void (PR_CALLBACK *dtor)(PRFileDesc *fd);
86 /* A destructor function for layer */
87 PRDescIdentity identity; /* Identity of this particular layer */
91 ***************************************************************************
92 ** PRTransmitFileFlags
94 ** Flags for PR_TransmitFile. Pass PR_TRANSMITFILE_CLOSE_SOCKET to
95 ** PR_TransmitFile if the connection should be closed after the file
97 ***************************************************************************
99 typedef enum PRTransmitFileFlags {
100 PR_TRANSMITFILE_KEEP_OPEN = 0, /* socket is left open after file
102 PR_TRANSMITFILE_CLOSE_SOCKET = 1 /* socket is closed after file
104 } PRTransmitFileFlags;
107 **************************************************************************
108 ** Macros for PRNetAddr
110 ** Address families: PR_AF_INET, PR_AF_INET6, PR_AF_LOCAL
111 ** IP addresses: PR_INADDR_ANY, PR_INADDR_LOOPBACK, PR_INADDR_BROADCAST
112 **************************************************************************
118 #define PR_AF_LOCAL 1
119 #define PR_INADDR_ANY (unsigned long)0x00000000
120 #define PR_INADDR_LOOPBACK 0x7f000001
121 #define PR_INADDR_BROADCAST (unsigned long)0xffffffff
125 #define PR_AF_INET AF_INET
126 #define PR_AF_LOCAL AF_UNIX
127 #define PR_INADDR_ANY INADDR_ANY
128 #define PR_INADDR_LOOPBACK INADDR_LOOPBACK
129 #define PR_INADDR_BROADCAST INADDR_BROADCAST
134 ** Define PR_AF_INET6 in prcpucfg.h with the same
135 ** value as AF_INET6 on platforms with IPv6 support.
136 ** Otherwise define it here.
139 #define PR_AF_INET6 100
143 #define PR_AF_UNSPEC 0
147 **************************************************************************
150 ** Only Internet Protocol (IPv4 and IPv6) addresses are supported.
151 ** The address family must always represent IPv4 (AF_INET, probably == 2)
152 ** or IPv6 (AF_INET6).
153 **************************************************************************
154 *************************************************************************/
164 #define pr_s6_addr _S6_un._S6_u8
165 #define pr_s6_addr16 _S6_un._S6_u16
166 #define pr_s6_addr32 _S6_un._S6_u32
167 #define pr_s6_addr64 _S6_un._S6_u64
169 typedef struct PRIPv6Addr PRIPv6Addr;
173 PRUint16 family; /* address family (0x00ff maskable) */
175 char data[10]; /* Be has a smaller structure */
177 char data[14]; /* raw address data */
181 PRUint16 family; /* address family (AF_INET) */
182 PRUint16 port; /* port number */
183 PRUint32 ip; /* The actual 32 bits of address */
185 char pad[4]; /* Be has a smaller structure */
191 PRUint16 family; /* address family (AF_INET6) */
192 PRUint16 port; /* port number */
193 PRUint32 flowinfo; /* routing information */
194 PRIPv6Addr ip; /* the actual 128 bits of address */
195 PRUint32 scope_id; /* set of interfaces for a scope */
197 #if defined(XP_UNIX) || defined(XP_OS2)
198 struct { /* Unix domain socket address */
199 PRUint16 family; /* address family (AF_UNIX) */
201 char path[108]; /* null-terminated pathname */
202 /* bind fails if size is not 108. */
204 char path[104]; /* null-terminated pathname */
211 ***************************************************************************
214 ** The file descriptors can have predefined options set after they file
215 ** descriptor is created to change their behavior. Only the options in
216 ** the following enumeration are supported.
217 ***************************************************************************
219 typedef enum PRSockOption
221 PR_SockOpt_Nonblocking, /* nonblocking io */
222 PR_SockOpt_Linger, /* linger on close if data present */
223 PR_SockOpt_Reuseaddr, /* allow local address reuse */
224 PR_SockOpt_Keepalive, /* keep connections alive */
225 PR_SockOpt_RecvBufferSize, /* send buffer size */
226 PR_SockOpt_SendBufferSize, /* receive buffer size */
228 PR_SockOpt_IpTimeToLive, /* time to live */
229 PR_SockOpt_IpTypeOfService, /* type of service and precedence */
231 PR_SockOpt_AddMember, /* add an IP group membership */
232 PR_SockOpt_DropMember, /* drop an IP group membership */
233 PR_SockOpt_McastInterface, /* multicast interface address */
234 PR_SockOpt_McastTimeToLive, /* multicast timetolive */
235 PR_SockOpt_McastLoopback, /* multicast loopback */
237 PR_SockOpt_NoDelay, /* don't delay send to coalesce packets */
238 PR_SockOpt_MaxSegment, /* maximum segment size */
239 PR_SockOpt_Broadcast, /* enable broadcast */
243 typedef struct PRLinger {
244 PRBool polarity; /* Polarity of the option's setting */
245 PRIntervalTime linger; /* Time to linger before closing */
248 typedef struct PRMcastRequest {
249 PRNetAddr mcaddr; /* IP multicast address of group */
250 PRNetAddr ifaddr; /* local IP address of interface */
253 typedef struct PRSocketOptionData
258 PRUintn ip_ttl; /* IP time to live */
259 PRUintn mcast_ttl; /* IP multicast time to live */
260 PRUintn tos; /* IP type of service and precedence */
261 PRBool non_blocking; /* Non-blocking (network) I/O */
262 PRBool reuse_addr; /* Allow local address reuse */
263 PRBool keep_alive; /* Keep connections alive */
264 PRBool mcast_loopback; /* IP multicast loopback */
265 PRBool no_delay; /* Don't delay send to coalesce packets */
266 PRBool broadcast; /* Enable broadcast */
267 PRSize max_segment; /* Maximum segment size */
268 PRSize recv_buffer_size; /* Receive buffer size */
269 PRSize send_buffer_size; /* Send buffer size */
270 PRLinger linger; /* Time to linger on close if data present */
271 PRMcastRequest add_member; /* add an IP group membership */
272 PRMcastRequest drop_member; /* Drop an IP group membership */
273 PRNetAddr mcast_if; /* multicast interface address */
275 } PRSocketOptionData;
278 ***************************************************************************
281 ** The I/O vector is used by the write vector method to describe the areas
282 ** that are affected by the ouput operation.
283 ***************************************************************************
285 typedef struct PRIOVec {
291 ***************************************************************************
292 ** Discover what type of socket is being described by the file descriptor.
293 ***************************************************************************
295 typedef enum PRDescType
298 PR_DESC_SOCKET_TCP = 2,
299 PR_DESC_SOCKET_UDP = 3,
304 typedef enum PRSeekWhence {
310 NSPR_API(PRDescType) PR_GetDescType(PRFileDesc *file);
313 ***************************************************************************
316 ** The I/O methods table provides procedural access to the functions of
317 ** the file descriptor. It is the responsibility of a layer implementor
318 ** to provide suitable functions at every entry point. If a layer provides
319 ** no functionality, it should call the next lower(higher) function of the
320 ** same name (e.g., return fd->lower->method->close(fd->lower));
322 ** Not all functions are implemented for all types of files. In cases where
323 ** that is true, the function will return a error indication with an error
324 ** code of PR_INVALID_METHOD_ERROR.
325 ***************************************************************************
328 typedef PRStatus (PR_CALLBACK *PRCloseFN)(PRFileDesc *fd);
329 typedef PRInt32 (PR_CALLBACK *PRReadFN)(PRFileDesc *fd, void *buf, PRInt32 amount);
330 typedef PRInt32 (PR_CALLBACK *PRWriteFN)(PRFileDesc *fd, const void *buf, PRInt32 amount);
331 typedef PRInt32 (PR_CALLBACK *PRAvailableFN)(PRFileDesc *fd);
332 typedef PRInt64 (PR_CALLBACK *PRAvailable64FN)(PRFileDesc *fd);
333 typedef PRStatus (PR_CALLBACK *PRFsyncFN)(PRFileDesc *fd);
334 typedef PROffset32 (PR_CALLBACK *PRSeekFN)(PRFileDesc *fd, PROffset32 offset, PRSeekWhence how);
335 typedef PROffset64 (PR_CALLBACK *PRSeek64FN)(PRFileDesc *fd, PROffset64 offset, PRSeekWhence how);
336 typedef PRStatus (PR_CALLBACK *PRFileInfoFN)(PRFileDesc *fd, PRFileInfo *info);
337 typedef PRStatus (PR_CALLBACK *PRFileInfo64FN)(PRFileDesc *fd, PRFileInfo64 *info);
338 typedef PRInt32 (PR_CALLBACK *PRWritevFN)(
339 PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size,
340 PRIntervalTime timeout);
341 typedef PRStatus (PR_CALLBACK *PRConnectFN)(
342 PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout);
343 typedef PRFileDesc* (PR_CALLBACK *PRAcceptFN) (
344 PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout);
345 typedef PRStatus (PR_CALLBACK *PRBindFN)(PRFileDesc *fd, const PRNetAddr *addr);
346 typedef PRStatus (PR_CALLBACK *PRListenFN)(PRFileDesc *fd, PRIntn backlog);
347 typedef PRStatus (PR_CALLBACK *PRShutdownFN)(PRFileDesc *fd, PRIntn how);
348 typedef PRInt32 (PR_CALLBACK *PRRecvFN)(
349 PRFileDesc *fd, void *buf, PRInt32 amount,
350 PRIntn flags, PRIntervalTime timeout);
351 typedef PRInt32 (PR_CALLBACK *PRSendFN) (
352 PRFileDesc *fd, const void *buf, PRInt32 amount,
353 PRIntn flags, PRIntervalTime timeout);
354 typedef PRInt32 (PR_CALLBACK *PRRecvfromFN)(
355 PRFileDesc *fd, void *buf, PRInt32 amount,
356 PRIntn flags, PRNetAddr *addr, PRIntervalTime timeout);
357 typedef PRInt32 (PR_CALLBACK *PRSendtoFN)(
358 PRFileDesc *fd, const void *buf, PRInt32 amount,
359 PRIntn flags, const PRNetAddr *addr, PRIntervalTime timeout);
360 typedef PRInt16 (PR_CALLBACK *PRPollFN)(
361 PRFileDesc *fd, PRInt16 in_flags, PRInt16 *out_flags);
362 typedef PRInt32 (PR_CALLBACK *PRAcceptreadFN)(
363 PRFileDesc *sd, PRFileDesc **nd, PRNetAddr **raddr,
364 void *buf, PRInt32 amount, PRIntervalTime t);
365 typedef PRInt32 (PR_CALLBACK *PRTransmitfileFN)(
366 PRFileDesc *sd, PRFileDesc *fd, const void *headers,
367 PRInt32 hlen, PRTransmitFileFlags flags, PRIntervalTime t);
368 typedef PRStatus (PR_CALLBACK *PRGetsocknameFN)(PRFileDesc *fd, PRNetAddr *addr);
369 typedef PRStatus (PR_CALLBACK *PRGetpeernameFN)(PRFileDesc *fd, PRNetAddr *addr);
370 typedef PRStatus (PR_CALLBACK *PRGetsocketoptionFN)(
371 PRFileDesc *fd, PRSocketOptionData *data);
372 typedef PRStatus (PR_CALLBACK *PRSetsocketoptionFN)(
373 PRFileDesc *fd, const PRSocketOptionData *data);
374 typedef PRInt32 (PR_CALLBACK *PRSendfileFN)(
375 PRFileDesc *networkSocket, PRSendFileData *sendData,
376 PRTransmitFileFlags flags, PRIntervalTime timeout);
377 typedef PRStatus (PR_CALLBACK *PRConnectcontinueFN)(
378 PRFileDesc *fd, PRInt16 out_flags);
379 typedef PRIntn (PR_CALLBACK *PRReservedFN)(PRFileDesc *fd);
382 PRDescType file_type; /* Type of file represented (tos) */
383 PRCloseFN close; /* close file and destroy descriptor */
384 PRReadFN read; /* read up to specified bytes into buffer */
385 PRWriteFN write; /* write specified bytes from buffer */
386 PRAvailableFN available; /* determine number of bytes available */
387 PRAvailable64FN available64; /* ditto, 64 bit */
388 PRFsyncFN fsync; /* flush all buffers to permanent store */
389 PRSeekFN seek; /* position the file to the desired place */
390 PRSeek64FN seek64; /* ditto, 64 bit */
391 PRFileInfoFN fileInfo; /* Get information about an open file */
392 PRFileInfo64FN fileInfo64; /* ditto, 64 bit */
393 PRWritevFN writev; /* Write segments as described by iovector */
394 PRConnectFN connect; /* Connect to the specified (net) address */
395 PRAcceptFN accept; /* Accept a connection for a (net) peer */
396 PRBindFN bind; /* Associate a (net) address with the fd */
397 PRListenFN listen; /* Prepare to listen for (net) connections */
398 PRShutdownFN shutdown; /* Shutdown a (net) connection */
399 PRRecvFN recv; /* Solicit up the the specified bytes */
400 PRSendFN send; /* Send all the bytes specified */
401 PRRecvfromFN recvfrom; /* Solicit (net) bytes and report source */
402 PRSendtoFN sendto; /* Send bytes to (net) address specified */
403 PRPollFN poll; /* Test the fd to see if it is ready */
404 PRAcceptreadFN acceptread; /* Accept and read on a new (net) fd */
405 PRTransmitfileFN transmitfile; /* Transmit at entire file */
406 PRGetsocknameFN getsockname; /* Get (net) address associated with fd */
407 PRGetpeernameFN getpeername; /* Get peer's (net) address */
408 PRReservedFN reserved_fn_6; /* reserved for future use */
409 PRReservedFN reserved_fn_5; /* reserved for future use */
410 PRGetsocketoptionFN getsocketoption;
411 /* Get current setting of specified option */
412 PRSetsocketoptionFN setsocketoption;
413 /* Set value of specified option */
414 PRSendfileFN sendfile; /* Send a (partial) file with header/trailer*/
415 PRConnectcontinueFN connectcontinue;
416 /* Continue a nonblocking connect */
417 PRReservedFN reserved_fn_3; /* reserved for future use */
418 PRReservedFN reserved_fn_2; /* reserved for future use */
419 PRReservedFN reserved_fn_1; /* reserved for future use */
420 PRReservedFN reserved_fn_0; /* reserved for future use */
424 **************************************************************************
425 * FUNCTION: PR_GetSpecialFD
426 * DESCRIPTION: Get the file descriptor that represents the standard input,
427 * output, or error stream.
430 * A value indicating the type of stream desired:
431 * PR_StandardInput: standard input
432 * PR_StandardOuput: standard output
433 * PR_StandardError: standard error
435 * RETURNS: PRFileDesc *
436 * If the argument is valid, PR_GetSpecialFD returns a file descriptor
437 * that represents the corresponding standard I/O stream. Otherwise,
438 * PR_GetSpecialFD returns NULL and sets error PR_INVALID_ARGUMENT_ERROR.
439 **************************************************************************
442 typedef enum PRSpecialFD
444 PR_StandardInput, /* standard input */
445 PR_StandardOutput, /* standard output */
446 PR_StandardError /* standard error */
449 NSPR_API(PRFileDesc*) PR_GetSpecialFD(PRSpecialFD id);
451 #define PR_STDIN PR_GetSpecialFD(PR_StandardInput)
452 #define PR_STDOUT PR_GetSpecialFD(PR_StandardOutput)
453 #define PR_STDERR PR_GetSpecialFD(PR_StandardError)
456 **************************************************************************
457 * Layering file descriptors
459 * File descriptors may be layered. Each layer has it's own identity.
460 * Identities are allocated by the runtime and are to be associated
461 * (by the layer implementor) with all layers that are of that type.
462 * It is then possible to scan the chain of layers and find a layer
463 * that one recongizes and therefore predict that it will implement
464 * a desired protocol.
466 * There are three well-known identities:
467 * PR_INVALID_IO_LAYER => an invalid layer identity, for error return
468 * PR_TOP_IO_LAYER => the identity of the top of the stack
469 * PR_NSPR_IO_LAYER => the identity used by NSPR proper
470 * PR_TOP_IO_LAYER may be used as a shorthand for identifying the topmost
471 * layer of an existing stack. Ie., the following two constructs are
474 * rv = PR_PushIOLayer(stack, PR_TOP_IO_LAYER, my_layer);
475 * rv = PR_PushIOLayer(stack, PR_GetLayersIdentity(stack), my_layer)
477 * A string may be associated with the creation of the identity. It
478 * will be copied by the runtime. If queried the runtime will return
479 * a reference to that copied string (not yet another copy). There
480 * is no facility for deleting an identity.
481 **************************************************************************
484 #define PR_IO_LAYER_HEAD (PRDescIdentity)-3
485 #define PR_INVALID_IO_LAYER (PRDescIdentity)-1
486 #define PR_TOP_IO_LAYER (PRDescIdentity)-2
487 #define PR_NSPR_IO_LAYER (PRDescIdentity)0
489 NSPR_API(PRDescIdentity) PR_GetUniqueIdentity(const char *layer_name);
490 NSPR_API(const char*) PR_GetNameForIdentity(PRDescIdentity ident);
491 NSPR_API(PRDescIdentity) PR_GetLayersIdentity(PRFileDesc* fd);
492 NSPR_API(PRFileDesc*) PR_GetIdentitiesLayer(PRFileDesc* fd_stack, PRDescIdentity id);
495 **************************************************************************
496 * PR_GetDefaultIOMethods: Accessing the default methods table.
497 * You may get a pointer to the default methods table by calling this function.
498 * You may then select any elements from that table with which to build your
499 * layer's methods table. You may NOT modify the table directly.
500 **************************************************************************
502 NSPR_API(const PRIOMethods *) PR_GetDefaultIOMethods(void);
505 **************************************************************************
508 * A new layer may be allocated by calling PR_CreateIOLayerStub(). The
509 * file descriptor returned will contain the pointer to the methods table
510 * provided. The runtime will not modify the table nor test its correctness.
511 **************************************************************************
513 NSPR_API(PRFileDesc*) PR_CreateIOLayerStub(
514 PRDescIdentity ident, const PRIOMethods *methods);
517 **************************************************************************
520 * A new stack may be created by calling PR_CreateIOLayer(). The
521 * file descriptor returned will point to the top of the stack, which has
522 * the layer 'fd' as the topmost layer.
524 * NOTE: This function creates a new style stack, which has a fixed, dummy
525 * header. The old style stack, created by a call to PR_PushIOLayer,
526 * results in modifying contents of the top layer of the stack, when
527 * pushing and popping layers of the stack.
528 **************************************************************************
530 NSPR_API(PRFileDesc*) PR_CreateIOLayer(PRFileDesc* fd);
533 **************************************************************************
536 * A file descriptor (perhaps allocated using PR_CreateIOLayerStub()) may
537 * be pushed into an existing stack of file descriptors at any point the
538 * caller deems appropriate. The new layer will be inserted into the stack
539 * just above the layer with the indicated identity.
541 * Note: Even if the identity parameter indicates the top-most layer of
542 * the stack, the value of the file descriptor describing the original
543 * stack will not change.
544 **************************************************************************
546 NSPR_API(PRStatus) PR_PushIOLayer(
547 PRFileDesc *fd_stack, PRDescIdentity id, PRFileDesc *layer);
550 **************************************************************************
553 * A layer may be popped from a stack by indicating the identity of the
554 * layer to be removed. If found, a pointer to the removed object will
555 * be returned to the caller. The object then becomes the responsibility
558 * Note: Even if the identity indicates the top layer of the stack, the
559 * reference returned will not be the file descriptor for the stack and
560 * that file descriptor will remain valid.
561 **************************************************************************
563 NSPR_API(PRFileDesc*) PR_PopIOLayer(PRFileDesc *fd_stack, PRDescIdentity id);
566 **************************************************************************
568 * DESCRIPTION: Open a file for reading, writing, or both.
571 * The path name of the file to be opened
573 * The file status flags.
574 * It is a bitwise OR of the following bit flags (only one of
575 * the first three flags below may be used):
576 * PR_RDONLY Open for reading only.
577 * PR_WRONLY Open for writing only.
578 * PR_RDWR Open for reading and writing.
579 * PR_CREATE_FILE If the file does not exist, the file is created
580 * If the file exists, this flag has no effect.
581 * PR_SYNC If set, each write will wait for both the file data
582 * and file status to be physically updated.
583 * PR_APPEND The file pointer is set to the end of
584 * the file prior to each write.
585 * PR_TRUNCATE If the file exists, its length is truncated to 0.
586 * PR_EXCL With PR_CREATE_FILE, if the file does not exist,
587 * the file is created. If the file already
588 * exists, no action and NULL is returned
591 * The access permission bits of the file mode, if the file is
592 * created when PR_CREATE_FILE is on.
594 * RETURNS: PRFileDesc *
595 * If the file is successfully opened,
596 * returns a pointer to the PRFileDesc
597 * created for the newly opened file.
598 * Returns a NULL pointer if the open
603 * The return value, if not NULL, points to a dynamically allocated
606 **************************************************************************
610 #define PR_RDONLY 0x01
611 #define PR_WRONLY 0x02
613 #define PR_CREATE_FILE 0x08
614 #define PR_APPEND 0x10
615 #define PR_TRUNCATE 0x20
622 ** CAVEAT: 'mode' is currently only applicable on UNIX platforms.
623 ** The 'mode' argument may be ignored by PR_Open on other platforms.
625 ** 00400 Read by owner.
626 ** 00200 Write by owner.
627 ** 00100 Execute (search if a directory) by owner.
628 ** 00040 Read by group.
629 ** 00020 Write by group.
630 ** 00010 Execute by group.
631 ** 00004 Read by others.
632 ** 00002 Write by others
633 ** 00001 Execute by others.
637 NSPR_API(PRFileDesc*) PR_Open(const char *name, PRIntn flags, PRIntn mode);
640 **************************************************************************
641 * FUNCTION: PR_OpenFile
643 * Open a file for reading, writing, or both.
644 * PR_OpenFile has the same prototype as PR_Open but implements
645 * the specified file mode where possible.
646 **************************************************************************
650 #define PR_IRWXU 00700 /* read, write, execute/search by owner */
651 #define PR_IRUSR 00400 /* read permission, owner */
652 #define PR_IWUSR 00200 /* write permission, owner */
653 #define PR_IXUSR 00100 /* execute/search permission, owner */
654 #define PR_IRWXG 00070 /* read, write, execute/search by group */
655 #define PR_IRGRP 00040 /* read permission, group */
656 #define PR_IWGRP 00020 /* write permission, group */
657 #define PR_IXGRP 00010 /* execute/search permission, group */
658 #define PR_IRWXO 00007 /* read, write, execute/search by others */
659 #define PR_IROTH 00004 /* read permission, others */
660 #define PR_IWOTH 00002 /* write permission, others */
661 #define PR_IXOTH 00001 /* execute/search permission, others */
663 NSPR_API(PRFileDesc*) PR_OpenFile(
664 const char *name, PRIntn flags, PRIntn mode);
668 * EXPERIMENTAL: This function may be removed in a future release.
670 NSPR_API(PRFileDesc*) PR_OpenFileUTF16(
671 const PRUnichar *name, PRIntn flags, PRIntn mode);
672 #endif /* MOZ_UNICODE */
675 **************************************************************************
678 * Close a file or socket.
681 * a pointer to a PRFileDesc.
690 * The dynamic memory pointed to by the argument fd is freed.
691 **************************************************************************
694 NSPR_API(PRStatus) PR_Close(PRFileDesc *fd);
697 **************************************************************************
700 * Read bytes from a file or socket.
701 * The operation will block until either an end of stream indication is
702 * encountered, some positive number of bytes are transferred, or there
703 * is an error. No more than 'amount' bytes will be transferred.
706 * pointer to the PRFileDesc object for the file or socket
708 * pointer to a buffer to hold the data read in.
710 * the size of 'buf' (in bytes)
714 * a positive number indicates the number of bytes actually read in.
715 * 0 means end of file is reached or the network connection is closed.
716 * -1 indicates a failure. The reason for the failure is obtained
717 * by calling PR_GetError().
719 * data is written into the buffer pointed to by 'buf'.
726 **************************************************************************
729 NSPR_API(PRInt32) PR_Read(PRFileDesc *fd, void *buf, PRInt32 amount);
732 ***************************************************************************
735 * Write a specified number of bytes to a file or socket. The thread
736 * invoking this function blocks until all the data is written.
739 * pointer to a PRFileDesc object that refers to a file or socket
741 * pointer to the buffer holding the data
743 * amount of data in bytes to be written from the buffer
747 * A positive number indicates the number of bytes successfully written.
748 * A -1 is an indication that the operation failed. The reason
749 * for the failure is obtained by calling PR_GetError().
750 ***************************************************************************
753 NSPR_API(PRInt32) PR_Write(PRFileDesc *fd,const void *buf,PRInt32 amount);
756 ***************************************************************************
757 * FUNCTION: PR_Writev
759 * Write data to a socket. The data is organized in a PRIOVec array. The
760 * operation will block until all the data is written or the operation
764 * Pointer that points to a PRFileDesc object for a socket.
766 * An array of PRIOVec. PRIOVec is a struct with the following
771 * Number of elements in the iov array. The value of this
772 * argument must not be greater than PR_MAX_IOVECTOR_SIZE.
773 * If it is, the method will fail (PR_BUFFER_OVERFLOW_ERROR).
774 * PRIntervalTime timeout
775 * Time limit for completion of the entire write operation.
779 * A positive number indicates the number of bytes successfully written.
780 * A -1 is an indication that the operation failed. The reason
781 * for the failure is obtained by calling PR_GetError().
782 ***************************************************************************
785 #define PR_MAX_IOVECTOR_SIZE 16 /* 'iov_size' must be <= */
787 NSPR_API(PRInt32) PR_Writev(
788 PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size,
789 PRIntervalTime timeout);
792 ***************************************************************************
793 * FUNCTION: PR_Delete
795 * Delete a file from the filesystem. The operation may fail if the
799 * Path name of the file to be deleted.
803 * The function returns PR_SUCCESS if the file is successfully
804 * deleted, otherwise it returns PR_FAILURE.
805 ***************************************************************************
808 NSPR_API(PRStatus) PR_Delete(const char *name);
810 /**************************************************************************/
812 typedef enum PRFileType
815 PR_FILE_DIRECTORY = 2,
820 PRFileType type; /* Type of file */
821 PROffset32 size; /* Size, in bytes, of file's contents */
822 PRTime creationTime; /* Creation time per definition of PRTime */
823 PRTime modifyTime; /* Last modification time per definition of PRTime */
826 struct PRFileInfo64 {
827 PRFileType type; /* Type of file */
828 PROffset64 size; /* Size, in bytes, of file's contents */
829 PRTime creationTime; /* Creation time per definition of PRTime */
830 PRTime modifyTime; /* Last modification time per definition of PRTime */
833 /****************************************************************************
834 * FUNCTION: PR_GetFileInfo, PR_GetFileInfo64
836 * Get the information about the file with the given path name. This is
837 * applicable only to NSFileDesc describing 'file' types (see
840 * path name of the file
843 * Information about the given file is written into the file
844 * information object pointer to by 'info'.
846 * PR_GetFileInfo returns PR_SUCCESS if file information is successfully
847 * obtained, otherwise it returns PR_FAILURE.
848 ***************************************************************************
851 NSPR_API(PRStatus) PR_GetFileInfo(const char *fn, PRFileInfo *info);
852 NSPR_API(PRStatus) PR_GetFileInfo64(const char *fn, PRFileInfo64 *info);
856 * EXPERIMENTAL: This function may be removed in a future release.
858 NSPR_API(PRStatus) PR_GetFileInfo64UTF16(const PRUnichar *fn, PRFileInfo64 *info);
859 #endif /* MOZ_UNICODE */
862 **************************************************************************
863 * FUNCTION: PR_GetOpenFileInfo, PR_GetOpenFileInfo64
865 * Get information about an open file referred to by the
866 * given PRFileDesc object.
868 * const PRFileDesc *fd
869 * A reference to a valid, open file.
871 * Same as PR_GetFileInfo, PR_GetFileInfo64
873 * PR_GetFileInfo returns PR_SUCCESS if file information is successfully
874 * obtained, otherwise it returns PR_FAILURE.
875 ***************************************************************************
878 NSPR_API(PRStatus) PR_GetOpenFileInfo(PRFileDesc *fd, PRFileInfo *info);
879 NSPR_API(PRStatus) PR_GetOpenFileInfo64(PRFileDesc *fd, PRFileInfo64 *info);
882 **************************************************************************
883 * FUNCTION: PR_Rename
885 * Rename a file from the old name 'from' to the new name 'to'.
888 * The old name of the file to be renamed.
890 * The new name of the file.
894 **************************************************************************
897 NSPR_API(PRStatus) PR_Rename(const char *from, const char *to);
900 *************************************************************************
901 * FUNCTION: PR_Access
903 * Determine accessibility of a file.
906 * path name of the file
908 * specifies which access permission to check for.
909 * It can be one of the following values:
910 * PR_ACCESS_READ_OK Test for read permission
911 * PR_ACCESS_WRITE_OK Test for write permission
912 * PR_ACCESS_EXISTS Check existence of file
916 * PR_SUCCESS is returned if the requested access is permitted.
917 * Otherwise, PR_FAILURE is returned. Additional information
918 * regarding the reason for the failure may be retrieved from
920 *************************************************************************
923 typedef enum PRAccessHow {
924 PR_ACCESS_EXISTS = 1,
925 PR_ACCESS_WRITE_OK = 2,
926 PR_ACCESS_READ_OK = 3
929 NSPR_API(PRStatus) PR_Access(const char *name, PRAccessHow how);
932 *************************************************************************
933 * FUNCTION: PR_Seek, PR_Seek64
935 * Moves read-write file offset
938 * Pointer to a PRFileDesc object.
939 * PROffset32, PROffset64 offset
940 * Specifies a value, in bytes, that is used in conjunction
941 * with the 'whence' parameter to set the file pointer. A
942 * negative value causes seeking in the reverse direction.
943 * PRSeekWhence whence
944 * Specifies how to interpret the 'offset' parameter in setting
945 * the file pointer associated with the 'fd' parameter.
946 * Values for the 'whence' parameter are:
947 * PR_SEEK_SET Sets the file pointer to the value of the
949 * PR_SEEK_CUR Sets the file pointer to its current location
950 * plus the value of the offset parameter.
951 * PR_SEEK_END Sets the file pointer to the size of the
952 * file plus the value of the offset parameter.
955 * RETURN: PROffset32, PROffset64
956 * Upon successful completion, the resulting pointer location,
957 * measured in bytes from the beginning of the file, is returned.
958 * If the PR_Seek() function fails, the file offset remains
959 * unchanged, and the returned value is -1. The error code can
960 * then be retrieved via PR_GetError().
961 *************************************************************************
964 NSPR_API(PROffset32) PR_Seek(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence);
965 NSPR_API(PROffset64) PR_Seek64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence);
968 ************************************************************************
969 * FUNCTION: PR_Available
971 * Determine the amount of data in bytes available for reading
972 * in the given file or socket.
975 * Pointer to a PRFileDesc object that refers to a file or
979 * RETURN: PRInt32, PRInt64
980 * Upon successful completion, PR_Available returns the number of
981 * bytes beyond the current read pointer that is available for
982 * reading. Otherwise, it returns a -1 and the reason for the
983 * failure can be retrieved via PR_GetError().
984 ************************************************************************
987 NSPR_API(PRInt32) PR_Available(PRFileDesc *fd);
988 NSPR_API(PRInt64) PR_Available64(PRFileDesc *fd);
991 ************************************************************************
994 * Sync any buffered data for a fd to its backing device (disk).
997 * Pointer to a PRFileDesc object that refers to a file or
1002 * PR_SUCCESS is returned if the requested access is permitted.
1003 * Otherwise, PR_FAILURE is returned.
1004 ************************************************************************
1007 NSPR_API(PRStatus) PR_Sync(PRFileDesc *fd);
1009 /************************************************************************/
1012 const char *name; /* name of entry, relative to directory name */
1016 struct PRDirEntryUTF16 {
1017 const PRUnichar *name; /* name of entry in UTF16, relative to
1020 #endif /* MOZ_UNICODE */
1022 #if !defined(NO_NSPR_10_SUPPORT)
1023 #define PR_DirName(dirEntry) (dirEntry->name)
1027 *************************************************************************
1028 * FUNCTION: PR_OpenDir
1030 * Open the directory by the given name
1033 * path name of the directory to be opened
1037 * If the directory is sucessfully opened, a PRDir object is
1038 * dynamically allocated and a pointer to it is returned.
1039 * If the directory cannot be opened, a NULL pointer is returned.
1041 * Upon successful completion, the return value points to
1042 * dynamically allocated memory.
1043 *************************************************************************
1046 NSPR_API(PRDir*) PR_OpenDir(const char *name);
1050 * EXPERIMENTAL: This function may be removed in a future release.
1052 NSPR_API(PRDirUTF16*) PR_OpenDirUTF16(const PRUnichar *name);
1053 #endif /* MOZ_UNICODE */
1056 *************************************************************************
1057 * FUNCTION: PR_ReadDir
1061 * pointer to a PRDir object that designates an open directory
1063 * PR_SKIP_NONE Do not skip any files
1064 * PR_SKIP_DOT Skip the directory entry "." that
1065 * represents the current directory
1066 * PR_SKIP_DOT_DOT Skip the directory entry ".." that
1067 * represents the parent directory.
1068 * PR_SKIP_BOTH Skip both '.' and '..'
1069 * PR_SKIP_HIDDEN Skip hidden files
1071 * RETURN: PRDirEntry*
1072 * Returns a pointer to the next entry in the directory. Returns
1073 * a NULL pointer upon reaching the end of the directory or when an
1074 * error occurs. The actual reason can be retrieved via PR_GetError().
1075 *************************************************************************
1078 typedef enum PRDirFlags {
1081 PR_SKIP_DOT_DOT = 0x2,
1083 PR_SKIP_HIDDEN = 0x4
1086 NSPR_API(PRDirEntry*) PR_ReadDir(PRDir *dir, PRDirFlags flags);
1090 * EXPERIMENTAL: This function may be removed in a future release.
1092 NSPR_API(PRDirEntryUTF16*) PR_ReadDirUTF16(PRDirUTF16 *dir, PRDirFlags flags);
1093 #endif /* MOZ_UNICODE */
1096 *************************************************************************
1097 * FUNCTION: PR_CloseDir
1099 * Close the specified directory.
1102 * The directory to be closed.
1106 * If successful, will return a status of PR_SUCCESS. Otherwise
1107 * a value of PR_FAILURE. The reason for the failure may be re-
1108 * trieved using PR_GetError().
1109 *************************************************************************
1112 NSPR_API(PRStatus) PR_CloseDir(PRDir *dir);
1116 * EXPERIMENTAL: This function may be removed in a future release.
1118 NSPR_API(PRStatus) PR_CloseDirUTF16(PRDirUTF16 *dir);
1119 #endif /* MOZ_UNICODE */
1122 *************************************************************************
1123 * FUNCTION: PR_MkDir
1125 * Create a new directory with the given name and access mode.
1128 * The name of the directory to be created. All the path components
1129 * up to but not including the leaf component must already exist.
1131 * See 'mode' definiton in PR_Open().
1135 * If successful, will return a status of PR_SUCCESS. Otherwise
1136 * a value of PR_FAILURE. The reason for the failure may be re-
1137 * trieved using PR_GetError().
1138 *************************************************************************
1141 NSPR_API(PRStatus) PR_MkDir(const char *name, PRIntn mode);
1144 *************************************************************************
1145 * FUNCTION: PR_MakeDir
1147 * Create a new directory with the given name and access mode.
1148 * PR_MakeDir has the same prototype as PR_MkDir but implements
1149 * the specified access mode where possible.
1150 *************************************************************************
1153 NSPR_API(PRStatus) PR_MakeDir(const char *name, PRIntn mode);
1156 *************************************************************************
1157 * FUNCTION: PR_RmDir
1159 * Remove a directory by the given name.
1162 * The name of the directory to be removed. All the path components
1163 * must already exist. Only the leaf component will be removed.
1167 * If successful, will return a status of PR_SUCCESS. Otherwise
1168 * a value of PR_FAILURE. The reason for the failure may be re-
1169 * trieved using PR_GetError().
1170 **************************************************************************
1173 NSPR_API(PRStatus) PR_RmDir(const char *name);
1176 *************************************************************************
1177 * FUNCTION: PR_NewUDPSocket
1179 * Create a new UDP socket.
1184 * RETURN: PRFileDesc*
1185 * Upon successful completion, PR_NewUDPSocket returns a pointer
1186 * to the PRFileDesc created for the newly opened UDP socket.
1187 * Returns a NULL pointer if the creation of a new UDP socket failed.
1189 **************************************************************************
1192 NSPR_API(PRFileDesc*) PR_NewUDPSocket(void);
1195 *************************************************************************
1196 * FUNCTION: PR_NewTCPSocket
1198 * Create a new TCP socket.
1203 * RETURN: PRFileDesc*
1204 * Upon successful completion, PR_NewTCPSocket returns a pointer
1205 * to the PRFileDesc created for the newly opened TCP socket.
1206 * Returns a NULL pointer if the creation of a new TCP socket failed.
1208 **************************************************************************
1211 NSPR_API(PRFileDesc*) PR_NewTCPSocket(void);
1214 *************************************************************************
1215 * FUNCTION: PR_OpenUDPSocket
1217 * Create a new UDP socket of the specified address family.
1223 * RETURN: PRFileDesc*
1224 * Upon successful completion, PR_OpenUDPSocket returns a pointer
1225 * to the PRFileDesc created for the newly opened UDP socket.
1226 * Returns a NULL pointer if the creation of a new UDP socket failed.
1228 **************************************************************************
1231 NSPR_API(PRFileDesc*) PR_OpenUDPSocket(PRIntn af);
1234 *************************************************************************
1235 * FUNCTION: PR_OpenTCPSocket
1237 * Create a new TCP socket of the specified address family.
1243 * RETURN: PRFileDesc*
1244 * Upon successful completion, PR_NewTCPSocket returns a pointer
1245 * to the PRFileDesc created for the newly opened TCP socket.
1246 * Returns a NULL pointer if the creation of a new TCP socket failed.
1248 **************************************************************************
1251 NSPR_API(PRFileDesc*) PR_OpenTCPSocket(PRIntn af);
1254 *************************************************************************
1255 * FUNCTION: PR_Connect
1257 * Initiate a connection on a socket.
1260 * Points to a PRFileDesc object representing a socket
1262 * Specifies the address of the socket in its own communication
1264 * PRIntervalTime timeout
1265 * Time limit for completion of the connect operation.
1269 * Upon successful completion of connection initiation, PR_Connect
1270 * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
1271 * failure information can be obtained by calling PR_GetError().
1272 **************************************************************************
1275 NSPR_API(PRStatus) PR_Connect(
1276 PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout);
1279 *************************************************************************
1280 * FUNCTION: PR_ConnectContinue
1282 * Continue a nonblocking connect. After a nonblocking connect
1283 * is initiated with PR_Connect() (which fails with
1284 * PR_IN_PROGRESS_ERROR), one should call PR_Poll() on the socket,
1285 * with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT. When
1286 * PR_Poll() returns, one calls PR_ConnectContinue() on the
1287 * socket to determine whether the nonblocking connect has
1288 * completed or is still in progress. Repeat the PR_Poll(),
1289 * PR_ConnectContinue() sequence until the nonblocking connect
1293 * the file descriptor representing a socket
1295 * the out_flags field of the poll descriptor returned by
1298 * If the nonblocking connect has successfully completed,
1299 * PR_ConnectContinue returns PR_SUCCESS. If PR_ConnectContinue()
1300 * returns PR_FAILURE, call PR_GetError():
1301 * - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in
1302 * progress and has not completed yet. The caller should poll
1303 * on the file descriptor for the in_flags
1304 * PR_POLL_WRITE|PR_POLL_EXCEPT and retry PR_ConnectContinue
1305 * later when PR_Poll() returns.
1306 * - Other errors: the nonblocking connect has failed with this
1310 NSPR_API(PRStatus) PR_ConnectContinue(PRFileDesc *fd, PRInt16 out_flags);
1313 *************************************************************************
1314 * THIS FUNCTION IS DEPRECATED. USE PR_ConnectContinue INSTEAD.
1316 * FUNCTION: PR_GetConnectStatus
1318 * Get the completion status of a nonblocking connect. After
1319 * a nonblocking connect is initiated with PR_Connect() (which
1320 * fails with PR_IN_PROGRESS_ERROR), one should call PR_Poll()
1321 * on the socket, with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT.
1322 * When PR_Poll() returns, one calls PR_GetConnectStatus on the
1323 * PRPollDesc structure to determine whether the nonblocking
1324 * connect has succeeded or failed.
1326 * const PRPollDesc *pd
1327 * Pointer to a PRPollDesc whose fd member is the socket,
1328 * and in_flags must contain PR_POLL_WRITE and PR_POLL_EXCEPT.
1329 * PR_Poll() should have been called and set the out_flags.
1331 * If the nonblocking connect has successfully completed,
1332 * PR_GetConnectStatus returns PR_SUCCESS. If PR_GetConnectStatus()
1333 * returns PR_FAILURE, call PR_GetError():
1334 * - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in
1335 * progress and has not completed yet.
1336 * - Other errors: the nonblocking connect has failed with this
1340 NSPR_API(PRStatus) PR_GetConnectStatus(const PRPollDesc *pd);
1343 *************************************************************************
1344 * FUNCTION: PR_Accept
1346 * Accept a connection on a socket.
1349 * Points to a PRFileDesc object representing the rendezvous socket
1350 * on which the caller is willing to accept new connections.
1351 * PRIntervalTime timeout
1352 * Time limit for completion of the accept operation.
1355 * Returns the address of the connecting entity in its own
1356 * communication space. It may be NULL.
1357 * RETURN: PRFileDesc*
1358 * Upon successful acceptance of a connection, PR_Accept
1359 * returns a valid file descriptor. Otherwise, it returns NULL.
1360 * Further failure information can be obtained by calling PR_GetError().
1361 **************************************************************************
1364 NSPR_API(PRFileDesc*) PR_Accept(
1365 PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout);
1368 *************************************************************************
1371 * Bind an address to a socket.
1374 * Points to a PRFileDesc object representing a socket.
1376 * Specifies the address to which the socket will be bound.
1380 * Upon successful binding of an address to a socket, PR_Bind
1381 * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
1382 * failure information can be obtained by calling PR_GetError().
1383 **************************************************************************
1386 NSPR_API(PRStatus) PR_Bind(PRFileDesc *fd, const PRNetAddr *addr);
1389 *************************************************************************
1390 * FUNCTION: PR_Listen
1392 * Listen for connections on a socket.
1395 * Points to a PRFileDesc object representing a socket that will be
1396 * used to listen for new connections.
1398 * Specifies the maximum length of the queue of pending connections.
1402 * Upon successful completion of listen request, PR_Listen
1403 * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
1404 * failure information can be obtained by calling PR_GetError().
1405 **************************************************************************
1408 NSPR_API(PRStatus) PR_Listen(PRFileDesc *fd, PRIntn backlog);
1411 *************************************************************************
1412 * FUNCTION: PR_Shutdown
1414 * Shut down part of a full-duplex connection on a socket.
1417 * Points to a PRFileDesc object representing a connected socket.
1419 * Specifies the kind of disallowed operations on the socket.
1420 * PR_SHUTDOWN_RCV - Further receives will be disallowed
1421 * PR_SHUTDOWN_SEND - Further sends will be disallowed
1422 * PR_SHUTDOWN_BOTH - Further sends and receives will be disallowed
1426 * Upon successful completion of shutdown request, PR_Shutdown
1427 * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
1428 * failure information can be obtained by calling PR_GetError().
1429 **************************************************************************
1432 typedef enum PRShutdownHow
1434 PR_SHUTDOWN_RCV = 0, /* disallow further receives */
1435 PR_SHUTDOWN_SEND = 1, /* disallow further sends */
1436 PR_SHUTDOWN_BOTH = 2 /* disallow further receives and sends */
1439 NSPR_API(PRStatus) PR_Shutdown(PRFileDesc *fd, PRShutdownHow how);
1442 *************************************************************************
1445 * Receive a specified number of bytes from a connected socket.
1446 * The operation will block until some positive number of bytes are
1447 * transferred, a time out has occurred, or there is an error.
1448 * No more than 'amount' bytes will be transferred.
1451 * points to a PRFileDesc object representing a socket.
1453 * pointer to a buffer to hold the data received.
1455 * the size of 'buf' (in bytes)
1457 * must be zero or PR_MSG_PEEK.
1458 * PRIntervalTime timeout
1459 * Time limit for completion of the receive operation.
1463 * a positive number indicates the number of bytes actually received.
1464 * 0 means the network connection is closed.
1465 * -1 indicates a failure. The reason for the failure is obtained
1466 * by calling PR_GetError().
1467 **************************************************************************
1470 #define PR_MSG_PEEK 0x2
1472 NSPR_API(PRInt32) PR_Recv(PRFileDesc *fd, void *buf, PRInt32 amount,
1473 PRIntn flags, PRIntervalTime timeout);
1476 *************************************************************************
1479 * Send a specified number of bytes from a connected socket.
1480 * The operation will block until all bytes are
1481 * processed, a time out has occurred, or there is an error.
1484 * points to a PRFileDesc object representing a socket.
1486 * pointer to a buffer from where the data is sent.
1488 * the size of 'buf' (in bytes)
1490 * (OBSOLETE - must always be zero)
1491 * PRIntervalTime timeout
1492 * Time limit for completion of the send operation.
1496 * A positive number indicates the number of bytes successfully processed.
1497 * This number must always equal 'amount'. A -1 is an indication that the
1498 * operation failed. The reason for the failure is obtained by calling
1500 **************************************************************************
1503 NSPR_API(PRInt32) PR_Send(PRFileDesc *fd, const void *buf, PRInt32 amount,
1504 PRIntn flags, PRIntervalTime timeout);
1507 *************************************************************************
1508 * FUNCTION: PR_RecvFrom
1510 * Receive up to a specified number of bytes from socket which may
1511 * or may not be connected.
1512 * The operation will block until one or more bytes are
1513 * transferred, a time out has occurred, or there is an error.
1514 * No more than 'amount' bytes will be transferred.
1517 * points to a PRFileDesc object representing a socket.
1519 * pointer to a buffer to hold the data received.
1521 * the size of 'buf' (in bytes)
1523 * (OBSOLETE - must always be zero)
1525 * Specifies the address of the sending peer. It may be NULL.
1526 * PRIntervalTime timeout
1527 * Time limit for completion of the receive operation.
1531 * a positive number indicates the number of bytes actually received.
1532 * 0 means the network connection is closed.
1533 * -1 indicates a failure. The reason for the failure is obtained
1534 * by calling PR_GetError().
1535 **************************************************************************
1538 NSPR_API(PRInt32) PR_RecvFrom(
1539 PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags,
1540 PRNetAddr *addr, PRIntervalTime timeout);
1543 *************************************************************************
1544 * FUNCTION: PR_SendTo
1546 * Send a specified number of bytes from an unconnected socket.
1547 * The operation will block until all bytes are
1548 * sent, a time out has occurred, or there is an error.
1551 * points to a PRFileDesc object representing an unconnected socket.
1553 * pointer to a buffer from where the data is sent.
1555 * the size of 'buf' (in bytes)
1557 * (OBSOLETE - must always be zero)
1559 * Specifies the address of the peer.
1560 .* PRIntervalTime timeout
1561 * Time limit for completion of the send operation.
1565 * A positive number indicates the number of bytes successfully sent.
1566 * -1 indicates a failure. The reason for the failure is obtained
1567 * by calling PR_GetError().
1568 **************************************************************************
1571 NSPR_API(PRInt32) PR_SendTo(
1572 PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
1573 const PRNetAddr *addr, PRIntervalTime timeout);
1576 *************************************************************************
1577 ** FUNCTION: PR_TransmitFile
1579 ** Transmitfile sends a complete file (sourceFile) across a socket
1580 ** (networkSocket). If headers is non-NULL, the headers will be sent across
1581 ** the socket prior to sending the file.
1583 ** Optionally, the PR_TRANSMITFILE_CLOSE_SOCKET flag may be passed to
1584 ** transmitfile. This flag specifies that transmitfile should close the
1585 ** socket after sending the data.
1588 ** PRFileDesc *networkSocket
1589 ** The socket to send data over
1590 ** PRFileDesc *sourceFile
1592 ** const void *headers
1593 ** A pointer to headers to be sent before sending data
1595 ** length of header buffers in bytes.
1596 ** PRTransmitFileFlags flags
1597 ** If the flags indicate that the connection should be closed,
1598 ** it will be done immediately after transferring the file, unless
1599 ** the operation is unsuccessful.
1600 .* PRIntervalTime timeout
1601 * Time limit for completion of the transmit operation.
1604 ** Returns the number of bytes written or -1 if the operation failed.
1605 ** If an error occurs while sending the file, the PR_TRANSMITFILE_CLOSE_
1606 ** SOCKET flag is ignored. The reason for the failure is obtained
1607 ** by calling PR_GetError().
1608 **************************************************************************
1611 NSPR_API(PRInt32) PR_TransmitFile(
1612 PRFileDesc *networkSocket, PRFileDesc *sourceFile,
1613 const void *headers, PRInt32 hlen, PRTransmitFileFlags flags,
1614 PRIntervalTime timeout);
1617 *************************************************************************
1618 ** FUNCTION: PR_SendFile
1620 ** PR_SendFile sends data from a file (sendData->fd) across a socket
1621 ** (networkSocket). If specified, a header and/or trailer buffer are sent
1622 ** before and after the file, respectively. The file offset, number of bytes
1623 ** of file data to send, the header and trailer buffers are specified in the
1624 ** sendData argument.
1626 ** Optionally, if the PR_TRANSMITFILE_CLOSE_SOCKET flag is passed, the
1627 ** socket is closed after successfully sending the data.
1630 ** PRFileDesc *networkSocket
1631 ** The socket to send data over
1632 ** PRSendFileData *sendData
1633 ** Contains the FD, file offset and length, header and trailer
1634 ** buffer specifications.
1635 ** PRTransmitFileFlags flags
1636 ** If the flags indicate that the connection should be closed,
1637 ** it will be done immediately after transferring the file, unless
1638 ** the operation is unsuccessful.
1639 .* PRIntervalTime timeout
1640 * Time limit for completion of the send operation.
1643 ** Returns the number of bytes written or -1 if the operation failed.
1644 ** If an error occurs while sending the file, the PR_TRANSMITFILE_CLOSE_
1645 ** SOCKET flag is ignored. The reason for the failure is obtained
1646 ** by calling PR_GetError().
1647 **************************************************************************
1650 struct PRSendFileData {
1651 PRFileDesc *fd; /* file to send */
1652 PRUint32 file_offset; /* file offset */
1653 PRSize file_nbytes; /* number of bytes of file data to send */
1654 /* if 0, send data from file_offset to */
1656 const void *header; /* header buffer */
1657 PRInt32 hlen; /* header len */
1658 const void *trailer; /* trailer buffer */
1659 PRInt32 tlen; /* trailer len */
1663 NSPR_API(PRInt32) PR_SendFile(
1664 PRFileDesc *networkSocket, PRSendFileData *sendData,
1665 PRTransmitFileFlags flags, PRIntervalTime timeout);
1668 *************************************************************************
1669 ** FUNCTION: PR_AcceptRead
1671 ** AcceptRead accepts a new connection, returns the newly created
1672 ** socket's descriptor and also returns the connecting peer's address.
1673 ** AcceptRead, as its name suggests, also receives the first block of data
1674 ** sent by the peer.
1677 ** PRFileDesc *listenSock
1678 ** A socket descriptor that has been called with the PR_Listen()
1679 ** function, also known as the rendezvous socket.
1681 ** A pointer to a buffer to receive data sent by the client. This
1682 ** buffer must be large enough to receive <amount> bytes of data
1683 ** and two PRNetAddr structures, plus an extra 32 bytes. See:
1684 ** PR_ACCEPT_READ_BUF_OVERHEAD.
1686 ** The number of bytes of client data to receive. Does not include
1687 ** the size of the PRNetAddr structures. If 0, no data will be read
1689 ** PRIntervalTime timeout
1690 ** The timeout interval only applies to the read portion of the
1691 ** operation. PR_AcceptRead will block indefinitely until the
1692 ** connection is accepted; the read will timeout after the timeout
1693 ** interval elapses.
1695 ** PRFileDesc **acceptedSock
1696 ** The file descriptor for the newly connected socket. This parameter
1697 ** will only be valid if the function return does not indicate failure.
1698 ** PRNetAddr **peerAddr,
1699 ** The address of the remote socket. This parameter will only be
1700 ** valid if the function return does not indicate failure. The
1701 ** returned address is not guaranteed to be properly aligned.
1704 ** The number of bytes read from the client or -1 on failure. The reason
1705 ** for the failure is obtained by calling PR_GetError().
1706 **************************************************************************
1708 /* define buffer overhead constant. Add this value to the user's
1709 ** data length when allocating a buffer to accept data.
1711 ** #define USER_DATA_SIZE 10
1712 ** char buf[USER_DATA_SIZE + PR_ACCEPT_READ_BUF_OVERHEAD];
1713 ** bytesRead = PR_AcceptRead( s, fd, &a, &p, USER_DATA_SIZE, ...);
1715 #define PR_ACCEPT_READ_BUF_OVERHEAD (32+(2*sizeof(PRNetAddr)))
1717 NSPR_API(PRInt32) PR_AcceptRead(
1718 PRFileDesc *listenSock, PRFileDesc **acceptedSock,
1719 PRNetAddr **peerAddr, void *buf, PRInt32 amount, PRIntervalTime timeout);
1722 *************************************************************************
1723 ** FUNCTION: PR_NewTCPSocketPair
1725 ** Create a new TCP socket pair. The returned descriptors can be used
1726 ** interchangeably; they are interconnected full-duplex descriptors: data
1727 ** written to one can be read from the other and vice-versa.
1732 ** PRFileDesc *fds[2]
1733 ** The file descriptor pair for the newly created TCP sockets.
1735 ** Upon successful completion of TCP socket pair, PR_NewTCPSocketPair
1736 ** returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
1737 ** failure information can be obtained by calling PR_GetError().
1738 ** XXX can we implement this on windoze and mac?
1739 **************************************************************************
1741 NSPR_API(PRStatus) PR_NewTCPSocketPair(PRFileDesc *fds[2]);
1744 *************************************************************************
1745 ** FUNCTION: PR_GetSockName
1747 ** Get socket name. Return the network address for this socket.
1751 ** Points to a PRFileDesc object representing the socket.
1754 ** Returns the address of the socket in its own communication space.
1756 ** Upon successful completion, PR_GetSockName returns PR_SUCCESS.
1757 ** Otherwise, it returns PR_FAILURE. Further failure information can
1758 ** be obtained by calling PR_GetError().
1759 **************************************************************************
1761 NSPR_API(PRStatus) PR_GetSockName(PRFileDesc *fd, PRNetAddr *addr);
1764 *************************************************************************
1765 ** FUNCTION: PR_GetPeerName
1767 ** Get name of the connected peer. Return the network address for the
1768 ** connected peer socket.
1772 ** Points to a PRFileDesc object representing the connected peer.
1775 ** Returns the address of the connected peer in its own communication
1778 ** Upon successful completion, PR_GetPeerName returns PR_SUCCESS.
1779 ** Otherwise, it returns PR_FAILURE. Further failure information can
1780 ** be obtained by calling PR_GetError().
1781 **************************************************************************
1783 NSPR_API(PRStatus) PR_GetPeerName(PRFileDesc *fd, PRNetAddr *addr);
1785 NSPR_API(PRStatus) PR_GetSocketOption(
1786 PRFileDesc *fd, PRSocketOptionData *data);
1788 NSPR_API(PRStatus) PR_SetSocketOption(
1789 PRFileDesc *fd, const PRSocketOptionData *data);
1792 *********************************************************************
1794 * File descriptor inheritance
1796 *********************************************************************
1800 ************************************************************************
1801 * FUNCTION: PR_SetFDInheritable
1803 * Set the inheritance attribute of a file descriptor.
1807 * Points to a PRFileDesc object.
1808 * PRBool inheritable
1809 * If PR_TRUE, the file descriptor fd is set to be inheritable
1810 * by a child process. If PR_FALSE, the file descriptor is set
1811 * to be not inheritable by a child process.
1813 * Upon successful completion, PR_SetFDInheritable returns PR_SUCCESS.
1814 * Otherwise, it returns PR_FAILURE. Further failure information can
1815 * be obtained by calling PR_GetError().
1816 *************************************************************************
1818 NSPR_API(PRStatus) PR_SetFDInheritable(
1820 PRBool inheritable);
1823 ************************************************************************
1824 * FUNCTION: PR_GetInheritedFD
1826 * Get an inherited file descriptor with the specified name.
1830 * The name of the inherited file descriptor.
1831 * RETURN: PRFileDesc *
1832 * Upon successful completion, PR_GetInheritedFD returns the
1833 * inherited file descriptor with the specified name. Otherwise,
1834 * it returns NULL. Further failure information can be obtained
1835 * by calling PR_GetError().
1836 *************************************************************************
1838 NSPR_API(PRFileDesc *) PR_GetInheritedFD(const char *name);
1841 *********************************************************************
1843 * Memory-mapped files
1845 *********************************************************************
1848 typedef struct PRFileMap PRFileMap;
1851 * protection options for read and write accesses of a file mapping
1853 typedef enum PRFileMapProtect {
1854 PR_PROT_READONLY, /* read only */
1855 PR_PROT_READWRITE, /* readable, and write is shared */
1856 PR_PROT_WRITECOPY /* readable, and write is private (copy-on-write) */
1859 NSPR_API(PRFileMap *) PR_CreateFileMap(
1862 PRFileMapProtect prot);
1865 * return the alignment (in bytes) of the offset argument to PR_MemMap
1867 NSPR_API(PRInt32) PR_GetMemMapAlignment(void);
1869 NSPR_API(void *) PR_MemMap(
1871 PROffset64 offset, /* must be aligned and sized according to the
1872 * return value of PR_GetMemMapAlignment() */
1875 NSPR_API(PRStatus) PR_MemUnmap(void *addr, PRUint32 len);
1877 NSPR_API(PRStatus) PR_CloseFileMap(PRFileMap *fmap);
1880 ******************************************************************
1882 * Interprocess communication
1884 ******************************************************************
1888 * Creates an anonymous pipe and returns file descriptors for the
1889 * read and write ends of the pipe.
1892 NSPR_API(PRStatus) PR_CreatePipe(
1893 PRFileDesc **readPipe,
1894 PRFileDesc **writePipe
1897 /************************************************************************/
1898 /************** The following definitions are for poll ******************/
1899 /************************************************************************/
1908 ** Bit values for PRPollDesc.in_flags or PRPollDesc.out_flags. Binary-or
1909 ** these together to produce the desired poll request.
1912 #if defined(_PR_POLL_BACKCOMPAT)
1915 #define PR_POLL_READ POLLIN
1916 #define PR_POLL_WRITE POLLOUT
1917 #define PR_POLL_EXCEPT POLLPRI
1918 #define PR_POLL_ERR POLLERR /* only in out_flags */
1919 #define PR_POLL_NVAL POLLNVAL /* only in out_flags when fd is bad */
1920 #define PR_POLL_HUP POLLHUP /* only in out_flags */
1922 #else /* _PR_POLL_BACKCOMPAT */
1924 #define PR_POLL_READ 0x1
1925 #define PR_POLL_WRITE 0x2
1926 #define PR_POLL_EXCEPT 0x4
1927 #define PR_POLL_ERR 0x8 /* only in out_flags */
1928 #define PR_POLL_NVAL 0x10 /* only in out_flags when fd is bad */
1929 #define PR_POLL_HUP 0x20 /* only in out_flags */
1931 #endif /* _PR_POLL_BACKCOMPAT */
1934 *************************************************************************
1935 ** FUNCTION: PR_Poll
1938 ** The call returns as soon as I/O is ready on one or more of the underlying
1939 ** socket objects. A count of the number of ready descriptors is
1940 ** returned unless a timeout occurs in which case zero is returned.
1942 ** PRPollDesc.fd should be set to a pointer to a PRFileDesc object
1943 ** representing a socket. This field can be set to NULL to indicate to
1944 ** PR_Poll that this PRFileDesc object should be ignored.
1945 ** PRPollDesc.in_flags should be set to the desired request
1946 ** (read/write/except or some combination). Upon successful return from
1947 ** this call PRPollDesc.out_flags will be set to indicate what kind of
1948 ** i/o can be performed on the respective descriptor. PR_Poll() uses the
1949 ** out_flags fields as scratch variables during the call. If PR_Poll()
1950 ** returns 0 or -1, the out_flags fields do not contain meaningful values
1951 ** and must not be used.
1954 ** PRPollDesc *pds A pointer to an array of PRPollDesc
1956 ** PRIntn npds The number of elements in the array
1957 ** If this argument is zero PR_Poll is
1958 ** equivalent to a PR_Sleep(timeout).
1960 ** PRIntervalTime timeout Amount of time the call will block waiting
1961 ** for I/O to become ready. If this time expires
1962 ** w/o any I/O becoming ready, the result will
1967 ** PRInt32 Number of PRPollDesc's with events or zero
1968 ** if the function timed out or -1 on failure.
1969 ** The reason for the failure is obtained by
1970 ** calling PR_GetError().
1971 **************************************************************************
1973 NSPR_API(PRInt32) PR_Poll(
1974 PRPollDesc *pds, PRIntn npds, PRIntervalTime timeout);
1977 **************************************************************************
1981 ** A pollable event is a special kind of file descriptor.
1982 ** The only I/O operation you can perform on a pollable event
1983 ** is to poll it with the PR_POLL_READ flag. You can't
1984 ** read from or write to a pollable event.
1986 ** The purpose of a pollable event is to combine event waiting
1987 ** with I/O waiting in a single PR_Poll call. Pollable events
1988 ** are implemented using a pipe or a pair of TCP sockets
1989 ** connected via the loopback address, therefore setting and
1990 ** waiting for pollable events are expensive operating system
1991 ** calls. Do not use pollable events for general thread
1992 ** synchronization. Use condition variables instead.
1994 ** A pollable event has two states: set and unset. Events
1995 ** are not queued, so there is no notion of an event count.
1996 ** A pollable event is either set or unset.
1998 ** A new pollable event is created by a PR_NewPollableEvent
1999 ** call and is initially in the unset state.
2001 ** PR_WaitForPollableEvent blocks the calling thread until
2002 ** the pollable event is set, and then it atomically unsets
2003 ** the pollable event before it returns.
2005 ** To set a pollable event, call PR_SetPollableEvent.
2007 ** One can call PR_Poll with the PR_POLL_READ flag on a pollable
2008 ** event. When the pollable event is set, PR_Poll returns with
2009 ** the PR_POLL_READ flag set in the out_flags.
2011 ** To close a pollable event, call PR_DestroyPollableEvent
2014 **************************************************************************
2017 NSPR_API(PRFileDesc *) PR_NewPollableEvent(void);
2019 NSPR_API(PRStatus) PR_DestroyPollableEvent(PRFileDesc *event);
2021 NSPR_API(PRStatus) PR_SetPollableEvent(PRFileDesc *event);
2023 NSPR_API(PRStatus) PR_WaitForPollableEvent(PRFileDesc *event);
2027 #endif /* prio_h___ */