1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef APR_NETWORK_IO_H
18 #define APR_NETWORK_IO_H
20 * @file apr_network_io.h
21 * @brief APR Network library
25 #include "apr_pools.h"
26 #include "apr_file_io.h"
27 #include "apr_errno.h"
28 #include "apr_inherit.h"
29 #include "apr_perms_set.h"
31 #if APR_HAVE_NETINET_IN_H
32 #include <netinet/in.h>
40 #endif /* __cplusplus */
43 * @defgroup apr_network_io Network Routines
48 #ifndef APR_MAX_SECS_TO_LINGER
49 /** Maximum seconds to linger */
50 #define APR_MAX_SECS_TO_LINGER 30
54 /** Maximum hostname length */
55 #define APRMAXHOSTLEN 256
59 /** Default 'any' address */
60 #define APR_ANYADDR "0.0.0.0"
64 * @defgroup apr_sockopt Socket option definitions
67 #define APR_SO_LINGER 1 /**< Linger */
68 #define APR_SO_KEEPALIVE 2 /**< Keepalive */
69 #define APR_SO_DEBUG 4 /**< Debug */
70 #define APR_SO_NONBLOCK 8 /**< Non-blocking IO */
71 #define APR_SO_REUSEADDR 16 /**< Reuse addresses */
72 #define APR_SO_SNDBUF 64 /**< Send buffer */
73 #define APR_SO_RCVBUF 128 /**< Receive buffer */
74 #define APR_SO_DISCONNECTED 256 /**< Disconnected */
75 #define APR_TCP_NODELAY 512 /**< For SCTP sockets, this is mapped
76 * to STCP_NODELAY internally.
78 #define APR_TCP_NOPUSH 1024 /**< No push */
79 #define APR_RESET_NODELAY 2048 /**< This flag is ONLY set internally
80 * when we set APR_TCP_NOPUSH with
81 * APR_TCP_NODELAY set to tell us that
82 * APR_TCP_NODELAY should be turned on
83 * again when NOPUSH is turned off
85 #define APR_INCOMPLETE_READ 4096 /**< Set on non-blocking sockets
86 * (timeout != 0) on which the
87 * previous read() did not fill a buffer
88 * completely. the next apr_socket_recv()
89 * will first call select()/poll() rather than
90 * going straight into read(). (Can also
91 * be set by an application to force a
92 * select()/poll() call before the next
93 * read, in cases where the app expects
94 * that an immediate read would fail.)
96 #define APR_INCOMPLETE_WRITE 8192 /**< like APR_INCOMPLETE_READ, but for write
97 * @see APR_INCOMPLETE_READ
99 #define APR_IPV6_V6ONLY 16384 /**< Don't accept IPv4 connections on an
100 * IPv6 listening socket.
102 #define APR_TCP_DEFER_ACCEPT 32768 /**< Delay accepting of new connections
103 * until data is available.
104 * @see apr_socket_accept_filter
106 #define APR_SO_BROADCAST 65536 /**< Allow broadcast
108 #define APR_SO_FREEBIND 131072 /**< Allow binding to addresses not owned
114 /** Define what type of socket shutdown should occur. */
116 APR_SHUTDOWN_READ, /**< no longer allow read request */
117 APR_SHUTDOWN_WRITE, /**< no longer allow write requests */
118 APR_SHUTDOWN_READWRITE /**< no longer allow read or write requests */
119 } apr_shutdown_how_e;
121 #define APR_IPV4_ADDR_OK 0x01 /**< @see apr_sockaddr_info_get() */
122 #define APR_IPV6_ADDR_OK 0x02 /**< @see apr_sockaddr_info_get() */
124 #if (!APR_HAVE_IN_ADDR)
126 * We need to make sure we always have an in_addr type, so APR will just
127 * define it ourselves, if the platform doesn't provide it.
130 apr_uint32_t s_addr; /**< storage to hold the IP# */
134 /** @def APR_INADDR_NONE
135 * Not all platforms have a real INADDR_NONE. This macro replaces
136 * INADDR_NONE on all platforms.
139 #define APR_INADDR_NONE INADDR_NONE
141 #define APR_INADDR_NONE ((unsigned int) 0xffffffff)
146 * Not all platforms have these defined, so we'll define them here
147 * The default values come from FreeBSD 4.1.1
149 #define APR_INET AF_INET
151 * Let the system decide which address family to use
154 #define APR_UNSPEC AF_UNSPEC
160 * IPv6 Address Family. Not all platforms may have this defined.
163 #define APR_INET6 AF_INET6
166 #if APR_HAVE_SOCKADDR_UN
167 #if defined (AF_UNIX)
168 #define APR_UNIX AF_UNIX
169 #elif defined(AF_LOCAL)
170 #define APR_UNIX AF_LOCAL
172 #error "Neither AF_UNIX nor AF_LOCAL is defined"
174 #else /* !APR_HAVE_SOCKADDR_UN */
175 #if defined (AF_UNIX)
176 #define APR_UNIX AF_UNIX
177 #elif defined(AF_LOCAL)
178 #define APR_UNIX AF_LOCAL
180 /* TODO: Use a smarter way to detect unique APR_UNIX value */
181 #define APR_UNIX 1234
186 * @defgroup IP_Proto IP Protocol Definitions for use when creating sockets
189 #define APR_PROTO_TCP 6 /**< TCP */
190 #define APR_PROTO_UDP 17 /**< UDP */
191 #define APR_PROTO_SCTP 132 /**< SCTP */
195 * Enum used to denote either the local and remote endpoint of a
199 APR_LOCAL, /**< Socket information for local end of connection */
200 APR_REMOTE /**< Socket information for remote end of connection */
204 * The specific declaration of inet_addr's ... some platforms fall back
205 * inet_network (this is not good, but necessary)
208 #if APR_HAVE_INET_ADDR
209 #define apr_inet_addr inet_addr
210 #elif APR_HAVE_INET_NETWORK /* only DGUX, as far as I know */
213 * not generally safe... inet_network() and inet_addr() perform
214 * different functions */
215 #define apr_inet_addr inet_network
218 /** A structure to represent sockets */
219 typedef struct apr_socket_t apr_socket_t;
221 * A structure to encapsulate headers and trailers for apr_socket_sendfile
223 typedef struct apr_hdtr_t apr_hdtr_t;
224 /** A structure to represent in_addr */
225 typedef struct in_addr apr_in_addr_t;
226 /** A structure to represent an IP subnet */
227 typedef struct apr_ipsubnet_t apr_ipsubnet_t;
229 /** @remark use apr_uint16_t just in case some system has a short that isn't 16 bits... */
230 typedef apr_uint16_t apr_port_t;
232 /** @remark It's defined here as I think it should all be platform safe...
233 * @see apr_sockaddr_t
235 typedef struct apr_sockaddr_t apr_sockaddr_t;
237 * APRs socket address type, used to ensure protocol independence
239 struct apr_sockaddr_t {
240 /** The pool to use... */
244 /** Either a string of the port number or the service name for the port */
246 /** The numeric port */
250 /** How big is the sockaddr we're using? */
252 /** How big is the ip address structure we're using? */
254 /** How big should the address buffer be? 16 for v4 or 46 for v6
255 * used in inet_ntop... */
257 /** This points to the IP address structure within the appropriate
258 * sockaddr structure. */
260 /** If multiple addresses were found by apr_sockaddr_info_get(), this
261 * points to a representation of the next address. */
262 apr_sockaddr_t *next;
263 /** Union of either IPv4 or IPv6 sockaddr. */
265 /** IPv4 sockaddr structure */
266 struct sockaddr_in sin;
268 /** IPv6 sockaddr structure */
269 struct sockaddr_in6 sin6;
271 #if APR_HAVE_SA_STORAGE
272 /** Placeholder to ensure that the size of this union is not
273 * dependent on whether APR_HAVE_IPV6 is defined. */
274 struct sockaddr_storage sas;
276 #if APR_HAVE_SOCKADDR_UN
277 /** Unix domain socket sockaddr structure */
278 struct sockaddr_un unx;
285 * Support reusing the socket on platforms which support it (from disconnect,
286 * specifically Win32.
287 * @remark Optional flag passed into apr_socket_sendfile()
289 #define APR_SENDFILE_DISCONNECT_SOCKET 1
292 /** A structure to encapsulate headers and trailers for apr_socket_sendfile */
294 /** An iovec to store the headers sent before the file. */
295 struct iovec* headers;
296 /** number of headers in the iovec */
298 /** An iovec to store the trailers sent after the file. */
299 struct iovec* trailers;
300 /** number of trailers in the iovec */
304 /* function definitions */
308 * @param new_sock The new socket that has been set up.
309 * @param family The address family of the socket (e.g., APR_INET).
310 * @param type The type of the socket (e.g., SOCK_STREAM).
311 * @param protocol The protocol of the socket (e.g., APR_PROTO_TCP).
312 * @param cont The pool for the apr_socket_t and associated storage.
313 * @note The pool will be used by various functions that operate on the
314 * socket. The caller must ensure that it is not used by other threads
317 APR_DECLARE(apr_status_t) apr_socket_create(apr_socket_t **new_sock,
318 int family, int type,
323 * Shutdown either reading, writing, or both sides of a socket.
324 * @param thesocket The socket to close
325 * @param how How to shutdown the socket. One of:
327 * APR_SHUTDOWN_READ no longer allow read requests
328 * APR_SHUTDOWN_WRITE no longer allow write requests
329 * APR_SHUTDOWN_READWRITE no longer allow read or write requests
331 * @see apr_shutdown_how_e
332 * @remark This does not actually close the socket descriptor, it just
333 * controls which calls are still valid on the socket.
335 APR_DECLARE(apr_status_t) apr_socket_shutdown(apr_socket_t *thesocket,
336 apr_shutdown_how_e how);
340 * @param thesocket The socket to close
342 APR_DECLARE(apr_status_t) apr_socket_close(apr_socket_t *thesocket);
345 * Bind the socket to its associated port
346 * @param sock The socket to bind
347 * @param sa The socket address to bind to
348 * @remark This may be where we will find out if there is any other process
349 * using the selected port.
351 APR_DECLARE(apr_status_t) apr_socket_bind(apr_socket_t *sock,
355 * Listen to a bound socket for connections.
356 * @param sock The socket to listen on
357 * @param backlog The number of outstanding connections allowed in the sockets
358 * listen queue. If this value is less than zero, the listen
359 * queue size is set to zero.
361 APR_DECLARE(apr_status_t) apr_socket_listen(apr_socket_t *sock,
362 apr_int32_t backlog);
365 * Accept a new connection request
366 * @param new_sock A copy of the socket that is connected to the socket that
367 * made the connection request. This is the socket which should
368 * be used for all future communication.
369 * @param sock The socket we are listening on.
370 * @param connection_pool The pool for the new socket.
371 * @note The pool will be used by various functions that operate on the
372 * socket. The caller must ensure that it is not used by other threads
375 APR_DECLARE(apr_status_t) apr_socket_accept(apr_socket_t **new_sock,
377 apr_pool_t *connection_pool);
380 * Issue a connection request to a socket either on the same machine
381 * or a different one.
382 * @param sock The socket we wish to use for our side of the connection
383 * @param sa The address of the machine we wish to connect to.
385 APR_DECLARE(apr_status_t) apr_socket_connect(apr_socket_t *sock,
389 * Determine whether the receive part of the socket has been closed by
390 * the peer (such that a subsequent call to apr_socket_read would
391 * return APR_EOF), if the socket's receive buffer is empty. This
392 * function does not block waiting for I/O.
394 * @param sock The socket to check
395 * @param atreadeof If APR_SUCCESS is returned, *atreadeof is set to
396 * non-zero if a subsequent read would return APR_EOF
397 * @return an error is returned if it was not possible to determine the
398 * status, in which case *atreadeof is not changed.
400 APR_DECLARE(apr_status_t) apr_socket_atreadeof(apr_socket_t *sock,
404 * Create apr_sockaddr_t from hostname, address family, and port.
405 * @param sa The new apr_sockaddr_t.
406 * @param hostname The hostname or numeric address string to resolve/parse, or
407 * NULL to build an address that corresponds to 0.0.0.0 or ::
408 * or in case of APR_UNIX family it is absolute socket filename.
409 * @param family The address family to use, or APR_UNSPEC if the system should
411 * @param port The port number.
412 * @param flags Special processing flags:
414 * APR_IPV4_ADDR_OK first query for IPv4 addresses; only look
415 * for IPv6 addresses if the first query failed;
416 * only valid if family is APR_UNSPEC and hostname
417 * isn't NULL; mutually exclusive with
419 * APR_IPV6_ADDR_OK first query for IPv6 addresses; only look
420 * for IPv4 addresses if the first query failed;
421 * only valid if family is APR_UNSPEC and hostname
422 * isn't NULL and APR_HAVE_IPV6; mutually exclusive
423 * with APR_IPV4_ADDR_OK
425 * @param p The pool for the apr_sockaddr_t and associated storage.
427 APR_DECLARE(apr_status_t) apr_sockaddr_info_get(apr_sockaddr_t **sa,
428 const char *hostname,
435 * Copy apr_sockaddr_t src to dst on pool p.
436 * @param dst The destination apr_sockaddr_t.
437 * @param src The source apr_sockaddr_t.
438 * @param p The pool for the apr_sockaddr_t and associated storage.
440 APR_DECLARE(apr_status_t) apr_sockaddr_info_copy(apr_sockaddr_t **dst,
441 const apr_sockaddr_t *src,
444 /* Set the zone of an IPv6 link-local address object.
445 * @param sa Socket address object
446 * @param zone_id Zone ID (textual "eth0" or numeric "3").
447 * @return Returns APR_EBADIP for non-IPv6 socket or an IPv6 address
448 * which isn't link-local.
450 APR_DECLARE(apr_status_t) apr_sockaddr_zone_set(apr_sockaddr_t *sa,
451 const char *zone_id);
454 /* Retrieve the zone of an IPv6 link-local address object.
455 * @param sa Socket address object
456 * @param name If non-NULL, set to the textual representation of the zone id
457 * @param id If non-NULL, set to the integer zone id
458 * @param p Pool from which *name is allocated if used.
459 * @return Returns APR_EBADIP for non-IPv6 socket or socket without any zone id
460 * set, or other error if the interface could not be mapped to a name.
461 * @remark Both name and id may be NULL, neither are modified if
462 * non-NULL in error cases.
464 APR_DECLARE(apr_status_t) apr_sockaddr_zone_get(const apr_sockaddr_t *sa,
470 * Look up the host name from an apr_sockaddr_t.
471 * @param hostname The hostname.
472 * @param sa The apr_sockaddr_t.
473 * @param flags Special processing flags.
474 * @remark Results can vary significantly between platforms
475 * when processing wildcard socket addresses.
477 APR_DECLARE(apr_status_t) apr_getnameinfo(char **hostname,
482 * Parse hostname/IP address with scope id and port.
484 * Any of the following strings are accepted:
485 * 8080 (just the port number)
486 * www.apache.org (just the hostname)
487 * www.apache.org:8080 (hostname and port number)
488 * [fe80::1]:80 (IPv6 numeric address string only)
489 * [fe80::1%eth0] (IPv6 numeric address string and scope id)
493 * [abc] (not valid IPv6 numeric address string)
494 * abc:65536 (invalid port number)
496 * @param addr The new buffer containing just the hostname. On output, *addr
497 * will be NULL if no hostname/IP address was specfied.
498 * @param scope_id The new buffer containing just the scope id. On output,
499 * *scope_id will be NULL if no scope id was specified.
500 * @param port The port number. On output, *port will be 0 if no port was
502 * ### FIXME: 0 is a legal port (per RFC 1700). this should
503 * ### return something besides zero if the port is missing.
504 * @param str The input string to be parsed.
505 * @param p The pool from which *addr and *scope_id are allocated.
506 * @remark If scope id shouldn't be allowed, check for scope_id != NULL in
507 * addition to checking the return code. If addr/hostname should be
508 * required, check for addr == NULL in addition to checking the
511 APR_DECLARE(apr_status_t) apr_parse_addr_port(char **addr,
518 * Get name of the current machine
519 * @param buf A buffer to store the hostname in.
520 * @param len The maximum length of the hostname that can be stored in the
521 * buffer provided. The suggested length is APRMAXHOSTLEN + 1.
522 * @param cont The pool to use.
523 * @remark If the buffer was not large enough, an error will be returned.
525 APR_DECLARE(apr_status_t) apr_gethostname(char *buf, int len, apr_pool_t *cont);
528 * Return the data associated with the current socket
529 * @param data The user data associated with the socket.
530 * @param key The key to associate with the user data.
531 * @param sock The currently open socket.
533 APR_DECLARE(apr_status_t) apr_socket_data_get(void **data, const char *key,
537 * Set the data associated with the current socket.
538 * @param sock The currently open socket.
539 * @param data The user data to associate with the socket.
540 * @param key The key to associate with the data.
541 * @param cleanup The cleanup to call when the socket is destroyed.
543 APR_DECLARE(apr_status_t) apr_socket_data_set(apr_socket_t *sock, void *data,
545 apr_status_t (*cleanup)(void*));
548 * Send data over a network.
549 * @param sock The socket to send the data over.
550 * @param buf The buffer which contains the data to be sent.
551 * @param len On entry, the number of bytes to send; on exit, the number
555 * This functions acts like a blocking write by default. To change
556 * this behavior, use apr_socket_timeout_set() or the APR_SO_NONBLOCK
559 * It is possible for both bytes to be sent and an error to be returned.
561 * APR_EINTR is never returned.
564 APR_DECLARE(apr_status_t) apr_socket_send(apr_socket_t *sock, const char *buf,
568 * Send multiple buffers over a network.
569 * @param sock The socket to send the data over.
570 * @param vec The array of iovec structs containing the data to send
571 * @param nvec The number of iovec structs in the array
572 * @param len Receives the number of bytes actually written
575 * This functions acts like a blocking write by default. To change
576 * this behavior, use apr_socket_timeout_set() or the APR_SO_NONBLOCK
578 * The number of bytes actually sent is stored in argument 4.
580 * It is possible for both bytes to be sent and an error to be returned.
582 * APR_EINTR is never returned.
585 APR_DECLARE(apr_status_t) apr_socket_sendv(apr_socket_t *sock,
586 const struct iovec *vec,
587 apr_int32_t nvec, apr_size_t *len);
590 * @param sock The socket to send from
591 * @param where The apr_sockaddr_t describing where to send the data
592 * @param flags The flags to use
593 * @param buf The data to send
594 * @param len The length of the data to send
596 APR_DECLARE(apr_status_t) apr_socket_sendto(apr_socket_t *sock,
597 apr_sockaddr_t *where,
598 apr_int32_t flags, const char *buf,
602 * Read data from a socket. On success, the address of the peer from
603 * which the data was sent is copied into the @a from parameter, and the
604 * @a len parameter is updated to give the number of bytes written to
607 * @param from Updated with the address from which the data was received
608 * @param sock The socket to use
609 * @param flags The flags to use
610 * @param buf The buffer to use
611 * @param len The length of the available buffer
614 APR_DECLARE(apr_status_t) apr_socket_recvfrom(apr_sockaddr_t *from,
616 apr_int32_t flags, char *buf,
619 #if APR_HAS_SENDFILE || defined(DOXYGEN)
622 * Send a file from an open file descriptor to a socket, along with
623 * optional headers and trailers
624 * @param sock The socket to which we're writing
625 * @param file The open file from which to read
626 * @param hdtr A structure containing the headers and trailers to send
627 * @param offset Offset into the file where we should begin writing
628 * @param len (input) - Number of bytes to send from the file
629 * (output) - Number of bytes actually sent,
630 * including headers, file, and trailers
631 * @param flags APR flags that are mapped to OS specific flags
632 * @remark This functions acts like a blocking write by default. To change
633 * this behavior, use apr_socket_timeout_set() or the
634 * APR_SO_NONBLOCK socket option.
635 * The number of bytes actually sent is stored in the len parameter.
636 * The offset parameter is passed by reference for no reason; its
637 * value will never be modified by the apr_socket_sendfile() function.
639 APR_DECLARE(apr_status_t) apr_socket_sendfile(apr_socket_t *sock,
646 #endif /* APR_HAS_SENDFILE */
649 * Read data from a network.
650 * @param sock The socket to read the data from.
651 * @param buf The buffer to store the data in.
652 * @param len On entry, the number of bytes to receive; on exit, the number
656 * This functions acts like a blocking read by default. To change
657 * this behavior, use apr_socket_timeout_set() or the APR_SO_NONBLOCK
659 * The number of bytes actually received is stored in argument 3.
661 * It is possible for both bytes to be received and an APR_EOF or
662 * other error to be returned.
664 * APR_EINTR is never returned.
667 APR_DECLARE(apr_status_t) apr_socket_recv(apr_socket_t *sock,
668 char *buf, apr_size_t *len);
671 * Setup socket options for the specified socket
672 * @param sock The socket to set up.
673 * @param opt The option we would like to configure. One of:
675 * APR_SO_DEBUG -- turn on debugging information
676 * APR_SO_KEEPALIVE -- keep connections active
677 * APR_SO_LINGER -- lingers on close if data is present
678 * APR_SO_NONBLOCK -- Turns blocking on/off for socket
679 * When this option is enabled, use
680 * the APR_STATUS_IS_EAGAIN() macro to
681 * see if a send or receive function
682 * could not transfer data without
684 * APR_SO_REUSEADDR -- The rules used in validating addresses
685 * supplied to bind should allow reuse
686 * of local addresses.
687 * APR_SO_SNDBUF -- Set the SendBufferSize
688 * APR_SO_RCVBUF -- Set the ReceiveBufferSize
689 * APR_SO_FREEBIND -- Allow binding to non-local IP address.
691 * @param on Value for the option.
693 APR_DECLARE(apr_status_t) apr_socket_opt_set(apr_socket_t *sock,
694 apr_int32_t opt, apr_int32_t on);
697 * Setup socket timeout for the specified socket
698 * @param sock The socket to set up.
699 * @param t Value for the timeout.
701 * t > 0 -- read and write calls return APR_TIMEUP if specified time
702 * elapsess with no data read or written
703 * t == 0 -- read and write calls never block
704 * t < 0 -- read and write calls block
707 APR_DECLARE(apr_status_t) apr_socket_timeout_set(apr_socket_t *sock,
708 apr_interval_time_t t);
711 * Query socket options for the specified socket
712 * @param sock The socket to query
713 * @param opt The option we would like to query. One of:
715 * APR_SO_DEBUG -- turn on debugging information
716 * APR_SO_KEEPALIVE -- keep connections active
717 * APR_SO_LINGER -- lingers on close if data is present
718 * APR_SO_NONBLOCK -- Turns blocking on/off for socket
719 * APR_SO_REUSEADDR -- The rules used in validating addresses
720 * supplied to bind should allow reuse
721 * of local addresses.
722 * APR_SO_SNDBUF -- Set the SendBufferSize
723 * APR_SO_RCVBUF -- Set the ReceiveBufferSize
724 * APR_SO_DISCONNECTED -- Query the disconnected state of the socket.
725 * (Currently only used on Windows)
727 * @param on Socket option returned on the call.
729 APR_DECLARE(apr_status_t) apr_socket_opt_get(apr_socket_t *sock,
730 apr_int32_t opt, apr_int32_t *on);
733 * Query socket timeout for the specified socket
734 * @param sock The socket to query
735 * @param t Socket timeout returned from the query.
737 APR_DECLARE(apr_status_t) apr_socket_timeout_get(apr_socket_t *sock,
738 apr_interval_time_t *t);
741 * Query the specified socket if at the OOB/Urgent data mark
742 * @param sock The socket to query
743 * @param atmark Is set to true if socket is at the OOB/urgent mark,
744 * otherwise is set to false.
746 APR_DECLARE(apr_status_t) apr_socket_atmark(apr_socket_t *sock,
750 * Return an address associated with a socket; either the address to
751 * which the socket is bound locally or the address of the peer
752 * to which the socket is connected.
753 * @param sa The returned apr_sockaddr_t.
754 * @param which Whether to retrieve the local or remote address
755 * @param sock The socket to use
757 APR_DECLARE(apr_status_t) apr_socket_addr_get(apr_sockaddr_t **sa,
758 apr_interface_e which,
762 * Return the IP address (in numeric address string format) in
763 * an APR socket address. APR will allocate storage for the IP address
764 * string from the pool of the apr_sockaddr_t.
765 * @param addr The IP address.
766 * @param sockaddr The socket address to reference.
768 APR_DECLARE(apr_status_t) apr_sockaddr_ip_get(char **addr,
769 apr_sockaddr_t *sockaddr);
772 * Write the IP address (in numeric address string format) of the APR
773 * socket address @a sockaddr into the buffer @a buf (of size @a buflen).
774 * @param sockaddr The socket address to reference.
776 APR_DECLARE(apr_status_t) apr_sockaddr_ip_getbuf(char *buf, apr_size_t buflen,
777 apr_sockaddr_t *sockaddr);
780 * See if the IP addresses in two APR socket addresses are
781 * equivalent. Appropriate logic is present for comparing
782 * IPv4-mapped IPv6 addresses with IPv4 addresses.
784 * @param addr1 One of the APR socket addresses.
785 * @param addr2 The other APR socket address.
786 * @remark The return value will be non-zero if the addresses
789 APR_DECLARE(int) apr_sockaddr_equal(const apr_sockaddr_t *addr1,
790 const apr_sockaddr_t *addr2);
793 * See if the IP address in an APR socket address refers to the wildcard
794 * address for the protocol family (e.g., INADDR_ANY for IPv4).
796 * @param addr The APR socket address to examine.
797 * @remark The return value will be non-zero if the address is
798 * initialized and is the wildcard address.
800 APR_DECLARE(int) apr_sockaddr_is_wildcard(const apr_sockaddr_t *addr);
803 * Return the type of the socket.
804 * @param sock The socket to query.
805 * @param type The returned type (e.g., SOCK_STREAM).
807 APR_DECLARE(apr_status_t) apr_socket_type_get(apr_socket_t *sock,
811 * Given an apr_sockaddr_t and a service name, set the port for the service
812 * @param sockaddr The apr_sockaddr_t that will have its port set
813 * @param servname The name of the service you wish to use
815 APR_DECLARE(apr_status_t) apr_getservbyname(apr_sockaddr_t *sockaddr,
816 const char *servname);
818 * Build an ip-subnet representation from an IP address and optional netmask or
820 * @param ipsub The new ip-subnet representation
821 * @param ipstr The input IP address string
822 * @param mask_or_numbits The input netmask or number-of-bits string, or NULL
823 * @param p The pool to allocate from
825 APR_DECLARE(apr_status_t) apr_ipsubnet_create(apr_ipsubnet_t **ipsub,
827 const char *mask_or_numbits,
831 * Test the IP address in an apr_sockaddr_t against a pre-built ip-subnet
833 * @param ipsub The ip-subnet representation
834 * @param sa The socket address to test
835 * @return non-zero if the socket address is within the subnet, 0 otherwise
837 APR_DECLARE(int) apr_ipsubnet_test(apr_ipsubnet_t *ipsub, apr_sockaddr_t *sa);
839 #if APR_HAS_SO_ACCEPTFILTER || defined(DOXYGEN)
841 * Set an OS level accept filter.
842 * @param sock The socket to put the accept filter on.
843 * @param name The accept filter
844 * @param args Any extra args to the accept filter. Passing NULL here removes
846 * @bug name and args should have been declared as const char *, as they are in
849 apr_status_t apr_socket_accept_filter(apr_socket_t *sock, char *name,
854 * Return the protocol of the socket.
855 * @param sock The socket to query.
856 * @param protocol The returned protocol (e.g., APR_PROTO_TCP).
858 APR_DECLARE(apr_status_t) apr_socket_protocol_get(apr_socket_t *sock,
862 * Get the pool used by the socket.
864 APR_POOL_DECLARE_ACCESSOR(socket);
867 * Set a socket to be inherited by child processes.
869 APR_DECLARE_INHERIT_SET(socket);
872 * Unset a socket from being inherited by child processes.
874 APR_DECLARE_INHERIT_UNSET(socket);
877 * Set socket permissions.
879 APR_PERMS_SET_IMPLEMENT(socket);
882 * @defgroup apr_mcast IP Multicast
887 * Join a Multicast Group
888 * @param sock The socket to join a multicast group
889 * @param join The address of the multicast group to join
890 * @param iface Address of the interface to use. If NULL is passed, the
891 * default multicast interface will be used. (OS Dependent)
892 * @param source Source Address to accept transmissions from (non-NULL
893 * implies Source-Specific Multicast)
895 APR_DECLARE(apr_status_t) apr_mcast_join(apr_socket_t *sock,
896 apr_sockaddr_t *join,
897 apr_sockaddr_t *iface,
898 apr_sockaddr_t *source);
901 * Leave a Multicast Group. All arguments must be the same as
903 * @param sock The socket to leave a multicast group
904 * @param addr The address of the multicast group to leave
905 * @param iface Address of the interface to use. If NULL is passed, the
906 * default multicast interface will be used. (OS Dependent)
907 * @param source Source Address to accept transmissions from (non-NULL
908 * implies Source-Specific Multicast)
910 APR_DECLARE(apr_status_t) apr_mcast_leave(apr_socket_t *sock,
911 apr_sockaddr_t *addr,
912 apr_sockaddr_t *iface,
913 apr_sockaddr_t *source);
916 * Set the Multicast Time to Live (ttl) for a multicast transmission.
917 * @param sock The socket to set the multicast ttl
918 * @param ttl Time to live to Assign. 0-255, default=1
919 * @remark If the TTL is 0, packets will only be seen by sockets on
920 * the local machine, and only when multicast loopback is enabled.
922 APR_DECLARE(apr_status_t) apr_mcast_hops(apr_socket_t *sock,
926 * Toggle IP Multicast Loopback
927 * @param sock The socket to set multicast loopback
928 * @param opt 0=disable, 1=enable
930 APR_DECLARE(apr_status_t) apr_mcast_loopback(apr_socket_t *sock,
935 * Set the Interface to be used for outgoing Multicast Transmissions.
936 * @param sock The socket to set the multicast interface on
937 * @param iface Address of the interface to use for Multicast
939 APR_DECLARE(apr_status_t) apr_mcast_interface(apr_socket_t *sock,
940 apr_sockaddr_t *iface);
950 #endif /* ! APR_NETWORK_IO_H */