#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup apr_network_io Network Routines
* @ingroup APR
* @{
*/
#ifndef APR_MAX_SECS_TO_LINGER
/** Maximum seconds to linger */
#define APR_MAX_SECS_TO_LINGER 30
#endif
#ifndef APRMAXHOSTLEN
/** Maximum hostname length */
#define APRMAXHOSTLEN 256
#endif
#ifndef APR_ANYADDR
/** Default 'any' address */
#define APR_ANYADDR "0.0.0.0"
#endif
/**
* @defgroup apr_sockopt Socket option definitions
* @{
*/
#define APR_SO_LINGER 1 /**< Linger */
#define APR_SO_KEEPALIVE 2 /**< Keepalive */
#define APR_SO_DEBUG 4 /**< Debug */
#define APR_SO_NONBLOCK 8 /**< Non-blocking IO */
#define APR_SO_REUSEADDR 16 /**< Reuse addresses */
#define APR_SO_SNDBUF 64 /**< Send buffer */
#define APR_SO_RCVBUF 128 /**< Receive buffer */
#define APR_SO_DISCONNECTED 256 /**< Disconnected */
#define APR_TCP_NODELAY 512 /**< For SCTP sockets, this is mapped
* to STCP_NODELAY internally.
*/
#define APR_TCP_NOPUSH 1024 /**< No push */
#define APR_RESET_NODELAY 2048 /**< This flag is ONLY set internally
* when we set APR_TCP_NOPUSH with
* APR_TCP_NODELAY set to tell us that
* APR_TCP_NODELAY should be turned on
* again when NOPUSH is turned off
*/
#define APR_INCOMPLETE_READ 4096 /**< Set on non-blocking sockets
* (timeout != 0) on which the
* previous read() did not fill a buffer
* completely. the next apr_socket_recv()
* will first call select()/poll() rather than
* going straight into read(). (Can also
* be set by an application to force a
* select()/poll() call before the next
* read, in cases where the app expects
* that an immediate read would fail.)
*/
#define APR_INCOMPLETE_WRITE 8192 /**< like APR_INCOMPLETE_READ, but for write
* @see APR_INCOMPLETE_READ
*/
#define APR_IPV6_V6ONLY 16384 /**< Don't accept IPv4 connections on an
* IPv6 listening socket.
*/
#define APR_TCP_DEFER_ACCEPT 32768 /**< Delay accepting of new connections
* until data is available.
* @see apr_socket_accept_filter
*/
/** @} */
/** Define what type of socket shutdown should occur. */
typedef enum {
APR_SHUTDOWN_READ, /**< no longer allow read request */
APR_SHUTDOWN_WRITE, /**< no longer allow write requests */
APR_SHUTDOWN_READWRITE /**< no longer allow read or write requests */
} apr_shutdown_how_e;
#define APR_IPV4_ADDR_OK 0x01 /**< @see apr_sockaddr_info_get() */
#define APR_IPV6_ADDR_OK 0x02 /**< @see apr_sockaddr_info_get() */
#if (!APR_HAVE_IN_ADDR)
/**
* We need to make sure we always have an in_addr type, so APR will just
* define it ourselves, if the platform doesn't provide it.
*/
struct in_addr {
apr_uint32_t s_addr; /**< storage to hold the IP# */
};
#endif
/** @def APR_INADDR_NONE
* Not all platforms have a real INADDR_NONE. This macro replaces
* INADDR_NONE on all platforms.
*/
#ifdef INADDR_NONE
#define APR_INADDR_NONE INADDR_NONE
#else
#define APR_INADDR_NONE ((unsigned int) 0xffffffff)
#endif
/**
* @def APR_INET
* Not all platforms have these defined, so we'll define them here
* The default values come from FreeBSD 4.1.1
*/
#define APR_INET AF_INET
/** @def APR_UNSPEC
* Let the system decide which address family to use
*/
#ifdef AF_UNSPEC
#define APR_UNSPEC AF_UNSPEC
#else
#define APR_UNSPEC 0
#endif
#if APR_HAVE_IPV6
/** @def APR_INET6
* IPv6 Address Family. Not all platforms may have this defined.
*/
#define APR_INET6 AF_INET6
#endif
/**
* @defgroup IP_Proto IP Protocol Definitions for use when creating sockets
* @{
*/
#define APR_PROTO_TCP 6 /**< TCP */
#define APR_PROTO_UDP 17 /**< UDP */
#define APR_PROTO_SCTP 132 /**< SCTP */
/** @} */
/**
* Enum used to denote either the local and remote endpoint of a
* connection.
*/
typedef enum {
APR_LOCAL, /**< Socket information for local end of connection */
APR_REMOTE /**< Socket information for remote end of connection */
} apr_interface_e;
/**
* The specific declaration of inet_addr's ... some platforms fall back
* inet_network (this is not good, but necessary)
*/
#if APR_HAVE_INET_ADDR
#define apr_inet_addr inet_addr
#elif APR_HAVE_INET_NETWORK /* only DGUX, as far as I know */
/**
* @warning
* not generally safe... inet_network() and inet_addr() perform
* different functions */
#define apr_inet_addr inet_network
#endif
/** A structure to represent sockets */
typedef struct apr_socket_t apr_socket_t;
/**
* A structure to encapsulate headers and trailers for apr_socket_sendfile
*/
typedef struct apr_hdtr_t apr_hdtr_t;
/** A structure to represent in_addr */
typedef struct in_addr apr_in_addr_t;
/** A structure to represent an IP subnet */
typedef struct apr_ipsubnet_t apr_ipsubnet_t;
/** @remark use apr_uint16_t just in case some system has a short that isn't 16 bits... */
typedef apr_uint16_t apr_port_t;
/** @remark It's defined here as I think it should all be platform safe...
* @see apr_sockaddr_t
*/
typedef struct apr_sockaddr_t apr_sockaddr_t;
/**
* APRs socket address type, used to ensure protocol independence
*/
struct apr_sockaddr_t {
/** The pool to use... */
apr_pool_t *pool;
/** The hostname */
char *hostname;
/** Either a string of the port number or the service name for the port */
char *servname;
/** The numeric port */
apr_port_t port;
/** The family */
apr_int32_t family;
/** How big is the sockaddr we're using? */
apr_socklen_t salen;
/** How big is the ip address structure we're using? */
int ipaddr_len;
/** How big should the address buffer be? 16 for v4 or 46 for v6
* used in inet_ntop... */
int addr_str_len;
/** This points to the IP address structure within the appropriate
* sockaddr structure. */
void *ipaddr_ptr;
/** If multiple addresses were found by apr_sockaddr_info_get(), this
* points to a representation of the next address. */
apr_sockaddr_t *next;
/** Union of either IPv4 or IPv6 sockaddr. */
union {
/** IPv4 sockaddr structure */
struct sockaddr_in sin;
#if APR_HAVE_IPV6
/** IPv6 sockaddr structure */
struct sockaddr_in6 sin6;
#endif
#if APR_HAVE_SA_STORAGE
/** Placeholder to ensure that the size of this union is not
* dependent on whether APR_HAVE_IPV6 is defined. */
struct sockaddr_storage sas;
#endif
} sa;
};
#if APR_HAS_SENDFILE
/**
* Support reusing the socket on platforms which support it (from disconnect,
* specifically Win32.
* @remark Optional flag passed into apr_socket_sendfile()
*/
#define APR_SENDFILE_DISCONNECT_SOCKET 1
#endif
/** A structure to encapsulate headers and trailers for apr_socket_sendfile */
struct apr_hdtr_t {
/** An iovec to store the headers sent before the file. */
struct iovec* headers;
/** number of headers in the iovec */
int numheaders;
/** An iovec to store the trailers sent after the file. */
struct iovec* trailers;
/** number of trailers in the iovec */
int numtrailers;
};
/* function definitions */
/**
* Create a socket.
* @param new_sock The new socket that has been set up.
* @param family The address family of the socket (e.g., APR_INET).
* @param type The type of the socket (e.g., SOCK_STREAM).
* @param protocol The protocol of the socket (e.g., APR_PROTO_TCP).
* @param cont The pool for the apr_socket_t and associated storage.
*/
APR_DECLARE(apr_status_t) apr_socket_create(apr_socket_t **new_sock,
int family, int type,
int protocol,
apr_pool_t *cont);
/**
* Shutdown either reading, writing, or both sides of a socket.
* @param thesocket The socket to close
* @param how How to shutdown the socket. One of:
*
* APR_SHUTDOWN_READ no longer allow read requests
* APR_SHUTDOWN_WRITE no longer allow write requests
* APR_SHUTDOWN_READWRITE no longer allow read or write requests
*
* @see apr_shutdown_how_e
* @remark This does not actually close the socket descriptor, it just
* controls which calls are still valid on the socket.
*/
APR_DECLARE(apr_status_t) apr_socket_shutdown(apr_socket_t *thesocket,
apr_shutdown_how_e how);
/**
* Close a socket.
* @param thesocket The socket to close
*/
APR_DECLARE(apr_status_t) apr_socket_close(apr_socket_t *thesocket);
/**
* Bind the socket to its associated port
* @param sock The socket to bind
* @param sa The socket address to bind to
* @remark This may be where we will find out if there is any other process
* using the selected port.
*/
APR_DECLARE(apr_status_t) apr_socket_bind(apr_socket_t *sock,
apr_sockaddr_t *sa);
/**
* Listen to a bound socket for connections.
* @param sock The socket to listen on
* @param backlog The number of outstanding connections allowed in the sockets
* listen queue. If this value is less than zero, the listen
* queue size is set to zero.
*/
APR_DECLARE(apr_status_t) apr_socket_listen(apr_socket_t *sock,
apr_int32_t backlog);
/**
* Accept a new connection request
* @param new_sock A copy of the socket that is connected to the socket that
* made the connection request. This is the socket which should
* be used for all future communication.
* @param sock The socket we are listening on.
* @param connection_pool The pool for the new socket.
*/
APR_DECLARE(apr_status_t) apr_socket_accept(apr_socket_t **new_sock,
apr_socket_t *sock,
apr_pool_t *connection_pool);
/**
* Issue a connection request to a socket either on the same machine
* or a different one.
* @param sock The socket we wish to use for our side of the connection
* @param sa The address of the machine we wish to connect to.
*/
APR_DECLARE(apr_status_t) apr_socket_connect(apr_socket_t *sock,
apr_sockaddr_t *sa);
/**
* Create apr_sockaddr_t from hostname, address family, and port.
* @param sa The new apr_sockaddr_t.
* @param hostname The hostname or numeric address string to resolve/parse, or
* NULL to build an address that corresponds to 0.0.0.0 or ::
* @param family The address family to use, or APR_UNSPEC if the system should
* decide.
* @param port The port number.
* @param flags Special processing flags:
*
* APR_IPV4_ADDR_OK first query for IPv4 addresses; only look
* for IPv6 addresses if the first query failed;
* only valid if family is APR_UNSPEC and hostname
* isn't NULL; mutually exclusive with
* APR_IPV6_ADDR_OK
* APR_IPV6_ADDR_OK first query for IPv6 addresses; only look
* for IPv4 addresses if the first query failed;
* only valid if family is APR_UNSPEC and hostname
* isn't NULL and APR_HAVE_IPV6; mutually exclusive
* with APR_IPV4_ADDR_OK
*
* @param p The pool for the apr_sockaddr_t and associated storage.
*/
APR_DECLARE(apr_status_t) apr_sockaddr_info_get(apr_sockaddr_t **sa,
const char *hostname,
apr_int32_t family,
apr_port_t port,
apr_int32_t flags,
apr_pool_t *p);
/**
* Look up the host name from an apr_sockaddr_t.
* @param hostname The hostname.
* @param sa The apr_sockaddr_t.
* @param flags Special processing flags.
*/
APR_DECLARE(apr_status_t) apr_getnameinfo(char **hostname,
apr_sockaddr_t *sa,
apr_int32_t flags);
/**
* Parse hostname/IP address with scope id and port.
*
* Any of the following strings are accepted:
* 8080 (just the port number)
* www.apache.org (just the hostname)
* www.apache.org:8080 (hostname and port number)
* [fe80::1]:80 (IPv6 numeric address string only)
* [fe80::1%eth0] (IPv6 numeric address string and scope id)
*
* Invalid strings:
* (empty string)
* [abc] (not valid IPv6 numeric address string)
* abc:65536 (invalid port number)
*
* @param addr The new buffer containing just the hostname. On output, *addr
* will be NULL if no hostname/IP address was specfied.
* @param scope_id The new buffer containing just the scope id. On output,
* *scope_id will be NULL if no scope id was specified.
* @param port The port number. On output, *port will be 0 if no port was
* specified.
* ### FIXME: 0 is a legal port (per RFC 1700). this should
* ### return something besides zero if the port is missing.
* @param str The input string to be parsed.
* @param p The pool from which *addr and *scope_id are allocated.
* @remark If scope id shouldn't be allowed, check for scope_id != NULL in
* addition to checking the return code. If addr/hostname should be
* required, check for addr == NULL in addition to checking the
* return code.
*/
APR_DECLARE(apr_status_t) apr_parse_addr_port(char **addr,
char **scope_id,
apr_port_t *port,
const char *str,
apr_pool_t *p);
/**
* Get name of the current machine
* @param buf A buffer to store the hostname in.
* @param len The maximum length of the hostname that can be stored in the
* buffer provided. The suggested length is APRMAXHOSTLEN + 1.
* @param cont The pool to use.
* @remark If the buffer was not large enough, an error will be returned.
*/
APR_DECLARE(apr_status_t) apr_gethostname(char *buf, int len, apr_pool_t *cont);
/**
* Return the data associated with the current socket
* @param data The user data associated with the socket.
* @param key The key to associate with the user data.
* @param sock The currently open socket.
*/
APR_DECLARE(apr_status_t) apr_socket_data_get(void **data, const char *key,
apr_socket_t *sock);
/**
* Set the data associated with the current socket.
* @param sock The currently open socket.
* @param data The user data to associate with the socket.
* @param key The key to associate with the data.
* @param cleanup The cleanup to call when the socket is destroyed.
*/
APR_DECLARE(apr_status_t) apr_socket_data_set(apr_socket_t *sock, void *data,
const char *key,
apr_status_t (*cleanup)(void*));
/**
* Send data over a network.
* @param sock The socket to send the data over.
* @param buf The buffer which contains the data to be sent.
* @param len On entry, the number of bytes to send; on exit, the number
* of bytes sent.
* @remark
*
* This functions acts like a blocking write by default. To change
* this behavior, use apr_socket_timeout_set() or the APR_SO_NONBLOCK
* socket option.
*
* It is possible for both bytes to be sent and an error to be returned.
*
* APR_EINTR is never returned.
*
*/
APR_DECLARE(apr_status_t) apr_socket_send(apr_socket_t *sock, const char *buf,
apr_size_t *len);
/**
* Send multiple packets of data over a network.
* @param sock The socket to send the data over.
* @param vec The array of iovec structs containing the data to send
* @param nvec The number of iovec structs in the array
* @param len Receives the number of bytes actually written
* @remark
*
* This functions acts like a blocking write by default. To change
* this behavior, use apr_socket_timeout_set() or the APR_SO_NONBLOCK
* socket option.
* The number of bytes actually sent is stored in argument 3.
*
* It is possible for both bytes to be sent and an error to be returned.
*
* APR_EINTR is never returned.
*
*/
APR_DECLARE(apr_status_t) apr_socket_sendv(apr_socket_t *sock,
const struct iovec *vec,
apr_int32_t nvec, apr_size_t *len);
/**
* @param sock The socket to send from
* @param where The apr_sockaddr_t describing where to send the data
* @param flags The flags to use
* @param buf The data to send
* @param len The length of the data to send
*/
APR_DECLARE(apr_status_t) apr_socket_sendto(apr_socket_t *sock,
apr_sockaddr_t *where,
apr_int32_t flags, const char *buf,
apr_size_t *len);
/**
* Read data from a socket. On success, the address of the peer from
* which the data was sent is copied into the @param from parameter,
* and the @param len parameter is updated to give the number of bytes
* written to @param buf.
* @param from Updated with the address from which the data was received
* @param sock The socket to use
* @param flags The flags to use
* @param buf The buffer to use
* @param len The length of the available buffer
*/
APR_DECLARE(apr_status_t) apr_socket_recvfrom(apr_sockaddr_t *from,
apr_socket_t *sock,
apr_int32_t flags, char *buf,
apr_size_t *len);
#if APR_HAS_SENDFILE || defined(DOXYGEN)
/**
* Send a file from an open file descriptor to a socket, along with
* optional headers and trailers
* @param sock The socket to which we're writing
* @param file The open file from which to read
* @param hdtr A structure containing the headers and trailers to send
* @param offset Offset into the file where we should begin writing
* @param len (input) - Number of bytes to send from the file
* (output) - Number of bytes actually sent,
* including headers, file, and trailers
* @param flags APR flags that are mapped to OS specific flags
* @remark This functions acts like a blocking write by default. To change
* this behavior, use apr_socket_timeout_set() or the
* APR_SO_NONBLOCK socket option.
* The number of bytes actually sent is stored in the len parameter.
* The offset parameter is passed by reference for no reason; its
* value will never be modified by the apr_socket_sendfile() function.
*/
APR_DECLARE(apr_status_t) apr_socket_sendfile(apr_socket_t *sock,
apr_file_t *file,
apr_hdtr_t *hdtr,
apr_off_t *offset,
apr_size_t *len,
apr_int32_t flags);
#endif /* APR_HAS_SENDFILE */
/**
* Read data from a network.
* @param sock The socket to read the data from.
* @param buf The buffer to store the data in.
* @param len On entry, the number of bytes to receive; on exit, the number
* of bytes received.
* @remark
*
* This functions acts like a blocking read by default. To change
* this behavior, use apr_socket_timeout_set() or the APR_SO_NONBLOCK
* socket option.
* The number of bytes actually received is stored in argument 3.
*
* It is possible for both bytes to be received and an APR_EOF or
* other error to be returned.
*
* APR_EINTR is never returned.
*
*/
APR_DECLARE(apr_status_t) apr_socket_recv(apr_socket_t *sock,
char *buf, apr_size_t *len);
/**
* Setup socket options for the specified socket
* @param sock The socket to set up.
* @param opt The option we would like to configure. One of:
*
* APR_SO_DEBUG -- turn on debugging information
* APR_SO_KEEPALIVE -- keep connections active
* APR_SO_LINGER -- lingers on close if data is present
* APR_SO_NONBLOCK -- Turns blocking on/off for socket
* When this option is enabled, use
* the APR_STATUS_IS_EAGAIN() macro to
* see if a send or receive function
* could not transfer data without
* blocking.
* APR_SO_REUSEADDR -- The rules used in validating addresses
* supplied to bind should allow reuse
* of local addresses.
* APR_SO_SNDBUF -- Set the SendBufferSize
* APR_SO_RCVBUF -- Set the ReceiveBufferSize
*
* @param on Value for the option.
*/
APR_DECLARE(apr_status_t) apr_socket_opt_set(apr_socket_t *sock,
apr_int32_t opt, apr_int32_t on);
/**
* Setup socket timeout for the specified socket
* @param sock The socket to set up.
* @param t Value for the timeout.
*
* t > 0 -- read and write calls return APR_TIMEUP if specified time
* elapsess with no data read or written
* t == 0 -- read and write calls never block
* t < 0 -- read and write calls block
*
*/
APR_DECLARE(apr_status_t) apr_socket_timeout_set(apr_socket_t *sock,
apr_interval_time_t t);
/**
* Query socket options for the specified socket
* @param sock The socket to query
* @param opt The option we would like to query. One of:
*
* APR_SO_DEBUG -- turn on debugging information
* APR_SO_KEEPALIVE -- keep connections active
* APR_SO_LINGER -- lingers on close if data is present
* APR_SO_NONBLOCK -- Turns blocking on/off for socket
* APR_SO_REUSEADDR -- The rules used in validating addresses
* supplied to bind should allow reuse
* of local addresses.
* APR_SO_SNDBUF -- Set the SendBufferSize
* APR_SO_RCVBUF -- Set the ReceiveBufferSize
* APR_SO_DISCONNECTED -- Query the disconnected state of the socket.
* (Currently only used on Windows)
*
* @param on Socket option returned on the call.
*/
APR_DECLARE(apr_status_t) apr_socket_opt_get(apr_socket_t *sock,
apr_int32_t opt, apr_int32_t *on);
/**
* Query socket timeout for the specified socket
* @param sock The socket to query
* @param t Socket timeout returned from the query.
*/
APR_DECLARE(apr_status_t) apr_socket_timeout_get(apr_socket_t *sock,
apr_interval_time_t *t);
/**
* Query the specified socket if at the OOB/Urgent data mark
* @param sock The socket to query
* @param atmark Is set to true if socket is at the OOB/urgent mark,
* otherwise is set to false.
*/
APR_DECLARE(apr_status_t) apr_socket_atmark(apr_socket_t *sock,
int *atmark);
/**
* Return an address associated with a socket; either the address to
* which the socket is bound locally or the the address of the peer
* to which the socket is connected.
* @param sa The returned apr_sockaddr_t.
* @param which Whether to retrieve the local or remote address
* @param sock The socket to use
*/
APR_DECLARE(apr_status_t) apr_socket_addr_get(apr_sockaddr_t **sa,
apr_interface_e which,
apr_socket_t *sock);
/**
* Return the IP address (in numeric address string format) in
* an APR socket address. APR will allocate storage for the IP address
* string from the pool of the apr_sockaddr_t.
* @param addr The IP address.
* @param sockaddr The socket address to reference.
*/
APR_DECLARE(apr_status_t) apr_sockaddr_ip_get(char **addr,
apr_sockaddr_t *sockaddr);
/**
* Write the IP address (in numeric address string format) of the APR
* socket address @a sockaddr into the buffer @a buf (of size @a buflen).
* @param sockaddr The socket address to reference.
*/
APR_DECLARE(apr_status_t) apr_sockaddr_ip_getbuf(char *buf, apr_size_t buflen,
apr_sockaddr_t *sockaddr);
/**
* See if the IP addresses in two APR socket addresses are
* equivalent. Appropriate logic is present for comparing
* IPv4-mapped IPv6 addresses with IPv4 addresses.
*
* @param addr1 One of the APR socket addresses.
* @param addr2 The other APR socket address.
* @remark The return value will be non-zero if the addresses
* are equivalent.
*/
APR_DECLARE(int) apr_sockaddr_equal(const apr_sockaddr_t *addr1,
const apr_sockaddr_t *addr2);
/**
* Return the type of the socket.
* @param sock The socket to query.
* @param type The returned type (e.g., SOCK_STREAM).
*/
APR_DECLARE(apr_status_t) apr_socket_type_get(apr_socket_t *sock,
int *type);
/**
* Given an apr_sockaddr_t and a service name, set the port for the service
* @param sockaddr The apr_sockaddr_t that will have its port set
* @param servname The name of the service you wish to use
*/
APR_DECLARE(apr_status_t) apr_getservbyname(apr_sockaddr_t *sockaddr,
const char *servname);
/**
* Build an ip-subnet representation from an IP address and optional netmask or
* number-of-bits.
* @param ipsub The new ip-subnet representation
* @param ipstr The input IP address string
* @param mask_or_numbits The input netmask or number-of-bits string, or NULL
* @param p The pool to allocate from
*/
APR_DECLARE(apr_status_t) apr_ipsubnet_create(apr_ipsubnet_t **ipsub,
const char *ipstr,
const char *mask_or_numbits,
apr_pool_t *p);
/**
* Test the IP address in an apr_sockaddr_t against a pre-built ip-subnet
* representation.
* @param ipsub The ip-subnet representation
* @param sa The socket address to test
* @return non-zero if the socket address is within the subnet, 0 otherwise
*/
APR_DECLARE(int) apr_ipsubnet_test(apr_ipsubnet_t *ipsub, apr_sockaddr_t *sa);
#if APR_HAS_SO_ACCEPTFILTER || defined(DOXYGEN)
/**
* Set an OS level accept filter.
* @param sock The socket to put the accept filter on.
* @param name The accept filter
* @param args Any extra args to the accept filter. Passing NULL here removes
* the accept filter.
*/
apr_status_t apr_socket_accept_filter(apr_socket_t *sock, char *name,
char *args);
#endif
/**
* Return the protocol of the socket.
* @param sock The socket to query.
* @param protocol The returned protocol (e.g., APR_PROTO_TCP).
*/
APR_DECLARE(apr_status_t) apr_socket_protocol_get(apr_socket_t *sock,
int *protocol);
/**
* Get the pool used by the socket.
*/
APR_POOL_DECLARE_ACCESSOR(socket);
/**
* Set a socket to be inherited by child processes.
*/
APR_DECLARE_INHERIT_SET(socket);
/**
* Unset a socket from being inherited by child processes.
*/
APR_DECLARE_INHERIT_UNSET(socket);
/**
* @defgroup apr_mcast IP Multicast
* @{
*/
/**
* Join a Multicast Group
* @param sock The socket to join a multicast group
* @param join The address of the multicast group to join
* @param iface Address of the interface to use. If NULL is passed, the
* default multicast interface will be used. (OS Dependent)
* @param source Source Address to accept transmissions from (non-NULL
* implies Source-Specific Multicast)
*/
APR_DECLARE(apr_status_t) apr_mcast_join(apr_socket_t *sock,
apr_sockaddr_t *join,
apr_sockaddr_t *iface,
apr_sockaddr_t *source);
/**
* Leave a Multicast Group. All arguments must be the same as
* apr_mcast_join.
* @param sock The socket to leave a multicast group
* @param addr The address of the multicast group to leave
* @param iface Address of the interface to use. If NULL is passed, the
* default multicast interface will be used. (OS Dependent)
* @param source Source Address to accept transmissions from (non-NULL
* implies Source-Specific Multicast)
*/
APR_DECLARE(apr_status_t) apr_mcast_leave(apr_socket_t *sock,
apr_sockaddr_t *addr,
apr_sockaddr_t *iface,
apr_sockaddr_t *source);
/**
* Set the Multicast Time to Live (ttl) for a multicast transmission.
* @param sock The socket to set the multicast ttl
* @param ttl Time to live to Assign. 0-255, default=1
* @remark If the TTL is 0, packets will only be seen by sockets on
* the local machine, and only when multicast loopback is enabled.
*/
APR_DECLARE(apr_status_t) apr_mcast_hops(apr_socket_t *sock,
apr_byte_t ttl);
/**
* Toggle IP Multicast Loopback
* @param sock The socket to set multicast loopback
* @param opt 0=disable, 1=enable
*/
APR_DECLARE(apr_status_t) apr_mcast_loopback(apr_socket_t *sock,
apr_byte_t opt);
/**
* Set the Interface to be used for outgoing Multicast Transmissions.
* @param sock The socket to set the multicast interface on
* @param iface Address of the interface to use for Multicast
*/
APR_DECLARE(apr_status_t) apr_mcast_interface(apr_socket_t *sock,
apr_sockaddr_t *iface);
/** @} */
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* ! APR_NETWORK_IO_H */