Network Routines
[Apache Portability Runtime library]

Data Structures

struct  apr_sockaddr_t
struct  apr_hdtr_t

Modules

 Socket option definitions
 IP Protocol Definitions for use when creating sockets
 IP Multicast

Defines

#define APR_MAX_SECS_TO_LINGER   30
#define APRMAXHOSTLEN   256
#define APR_ANYADDR   "0.0.0.0"
#define APR_IPV4_ADDR_OK   0x01
#define APR_IPV6_ADDR_OK   0x02
#define APR_INADDR_NONE   ((unsigned int) 0xffffffff)
#define APR_INET   AF_INET
#define APR_UNSPEC   0
#define APR_INET6   AF_INET6
#define apr_inet_addr   inet_addr
#define APR_SENDFILE_DISCONNECT_SOCKET   1

Typedefs

typedef struct apr_socket_t apr_socket_t
typedef struct apr_hdtr_t apr_hdtr_t
typedef struct in_addr apr_in_addr_t
typedef struct apr_ipsubnet_t apr_ipsubnet_t
typedef apr_uint16_t apr_port_t
typedef struct apr_sockaddr_t apr_sockaddr_t

Enumerations

enum  apr_shutdown_how_e { APR_SHUTDOWN_READ, APR_SHUTDOWN_WRITE, APR_SHUTDOWN_READWRITE }
enum  apr_interface_e { APR_LOCAL, APR_REMOTE }

Functions

apr_status_t apr_socket_create (apr_socket_t **new_sock, int family, int type, int protocol, apr_pool_t *cont)
apr_status_t apr_socket_shutdown (apr_socket_t *thesocket, apr_shutdown_how_e how)
apr_status_t apr_socket_close (apr_socket_t *thesocket)
apr_status_t apr_socket_bind (apr_socket_t *sock, apr_sockaddr_t *sa)
apr_status_t apr_socket_listen (apr_socket_t *sock, apr_int32_t backlog)
apr_status_t apr_socket_accept (apr_socket_t **new_sock, apr_socket_t *sock, apr_pool_t *connection_pool)
apr_status_t apr_socket_connect (apr_socket_t *sock, apr_sockaddr_t *sa)
apr_status_t apr_socket_atreadeof (apr_socket_t *sock, int *atreadeof)
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)
apr_status_t apr_getnameinfo (char **hostname, apr_sockaddr_t *sa, apr_int32_t flags)
apr_status_t apr_parse_addr_port (char **addr, char **scope_id, apr_port_t *port, const char *str, apr_pool_t *p)
apr_status_t apr_gethostname (char *buf, int len, apr_pool_t *cont)
apr_status_t apr_socket_data_get (void **data, const char *key, apr_socket_t *sock)
apr_status_t apr_socket_data_set (apr_socket_t *sock, void *data, const char *key, apr_status_t(*cleanup)(void *))
apr_status_t apr_socket_send (apr_socket_t *sock, const char *buf, apr_size_t *len)
apr_status_t apr_socket_sendv (apr_socket_t *sock, const struct iovec *vec, apr_int32_t nvec, apr_size_t *len)
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)
apr_status_t apr_socket_recvfrom (apr_sockaddr_t *from, apr_socket_t *sock, apr_int32_t flags, char *buf, apr_size_t *len)
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)
apr_status_t apr_socket_recv (apr_socket_t *sock, char *buf, apr_size_t *len)
apr_status_t apr_socket_opt_set (apr_socket_t *sock, apr_int32_t opt, apr_int32_t on)
apr_status_t apr_socket_timeout_set (apr_socket_t *sock, apr_interval_time_t t)
apr_status_t apr_socket_opt_get (apr_socket_t *sock, apr_int32_t opt, apr_int32_t *on)
apr_status_t apr_socket_timeout_get (apr_socket_t *sock, apr_interval_time_t *t)
apr_status_t apr_socket_atmark (apr_socket_t *sock, int *atmark)
apr_status_t apr_socket_addr_get (apr_sockaddr_t **sa, apr_interface_e which, apr_socket_t *sock)
apr_status_t apr_sockaddr_ip_get (char **addr, apr_sockaddr_t *sockaddr)
apr_status_t apr_sockaddr_ip_getbuf (char *buf, apr_size_t buflen, apr_sockaddr_t *sockaddr)
int apr_sockaddr_equal (const apr_sockaddr_t *addr1, const apr_sockaddr_t *addr2)
apr_status_t apr_socket_type_get (apr_socket_t *sock, int *type)
apr_status_t apr_getservbyname (apr_sockaddr_t *sockaddr, const char *servname)
apr_status_t apr_ipsubnet_create (apr_ipsubnet_t **ipsub, const char *ipstr, const char *mask_or_numbits, apr_pool_t *p)
int apr_ipsubnet_test (apr_ipsubnet_t *ipsub, apr_sockaddr_t *sa)
apr_status_t apr_socket_accept_filter (apr_socket_t *sock, char *name, char *args)
apr_status_t apr_socket_protocol_get (apr_socket_t *sock, int *protocol)
apr_pool_t * apr_socket_pool_get (const apr_socket_t *thesocket)
apr_status_t apr_socket_inherit_set (apr_socket_t *thesocket)
apr_status_t apr_socket_inherit_unset (apr_socket_t *thesocket)

Define Documentation

#define APR_ANYADDR   "0.0.0.0"

Default 'any' address

#define APR_INADDR_NONE   ((unsigned int) 0xffffffff)

Not all platforms have a real INADDR_NONE. This macro replaces INADDR_NONE on all platforms.

#define APR_INET   AF_INET

Not all platforms have these defined, so we'll define them here The default values come from FreeBSD 4.1.1

#define APR_INET6   AF_INET6

IPv6 Address Family. Not all platforms may have this defined.

#define apr_inet_addr   inet_addr

The specific declaration of inet_addr's ... some platforms fall back inet_network (this is not good, but necessary)

#define APR_IPV4_ADDR_OK   0x01
See also:
apr_sockaddr_info_get()
#define APR_IPV6_ADDR_OK   0x02
See also:
apr_sockaddr_info_get()
#define APR_MAX_SECS_TO_LINGER   30

Maximum seconds to linger

#define APR_SENDFILE_DISCONNECT_SOCKET   1

Support reusing the socket on platforms which support it (from disconnect, specifically Win32.

Remarks:
Optional flag passed into apr_socket_sendfile()
#define APR_UNSPEC   0

Let the system decide which address family to use

#define APRMAXHOSTLEN   256

Maximum hostname length

Typedef Documentation

typedef struct apr_hdtr_t apr_hdtr_t

A structure to encapsulate headers and trailers for apr_socket_sendfile

typedef struct in_addr apr_in_addr_t

A structure to represent in_addr

typedef struct apr_ipsubnet_t apr_ipsubnet_t

A structure to represent an IP subnet

typedef apr_uint16_t apr_port_t
Remarks:
use apr_uint16_t just in case some system has a short that isn't 16 bits...
typedef struct apr_sockaddr_t apr_sockaddr_t
Remarks:
It's defined here as I think it should all be platform safe...
See also:
apr_sockaddr_t
typedef struct apr_socket_t apr_socket_t

A structure to represent sockets

Enumeration Type Documentation

enum apr_interface_e

Enum used to denote either the local and remote endpoint of a connection.

Enumerator:
APR_LOCAL 

Socket information for local end of connection

APR_REMOTE 

Socket information for remote end of connection

enum apr_shutdown_how_e

Define what type of socket shutdown should occur.

Enumerator:
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

Function Documentation

apr_status_t apr_gethostname ( char *  buf,
int  len,
apr_pool_t *  cont 
)

Get name of the current machine

Parameters:
buf A buffer to store the hostname in.
Parameters:
len The maximum length of the hostname that can be stored in the buffer provided. The suggested length is APRMAXHOSTLEN + 1.
Parameters:
cont The pool to use.
Remarks:
If the buffer was not large enough, an error will be returned.
apr_status_t apr_getnameinfo ( char **  hostname,
apr_sockaddr_t *  sa,
apr_int32_t  flags 
)

Look up the host name from an apr_sockaddr_t.

Parameters:
hostname The hostname.
Parameters:
sa The apr_sockaddr_t.
Parameters:
flags Special processing flags.
apr_status_t apr_getservbyname ( apr_sockaddr_t *  sockaddr,
const char *  servname 
)

Given an apr_sockaddr_t and a service name, set the port for the service

Parameters:
sockaddr The apr_sockaddr_t that will have its port set
Parameters:
servname The name of the service you wish to use
apr_status_t apr_ipsubnet_create ( apr_ipsubnet_t **  ipsub,
const char *  ipstr,
const char *  mask_or_numbits,
apr_pool_t *  p 
)

Build an ip-subnet representation from an IP address and optional netmask or number-of-bits.

Parameters:
ipsub The new ip-subnet representation
Parameters:
ipstr The input IP address string
Parameters:
mask_or_numbits The input netmask or number-of-bits string, or NULL
Parameters:
p The pool to allocate from
int apr_ipsubnet_test ( apr_ipsubnet_t *  ipsub,
apr_sockaddr_t *  sa 
)

Test the IP address in an apr_sockaddr_t against a pre-built ip-subnet representation.

Parameters:
ipsub The ip-subnet representation
Parameters:
sa The socket address to test
Returns:
non-zero if the socket address is within the subnet, 0 otherwise
apr_status_t apr_parse_addr_port ( char **  addr,
char **  scope_id,
apr_port_t *  port,
const char *  str,
apr_pool_t *  p 
)

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::1eth0] (IPv6 numeric address string and scope id)

Invalid strings: (empty string) [abc] (not valid IPv6 numeric address string) abc:65536 (invalid port number)

Parameters:
addr The new buffer containing just the hostname. On output, *addr will be NULL if no hostname/IP address was specfied.
Parameters:
scope_id The new buffer containing just the scope id. On output, *scope_id will be NULL if no scope id was specified.
Parameters:
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.
Parameters:
str The input string to be parsed.
Parameters:
p The pool from which *addr and *scope_id are allocated.
Remarks:
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.
int apr_sockaddr_equal ( const apr_sockaddr_t *  addr1,
const apr_sockaddr_t *  addr2 
)

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.

Parameters:
addr1 One of the APR socket addresses.
Parameters:
addr2 The other APR socket address.
Remarks:
The return value will be non-zero if the addresses are equivalent.
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 
)

Create apr_sockaddr_t from hostname, address family, and port.

Parameters:
sa The new apr_sockaddr_t.
Parameters:
hostname The hostname or numeric address string to resolve/parse, or NULL to build an address that corresponds to 0.0.0.0 or ::
Parameters:
family The address family to use, or APR_UNSPEC if the system should decide.
Parameters:
port The port number.
Parameters:
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
Parameters:
p The pool for the apr_sockaddr_t and associated storage.
apr_status_t apr_sockaddr_ip_get ( char **  addr,
apr_sockaddr_t *  sockaddr 
)

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.

Parameters:
addr The IP address.
Parameters:
sockaddr The socket address to reference.
apr_status_t apr_sockaddr_ip_getbuf ( char *  buf,
apr_size_t  buflen,
apr_sockaddr_t *  sockaddr 
)

Write the IP address (in numeric address string format) of the APR socket address sockaddr into the buffer buf (of size buflen).

Parameters:
sockaddr The socket address to reference.
apr_status_t apr_socket_accept ( apr_socket_t **  new_sock,
apr_socket_t *  sock,
apr_pool_t *  connection_pool 
)

Accept a new connection request

Parameters:
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.
Parameters:
sock The socket we are listening on.
Parameters:
connection_pool The pool for the new socket.
apr_status_t apr_socket_accept_filter ( apr_socket_t *  sock,
char *  name,
char *  args 
)

Set an OS level accept filter.

Parameters:
sock The socket to put the accept filter on.
Parameters:
name The accept filter
Parameters:
args Any extra args to the accept filter. Passing NULL here removes the accept filter.
apr_status_t apr_socket_addr_get ( apr_sockaddr_t **  sa,
apr_interface_e  which,
apr_socket_t *  sock 
)

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.

Parameters:
sa The returned apr_sockaddr_t.
Parameters:
which Whether to retrieve the local or remote address
Parameters:
sock The socket to use
apr_status_t apr_socket_atmark ( apr_socket_t *  sock,
int *  atmark 
)

Query the specified socket if at the OOB/Urgent data mark

Parameters:
sock The socket to query
Parameters:
atmark Is set to true if socket is at the OOB/urgent mark, otherwise is set to false.
apr_status_t apr_socket_atreadeof ( apr_socket_t *  sock,
int *  atreadeof 
)

Determine whether the receive part of the socket has been closed by the peer (such that a subsequent call to apr_socket_read would return APR_EOF), if the socket's receive buffer is empty. This function does not block waiting for I/O.

Parameters:
sock The socket to check
Parameters:
atreadeof If APR_SUCCESS is returned, *atreadeof is set to non-zero if a subsequent read would return APR_EOF
Returns:
an error is returned if it was not possible to determine the status, in which case *atreadeof is not changed.
apr_status_t apr_socket_bind ( apr_socket_t *  sock,
apr_sockaddr_t *  sa 
)

Bind the socket to its associated port

Parameters:
sock The socket to bind
Parameters:
sa The socket address to bind to
Remarks:
This may be where we will find out if there is any other process using the selected port.
apr_status_t apr_socket_close ( apr_socket_t *  thesocket  ) 

Close a socket.

Parameters:
thesocket The socket to close
apr_status_t apr_socket_connect ( apr_socket_t *  sock,
apr_sockaddr_t *  sa 
)

Issue a connection request to a socket either on the same machine or a different one.

Parameters:
sock The socket we wish to use for our side of the connection
Parameters:
sa The address of the machine we wish to connect to.
apr_status_t apr_socket_create ( apr_socket_t **  new_sock,
int  family,
int  type,
int  protocol,
apr_pool_t *  cont 
)

Create a socket.

Parameters:
new_sock The new socket that has been set up.
Parameters:
family The address family of the socket (e.g., APR_INET).
Parameters:
type The type of the socket (e.g., SOCK_STREAM).
Parameters:
protocol The protocol of the socket (e.g., APR_PROTO_TCP).
Parameters:
cont The pool for the apr_socket_t and associated storage.
apr_status_t apr_socket_data_get ( void **  data,
const char *  key,
apr_socket_t *  sock 
)

Return the data associated with the current socket

Parameters:
data The user data associated with the socket.
Parameters:
key The key to associate with the user data.
Parameters:
sock The currently open socket.
apr_status_t apr_socket_data_set ( apr_socket_t *  sock,
void *  data,
const char *  key,
apr_status_t(*)(void *)  cleanup 
)

Set the data associated with the current socket.

Parameters:
sock The currently open socket.
Parameters:
data The user data to associate with the socket.
Parameters:
key The key to associate with the data.
Parameters:
cleanup The cleanup to call when the socket is destroyed.
apr_status_t apr_socket_inherit_set ( apr_socket_t *  thesocket  ) 

Set a socket to be inherited by child processes.

apr_status_t apr_socket_inherit_unset ( apr_socket_t *  thesocket  ) 

Unset a socket from being inherited by child processes.

apr_status_t apr_socket_listen ( apr_socket_t *  sock,
apr_int32_t  backlog 
)

Listen to a bound socket for connections.

Parameters:
sock The socket to listen on
Parameters:
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_status_t apr_socket_opt_get ( apr_socket_t *  sock,
apr_int32_t  opt,
apr_int32_t *  on 
)

Query socket options for the specified socket

Parameters:
sock The socket to query
Parameters:
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)
Parameters:
on Socket option returned on the call.
apr_status_t apr_socket_opt_set ( apr_socket_t *  sock,
apr_int32_t  opt,
apr_int32_t  on 
)

Setup socket options for the specified socket

Parameters:
sock The socket to set up.
Parameters:
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
Parameters:
on Value for the option.
apr_pool_t* apr_socket_pool_get ( const apr_socket_t *  thesocket  ) 

Get the pool used by the socket.

apr_status_t apr_socket_protocol_get ( apr_socket_t *  sock,
int *  protocol 
)

Return the protocol of the socket.

Parameters:
sock The socket to query.
Parameters:
protocol The returned protocol (e.g., APR_PROTO_TCP).
apr_status_t apr_socket_recv ( apr_socket_t *  sock,
char *  buf,
apr_size_t *  len 
)

Read data from a network.

Parameters:
sock The socket to read the data from.
Parameters:
buf The buffer to store the data in.
Parameters:
len On entry, the number of bytes to receive; on exit, the number of bytes received.
Remarks:
 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_status_t apr_socket_recvfrom ( apr_sockaddr_t *  from,
apr_socket_t *  sock,
apr_int32_t  flags,
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 from parameter, and the len parameter is updated to give the number of bytes written to buf.

Parameters:
from Updated with the address from which the data was received
Parameters:
sock The socket to use
Parameters:
flags The flags to use
Parameters:
buf The buffer to use
Parameters:
len The length of the available buffer
apr_status_t apr_socket_send ( apr_socket_t *  sock,
const char *  buf,
apr_size_t *  len 
)

Send data over a network.

Parameters:
sock The socket to send the data over.
Parameters:
buf The buffer which contains the data to be sent.
Parameters:
len On entry, the number of bytes to send; on exit, the number of bytes sent.
Remarks:
 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_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 
)

Send a file from an open file descriptor to a socket, along with optional headers and trailers

Parameters:
sock The socket to which we're writing
Parameters:
file The open file from which to read
Parameters:
hdtr A structure containing the headers and trailers to send
Parameters:
offset Offset into the file where we should begin writing
Parameters:
len (input) - Number of bytes to send from the file (output) - Number of bytes actually sent, including headers, file, and trailers
Parameters:
flags APR flags that are mapped to OS specific flags
Remarks:
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_status_t apr_socket_sendto ( apr_socket_t *  sock,
apr_sockaddr_t *  where,
apr_int32_t  flags,
const char *  buf,
apr_size_t *  len 
)
Parameters:
sock The socket to send from
Parameters:
where The apr_sockaddr_t describing where to send the data
Parameters:
flags The flags to use
Parameters:
buf The data to send
Parameters:
len The length of the data to send
apr_status_t apr_socket_sendv ( apr_socket_t *  sock,
const struct iovec *  vec,
apr_int32_t  nvec,
apr_size_t *  len 
)

Send multiple packets of data over a network.

Parameters:
sock The socket to send the data over.
Parameters:
vec The array of iovec structs containing the data to send
Parameters:
nvec The number of iovec structs in the array
Parameters:
len Receives the number of bytes actually written
Remarks:
 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_status_t apr_socket_shutdown ( apr_socket_t *  thesocket,
apr_shutdown_how_e  how 
)

Shutdown either reading, writing, or both sides of a socket.

Parameters:
thesocket The socket to close
Parameters:
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 also:
apr_shutdown_how_e
Remarks:
This does not actually close the socket descriptor, it just controls which calls are still valid on the socket.
apr_status_t apr_socket_timeout_get ( apr_socket_t *  sock,
apr_interval_time_t *  t 
)

Query socket timeout for the specified socket

Parameters:
sock The socket to query
Parameters:
t Socket timeout returned from the query.
apr_status_t apr_socket_timeout_set ( apr_socket_t *  sock,
apr_interval_time_t  t 
)

Setup socket timeout for the specified socket

Parameters:
sock The socket to set up.
Parameters:
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_status_t apr_socket_type_get ( apr_socket_t *  sock,
int *  type 
)

Return the type of the socket.

Parameters:
sock The socket to query.
Parameters:
type The returned type (e.g., SOCK_STREAM).
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