NAME¶

ost::UDPSocket - UDP sockets implement the TCP SOCK_DGRAM UDP protocol.

SYNOPSIS¶

#include <socket.h> Inherits ost::Socket. Inherited by ost::UDPBroadcast, ost::UDPReceive [protected], and ost::UDPTransmit [protected].

Public Member Functions¶

UDPSocket (Family family=IPV4) Create an unbound UDP socket, mostly for internal use. UDPSocket (const char *name, Family family=IPV4) Create a UDP socket bound by a service name. UDPSocket (const IPV4Address &bind, tpport_t port) Create a UDP socket and bind it to a specific interface and port address so that other UDP sockets on remote machines (or the same host) may find and send UDP messages to it. UDPSocket (const IPV6Address &bind, tpport_t port) virtual ~UDPSocket () Destroy a UDP socket as a socket. Error setLoopback (bool enable) Set the loopback. Error setMulticast (bool enable) Set the multicast. Error setTimeToLive (char ttl) Set time to live. void setPeer (const IPV4Host &host, tpport_t port) set the peer address to send message packets to. void connect (const IPV4Host &host, tpport_t port) void setPeer (const IPV6Host &host, tpport_t port) void connect (const IPV6Host &host, tpport_t port) Socket::Error getInterfaceIndex (const char *ethX, int &InterfaceIndex) get the interface index for a named network device Socket::Error join (const IPV4Multicast &ia, int InterfaceIndex) join a multicast group on a particular interface ssize_t send (const void *buf, size_t len) Send a message packet to a peer host. ssize_t receive (void *buf, size_t len, bool reply=false) Receive a message from any host. IPV4Host getIPV4Peer (tpport_t *port=NULL) const Examine address of sender of next waiting packet. IPV4Host getPeer ( tpport_t *port=NULL) const IPV6Host getIPV6Peer (tpport_t *port=NULL) const ssize_t peek (void *buf, size_t len) Examine contents of next waiting packet. void setPeer (const char *service) Associate socket with a named connection. void connect (const char *service) Error disconnect (void) Disassociate this socket from any host connection.

Protected Attributes¶

union { struct sockaddr_in6 ipv6 struct sockaddr_in ipv4 } peer Family family

Additional Inherited Members¶

Detailed Description¶

UDP sockets implement the TCP SOCK_DGRAM UDP protocol. They can be used to pass unverified messages between hosts, or to broadcast a specific message to an entire subnet. Please note that Streaming of realtime data commonly use UDPDuplex related classes rather than UDPSocket. In addition to connected TCP sessions, Common C++ supports UDP sockets and these also cover a range of functionality. Like a TCPSocket, A UDPSocket can be created bound to a specific network interface and/or port address, though this is not required. UDP sockets also are usually either connected or otherwise 'associated' with a specific 'peer' UDP socket. Since UDP sockets operate through discreet packets, there are no streaming operators used with UDP sockets. In addition to the UDP 'socket' class, there is a 'UDPBroadcast' class. The UDPBroadcast is a socket that is set to send messages to a subnet as a whole rather than to an individual peer socket that it may be associated with. UDP sockets are often used for building 'realtime' media streaming protocols and full duplex messaging services. When used in this manner, typically a pair of UDP sockets are used together; one socket is used to send and the other to receive data with an associated pair of UDP sockets on a 'peer' host. This concept is represented through the Common C++ UDPDuplex object, which is a pair of sockets that communicate with another UDPDuplex pair. Author:

Constructor & Destructor Documentation¶

ost::UDPSocket::UDPSocket (Familyfamily = IPV4)¶

Create an unbound UDP socket, mostly for internal use.

ost::UDPSocket::UDPSocket (const char *name, Familyfamily = IPV4)¶

Create a UDP socket bound by a service name.

ost::UDPSocket::UDPSocket (const IPV4Address &bind, tpport_tport)¶

Create a UDP socket and bind it to a specific interface and port address so that other UDP sockets on remote machines (or the same host) may find and send UDP messages to it. On failure to bind, an exception is thrown.

 @param bind address to bind this socket to.
 @param port number to bind this socket to.

ost::UDPSocket::UDPSocket (const IPV6Address &bind, tpport_tport)¶

virtual ost::UDPSocket::~UDPSocket () [virtual]¶

Destroy a UDP socket as a socket.

Member Function Documentation¶

void ost::UDPSocket::connect (const IPV4Host &host, tpport_tport)¶

Reimplemented in ost::UDPDuplex, ost::UDPReceive, and ost::UDPTransmit.

void ost::UDPSocket::connect (const IPV6Host &host, tpport_tport)¶

Reimplemented in ost::UDPDuplex, and ost::UDPReceive.

void ost::UDPSocket::connect (const char *service)¶

Error ost::UDPSocket::disconnect (void)¶

Disassociate this socket from any host connection. No data should be read or written until a connection is established. Reimplemented in ost::UDPDuplex.

Socket::Error ost::UDPSocket::getInterfaceIndex (const char *ethX, int &InterfaceIndex)¶

get the interface index for a named network device Parameters:

IPV4Host ost::UDPSocket::getIPV4Peer (tpport_t *port = NULL) const¶

Examine address of sender of next waiting packet. This also sets 'peer' address to the sender so that the next 'send' message acts as a 'reply'. This additional behavior overides the standard socket getSender behavior. Parameters: Reimplemented from ost::Socket.

IPV6Host ost::UDPSocket::getIPV6Peer (tpport_t *port = NULL) const¶

Reimplemented from ost::Socket.

IPV4Host ost::UDPSocket::getPeer (tpport_t *port = NULL) const [inline]¶

Reimplemented from ost::Socket.

Socket::Error ost::UDPSocket::join (const IPV4Multicast &ia, intInterfaceIndex)¶

join a multicast group on a particular interface Parameters:

ssize_t ost::UDPSocket::peek (void *buf, size_tlen) [inline]¶

Examine contents of next waiting packet. Parameters: Returns: References _IOLEN64.

ssize_t ost::UDPSocket::receive (void *buf, size_tlen, boolreply = false)¶

Receive a message from any host. Parameters: Returns:

ssize_t ost::UDPSocket::send (const void *buf, size_tlen)¶

Send a message packet to a peer host. Parameters: Returns: Reimplemented in ost::UDPTransmit.

Error ost::UDPSocket::setLoopback (boolenable) [inline]¶

Set the loopback. References ost::Socket::setLoopbackByFamily().

Error ost::UDPSocket::setMulticast (boolenable) [inline]¶

Set the multicast. Reimplemented in ost::UDPReceive, and ost::UDPTransmit. References ost::Socket::setMulticastByFamily().

void ost::UDPSocket::setPeer (const IPV4Host &host, tpport_tport)¶

set the peer address to send message packets to. This can be set before every send() call if nessisary. Parameters:

void ost::UDPSocket::setPeer (const IPV6Host &host, tpport_tport)¶

void ost::UDPSocket::setPeer (const char *service)¶

Associate socket with a named connection.

Error ost::UDPSocket::setTimeToLive (charttl) [inline]¶

Set time to live. References ost::Socket::setTimeToLiveByFamily().

Member Data Documentation¶

Family ost::UDPSocket::family [protected]¶

struct sockaddr_in ost::UDPSocket::ipv4¶

struct sockaddr_in6 ost::UDPSocket::ipv6¶

union { ... } ost::UDPSocket::peer [protected]¶

Author¶

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