libcomm Globals

Annotated List Files Globals Hierarchy Index

comm_api.h

• extern int  comm_init (void)
• extern int  comm_open_tcp (int family)
• extern int  comm_open_udp (int family)
• extern int  comm_close (int sock)
• extern int  comm_bind_tcp4 (const struct in_addr *my_addr, unsigned short my_port)
• extern int  comm_bind_tcp6 (const struct in6_addr *my_addr, unsigned short my_port)
• extern int  comm_bind_udp4 (const struct in_addr *my_addr, unsigned short my_port)
• extern int  comm_bind_udp6 (const struct in6_addr *my_addr, unsigned short my_port)
• extern int  comm_bind_join_udp4 (const struct in_addr *mcast_addr, const struct in_addr *join_if_addr, unsigned short my_port, bool reuse_flag)
• extern int  comm_bind_join_udp6 (const struct in6_addr *mcast_addr, uint join_if_addr, unsigned short my_port, bool reuse_flag)
• extern int  comm_connect_tcp4 (const struct in_addr *remote_addr, unsigned short remote_port)
• extern int  comm_connect_tcp6 (const struct in6_addr *remote_addr, unsigned short remote_port)
• extern int  comm_connect_udp4 (const struct in_addr *remote_addr, unsigned short remote_port)
• extern int  comm_connect_udp6 (const struct in6_addr *remote_addr, unsigned short remote_port)
• extern int  comm_bind_connect_udp4 (const struct in_addr *local_addr, unsigned short local_port, const struct in_addr *remote_addr, unsigned short remote_port)
• extern int  comm_bind_connect_udp6 (const struct in6_addr *local_addr, unsigned short local_port, const struct in6_addr *remote_addr, unsigned short remote_port)
• extern int  comm_sock_open (int domain, int type, int protocol)
• extern int  comm_sock_bind4 (int sock, const struct in_addr *my_addr, unsigned short my_port)
• extern int  comm_sock_bind6 (int sock, const struct in6_addr *my_addr, unsigned short my_port)
• extern int  comm_sock_join4 (int sock, const struct in_addr *mcast_addr, const struct in_addr *my_addr)
• extern int  comm_sock_join6 (int sock, const struct in6_addr *mcast_addr, unsigned int my_ifindex)
• extern int  comm_sock_connect4 (int sock, const struct in_addr *remote_addr, unsigned short remote_port)
• extern int  comm_sock_connect6 (int sock, const struct in6_addr *remote_addr, unsigned short remote_port)
• extern int  comm_sock_accept (int sock)
• extern int  comm_sock_close (int sock)
• extern int  comm_set_nodelay (int sock, int val)
• extern int  comm_set_reuseaddr (int sock, int val)
• extern int  comm_set_reuseport (int sock, int val)
• extern int  comm_set_loopback (int sock, int val)
• extern int  comm_set_ttl (int sock, int val)
• extern int  comm_set_iface4 (int sock, const struct in_addr *in_addr)
• extern int  comm_set_iface6 (int sock, u_int ifindex)
• extern int  comm_sock_set_sndbuf (int sock, int desired_bufsize, int min_bufsize)
• extern int  comm_sock_set_rcvbuf (int sock, int desired_bufsize, int min_bufsize)
• extern int  socket2family (int sock)

Global member Documentation

#include <comm_api.h>

Init stuff. Need to be called only once (during startup).

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open a TCP socket.

Parameters:

family

the address family.

Returns: the new socket on success, otherwsise XORP_ERROR.

#include <comm_api.h>

Open an UDP socket.

Parameters:

family

the address family.

Returns: the new socket on success, otherwsise XORP_ERROR.

#include <comm_api.h>

Close a socket.

Parameters:

sock	the socket to close.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv4 TCP socket and bind it to a local address and a port.

Parameters:

my_addr	the local IPv4 address to bind to (in network order). If it is NULL, will bind to `any' local address.
my_port	the local port to bind to (in network order).

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv6 TCP socket and bind it to a local address and a port.

Parameters:

my_addr	the local IPv6 address to bind to (in network order). If it is NULL, will bind to `any' local address.
my_port	the local port to bind to (in network order).

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv4 UDP socket and bind it to a local address and a port.

Parameters:

my_addr	the local IPv4 address to bind to (in network order). If it is NULL, will bind to `any' local address.
my_port	the local port to bind to (in network order).

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv6 UDP socket and bind it to a local address and a port.

Parameters:

my_addr	the local IPv6 address to bind to (in network order). If it is NULL, will bind to `any' local address.
my_port	the local port to bind to (in network order).

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv4 UDP socket on an interface, bind it to a multicast address and a port, and join that multicast group.

Parameters:

mcast_addr	the multicast address to bind to and join.
join_if_addr	the local unicast interface address (in network order) to join the multicast group on. If it is NULL, the system will choose the interface each time a datagram is sent.
my_port	the port to bind to (in network order).
reuse_flag	if true, allow other sockets to bind to the same multicast address and port, otherwise disallow it.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv6 UDP socket on an interface, bind it to a multicast address and a port, and join that multicast group.

Parameters:

mcast_addr	the multicast address to bind to and join.
join_if_addr	the local unicast interface index to join the multicast group on. If it is 0, the system will choose the interface each time a datagram is sent.
my_port	the port to bind to (in network order).
reuse_flag	if true, allow other sockets to bind to the same multicast address and port, otherwise disallow it.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv4 TCP socket, and connect it to a remote address and port. TODO: XXX: because it may take time to connect on a TCP socket, the return value actually is XORP_OK even though the connect did not complete.

Parameters:

remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv6 TCP socket, and connect it to a remote address and port.

TODO: XXX: because it may take time to connect on a TCP socket, the return value actually is XORP_OK even though the connect did not complete.

Parameters:

remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv4 UDP socket, and connect it to a remote address and port.

Parameters:

remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv6 UDP socket, and connect it to a remote address and port.

Parameters:

remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv4 UDP socket, bind it to a local address and a port, and connect it to a remote address and port.

Parameters:

local_addr	the local address to bind to. If it is NULL, will bind to `any' local address.
local_port	the local port to bind to.
remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open an IPv6 UDP socket, bind it to a local address and a port, and connect it to a remote address and port.

Parameters:

local_addr	the local address to bind to. If it is NULL, will bind to `any' local address.
local_port	the local port to bind to.
remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: the new socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Open a socket of domain = domain, type = type, and protocol = @protocol.

The sending and receiving buffer size are set, and the socket itself is set to non-blocking, and with TCP_NODELAY (if a TCP socket).

Parameters:

domain	the domain of the socket (e.g., AF_INET, AF_INET6).
type	the type of the socket (e.g., SOCK_STREAM, SOCK_DGRAM).
protocol	the particular protocol to be used with the socket.

Returns: the open socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Bind an IPv4 socket to an address and a port.

Parameters:

sock	the socket to bind.
my_addr	the address to bind to (in network order). If it is NULL, will bind to `any' local address.
my_port	the port to bind to (in network order).

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Bind an IPv6 socket to an address and a port.

Parameters:

sock	the socket to bind.
my_addr	the address to bind to (in network order). If it is NULL, will bind to `any' local address.
my_port	the port to bind to (in network order).

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Join an IPv4 multicast group on a socket (and an interface).

Parameters:

sock	the socket to join the group.
mcast_addr	the multicast address to join.
my_addr	the local unicast address of an interface to join. If it is NULL, the interface is chosen by the kernel.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Join an IPv6 multicast group on a socket (and an interface).

Parameters:

sock	he socket to join the group.
mcast_addr	the multicast address to join.
my_ifindex	the local unicast interface index to join. If it is 0, the interface is chosen by the kernel.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Connect to a remote IPv4 address.

XXX: We can use this not only for TCP, but for UDP sockets as well. TODO: XXX: because it may take time to connect on a TCP socket, the return value actually is XORP_OK even though the connect did not complete.

Parameters:

sock	the socket to use to connect.
remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Connect to a remote IPv6 address.

XXX: We can use this not only for TCP, but for UDP sockets as well. TODO: XXX: because it may take time to connect on a TCP socket, the return value actually is XORP_OK even though the connect did not complete.

Parameters:

sock	the socket to use to connect.
remote_addr	the remote address to connect to.
remote_port	the remote port to connect to.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Accept a connection on a listening socket.

Parameters:

sock	the listening socket to accept on.

Returns: the accepted socket on success, otherwise XORP_ERROR.

#include <comm_api.h>

Close a socket.

Parameters:

sock	the socket to close.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set/reset the TCP_NODELAY option on a TCP socket.

Parameters:

sock	the socket whose option we want to set/reset.
val	if non-zero, the option will be set, otherwise will be reset.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set/reset the SO_REUSEADDR option on a socket.

XXX: if the OS doesn't support this option, XORP_ERROR is returned.

Parameters:

sock	the socket whose option we want to set/reset.
val	if non-zero, the option will be set, otherwise will be reset.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set/reset the SO_REUSEPORT option on a socket.

XXX: if the OS doesn't support this option, XORP_ERROR is returned.

Parameters:

sock	the socket whose option we want to set/reset.
val	if non-zero, the option will be set, otherwise will be reset.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set/reset the multicast loopback option on a socket.

Parameters:

sock	the socket whose option we want to set/reset.
val	if non-zero, the option will be set, otherwise will be reset.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set the TTL of the outgoing multicast packets on a socket.

Parameters:

sock	the socket whose TTL we want to set.
val	the TTL of the outgoing multicast packets.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set default interface for IPv4 outgoing multicast on a socket.

Parameters:

sock	the socket whose default multicast interface to set.
in_addr	the IPv4 address of the default interface to set. If in_addr is NULL, the system will choose the interface each time a datagram is sent.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set default interface for IPv6 outgoing multicast on a socket.

Parameters:

sock	the socket whose default multicast interface to set.
ifindex	the IPv6 interface index of the default interface to set. If ifindex is 0, the system will choose the interface each time a datagram is sent.

Returns: XORP_OK on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set the sending buffer size of a socket.

Parameters:

sock	the socket whose sending buffer size to set.
desired_bufsize	the preferred buffer size.
min_bufsize	the smallest acceptable buffer size.

Returns: the successfully set buffer size on success, otherwise XORP_ERROR.

#include <comm_api.h>

Set the receiving buffer size of a socket.

Parameters:

sock	the socket whose receiving buffer size to set.
desired_bufsize	the preferred buffer size.
min_bufsize	the smallest acceptable buffer size.

Returns: the successfully set buffer size on success, otherwise XORP_ERROR.

#include <comm_api.h>

Get the address family of a socket.

XXX: idea taken from W. Stevens' UNPv1, 2e (pp 109)

Parameters:

sock	the socket whose address family we need to get.

Returns: the address family on success, otherwise XORP_ERROR.