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NAME

       bind - bind a name to a socket

SYNOPSIS

       #include <network.h>

       int   bind(int   sockfd,  struct  sockaddr  *my_addr,  int

       addrlen);

DESCRIPTION

       bind gives the socket sockfd the  local  address  my_addr.

       my_addr  is  addrlen  bytes  long.  Traditionally, this is

       called "assigning a name to a socket."  (When a socket  is

       created with socket(2), it exists in a name space (address

       family) but has no name assigned.)

       Before a SOCK_STREAM socket is put into the  LISTEN  state

       to receive connections, you usually need to first assign a

       local address using bind to make the socket visible.

NOTES

       Binding a name that is not in the  abstract  namespace  in

       the  UNIX  domain creates a socket in the file system that

       must be deleted by the caller when it is no longer  needed

       (using unlink(2)).

       The  rules used in name binding vary between communication

       domains.  Consult the manual  entries  in  section  4  for

       detailed information. For IP see ip(4) and for PF_UNIX see

       unix(4).  If you want to listen to every  local  interface

       for  IPv4 set the sin_addr member of the IP-specific sock-

       addr_in to INADDR_ANY.  For IP  only  one  socket  may  be

       bound  to  a  specific  local address/port pair. For TCP a

       bound  local  socket  endpoint  (address/port   pair)   is

       unavailable for some time after closing the socket, unless

       the SO_REUSEADDR flag is set. Note that carelessly setting

       SO_REUSEADDR might make TCP more unreliable unless PAWS is

       used (see tcp(4)); the delay is needed to handle old pack-

       ets still in the network.

       IP  sockets  may  also  bind  to  a broadcast or multicast

       address.

RETURN VALUE

       On success, zero is returned.  On error, -1  is  returned,

       and errno is set appropriately.

ERRORS

       EBADF   sockfd is not a valid descriptor.

       EINVAL  The  socket  is already bound to an address.  This

               may change in the  future:  see  linux/unix/sock.c

               for details.

       ENOTSOCK

               Argument is a descriptor for a file, not a socket.