=pod =head1 NAME BIO_s_connect, BIO_set_conn_hostname, BIO_set_conn_port, BIO_set_conn_ip, BIO_set_conn_int_port, BIO_get_conn_hostname, BIO_get_conn_port, BIO_get_conn_ip, BIO_get_conn_int_port, BIO_set_nbio, BIO_do_connect - connect BIO =head1 SYNOPSIS #include BIO_METHOD * BIO_s_connect(void); #define BIO_set_conn_hostname(b,name) BIO_ctrl(b,BIO_C_SET_CONNECT,0,(char *)name) #define BIO_set_conn_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,1,(char *)port) #define BIO_set_conn_ip(b,ip) BIO_ctrl(b,BIO_C_SET_CONNECT,2,(char *)ip) #define BIO_set_conn_int_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,3,(char *)port) #define BIO_get_conn_hostname(b) BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,0) #define BIO_get_conn_port(b) BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,1) #define BIO_get_conn_ip(b,ip) BIO_ptr_ctrl(b,BIO_C_SET_CONNECT,2) #define BIO_get_conn_int_port(b,port) BIO_int_ctrl(b,BIO_C_SET_CONNECT,3,port) #define BIO_set_nbio(b,n) BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL) #define BIO_do_connect(b) BIO_do_handshake(b) =head1 DESCRIPTION BIO_s_connect() returns the connect BIO method. This is a wrapper round the platform's TCP/IP socket connection routines. Using connect BIOs TCP/IP connections can be made and data transferred using only BIO routines. In this way any platform specific operations are hidden by the BIO abstraction. Read and write operations on a connect BIO will perform I/O on the underlying connection. If no connection is established and the port and hostname (see below) is set up properly then a connection is established first. Connect BIOs support BIO_puts() but not BIO_gets(). If the close flag is set on a connect BIO then any active connection is shutdown and the socket closed when the BIO is freed. Calling BIO_reset() on a connect BIO will close any active connection and reset the BIO into a state where it can connect to the same host again. BIO_get_fd() places the underlying socket in B if it is not NULL, it also returns the socket . If B is not NULL it should be of type (int *). BIO_set_conn_hostname() uses the string B to set the hostname The hostname can be an IP address. The hostname can also include the port in the form hostname:port . It is also acceptable to use the form "hostname/any/other/path" or "hostname:port/any/other/path". BIO_set_conn_port() sets the port to B. B can be the numerical form or a string such as "http". A string will be looked up first using getservbyname() on the host platform but if that fails a standard table of port names will be used. Currently the list is http, telnet, socks, https, ssl, ftp, gopher and wais. BIO_set_conn_ip() sets the IP address to B using binary form, that is four bytes specifying the IP address in big endian form. BIO_set_conn_int_port() sets the port using B. B should be of type (int *). BIO_get_conn_hostname() returns the hostname of the connect BIO or NULL if the BIO is initialised but no hostname is set. This return value is an internal pointer which should not be modified. BIO_get_conn_port() returns the port as a string. BIO_get_conn_ip() returns the IP address in binary form. BIO_get_conn_int_port() returns the host name as an int. BIO_set_nbio() sets the non blocking I/O flag to B. If B is zero then blocking I/O is set. If B is 1 then non blocking I/O is set. BIO_do_connect() attempts to connect the supplied BIO. It returns 1 if the connection was established successfully. A zero or negative value is returned if the connection could not be established, the call BIO_should_retry() should be used for non blocking connect BIOs to determine if the call should be retried. =head1 NOTES If blocking I/O is set then a non positive return value from any I/O call is caused by an error condition, although a zero return will normally mean that the connection was closed. If the port name is supplied as part of the host name then this will override any value set with BIO_set_conn_port(). The values returned by BIO_get_conn_hostname(), BIO_get_conn_port(), BIO_get_conn_ip() and BIO_get_conn_int_port() are updated when a connection attempt is made. Before any connection attempt the values returned are those set by the application itself. Applications do not have to call BIO_do_connect() but can do so to separate the connection process from other I/O processing. If non blocking I/O is set then retries will be requested as appropriate. It addition to BIO_should_read() and BIO_should_write() it is also possible for BIO_should_io_special() to be true during the initial connection process with the reason BIO_RR_CONNECT. If this is returned then this is an indication that a connection attempt would block, the application should then take appropiate action to wait until the underlying socket has connected and retry the call. =head1 RETURN VALUES BIO_s_connect() returns the connect BIO method. BIO_get_fd() returns the socket or -1 if the BIO has not been initialised. =head1 EXAMPLES TBA =head1 SEE ALSO TBA