test/Makefile: allow emulated test (e.g. under wine).

[openssl.git] / doc / crypto / BIO_s_connect.pod

diff --git a/doc/crypto/BIO_s_connect.pod b/doc/crypto/BIO_s_connect.pod
index 07370ab250739348476df3a37196977a0a83c99b..18ece4c91f66fe45ec10bce81b343d302e73e4ed 100644 (file)
--- a/doc/crypto/BIO_s_connect.pod
+++ b/doc/crypto/BIO_s_connect.pod
@@ -2,7 +2,7 @@
 
 =head1 NAME
 
 
 =head1 NAME
 

-BIO_s_connect, BIO_set_conn_hostname, BIO_set_conn_port,
+BIO_s_connect, BIO_new_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
 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


@@ -13,25 +13,27 @@ BIO_set_nbio, BIO_do_connect - connect BIO
 
  BIO_METHOD * BIO_s_connect(void);
 
 
  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)
+ BIO *BIO_new_connect(char *name);

 
 

- #define BIO_set_nbio(b,n)     BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL)
+ long BIO_set_conn_hostname(BIO *b, char *name);
+ long BIO_set_conn_port(BIO *b, char *port);
+ long BIO_set_conn_ip(BIO *b, char *ip);
+ long BIO_set_conn_int_port(BIO *b, char *port);
+ char *BIO_get_conn_hostname(BIO *b);
+ char *BIO_get_conn_port(BIO *b);
+ char *BIO_get_conn_ip(BIO *b, dummy);
+ long BIO_get_conn_int_port(BIO *b, int port);

 
 

- #define BIO_do_connect(b)     BIO_do_handshake(b)
+ long BIO_set_nbio(BIO *b, long n);
+
+ int BIO_do_connect(BIO *b);

 
 =head1 DESCRIPTION
 
 BIO_s_connect() returns the connect BIO method. This is a wrapper
 round the platform's TCP/IP socket connection routines.
 
 
 =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
+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.
 
 transferred using only BIO routines. In this way any platform
 specific operations are hidden by the BIO abstraction.
 


@@ -54,7 +56,7 @@ BIO_get_fd() places the underlying socket in B<c> if it is not NULL,
 it also returns the socket . If B<c> is not NULL it should be of
 type (int *).
 
 it also returns the socket . If B<c> is not NULL it should be of
 type (int *).
 

-BIO_set_conn_hostname() uses the string B<name> to set the hostname
+BIO_set_conn_hostname() uses the string B<name> 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".
 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".


@@ -66,24 +68,29 @@ 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<ip> using binary form,
 list is http, telnet, socks, https, ssl, ftp, gopher and wais.
 
 BIO_set_conn_ip() sets the IP address to B<ip> using binary form,

-that is four bytes specifying the IP address in big endian form.
+that is four bytes specifying the IP address in big-endian form.

 
 BIO_set_conn_int_port() sets the port using B<port>. B<port> should
 be of type (int *).
 
 BIO_get_conn_hostname() returns the hostname of the connect BIO or
 
 BIO_set_conn_int_port() sets the port using B<port>. B<port> 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.
+NULL if the BIO is initialized 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.
 
 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_get_conn_int_port() returns the port as an int.

 
 BIO_set_nbio() sets the non blocking I/O flag to B<n>. If B<n> is
 zero then blocking I/O is set. If B<n> is 1 then non blocking I/O
 
 BIO_set_nbio() sets the non blocking I/O flag to B<n>. If B<n> is
 zero then blocking I/O is set. If B<n> is 1 then non blocking I/O

-is set.
+is set. Blocking I/O is the default. The call to BIO_set_nbio()
+should be made before the connection is established because 
+non blocking I/O is set during the connect process.
+
+BIO_new_connect() combines BIO_new() and BIO_set_conn_hostname() into
+a single call: that is it creates a new connect BIO with B<name>.

 
 BIO_do_connect() attempts to connect the supplied BIO. It returns 1
 if the connection was established successfully. A zero or negative
 
 BIO_do_connect() attempts to connect the supplied BIO. It returns 1
 if the connection was established successfully. A zero or negative


@@ -91,7 +98,6 @@ 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.
 
 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
 =head1 NOTES
 
 If blocking I/O is set then a non positive return value from any


@@ -99,15 +105,19 @@ 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
 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().
+override any value set with BIO_set_conn_port(). This may be undesirable
+if the application does not wish to allow connection to arbitrary
+ports. This can be avoided by checking for the presence of the ':'
+character in the passed hostname and either indicating an error or
+truncating the string at that point.

 
 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.
 
 
 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.
+Applications do not have to call BIO_do_connect() but may wish to 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.
 
 
 If non blocking I/O is set then retries will be requested as appropriate.
 


@@ -115,19 +125,67 @@ 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,
 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 application should then take appropriate action to wait until

 the underlying socket has connected and retry the call.
 
 the underlying socket has connected and retry the call.
 

+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() and
+BIO_do_connect() are macros.
+

 =head1 RETURN VALUES
 
 BIO_s_connect() returns the connect BIO method.
 
 BIO_get_fd() returns the socket or -1 if the BIO has not
 =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.
+been initialized.

 
 

-=head1 EXAMPLES
+BIO_set_conn_hostname(), BIO_set_conn_port(), BIO_set_conn_ip() and
+BIO_set_conn_int_port() always return 1.
+
+BIO_get_conn_hostname() returns the connected hostname or NULL is
+none was set.
+
+BIO_get_conn_port() returns a string representing the connected
+port or NULL if not set.
+
+BIO_get_conn_ip() returns a pointer to the connected IP address in
+binary form or all zeros if not set.
+
+BIO_get_conn_int_port() returns the connected port or 0 if none was
+set.
+
+BIO_set_nbio() always returns 1.
+
+BIO_do_connect() returns 1 if the connection was successfully
+established and 0 or -1 if the connection failed.
+
+=head1 EXAMPLE
+
+This is example connects to a webserver on the local host and attempts
+to retrieve a page and copy the result to standard output.
+
+
+ BIO *cbio, *out;
+ int len;
+ char tmpbuf[1024];
+ ERR_load_crypto_strings();
+ cbio = BIO_new_connect("localhost:http");
+ out = BIO_new_fp(stdout, BIO_NOCLOSE);
+ if(BIO_do_connect(cbio) <= 0) {
+       fprintf(stderr, "Error connecting to server\n");
+       ERR_print_errors_fp(stderr);
+       /* whatever ... */
+       }
+ BIO_puts(cbio, "GET / HTTP/1.0\n\n");
+ for(;;) {     
+       len = BIO_read(cbio, tmpbuf, 1024);
+       if(len <= 0) break;
+       BIO_write(out, tmpbuf, len);
+ }
+ BIO_free(cbio);
+ BIO_free(out);

 
 

-TBA

 
 =head1 SEE ALSO
 
 
 =head1 SEE ALSO