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Diffstat (limited to 'secure/lib/libcrypto/man/BIO_s_connect.3')
| -rw-r--r-- | secure/lib/libcrypto/man/BIO_s_connect.3 | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/BIO_s_connect.3 b/secure/lib/libcrypto/man/BIO_s_connect.3 new file mode 100644 index 0000000..fea15cb --- /dev/null +++ b/secure/lib/libcrypto/man/BIO_s_connect.3 @@ -0,0 +1,321 @@ +.\" Automatically generated by Pod::Man version 1.15 +.\" Thu May 9 13:15:55 2002 +.\" +.\" Standard preamble: +.\" ====================================================================== +.de Sh \" Subsection heading +.br +.if t .Sp +.ne 5 +.PP +\fB\\$1\fR +.PP +.. +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Ip \" List item +.br +.ie \\n(.$>=3 .ne \\$3 +.el .ne 3 +.IP "\\$1" \\$2 +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R + +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. | will give a +.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used +.\" to do unbreakable dashes and therefore won't be available. \*(C` and +.\" \*(C' expand to `' in nroff, nothing in troff, for use with C<> +.tr \(*W-|\(bv\*(Tr +.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' +.ie n \{\ +. ds -- \(*W- +. ds PI pi +. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch +. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch +. ds L" "" +. ds R" "" +. ds C` "" +. ds C' "" +'br\} +.el\{\ +. ds -- \|\(em\| +. ds PI \(*p +. ds L" `` +. ds R" '' +'br\} +.\" +.\" If the F register is turned on, we'll generate index entries on stderr +.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and +.\" index entries marked with X<> in POD. Of course, you'll have to process +.\" the output yourself in some meaningful fashion. +.if \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. nr % 0 +. rr F +.\} +.\" +.\" For nroff, turn off justification. Always turn off hyphenation; it +.\" makes way too many mistakes in technical documents. +.hy 0 +.if n .na +.\" +.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). +.\" Fear. Run. Save yourself. 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This is a wrapper +round the platform's \s-1TCP/IP\s0 socket connection routines. +.PP +Using connect BIOs \s-1TCP/IP\s0 connections can be made and data +transferred using only \s-1BIO\s0 routines. In this way any platform +specific operations are hidden by the \s-1BIO\s0 abstraction. +.PP +Read and write operations on a connect \s-1BIO\s0 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. +.PP +Connect BIOs support \fIBIO_puts()\fR but not \fIBIO_gets()\fR. +.PP +If the close flag is set on a connect \s-1BIO\s0 then any active +connection is shutdown and the socket closed when the \s-1BIO\s0 +is freed. +.PP +Calling \fIBIO_reset()\fR on a connect \s-1BIO\s0 will close any active +connection and reset the \s-1BIO\s0 into a state where it can connect +to the same host again. +.PP +\&\fIBIO_get_fd()\fR places the underlying socket in \fBc\fR if it is not \s-1NULL\s0, +it also returns the socket . If \fBc\fR is not \s-1NULL\s0 it should be of +type (int *). +.PP +\&\fIBIO_set_conn_hostname()\fR uses the string \fBname\fR to set the hostname +The hostname can be an \s-1IP\s0 address. The hostname can also include the +port in the form hostname:port . It is also acceptable to use the +form \*(L"hostname/any/other/path\*(R" or \*(L"hostname:port/any/other/path\*(R". +.PP +\&\fIBIO_set_conn_port()\fR sets the port to \fBport\fR. \fBport\fR can be the +numerical form or a string such as \*(L"http\*(R". A string will be looked +up first using \fIgetservbyname()\fR 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. +.PP +\&\fIBIO_set_conn_ip()\fR sets the \s-1IP\s0 address to \fBip\fR using binary form, +that is four bytes specifying the \s-1IP\s0 address in big-endian form. +.PP +\&\fIBIO_set_conn_int_port()\fR sets the port using \fBport\fR. \fBport\fR should +be of type (int *). +.PP +\&\fIBIO_get_conn_hostname()\fR returns the hostname of the connect \s-1BIO\s0 or +\&\s-1NULL\s0 if the \s-1BIO\s0 is initialized but no hostname is set. +This return value is an internal pointer which should not be modified. +.PP +\&\fIBIO_get_conn_port()\fR returns the port as a string. +.PP +\&\fIBIO_get_conn_ip()\fR returns the \s-1IP\s0 address in binary form. +.PP +\&\fIBIO_get_conn_int_port()\fR returns the port as an int. +.PP +\&\fIBIO_set_nbio()\fR sets the non blocking I/O flag to \fBn\fR. If \fBn\fR is +zero then blocking I/O is set. If \fBn\fR is 1 then non blocking I/O +is set. Blocking I/O is the default. The call to \fIBIO_set_nbio()\fR +should be made before the connection is established because +non blocking I/O is set during the connect process. +.PP +\&\fIBIO_do_connect()\fR attempts to connect the supplied \s-1BIO\s0. 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 \fIBIO_should_retry()\fR should be used for non blocking connect BIOs +to determine if the call should be retried. +.SH "NOTES" +.IX Header "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. +.PP +If the port name is supplied as part of the host name then this will +override any value set with \fIBIO_set_conn_port()\fR. 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. +.PP +The values returned by \fIBIO_get_conn_hostname()\fR, \fIBIO_get_conn_port()\fR, +\&\fIBIO_get_conn_ip()\fR and \fIBIO_get_conn_int_port()\fR are updated when a +connection attempt is made. Before any connection attempt the values +returned are those set by the application itself. +.PP +Applications do not have to call \fIBIO_do_connect()\fR but may wish to do +so to separate the connection process from other I/O processing. +.PP +If non blocking I/O is set then retries will be requested as appropriate. +.PP +It addition to \fIBIO_should_read()\fR and \fIBIO_should_write()\fR it is also +possible for \fIBIO_should_io_special()\fR to be true during the initial +connection process with the reason \s-1BIO_RR_CONNECT\s0. If this is returned +then this is an indication that a connection attempt would block, +the application should then take appropriate action to wait until +the underlying socket has connected and retry the call. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIBIO_s_connect()\fR returns the connect \s-1BIO\s0 method. +.PP +\&\fIBIO_get_fd()\fR returns the socket or \-1 if the \s-1BIO\s0 has not +been initialized. +.PP +\&\fIBIO_set_conn_hostname()\fR, \fIBIO_set_conn_port()\fR, \fIBIO_set_conn_ip()\fR and +\&\fIBIO_set_conn_int_port()\fR always return 1. +.PP +\&\fIBIO_get_conn_hostname()\fR returns the connected hostname or \s-1NULL\s0 is +none was set. +.PP +\&\fIBIO_get_conn_port()\fR returns a string representing the connected +port or \s-1NULL\s0 if not set. +.PP +\&\fIBIO_get_conn_ip()\fR returns a pointer to the connected \s-1IP\s0 address in +binary form or all zeros if not set. +.PP +\&\fIBIO_get_conn_int_port()\fR returns the connected port or 0 if none was +set. +.PP +\&\fIBIO_set_nbio()\fR always returns 1. +.PP +\&\fIBIO_do_connect()\fR returns 1 if the connection was successfully +established and 0 or \-1 if the connection failed. +.SH "EXAMPLE" +.IX Header "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. +.PP +.Vb 19 +\& 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\en"); +\& ERR_print_errors_fp(stderr); +\& /* whatever ... */ +\& } +\& BIO_puts(cbio, "GET / HTTP/1.0\en\en"); +\& for(;;) { +\& len = BIO_read(cbio, tmpbuf, 1024); +\& if(len <= 0) break; +\& BIO_write(out, tmpbuf, len); +\& } +\& BIO_free(cbio); +\& BIO_free(out); +.Ve +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\s-1TBA\s0 |
