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Peter Sylvester's CURLOPT_SSL_CTX_FUNCTION docs

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I reworded some of the intial paragraphs to avoid 'NOTE2'
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Daniel Stenberg 2004-01-15 10:38:08 +00:00
parent eabbb5331a
commit 84990cb176
1 changed files with 28 additions and 7 deletions
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35
docs/libcurl/curl_easy_setopt.3
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@ -21,7 +21,7 @@
.\" * $Id$
.\" **************************************************************************
.\"
.TH curl_easy_setopt 3 "7 Jan 2004" "libcurl 7.11.0" "libcurl Manual"
.TH curl_easy_setopt 3 "15 Jan 2004" "libcurl 7.11.0" "libcurl Manual"
.SH NAME
curl_easy_setopt - set options for a curl easy handle
.SH SYNOPSIS
@ -38,18 +38,17 @@ carefully as bad input values may cause libcurl to behave badly! You can only
set one option in each function call. A typical application uses many
curl_easy_setopt() calls in the setup phase.
Options set with this function call are valid for all forthcoming transfers
performed using this \fIhandle\fP. The options are not in any way reset
between transfers, so if you want subsequent transfers with different options,
you must change them between the transfers.
\fBNOTE:\fP strings passed to libcurl as 'char *' arguments, will not be
copied by the library. Instead you should keep them available until libcurl no
longer needs them. Failing to do so will cause very odd behavior or even
crashes. libcurl will need them until you call curl_easy_cleanup() or you set
the same option again to use a different pointer.
\fBNOTE2:\fP options set with this function call are valid for the forthcoming
data transfers that are performed when you invoke \fIcurl_easy_perform\fP.
The options are not in any way reset between transfers, so if you want
subsequent transfers with different options, you must change them between the
transfers.
The \fIhandle\fP is the return code from a \fIcurl_easy_init(3)\fP or
\fIcurl_easy_duphandle(3)\fP call.
.SH BEHAVIOR OPTIONS
@ -186,6 +185,28 @@ The data is protocol data sent to the peer.
Pass a pointer to whatever you want passed in to your
\fICURLOPT_DEBUGFUNCTION\fP in the last void * argument. This pointer is not
used by libcurl, it is only passed to the callback.
.IP CURLOPT_SSL_CTX_FUNCTION
Function pointer that should match the following prototype: \fBCURLcode
sslctxfun(CURL *curl, void *sslctx, void *parm);\fP This function gets called
by libcurl just before the initialization of an SSL connection after having
processed all other SSL related options to give a last chance to an
application to modify the behaviour of openssl's ssl initilaization. The
\fIsslctx\fP parameter is actually a pointer to an openssl \fISSL_CTX\fP. If
an error is returned no attempt to establish a connection is made and the
perform operation will return the error code from this callback function. Set
the \fIparm\fP argument with the \fICURLOPT_SSL_CTX_DATA\fP option. This
option was introduced in 7.11.0.
\fBNOTE:\fP To use this properly, a non-trivial amount of knowledge of the
openssl libraries is necessary. Using this function allows for example to use
openssl callbacks to add additional validation code for certificates, and even
to change the actual URI of an HTTPS request (example used in the lib509 test
case). See also the example section for a replacement of the key, certificate
and trust file settings.
.IP CURLOPT_SSL_CTX_DATA
Data pointer to pass to the ssl context callback set by the option
\fICURLOPT_SSL_CTX_FUNCTION\fP, this is the pointer you'll get as third
parameter, otherwise \fBNULL\fP. (Added in 7.11.0)
.SH ERROR OPTIONS
.IP CURLOPT_ERRORBUFFER
Pass a char * to a buffer that the libcurl may store human readable error