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author | Johannes Schindelin <johannes.schindelin@gmx.de> | 2017-07-07 11:49:08 +0200 |
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committer | Daniel Stenberg <daniel@haxx.se> | 2017-08-28 14:56:59 +0200 |
commit | 1328f69d53f2f2e937696ea954c480412b018451 (patch) | |
tree | 289545b26293a9a261e768cc6d1192d7e7b042c1 /docs/CODE_STYLE.md | |
parent | b59288f88146b64ac5fda296675c523df11658b8 (diff) |
vtls: introduce curl_global_sslset()
Let's add a compile time safe API to select an SSL backend. This
function needs to be called *before* curl_global_init(), and can be
called only once.
Side note: we do not explicitly test that it is called before
curl_global_init(), but we do verify that it is not called multiple times
(even implicitly).
If SSL is used before the function was called, it will use whatever the
CURL_SSL_BACKEND environment variable says (or default to the first
available SSL backend), and if a subsequent call to
curl_global_sslset() disagrees with the previous choice, it will fail
with CURLSSLSET_TOO_LATE.
The function also accepts an "avail" parameter to point to a (read-only)
NULL-terminated list of available backends. This comes in real handy if
an application wants to let the user choose between whatever SSL backends
the currently available libcurl has to offer: simply call
curl_global_sslset(-1, NULL, &avail);
which will return CURLSSLSET_UNKNOWN_BACKEND and populate the avail
variable to point to the relevant information to present to the user.
Just like with the HTTP/2 push functions, we have to add the function
declaration of curl_global_sslset() function to the header file
*multi.h* because VMS and OS/400 require a stable order of functions
declared in include/curl/*.h (where the header files are sorted
alphabetically). This looks a bit funny, but it cannot be helped.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Diffstat (limited to 'docs/CODE_STYLE.md')
0 files changed, 0 insertions, 0 deletions