Until now we took the approach if just writing the close notification
broke something, we didn't care because we were closing the connection
anyway.
But with lws_meta, breaking stuff in the parent connection would be a
sticky problem outliving the closing child connection.
So this adds a new wsi state LWSS_WAITING_TO_SEND_CLOSE_NOTIFICATION
and makes the send go via the writable callback mechanism.
Adds a new api lws_vhost_destroy(struct lws_vhost *) which allows dynamic removal of vhosts.
The external api calls two parts of internal helpers that get reused for context destroy.
The second part is called deferred by 5s... this is to ensure that event library objects
composed into structs owned by the vhost all have a chance to complete their close
asynchronously. That should happen immediately, but it requires us to return to the
event loop first.
The vhost being removed is deleted from the context vhost list by the first part, and does
not block further removals or creation during the delay for the deferred freeing of the
vhost memory.
Part 1:
- if the vhost owned a listen socket needed by other vhosts listening on same iface + port, the listen
socket is first handed off to another vhost so it stays alive
- all wsi still open on the vhost are forcibly closed (including any listen socket still attached)
- inform all active protocols on the vhost they should destroy themselves
- remove vhost from context vhost list (can no longer be found by incoming connections)
- add to a "being destroyed" context list and schedule the second part to be called in 5s
Part 2:
- remove us from the being destroyed list
- free all allocations owned by the vhost
- zero down the vhost and free the vhost itself
In libwebsockets-test-server, you can send it a SIGUSR1 to have it toggle the creation and destruction of
a second vhost on port + 1.
AG: move new member to end of info,
allow info member even on nonsupporting platform,
document requires root,
apply only to listen skt before we drop root,
add -k to test server to allow testing
Use LWS_INLINE instead of inline in libwebsockets.h to
make it compatible on both Linux and Windows.
Signed-off-by: Andy Ning <andy.ning@windriver.com>
AG:
- move creation info members to end of struct
- add LWS_WITH_SOCKS5 CMake var, defaults to OFF
- cast away some warnings about signed / unsigned in strncpy
Signed-off-by: Andy Ning <andy.ning@windriver.com>
Also introduce CMake LWS_WITH_ZIP_FOPS defaulting to ON that builds junzip.c and
make sure this is exported in lws_config.h (included by libwebsockets.h)
Improve lws handling of stdint.h import or simulate it.
- if protocol set, allocate own user_space
If the child wsi wants the parent wsi user_space, it can use
lws_wsi_user(lws_get_parent(child_wsi))
- raw file close processing handles parent-child relationship
