cf-socket: keep sockaddr local in the socket filters

- copy `struct Curl_addrinfo` on filter setup into context
- remove `struct Curl_addrinfoi *` with `struct Curl_sockaddr_ex *` in
  connectdata that is set and NULLed by the socket filter
- this means we have no reference to the resolver info in connectdata or
  its filters
- trigger the CF_CTRL_CONN_INFO_UPDATE event when the complete filter
  chain reaches connected status
- update easy handle connection information on CF_CTRL_DATA_SETUP event.

Closes #10213

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/cfilters.c b/lib/cfilters.c
index 092f9f1d6..7f524cdb8 100644
--- a/lib/cfilters.c
+++ b/lib/cfilters.c
@@ -369,10 +369,14 @@ CURLcode Curl_conn_connect(struct Curl_easy *data,
 
   cf = data->conn->cfilter[sockindex];
   DEBUGASSERT(cf);
+  if(!cf)
+    return CURLE_FAILED_INIT;
+
   *done = cf->connected;
   if(!*done) {
-    result = cf->cft->connect (cf, data, blocking, done);
+    result = cf->cft->connect(cf, data, blocking, done);
     if(!result && *done) {
+      Curl_conn_ev_update_info(data, data->conn);
       data->conn->keepalive = Curl_now();
     }
   }