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lib: connection filters (cfilter) addition to curl:

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- general construct/destroy in connectdata
 - default implementations of callback functions
 - connect: cfilters for connect and accept
 - socks: cfilter for socks proxying
 - http_proxy: cfilter for http proxy tunneling
 - vtls: cfilters for primary and proxy ssl
 - change in general handling of data/conn
 - Curl_cfilter_setup() sets up filter chain based on data settings,
   if none are installed by the protocol handler setup
 - Curl_cfilter_connect() boot straps filters into `connected` status,
   used by handlers and multi to reach further stages
 - Curl_cfilter_is_connected() to check if a conn is connected,
   e.g. all filters have done their work
 - Curl_cfilter_get_select_socks() gets the sockets and READ/WRITE
   indicators for multi select to work
 - Curl_cfilter_data_pending() asks filters if the have incoming
   data pending for recv
 - Curl_cfilter_recv()/Curl_cfilter_send are the general callbacks
   installed in conn->recv/conn->send for io handling
 - Curl_cfilter_attach_data()/Curl_cfilter_detach_data() inform filters
   and addition/removal of a `data` from their connection
 - adding vtl functions to prevent use of Curl_ssl globals directly
   in other parts of the code.

Reviewed-by: Daniel Stenberg
Closes #9855
This commit is contained in:
Stefan Eissing 2022-11-11 11:45:34 +01:00 • committed by Daniel Stenberg
parent 89ee5cfb38
commit dafdb20a26
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GPG key ID: 5CC908FDB71E12C2
49 changed files with 3325 additions and 1969 deletions
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6
lib/openldap.c
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@ -47,6 +47,7 @@
#include "transfer.h"
#include "curl_ldap.h"
#include "curl_base64.h"
#include "cfilters.h"
#include "connect.h"
#include "curl_sasl.h"
#include "strcase.h"
@ -500,8 +501,7 @@ static CURLcode oldap_ssl_connect(struct Curl_easy *data, ldapstate newstate)
struct ldapconninfo *li = conn->proto.ldapc;
bool ssldone = 0;
result = Curl_ssl_connect_nonblocking(data, conn, FALSE,
FIRSTSOCKET, &ssldone);
result = Curl_cfilter_connect(data, FIRSTSOCKET, FALSE, &ssldone);
if(!result) {
state(data, newstate);
@ -1153,7 +1153,7 @@ ldapsb_tls_ctrl(Sockbuf_IO_Desc *sbiod, int opt, void *arg)
(void)arg;
if(opt == LBER_SB_OPT_DATA_READY) {
struct Curl_easy *data = sbiod->sbiod_pvt;
return Curl_ssl_data_pending(data->conn, FIRSTSOCKET);
return Curl_cfilter_data_pending(data->conn, FIRSTSOCKET);
}
return 0;
}