lib: transfer origin and proxy handling

Add `data->state.origin` as the origin the transfer is sending the
current request to/gets the response from. Use it for request specific
properties like authentication, hsts and cookie handling, etc.

Unless talking to a forwarding HTTP proxy (e.g. not tunneling),
`data->state.origin` and `conn->origin` are the same.

With a forwarding HTTP proxy in play, `conn->origin` is set to
`conn->http_proxy.peer` and `conn->bits.origin_is_proxy` (a new bit) is
set.

Remove the connection bits, now replaced with:

* `conn->bits.socksproxy` -> `conn->socks_proy.peer`
* `conn->bits.httpproxy` -> `conn->http_proy.peer`
* `conn->bits.proxy` -> `(conn->socks_proy.peer || conn->http_proy.peer`)
* `conn->bits.tunnel_proxy` -> (`conn->http_proy.peer && !conn->bits.origin_is_proxy`)
* `(conn->bits.httpproxy && !conn->bits.tunnel_proxy)` -> `conn->bits.origin_is_proxy`

Rename `noproxy.[ch]` to `proxy.[ch]`. Move the connection proxy setup
code from `url.c` to `proxy.c`.

Remove `data->info.conn_remote_port` as no one uses it.

Add test_40_02b for a SOCKS connection to a forwarding HTTPS proxy.

Update internal documentation about peers and creds.

Closes #21967
This commit is contained in:
Stefan Eissing 2026-06-12 12:02:08 +02:00 committed by Daniel Stenberg
parent c951368579
commit 73daec6620
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GPG key ID: 5CC908FDB71E12C2
30 changed files with 1083 additions and 1014 deletions

View file

@ -660,6 +660,31 @@ bool Curl_conn_is_ip_connected(struct Curl_easy *data, int sockindex)
return FALSE;
}
#ifndef CURL_DISABLE_PROXY
static bool cf_is_tunneling(struct Curl_cfilter *cf)
{
for(; cf; cf = cf->next) {
if((cf->cft->flags & CF_TYPE_PROXY))
return TRUE;
}
return FALSE;
}
bool Curl_conn_is_tunneling(struct connectdata *conn, int sockindex)
{
if(!CONN_SOCK_IDX_VALID(sockindex))
return FALSE;
return conn ? cf_is_tunneling(conn->cfilter[sockindex]) : FALSE;
}
#else
bool Curl_conn_is_tunneling(struct connectdata *conn, int sockindex)
{
(void)conn;
(void)sockindex;
return FALSE;
}
#endif /* CURL_DISABLE_PROXY */
static bool cf_is_ssl(struct Curl_cfilter *cf)
{
for(; cf; cf = cf->next) {