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lib: transfer origin and proxy handling

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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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30 changed files with 1083 additions and 1014 deletions
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lib/transfer.c
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@ -493,6 +493,7 @@ CURLcode Curl_pretransfer(struct Curl_easy *data)
/* initial transfer request coming up, forget the initial origin
* from a previous perform() on this handle. */
Curl_peer_unlink(&data->state.initial_origin);
Curl_peer_unlink(&data->state.origin);
data->state.requests = 0;
data->state.followlocation = 0; /* reset the location-follow counter */
data->state.this_is_a_follow = FALSE; /* reset this */