lib: introduce Curl_peer

`struct Curl_peer` keeps information about a communication endpoint
together. It will replace `conn->host` and `conn->conn_to_host` and
proxyinfo host. It will also become part of `struct ssl_peer`.

It has a reference counter, so an instance can be shared between
connections and filters.

Elminiates `conn->host` and `conn->connect_to_host`, used in the
proxyinfo structures. Passed to DNS resolution and socks filters, etc.

Pass peer to http proxy and socks tunnel filters. Use peer in dns filter
and resolving. Make `Curl_peer` a member in the `struct ssl_peer`.

Add `docs/internals/PEERS.md` for documentation.

Closes #21472
This commit is contained in:
Stefan Eissing 2026-05-05 12:58:22 +02:00 committed by Daniel Stenberg
parent 9c9a4f3eab
commit bc40e09f63
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67 changed files with 1902 additions and 1295 deletions

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@ -1549,7 +1549,7 @@ static void cf_socket_update_data(struct Curl_cfilter *cf,
struct cf_socket_ctx *ctx = cf->ctx;
data->info.primary = ctx->ip;
/* not sure if this is redundant... */
data->info.conn_remote_port = cf->conn->remote_port;
data->info.conn_remote_port = cf->conn->origin->port;
}
}