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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GPG key ID: 5CC908FDB71E12C2
67 changed files with 1902 additions and 1295 deletions

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@ -2551,7 +2551,7 @@ static CURLcode myssh_connect(struct Curl_easy *data, bool *done)
rc = ssh_options_set(sshc->ssh_session, SSH_OPTIONS_HOST,
(data->state.up.hostname[0] == '[') ?
data->state.up.hostname : conn->host.name);
data->state.up.hostname : conn->origin->hostname);
if(rc != SSH_OK) {
failf(data, "Could not set remote host");
@ -2595,9 +2595,9 @@ static CURLcode myssh_connect(struct Curl_easy *data, bool *done)
}
}
if(conn->remote_port) {
if(conn->origin->port) {
rc = ssh_options_set(sshc->ssh_session, SSH_OPTIONS_PORT,
&conn->remote_port);
&conn->origin->port);
if(rc != SSH_OK) {
failf(data, "Could not set remote port");
return CURLE_FAILED_INIT;