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lib: introduce Curl_peer

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`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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8
lib/http2.c
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@ -1438,14 +1438,14 @@ static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
!strncmp(HTTP_PSEUDO_AUTHORITY, (const char *)name, namelen)) {
/* pseudo headers are lower case */
int rc = 0;
char *check = curl_maprintf("%s:%d", cf->conn->host.name,
cf->conn->remote_port);
char *check = curl_maprintf("%s:%d", cf->conn->origin->hostname,
cf->conn->origin->port);
if(!check)
/* no memory */
return NGHTTP2_ERR_CALLBACK_FAILURE;
if(!curl_strequal(check, (const char *)value) &&
((cf->conn->remote_port != cf->conn->given->defport) ||
!curl_strequal(cf->conn->host.name, (const char *)value))) {
((cf->conn->origin->port != cf->conn->given->defport) ||
!curl_strequal(cf->conn->origin->hostname, (const char *)value))) {
/* This is push is not for the same authority that was asked for in
* the URL. RFC 7540 section 8.2 says: "A client MUST treat a
* PUSH_PROMISE for which the server is not authoritative as a stream