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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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GPG key ID: 5CC908FDB71E12C2
67 changed files with 1902 additions and 1295 deletions
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20
lib/vssh/libssh2.c
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@ -361,9 +361,9 @@ static CURLcode ssh_knownhost(struct Curl_easy *data,
rc = CURLKHSTAT_REJECT;
else {
keycheck = libssh2_knownhost_checkp(sshc->kh,
conn->host.name,
(conn->remote_port != PORT_SSH) ?
conn->remote_port : -1,
conn->origin->hostname,
(conn->origin->port != PORT_SSH) ?
conn->origin->port : -1,
remotekey, keylen,
LIBSSH2_KNOWNHOST_TYPE_PLAIN|
LIBSSH2_KNOWNHOST_KEYENC_RAW|
@ -427,14 +427,14 @@ static CURLcode ssh_knownhost(struct Curl_easy *data,
/* the found host+key did not match but has been told to be fine
anyway so we add it in memory */
int addrc = libssh2_knownhost_add(sshc->kh,
conn->host.name, NULL,
conn->origin->hostname, NULL,
remotekey, keylen,
LIBSSH2_KNOWNHOST_TYPE_PLAIN|
LIBSSH2_KNOWNHOST_KEYENC_RAW|
keybit, NULL);
if(addrc)
infof(data, "WARNING: adding the known host %s failed",
conn->host.name);
conn->origin->hostname);
else if(rc == CURLKHSTAT_FINE_ADD_TO_FILE ||
rc == CURLKHSTAT_FINE_REPLACE) {
/* now we write the entire in-memory list of known hosts to the
@ -642,16 +642,16 @@ static CURLcode ssh_force_knownhost_key_type(struct Curl_easy *data,
}
p = kh_name_end + 2; /* start of port number */
if(!curlx_str_number(&p, &port, 0xffff) &&
(kh_name_end && (port == conn->remote_port))) {
(kh_name_end && (port == conn->origin->port))) {
kh_name_size = strlen(store->name) - 1 - strlen(kh_name_end);
if(strncmp(store->name + 1,
conn->host.name, kh_name_size) == 0) {
conn->origin->hostname, kh_name_size) == 0) {
found = TRUE;
break;
}
}
}
else if(strcmp(store->name, conn->host.name) == 0) {
else if(strcmp(store->name, conn->origin->hostname) == 0) {
found = TRUE;
break;
}
@ -667,7 +667,7 @@ static CURLcode ssh_force_knownhost_key_type(struct Curl_easy *data,
int rc;
const char *hostkey_method = NULL;
infof(data, "Found host %s in %s",
conn->host.name, data->set.str[STRING_SSH_KNOWNHOSTS]);
conn->origin->hostname, data->set.str[STRING_SSH_KNOWNHOSTS]);
switch(store->typemask & LIBSSH2_KNOWNHOST_KEY_MASK) {
case LIBSSH2_KNOWNHOST_KEY_ED25519:
@ -710,7 +710,7 @@ static CURLcode ssh_force_knownhost_key_type(struct Curl_easy *data,
}
else {
infof(data, "Did not find host %s in %s",
conn->host.name, data->set.str[STRING_SSH_KNOWNHOSTS]);
conn->origin->hostname, data->set.str[STRING_SSH_KNOWNHOSTS]);
}
}