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conncache: make "bundles" per host name when doing proxy tunnels

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Only HTTP proxy use where multiple host names can be used over the same
connection should use the proxy host name for bundles.

Reported-by: Tom van der Woerdt
Fixes #3951
Closes #3955
This commit is contained in:
Daniel Stenberg 2019-05-28 12:14:51 +02:00
parent 8581e1928e
commit 2f11fbf208
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
3 changed files with 23 additions and 17 deletions
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20
lib/conncache.c
View File

@ -159,19 +159,22 @@ void Curl_conncache_destroy(struct conncache *connc)
/* creates a key to find a bundle for this connection */
static void hashkey(struct connectdata *conn, char *buf,
size_t len) /* something like 128 is fine */
size_t len, /* something like 128 is fine */
const char **hostp)
{
const char *hostname;
if(conn->bits.socksproxy)
hostname = conn->socks_proxy.host.name;
else if(conn->bits.httpproxy)
if(conn->bits.httpproxy && !conn->bits.tunnel_proxy)
hostname = conn->http_proxy.host.name;
else if(conn->bits.conn_to_host)
hostname = conn->conn_to_host.name;
else
hostname = conn->host.name;
if(hostp)
/* report back which name we used */
*hostp = hostname;
DEBUGASSERT(len > 32);
/* put the number first so that the hostname gets cut off if too long */
@ -212,13 +215,14 @@ size_t Curl_conncache_bundle_size(struct connectdata *conn)
**NOTE**: When it returns, it holds the connection cache lock! */
struct connectbundle *Curl_conncache_find_bundle(struct connectdata *conn,
struct conncache *connc)
struct conncache *connc,
const char **hostp)
{
struct connectbundle *bundle = NULL;
CONN_LOCK(conn->data);
if(connc) {
char key[128];
hashkey(conn, key, sizeof(key));
hashkey(conn, key, sizeof(key), hostp);
bundle = Curl_hash_pick(&connc->hash, key, strlen(key));
}
@ -267,7 +271,7 @@ CURLcode Curl_conncache_add_conn(struct conncache *connc,
struct Curl_easy *data = conn->data;
/* *find_bundle() locks the connection cache */
bundle = Curl_conncache_find_bundle(conn, data->state.conn_cache);
bundle = Curl_conncache_find_bundle(conn, data->state.conn_cache, NULL);
if(!bundle) {
int rc;
char key[128];
@ -277,7 +281,7 @@ CURLcode Curl_conncache_add_conn(struct conncache *connc,
goto unlock;
}
hashkey(conn, key, sizeof(key));
hashkey(conn, key, sizeof(key), NULL);
rc = conncache_add_bundle(data->state.conn_cache, key, new_bundle);
if(!rc) {

3
lib/conncache.h
View File

@ -54,7 +54,8 @@ void Curl_conncache_destroy(struct conncache *connc);
/* return the correct bundle, to a host or a proxy */
struct connectbundle *Curl_conncache_find_bundle(struct connectdata *conn,
struct conncache *connc);
struct conncache *connc,
const char **hostp);
void Curl_conncache_unlock(struct Curl_easy *data);
/* returns number of connections currently held in the connection cache */
size_t Curl_conncache_size(struct Curl_easy *data);

17
lib/url.c
View File

@ -1006,6 +1006,7 @@ ConnectionExists(struct Curl_easy *data,
bool canmultiplex = IsMultiplexingPossible(data, needle);
struct connectbundle *bundle;
struct curltime now = Curl_now();
const char *hostbundle;
#ifdef USE_NTLM
bool wantNTLMhttp = ((data->state.authhost.want &
@ -1022,16 +1023,15 @@ ConnectionExists(struct Curl_easy *data,
/* Look up the bundle with all the connections to this particular host.
Locks the connection cache, beware of early returns! */
bundle = Curl_conncache_find_bundle(needle, data->state.conn_cache);
bundle = Curl_conncache_find_bundle(needle, data->state.conn_cache,
&hostbundle);
if(bundle) {
/* Max pipe length is zero (unlimited) for multiplexed connections */
struct curl_llist_element *curr;
infof(data, "Found bundle for host %s: %p [%s]\n",
(needle->bits.conn_to_host ? needle->conn_to_host.name :
needle->host.name), (void *)bundle,
(bundle->multiuse == BUNDLE_MULTIPLEX ?
"can multiplex" : "serially"));
hostbundle, (void *)bundle, (bundle->multiuse == BUNDLE_MULTIPLEX ?
"can multiplex" : "serially"));
/* We can't multiplex if we don't know anything about the server */
if(canmultiplex) {
@ -3762,8 +3762,9 @@ static CURLcode create_conn(struct Curl_easy *data,
connections_available = FALSE;
else {
/* this gets a lock on the conncache */
const char *bundlehost;
struct connectbundle *bundle =
Curl_conncache_find_bundle(conn, data->state.conn_cache);
Curl_conncache_find_bundle(conn, data->state.conn_cache, &bundlehost);
if(max_host_connections > 0 && bundle &&
(bundle->num_connections >= max_host_connections)) {
@ -3777,8 +3778,8 @@ static CURLcode create_conn(struct Curl_easy *data,
(void)Curl_disconnect(data, conn_candidate,
/* dead_connection */ FALSE);
else {
infof(data, "No more connections allowed to host: %zu\n",
max_host_connections);
infof(data, "No more connections allowed to host %s: %zu\n",
bundlehost, max_host_connections);
connections_available = FALSE;
}
}