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Use server.current_client to decide whether cluster commands should return TLS info. (#12569)

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Starting a change in #12233 (released in 7.2), CLUSTER commands use client's
connection to decide whether to return TLS port or non-TLS port, but commands
called by Lua script and module's RM_Call don't have a real client with connection,
and would currently be regarded as non-TLS connections.

We can use server.current_client instead when it is available. When it is not (module calls
commands without a real client), we may see this as an undefined behavior, and return null
or default port (currently in this PR it returns default port, judged by server.tls_cluster).
This commit is contained in:
Chen Tianjie 2023-09-21 23:41:32 +08:00 committed by GitHub
parent 4031a18732
commit 2aad03fa39
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 4 deletions
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22
src/cluster.c
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@ -119,6 +119,20 @@ static inline int defaultClientPort(void) {
return server.tls_cluster ? server.tls_port : server.port;
}
/* When a cluster command is called, we need to decide whether to return TLS info or
* non-TLS info by the client's connection type. However if the command is called by
* a Lua script or RM_call, there is no connection in the fake client, so we use
* server.current_client here to get the real client if available. And if it is not
* available (modules may call commands without a real client), we return the default
* info, which is determined by server.tls_cluster. */
static int shouldReturnTlsInfo(void) {
if (server.current_client && server.current_client->conn) {
return connIsTLS(server.current_client->conn);
} else {
return server.tls_cluster;
}
}
/* Links to the next and previous entries for keys in the same slot are stored
* in the dict entry metadata. See Slot to Key API below. */
#define dictEntryNextInSlot(de) \
@ -5570,7 +5584,7 @@ void addNodeToNodeReply(client *c, clusterNode *node) {
}
/* Report TLS ports to TLS client, and report non-TLS port to non-TLS client. */
addReplyLongLong(c, getNodeClientPort(node, connIsTLS(c->conn)));
addReplyLongLong(c, getNodeClientPort(node, shouldReturnTlsInfo()));
addReplyBulkCBuffer(c, node->name, CLUSTER_NAMELEN);
/* Add the additional endpoint information, this is all the known networking information
@ -5946,7 +5960,7 @@ NULL
} else if (!strcasecmp(c->argv[1]->ptr,"nodes") && c->argc == 2) {
/* CLUSTER NODES */
/* Report TLS ports to TLS client, and report non-TLS port to non-TLS client. */
sds nodes = clusterGenNodesDescription(c, 0, connIsTLS(c->conn));
sds nodes = clusterGenNodesDescription(c, 0, shouldReturnTlsInfo());
addReplyVerbatim(c,nodes,sdslen(nodes),"txt");
sdsfree(nodes);
} else if (!strcasecmp(c->argv[1]->ptr,"myid") && c->argc == 2) {
@ -6312,7 +6326,7 @@ NULL
/* Report TLS ports to TLS client, and report non-TLS port to non-TLS client. */
addReplyArrayLen(c,n->numslaves);
for (j = 0; j < n->numslaves; j++) {
sds ni = clusterGenNodeDescription(c, n->slaves[j], connIsTLS(c->conn));
sds ni = clusterGenNodeDescription(c, n->slaves[j], shouldReturnTlsInfo());
addReplyBulkCString(c,ni);
sdsfree(ni);
}
@ -7438,7 +7452,7 @@ void clusterRedirectClient(client *c, clusterNode *n, int hashslot, int error_co
error_code == CLUSTER_REDIR_ASK)
{
/* Report TLS ports to TLS client, and report non-TLS port to non-TLS client. */
int port = getNodeClientPort(n, connIsTLS(c->conn));
int port = getNodeClientPort(n, shouldReturnTlsInfo());
addReplyErrorSds(c,sdscatprintf(sdsempty(),
"-%s %d %s:%d",
(error_code == CLUSTER_REDIR_ASK) ? "ASK" : "MOVED",