Function iredismodule::get_client_info_by_id

pub fn get_client_info_by_id(
    id: u64
) -> Result<&'static RedisModuleClientInfo, Error>

Return information about the client with the specified ID

If the client exists, Ok is returned, otherwise Err is returned.

When the client exist and the ci pointer is not NULL, but points to a structure of type RedisModuleClientInfo, previously initialized with the correct REDISMODULE_CLIENTINFO_INITIALIZER, the structure is populated with the following fields:

 uint64_t flags;         // REDISMODULE_CLIENTINFO_FLAG_*
 uint64_t id;            // Client ID
 char addr[46];          // IPv4 or IPv6 address.
 uint16_t port;          // TCP port.
 uint16_t db;            // Selected DB.

Note: the client ID is useless in the context of this call, since we already know, however the same structure could be used in other contexts where we don't know the client ID, yet the same structure is returned.

With flags having the following meaning:

REDISMODULE_CLIENTINFO_FLAG_SSL          Client using SSL connection.
REDISMODULE_CLIENTINFO_FLAG_PUBSUB       Client in Pub/Sub mode.
REDISMODULE_CLIENTINFO_FLAG_BLOCKED      Client blocked in command.
REDISMODULE_CLIENTINFO_FLAG_TRACKING     Client with keys tracking on.
REDISMODULE_CLIENTINFO_FLAG_UNIXSOCKET   Client using unix domain socket.
REDISMODULE_CLIENTINFO_FLAG_MULTI        Client in MULTI state.

However passing NULL is a way to just check if the client exists in case we are not interested in any additional information.