net/rxrpc/security.c

Source file repositories/reference/linux-study-clean/net/rxrpc/security.c

File Facts

System
Linux kernel
Corpus path
net/rxrpc/security.c
Extension
.c
Size
4641 bytes
Lines
211
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

if (rxrpc_security_types[i]) {
			ret = rxrpc_security_types[i]->init();
			if (ret < 0)
				goto failed;
		}
	}

	return 0;

failed:
	for (i--; i >= 0; i--)
		if (rxrpc_security_types[i])
			rxrpc_security_types[i]->exit();
	return ret;
}

void rxrpc_exit_security(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++)
		if (rxrpc_security_types[i])
			rxrpc_security_types[i]->exit();
}

/*
 * look up an rxrpc security module
 */
const struct rxrpc_security *rxrpc_security_lookup(u8 security_index)
{
	if (security_index >= ARRAY_SIZE(rxrpc_security_types))
		return NULL;
	return rxrpc_security_types[security_index];
}

/*
 * Initialise the security on a client call.
 */
int rxrpc_init_client_call_security(struct rxrpc_call *call)
{
	const struct rxrpc_security *sec = &rxrpc_no_security;
	struct rxrpc_key_token *token;
	struct key *key = call->key;
	int ret;

	if (!key)
		goto found;

	ret = key_validate(key);
	if (ret < 0)
		return ret;

	for (token = key->payload.data[0]; token; token = token->next) {
		sec = rxrpc_security_lookup(token->security_index);
		if (sec)
			goto found;
	}
	return -EKEYREJECTED;

found:
	call->security = sec;
	call->security_ix = sec->security_index;
	return 0;
}

/*
 * initialise the security on a client connection
 */
int rxrpc_init_client_conn_security(struct rxrpc_connection *conn)
{
	struct rxrpc_key_token *token;
	struct key *key = conn->key;
	int ret = 0;

	_enter("{%d},{%x}", conn->debug_id, key_serial(key));

	for (token = key->payload.data[0]; token; token = token->next) {
		if (token->security_index == conn->security->security_index)
			goto found;
	}
	return -EKEYREJECTED;

found:
	mutex_lock(&conn->security_lock);
	if (conn->state == RXRPC_CONN_CLIENT_UNSECURED) {
		ret = conn->security->init_connection_security(conn, token);
		if (ret == 0) {
			spin_lock_irq(&conn->state_lock);
			if (conn->state == RXRPC_CONN_CLIENT_UNSECURED)
				conn->state = RXRPC_CONN_CLIENT;

Annotation

Implementation Notes