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-rw-r--r--ecp/src/ecp/core.c190
-rw-r--r--ecp/src/ecp/core.h5
-rw-r--r--ecp/src/ecp/timer.c12
3 files changed, 119 insertions, 88 deletions
diff --git a/ecp/src/ecp/core.c b/ecp/src/ecp/core.c
index bb3309c..d111a97 100644
--- a/ecp/src/ecp/core.c
+++ b/ecp/src/ecp/core.c
@@ -928,31 +928,11 @@ int ecp_conn_init_outb(ECPConnection *conn) {
ECPDHKey key;
int rv;
- conn->key_curr = 0;
-
rv = ecp_dhkey_gen(&key);
if (rv) return rv;
- rv = conn_dhkey_new(conn, conn->key_curr, &key);
- if (rv) return rv;
-
- return ECP_OK;
-}
-
-int ecp_conn_reset(ECPConnection *conn) {
- if (conn->flags) return ECP_ERR;
-
- conn->key_curr = ECP_ECDH_IDX_INV;
- conn->key_next = ECP_ECDH_IDX_INV;
- conn->rkey_curr = ECP_ECDH_IDX_INV;
- memset(&conn->key, 0, sizeof(conn->key));
- memset(&conn->rkey, 0, sizeof(conn->rkey));
- memset(&conn->shkey, 0, sizeof(conn->shkey));
- arc4random_buf(&conn->nonce_out, sizeof(conn->nonce_out));
- conn->access_ts = 0;
- conn->keyx_ts = 0;
- conn->nonce_in = 0;
- conn->nonce_map = 0;
+ conn->key_curr = 0;
+ conn->key[conn->key_curr] = key;
return ECP_OK;
}
@@ -1066,30 +1046,6 @@ int ecp_conn_create_outb(ECPConnection *conn, ECPConnection *parent, ECPNode *no
return ECP_OK;
}
-int ecp_conn_reset_outb(ECPConnection *conn) {
- int rv = ECP_OK;
-
- ecp_conn_remove(conn);
-
-#ifdef ECP_WITH_PTHREAD
- pthread_mutex_lock(&conn->mutex);
-#endif
-
- if (_ecp_conn_is_open(conn)) rv = ECP_ERR;
- if (!rv) rv = ecp_conn_reset(conn);
- if (!rv) rv = ecp_conn_init_outb(conn);
-
-#ifdef ECP_WITH_PTHREAD
- pthread_mutex_unlock(&conn->mutex);
-#endif
- if (rv) return rv;
-
- rv = ecp_conn_insert(conn);
- if (rv) return rv;
-
- return ECP_OK;
-}
-
void ecp_conn_destroy(ECPConnection *conn) {
#ifdef ECP_WITH_VCONN
if (conn->parent) {
@@ -1171,6 +1127,30 @@ int ecp_conn_insert_gc(ECPConnection *conn) {
return rv;
}
+int _ecp_conn_remove(ECPConnection *conn) {
+ ECPSocket *sock = conn->sock;
+ int rv = ECP_OK;
+
+#ifdef ECP_WITH_PTHREAD
+ pthread_mutex_lock(&sock->conn_table.mutex);
+ pthread_mutex_lock(&conn->mutex);
+#endif
+
+ if (!_ecp_conn_is_reg(conn)) rv = ECP_ERR_CLOSED;
+ if (!rv && _ecp_conn_is_open(conn)) rv = ECP_ERR_BUSY;
+ if (!rv) {
+ conn_table_remove(conn);
+ _ecp_conn_clr_reg(conn);
+ }
+
+#ifdef ECP_WITH_PTHREAD
+ pthread_mutex_unlock(&conn->mutex);
+ pthread_mutex_unlock(&sock->conn_table.mutex);
+#endif
+
+ return rv;
+}
+
void ecp_conn_remove(ECPConnection *conn) {
ECPSocket *sock = conn->sock;
@@ -1268,15 +1248,6 @@ int _ecp_conn_open(ECPConnection *conn, ECPConnection *parent, ECPNode *node, in
return rv;
}
-int _ecp_conn_reopen(ECPConnection *conn, int retry) {
- int rv;
-
- rv = ecp_conn_reset_outb(conn);
- if (rv) return rv;
-
- return ecp_send_init_req(conn, retry);
-}
-
int ecp_conn_open(ECPConnection *conn, ECPNode *node) {
int rv;
@@ -1291,13 +1262,6 @@ int ecp_conn_try_open(ECPConnection *conn, ECPNode *node) {
return rv;
}
-int ecp_conn_reopen(ECPConnection *conn) {
- int rv;
-
- rv = _ecp_conn_reopen(conn, 1);
- return rv;
-}
-
void _ecp_conn_close(ECPConnection *conn) {
if (_ecp_conn_is_open(conn)) {
ecp_close_handler_t handler;
@@ -1618,6 +1582,7 @@ void ecp_err_handle(ECPConnection *conn, unsigned char mtype, int err) {
rv = ecp_ext_err_handle(conn, mtype, err);
if (rv != ECP_PASS) return;
+ if (err == ECP_ERR_CLOSED) return;
if (ctx->handle_err) ctx->handle_err(conn, mtype, err);
}
@@ -1643,12 +1608,52 @@ static ssize_t _send_ireq(ECPConnection *conn, ECPTimerItem *ti) {
}
static ssize_t _retry_ireq(ECPConnection *conn, ECPTimerItem *ti) {
+ ECPSocket *sock = conn->sock;
+ ECPDHKey key;
+ int is_open, refcount_ok;
int rv;
- rv = ecp_conn_reset_outb(conn);
+ rv = ecp_dhkey_gen(&key);
+ if (rv) return rv;
+
+#ifdef ECP_WITH_PTHREAD
+ pthread_mutex_lock(&sock->conn_table.mutex);
+ pthread_mutex_lock(&conn->mutex);
+#endif
+
+ rv = ECP_OK;
+ refcount_ok = 0;
+
+ is_open = _ecp_conn_is_open(conn);
+ if (!is_open) {
+ /* caller (timer) holds one reference */
+ refcount_ok = 1;
+ if (!ecp_conn_is_gc(conn)) refcount_ok++;
+
+ refcount_ok = (conn->refcount == refcount_ok);
+ if (refcount_ok) {
+ rv = conn_dhkey_new(conn, conn->key_curr, &key);
+ }
+ }
+
+#ifdef ECP_WITH_PTHREAD
+ pthread_mutex_unlock(&conn->mutex);
+ pthread_mutex_unlock(&sock->conn_table.mutex);
+#endif
if (rv) return rv;
- return _send_ireq(conn, ti);
+ if (is_open) {
+ /* already opened, that's OK */
+ return 0;
+ }
+
+ if (refcount_ok) {
+ return _send_ireq(conn, ti);
+ } else {
+ /* check later */
+ rv = ecp_timer_push(ti);
+ return rv;
+ }
}
ssize_t ecp_send_init_req(ECPConnection *conn, int retry) {
@@ -1911,7 +1916,7 @@ ssize_t ecp_send_open_rep(ECPConnection *conn) {
ssize_t ecp_handle_open(ECPConnection *conn, unsigned char mtype, unsigned char *msg, size_t msg_size, ECP2Buffer *bufs) {
ecp_open_handler_t handler;
- int is_open, is_gc;
+ int is_reg, is_open, is_gc;
int _rv = ECP_OK;
ssize_t rv;
@@ -1919,37 +1924,55 @@ ssize_t ecp_handle_open(ECPConnection *conn, unsigned char mtype, unsigned char
pthread_mutex_lock(&conn->mutex);
#endif
+ is_reg = _ecp_conn_is_reg(conn);
is_open = _ecp_conn_is_open(conn);
+ if (!is_reg) _rv = ECP_ERR_CLOSED;
+ if (!_rv && is_open) _rv = ECP_ERR;
+
+ /* set open if registered, avoids race condition with timeout handler */
+ if (!_rv) _ecp_conn_set_open(conn);
#ifdef ECP_WITH_PTHREAD
pthread_mutex_unlock(&conn->mutex);
#endif
- if (is_open) return ECP_ERR;
+ if (_rv) return _rv;
if (mtype == ECP_MTYPE_OPEN_REQ) {
- if (ecp_conn_is_outb(conn)) return ECP_ERR;
+ if (ecp_conn_is_outb(conn)) {
+ _rv = ECP_ERR;
+ goto handle_open_fin;
+ }
rv = 2;
- if (msg_size < rv) return ECP_ERR_SIZE;
+ if (msg_size < rv) {
+ _rv = ECP_ERR_SIZE;
+ goto handle_open_fin;
+ }
if (msg[1]) rv += ECP_SIZE_VBOX;
- if (msg_size < rv) return ECP_ERR_SIZE;
+ if (msg_size < rv) {
+ _rv = ECP_ERR_SIZE;
+ goto handle_open_fin;
+ }
} else {
- if (ecp_conn_is_inb(conn)) return ECP_ERR;
+ if (ecp_conn_is_inb(conn)) {
+ _rv = ECP_ERR;
+ goto handle_open_fin;
+ }
rv = 0;
}
is_gc = ecp_conn_is_gc(conn);
if (is_gc) {
_rv = ecp_conn_insert_gc(conn);
- if (_rv) return _rv;
+ if (_rv) goto handle_open_fin;
}
_rv = ecp_ext_conn_open(conn);
if (_rv) {
if (is_gc) ecp_conn_remove_gc(conn);
- return _rv;
+ goto handle_open_fin;
}
handler = ecp_get_open_handler(conn);
@@ -1958,25 +1981,30 @@ ssize_t ecp_handle_open(ECPConnection *conn, unsigned char mtype, unsigned char
if (_rv) {
if (is_gc) ecp_conn_remove_gc(conn);
ecp_ext_conn_close(conn);
- return _rv;
+ goto handle_open_fin;
}
}
+ if (ecp_conn_is_inb(conn)) {
+ ecp_tr_release(bufs->packet, 1);
+ ecp_send_open_rep(conn);
+ } else if (ecp_conn_is_root(conn)) {
+ ecp_conn_remove_addr(conn);
+ }
+
+handle_open_fin:
+ if (_rv) {
#ifdef ECP_WITH_PTHREAD
- pthread_mutex_lock(&conn->mutex);
+ pthread_mutex_lock(&conn->mutex);
#endif
- _ecp_conn_set_open(conn);
+ _ecp_conn_clr_open(conn);
#ifdef ECP_WITH_PTHREAD
- pthread_mutex_unlock(&conn->mutex);
+ pthread_mutex_unlock(&conn->mutex);
#endif
- if (ecp_conn_is_inb(conn)) {
- ecp_tr_release(bufs->packet, 1);
- ecp_send_open_rep(conn);
- } else if (ecp_conn_is_root(conn)) {
- ecp_conn_remove_addr(conn);
+ return _rv;
}
return rv;
diff --git a/ecp/src/ecp/core.h b/ecp/src/ecp/core.h
index 30c00b3..6f1dbab 100644
--- a/ecp/src/ecp/core.h
+++ b/ecp/src/ecp/core.h
@@ -404,7 +404,6 @@ int ecp_cookie_verify(ECPSocket *sock, unsigned char *cookie, unsigned char *pub
ECPConnection *ecp_conn_new_inb(ECPSocket *sock, unsigned char ctype);
void ecp_conn_init(ECPConnection *conn, ECPSocket *sock, unsigned char ctype);
int ecp_conn_init_outb(ECPConnection *conn);
-int ecp_conn_reset(ECPConnection *conn);
void ecp_conn_set_flags(ECPConnection *conn, unsigned char flags);
void ecp_conn_clr_flags(ECPConnection *conn, unsigned char flags);
void ecp_conn_set_remote_key(ECPConnection *conn, ECPDHPub *key);
@@ -412,21 +411,19 @@ void ecp_conn_set_remote_addr(ECPConnection *conn, ecp_tr_addr_t *addr);
int ecp_conn_create(ECPConnection *conn, ECPConnection *parent);
int ecp_conn_create_inb(ECPConnection *conn, ECPConnection *parent, unsigned char s_idx, unsigned char c_idx, ecp_ecdh_public_t *public, ECPDHPub *rkey_perma, ecp_aead_key_t *shkey);
int ecp_conn_create_outb(ECPConnection *conn, ECPConnection *parent, ECPNode *node);
-int ecp_conn_reset_outb(ECPConnection *conn);
void ecp_conn_destroy(ECPConnection *conn);
void ecp_conn_free(ECPConnection *conn);
int ecp_conn_insert(ECPConnection *conn);
int ecp_conn_insert_gc(ECPConnection *conn);
+int _ecp_conn_remove(ECPConnection *conn);
void ecp_conn_remove(ECPConnection *conn);
void ecp_conn_remove_addr(ECPConnection *conn);
void ecp_conn_remove_gc(ECPConnection *conn);
int _ecp_conn_open(ECPConnection *conn, ECPConnection *parent, ECPNode *node, int retry);
-int _ecp_conn_reopen(ECPConnection *conn, int retry);
int ecp_conn_open(ECPConnection *conn, ECPNode *node);
int ecp_conn_try_open(ECPConnection *conn, ECPNode *node);
-int ecp_conn_reopen(ECPConnection *conn);
void _ecp_conn_close(ECPConnection *conn);
void ecp_conn_close(ECPConnection *conn);
diff --git a/ecp/src/ecp/timer.c b/ecp/src/ecp/timer.c
index 6b58303..00478ed 100644
--- a/ecp/src/ecp/timer.c
+++ b/ecp/src/ecp/timer.c
@@ -181,14 +181,20 @@ ecp_sts_t ecp_timer_exe(ECPSocket *sock) {
_rv = retry(conn, to_exec+i);
if (_rv < 0) rv = _rv;
}
- if (rv && (rv != ECP_ERR_CLOSED)) {
+ if (rv) {
ecp_err_handle(conn, mtype, rv);
}
} else {
rv = ECP_ERR_TIMEOUT;
- ecp_err_handle(conn, mtype, rv);
if (mtype == ECP_MTYPE_OPEN_REP) {
- ecp_conn_remove(conn);
+ int _rv;
+
+ /* remove only if connection is not already open, avoids race condition with open reply message handler */
+ _rv = _ecp_conn_remove(conn);
+ if (_rv) rv = ECP_OK;
+ }
+ if (rv) {
+ ecp_err_handle(conn, mtype, rv);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 22:02:14 +0000