2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
23 #include "openvswitch/types.h"
24 #include "ovs-thread.h"
26 /* A wrapper around vconn that provides queuing and optionally reliability.
28 * An rconn maintains a message transmission queue of bounded length specified
29 * by the caller. The rconn does not guarantee reliable delivery of
30 * queued messages: all queued messages are dropped when reconnection becomes
33 * An rconn optionally provides reliable communication, in this sense: the
34 * rconn will re-connect, with exponential backoff, when the underlying vconn
39 struct rconn_packet_counter;
41 struct rconn *rconn_create(int inactivity_probe_interval,
42 int max_backoff, uint8_t dscp,
43 uint32_t allowed_versions);
44 void rconn_set_dscp(struct rconn *rc, uint8_t dscp);
45 uint32_t rconn_get_allowed_versions(const struct rconn *);
46 uint8_t rconn_get_dscp(const struct rconn *rc);
47 void rconn_set_max_backoff(struct rconn *, int max_backoff);
48 int rconn_get_max_backoff(const struct rconn *);
49 void rconn_set_probe_interval(struct rconn *, int inactivity_probe_interval);
50 int rconn_get_probe_interval(const struct rconn *);
52 void rconn_connect(struct rconn *, const char *target, const char *name);
53 void rconn_connect_unreliably(struct rconn *,
54 struct vconn *, const char *name);
55 void rconn_reconnect(struct rconn *);
56 void rconn_disconnect(struct rconn *);
57 void rconn_destroy(struct rconn *);
59 void rconn_run(struct rconn *);
60 void rconn_run_wait(struct rconn *);
61 struct ofpbuf *rconn_recv(struct rconn *);
62 void rconn_recv_wait(struct rconn *);
63 int rconn_send(struct rconn *, struct ofpbuf *, struct rconn_packet_counter *);
64 int rconn_send_with_limit(struct rconn *, struct ofpbuf *,
65 struct rconn_packet_counter *, int queue_limit);
66 unsigned int rconn_packets_sent(const struct rconn *);
67 unsigned int rconn_packets_received(const struct rconn *);
69 void rconn_add_monitor(struct rconn *, struct vconn *);
71 const char *rconn_get_name(const struct rconn *);
72 void rconn_set_name(struct rconn *, const char *new_name);
73 const char *rconn_get_target(const struct rconn *);
75 bool rconn_is_alive(const struct rconn *);
76 bool rconn_is_connected(const struct rconn *);
77 bool rconn_is_admitted(const struct rconn *);
78 int rconn_failure_duration(const struct rconn *);
80 ovs_be32 rconn_get_remote_ip(const struct rconn *);
81 ovs_be16 rconn_get_remote_port(const struct rconn *);
82 ovs_be32 rconn_get_local_ip(const struct rconn *);
83 ovs_be16 rconn_get_local_port(const struct rconn *);
84 int rconn_get_version(const struct rconn *);
86 const char *rconn_get_state(const struct rconn *);
87 time_t rconn_get_last_connection(const struct rconn *);
88 time_t rconn_get_last_disconnect(const struct rconn *);
89 unsigned int rconn_get_connection_seqno(const struct rconn *);
90 int rconn_get_last_error(const struct rconn *);
91 unsigned int rconn_count_txqlen(const struct rconn *);
93 /* Counts packets and bytes queued into an rconn by a given source. */
94 struct rconn_packet_counter {
95 struct ovs_mutex mutex;
96 unsigned int n_packets OVS_GUARDED; /* Number of packets queued. */
97 unsigned int n_bytes OVS_GUARDED; /* Number of bytes queued. */
98 int ref_cnt OVS_GUARDED; /* Number of owners. */
101 struct rconn_packet_counter *rconn_packet_counter_create(void);
102 void rconn_packet_counter_destroy(struct rconn_packet_counter *);
103 void rconn_packet_counter_inc(struct rconn_packet_counter *, unsigned n_bytes);
104 void rconn_packet_counter_dec(struct rconn_packet_counter *, unsigned n_bytes);
106 unsigned int rconn_packet_counter_n_packets(
107 const struct rconn_packet_counter *);
108 unsigned int rconn_packet_counter_n_bytes(const struct rconn_packet_counter *);