lib/stream.h

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2013, 2015 Nicira, Inc.
   3  *
   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:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 #ifndef STREAM_H
  18 #define STREAM_H 1
  19
  20 #include <stdbool.h>
  21 #include <stddef.h>
  22 #include <stdint.h>
  23 #include <sys/types.h>
  24 #include "openvswitch/types.h"
  25 #include "socket-util.h"
  26 #include "util.h"
  27
  28 struct pstream;
  29 struct stream;
  30 struct vlog_module;
  31
  32 void stream_usage(const char *name, bool active, bool passive, bool bootstrap);
  33
  34 /* Bidirectional byte streams. */
  35 int stream_verify_name(const char *name);
  36 int stream_open(const char *name, struct stream **, uint8_t dscp);
  37 int stream_open_block(int error, struct stream **);
  38 void stream_close(struct stream *);
  39 const char *stream_get_name(const struct stream *);
  40 ovs_be32 stream_get_remote_ip(const struct stream *);
  41 ovs_be16 stream_get_remote_port(const struct stream *);
  42 ovs_be32 stream_get_local_ip(const struct stream *);
  43 ovs_be16 stream_get_local_port(const struct stream *);
  44 int stream_connect(struct stream *);
  45 int stream_recv(struct stream *, void *buffer, size_t n);
  46 int stream_send(struct stream *, const void *buffer, size_t n);
  47
  48 void stream_run(struct stream *);
  49 void stream_run_wait(struct stream *);
  50
  51 enum stream_wait_type {
  52     STREAM_CONNECT,
  53     STREAM_RECV,
  54     STREAM_SEND
  55 };
  56 void stream_wait(struct stream *, enum stream_wait_type);
  57 void stream_connect_wait(struct stream *);
  58 void stream_recv_wait(struct stream *);
  59 void stream_send_wait(struct stream *);
  60
  61 /* Passive streams: listeners for incoming stream connections. */
  62 int pstream_verify_name(const char *name);
  63 int pstream_open(const char *name, struct pstream **, uint8_t dscp);
  64 const char *pstream_get_name(const struct pstream *);
  65 void pstream_close(struct pstream *);
  66 int pstream_accept(struct pstream *, struct stream **);
  67 int pstream_accept_block(struct pstream *, struct stream **);
  68 void pstream_wait(struct pstream *);
  69
  70 ovs_be16 pstream_get_bound_port(const struct pstream *);
  71 \f
  72 /* Convenience functions. */
  73
  74 int stream_open_with_default_port(const char *name,
  75                                   uint16_t default_port,
  76                                   struct stream **,
  77                                   uint8_t dscp);
  78 int pstream_open_with_default_port(const char *name,
  79                                    uint16_t default_port,
  80                                    struct pstream **,
  81                                    uint8_t dscp);
  82 bool stream_parse_target_with_default_port(const char *target,
  83                                            uint16_t default_port,
  84                                            struct sockaddr_storage *ss);
  85 int stream_or_pstream_needs_probes(const char *name);
  86
  87 /* Error reporting. */
  88
  89 enum stream_content_type {
  90     STREAM_UNKNOWN,
  91     STREAM_OPENFLOW,
  92     STREAM_SSL,
  93     STREAM_JSONRPC
  94 };
  95
  96 void stream_report_content(const void *, ssize_t, enum stream_content_type,
  97                            struct vlog_module *, const char *stream_name);
  98
  99 #endif /* stream.h */