aboutsummaryrefslogtreecommitdiff
path: root/test/test_msgnet.cpp
blob: f6dbe1b9211e632959350d08730b84a8bde868c2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
/**
 * Copyright (c) 2018 Cornell University.
 *
 * Author: Ted Yin <[email protected]>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <cstdio>
#include <string>
#include <functional>

#include "salticidae/msg.h"
#include "salticidae/event.h"
#include "salticidae/network.h"
#include "salticidae/stream.h"

using salticidae::NetAddr;
using salticidae::DataStream;
using salticidae::MsgNetwork;
using salticidae::htole;
using salticidae::letoh;
using std::placeholders::_1;
using std::placeholders::_2;

/** Hello Message. */
struct MsgHello {
    static const uint8_t opcode = 0x0;
    DataStream serialized;
    std::string name;
    std::string text;
    /** Defines how to serialize the msg. */
    MsgHello(const std::string &name,
            const std::string &text) {
        serialized << htole((uint32_t)name.length());
        serialized << name << text;
    }
    /** Defines how to parse the msg. */
    MsgHello(DataStream &&s) {
        uint32_t len;
        s >> len;
        len = letoh(len);
        name = std::string((const char *)s.get_data_inplace(len), len);
        len = s.size();
        text = std::string((const char *)s.get_data_inplace(len), len);
    }
};

/** Acknowledgement Message. */
struct MsgAck {
    static const uint8_t opcode = 0x1;
    DataStream serialized;
    MsgAck() {}
    MsgAck(DataStream &&s) {}
};

const uint8_t MsgHello::opcode;
const uint8_t MsgAck::opcode;

using MsgNetworkByteOp = MsgNetwork<uint8_t>;

struct MyNet: public MsgNetworkByteOp {
    const std::string name;
    const NetAddr peer;

    MyNet(const salticidae::EventContext &ec,
            const std::string name,
            const NetAddr &peer):
            MsgNetwork<uint8_t>(ec, MsgNetwork::Config()),
            name(name),
            peer(peer) {
        /* message handler could be a bound method */
        reg_handler(
            salticidae::generic_bind(&MyNet::on_receive_hello, this, _1, _2));

        reg_conn_handler([this](const ConnPool::conn_t &conn, bool connected) {
            if (connected)
            {
                if (conn->get_mode() == ConnPool::Conn::ACTIVE)
                {
                    printf("[%s] Connected, sending hello.\n",
                            this->name.c_str());
                    /* send the first message through this connection */
                    send_msg(MsgHello(this->name, "Hello there!"),
                            salticidae::static_pointer_cast<Conn>(conn));
                }
                else
                    printf("[%s] Accepted, waiting for greetings.\n",
                            this->name.c_str());
            }
            else
            {
                printf("[%s] Disconnected, retrying.\n", this->name.c_str());
                /* try to reconnect to the same address */
                connect(conn->get_addr(), false);
            }
            return true;
        });
    }

    void on_receive_hello(MsgHello &&msg, const MyNet::conn_t &conn) {
        printf("[%s] %s says %s\n",
                name.c_str(),
                msg.name.c_str(), msg.text.c_str());
        /* send acknowledgement */
        send_msg(MsgAck(), conn);
    }
};


void on_receive_ack(MsgAck &&msg, const MyNet::conn_t &conn) {
    auto net = static_cast<MyNet *>(conn->get_net());
    printf("[%s] the peer knows\n", net->name.c_str());
}

int main() {
    salticidae::EventContext ec;
    NetAddr alice_addr("127.0.0.1:12345");
    NetAddr bob_addr("127.0.0.1:12346");

    /* test two nodes in the same main loop */
    MyNet alice(ec, "Alice", bob_addr);
    MyNet bob(ec, "Bob", alice_addr);

    /* message handler could be a normal function */
    alice.reg_handler(on_receive_ack);
    bob.reg_handler(on_receive_ack);

    /* start all threads */
    alice.start();
    bob.start();

    /* accept incoming connections */
    alice.listen(alice_addr);
    bob.listen(bob_addr);

    /* try to connect once */
    alice.connect(bob_addr, false);
    bob.connect(alice_addr, false);

    /* the main loop can be shutdown by ctrl-c or kill */
    auto shutdown = [&](int) {ec.stop();};
    salticidae::SigEvent ev_sigint(ec, shutdown);
    salticidae::SigEvent ev_sigterm(ec, shutdown);
    ev_sigint.add(SIGINT);
    ev_sigterm.add(SIGTERM);

    /* enter the main loop */
    ec.dispatch();
    return 0;
}