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/**
* 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 <stdio.h>
#include <string.h>
#include "salticidae/event.h"
#include "salticidae/network.h"
#include "salticidae/stream.h"
/** Hello Message. */
const uint8_t msg_hello_opcode = 0x0;
typedef struct MsgHello {
const char *name;
const char *text;
} MsgHello;
/** Defines how to serialize the msg. */
datastream_t *msg_hello_serialize(const char *name, const char *text) {
datastream_t *serialized = datastream_new();
serialized << htole((uint32_t)name.length());
serialized << name << text;
return serialized;
}
/** Defines how to parse the msg. */
MsgHello msg_hello_unserialize(datastream_t *s) {
MsgHello res;
uint32_t len;
len = datastream_get_u32(s);
len = letoh(len);
const char *name = (const char *)malloc(len + 1);
memmove(name, datastream_get_data_inplace(s, len), len);
name[len] = 0;
len = datastream_size(s);
const char *text = (const char *)malloc(len + 1);
memmove(text, datastream_get_data_inplace(s, len), len);
text[len] = 0;
res.name = name;
res.text = text;
return res;
}
datastream_t *msg_ack_serialize() { return datastream_new(); }
struct MyNet {
msgnetwork_t *net;
const char *name;
const NetAddr peer;
} alice, bob;
void on_receive_hello(const msg_t *msg, const msgnetwork_conn_t *conn) {
msgnetwork_t *net = msgnetwork_conn_get_net(conn);
printf("[%s] %s says %s\n", name, msg.name, msg.text);
msg_t *msg = msg_new(0x1, msg_ack_serialize());
/* send acknowledgement */
send_msg(msg, conn);
msg_free(msg);
}
void on_receive_ack(const msg_t *msg, const msgnetwork_conn_t *conn) {
auto net = static_cast<MyNet *>(conn->get_net());
printf("[%s] the peer knows\n", net->name.c_str());
}
void conn_handler(const msgnetwork_conn_t *conn, bool connected) {
msgnetwork_t *net = msgnetwork_conn_get_net(conn);
const char *name = net == alice.net ? alice.name : bob.name;
if (connected)
{
if (conn->get_mode() == ConnPool::Conn::ACTIVE)
{
puts("[%s] Connected, sending hello.", name);
/* send the first message through this connection */
msgnetwork_send_msg(alice,
msg_hello_serialize("alice", "Hello there!"), conn);
}
else
printf("[%s] Accepted, waiting for greetings.\n", name);
}
else
{
printf("[%s] Disconnected, retrying.\n", name);
/* try to reconnect to the same address */
connect(conn->get_addr());
}
}
MyNet gen_mynet(const eventcontext_t *ec,
const char *name,
const netaddr_t *peer) {
MyNet res;
const msgnetwork_config_t *netconfig = msgnetwork_config_new();
res.net = msgnetwork_new(ec, netconfig);
res.name = name;
res.peer = peer;
};
void on_term_signal(int) {
ec.stop();
}
int main() {
eventcontext_t *ec = eventcontext_new();
netaddr_t *alice_addr = netaddr_new_from_sipport("127.0.0.1:12345");
netaddr_t *bob_addr = netaddr_new_from_sipport("127.0.0.1:12346");
/* test two nodes in the same main loop */
alice = gen_mynet(ec, "Alice", bob_addr);
bob = gen_mynet(ec, "Bob", alice_addr);
msgnetwork_reg_handler(alice.net, MSG_OPCODE_HELLO, on_receive_hello);
msgnetwork_reg_handler(alice.net, MSG_OPCODE_HELLO, on_receive_hello);
msgnetwork_reg_handler(bob.net, MSG_OPCODE_HELLO, on_receive_hello);
msgnetwork_reg_handler(bob.net, MSG_OPCODE_HELLO, on_receive_hello);
/* start all threads */
msgnetwork_start(alice.net);
msgnetwork_start(bob.net);
/* accept incoming connections */
msgnetwork_listen(alice_addr);
msgnetwork_listen(bob_addr);
/* try to connect once */
msgnetwork_connect(bob_addr);
msgnetwork_connect(alice_addr);
/* the main loop can be shutdown by ctrl-c or kill */
sigev_t *ev_sigint = sigev_new(ec, on_term_signal);
sigev_t *ev_sigterm = sigev_new(ec, on_term_signal);
sigev_add(ev_sigint, SIGINT);
sigev_add(ev_sigterm, SIGTERM);
/* enter the main loop */
eventcontext_dispatch(ec);
return 0;
}
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