uv_pipe_ipc_svr.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <uv.h>

uv_loop_t *loop;

typedef struct {
    uv_write_t req;
    uv_buf_t buf;
} write_req_t;

void free_write_req(uv_write_t *req) {
    write_req_t *wr = (write_req_t*) req;
    free(wr->buf.base);
    free(wr);
}

void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
  buf->base = malloc(suggested_size);
  buf->len = suggested_size;
}

void echo_write(uv_write_t *req, int status) {
    if (status < 0) {
        fprintf(stderr, "Write error %s\n", uv_err_name(status));
    }
    free_write_req(req);
}

void echo_read(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
    if (nread > 0) {
        write_req_t *req = (write_req_t*) calloc(1, sizeof(write_req_t));
        if (req == NULL) {
            return;
        }
        req->buf = uv_buf_init(buf->base, (unsigned int)nread);
        uv_write((uv_write_t*) req, client, &req->buf, 1, echo_write);
        return;
    }

    if (nread < 0) {
        if (nread != UV_EOF)
            fprintf(stderr, "Read error %s\n", uv_err_name(nread));
        uv_close((uv_handle_t*) client, NULL);
    }

    free(buf->base);
}

void on_new_connection(uv_stream_t *server, int status) {
    uv_pipe_t *client;
    if (status == -1) {
        // error!
        return;
    }

    client = (uv_pipe_t*) malloc(sizeof(uv_pipe_t));
    uv_pipe_init(loop, client, 0);
    if (uv_accept(server, (uv_stream_t*) client) == 0) {
        uv_read_start((uv_stream_t*) client, alloc_buffer, echo_read);
    }
    else {
        uv_close((uv_handle_t*) client, NULL);
    }
}

#if defined(__unix__)
static const char* pipe_name = "/tmp/.uv.ipc.sock";
#else
static const char* pipe_name = "\\\\.\\pipe\\OutlineService.Pipe";
#endif

void close_pipe(uv_loop_t *loop, const char *pipe) {
    uv_fs_t req;
    uv_fs_unlink(loop, &req, pipe, NULL);
    printf("exiting pipe \"%s\"\n", pipe);
}

void ctrl_c_handler(int sig) {
    close_pipe(loop, pipe_name);
    exit(0);
}

#define SIGTERM_MSG "SIGTERM received.\n"

#if defined(__unix__) || defined(__linux__)
#include <signal.h>
void sig_term_handler(int signum, siginfo_t *info, void *ptr)
{
    printf("%s\n", SIGTERM_MSG);
    close_pipe(loop, pipe_name);
    exit(0);
}
#endif // defined(__unix__) || defined(__linux__)

void catch_sigterm()
{
    #if (defined(__unix__) || defined(__linux__)) && !defined(__mips)
    static struct sigaction _sigact;

    memset(&_sigact, 0, sizeof(_sigact));
    _sigact.sa_sigaction = sig_term_handler;
    _sigact.sa_flags = SA_SIGINFO;

    sigaction(SIGTERM, &_sigact, NULL);
    #endif // (defined(__unix__) || defined(__linux__)) && !defined(__mips)
}

int main() {
    union uv_any_handle server; // uv_pipe_t //
    int r;

    loop = uv_default_loop();

    // close_pipe(loop, pipe_name);

    uv_pipe_init(loop, &server.pipe, 0);

    signal(SIGINT, ctrl_c_handler);
    catch_sigterm();

    printf("listening on pipe \"%s\"\n", pipe_name);

    if ((r = uv_pipe_bind(&server.pipe, pipe_name))) {
        fprintf(stderr, "Bind error %s\n", uv_err_name(r));
        return 1;
    }

    uv_pipe_chmod(&server.pipe, UV_WRITABLE | UV_READABLE);

    if ((r = uv_listen((uv_stream_t*) &server.stream, 128, on_new_connection))) {
        fprintf(stderr, "Listen error %s\n", uv_err_name(r));
        return 2;
    }
    return uv_run(loop, UV_RUN_DEFAULT);
}

test.js file

//
// usage: node ./test.js <remoteProxyIp> <tapDeviceName> <tapDeviceGatewayIp>
// 
// for example: node ./test.js 123.45.67.89 ssr-route-tap0 10.0.85.1
//

var net = require('net');
var domain = require('domain');

var remoteProxyIp = process.argv[2];
if (remoteProxyIp == undefined) {
    remoteProxyIp = "123.45.67.89";
}

var tapDeviceName = process.argv[3];
if (tapDeviceName == undefined) {
    tapDeviceName = "ssr-route-tap0";
}

var tapDeviceGatewayIp = process.argv[4];
if (tapDeviceGatewayIp == undefined) {
    tapDeviceGatewayIp = "10.0.85.1";
}

var addr = '/tmp/.uv.ipc.sock';

var d = domain.create();
d.on('error', function(err) {
    console.error(err);
});

d.run(function() {
    var client = net.createConnection({ path: addr }, function() {
        console.log("Connected");
        client.on('data', function(data) {
            console.log("Recieved: " + data);
        });
        client.on('error', function(){
            console.log(arguments);
        });

        client.on('end', function() { 
            console.log('Disconnecting server...');
        });

        const cleanup = () => {
            client.removeAllListeners();
            process.exit();
        };
        client.once('close', cleanup);
        client.once('error', cleanup);

        client.write(`{"action":"configureRouting","parameters":{"proxyIp":"${remoteProxyIp}","tapDeviceName":"${tapDeviceName}","tapDeviceGatewayIp":"${tapDeviceGatewayIp}","isAutoConnect":false}}`);

    }.bind(this));

    function timeoutQuit(arg) {
        // client.destroy();
        process.exit();
    }

    process.on('SIGINT', function() {
        console.log("Caught interrupt signal");
        client.write('{"action":"resetRouting","parameters":{}}');
        setTimeout(timeoutQuit, 2000, 'JustExit');
    });
});