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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* 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 "uv.h"
#include "task.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define CHECK_HANDLE(handle) \
ASSERT((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client)
#define MULTICAST_ADDR "239.255.0.1"
static uv_udp_t server;
static uv_udp_t client;
static uv_udp_send_t req;
static uv_udp_send_t req_ss;
static int cl_recv_cb_called;
static int sv_send_cb_called;
static int close_cb_called;
static void alloc_cb(uv_handle_t* handle,
size_t suggested_size,
uv_buf_t* buf) {
static char slab[65536];
CHECK_HANDLE(handle);
ASSERT(suggested_size <= sizeof(slab));
buf->base = slab;
buf->len = sizeof(slab);
}
static void close_cb(uv_handle_t* handle) {
CHECK_HANDLE(handle);
close_cb_called++;
}
static void sv_send_cb(uv_udp_send_t* req, int status) {
ASSERT(req != NULL);
ASSERT(status == 0);
CHECK_HANDLE(req->handle);
sv_send_cb_called++;
if (sv_send_cb_called == 2)
uv_close((uv_handle_t*) req->handle, close_cb);
}
static int do_send(uv_udp_send_t* send_req) {
uv_buf_t buf;
struct sockaddr_in addr;
buf = uv_buf_init("PING", 4);
ASSERT(0 == uv_ip4_addr(MULTICAST_ADDR, TEST_PORT, &addr));
/* client sends "PING" */
return uv_udp_send(send_req,
&client,
&buf,
1,
(const struct sockaddr*) &addr,
sv_send_cb);
}
static void cl_recv_cb(uv_udp_t* handle,
ssize_t nread,
const uv_buf_t* buf,
const struct sockaddr* addr,
unsigned flags) {
CHECK_HANDLE(handle);
ASSERT(flags == 0);
if (nread < 0) {
ASSERT(0 && "unexpected error");
}
if (nread == 0) {
/* Returning unused buffer. Don't count towards cl_recv_cb_called */
ASSERT(addr == NULL);
return;
}
ASSERT(addr != NULL);
ASSERT(nread == 4);
ASSERT(!memcmp("PING", buf->base, nread));
cl_recv_cb_called++;
if (cl_recv_cb_called == 2) {
/* we are done with the server handle, we can close it */
uv_close((uv_handle_t*) &server, close_cb);
} else {
int r;
char source_addr[64];
r = uv_ip4_name((const struct sockaddr_in*)addr, source_addr, sizeof(source_addr));
ASSERT(r == 0);
r = uv_udp_set_membership(&server, MULTICAST_ADDR, NULL, UV_LEAVE_GROUP);
ASSERT(r == 0);
r = uv_udp_set_source_membership(&server, MULTICAST_ADDR, NULL, source_addr, UV_JOIN_GROUP);
ASSERT(r == 0);
r = do_send(&req_ss);
ASSERT(r == 0);
}
}
TEST_IMPL(udp_multicast_join) {
int r;
struct sockaddr_in addr;
ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
r = uv_udp_init(uv_default_loop(), &server);
ASSERT(r == 0);
r = uv_udp_init(uv_default_loop(), &client);
ASSERT(r == 0);
/* bind to the desired port */
r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
ASSERT(r == 0);
/* join the multicast channel */
r = uv_udp_set_membership(&server, MULTICAST_ADDR, NULL, UV_JOIN_GROUP);
if (r == UV_ENODEV)
RETURN_SKIP("No multicast support.");
ASSERT(r == 0);
r = uv_udp_recv_start(&server, alloc_cb, cl_recv_cb);
ASSERT(r == 0);
r = do_send(&req);
ASSERT(r == 0);
ASSERT(close_cb_called == 0);
ASSERT(cl_recv_cb_called == 0);
ASSERT(sv_send_cb_called == 0);
/* run the loop till all events are processed */
uv_run(uv_default_loop(), UV_RUN_DEFAULT);
ASSERT(cl_recv_cb_called == 2);
ASSERT(sv_send_cb_called == 2);
ASSERT(close_cb_called == 2);
MAKE_VALGRIND_HAPPY();
return 0;
}
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