/* 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 #include #include #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_NOT_NULL(req); 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_NULL(addr); return; } ASSERT_NOT_NULL(addr); 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); #if !defined(__OpenBSD__) && !defined(__NetBSD__) r = uv_udp_set_source_membership(&server, MULTICAST_ADDR, NULL, source_addr, UV_JOIN_GROUP); ASSERT(r == 0); #endif 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; }