1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22 #include "uv.h"
23 #include "task.h"
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28
29 #define CHECK_HANDLE(handle) \
30 ASSERT((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client)
31
32 #define MULTICAST_ADDR "239.255.0.1"
33
34 static uv_udp_t server;
35 static uv_udp_t client;
36 static uv_udp_send_t req;
37 static uv_udp_send_t req_ss;
38
39 static int cl_recv_cb_called;
40
41 static int sv_send_cb_called;
42
43 static int close_cb_called;
44
alloc_cb(uv_handle_t * handle,size_t suggested_size,uv_buf_t * buf)45 static void alloc_cb(uv_handle_t* handle,
46 size_t suggested_size,
47 uv_buf_t* buf) {
48 static char slab[65536];
49 CHECK_HANDLE(handle);
50 ASSERT(suggested_size <= sizeof(slab));
51 buf->base = slab;
52 buf->len = sizeof(slab);
53 }
54
55
close_cb(uv_handle_t * handle)56 static void close_cb(uv_handle_t* handle) {
57 CHECK_HANDLE(handle);
58 close_cb_called++;
59 }
60
61
sv_send_cb(uv_udp_send_t * req,int status)62 static void sv_send_cb(uv_udp_send_t* req, int status) {
63 ASSERT_NOT_NULL(req);
64 ASSERT(status == 0);
65 CHECK_HANDLE(req->handle);
66
67 sv_send_cb_called++;
68
69 if (sv_send_cb_called == 2)
70 uv_close((uv_handle_t*) req->handle, close_cb);
71 }
72
73
do_send(uv_udp_send_t * send_req)74 static int do_send(uv_udp_send_t* send_req) {
75 uv_buf_t buf;
76 struct sockaddr_in addr;
77
78 buf = uv_buf_init("PING", 4);
79
80 ASSERT(0 == uv_ip4_addr(MULTICAST_ADDR, TEST_PORT, &addr));
81
82 /* client sends "PING" */
83 return uv_udp_send(send_req,
84 &client,
85 &buf,
86 1,
87 (const struct sockaddr*) &addr,
88 sv_send_cb);
89 }
90
91
cl_recv_cb(uv_udp_t * handle,ssize_t nread,const uv_buf_t * buf,const struct sockaddr * addr,unsigned flags)92 static void cl_recv_cb(uv_udp_t* handle,
93 ssize_t nread,
94 const uv_buf_t* buf,
95 const struct sockaddr* addr,
96 unsigned flags) {
97 CHECK_HANDLE(handle);
98 ASSERT(flags == 0);
99
100 if (nread < 0) {
101 ASSERT(0 && "unexpected error");
102 }
103
104 if (nread == 0) {
105 /* Returning unused buffer. Don't count towards cl_recv_cb_called */
106 ASSERT_NULL(addr);
107 return;
108 }
109
110 ASSERT_NOT_NULL(addr);
111 ASSERT(nread == 4);
112 ASSERT(!memcmp("PING", buf->base, nread));
113
114 cl_recv_cb_called++;
115
116 if (cl_recv_cb_called == 2) {
117 /* we are done with the server handle, we can close it */
118 uv_close((uv_handle_t*) &server, close_cb);
119 } else {
120 int r;
121 char source_addr[64];
122
123 r = uv_ip4_name((const struct sockaddr_in*)addr, source_addr, sizeof(source_addr));
124 ASSERT(r == 0);
125
126 r = uv_udp_set_membership(&server, MULTICAST_ADDR, NULL, UV_LEAVE_GROUP);
127 ASSERT(r == 0);
128
129 #if !defined(__OpenBSD__) && !defined(__NetBSD__)
130 r = uv_udp_set_source_membership(&server, MULTICAST_ADDR, NULL, source_addr, UV_JOIN_GROUP);
131 ASSERT(r == 0);
132 #endif
133
134 r = do_send(&req_ss);
135 ASSERT(r == 0);
136 }
137 }
138
139
TEST_IMPL(udp_multicast_join)140 TEST_IMPL(udp_multicast_join) {
141 int r;
142 struct sockaddr_in addr;
143
144 ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
145
146 r = uv_udp_init(uv_default_loop(), &server);
147 ASSERT(r == 0);
148
149 r = uv_udp_init(uv_default_loop(), &client);
150 ASSERT(r == 0);
151
152 /* bind to the desired port */
153 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
154 ASSERT(r == 0);
155
156 /* join the multicast channel */
157 r = uv_udp_set_membership(&server, MULTICAST_ADDR, NULL, UV_JOIN_GROUP);
158 if (r == UV_ENODEV)
159 RETURN_SKIP("No multicast support.");
160 ASSERT(r == 0);
161
162 r = uv_udp_recv_start(&server, alloc_cb, cl_recv_cb);
163 ASSERT(r == 0);
164
165 r = do_send(&req);
166 ASSERT(r == 0);
167
168 ASSERT(close_cb_called == 0);
169 ASSERT(cl_recv_cb_called == 0);
170 ASSERT(sv_send_cb_called == 0);
171
172 /* run the loop till all events are processed */
173 uv_run(uv_default_loop(), UV_RUN_DEFAULT);
174
175 ASSERT(cl_recv_cb_called == 2);
176 ASSERT(sv_send_cb_called == 2);
177 ASSERT(close_cb_called == 2);
178
179 MAKE_VALGRIND_HAPPY();
180 return 0;
181 }
182