xref: /libuv/test/test-udp-multicast-join6.c (revision 5bb19f35)
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21 
22 #include "uv.h"
23 #include "task.h"
24 
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 
29 
30 #define CHECK_HANDLE(handle) \
31   ASSERT_NE((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client, 0)
32 
33 #if defined(__APPLE__)          || \
34     defined(_AIX)               || \
35     defined(__MVS__)            || \
36     defined(__NetBSD__)         || \
37     defined(__OpenBSD__)
38   #define MULTICAST_ADDR "ff02::1%lo0"
39   #define INTERFACE_ADDR "::1%lo0"
40 #else
41   #define MULTICAST_ADDR "ff02::1"
42   #define INTERFACE_ADDR NULL
43 #endif
44 
45 static uv_udp_t server;
46 static uv_udp_t client;
47 static uv_udp_send_t req;
48 static uv_udp_send_t req_ss;
49 
50 static int cl_recv_cb_called;
51 
52 static int sv_send_cb_called;
53 
54 static int close_cb_called;
55 
alloc_cb(uv_handle_t * handle,size_t suggested_size,uv_buf_t * buf)56 static void alloc_cb(uv_handle_t* handle,
57                      size_t suggested_size,
58                      uv_buf_t* buf) {
59   static char slab[65536];
60   CHECK_HANDLE(handle);
61   ASSERT_LE(suggested_size, sizeof(slab));
62   buf->base = slab;
63   buf->len = sizeof(slab);
64 }
65 
66 
close_cb(uv_handle_t * handle)67 static void close_cb(uv_handle_t* handle) {
68   CHECK_HANDLE(handle);
69   close_cb_called++;
70 }
71 
72 
sv_send_cb(uv_udp_send_t * req,int status)73 static void sv_send_cb(uv_udp_send_t* req, int status) {
74   ASSERT_NOT_NULL(req);
75   ASSERT_OK(status);
76   CHECK_HANDLE(req->handle);
77 
78   sv_send_cb_called++;
79 
80   if (sv_send_cb_called == 2)
81     uv_close((uv_handle_t*) req->handle, close_cb);
82 }
83 
84 
do_send(uv_udp_send_t * send_req)85 static int do_send(uv_udp_send_t* send_req) {
86   uv_buf_t buf;
87   struct sockaddr_in6 addr;
88 
89   buf = uv_buf_init("PING", 4);
90 
91   ASSERT_OK(uv_ip6_addr(MULTICAST_ADDR, TEST_PORT, &addr));
92 
93   /* client sends "PING" */
94   return uv_udp_send(send_req,
95                      &client,
96                      &buf,
97                      1,
98                      (const struct sockaddr*) &addr,
99                      sv_send_cb);
100 }
101 
102 
cl_recv_cb(uv_udp_t * handle,ssize_t nread,const uv_buf_t * buf,const struct sockaddr * addr,unsigned flags)103 static void cl_recv_cb(uv_udp_t* handle,
104                        ssize_t nread,
105                        const uv_buf_t* buf,
106                        const struct sockaddr* addr,
107                        unsigned flags) {
108   CHECK_HANDLE(handle);
109   ASSERT_OK(flags);
110 
111   if (nread < 0) {
112     ASSERT(0 && "unexpected error");
113   }
114 
115   if (nread == 0) {
116     /* Returning unused buffer. Don't count towards cl_recv_cb_called */
117     ASSERT_NULL(addr);
118     return;
119   }
120 
121   ASSERT_NOT_NULL(addr);
122   ASSERT_EQ(4, nread);
123   ASSERT(!memcmp("PING", buf->base, nread));
124 
125   cl_recv_cb_called++;
126 
127   if (cl_recv_cb_called == 2) {
128     /* we are done with the server handle, we can close it */
129     uv_close((uv_handle_t*) &server, close_cb);
130   } else {
131     int r;
132     char source_addr[64];
133 
134     r = uv_ip6_name((const struct sockaddr_in6*)addr, source_addr, sizeof(source_addr));
135     ASSERT_OK(r);
136 
137     r = uv_udp_set_membership(&server, MULTICAST_ADDR, INTERFACE_ADDR, UV_LEAVE_GROUP);
138     ASSERT_OK(r);
139 
140     r = uv_udp_set_source_membership(&server, MULTICAST_ADDR, INTERFACE_ADDR, source_addr, UV_JOIN_GROUP);
141     ASSERT_OK(r);
142 
143     r = do_send(&req_ss);
144     ASSERT_OK(r);
145   }
146 }
147 
148 
can_ipv6_external(void)149 static int can_ipv6_external(void) {
150   uv_interface_address_t* addr;
151   int supported;
152   int count;
153   int i;
154 
155   if (uv_interface_addresses(&addr, &count))
156     return 0;  /* Assume no IPv6 support on failure. */
157 
158   supported = 0;
159   for (i = 0; supported == 0 && i < count; i += 1)
160     supported = (AF_INET6 == addr[i].address.address6.sin6_family &&
161                  !addr[i].is_internal);
162 
163   uv_free_interface_addresses(addr, count);
164   return supported;
165 }
166 
167 
TEST_IMPL(udp_multicast_join6)168 TEST_IMPL(udp_multicast_join6) {
169   int r;
170   struct sockaddr_in6 addr;
171 
172   if (!can_ipv6_external())
173     RETURN_SKIP("No external IPv6 interface available");
174 
175   ASSERT_OK(uv_ip6_addr("::", TEST_PORT, &addr));
176 
177   r = uv_udp_init(uv_default_loop(), &server);
178   ASSERT_OK(r);
179 
180   r = uv_udp_init(uv_default_loop(), &client);
181   ASSERT_OK(r);
182 
183   /* bind to the desired port */
184   r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
185   ASSERT_OK(r);
186 
187   r = uv_udp_set_membership(&server, MULTICAST_ADDR, INTERFACE_ADDR, UV_JOIN_GROUP);
188   if (r == UV_ENODEV) {
189     MAKE_VALGRIND_HAPPY(uv_default_loop());
190     RETURN_SKIP("No ipv6 multicast route");
191   }
192 
193   ASSERT_OK(r);
194 
195 #if defined(__ANDROID__)
196   /* It returns an ENOSYS error */
197   RETURN_SKIP("Test does not currently work in ANDROID");
198 #endif
199 
200 /* TODO(gengjiawen): Fix test on QEMU. */
201 #if defined(__QEMU__)
202   RETURN_SKIP("Test does not currently work in QEMU");
203 #endif
204   r = uv_udp_recv_start(&server, alloc_cb, cl_recv_cb);
205   ASSERT_OK(r);
206 
207   r = do_send(&req);
208   ASSERT_OK(r);
209 
210   ASSERT_OK(close_cb_called);
211   ASSERT_OK(cl_recv_cb_called);
212   ASSERT_OK(sv_send_cb_called);
213 
214   /* run the loop till all events are processed */
215   uv_run(uv_default_loop(), UV_RUN_DEFAULT);
216 
217   ASSERT_EQ(2, cl_recv_cb_called);
218   ASSERT_EQ(2, sv_send_cb_called);
219   ASSERT_EQ(2, close_cb_called);
220 
221   MAKE_VALGRIND_HAPPY(uv_default_loop());
222   return 0;
223 }
224