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 static uv_udp_t server;
33 static uv_udp_t client;
34
35 static int cl_send_cb_called;
36 static int cl_recv_cb_called;
37
38 static int sv_send_cb_called;
39 static int sv_recv_cb_called;
40
41 static int close_cb_called;
42
43
alloc_cb(uv_handle_t * handle,size_t suggested_size,uv_buf_t * buf)44 static void alloc_cb(uv_handle_t* handle,
45 size_t suggested_size,
46 uv_buf_t* buf) {
47 static char slab[65536];
48 CHECK_HANDLE(handle);
49 ASSERT(suggested_size <= sizeof(slab));
50 buf->base = slab;
51 buf->len = sizeof(slab);
52 }
53
54
close_cb(uv_handle_t * handle)55 static void close_cb(uv_handle_t* handle) {
56 CHECK_HANDLE(handle);
57 ASSERT(1 == uv_is_closing(handle));
58 close_cb_called++;
59 }
60
61
cl_recv_cb(uv_udp_t * handle,ssize_t nread,const uv_buf_t * buf,const struct sockaddr * addr,unsigned flags)62 static void cl_recv_cb(uv_udp_t* handle,
63 ssize_t nread,
64 const uv_buf_t* buf,
65 const struct sockaddr* addr,
66 unsigned flags) {
67 CHECK_HANDLE(handle);
68 ASSERT(flags == 0);
69
70 if (nread < 0) {
71 ASSERT(0 && "unexpected error");
72 }
73
74 if (nread == 0) {
75 /* Returning unused buffer. Don't count towards cl_recv_cb_called */
76 ASSERT_NULL(addr);
77 return;
78 }
79
80 ASSERT_NOT_NULL(addr);
81 ASSERT(nread == 4);
82 ASSERT(!memcmp("PONG", buf->base, nread));
83
84 cl_recv_cb_called++;
85
86 uv_close((uv_handle_t*) handle, close_cb);
87 }
88
89
cl_send_cb(uv_udp_send_t * req,int status)90 static void cl_send_cb(uv_udp_send_t* req, int status) {
91 int r;
92
93 ASSERT_NOT_NULL(req);
94 ASSERT(status == 0);
95 CHECK_HANDLE(req->handle);
96
97 r = uv_udp_recv_start(req->handle, alloc_cb, cl_recv_cb);
98 ASSERT(r == 0);
99
100 cl_send_cb_called++;
101 }
102
103
sv_send_cb(uv_udp_send_t * req,int status)104 static void sv_send_cb(uv_udp_send_t* req, int status) {
105 ASSERT_NOT_NULL(req);
106 ASSERT(status == 0);
107 CHECK_HANDLE(req->handle);
108
109 uv_close((uv_handle_t*) req->handle, close_cb);
110 free(req);
111
112 sv_send_cb_called++;
113 }
114
115
sv_recv_cb(uv_udp_t * handle,ssize_t nread,const uv_buf_t * rcvbuf,const struct sockaddr * addr,unsigned flags)116 static void sv_recv_cb(uv_udp_t* handle,
117 ssize_t nread,
118 const uv_buf_t* rcvbuf,
119 const struct sockaddr* addr,
120 unsigned flags) {
121 uv_udp_send_t* req;
122 uv_buf_t sndbuf;
123 int r;
124
125 if (nread < 0) {
126 ASSERT(0 && "unexpected error");
127 }
128
129 if (nread == 0) {
130 /* Returning unused buffer. Don't count towards sv_recv_cb_called */
131 ASSERT_NULL(addr);
132 return;
133 }
134
135 CHECK_HANDLE(handle);
136 ASSERT(flags == 0);
137
138 ASSERT_NOT_NULL(addr);
139 ASSERT(nread == 4);
140 ASSERT(!memcmp("PING", rcvbuf->base, nread));
141
142 /* FIXME? `uv_udp_recv_stop` does what it says: recv_cb is not called
143 * anymore. That's problematic because the read buffer won't be returned
144 * either... Not sure I like that but it's consistent with `uv_read_stop`.
145 */
146 r = uv_udp_recv_stop(handle);
147 ASSERT(r == 0);
148
149 req = malloc(sizeof *req);
150 ASSERT_NOT_NULL(req);
151
152 sndbuf = uv_buf_init("PONG", 4);
153 r = uv_udp_send(req, handle, &sndbuf, 1, addr, sv_send_cb);
154 ASSERT(r == 0);
155
156 sv_recv_cb_called++;
157 }
158
159
TEST_IMPL(udp_send_and_recv)160 TEST_IMPL(udp_send_and_recv) {
161 struct sockaddr_in addr;
162 uv_udp_send_t req;
163 uv_buf_t buf;
164 int r;
165
166 ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
167
168 r = uv_udp_init(uv_default_loop(), &server);
169 ASSERT(r == 0);
170
171 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
172 ASSERT(r == 0);
173
174 r = uv_udp_recv_start(&server, alloc_cb, sv_recv_cb);
175 ASSERT(r == 0);
176
177 ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
178
179 r = uv_udp_init(uv_default_loop(), &client);
180 ASSERT(r == 0);
181
182 /* client sends "PING", expects "PONG" */
183 buf = uv_buf_init("PING", 4);
184
185 r = uv_udp_send(&req,
186 &client,
187 &buf,
188 1,
189 (const struct sockaddr*) &addr,
190 cl_send_cb);
191 ASSERT(r == 0);
192
193 ASSERT(close_cb_called == 0);
194 ASSERT(cl_send_cb_called == 0);
195 ASSERT(cl_recv_cb_called == 0);
196 ASSERT(sv_send_cb_called == 0);
197 ASSERT(sv_recv_cb_called == 0);
198
199 uv_run(uv_default_loop(), UV_RUN_DEFAULT);
200
201 ASSERT(cl_send_cb_called == 1);
202 ASSERT(cl_recv_cb_called == 1);
203 ASSERT(sv_send_cb_called == 1);
204 ASSERT(sv_recv_cb_called == 1);
205 ASSERT(close_cb_called == 2);
206
207 ASSERT(client.send_queue_size == 0);
208 ASSERT(server.send_queue_size == 0);
209
210 MAKE_VALGRIND_HAPPY();
211 return 0;
212 }
213