回答編集履歴
1
udp
answer
CHANGED
|
@@ -18,4 +18,23 @@
|
|
|
18
18
|
Ncat: Listening on 0.0.0.0:22222
|
|
19
19
|
Ncat: Connection from 127.0.0.1.
|
|
20
20
|
Ncat: Connection from 127.0.0.1:11111.
|
|
21
|
-
```
|
|
21
|
+
```
|
|
22
|
+
|
|
23
|
+
----
|
|
24
|
+
|
|
25
|
+
あ、UDP でしたね。
|
|
26
|
+
|
|
27
|
+
```php
|
|
28
|
+
<?php
|
|
29
|
+
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
|
|
30
|
+
socket_bind($socket, "0.0.0.0", 11111) or die();
|
|
31
|
+
socket_sendto($socket, "123", 3, 0, "127.0.0.1", 22222);
|
|
32
|
+
```
|
|
33
|
+
|
|
34
|
+
```
|
|
35
|
+
$ sudo tcpdump -i lo -nn port 11111
|
|
36
|
+
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
|
|
37
|
+
listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes
|
|
38
|
+
|
|
39
|
+
19:50:53.201765 IP 127.0.0.1.11111 > 127.0.0.1.22222: UDP, length 3
|
|
40
|
+
```
|