feat: init commit

README.md

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+# Ring
+
+Ring is the ping but with Rust, rust + ping -> ring, implement by `pnet`, `socket2` and `signal-hook`.
+
+## Build
+
+```bash
+cargo build
+```
+
+## Usage
+
+```
+Usage: ring [OPTIONS] <DESTINATION>
+
+Arguments:
+  <DESTINATION>  Ping destination, ip or domain
+
+Options:
+  -c <COUNT>            Count of ping times [default: 4]
+  -s <PACKET_SIZE>      Ping packet size [default: 64]
+  -t <TTL>              Ping ttl [default: 64]
+  -w <TIMEOUT>          Ping timeout seconds [default: 1]
+  -i <INTERVAL>         Ping interval duration milliseconds [default: 1000]
+  -h, --help            Print help information
+  -V, --version         Print version information
+```
+
+ping a ip address.
+
+```bash
+cargo run 8.8.8.8
+```
+
+ping a domain
+```bash
+cargo run www.github.com
+```
+
+ping and interrupt by Crtl+C
+```bash
+cargo run 8.8.8.8 -c 10
+
+PING 8.8.8.8(8.8.8.8)
+64 bytes from 8.8.8.8: icmp_seq=1 ttl=64 time=4.32ms
+64 bytes from 8.8.8.8: icmp_seq=2 ttl=64 time=3.02ms
+64 bytes from 8.8.8.8: icmp_seq=3 ttl=64 time=3.24ms
+^CReceive signal 2
+
+--- 8.8.8.8 ping statistics ---
+3 packets transmitted, 3 received, 0% packet loss, time 2365.104ms
+```