evping

If you are impatient and not interested in the full story, here is the download button:

https://github.com/rcarbone/evping

Please, make sure you have the autotools installed.

   1> cd evping
   2> sh add-ping.sh
   3> cd libevent/sample
   4> sudo ./eping tecsiel.it libevent.org

      Warning:
        You need super-user permissions to run the example program because
        using a raw socket for ICMP calls is a privileged operation.

The project is named evping, that is a hack to the libevent in order to add the ping protocol in a way very similar to the DNS protocol.

evping, like fping and on the contrary of the traditional ping, supports any number of targets on the command line.

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Hi libeventers, looking across my dead file systems I recently discovered an old project I was working on in 2009. These days I was just so curious to understand how difficult is to add a new protocol module to the libevent source tree.

The code was originally wrote for libevent 2.0.X-alpha series I think, but I recently ported it compile and use the latest libevent available from github repository.

What I did to add the ping protocol

1. wrote ping.h containing the ping protocol definitions
2. wrote evping.c containing the ping protocol implementation
3. wrote evping.h as final user include file
4. wrote eping.c as a programming example to put in sample/
5. wrote this README
6. wrote the shell script add-ping.sh in the effort to help you while patching your own copy of libevent

What I missed

1. regress_ping.c regression test program
2. documentation

Example

rocco@home 14> sudo ./eping tecsiel.it libevent.org
#2 hosts being pinged
PING ns.tecsiel.it (78.47.99.151) 68(96) bytes of data.
PING pages.github.com (192.30.252.153) 68(96) bytes of data.
76 bytes from ns.tecsiel.it (78.47.99.151): icmp_seq=1 ttl=46 time=53.788 ms
76 bytes from pages.github.com (192.30.252.153): icmp_seq=1 ttl=53 time=134.062 ms
76 bytes from ns.tecsiel.it (78.47.99.151): icmp_seq=2 ttl=46 time=52.884 ms
76 bytes from pages.github.com (192.30.252.153): icmp_seq=2 ttl=53 time=130.321 ms
76 bytes from ns.tecsiel.it (78.47.99.151): icmp_seq=3 ttl=46 time=52.660 ms
76 bytes from pages.github.com (192.30.252.153): icmp_seq=3 ttl=53 time=130.878 ms
76 bytes from ns.tecsiel.it (78.47.99.151): icmp_seq=4 ttl=46 time=53.101 ms
76 bytes from pages.github.com (192.30.252.153): icmp_seq=4 ttl=53 time=130.950 ms
76 bytes from ns.tecsiel.it (78.47.99.151): icmp_seq=5 ttl=46 time=54.059 ms
76 bytes from pages.github.com (192.30.252.153): icmp_seq=5 ttl=53 time=149.782 ms
76 bytes from ns.tecsiel.it (78.47.99.151): icmp_seq=6 ttl=46 time=53.019 ms
^C
--- ns.tecsiel.it ping statistics ---
6 packets transmitted, 6 received, 0.00% packet loss, time 319.5ms
rtt min/avg/max/sdev = 52.660/53.252/54.059/0.548 ms

--- pages.github.com ping statistics ---
5 packets transmitted, 5 received, 0.00% packet loss, time 676.0ms
rtt min/avg/max/sdev = 130.321/135.199/149.782/8.284 ms