Talk:Path MTU Discovery

Latest comment: 6 years ago by Alexis Wilke in topic SIOCGIFMTU

third paragraph

edit

In the third paragraph you can read:

"Conversely, if PMTUD finds that the path allows a smaller MTU than what is possible on the lower"

IMHO that's wrong, it shoud say:

"Conversely, if PMTUD finds that the path allows a larger MTU than what is possible on the lower"

Furthermore, the whole paragraph is a bit confusing, so I propose to change it if you agree with me.

Greets! —Preceding unsigned comment added by 83.37.187.250 (talkcontribs)

SIOCGIFMTU

edit

Would it make sense to mention the fact that it is possible to retreive the size of the MTU on a socket using the ioctl() command as in[1]:

       struct ifreq ifr;
       memset(&ifr, 0, sizeof(ifr));
       strcpy(ifr.ifr_name, "eth0");
       if(ioctl(sock, SIOCGIFMTU, &ifr) == 0)
       {
           int mtu_size = ifr.ifr_mtu;
           ...
       }

Alexis Wilke (talk) 09:37, 30 May 2018 (UTC)Reply

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