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ethernet: print faster speeds in Gbit/s

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As a special case, for 2500 Mbit/s, we display “2.5 Gbit/s”.

For other speeds over 1000 Mbit/s, we print “10 Gbit/s”,
“25 Gbit/s” or “100 Gbit/s”.
This commit is contained in:
Michael Stapelberg 2022-09-04 12:42:35 +02:00
parent c1e9069aa1
commit d5e1d58ae0
1 changed files with 7 additions and 0 deletions
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7
src/print_eth_info.c
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@ -46,6 +46,13 @@ static int print_eth_speed(char *outwalk, const char *interface) {
(void)strcpy(ifr.ifr_name, interface);
if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0) {
ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ethtool_cmd_speed(&ecmd));
if (ethspeed == 2500) {
// 2.5 Gbit/s is the only case where floating point formatting is most
// common.
return sprintf(outwalk, "%.1f Gbit/s", (double)ethspeed / 1000);
} else if (ethspeed > 1000) {
return sprintf(outwalk, "%d Gbit/s", ethspeed / 1000);
}
return sprintf(outwalk, "%d Mbit/s", ethspeed);
} else
return sprintf(outwalk, "?");