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net/dhcp: Add explicit net_dhcp command 

Mostly for cosmetic reasons, we add a "net_dhcp" command, which is (at the
moment) identical to the existing "net_bootp" command. Both actually trigger
a DHCP handshake now, and both should be able to deal with pure BOOTP servers.
We could think about dropping the DHCP options from the initial DISCOVER packet
when the user issues the net_bootp command, but it's unclear whether this is
really useful, as both protocols should be able to coexist.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Andrei Borzenkov 2019-03-07 15:14:16 +00:00 committed by Daniel Kiper
parent 5a4f9d5c04
commit 5bc41db756
1 changed files with 5 additions and 1 deletions
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6
grub-core/net/bootp.c
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@ -864,7 +864,7 @@ grub_cmd_bootp (struct grub_command *cmd __attribute__ ((unused)),
return err;
}
static grub_command_t cmd_getdhcp, cmd_bootp;
static grub_command_t cmd_getdhcp, cmd_bootp, cmd_dhcp;
void
grub_bootp_init (void)
@ -872,6 +872,9 @@ grub_bootp_init (void)
cmd_bootp = grub_register_command ("net_bootp", grub_cmd_bootp,
N_("[CARD]"),
N_("perform a bootp autoconfiguration"));
cmd_dhcp = grub_register_command ("net_dhcp", grub_cmd_bootp,
N_("[CARD]"),
N_("perform a DHCP autoconfiguration"));
cmd_getdhcp = grub_register_command ("net_get_dhcp_option", grub_cmd_dhcpopt,
N_("VAR INTERFACE NUMBER DESCRIPTION"),
N_("retrieve DHCP option and save it into VAR. If VAR is - then print the value."));
@ -882,4 +885,5 @@ grub_bootp_fini (void)
{
grub_unregister_command (cmd_getdhcp);
grub_unregister_command (cmd_bootp);
grub_unregister_command (cmd_dhcp);
}