[PATCH v2 4/9] net: dhcp: make grub_net_process_dhcp take an interface

[Andre Przywara]

From: Andrei Borzenkov <address@hidden>

Change the interface of the function dealing with incoming BOOTP packets
to take an interface instead of a card, to allow more fine per-interface
state (timeout, handshake state) later on.

Signed-off-by: Andre Przywara <address@hidden>
---
 grub-core/net/bootp.c | 29 ++++++++++++++++-------------
 grub-core/net/ip.c    |  2 +-
 include/grub/net.h    |  2 +-
 3 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index fd56de907..573398aa4 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -396,12 +396,19 @@ out:
   return err;
 }
 
+/*
+ * This is called directly from net/ip.c:handle_dgram(), because those
+ * BOOTP/DHCP packets are a bit special due to their improper
+ * sender/receiver IP fields.
+ */
 void
 grub_net_process_dhcp (struct grub_net_buff *nb,
-                      struct grub_net_card *card)
+                      struct grub_net_network_level_interface *iface)
 {
   char *name;
-  struct grub_net_network_level_interface *inf;
+  struct grub_net_card *card = iface->card;
+  const struct grub_net_bootp_packet *bp = (const struct grub_net_bootp_packet 
*) nb->data;
+  grub_size_t size = nb->tail - nb->data;
 
   name = grub_xasprintf ("%s:dhcp", card->name);
   if (!name)
@@ -409,22 +416,18 @@ grub_net_process_dhcp (struct grub_net_buff *nb,
       grub_print_error ();
       return;
     }
-  grub_net_configure_by_dhcp_ack (name, card,
-                                 0, (const struct grub_net_bootp_packet *) 
nb->data,
-                                 (nb->tail - nb->data), 0, 0, 0);
+  grub_net_configure_by_dhcp_ack (name, card, 0, bp, size, 0, 0, 0);
   grub_free (name);
   if (grub_errno)
     grub_print_error ();
   else
     {
-      FOR_NET_NETWORK_LEVEL_INTERFACES(inf)
-       if (grub_memcmp (inf->name, card->name, grub_strlen (card->name)) == 0
-           && grub_memcmp (inf->name + grub_strlen (card->name),
-                           ":dhcp_tmp", sizeof (":dhcp_tmp") - 1) == 0)
-         {
-           grub_net_network_level_interface_unregister (inf);
-           break;
-         }
+      if (grub_memcmp (iface->name, card->name, grub_strlen (card->name)) == 0
+         && grub_memcmp (iface->name + grub_strlen (card->name),
+                         ":dhcp_tmp", sizeof (":dhcp_tmp") - 1) == 0)
+       {
+         grub_net_network_level_interface_unregister (iface);
+       }
     }
 }
 
diff --git a/grub-core/net/ip.c b/grub-core/net/ip.c
index 7c95cc746..ea5edf8f1 100644
--- a/grub-core/net/ip.c
+++ b/grub-core/net/ip.c
@@ -279,7 +279,7 @@ handle_dgram (struct grub_net_buff *nb,
              && grub_memcmp (inf->hwaddress.mac, &bootp->mac_addr,
                              sizeof (inf->hwaddress.mac)) == 0)
            {
-             grub_net_process_dhcp (nb, inf->card);
+             grub_net_process_dhcp (nb, inf);
              grub_netbuff_free (nb);
              return GRUB_ERR_NONE;
            }
diff --git a/include/grub/net.h b/include/grub/net.h
index 0c7286bd2..3f649d753 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -475,7 +475,7 @@ grub_net_add_ipv4_local (struct 
grub_net_network_level_interface *inf,
 
 void
 grub_net_process_dhcp (struct grub_net_buff *nb,
-                      struct grub_net_card *card);
+                      struct grub_net_network_level_interface *iface);
 
 int
 grub_net_hwaddr_cmp (const grub_net_link_level_address_t *a,
-- 
2.17.1