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[PATCH 6/8] bootp: Add processing DHCPACK packet from HTTP Boot
From: |
Michael Chang |
Subject: |
[PATCH 6/8] bootp: Add processing DHCPACK packet from HTTP Boot |
Date: |
Wed, 3 Aug 2016 14:34:46 +0800 |
The vendor class identifier with the string "HTTPClient" is used to denote the
packet as responding to HTTP boot request. In DHCP4 config, the filename for
HTTP boot is the URL of the boot file while for PXE boot it is the path to the
boot file. As a consequence, the next-server becomes obseleted because the HTTP
URL already contains the server address for the boot file. For DHCP6 config,
there's no difference definition in existing config as dhcp6.bootfile-url can
be used to specify URL for both HTTP and PXE boot file.
This patch adds processing for "HTTPClient" vendor class identifier in DHCPACK
packet by treating it as HTTP format, not as the PXE format.
Signed-off-by: Michael Chang <address@hidden>
Signed-off-by: Ken Lin <address@hidden>
---
grub-core/net/bootp.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++--
include/grub/net.h | 1 +
2 files changed, 66 insertions(+), 2 deletions(-)
diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 81173b4..04f9f3d 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -207,6 +207,11 @@ parse_dhcp_vendor (const char *name, const void *vend, int
limit, int *mask)
taglength);
break;
+ case GRUB_NET_BOOTP_VENDOR_CLASS_IDENTIFIER:
+ grub_env_set_net_property (name, "vendor_class_identifier", (const
char *) ptr,
+ taglength);
+ break;
+
case GRUB_NET_BOOTP_EXTENSIONS_PATH:
grub_env_set_net_property (name, "extensionspath", (const char *)
ptr,
taglength);
@@ -281,6 +286,66 @@ grub_net_configure_by_dhcp_ack (const char *name,
}
#endif
+ if (size > OFFSET_OF (vendor, bp))
+ {
+ char *cidvar;
+ const char *cid;
+
+ parse_dhcp_vendor (name, &bp->vendor, size - OFFSET_OF (vendor, bp),
&mask);
+ cidvar = grub_xasprintf ("net_%s_%s", name, "vendor_class_identifier");
+ cid = grub_env_get (cidvar);
+ grub_free (cidvar);
+
+ if (cid && grub_strcmp (cid, "HTTPClient") == 0)
+ {
+ char *proto, *ip, *pa;
+
+ if (!dissect_url (bp->boot_file, &proto, &ip, &pa))
+ return inter;
+
+ grub_env_set_net_property (name, "boot_file", pa, grub_strlen (pa));
+ if (is_def)
+ {
+ grub_net_default_server = grub_strdup (ip);
+ grub_env_set ("net_default_interface", name);
+ grub_env_export ("net_default_interface");
+ }
+ if (device && !*device)
+ {
+ *device = grub_xasprintf ("%s,%s", proto, ip);
+ grub_print_error ();
+ }
+ if (path)
+ {
+ *path = grub_strdup (pa);
+ grub_print_error ();
+ if (*path)
+ {
+ char *slash;
+ slash = grub_strrchr (*path, '/');
+ if (slash)
+ *slash = 0;
+ else
+ **path = 0;
+ }
+ }
+ grub_net_add_ipv4_local (inter, mask);
+ inter->dhcp_ack = grub_malloc (size);
+ if (inter->dhcp_ack)
+ {
+ grub_memcpy (inter->dhcp_ack, bp, size);
+ inter->dhcp_acklen = size;
+ }
+ else
+ grub_errno = GRUB_ERR_NONE;
+
+ grub_free (proto);
+ grub_free (ip);
+ grub_free (pa);
+ return inter;
+ }
+ }
+
if (size > OFFSET_OF (boot_file, bp))
grub_env_set_net_property (name, "boot_file", bp->boot_file,
sizeof (bp->boot_file));
@@ -342,8 +407,6 @@ grub_net_configure_by_dhcp_ack (const char *name,
**path = 0;
}
}
- if (size > OFFSET_OF (vendor, bp))
- parse_dhcp_vendor (name, &bp->vendor, size - OFFSET_OF (vendor, bp),
&mask);
grub_net_add_ipv4_local (inter, mask);
inter->dhcp_ack = grub_malloc (size);
diff --git a/include/grub/net.h b/include/grub/net.h
index 38a3973..e4bf678 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -517,6 +517,7 @@ enum
GRUB_NET_BOOTP_DOMAIN = 0x0f,
GRUB_NET_BOOTP_ROOT_PATH = 0x11,
GRUB_NET_BOOTP_EXTENSIONS_PATH = 0x12,
+ GRUB_NET_BOOTP_VENDOR_CLASS_IDENTIFIER = 0x3C,
GRUB_NET_BOOTP_END = 0xff
};
--
2.6.6
- Patches to support UEFI HTTP Boot IPv4 and IPv6, Michael Chang, 2016/08/03
- [PATCH 1/8] misc: fix invalid character recongition in strto*l, Michael Chang, 2016/08/03
- [PATCH 2/8] net: read bracketed ipv6 addrs and port numbers, Michael Chang, 2016/08/03
- [PATCH 4/8] efinet: UEFI IPv6 PXE support, Michael Chang, 2016/08/03
- [PATCH 5/8] grub.texi: Add net_bootp6 doument, Michael Chang, 2016/08/03
- [PATCH 6/8] bootp: Add processing DHCPACK packet from HTTP Boot,
Michael Chang <=
- [PATCH 7/8] efinet: Setting network from UEFI device path, Michael Chang, 2016/08/03
- [PATCH 8/8] efinet: Setting DNS server from UEFI protocol, Michael Chang, 2016/08/03
- [PATCH 3/8] bootp: New net_bootp6 command, Michael Chang, 2016/08/03