grub2/0077-DHCP-client-ID-and-UUID-options-added.patch

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From 8a0b654a520e407da69e0cf64f3dd6bb7cf86240 Mon Sep 17 00:00:00 2001
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From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
Date: Tue, 27 Nov 2012 17:18:53 -0200
Subject: [PATCH 077/229] DHCP client ID and UUID options added.
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---
grub-core/net/bootp.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++-----
include/grub/net.h | 2 ++
2 files changed, 81 insertions(+), 8 deletions(-)
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diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 9e2fdb795f5..f03eeab2fb4 100644
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--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -25,6 +25,49 @@
#include <grub/net/udp.h>
#include <grub/datetime.h>
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+static char *
+grub_env_write_readonly (struct grub_env_var *var __attribute__ ((unused)),
+ const char *val __attribute__ ((unused)))
+{
+ return NULL;
+}
+
+static void
+set_env_limn_ro (const char *intername, const char *suffix,
+ const char *value, grub_size_t len)
+{
+ char *varname, *varvalue;
+ char *ptr;
+ varname = grub_xasprintf ("net_%s_%s", intername, suffix);
+ if (!varname)
+ return;
+ for (ptr = varname; *ptr; ptr++)
+ if (*ptr == ':')
+ *ptr = '_';
+ varvalue = grub_malloc (len + 1);
+ if (!varvalue)
+ {
+ grub_free (varname);
+ return;
+ }
+
+ grub_memcpy (varvalue, value, len);
+ varvalue[len] = 0;
+ grub_env_set (varname, varvalue);
+ grub_register_variable_hook (varname, 0, grub_env_write_readonly);
+ grub_env_export (varname);
+ grub_free (varname);
+ grub_free (varvalue);
+}
+
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+static char
+hexdigit (grub_uint8_t val)
+{
+ if (val < 10)
+ return val + '0';
+ return val + 'a' - 10;
+}
+
static void
parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
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{
@@ -55,6 +98,9 @@ parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
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taglength = *ptr++;
+ grub_dprintf("net", "DHCP option %u (0x%02x) found with length %u.\n",
+ tagtype, tagtype, taglength);
+
switch (tagtype)
{
case GRUB_NET_BOOTP_NETMASK:
@@ -120,6 +166,39 @@ parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
taglength);
break;
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+ case GRUB_NET_BOOTP_CLIENT_ID:
+ set_env_limn_ro (name, "clientid", (char *) ptr, taglength);
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+ break;
+
+ case GRUB_NET_BOOTP_CLIENT_UUID:
+ {
+ if (taglength != 17)
+ break;
+
+ /* The format is 9cfe245e-d0c8-bd45-a79f-54ea5fbd3d97 */
+
+ ptr += 1;
+ taglength -= 1;
+
+ char *val = grub_malloc (2 * taglength + 4 + 1);
+ int i = 0;
+ int j = 0;
+ for (i = 0; i < taglength; i++)
+ {
+ val[2 * i + j] = hexdigit (ptr[i] >> 4);
+ val[2 * i + 1 + j] = hexdigit (ptr[i] & 0xf);
+
+ if ((i == 3) || (i == 5) || (i == 7) || (i == 9))
+ {
+ j++;
+ val[2 * i + 1+ j] = '-';
+ }
+ }
+
+ set_env_limn_ro (name, "clientuuid", (char *) val, 2 * taglength + 4);
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+ }
+ break;
+
/* If you need any other options please contact GRUB
development team. */
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}
@@ -302,14 +381,6 @@ grub_net_process_dhcp (struct grub_net_buff *nb,
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}
}
-static char
-hexdigit (grub_uint8_t val)
-{
- if (val < 10)
- return val + '0';
- return val + 'a' - 10;
-}
-
static grub_err_t
grub_cmd_dhcpopt (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
diff --git a/include/grub/net.h b/include/grub/net.h
index 1096b24322e..e266bae23f4 100644
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--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -457,6 +457,8 @@ enum
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GRUB_NET_BOOTP_DOMAIN = 0x0f,
GRUB_NET_BOOTP_ROOT_PATH = 0x11,
GRUB_NET_BOOTP_EXTENSIONS_PATH = 0x12,
+ GRUB_NET_BOOTP_CLIENT_ID = 0x3d,
+ GRUB_NET_BOOTP_CLIENT_UUID = 0x61,
GRUB_NET_BOOTP_END = 0xff
};
--
2.15.0
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