From: Paulo Flabiano Smorigo <pfsmor...@br.ibm.com>
This patch sets a net_<interface>_clientid and net_<interface>_clientuuid
GRUB environment variables, using the DHCP client ID and UUID options if
these are found.
In the same way than net_<interface>_<option> variables are set for other
options such domain name, boot file, next server, etc.
Signed-off-by: Paulo Flabiano Smorigo <pfsmor...@br.ibm.com>
Signed-off-by: Javier Martinez Canillas <javi...@redhat.com>
Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>
---
Changes in v2:
- Use the existing grub_env_set_net_property() and remove duplicated code.
grub-core/net/bootp.c | 48 +++++++++++++++++++++++++++++++++++--------
include/grub/net.h | 2 ++
2 files changed, 42 insertions(+), 8 deletions(-)
diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 04cfbb04504..377006da938 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -95,6 +95,14 @@ enum
/* Max timeout when waiting for BOOTP/DHCP reply */
#define GRUB_DHCP_MAX_PACKET_TIMEOUT 32
+static char
+hexdigit (grub_uint8_t val)
+{
+ if (val < 10)
+ return val + '0';
+ return val + 'a' - 10;
+}
+
static const void *
find_dhcp_option (const struct grub_net_bootp_packet *bp, grub_size_t size,
grub_uint8_t opt_code, grub_uint8_t *opt_len)
@@ -152,6 +160,9 @@ again:
if (i + taglength >= size)
return NULL;
+ grub_dprintf("net", "DHCP option %u (0x%02x) found with length %u.\n",
+ tagtype, tagtype, taglength);
+
/* FIXME RFC 3396 options concatentation */
if (tagtype == opt_code)
{
@@ -406,6 +417,35 @@ grub_net_configure_by_dhcp_ack (const char *name,
if (opt && opt_len)
grub_env_set_net_property (name, "extensionspath", (const char *) opt,
opt_len);
+ opt = find_dhcp_option (bp, size, GRUB_NET_BOOTP_CLIENT_ID, &opt_len);
+ if (opt && opt_len)
+ grub_env_set_net_property (name, "clientid", (const char *) opt, opt_len);
+
+ opt = find_dhcp_option (bp, size, GRUB_NET_BOOTP_CLIENT_UUID, &opt_len);
+ if (opt && opt_len == 17)
+ {
+ /* The format is 9cfe245e-d0c8-bd45-a79f-54ea5fbd3d97 */
+
+ opt += 1;
+ opt_len -= 1;
+
+ char *val = grub_malloc (2 * opt_len + 4 + 1);
+ int i = 0;
+ int j = 0;
+ for (i = 0; i < opt_len; i++)
+ {
+ val[2 * i + j] = hexdigit (opt[i] >> 4);
+ val[2 * i + 1 + j] = hexdigit (opt[i] & 0xf);
+
+ if ((i == 3) || (i == 5) || (i == 7) || (i == 9))
+ {
+ j++;
+ val[2 * i + 1+ j] = '-';
+ }
+ }
+ grub_env_set_net_property (name, "clientuuid", (char *) val, 2 * opt_len
+ 4);
+ }
+
inter->dhcp_ack = grub_malloc (size);
if (inter->dhcp_ack)
{
@@ -631,14 +671,6 @@ grub_net_process_dhcp (struct grub_net_buff *nb,
}
}
-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 4a9069a1474..556c54e579f 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -462,6 +462,8 @@ enum
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_DHCP_REQUESTED_IP_ADDRESS = 50,
GRUB_NET_DHCP_OVERLOAD = 52,
GRUB_NET_DHCP_MESSAGE_TYPE = 53,
--
2.21.0
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