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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
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Date: Tue, 27 Nov 2012 17:18:53 -0200
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Subject: [PATCH] DHCP client ID and UUID options added.
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---
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grub-core/net/bootp.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++-----
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include/grub/net.h | 2 ++
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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
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index 9e2fdb795f5..f03eeab2fb4 100644
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--- a/grub-core/net/bootp.c
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+++ b/grub-core/net/bootp.c
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@@ -25,6 +25,49 @@
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#include <grub/net/udp.h>
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#include <grub/datetime.h>
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+static char *
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+grub_env_write_readonly (struct grub_env_var *var __attribute__ ((unused)),
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+ const char *val __attribute__ ((unused)))
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+{
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+ return NULL;
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+}
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+
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+static void
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+set_env_limn_ro (const char *intername, const char *suffix,
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+ const char *value, grub_size_t len)
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+{
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+ char *varname, *varvalue;
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+ char *ptr;
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+ varname = grub_xasprintf ("net_%s_%s", intername, suffix);
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+ if (!varname)
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+ return;
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+ for (ptr = varname; *ptr; ptr++)
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+ if (*ptr == ':')
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+ *ptr = '_';
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+ varvalue = grub_malloc (len + 1);
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+ if (!varvalue)
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+ {
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+ grub_free (varname);
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+ return;
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+ }
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+
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+ grub_memcpy (varvalue, value, len);
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+ varvalue[len] = 0;
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+ grub_env_set (varname, varvalue);
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+ grub_register_variable_hook (varname, 0, grub_env_write_readonly);
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+ grub_env_export (varname);
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+ grub_free (varname);
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+ grub_free (varvalue);
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+}
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+
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+static char
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+hexdigit (grub_uint8_t val)
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+{
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+ if (val < 10)
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+ return val + '0';
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+ return val + 'a' - 10;
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+}
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+
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static void
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parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
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{
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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++;
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+ grub_dprintf("net", "DHCP option %u (0x%02x) found with length %u.\n",
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+ tagtype, tagtype, taglength);
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+
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switch (tagtype)
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{
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case GRUB_NET_BOOTP_NETMASK:
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@@ -120,6 +166,39 @@ parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
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taglength);
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break;
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+ case GRUB_NET_BOOTP_CLIENT_ID:
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+ set_env_limn_ro (name, "clientid", (char *) ptr, taglength);
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+ break;
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+
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+ case GRUB_NET_BOOTP_CLIENT_UUID:
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+ {
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+ if (taglength != 17)
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+ break;
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+
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+ /* The format is 9cfe245e-d0c8-bd45-a79f-54ea5fbd3d97 */
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+
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+ ptr += 1;
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+ taglength -= 1;
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+
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+ char *val = grub_malloc (2 * taglength + 4 + 1);
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+ int i = 0;
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+ int j = 0;
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+ for (i = 0; i < taglength; i++)
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+ {
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+ val[2 * i + j] = hexdigit (ptr[i] >> 4);
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+ val[2 * i + 1 + j] = hexdigit (ptr[i] & 0xf);
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+
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+ if ((i == 3) || (i == 5) || (i == 7) || (i == 9))
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+ {
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+ j++;
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+ val[2 * i + 1+ j] = '-';
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+ }
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+ }
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+
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+ set_env_limn_ro (name, "clientuuid", (char *) val, 2 * taglength + 4);
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+ }
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+ break;
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+
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/* If you need any other options please contact GRUB
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development team. */
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}
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@@ -302,14 +381,6 @@ grub_net_process_dhcp (struct grub_net_buff *nb,
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}
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}
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-static char
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-hexdigit (grub_uint8_t val)
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-{
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- if (val < 10)
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- return val + '0';
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- return val + 'a' - 10;
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-}
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-
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static grub_err_t
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grub_cmd_dhcpopt (struct grub_command *cmd __attribute__ ((unused)),
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int argc, char **args)
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diff --git a/include/grub/net.h b/include/grub/net.h
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index 1096b24322e..e266bae23f4 100644
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--- a/include/grub/net.h
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+++ b/include/grub/net.h
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@@ -457,6 +457,8 @@ enum
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GRUB_NET_BOOTP_DOMAIN = 0x0f,
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GRUB_NET_BOOTP_ROOT_PATH = 0x11,
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GRUB_NET_BOOTP_EXTENSIONS_PATH = 0x12,
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+ GRUB_NET_BOOTP_CLIENT_ID = 0x3d,
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+ GRUB_NET_BOOTP_CLIENT_UUID = 0x61,
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GRUB_NET_BOOTP_END = 0xff
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};
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