File 0008-efinet-Setting-DNS-server-from-UEFI-protocol.patch of Package grub2.9582
From 0c7ae6d7527d08e54a6eeebddb6c5c697c4b37d2 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Thu, 14 Jul 2016 17:48:45 +0800
Subject: [PATCH 8/8] efinet: Setting DNS server from UEFI protocol
In the URI device path node, any name rahter than address can be used for
looking up the resources so that DNS service become needed to get answer of the
name's address. Unfortunately the DNS is not defined in any of the device path
nodes so that we use the EFI_IP4_CONFIG2_PROTOCOL and EFI_IP6_CONFIG_PROTOCOL
to obtain it.
These two protcols are defined the sections of UEFI specification.
27.5 EFI IPv4 Configuration II Protocol
27.7 EFI IPv6 Configuration Protocol
include/grub/efi/api.h:
Add new structure and protocol UUID of EFI_IP4_CONFIG2_PROTOCOL and
EFI_IP6_CONFIG_PROTOCOL.
grub-core/net/drivers/efi/efinet.c:
Use the EFI_IP4_CONFIG2_PROTOCOL and EFI_IP6_CONFIG_PROTOCOL to obtain the list
of DNS server address for IPv4 and IPv6 respectively. The address of DNS
servers is structured into DHCPACK packet and feed into the same DHCP packet
processing functions to ensure the network interface is setting up the same way
it used to be.
Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Ken Lin <ken.lin@hpe.com>
V2:
* Fix DNS device path parsing for efinet device
---
grub-core/net/drivers/efi/efinet.c | 163 +++++++++++++++++++++++++++++++++++++
include/grub/efi/api.h | 76 +++++++++++++++++
2 files changed, 239 insertions(+)
Index: grub-2.02/grub-core/net/drivers/efi/efinet.c
===================================================================
--- grub-2.02.orig/grub-core/net/drivers/efi/efinet.c
+++ grub-2.02/grub-core/net/drivers/efi/efinet.c
@@ -30,6 +30,8 @@ GRUB_MOD_LICENSE ("GPLv3+");
/* GUID. */
static grub_efi_guid_t net_io_guid = GRUB_EFI_SIMPLE_NETWORK_GUID;
static grub_efi_guid_t pxe_io_guid = GRUB_EFI_PXE_GUID;
+static grub_efi_guid_t ip4_config_guid = GRUB_EFI_IP4_CONFIG2_PROTOCOL_GUID;
+static grub_efi_guid_t ip6_config_guid = GRUB_EFI_IP6_CONFIG_PROTOCOL_GUID;
static grub_err_t
send_card_buffer (struct grub_net_card *dev,
@@ -325,6 +327,125 @@ grub_efinet_findcards (void)
grub_free (handles);
}
+static grub_efi_handle_t
+grub_efi_locate_device_path (grub_efi_guid_t *protocol, grub_efi_device_path_t *device_path,
+ grub_efi_device_path_t **r_device_path)
+{
+ grub_efi_handle_t handle;
+ grub_efi_status_t status;
+
+ status = efi_call_3 (grub_efi_system_table->boot_services->locate_device_path,
+ protocol, &device_path, &handle);
+
+ if (status != GRUB_EFI_SUCCESS)
+ return 0;
+
+ if (r_device_path)
+ *r_device_path = device_path;
+
+ return handle;
+}
+
+static grub_efi_ipv4_address_t *
+grub_dns_server_ip4_address (grub_efi_device_path_t *dp, grub_efi_uintn_t *num_dns)
+{
+ grub_efi_handle_t hnd;
+ grub_efi_status_t status;
+ grub_efi_ip4_config2_protocol_t *conf;
+ grub_efi_ipv4_address_t *addrs;
+ grub_efi_uintn_t data_size = 1 * sizeof (grub_efi_ipv4_address_t);
+
+ hnd = grub_efi_locate_device_path (&ip4_config_guid, dp, NULL);
+
+ if (!hnd)
+ return 0;
+
+ conf = grub_efi_open_protocol (hnd, &ip4_config_guid,
+ GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+ if (!conf)
+ return 0;
+
+ addrs = grub_malloc (data_size);
+ if (!addrs)
+ return 0;
+
+ status = efi_call_4 (conf->get_data, conf,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_DNSSERVER,
+ &data_size, addrs);
+
+ if (status == GRUB_EFI_BUFFER_TOO_SMALL)
+ {
+ grub_free (addrs);
+ addrs = grub_malloc (data_size);
+ if (!addrs)
+ return 0;
+
+ status = efi_call_4 (conf->get_data, conf,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_DNSSERVER,
+ &data_size, addrs);
+ }
+
+ if (status != GRUB_EFI_SUCCESS)
+ {
+ grub_free (addrs);
+ return 0;
+ }
+
+ *num_dns = data_size / sizeof (grub_efi_ipv4_address_t);
+ return addrs;
+}
+
+static grub_efi_ipv6_address_t *
+grub_dns_server_ip6_address (grub_efi_device_path_t *dp, grub_efi_uintn_t *num_dns)
+{
+ grub_efi_handle_t hnd;
+ grub_efi_status_t status;
+ grub_efi_ip6_config_protocol_t *conf;
+ grub_efi_ipv6_address_t *addrs;
+ grub_efi_uintn_t data_size = 1 * sizeof (grub_efi_ipv6_address_t);
+
+ hnd = grub_efi_locate_device_path (&ip6_config_guid, dp, NULL);
+
+ if (!hnd)
+ return 0;
+
+ conf = grub_efi_open_protocol (hnd, &ip6_config_guid,
+ GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+
+ if (!conf)
+ return 0;
+
+ addrs = grub_malloc (data_size);
+ if (!addrs)
+ return 0;
+
+ status = efi_call_4 (conf->get_data, conf,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_DNSSERVER,
+ &data_size, addrs);
+
+ if (status == GRUB_EFI_BUFFER_TOO_SMALL)
+ {
+ grub_free (addrs);
+ addrs = grub_malloc (data_size);
+ if (!addrs)
+ return 0;
+
+ status = efi_call_4 (conf->get_data, conf,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_DNSSERVER,
+ &data_size, addrs);
+ }
+
+ if (status != GRUB_EFI_SUCCESS)
+ {
+ grub_free (addrs);
+ return 0;
+ }
+
+ *num_dns = data_size / sizeof (grub_efi_ipv6_address_t);
+ return addrs;
+}
+
static struct grub_net_buff *
grub_efinet_create_dhcp_ack_from_device_path (grub_efi_device_path_t *dp, int *use_ipv6)
{
@@ -360,6 +481,17 @@ grub_efinet_create_dhcp_ack_from_device_
ldp = grub_efi_find_last_device_path (ddp);
+ /* Skip the DNS Device */
+ if (GRUB_EFI_DEVICE_PATH_TYPE (ldp) == GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE
+ && GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) == GRUB_EFI_DNS_DEVICE_PATH_SUBTYPE)
+ {
+ ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
+ ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
+ ldp->length = sizeof (*ldp);
+
+ ldp = grub_efi_find_last_device_path (ddp);
+ }
+
if (GRUB_EFI_DEVICE_PATH_TYPE (ldp) != GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE
|| (GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) != GRUB_EFI_IPV4_DEVICE_PATH_SUBTYPE
&& GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) != GRUB_EFI_IPV6_DEVICE_PATH_SUBTYPE))
@@ -377,6 +509,8 @@ grub_efinet_create_dhcp_ack_from_device_
grub_efi_ipv4_device_path_t *ipv4 = (grub_efi_ipv4_device_path_t *) ldp;
struct grub_net_bootp_packet *bp;
grub_uint8_t *ptr;
+ grub_efi_ipv4_address_t *dns;
+ grub_efi_uintn_t num_dns;
bp = (struct grub_net_bootp_packet *) nb->tail;
err = grub_netbuff_put (nb, sizeof (*bp) + 4);
@@ -438,6 +572,25 @@ grub_efinet_create_dhcp_ack_from_device_
*ptr++ = sizeof ("HTTPClient") - 1;
grub_memcpy (ptr, "HTTPClient", sizeof ("HTTPClient") - 1);
+ dns = grub_dns_server_ip4_address (dp, &num_dns);
+ if (dns)
+ {
+ grub_efi_uintn_t size_dns = sizeof (*dns) * num_dns;
+
+ ptr = nb->tail;
+ err = grub_netbuff_put (nb, size_dns + 2);
+ if (err)
+ {
+ grub_free (ddp);
+ grub_netbuff_free (nb);
+ return NULL;
+ }
+ *ptr++ = GRUB_NET_BOOTP_DNS;
+ *ptr++ = size_dns;
+ grub_memcpy (ptr, dns, size_dns);
+ grub_free (dns);
+ }
+
ptr = nb->tail;
err = grub_netbuff_put (nb, 1);
if (err)
@@ -470,6 +623,8 @@ grub_efinet_create_dhcp_ack_from_device_
struct grub_net_dhcp6_option *opt;
struct grub_net_dhcp6_option_iana *iana;
struct grub_net_dhcp6_option_iaaddr *iaaddr;
+ grub_efi_ipv6_address_t *dns;
+ grub_efi_uintn_t num_dns;
d6p = (struct grub_net_dhcp6_packet *)nb->tail;
err = grub_netbuff_put (nb, sizeof(*d6p));
@@ -533,6 +688,25 @@ grub_efinet_create_dhcp_ack_from_device_
opt->len = grub_cpu_to_be16 (uri_len);
grub_memcpy (opt->data, uri_dp->uri, uri_len);
+ dns = grub_dns_server_ip6_address (dp, &num_dns);
+ if (dns)
+ {
+ grub_efi_uintn_t size_dns = sizeof (*dns) * num_dns;
+
+ opt = (struct grub_net_dhcp6_option *)nb->tail;
+ err = grub_netbuff_put (nb, sizeof(*opt) + size_dns);
+ if (err)
+ {
+ grub_free (ddp);
+ grub_netbuff_free (nb);
+ return NULL;
+ }
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_DNS_SERVERS);
+ opt->len = grub_cpu_to_be16 (size_dns);
+ grub_memcpy (opt->data, dns, size_dns);
+ grub_free (dns);
+ }
+
*use_ipv6 = 1;
}
@@ -581,6 +755,7 @@ grub_efi_net_config_real (grub_efi_handl
if (GRUB_EFI_DEVICE_PATH_TYPE (ldp) != GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE
|| (GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) != GRUB_EFI_IPV4_DEVICE_PATH_SUBTYPE
&& GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) != GRUB_EFI_IPV6_DEVICE_PATH_SUBTYPE
+ && GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) != GRUB_EFI_DNS_DEVICE_PATH_SUBTYPE
&& GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp) != GRUB_EFI_URI_DEVICE_PATH_SUBTYPE))
continue;
dup_dp = grub_efi_duplicate_device_path (dp);
@@ -591,6 +766,15 @@ grub_efi_net_config_real (grub_efi_handl
{
dup_ldp = grub_efi_find_last_device_path (dup_dp);
dup_ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
+ dup_ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
+ dup_ldp->length = sizeof (*dup_ldp);
+ }
+
+ dup_ldp = grub_efi_find_last_device_path (dup_dp);
+ if (GRUB_EFI_DEVICE_PATH_SUBTYPE (dup_ldp) == GRUB_EFI_DNS_DEVICE_PATH_SUBTYPE)
+ {
+ dup_ldp = grub_efi_find_last_device_path (dup_dp);
+ dup_ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
dup_ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
dup_ldp->length = sizeof (*dup_ldp);
}
Index: grub-2.02/include/grub/efi/api.h
===================================================================
--- grub-2.02.orig/include/grub/efi/api.h
+++ grub-2.02/include/grub/efi/api.h
@@ -334,6 +334,16 @@
{ 0x8B, 0x8C, 0xE2, 0x1B, 0x01, 0xAE, 0xF2, 0xB7 } \
}
+#define GRUB_EFI_IP4_CONFIG2_PROTOCOL_GUID \
+ { 0x5b446ed1, 0xe30b, 0x4faa, \
+ { 0x87, 0x1a, 0x36, 0x54, 0xec, 0xa3, 0x60, 0x80 } \
+ }
+
+#define GRUB_EFI_IP6_CONFIG_PROTOCOL_GUID \
+ { 0x937fe521, 0x95ae, 0x4d1a, \
+ { 0x89, 0x29, 0x48, 0xbc, 0xd9, 0x0a, 0xd3, 0x1a } \
+ }
+
struct grub_efi_sal_system_table
{
grub_uint32_t signature;
@@ -578,6 +588,23 @@ typedef grub_uint16_t grub_efi_ipv6_addr
typedef grub_uint8_t grub_efi_ip_address_t[8] __attribute__ ((aligned(4)));
typedef grub_efi_uint64_t grub_efi_physical_address_t;
typedef grub_efi_uint64_t grub_efi_virtual_address_t;
+typedef struct {
+ grub_uint8_t addr[4];
+} grub_efi_pxe_ipv4_address_t;
+
+typedef struct {
+ grub_uint8_t addr[16];
+} grub_efi_pxe_ipv6_address_t;
+
+typedef struct {
+ grub_uint8_t addr[32];
+} grub_efi_pxe_mac_address_t;
+
+typedef union {
+ grub_uint32_t addr[4];
+ grub_efi_pxe_ipv4_address_t v4;
+ grub_efi_pxe_ipv6_address_t v6;
+} grub_efi_pxe_ip_address_t;
struct grub_efi_guid
{
@@ -890,6 +917,15 @@ struct grub_efi_uri_device_path
} GRUB_PACKED;
typedef struct grub_efi_uri_device_path grub_efi_uri_device_path_t;
+#define GRUB_EFI_DNS_DEVICE_PATH_SUBTYPE 31
+struct grub_efi_dns_device_path
+{
+ grub_efi_device_path_t header;
+ grub_efi_uint8_t is_ipv6;
+ grub_efi_pxe_ip_address_t dns_server_ip[0];
+} GRUB_PACKED;
+typedef struct grub_efi_dns_device_path grub_efi_dns_device_path_t;
+
#define GRUB_EFI_VENDOR_MESSAGING_DEVICE_PATH_SUBTYPE 10
/* Media Device Path. */
@@ -1463,24 +1499,6 @@ typedef struct grub_efi_simple_text_outp
typedef grub_uint8_t grub_efi_pxe_packet_t[1472];
-typedef struct {
- grub_uint8_t addr[4];
-} grub_efi_pxe_ipv4_address_t;
-
-typedef struct {
- grub_uint8_t addr[16];
-} grub_efi_pxe_ipv6_address_t;
-
-typedef struct {
- grub_uint8_t addr[32];
-} grub_efi_pxe_mac_address_t;
-
-typedef union {
- grub_uint32_t addr[4];
- grub_efi_pxe_ipv4_address_t v4;
- grub_efi_pxe_ipv6_address_t v6;
-} grub_efi_pxe_ip_address_t;
-
#define GRUB_EFI_PXE_BASE_CODE_MAX_IPCNT 8
typedef struct {
grub_uint8_t filters;
@@ -1749,6 +1767,72 @@ struct grub_efi_block_io
};
typedef struct grub_efi_block_io grub_efi_block_io_t;
+enum grub_efi_ip4_config2_data_type {
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_INTERFACEINFO,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_POLICY,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_MANUAL_ADDRESS,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_GATEWAY,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_DNSSERVER,
+ GRUB_EFI_IP4_CONFIG2_DATA_TYPE_MAXIMUM
+};
+typedef enum grub_efi_ip4_config2_data_type grub_efi_ip4_config2_data_type_t;
+
+struct grub_efi_ip4_config2_protocol
+{
+ grub_efi_status_t (*set_data) (struct grub_efi_ip4_config2_protocol *this,
+ grub_efi_ip4_config2_data_type_t data_type,
+ grub_efi_uintn_t data_size,
+ void *data);
+
+ grub_efi_status_t (*get_data) (struct grub_efi_ip4_config2_protocol *this,
+ grub_efi_ip4_config2_data_type_t data_type,
+ grub_efi_uintn_t *data_size,
+ void *data);
+
+ grub_efi_status_t (*register_data_notify) (struct grub_efi_ip4_config2_protocol *this,
+ grub_efi_ip4_config2_data_type_t data_type,
+ grub_efi_event_t event);
+
+ grub_efi_status_t (*unregister_datanotify) (struct grub_efi_ip4_config2_protocol *this,
+ grub_efi_ip4_config2_data_type_t data_type,
+ grub_efi_event_t event);
+};
+typedef struct grub_efi_ip4_config2_protocol grub_efi_ip4_config2_protocol_t;
+
+enum grub_efi_ip6_config_data_type {
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_INTERFACEINFO,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_ALT_INTERFACEID,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_POLICY,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_DUP_ADDR_DETECT_TRANSMITS,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_MANUAL_ADDRESS,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_GATEWAY,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_DNSSERVER,
+ GRUB_EFI_IP6_CONFIG_DATA_TYPE_MAXIMUM
+};
+typedef enum grub_efi_ip6_config_data_type grub_efi_ip6_config_data_type_t;
+
+struct grub_efi_ip6_config_protocol
+{
+ grub_efi_status_t (*set_data) (struct grub_efi_ip6_config_protocol *this,
+ grub_efi_ip6_config_data_type_t data_type,
+ grub_efi_uintn_t data_size,
+ void *data);
+
+ grub_efi_status_t (*get_data) (struct grub_efi_ip6_config_protocol *this,
+ grub_efi_ip6_config_data_type_t data_type,
+ grub_efi_uintn_t *data_size,
+ void *data);
+
+ grub_efi_status_t (*register_data_notify) (struct grub_efi_ip6_config_protocol *this,
+ grub_efi_ip6_config_data_type_t data_type,
+ grub_efi_event_t event);
+
+ grub_efi_status_t (*unregister_datanotify) (struct grub_efi_ip6_config_protocol *this,
+ grub_efi_ip6_config_data_type_t data_type,
+ grub_efi_event_t event);
+};
+typedef struct grub_efi_ip6_config_protocol grub_efi_ip6_config_protocol_t;
+
#if (GRUB_TARGET_SIZEOF_VOID_P == 4) || defined (__ia64__) \
|| defined (__aarch64__) || defined (__MINGW64__) || defined (__CYGWIN__)
