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grub2/0013-Add-Virtual-LAN-support.patch
Javier Martinez Canillas afb0baacd6
Use BLS fragment filename as menu entry id and for sort criterion 
The BLS config filenames are guaranteed to be unique, so they can be
used as GRUB2 entry id and can also be used to sort the menu entries.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2018-07-02 17:33:09 +02:00

350 lines
13 KiB
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Raw Blame History

From d9f7de0ae3c0c09cff7257c55418450261f3e082 Mon Sep 17 00:00:00 2001
From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
Date: Mon, 23 Dec 2013 12:32:02 -0200
Subject: [PATCH 013/250] Add Virtual LAN support.
This patch adds support for virtual LAN (VLAN) tagging. VLAN tagging allows
multiple VLANs in a bridged network to share the same physical network link
but maintain isolation:
http://en.wikipedia.org/wiki/IEEE_802.1Q
* grub-core/net/ethernet.c: Add check, get, and set vlan tag id.
* grub-core/net/drivers/ieee1275/ofnet.c: Get vlan tag id from bootargs.
* grub-core/net/arp.c: Add check.
* grub-core/net/ip.c: Likewise.
* include/grub/net/arp.h: Add vlantag attribute.
* include/grub/net/ip.h: Likewise.
---
grub-core/net/arp.c | 12 +++++++--
grub-core/net/drivers/ieee1275/ofnet.c | 9 ++++++-
grub-core/net/ethernet.c | 47 ++++++++++++++++++++++++++++++----
grub-core/net/ip.c | 33 +++++++++++++++++-------
include/grub/net.h | 3 +++
include/grub/net/arp.h | 5 ++--
include/grub/net/ip.h | 3 ++-
7 files changed, 92 insertions(+), 20 deletions(-)
diff --git a/grub-core/net/arp.c b/grub-core/net/arp.c
index 4b68c4151a1..54306e3b16d 100644
--- a/grub-core/net/arp.c
+++ b/grub-core/net/arp.c
@@ -111,8 +111,8 @@ grub_net_arp_send_request (struct grub_net_network_level_interface *inf,
}
grub_err_t
-grub_net_arp_receive (struct grub_net_buff *nb,
- struct grub_net_card *card)
+grub_net_arp_receive (struct grub_net_buff *nb, struct grub_net_card *card,
+ grub_uint16_t *vlantag)
{
struct arppkt *arp_packet = (struct arppkt *) nb->data;
grub_net_network_level_address_t sender_addr, target_addr;
@@ -138,6 +138,14 @@ grub_net_arp_receive (struct grub_net_buff *nb,
FOR_NET_NETWORK_LEVEL_INTERFACES (inf)
{
+ /* Verify vlantag id */
+ if (inf->card == card && inf->vlantag != *vlantag)
+ {
+ grub_dprintf ("net", "invalid vlantag! %x != %x\n",
+ inf->vlantag, *vlantag);
+ break;
+ }
+
/* Am I the protocol address target? */
if (grub_net_addr_cmp (&inf->address, &target_addr) == 0
&& arp_packet->op == grub_cpu_to_be16_compile_time (ARP_REQUEST))
diff --git a/grub-core/net/drivers/ieee1275/ofnet.c b/grub-core/net/drivers/ieee1275/ofnet.c
index a78d164db1a..002446be1c3 100644
--- a/grub-core/net/drivers/ieee1275/ofnet.c
+++ b/grub-core/net/drivers/ieee1275/ofnet.c
@@ -153,11 +153,11 @@ grub_ieee1275_parse_bootpath (const char *devpath, char *bootpath,
char *comma_char = 0;
char *equal_char = 0;
grub_size_t field_counter = 0;
-
grub_net_network_level_address_t client_addr, gateway_addr, subnet_mask;
grub_net_link_level_address_t hw_addr;
grub_net_interface_flags_t flags = 0;
struct grub_net_network_level_interface *inter = NULL;
+ grub_uint16_t vlantag = 0;
hw_addr.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
@@ -175,6 +175,11 @@ grub_ieee1275_parse_bootpath (const char *devpath, char *bootpath,
*equal_char = 0;
grub_env_set_net_property ((*card)->name, args, equal_char + 1,
grub_strlen(equal_char + 1));
+
+ if ((grub_strcmp (args, "vtag") == 0) &&
+ (grub_strlen (equal_char + 1) == 8))
+ vlantag = grub_strtoul (equal_char + 1 + 4, 0, 16);
+
*equal_char = '=';
}
else
@@ -213,8 +218,10 @@ grub_ieee1275_parse_bootpath (const char *devpath, char *bootpath,
hw_addr.mac, sizeof(hw_addr.mac), 0);
inter = grub_net_add_addr ((*card)->name, *card, &client_addr, &hw_addr,
flags);
+ inter->vlantag = vlantag;
grub_net_add_ipv4_local (inter,
__builtin_ctz (~grub_le_to_cpu32 (subnet_mask.ipv4)));
+
}
if (gateway_addr.ipv4 != 0)
diff --git a/grub-core/net/ethernet.c b/grub-core/net/ethernet.c
index c397b1b348c..4d7ceed6f93 100644
--- a/grub-core/net/ethernet.c
+++ b/grub-core/net/ethernet.c
@@ -18,6 +18,7 @@
#include <grub/misc.h>
#include <grub/mm.h>
+#include <grub/env.h>
#include <grub/net/ethernet.h>
#include <grub/net/ip.h>
#include <grub/net/arp.h>
@@ -56,10 +57,17 @@ send_ethernet_packet (struct grub_net_network_level_interface *inf,
{
struct etherhdr *eth;
grub_err_t err;
+ grub_uint8_t etherhdr_size;
+ grub_uint16_t vlantag_id = VLANTAG_IDENTIFIER;
- COMPILE_TIME_ASSERT (sizeof (*eth) < GRUB_NET_MAX_LINK_HEADER_SIZE);
+ etherhdr_size = sizeof (*eth);
+ COMPILE_TIME_ASSERT (sizeof (*eth) + 4 < GRUB_NET_MAX_LINK_HEADER_SIZE);
- err = grub_netbuff_push (nb, sizeof (*eth));
+ /* Increase ethernet header in case of vlantag */
+ if (inf->vlantag != 0)
+ etherhdr_size += 4;
+
+ err = grub_netbuff_push (nb, etherhdr_size);
if (err)
return err;
eth = (struct etherhdr *) nb->data;
@@ -76,6 +84,19 @@ send_ethernet_packet (struct grub_net_network_level_interface *inf,
return err;
inf->card->opened = 1;
}
+
+ /* Check and add a vlan-tag if needed. */
+ if (inf->vlantag != 0)
+ {
+ /* Move eth type to the right */
+ grub_memcpy ((char *) nb->data + etherhdr_size - 2,
+ (char *) nb->data + etherhdr_size - 6, 2);
+
+ /* Add the tag in the middle */
+ grub_memcpy ((char *) nb->data + etherhdr_size - 6, &vlantag_id, 2);
+ grub_memcpy ((char *) nb->data + etherhdr_size - 4, (char *) &(inf->vlantag), 2);
+ }
+
return inf->card->driver->send (inf->card, nb);
}
@@ -90,10 +111,25 @@ grub_net_recv_ethernet_packet (struct grub_net_buff *nb,
grub_net_link_level_address_t hwaddress;
grub_net_link_level_address_t src_hwaddress;
grub_err_t err;
+ grub_uint8_t etherhdr_size = sizeof (*eth);
+ grub_uint16_t vlantag = 0;
+
+
+ /* Check if a vlan-tag is present. If so, the ethernet header is 4 bytes */
+ /* longer than the original one. The vlantag id is extracted and the header */
+ /* is reseted to the original size. */
+ if (grub_get_unaligned16 (nb->data + etherhdr_size - 2) == VLANTAG_IDENTIFIER)
+ {
+ vlantag = grub_get_unaligned16 (nb->data + etherhdr_size);
+ etherhdr_size += 4;
+ /* Move eth type to the original position */
+ grub_memcpy((char *) nb->data + etherhdr_size - 6,
+ (char *) nb->data + etherhdr_size - 2, 2);
+ }
eth = (struct etherhdr *) nb->data;
type = grub_be_to_cpu16 (eth->type);
- err = grub_netbuff_pull (nb, sizeof (*eth));
+ err = grub_netbuff_pull (nb, etherhdr_size);
if (err)
return err;
@@ -121,13 +157,14 @@ grub_net_recv_ethernet_packet (struct grub_net_buff *nb,
{
/* ARP packet. */
case GRUB_NET_ETHERTYPE_ARP:
- grub_net_arp_receive (nb, card);
+ grub_net_arp_receive (nb, card, &vlantag);
grub_netbuff_free (nb);
return GRUB_ERR_NONE;
/* IP packet. */
case GRUB_NET_ETHERTYPE_IP:
case GRUB_NET_ETHERTYPE_IP6:
- return grub_net_recv_ip_packets (nb, card, &hwaddress, &src_hwaddress);
+ return grub_net_recv_ip_packets (nb, card, &hwaddress, &src_hwaddress,
+ &vlantag);
}
grub_netbuff_free (nb);
return GRUB_ERR_NONE;
diff --git a/grub-core/net/ip.c b/grub-core/net/ip.c
index aba4f89087b..7c95cc7464a 100644
--- a/grub-core/net/ip.c
+++ b/grub-core/net/ip.c
@@ -228,12 +228,13 @@ handle_dgram (struct grub_net_buff *nb,
grub_net_ip_protocol_t proto,
const grub_net_network_level_address_t *source,
const grub_net_network_level_address_t *dest,
+ grub_uint16_t *vlantag,
grub_uint8_t ttl)
{
struct grub_net_network_level_interface *inf = NULL;
grub_err_t err;
int multicast = 0;
-
+
/* DHCP needs special treatment since we don't know IP yet. */
{
struct udphdr *udph;
@@ -293,6 +294,15 @@ handle_dgram (struct grub_net_buff *nb,
&& grub_net_addr_cmp (&inf->address, dest) == 0
&& grub_net_hwaddr_cmp (&inf->hwaddress, hwaddress) == 0)
break;
+
+ /* Verify vlantag id */
+ if (inf->card == card && inf->vlantag != *vlantag)
+ {
+ grub_dprintf ("net", "invalid vlantag! %x != %x\n",
+ inf->vlantag, *vlantag);
+ break;
+ }
+
/* Solicited node multicast. */
if (inf->card == card
&& inf->address.type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6
@@ -383,7 +393,8 @@ static grub_err_t
grub_net_recv_ip4_packets (struct grub_net_buff *nb,
struct grub_net_card *card,
const grub_net_link_level_address_t *hwaddress,
- const grub_net_link_level_address_t *src_hwaddress)
+ const grub_net_link_level_address_t *src_hwaddress,
+ grub_uint16_t *vlantag)
{
struct iphdr *iph = (struct iphdr *) nb->data;
grub_err_t err;
@@ -458,7 +469,7 @@ grub_net_recv_ip4_packets (struct grub_net_buff *nb,
dest.ipv4 = iph->dest;
return handle_dgram (nb, card, src_hwaddress, hwaddress, iph->protocol,
- &source, &dest, iph->ttl);
+ &source, &dest, vlantag, iph->ttl);
}
for (prev = &reassembles, rsm = *prev; rsm; prev = &rsm->next, rsm = *prev)
@@ -594,7 +605,7 @@ grub_net_recv_ip4_packets (struct grub_net_buff *nb,
dest.ipv4 = dst;
return handle_dgram (ret, card, src_hwaddress,
- hwaddress, proto, &source, &dest,
+ hwaddress, proto, &source, &dest, vlantag,
ttl);
}
}
@@ -652,7 +663,8 @@ static grub_err_t
grub_net_recv_ip6_packets (struct grub_net_buff *nb,
struct grub_net_card *card,
const grub_net_link_level_address_t *hwaddress,
- const grub_net_link_level_address_t *src_hwaddress)
+ const grub_net_link_level_address_t *src_hwaddress,
+ grub_uint16_t *vlantag)
{
struct ip6hdr *iph = (struct ip6hdr *) nb->data;
grub_err_t err;
@@ -703,21 +715,24 @@ grub_net_recv_ip6_packets (struct grub_net_buff *nb,
grub_memcpy (dest.ipv6, &iph->dest, sizeof (dest.ipv6));
return handle_dgram (nb, card, src_hwaddress, hwaddress, iph->protocol,
- &source, &dest, iph->ttl);
+ &source, &dest, vlantag, iph->ttl);
}
grub_err_t
grub_net_recv_ip_packets (struct grub_net_buff *nb,
struct grub_net_card *card,
const grub_net_link_level_address_t *hwaddress,
- const grub_net_link_level_address_t *src_hwaddress)
+ const grub_net_link_level_address_t *src_hwaddress,
+ grub_uint16_t *vlantag)
{
struct iphdr *iph = (struct iphdr *) nb->data;
if ((iph->verhdrlen >> 4) == 4)
- return grub_net_recv_ip4_packets (nb, card, hwaddress, src_hwaddress);
+ return grub_net_recv_ip4_packets (nb, card, hwaddress, src_hwaddress,
+ vlantag);
if ((iph->verhdrlen >> 4) == 6)
- return grub_net_recv_ip6_packets (nb, card, hwaddress, src_hwaddress);
+ return grub_net_recv_ip6_packets (nb, card, hwaddress, src_hwaddress,
+ vlantag);
grub_dprintf ("net", "Bad IP version: %d\n", (iph->verhdrlen >> 4));
grub_netbuff_free (nb);
return GRUB_ERR_NONE;
diff --git a/include/grub/net.h b/include/grub/net.h
index 2192fa18628..1096b24322e 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -291,6 +291,7 @@ struct grub_net_network_level_interface
grub_net_interface_flags_t flags;
struct grub_net_bootp_packet *dhcp_ack;
grub_size_t dhcp_acklen;
+ grub_uint16_t vlantag;
void *data;
};
@@ -561,4 +562,6 @@ extern char *grub_net_default_server;
#define GRUB_NET_INTERVAL 400
#define GRUB_NET_INTERVAL_ADDITION 20
+#define VLANTAG_IDENTIFIER 0x8100
+
#endif /* ! GRUB_NET_HEADER */
diff --git a/include/grub/net/arp.h b/include/grub/net/arp.h
index bb1703622e1..8d9d081134f 100644
--- a/include/grub/net/arp.h
+++ b/include/grub/net/arp.h
@@ -22,10 +22,11 @@
#include <grub/net.h>
extern grub_err_t grub_net_arp_receive (struct grub_net_buff *nb,
- struct grub_net_card *card);
+ struct grub_net_card *card,
+ grub_uint16_t *vlantag);
grub_err_t
grub_net_arp_send_request (struct grub_net_network_level_interface *inf,
- const grub_net_network_level_address_t *proto_addr);
+ const grub_net_network_level_address_t *proto_addr);
#endif
diff --git a/include/grub/net/ip.h b/include/grub/net/ip.h
index dcceaa56894..ab9d68f9825 100644
--- a/include/grub/net/ip.h
+++ b/include/grub/net/ip.h
@@ -48,7 +48,8 @@ grub_err_t
grub_net_recv_ip_packets (struct grub_net_buff *nb,
struct grub_net_card *card,
const grub_net_link_level_address_t *hwaddress,
- const grub_net_link_level_address_t *src_hwaddress);
+ const grub_net_link_level_address_t *src_hwaddress,
+ grub_uint16_t *vlantag);
grub_err_t
grub_net_send_ip_packet (struct grub_net_network_level_interface *inf,
--
2.17.1
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