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grub2.20932
0002-Add-Virtual-LAN-support.patch
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File 0002-Add-Virtual-LAN-support.patch of Package grub2.20932
From d17c80ca8de35f8cb06175965d428bdabbda3c19 Mon Sep 17 00:00:00 2001 From: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com> Date: Mon, 30 Jun 2014 10:37:08 -0300 Subject: [PATCH 2/2] 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 --- ChangeLog | 17 ++++++++++++ grub-core/net/arp.c | 10 +++++-- grub-core/net/drivers/ieee1275/ofnet.c | 20 +++++++++++++- grub-core/net/ethernet.c | 49 ++++++++++++++++++++++++++++++---- grub-core/net/ip.c | 31 ++++++++++++++------- include/grub/net.h | 9 +++++++ include/grub/net/arp.h | 5 ++-- include/grub/net/ip.h | 3 ++- 8 files changed, 124 insertions(+), 20 deletions(-) Index: grub-2.02~beta3/grub-core/net/arp.c =================================================================== --- grub-2.02~beta3.orig/grub-core/net/arp.c 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/grub-core/net/arp.c 2016-02-28 19:23:27.056877621 +0300 @@ -111,8 +111,8 @@ } 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_vid) { struct arppkt *arp_packet = (struct arppkt *) nb->data; grub_net_network_level_address_t sender_addr, target_addr; @@ -138,6 +138,12 @@ FOR_NET_NETWORK_LEVEL_INTERFACES (inf) { + /* Check vlantag id */ + if (inf->card == card && + ((inf->vlantag.set && vlantag_vid != inf->vlantag.vid) || + (!inf->vlantag.set && vlantag_vid != 0))) + continue; + /* 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)) Index: grub-2.02~beta3/grub-core/net/drivers/ieee1275/ofnet.c =================================================================== --- grub-2.02~beta3.orig/grub-core/net/drivers/ieee1275/ofnet.c 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/grub-core/net/drivers/ieee1275/ofnet.c 2016-02-28 19:24:47.004878566 +0300 @@ -147,11 +147,11 @@ 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_uint32_t vlantag = 0; hw_addr.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET; @@ -169,6 +169,18 @@ *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) > 4)) + { + vlantag = grub_strtoul (equal_char + 1, 0, 16) & 0xffff; + if (grub_errno == GRUB_ERR_BAD_NUMBER) + { + vlantag = 0; + grub_errno = GRUB_ERR_NONE; + } + } + *equal_char = '='; } else @@ -207,6 +219,12 @@ hw_addr.mac, sizeof(hw_addr.mac), 0); inter = grub_net_add_addr ((*card)->name, *card, &client_addr, &hw_addr, flags); + if (vlantag > 0) + { + inter->vlantag.set = 1; + inter->vlantag.vid = vlantag & 0xfff; + } + grub_net_add_ipv4_local (inter, __builtin_ctz (~grub_le_to_cpu32 (subnet_mask.ipv4))); } Index: grub-2.02~beta3/grub-core/net/ethernet.c =================================================================== --- grub-2.02~beta3.orig/grub-core/net/ethernet.c 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/grub-core/net/ethernet.c 2016-02-28 19:23:27.056877621 +0300 @@ -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 +57,16 @@ { struct etherhdr *eth; grub_err_t err; + grub_uint8_t etherhdr_size; - 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.set) + etherhdr_size += 4; + + err = grub_netbuff_push (nb, etherhdr_size); if (err) return err; eth = (struct etherhdr *) nb->data; @@ -76,6 +83,21 @@ return err; inf->card->opened = 1; } + + /* Check and add a vlan-tag if needed. */ + if (inf->vlantag.set) + { + grub_uint32_t vlantag; + vlantag = grub_cpu_to_be32 ((VLANTAG_IDENTIFIER << 16) | inf->vlantag.vid); + + /* 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, 4); + } + return inf->card->driver->send (inf->card, nb); } @@ -90,10 +112,26 @@ 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_vid = 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) == + grub_cpu_to_be16_compile_time (VLANTAG_IDENTIFIER)) + { + vlantag_vid = grub_be_to_cpu16 (grub_get_unaligned16 (nb->data + + etherhdr_size)) & 0x1fff; + 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 +159,14 @@ { /* ARP packet. */ case GRUB_NET_ETHERTYPE_ARP: - grub_net_arp_receive (nb, card); + grub_net_arp_receive (nb, card, vlantag_vid); 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_vid); } grub_netbuff_free (nb); return GRUB_ERR_NONE; Index: grub-2.02~beta3/grub-core/net/ip.c =================================================================== --- grub-2.02~beta3.orig/grub-core/net/ip.c 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/grub-core/net/ip.c 2016-02-28 19:23:27.056877621 +0300 @@ -228,12 +228,13 @@ 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_vid, 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 +294,13 @@ && grub_net_addr_cmp (&inf->address, dest) == 0 && grub_net_hwaddr_cmp (&inf->hwaddress, hwaddress) == 0) break; + + /* Check vlantag id */ + if (inf->card == card && + ((inf->vlantag.set && vlantag_vid != inf->vlantag.vid) || + (!inf->vlantag.set && vlantag_vid != 0))) + continue; + /* Solicited node multicast. */ if (inf->card == card && inf->address.type == GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6 @@ -381,7 +389,8 @@ 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_vid) { struct iphdr *iph = (struct iphdr *) nb->data; grub_err_t err; @@ -456,7 +465,7 @@ dest.ipv4 = iph->dest; return handle_dgram (nb, card, src_hwaddress, hwaddress, iph->protocol, - &source, &dest, iph->ttl); + &source, &dest, vlantag_vid, iph->ttl); } for (prev = &reassembles, rsm = *prev; rsm; prev = &rsm->next, rsm = *prev) @@ -592,7 +601,7 @@ dest.ipv4 = dst; return handle_dgram (ret, card, src_hwaddress, - hwaddress, proto, &source, &dest, + hwaddress, proto, &source, &dest, vlantag_vid, ttl); } } @@ -650,7 +659,8 @@ 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_vid) { struct ip6hdr *iph = (struct ip6hdr *) nb->data; grub_err_t err; @@ -701,21 +711,24 @@ 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_vid, 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_vid) { 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_vid); 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_vid); grub_dprintf ("net", "Bad IP version: %d\n", (iph->verhdrlen >> 4)); grub_netbuff_free (nb); return GRUB_ERR_NONE; Index: grub-2.02~beta3/include/grub/net.h =================================================================== --- grub-2.02~beta3.orig/include/grub/net.h 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/include/grub/net.h 2016-02-28 19:23:27.056877621 +0300 @@ -280,6 +280,12 @@ extern grub_net_t (*EXPORT_VAR (grub_net_open)) (const char *name); +struct grub_net_vlantag +{ + grub_uint8_t set; + grub_uint16_t vid; +}; + struct grub_net_network_level_interface { struct grub_net_network_level_interface *next; @@ -291,6 +297,7 @@ grub_net_interface_flags_t flags; struct grub_net_bootp_packet *dhcp_ack; grub_size_t dhcp_acklen; + struct grub_net_vlantag vlantag; void *data; }; @@ -561,4 +568,6 @@ #define GRUB_NET_INTERVAL 400 #define GRUB_NET_INTERVAL_ADDITION 20 +#define VLANTAG_IDENTIFIER 0x8100 + #endif /* ! GRUB_NET_HEADER */ Index: grub-2.02~beta3/include/grub/net/arp.h =================================================================== --- grub-2.02~beta3.orig/include/grub/net/arp.h 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/include/grub/net/arp.h 2016-02-28 19:23:27.056877621 +0300 @@ -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_vid); 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 Index: grub-2.02~beta3/include/grub/net/ip.h =================================================================== --- grub-2.02~beta3.orig/include/grub/net/ip.h 2016-02-28 19:23:27.060877621 +0300 +++ grub-2.02~beta3/include/grub/net/ip.h 2016-02-28 19:23:27.056877621 +0300 @@ -48,7 +48,8 @@ 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_vid); grub_err_t grub_net_send_ip_packet (struct grub_net_network_level_interface *inf,
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