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From f6c8c7985fd88fc89cd49227c9e74feaf58cfdd6 Mon Sep 17 00:00:00 2001
From: Michael Chang <[email protected]>
Date: Sun, 10 Jul 2016 23:46:06 +0800
Subject: [PATCH 3/8] bootp: New net_bootp6 command
Implement new net_bootp6 command for IPv6 network auto configuration via the
DHCPv6 protocol (RFC3315).
Signed-off-by: Michael Chang <[email protected]>
Signed-off-by: Ken Lin <[email protected]>
V1:
* Use grub_calloc for overflow check and return NULL when it would
occur.
---
grub-core/net/bootp.c | 908 +++++++++++++++++++++++++++++++++++++++++++++++++-
grub-core/net/ip.c | 39 +++
include/grub/net.h | 72 ++++
3 files changed, 1018 insertions(+), 1 deletion(-)
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -24,6 +24,98 @@
#include <grub/net/netbuff.h>
#include <grub/net/udp.h>
#include <grub/datetime.h>
+#include <grub/time.h>
+#include <grub/list.h>
+
+static int
+dissect_url (const char *url, char **proto, char **host, char **path)
+{
+ const char *p, *ps;
+ grub_size_t l;
+
+ *proto = *host = *path = NULL;
+ ps = p = url;
+
+ while ((p = grub_strchr (p, ':')))
+ {
+ if (grub_strlen (p) < sizeof ("://") - 1)
+ break;
+ if (grub_memcmp (p, "://", sizeof ("://") - 1) == 0)
+ {
+ l = p - ps;
+ *proto = grub_malloc (l + 1);
+ if (!*proto)
+ {
+ grub_print_error ();
+ return 0;
+ }
+
+ grub_memcpy (*proto, ps, l);
+ (*proto)[l] = '\0';
+ p += sizeof ("://") - 1;
+ break;
+ }
+ ++p;
+ }
+
+ if (!*proto)
+ {
+ grub_dprintf ("bootp", "url: %s is not valid, protocol not found\n", url);
+ return 0;
+ }
+
+ ps = p;
+ p = grub_strchr (p, '/');
+
+ if (!p)
+ {
+ grub_dprintf ("bootp", "url: %s is not valid, host/path not found\n", url);
+ grub_free (*proto);
+ *proto = NULL;
+ return 0;
+ }
+
+ l = p - ps;
+
+ if (l > 2 && ps[0] == '[' && ps[l - 1] == ']')
+ {
+ *host = grub_malloc (l - 1);
+ if (!*host)
+ {
+ grub_print_error ();
+ grub_free (*proto);
+ *proto = NULL;
+ return 0;
+ }
+ grub_memcpy (*host, ps + 1, l - 2);
+ (*host)[l - 2] = 0;
+ }
+ else
+ {
+ *host = grub_malloc (l + 1);
+ if (!*host)
+ {
+ grub_print_error ();
+ grub_free (*proto);
+ *proto = NULL;
+ return 0;
+ }
+ grub_memcpy (*host, ps, l);
+ (*host)[l] = 0;
+ }
+
+ *path = grub_strdup (p);
+ if (!*path)
+ {
+ grub_print_error ();
+ grub_free (*host);
+ grub_free (*proto);
+ *host = NULL;
+ *proto = NULL;
+ return 0;
+ }
+ return 1;
+}
struct grub_dhcp_discover_options
{
@@ -610,6 +702,578 @@
return err;
}
+/* The default netbuff size for sending DHCPv6 packets which should be
+ large enough to hold the information */
+#define GRUB_DHCP6_DEFAULT_NETBUFF_ALLOC_SIZE 512
+
+struct grub_dhcp6_options
+{
+ grub_uint8_t *client_duid;
+ grub_uint16_t client_duid_len;
+ grub_uint8_t *server_duid;
+ grub_uint16_t server_duid_len;
+ grub_uint32_t iaid;
+ grub_uint32_t t1;
+ grub_uint32_t t2;
+ grub_net_network_level_address_t *ia_addr;
+ grub_uint32_t preferred_lifetime;
+ grub_uint32_t valid_lifetime;
+ grub_net_network_level_address_t *dns_server_addrs;
+ grub_uint16_t num_dns_server;
+ char *boot_file_proto;
+ char *boot_file_server_ip;
+ char *boot_file_path;
+};
+
+typedef struct grub_dhcp6_options *grub_dhcp6_options_t;
+
+struct grub_dhcp6_session
+{
+ struct grub_dhcp6_session *next;
+ struct grub_dhcp6_session **prev;
+ grub_uint32_t iaid;
+ grub_uint32_t transaction_id:24;
+ grub_uint64_t start_time;
+ struct grub_net_dhcp6_option_duid_ll duid;
+ struct grub_net_network_level_interface *iface;
+
+ /* The associated dhcpv6 options */
+ grub_dhcp6_options_t adv;
+ grub_dhcp6_options_t reply;
+};
+
+typedef struct grub_dhcp6_session *grub_dhcp6_session_t;
+
+typedef void (*dhcp6_option_hook_fn) (const struct grub_net_dhcp6_option *opt, void *data);
+
+static void
+foreach_dhcp6_option (const struct grub_net_dhcp6_option *opt, grub_size_t size,
+ dhcp6_option_hook_fn hook, void *hook_data);
+
+static void
+parse_dhcp6_iaaddr (const struct grub_net_dhcp6_option *opt, void *data)
+{
+ grub_dhcp6_options_t dhcp6 = (grub_dhcp6_options_t )data;
+
+ grub_uint16_t code = grub_be_to_cpu16 (opt->code);
+ grub_uint16_t len = grub_be_to_cpu16 (opt->len);
+
+ if (code == GRUB_NET_DHCP6_OPTION_IAADDR)
+ {
+ const struct grub_net_dhcp6_option_iaaddr *iaaddr;
+ iaaddr = (const struct grub_net_dhcp6_option_iaaddr *)opt->data;
+
+ if (len < sizeof (*iaaddr))
+ {
+ grub_dprintf ("bootp", "DHCPv6: code %u with insufficient length %u\n", code, len);
+ return;
+ }
+ if (!dhcp6->ia_addr)
+ {
+ dhcp6->ia_addr = grub_malloc (sizeof(*dhcp6->ia_addr));
+ dhcp6->ia_addr->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
+ dhcp6->ia_addr->ipv6[0] = grub_get_unaligned64 (iaaddr->addr);
+ dhcp6->ia_addr->ipv6[1] = grub_get_unaligned64 (iaaddr->addr + 8);
+ dhcp6->preferred_lifetime = grub_be_to_cpu32 (iaaddr->preferred_lifetime);
+ dhcp6->valid_lifetime = grub_be_to_cpu32 (iaaddr->valid_lifetime);
+ }
+ }
+}
+
+static void
+parse_dhcp6_option (const struct grub_net_dhcp6_option *opt, void *data)
+{
+ grub_dhcp6_options_t dhcp6 = (grub_dhcp6_options_t)data;
+ grub_uint16_t code = grub_be_to_cpu16 (opt->code);
+ grub_uint16_t len = grub_be_to_cpu16 (opt->len);
+
+ switch (code)
+ {
+ case GRUB_NET_DHCP6_OPTION_CLIENTID:
+
+ if (dhcp6->client_duid || !len)
+ {
+ grub_dprintf ("bootp", "Skipped DHCPv6 CLIENTID with length %u\n", len);
+ break;
+ }
+ dhcp6->client_duid = grub_malloc (len);
+ grub_memcpy (dhcp6->client_duid, opt->data, len);
+ dhcp6->client_duid_len = len;
+ break;
+
+ case GRUB_NET_DHCP6_OPTION_SERVERID:
+
+ if (dhcp6->server_duid || !len)
+ {
+ grub_dprintf ("bootp", "Skipped DHCPv6 SERVERID with length %u\n", len);
+ break;
+ }
+ dhcp6->server_duid = grub_malloc (len);
+ grub_memcpy (dhcp6->server_duid, opt->data, len);
+ dhcp6->server_duid_len = len;
+ break;
+
+ case GRUB_NET_DHCP6_OPTION_IA_NA:
+ {
+ const struct grub_net_dhcp6_option_iana *ia_na;
+ grub_uint16_t data_len;
+
+ if (dhcp6->iaid || len < sizeof (*ia_na))
+ {
+ grub_dprintf ("bootp", "Skipped DHCPv6 IA_NA with length %u\n", len);
+ break;
+ }
+ ia_na = (const struct grub_net_dhcp6_option_iana *)opt->data;
+ dhcp6->iaid = grub_be_to_cpu32 (ia_na->iaid);
+ dhcp6->t1 = grub_be_to_cpu32 (ia_na->t1);
+ dhcp6->t2 = grub_be_to_cpu32 (ia_na->t2);
+
+ data_len = len - sizeof (*ia_na);
+ if (data_len)
+ foreach_dhcp6_option ((const struct grub_net_dhcp6_option *)ia_na->data, data_len, parse_dhcp6_iaaddr, dhcp6);
+ }
+ break;
+
+ case GRUB_NET_DHCP6_OPTION_DNS_SERVERS:
+ {
+ const grub_uint8_t *po;
+ grub_uint16_t ln;
+ grub_net_network_level_address_t *la;
+
+ if (!len || len & 0xf)
+ {
+ grub_dprintf ("bootp", "Skip invalid length DHCPv6 DNS_SERVERS \n");
+ break;
+ }
+ dhcp6->num_dns_server = ln = len >> 4;
+ dhcp6->dns_server_addrs = la = grub_calloc (ln, sizeof (*la));
+
+ for (po = opt->data; ln > 0; po += 0x10, la++, ln--)
+ {
+ la->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
+ la->ipv6[0] = grub_get_unaligned64 (po);
+ la->ipv6[1] = grub_get_unaligned64 (po + 8);
+ la->option = DNS_OPTION_PREFER_IPV6;
+ }
+ }
+ break;
+
+ case GRUB_NET_DHCP6_OPTION_BOOTFILE_URL:
+ dissect_url ((const char *)opt->data,
+ &dhcp6->boot_file_proto,
+ &dhcp6->boot_file_server_ip,
+ &dhcp6->boot_file_path);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static void
+foreach_dhcp6_option (const struct grub_net_dhcp6_option *opt, grub_size_t size, dhcp6_option_hook_fn hook, void *hook_data)
+{
+ while (size)
+ {
+ grub_uint16_t code, len;
+
+ if (size < sizeof (*opt))
+ {
+ grub_dprintf ("bootp", "DHCPv6: Options stopped with remaining size %" PRIxGRUB_SIZE "\n", size);
+ break;
+ }
+ size -= sizeof (*opt);
+ len = grub_be_to_cpu16 (opt->len);
+ code = grub_be_to_cpu16 (opt->code);
+ if (size < len)
+ {
+ grub_dprintf ("bootp", "DHCPv6: Options stopped at out of bound length %u for option %u\n", len, code);
+ break;
+ }
+ if (!len)
+ {
+ grub_dprintf ("bootp", "DHCPv6: Options stopped at zero length option %u\n", code);
+ break;
+ }
+ else
+ {
+ if (hook)
+ hook (opt, hook_data);
+ size -= len;
+ opt = (const struct grub_net_dhcp6_option *)((grub_uint8_t *)opt + len + sizeof (*opt));
+ }
+ }
+}
+
+static grub_dhcp6_options_t
+grub_dhcp6_options_get (const struct grub_net_dhcp6_packet *v6h,
+ grub_size_t size)
+{
+ grub_dhcp6_options_t options;
+
+ if (size < sizeof (*v6h))
+ {
+ grub_error (GRUB_ERR_OUT_OF_RANGE, N_("DHCPv6 packet size too small"));
+ return NULL;
+ }
+
+ options = grub_zalloc (sizeof(*options));
+ if (!options)
+ return NULL;
+
+ foreach_dhcp6_option ((const struct grub_net_dhcp6_option *)v6h->dhcp_options,
+ size - sizeof (*v6h), parse_dhcp6_option, options);
+
+ return options;
+}
+
+static void
+grub_dhcp6_options_free (grub_dhcp6_options_t options)
+{
+ if (options->client_duid)
+ grub_free (options->client_duid);
+ if (options->server_duid)
+ grub_free (options->server_duid);
+ if (options->ia_addr)
+ grub_free (options->ia_addr);
+ if (options->dns_server_addrs)
+ grub_free (options->dns_server_addrs);
+ if (options->boot_file_proto)
+ grub_free (options->boot_file_proto);
+ if (options->boot_file_server_ip)
+ grub_free (options->boot_file_server_ip);
+ if (options->boot_file_path)
+ grub_free (options->boot_file_path);
+
+ grub_free (options);
+}
+
+static grub_dhcp6_session_t grub_dhcp6_sessions;
+#define FOR_DHCP6_SESSIONS(var) FOR_LIST_ELEMENTS (var, grub_dhcp6_sessions)
+
+static void
+grub_net_configure_by_dhcp6_info (const char *name,
+ struct grub_net_card *card,
+ grub_dhcp6_options_t dhcp6,
+ int is_def,
+ int flags,
+ struct grub_net_network_level_interface **ret_inf)
+{
+ grub_net_network_level_netaddress_t netaddr;
+ struct grub_net_network_level_interface *inf;
+
+ if (dhcp6->ia_addr)
+ {
+ inf = grub_net_add_addr (name, card, dhcp6->ia_addr, &card->default_address, flags);
+
+ netaddr.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
+ netaddr.ipv6.base[0] = dhcp6->ia_addr->ipv6[0];
+ netaddr.ipv6.base[1] = 0;
+ netaddr.ipv6.masksize = 64;
+ grub_net_add_route (name, netaddr, inf);
+
+ if (ret_inf)
+ *ret_inf = inf;
+ }
+
+ if (dhcp6->dns_server_addrs)
+ {
+ grub_uint16_t i;
+
+ for (i = 0; i < dhcp6->num_dns_server; ++i)
+ grub_net_add_dns_server (dhcp6->dns_server_addrs + i);
+ }
+
+ if (dhcp6->boot_file_path)
+ grub_env_set_net_property (name, "boot_file", dhcp6->boot_file_path,
+ grub_strlen (dhcp6->boot_file_path));
+
+ if (is_def && dhcp6->boot_file_server_ip)
+ {
+ grub_net_default_server = grub_strdup (dhcp6->boot_file_server_ip);
+ grub_env_set ("net_default_interface", name);
+ grub_env_export ("net_default_interface");
+ }
+}
+
+static void
+grub_dhcp6_session_add (struct grub_net_network_level_interface *iface,
+ grub_uint32_t iaid)
+{
+ grub_dhcp6_session_t se;
+ struct grub_datetime date;
+ grub_err_t err;
+ grub_int64_t t = 0;
+
+ se = grub_malloc (sizeof (*se));
+
+ err = grub_get_datetime (&date);
+ if (err || !grub_datetime2unixtime (&date, &t))
+ {
+ grub_errno = GRUB_ERR_NONE;
+ t = 0;
+ }
+
+ se->iface = iface;
+ se->iaid = iaid;
+ se->transaction_id = t;
+ se->start_time = grub_get_time_ms ();
+ se->duid.type = grub_cpu_to_be16_compile_time (3) ;
+ se->duid.hw_type = grub_cpu_to_be16_compile_time (1);
+ grub_memcpy (&se->duid.hwaddr, &iface->hwaddress.mac, sizeof (se->duid.hwaddr));
+ se->adv = NULL;
+ se->reply = NULL;
+ grub_list_push (GRUB_AS_LIST_P (&grub_dhcp6_sessions), GRUB_AS_LIST (se));
+}
+
+static void
+grub_dhcp6_session_remove (grub_dhcp6_session_t se)
+{
+ grub_list_remove (GRUB_AS_LIST (se));
+ if (se->adv)
+ grub_dhcp6_options_free (se->adv);
+ if (se->reply)
+ grub_dhcp6_options_free (se->reply);
+ grub_free (se);
+}
+
+static void
+grub_dhcp6_session_remove_all (void)
+{
+ grub_dhcp6_session_t se;
+
+ FOR_DHCP6_SESSIONS (se)
+ {
+ grub_dhcp6_session_remove (se);
+ se = grub_dhcp6_sessions;
+ }
+}
+
+static grub_err_t
+grub_dhcp6_session_configure_network (grub_dhcp6_session_t se)
+{
+ char *name;
+
+ name = grub_xasprintf ("%s:dhcp6", se->iface->card->name);
+ if (!name)
+ return grub_errno;
+
+ grub_net_configure_by_dhcp6_info (name, se->iface->card, se->reply, 1, 0, 0);
+ grub_free (name);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_dhcp6_session_send_request (grub_dhcp6_session_t se)
+{
+ struct grub_net_buff *nb;
+ struct grub_net_dhcp6_option *opt;
+ struct grub_net_dhcp6_packet *v6h;
+ struct grub_net_dhcp6_option_iana *ia_na;
+ struct grub_net_dhcp6_option_iaaddr *iaaddr;
+ struct udphdr *udph;
+ grub_net_network_level_address_t multicast;
+ grub_net_link_level_address_t ll_multicast;
+ grub_uint64_t elapsed;
+ struct grub_net_network_level_interface *inf = se->iface;
+ grub_dhcp6_options_t dhcp6 = se->adv;
+ grub_err_t err = GRUB_ERR_NONE;
+
+ multicast.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
+ multicast.ipv6[0] = grub_cpu_to_be64_compile_time (0xff02ULL << 48);
+ multicast.ipv6[1] = grub_cpu_to_be64_compile_time (0x10002ULL);
+
+ err = grub_net_link_layer_resolve (inf, &multicast, &ll_multicast);
+ if (err)
+ return err;
+
+ nb = grub_netbuff_alloc (GRUB_DHCP6_DEFAULT_NETBUFF_ALLOC_SIZE);
+
+ if (!nb)
+ return grub_errno;
+
+ err = grub_netbuff_reserve (nb, GRUB_DHCP6_DEFAULT_NETBUFF_ALLOC_SIZE);
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ err = grub_netbuff_push (nb, dhcp6->client_duid_len + sizeof (*opt));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+ opt = (struct grub_net_dhcp6_option *)nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_CLIENTID);
+ opt->len = grub_cpu_to_be16 (dhcp6->client_duid_len);
+ grub_memcpy (opt->data, dhcp6->client_duid , dhcp6->client_duid_len);
+
+ err = grub_netbuff_push (nb, dhcp6->server_duid_len + sizeof (*opt));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+ opt = (struct grub_net_dhcp6_option *)nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_SERVERID);
+ opt->len = grub_cpu_to_be16 (dhcp6->server_duid_len);
+ grub_memcpy (opt->data, dhcp6->server_duid , dhcp6->server_duid_len);
+
+ err = grub_netbuff_push (nb, sizeof (*ia_na) + sizeof (*opt));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ if (dhcp6->ia_addr)
+ {
+ err = grub_netbuff_push (nb, sizeof(*iaaddr) + sizeof (*opt));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+ }
+ opt = (struct grub_net_dhcp6_option *)nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_IA_NA);
+ opt->len = grub_cpu_to_be16 (sizeof (*ia_na));
+ if (dhcp6->ia_addr)
+ opt->len += grub_cpu_to_be16 (sizeof(*iaaddr) + sizeof (*opt));
+
+ ia_na = (struct grub_net_dhcp6_option_iana *)opt->data;
+ ia_na->iaid = grub_cpu_to_be32 (dhcp6->iaid);
+
+ ia_na->t1 = grub_cpu_to_be32 (dhcp6->t1);
+ ia_na->t2 = grub_cpu_to_be32 (dhcp6->t2);
+
+ if (dhcp6->ia_addr)
+ {
+ opt = (struct grub_net_dhcp6_option *)ia_na->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_IAADDR);
+ opt->len = grub_cpu_to_be16 (sizeof (*iaaddr));
+ iaaddr = (struct grub_net_dhcp6_option_iaaddr *)opt->data;
+ grub_set_unaligned64 (iaaddr->addr, dhcp6->ia_addr->ipv6[0]);
+ grub_set_unaligned64 (iaaddr->addr + 8, dhcp6->ia_addr->ipv6[1]);
+
+ iaaddr->preferred_lifetime = grub_cpu_to_be32 (dhcp6->preferred_lifetime);
+ iaaddr->valid_lifetime = grub_cpu_to_be32 (dhcp6->valid_lifetime);
+ }
+
+ err = grub_netbuff_push (nb, sizeof (*opt) + 2 * sizeof (grub_uint16_t));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ opt = (struct grub_net_dhcp6_option*) nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_ORO);
+ opt->len = grub_cpu_to_be16_compile_time (2 * sizeof (grub_uint16_t));
+ grub_set_unaligned16 (opt->data, grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_BOOTFILE_URL));
+ grub_set_unaligned16 (opt->data + 2, grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_DNS_SERVERS));
+
+ err = grub_netbuff_push (nb, sizeof (*opt) + sizeof (grub_uint16_t));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+ opt = (struct grub_net_dhcp6_option*) nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_ELAPSED_TIME);
+ opt->len = grub_cpu_to_be16_compile_time (sizeof (grub_uint16_t));
+
+ /* the time is expressed in hundredths of a second */
+ elapsed = grub_divmod64 (grub_get_time_ms () - se->start_time, 10, 0);
+
+ if (elapsed > 0xffff)
+ elapsed = 0xffff;
+
+ grub_set_unaligned16 (opt->data, grub_cpu_to_be16 ((grub_uint16_t)elapsed));
+
+ err = grub_netbuff_push (nb, sizeof (*v6h));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ v6h = (struct grub_net_dhcp6_packet *) nb->data;
+ v6h->message_type = GRUB_NET_DHCP6_REQUEST;
+ v6h->transaction_id = se->transaction_id;
+
+ err = grub_netbuff_push (nb, sizeof (*udph));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ udph = (struct udphdr *) nb->data;
+ udph->src = grub_cpu_to_be16_compile_time (DHCP6_CLIENT_PORT);
+ udph->dst = grub_cpu_to_be16_compile_time (DHCP6_SERVER_PORT);
+ udph->chksum = 0;
+ udph->len = grub_cpu_to_be16 (nb->tail - nb->data);
+
+ udph->chksum = grub_net_ip_transport_checksum (nb, GRUB_NET_IP_UDP,
+ &inf->address,
+ &multicast);
+ err = grub_net_send_ip_packet (inf, &multicast, &ll_multicast, nb,
+ GRUB_NET_IP_UDP);
+
+ grub_netbuff_free (nb);
+
+ return err;
+}
+
+struct grub_net_network_level_interface *
+grub_net_configure_by_dhcpv6_reply (const char *name,
+ struct grub_net_card *card,
+ grub_net_interface_flags_t flags,
+ const struct grub_net_dhcp6_packet *v6h,
+ grub_size_t size,
+ int is_def,
+ char **device, char **path)
+{
+ struct grub_net_network_level_interface *inf;
+ grub_dhcp6_options_t dhcp6;
+
+ dhcp6 = grub_dhcp6_options_get (v6h, size);
+ if (!dhcp6)
+ {
+ grub_print_error ();
+ return NULL;
+ }
+
+ grub_net_configure_by_dhcp6_info (name, card, dhcp6, is_def, flags, &inf);
+
+ if (device && dhcp6->boot_file_proto && dhcp6->boot_file_server_ip)
+ {
+ *device = grub_xasprintf ("%s,%s", dhcp6->boot_file_proto, dhcp6->boot_file_server_ip);
+ grub_print_error ();
+ }
+ if (path && dhcp6->boot_file_path)
+ {
+ *path = grub_strdup (dhcp6->boot_file_path);
+ grub_print_error ();
+ if (*path)
+ {
+ char *slash;
+ slash = grub_strrchr (*path, '/');
+ if (slash)
+ *slash = 0;
+ else
+ **path = 0;
+ }
+ }
+
+ grub_dhcp6_options_free (dhcp6);
+ return inf;
+}
+
/*
* This is called directly from net/ip.c:handle_dgram(), because those
* BOOTP/DHCP packets are a bit special due to their improper
@@ -678,6 +1342,77 @@
}
}
+grub_err_t
+grub_net_process_dhcp6 (struct grub_net_buff *nb,
+ struct grub_net_card *card __attribute__ ((unused)))
+{
+ const struct grub_net_dhcp6_packet *v6h;
+ grub_dhcp6_session_t se;
+ grub_size_t size;
+ grub_dhcp6_options_t options;
+
+ v6h = (const struct grub_net_dhcp6_packet *) nb->data;
+ size = nb->tail - nb->data;
+
+ options = grub_dhcp6_options_get (v6h, size);
+ if (!options)
+ return grub_errno;
+
+ if (!options->client_duid || !options->server_duid || !options->ia_addr)
+ {
+ grub_dhcp6_options_free (options);
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, "Bad DHCPv6 Packet");
+ }
+
+ FOR_DHCP6_SESSIONS (se)
+ {
+ if (se->transaction_id == v6h->transaction_id &&
+ grub_memcmp (options->client_duid, &se->duid, sizeof (se->duid)) == 0 &&
+ se->iaid == options->iaid)
+ break;
+ }
+
+ if (!se)
+ {
+ grub_dprintf ("bootp", "DHCPv6 session not found\n");
+ grub_dhcp6_options_free (options);
+ return GRUB_ERR_NONE;
+ }
+
+ if (v6h->message_type == GRUB_NET_DHCP6_ADVERTISE)
+ {
+ if (se->adv)
+ {
+ grub_dprintf ("bootp", "Skipped DHCPv6 Advertised .. \n");
+ grub_dhcp6_options_free (options);
+ return GRUB_ERR_NONE;
+ }
+
+ se->adv = options;
+ return grub_dhcp6_session_send_request (se);
+ }
+ else if (v6h->message_type == GRUB_NET_DHCP6_REPLY)
+ {
+ if (!se->adv)
+ {
+ grub_dprintf ("bootp", "Skipped DHCPv6 Reply .. \n");
+ grub_dhcp6_options_free (options);
+ return GRUB_ERR_NONE;
+ }
+
+ se->reply = options;
+ grub_dhcp6_session_configure_network (se);
+ grub_dhcp6_session_remove (se);
+ return GRUB_ERR_NONE;
+ }
+ else
+ {
+ grub_dhcp6_options_free (options);
+ }
+
+ return GRUB_ERR_NONE;
+}
+
static grub_err_t
grub_cmd_dhcpopt (struct grub_command *cmd __attribute__ ((unused)),
int argc, char **args)
@@ -903,7 +1638,174 @@
return err;
}
-static grub_command_t cmd_getdhcp, cmd_bootp, cmd_dhcp;
+static grub_err_t
+grub_cmd_bootp6 (struct grub_command *cmd __attribute__ ((unused)),
+ int argc, char **args)
+{
+ struct grub_net_card *card;
+ grub_uint32_t iaid = 0;
+ int interval;
+ grub_err_t err;
+ grub_dhcp6_session_t se;
+
+ err = GRUB_ERR_NONE;
+
+ FOR_NET_CARDS (card)
+ {
+ struct grub_net_network_level_interface *iface;
+
+ if (argc > 0 && grub_strcmp (card->name, args[0]) != 0)
+ continue;
+
+ iface = grub_net_ipv6_get_link_local (card, &card->default_address);
+ if (!iface)
+ {
+ grub_dhcp6_session_remove_all ();
+ return grub_errno;
+ }
+
+ grub_dhcp6_session_add (iface, iaid++);
+ }
+
+ for (interval = 200; interval < 10000; interval *= 2)
+ {
+ int done = 1;
+
+ FOR_DHCP6_SESSIONS (se)
+ {
+ struct grub_net_buff *nb;
+ struct grub_net_dhcp6_option *opt;
+ struct grub_net_dhcp6_packet *v6h;
+ struct grub_net_dhcp6_option_duid_ll *duid;
+ struct grub_net_dhcp6_option_iana *ia_na;
+ grub_net_network_level_address_t multicast;
+ grub_net_link_level_address_t ll_multicast;
+ struct udphdr *udph;
+
+ multicast.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
+ multicast.ipv6[0] = grub_cpu_to_be64_compile_time (0xff02ULL << 48);
+ multicast.ipv6[1] = grub_cpu_to_be64_compile_time (0x10002ULL);
+
+ err = grub_net_link_layer_resolve (se->iface,
+ &multicast, &ll_multicast);
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ return err;
+ }
+
+ nb = grub_netbuff_alloc (GRUB_DHCP6_DEFAULT_NETBUFF_ALLOC_SIZE);
+
+ if (!nb)
+ {
+ grub_dhcp6_session_remove_all ();
+ return grub_errno;
+ }
+
+ err = grub_netbuff_reserve (nb, GRUB_DHCP6_DEFAULT_NETBUFF_ALLOC_SIZE);
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ err = grub_netbuff_push (nb, sizeof (*opt) + sizeof (grub_uint16_t));
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ opt = (struct grub_net_dhcp6_option *)nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_ELAPSED_TIME);
+ opt->len = grub_cpu_to_be16_compile_time (sizeof (grub_uint16_t));
+ grub_set_unaligned16 (opt->data, 0);
+
+ err = grub_netbuff_push (nb, sizeof (*opt) + sizeof (*duid));
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ opt = (struct grub_net_dhcp6_option *)nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_CLIENTID);
+ opt->len = grub_cpu_to_be16 (sizeof (*duid));
+
+ duid = (struct grub_net_dhcp6_option_duid_ll *) opt->data;
+ grub_memcpy (duid, &se->duid, sizeof (*duid));
+
+ err = grub_netbuff_push (nb, sizeof (*opt) + sizeof (*ia_na));
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ opt = (struct grub_net_dhcp6_option *)nb->data;
+ opt->code = grub_cpu_to_be16_compile_time (GRUB_NET_DHCP6_OPTION_IA_NA);
+ opt->len = grub_cpu_to_be16 (sizeof (*ia_na));
+ ia_na = (struct grub_net_dhcp6_option_iana *)opt->data;
+ ia_na->iaid = grub_cpu_to_be32 (se->iaid);
+ ia_na->t1 = 0;
+ ia_na->t2 = 0;
+
+ err = grub_netbuff_push (nb, sizeof (*v6h));
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ v6h = (struct grub_net_dhcp6_packet *)nb->data;
+ v6h->message_type = GRUB_NET_DHCP6_SOLICIT;
+ v6h->transaction_id = se->transaction_id;
+
+ grub_netbuff_push (nb, sizeof (*udph));
+
+ udph = (struct udphdr *) nb->data;
+ udph->src = grub_cpu_to_be16_compile_time (DHCP6_CLIENT_PORT);
+ udph->dst = grub_cpu_to_be16_compile_time (DHCP6_SERVER_PORT);
+ udph->chksum = 0;
+ udph->len = grub_cpu_to_be16 (nb->tail - nb->data);
+
+ udph->chksum = grub_net_ip_transport_checksum (nb, GRUB_NET_IP_UDP,
+ &se->iface->address, &multicast);
+
+ err = grub_net_send_ip_packet (se->iface, &multicast,
+ &ll_multicast, nb, GRUB_NET_IP_UDP);
+ done = 0;
+ grub_netbuff_free (nb);
+
+ if (err)
+ {
+ grub_dhcp6_session_remove_all ();
+ return err;
+ }
+ }
+ if (!done)
+ grub_net_poll_cards (interval, 0);
+ }
+
+ FOR_DHCP6_SESSIONS (se)
+ {
+ grub_error_push ();
+ err = grub_error (GRUB_ERR_FILE_NOT_FOUND,
+ N_("couldn't autoconfigure %s"),
+ se->iface->card->name);
+ }
+
+ grub_dhcp6_session_remove_all ();
+
+ return err;
+}
+
+static grub_command_t cmd_getdhcp, cmd_bootp, cmd_dhcp, cmd_bootp6;
void
grub_bootp_init (void)
@@ -917,6 +1819,9 @@
cmd_getdhcp = grub_register_command ("net_get_dhcp_option", grub_cmd_dhcpopt,
N_("VAR INTERFACE NUMBER DESCRIPTION"),
N_("retrieve DHCP option and save it into VAR. If VAR is - then print the value."));
+ cmd_bootp6 = grub_register_command ("net_bootp6", grub_cmd_bootp6,
+ N_("[CARD]"),
+ N_("perform a DHCPv6 autoconfiguration"));
}
void
@@ -925,4 +1830,5 @@
grub_unregister_command (cmd_getdhcp);
grub_unregister_command (cmd_bootp);
grub_unregister_command (cmd_dhcp);
+ grub_unregister_command (cmd_bootp6);
}
--- a/grub-core/net/ip.c
+++ b/grub-core/net/ip.c
@@ -240,6 +240,45 @@
{
struct udphdr *udph;
udph = (struct udphdr *) nb->data;
+
+ if (proto == GRUB_NET_IP_UDP && udph->dst == grub_cpu_to_be16_compile_time (DHCP6_CLIENT_PORT))
+ {
+ if (udph->chksum)
+ {
+ grub_uint16_t chk, expected;
+ chk = udph->chksum;
+ udph->chksum = 0;
+ expected = grub_net_ip_transport_checksum (nb,
+ GRUB_NET_IP_UDP,
+ source,
+ dest);
+ if (expected != chk)
+ {
+ grub_dprintf ("net", "Invalid UDP checksum. "
+ "Expected %x, got %x\n",
+ grub_be_to_cpu16 (expected),
+ grub_be_to_cpu16 (chk));
+ grub_netbuff_free (nb);
+ return GRUB_ERR_NONE;
+ }
+ udph->chksum = chk;
+ }
+
+ err = grub_netbuff_pull (nb, sizeof (*udph));
+ if (err)
+ {
+ grub_netbuff_free (nb);
+ return err;
+ }
+
+ err = grub_net_process_dhcp6 (nb, card);
+ if (err)
+ grub_print_error ();
+
+ grub_netbuff_free (nb);
+ return GRUB_ERR_NONE;
+ }
+
if (proto == GRUB_NET_IP_UDP && grub_be_to_cpu16 (udph->dst) == 68)
{
const struct grub_net_bootp_packet *bootp;
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -450,6 +450,66 @@
grub_uint8_t vendor[0];
} GRUB_PACKED;
+struct grub_net_dhcp6_packet
+{
+ grub_uint32_t message_type:8;
+ grub_uint32_t transaction_id:24;
+ grub_uint8_t dhcp_options[0];
+} GRUB_PACKED;
+
+struct grub_net_dhcp6_option {
+ grub_uint16_t code;
+ grub_uint16_t len;
+ grub_uint8_t data[0];
+} GRUB_PACKED;
+
+struct grub_net_dhcp6_option_iana {
+ grub_uint32_t iaid;
+ grub_uint32_t t1;
+ grub_uint32_t t2;
+ grub_uint8_t data[0];
+} GRUB_PACKED;
+
+struct grub_net_dhcp6_option_iaaddr {
+ grub_uint8_t addr[16];
+ grub_uint32_t preferred_lifetime;
+ grub_uint32_t valid_lifetime;
+ grub_uint8_t data[0];
+} GRUB_PACKED;
+
+struct grub_net_dhcp6_option_duid_ll
+{
+ grub_uint16_t type;
+ grub_uint16_t hw_type;
+ grub_uint8_t hwaddr[6];
+} GRUB_PACKED;
+
+enum
+ {
+ GRUB_NET_DHCP6_SOLICIT = 1,
+ GRUB_NET_DHCP6_ADVERTISE = 2,
+ GRUB_NET_DHCP6_REQUEST = 3,
+ GRUB_NET_DHCP6_REPLY = 7
+ };
+
+enum
+ {
+ DHCP6_CLIENT_PORT = 546,
+ DHCP6_SERVER_PORT = 547
+ };
+
+enum
+ {
+ GRUB_NET_DHCP6_OPTION_CLIENTID = 1,
+ GRUB_NET_DHCP6_OPTION_SERVERID = 2,
+ GRUB_NET_DHCP6_OPTION_IA_NA = 3,
+ GRUB_NET_DHCP6_OPTION_IAADDR = 5,
+ GRUB_NET_DHCP6_OPTION_ORO = 6,
+ GRUB_NET_DHCP6_OPTION_ELAPSED_TIME = 8,
+ GRUB_NET_DHCP6_OPTION_DNS_SERVERS = 23,
+ GRUB_NET_DHCP6_OPTION_BOOTFILE_URL = 59
+ };
+
#define GRUB_NET_BOOTP_RFC1048_MAGIC_0 0x63
#define GRUB_NET_BOOTP_RFC1048_MAGIC_1 0x82
#define GRUB_NET_BOOTP_RFC1048_MAGIC_2 0x53
@@ -485,6 +545,14 @@
grub_size_t size,
int is_def, char **device, char **path);
+struct grub_net_network_level_interface *
+grub_net_configure_by_dhcpv6_reply (const char *name,
+ struct grub_net_card *card,
+ grub_net_interface_flags_t flags,
+ const struct grub_net_dhcp6_packet *v6,
+ grub_size_t size,
+ int is_def, char **device, char **path);
+
grub_err_t
grub_net_add_ipv4_local (struct grub_net_network_level_interface *inf,
int mask);
@@ -493,6 +561,10 @@
grub_net_process_dhcp (struct grub_net_buff *nb,
struct grub_net_network_level_interface *iface);
+grub_err_t
+grub_net_process_dhcp6 (struct grub_net_buff *nb,
+ struct grub_net_card *card);
+
int
grub_net_hwaddr_cmp (const grub_net_link_level_address_t *a,
const grub_net_link_level_address_t *b);
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