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grub2
0003-bootp-New-net_bootp6-command.patch
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File 0003-bootp-New-net_bootp6-command.patch of Package grub2
From f6c8c7985fd88fc89cd49227c9e74feaf58cfdd6 Mon Sep 17 00:00:00 2001 From: Michael Chang <mchang@suse.com> 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 <mchang@suse.com> Signed-off-by: Ken Lin <ken.lin@hpe.com> --- grub-core/net/bootp.c | 908 +++++++++++++++++++++++++++++++++++++++++++++++++- grub-core/net/ip.c | 39 +++ include/grub/net.h | 72 ++++ 3 files changed, 1018 insertions(+), 1 deletion(-) diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c index 189551a..81173b4 100644 --- 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; +} static void parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask) @@ -266,6 +358,578 @@ grub_net_configure_by_dhcp_ack (const char *name, return inter; } +/* 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_zalloc (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_int32_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; +} + void grub_net_process_dhcp (struct grub_net_buff *nb, struct grub_net_card *card) @@ -298,6 +962,77 @@ grub_net_process_dhcp (struct grub_net_buff *nb, } } +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 char hexdigit (grub_uint8_t val) { @@ -578,7 +1313,174 @@ grub_cmd_bootp (struct grub_command *cmd __attribute__ ((unused)), return err; } -static grub_command_t cmd_getdhcp, cmd_bootp; +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_bootp6; void grub_bootp_init (void) @@ -589,6 +1491,9 @@ grub_bootp_init (void) 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 @@ -596,4 +1501,5 @@ grub_bootp_fini (void) { grub_unregister_command (cmd_getdhcp); grub_unregister_command (cmd_bootp); + grub_unregister_command (cmd_bootp6); } diff --git a/grub-core/net/ip.c b/grub-core/net/ip.c index 8c56baa..2a239b5 100644 --- a/grub-core/net/ip.c +++ b/grub-core/net/ip.c @@ -238,6 +238,45 @@ handle_dgram (struct grub_net_buff *nb, { 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; diff --git a/include/grub/net.h b/include/grub/net.h index ccc169c..38a3973 100644 --- a/include/grub/net.h +++ b/include/grub/net.h @@ -442,6 +442,66 @@ struct grub_net_bootp_packet 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 @@ -468,6 +528,14 @@ grub_net_configure_by_dhcp_ack (const char *name, 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); @@ -476,6 +544,10 @@ void grub_net_process_dhcp (struct grub_net_buff *nb, struct grub_net_card *card); +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); -- 2.6.6
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