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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> Last-Update: 2021-09-24 Patch-Name: bootp-new-net_bootp6-command.patch
This commit is contained in:
Michael Chang
Colin Watson
parent
c7e2338904
commit
2ce72d9b58
@ -24,6 +24,98 @@
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#include <grub/net/netbuff.h>
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#include <grub/net/udp.h>
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#include <grub/datetime.h>
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#include <grub/time.h>
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#include <grub/list.h>
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static int
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dissect_url (const char *url, char **proto, char **host, char **path)
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{
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const char *p, *ps;
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grub_size_t l;
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*proto = *host = *path = NULL;
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ps = p = url;
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while ((p = grub_strchr (p, ':')))
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{
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if (grub_strlen (p) < sizeof ("://") - 1)
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break;
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if (grub_memcmp (p, "://", sizeof ("://") - 1) == 0)
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{
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l = p - ps;
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*proto = grub_malloc (l + 1);
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if (!*proto)
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{
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grub_print_error ();
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return 0;
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}
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grub_memcpy (*proto, ps, l);
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(*proto)[l] = '\0';
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p += sizeof ("://") - 1;
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break;
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}
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++p;
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}
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if (!*proto)
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{
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grub_dprintf ("bootp", "url: %s is not valid, protocol not found\n", url);
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return 0;
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}
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ps = p;
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p = grub_strchr (p, '/');
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if (!p)
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{
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grub_dprintf ("bootp", "url: %s is not valid, host/path not found\n", url);
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grub_free (*proto);
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*proto = NULL;
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return 0;
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}
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l = p - ps;
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if (l > 2 && ps[0] == '[' && ps[l - 1] == ']')
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{
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*host = grub_malloc (l - 1);
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if (!*host)
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{
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grub_print_error ();
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grub_free (*proto);
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*proto = NULL;
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return 0;
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}
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grub_memcpy (*host, ps + 1, l - 2);
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(*host)[l - 2] = 0;
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}
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else
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{
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*host = grub_malloc (l + 1);
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if (!*host)
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{
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grub_print_error ();
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grub_free (*proto);
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*proto = NULL;
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return 0;
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}
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grub_memcpy (*host, ps, l);
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(*host)[l] = 0;
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}
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*path = grub_strdup (p);
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if (!*path)
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{
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grub_print_error ();
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grub_free (*host);
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grub_free (*proto);
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*host = NULL;
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*proto = NULL;
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return 0;
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}
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return 1;
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}
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struct grub_dhcp_discover_options
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{
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@ -607,6 +699,578 @@ out:
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return err;
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}
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/* The default netbuff size for sending DHCPv6 packets which should be
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large enough to hold the information */
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#define GRUB_DHCP6_DEFAULT_NETBUFF_ALLOC_SIZE 512
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struct grub_dhcp6_options
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{
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grub_uint8_t *client_duid;
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grub_uint16_t client_duid_len;
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grub_uint8_t *server_duid;
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grub_uint16_t server_duid_len;
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grub_uint32_t iaid;
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grub_uint32_t t1;
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grub_uint32_t t2;
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grub_net_network_level_address_t *ia_addr;
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grub_uint32_t preferred_lifetime;
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grub_uint32_t valid_lifetime;
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grub_net_network_level_address_t *dns_server_addrs;
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grub_uint16_t num_dns_server;
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char *boot_file_proto;
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char *boot_file_server_ip;
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char *boot_file_path;
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};
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typedef struct grub_dhcp6_options *grub_dhcp6_options_t;
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struct grub_dhcp6_session
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{
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struct grub_dhcp6_session *next;
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struct grub_dhcp6_session **prev;
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grub_uint32_t iaid;
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grub_uint32_t transaction_id:24;
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grub_uint64_t start_time;
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struct grub_net_dhcp6_option_duid_ll duid;
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struct grub_net_network_level_interface *iface;
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/* The associated dhcpv6 options */
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grub_dhcp6_options_t adv;
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grub_dhcp6_options_t reply;
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};
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typedef struct grub_dhcp6_session *grub_dhcp6_session_t;
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typedef void (*dhcp6_option_hook_fn) (const struct grub_net_dhcp6_option *opt, void *data);
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static void
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foreach_dhcp6_option (const struct grub_net_dhcp6_option *opt, grub_size_t size,
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dhcp6_option_hook_fn hook, void *hook_data);
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static void
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parse_dhcp6_iaaddr (const struct grub_net_dhcp6_option *opt, void *data)
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{
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grub_dhcp6_options_t dhcp6 = (grub_dhcp6_options_t )data;
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grub_uint16_t code = grub_be_to_cpu16 (opt->code);
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grub_uint16_t len = grub_be_to_cpu16 (opt->len);
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if (code == GRUB_NET_DHCP6_OPTION_IAADDR)
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{
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const struct grub_net_dhcp6_option_iaaddr *iaaddr;
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iaaddr = (const struct grub_net_dhcp6_option_iaaddr *)opt->data;
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if (len < sizeof (*iaaddr))
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{
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grub_dprintf ("bootp", "DHCPv6: code %u with insufficient length %u\n", code, len);
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return;
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}
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if (!dhcp6->ia_addr)
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{
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dhcp6->ia_addr = grub_malloc (sizeof(*dhcp6->ia_addr));
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dhcp6->ia_addr->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
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dhcp6->ia_addr->ipv6[0] = grub_get_unaligned64 (iaaddr->addr);
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dhcp6->ia_addr->ipv6[1] = grub_get_unaligned64 (iaaddr->addr + 8);
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dhcp6->preferred_lifetime = grub_be_to_cpu32 (iaaddr->preferred_lifetime);
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dhcp6->valid_lifetime = grub_be_to_cpu32 (iaaddr->valid_lifetime);
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}
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}
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}
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static void
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parse_dhcp6_option (const struct grub_net_dhcp6_option *opt, void *data)
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{
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grub_dhcp6_options_t dhcp6 = (grub_dhcp6_options_t)data;
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grub_uint16_t code = grub_be_to_cpu16 (opt->code);
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grub_uint16_t len = grub_be_to_cpu16 (opt->len);
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switch (code)
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{
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case GRUB_NET_DHCP6_OPTION_CLIENTID:
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if (dhcp6->client_duid || !len)
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{
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grub_dprintf ("bootp", "Skipped DHCPv6 CLIENTID with length %u\n", len);
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break;
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}
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dhcp6->client_duid = grub_malloc (len);
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grub_memcpy (dhcp6->client_duid, opt->data, len);
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dhcp6->client_duid_len = len;
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break;
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case GRUB_NET_DHCP6_OPTION_SERVERID:
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if (dhcp6->server_duid || !len)
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{
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grub_dprintf ("bootp", "Skipped DHCPv6 SERVERID with length %u\n", len);
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break;
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}
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dhcp6->server_duid = grub_malloc (len);
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grub_memcpy (dhcp6->server_duid, opt->data, len);
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dhcp6->server_duid_len = len;
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break;
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case GRUB_NET_DHCP6_OPTION_IA_NA:
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{
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const struct grub_net_dhcp6_option_iana *ia_na;
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grub_uint16_t data_len;
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if (dhcp6->iaid || len < sizeof (*ia_na))
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{
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grub_dprintf ("bootp", "Skipped DHCPv6 IA_NA with length %u\n", len);
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break;
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}
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ia_na = (const struct grub_net_dhcp6_option_iana *)opt->data;
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dhcp6->iaid = grub_be_to_cpu32 (ia_na->iaid);
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dhcp6->t1 = grub_be_to_cpu32 (ia_na->t1);
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dhcp6->t2 = grub_be_to_cpu32 (ia_na->t2);
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data_len = len - sizeof (*ia_na);
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if (data_len)
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foreach_dhcp6_option ((const struct grub_net_dhcp6_option *)ia_na->data, data_len, parse_dhcp6_iaaddr, dhcp6);
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}
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break;
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case GRUB_NET_DHCP6_OPTION_DNS_SERVERS:
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{
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const grub_uint8_t *po;
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grub_uint16_t ln;
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grub_net_network_level_address_t *la;
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if (!len || len & 0xf)
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{
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grub_dprintf ("bootp", "Skip invalid length DHCPv6 DNS_SERVERS \n");
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break;
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}
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dhcp6->num_dns_server = ln = len >> 4;
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dhcp6->dns_server_addrs = la = grub_calloc (ln, sizeof (*la));
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for (po = opt->data; ln > 0; po += 0x10, la++, ln--)
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{
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la->type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
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la->ipv6[0] = grub_get_unaligned64 (po);
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la->ipv6[1] = grub_get_unaligned64 (po + 8);
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la->option = DNS_OPTION_PREFER_IPV6;
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}
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}
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break;
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case GRUB_NET_DHCP6_OPTION_BOOTFILE_URL:
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dissect_url ((const char *)opt->data,
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&dhcp6->boot_file_proto,
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&dhcp6->boot_file_server_ip,
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&dhcp6->boot_file_path);
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break;
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default:
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break;
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}
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}
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static void
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foreach_dhcp6_option (const struct grub_net_dhcp6_option *opt, grub_size_t size, dhcp6_option_hook_fn hook, void *hook_data)
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{
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while (size)
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{
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grub_uint16_t code, len;
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if (size < sizeof (*opt))
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{
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grub_dprintf ("bootp", "DHCPv6: Options stopped with remaining size %" PRIxGRUB_SIZE "\n", size);
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break;
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}
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size -= sizeof (*opt);
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len = grub_be_to_cpu16 (opt->len);
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code = grub_be_to_cpu16 (opt->code);
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if (size < len)
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{
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grub_dprintf ("bootp", "DHCPv6: Options stopped at out of bound length %u for option %u\n", len, code);
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break;
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}
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if (!len)
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{
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grub_dprintf ("bootp", "DHCPv6: Options stopped at zero length option %u\n", code);
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break;
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}
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else
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{
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if (hook)
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hook (opt, hook_data);
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size -= len;
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opt = (const struct grub_net_dhcp6_option *)((grub_uint8_t *)opt + len + sizeof (*opt));
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}
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}
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}
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static grub_dhcp6_options_t
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grub_dhcp6_options_get (const struct grub_net_dhcp6_packet *v6h,
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grub_size_t size)
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{
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grub_dhcp6_options_t options;
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if (size < sizeof (*v6h))
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE, N_("DHCPv6 packet size too small"));
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return NULL;
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}
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options = grub_zalloc (sizeof(*options));
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if (!options)
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return NULL;
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foreach_dhcp6_option ((const struct grub_net_dhcp6_option *)v6h->dhcp_options,
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size - sizeof (*v6h), parse_dhcp6_option, options);
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return options;
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}
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static void
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grub_dhcp6_options_free (grub_dhcp6_options_t options)
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{
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if (options->client_duid)
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grub_free (options->client_duid);
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if (options->server_duid)
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grub_free (options->server_duid);
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if (options->ia_addr)
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grub_free (options->ia_addr);
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if (options->dns_server_addrs)
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grub_free (options->dns_server_addrs);
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if (options->boot_file_proto)
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grub_free (options->boot_file_proto);
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if (options->boot_file_server_ip)
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grub_free (options->boot_file_server_ip);
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if (options->boot_file_path)
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grub_free (options->boot_file_path);
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grub_free (options);
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}
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static grub_dhcp6_session_t grub_dhcp6_sessions;
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#define FOR_DHCP6_SESSIONS(var) FOR_LIST_ELEMENTS (var, grub_dhcp6_sessions)
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static void
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grub_net_configure_by_dhcp6_info (const char *name,
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struct grub_net_card *card,
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grub_dhcp6_options_t dhcp6,
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int is_def,
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int flags,
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struct grub_net_network_level_interface **ret_inf)
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{
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grub_net_network_level_netaddress_t netaddr;
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struct grub_net_network_level_interface *inf;
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if (dhcp6->ia_addr)
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{
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inf = grub_net_add_addr (name, card, dhcp6->ia_addr, &card->default_address, flags);
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netaddr.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
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netaddr.ipv6.base[0] = dhcp6->ia_addr->ipv6[0];
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netaddr.ipv6.base[1] = 0;
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netaddr.ipv6.masksize = 64;
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grub_net_add_route (name, netaddr, inf);
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if (ret_inf)
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*ret_inf = inf;
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}
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if (dhcp6->dns_server_addrs)
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{
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grub_uint16_t i;
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for (i = 0; i < dhcp6->num_dns_server; ++i)
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grub_net_add_dns_server (dhcp6->dns_server_addrs + i);
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}
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if (dhcp6->boot_file_path)
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grub_env_set_net_property (name, "boot_file", dhcp6->boot_file_path,
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grub_strlen (dhcp6->boot_file_path));
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if (is_def && dhcp6->boot_file_server_ip)
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{
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grub_net_default_server = grub_strdup (dhcp6->boot_file_server_ip);
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grub_env_set ("net_default_interface", name);
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grub_env_export ("net_default_interface");
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}
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}
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static void
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grub_dhcp6_session_add (struct grub_net_network_level_interface *iface,
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grub_uint32_t iaid)
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{
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grub_dhcp6_session_t se;
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struct grub_datetime date;
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grub_err_t err;
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grub_int64_t t = 0;
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se = grub_malloc (sizeof (*se));
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err = grub_get_datetime (&date);
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if (err || !grub_datetime2unixtime (&date, &t))
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{
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grub_errno = GRUB_ERR_NONE;
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t = 0;
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}
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se->iface = iface;
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se->iaid = iaid;
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se->transaction_id = t;
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se->start_time = grub_get_time_ms ();
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se->duid.type = grub_cpu_to_be16_compile_time (3) ;
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se->duid.hw_type = grub_cpu_to_be16_compile_time (1);
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grub_memcpy (&se->duid.hwaddr, &iface->hwaddress.mac, sizeof (se->duid.hwaddr));
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se->adv = NULL;
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se->reply = NULL;
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grub_list_push (GRUB_AS_LIST_P (&grub_dhcp6_sessions), GRUB_AS_LIST (se));
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}
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static void
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grub_dhcp6_session_remove (grub_dhcp6_session_t se)
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{
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grub_list_remove (GRUB_AS_LIST (se));
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if (se->adv)
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grub_dhcp6_options_free (se->adv);
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if (se->reply)
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grub_dhcp6_options_free (se->reply);
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grub_free (se);
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}
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static void
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grub_dhcp6_session_remove_all (void)
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{
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grub_dhcp6_session_t se;
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FOR_DHCP6_SESSIONS (se)
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{
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grub_dhcp6_session_remove (se);
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se = grub_dhcp6_sessions;
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}
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}
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static grub_err_t
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grub_dhcp6_session_configure_network (grub_dhcp6_session_t se)
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{
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char *name;
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|
||||
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
|
||||
@ -675,6 +1339,77 @@ 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 grub_err_t
|
||||
grub_cmd_dhcpopt (struct grub_command *cmd __attribute__ ((unused)),
|
||||
int argc, char **args)
|
||||
@ -900,7 +1635,174 @@ grub_cmd_bootp (struct grub_command *cmd __attribute__ ((unused)),
|
||||
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)
|
||||
@ -914,6 +1816,9 @@ 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
|
||||
@ -922,4 +1827,5 @@ grub_bootp_fini (void)
|
||||
grub_unregister_command (cmd_getdhcp);
|
||||
grub_unregister_command (cmd_bootp);
|
||||
grub_unregister_command (cmd_dhcp);
|
||||
grub_unregister_command (cmd_bootp6);
|
||||
}
|
||||
|
||||
@ -239,6 +239,45 @@ 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;
|
||||
|
||||
@ -448,6 +448,66 @@ 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
|
||||
@ -483,6 +543,14 @@ 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);
|
||||
@ -491,6 +559,10 @@ void
|
||||
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);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user