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/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2011 Denys Vlasenko.
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#ifndef UDHCP_D6_COMMON_H
#define UDHCP_D6_COMMON_H 1
#include <netinet/ip6.h>
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
/*** DHCPv6 packet ***/
/* DHCPv6 protocol. See RFC 3315 */
#define D6_MSG_SOLICIT 1
#define D6_MSG_ADVERTISE 2
#define D6_MSG_REQUEST 3
#define D6_MSG_CONFIRM 4
#define D6_MSG_RENEW 5
#define D6_MSG_REBIND 6
#define D6_MSG_REPLY 7
#define D6_MSG_RELEASE 8
#define D6_MSG_DECLINE 9
#define D6_MSG_RECONFIGURE 10
#define D6_MSG_INFORMATION_REQUEST 11
#define D6_MSG_RELAY_FORW 12
#define D6_MSG_RELAY_REPL 13
struct d6_packet {
union {
uint8_t d6_msg_type;
uint32_t d6_xid32;
} d6_u;
uint8_t d6_options[576 - sizeof(struct iphdr) - sizeof(struct udphdr) - 4
+ CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
} PACKED;
#define d6_msg_type d6_u.d6_msg_type
#define d6_xid32 d6_u.d6_xid32
struct ip6_udp_d6_packet {
struct ip6_hdr ip6;
struct udphdr udp;
struct d6_packet data;
} PACKED;
struct udp_d6_packet {
struct udphdr udp;
struct d6_packet data;
} PACKED;
/*** Options ***/
struct d6_option {
uint8_t code_hi;
uint8_t code;
uint8_t len_hi;
uint8_t len;
uint8_t data[1];
} PACKED;
#define D6_OPT_CLIENTID 1
#define D6_OPT_SERVERID 2
#define D6_OPT_IA_NA 3
#define D6_OPT_IA_TA 4
#define D6_OPT_IAADDR 5
#define D6_OPT_ORO 6
#define D6_OPT_PREFERENCE 7
#define D6_OPT_ELAPSED_TIME 8
#define D6_OPT_RELAY_MSG 9
#define D6_OPT_AUTH 11
#define D6_OPT_UNICAST 12
#define D6_OPT_STATUS_CODE 13
#define D6_OPT_RAPID_COMMIT 14
#define D6_OPT_USER_CLASS 15
#define D6_OPT_VENDOR_CLASS 16
#define D6_OPT_VENDOR_OPTS 17
#define D6_OPT_INTERFACE_ID 18
#define D6_OPT_RECONF_MSG 19
#define D6_OPT_RECONF_ACCEPT 20
#define D6_OPT_DNS_SERVERS 23
#define D6_OPT_DOMAIN_LIST 24
#define D6_OPT_IA_PD 25
#define D6_OPT_IAPREFIX 26
/* RFC 4704 "The DHCPv6 Client FQDN Option"
* uint16 option-code OPTION_CLIENT_FQDN (39)
* uint16 option-len 1 + length of domain name
* uint8 flags
* char[] domain-name partial or fully qualified domain name
*
* Flags format is |MBZ|N|O|S|
* The "S" bit indicates whether the server SHOULD or SHOULD NOT perform
* the AAAA RR (FQDN-to-address) DNS updates. A client sets the bit to
* 0 to indicate that the server SHOULD NOT perform the updates and 1 to
* indicate that the server SHOULD perform the updates. The state of
* the bit in the reply from the server indicates the action to be taken
* by the server; if it is 1, the server has taken responsibility for
* AAAA RR updates for the FQDN.
* The "O" bit indicates whether the server has overridden the client's
* preference for the "S" bit. A client MUST set this bit to 0. A
* server MUST set this bit to 1 if the "S" bit in its reply to the
* client does not match the "S" bit received from the client.
* The "N" bit indicates whether the server SHOULD NOT perform any DNS
* updates. A client sets this bit to 0 to request that the server
* SHOULD perform updates (the PTR RR and possibly the AAAA RR based on
* the "S" bit) or to 1 to request that the server SHOULD NOT perform
* any DNS updates. A server sets the "N" bit to indicate whether the
* server SHALL (0) or SHALL NOT (1) perform DNS updates. If the "N"
* bit is 1, the "S" bit MUST be 0.
*
* If a client knows only part of its name, it MAY send a name that is not
* fully qualified, indicating that it knows part of the name but does not
* necessarily know the zone in which the name is to be embedded.
* To send a fully qualified domain name, the Domain Name field is set
* to the DNS-encoded domain name including the terminating zero-length
* label. To send a partial name, the Domain Name field is set to the
* DNS-encoded domain name without the terminating zero-length label.
* A client MAY also leave the Domain Name field empty if it desires the
* server to provide a name.
*/
#define D6_OPT_CLIENT_FQDN 39
#define D6_OPT_TZ_POSIX 41
#define D6_OPT_TZ_NAME 42
/*** Other shared functions ***/
struct client6_data_t {
struct d6_option *server_id;
struct d6_option *ia_na;
struct d6_option *ia_pd;
char **env_ptr;
unsigned env_idx;
/* link-local IPv6 address */
struct in6_addr ll_ip6;
};
#define client6_data (*(struct client6_data_t*)(&bb_common_bufsiz1[COMMON_BUFSIZE - sizeof(struct client6_data_t)]))
int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_addr *nip6, uint8_t *mac);
int FAST_FUNC d6_listen_socket(int port, const char *inf);
int FAST_FUNC d6_recv_kernel_packet(
struct in6_addr *peer_ipv6,
struct d6_packet *packet, int fd
);
int FAST_FUNC d6_send_raw_packet(
struct d6_packet *d6_pkt, unsigned d6_pkt_size,
struct in6_addr *src_ipv6, int source_port,
struct in6_addr *dst_ipv6, int dest_port, const uint8_t *dest_arp,
int ifindex
);
int FAST_FUNC d6_send_kernel_packet(
struct d6_packet *d6_pkt, unsigned d6_pkt_size,
struct in6_addr *src_ipv6, int source_port,
struct in6_addr *dst_ipv6, int dest_port,
int ifindex
);
#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
void FAST_FUNC d6_dump_packet(struct d6_packet *packet);
#else
# define d6_dump_packet(packet) ((void)0)
#endif
POP_SAVED_FUNCTION_VISIBILITY
#endif
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