diff options
Diffstat (limited to 'networking/udhcp/common.h')
| -rw-r--r-- | networking/udhcp/common.h | 182 |
1 files changed, 142 insertions, 40 deletions
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h index d740ca5..2ce6759 100644 --- a/networking/udhcp/common.h +++ b/networking/udhcp/common.h @@ -15,17 +15,14 @@ PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN -#define DEFAULT_SCRIPT CONFIG_UDHCPC_DEFAULT_SCRIPT - extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */ -/*** packet.h ***/ + +/*** DHCP packet ***/ /* DHCP protocol. See RFC 2131 */ #define DHCP_MAGIC 0x63825363 - #define DHCP_OPTIONS_BUFSIZE 308 - #define BOOTREQUEST 1 #define BOOTREPLY 2 @@ -67,6 +64,116 @@ struct BUG_bad_sizeof_struct_ip_udp_dhcp_packet { [(sizeof(struct ip_udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1]; }; + +/*** Options ***/ + +enum { + OPTION_IP = 1, + OPTION_IP_PAIR, + OPTION_STRING, +#if ENABLE_FEATURE_UDHCP_RFC3397 + OPTION_STR1035, /* RFC1035 compressed domain name list */ +#endif + OPTION_BOOLEAN, + OPTION_U8, + OPTION_U16, + OPTION_S16, + OPTION_U32, + OPTION_S32, + OPTION_STATIC_ROUTES, + + OPTION_TYPE_MASK = 0x0f, + /* Client requests this option by default */ + OPTION_REQ = 0x10, + /* There can be a list of 1 or more of these */ + OPTION_LIST = 0x20, +}; + +/* DHCP option codes (partial list). See RFC 2132 and + * http://www.iana.org/assignments/bootp-dhcp-parameters/ + * Commented out options are handled by common option machinery, + * uncommented ones have spacial cases (grep for them to see). + */ +#define DHCP_PADDING 0x00 +#define DHCP_SUBNET 0x01 +//#define DHCP_TIME_OFFSET 0x02 /* (localtime - UTC_time) in seconds. signed */ +//#define DHCP_ROUTER 0x03 +//#define DHCP_TIME_SERVER 0x04 /* RFC 868 time server (32-bit, 0 = 1.1.1900) */ +//#define DHCP_NAME_SERVER 0x05 /* IEN 116 _really_ ancient kind of NS */ +//#define DHCP_DNS_SERVER 0x06 +//#define DHCP_LOG_SERVER 0x07 /* port 704 UDP log (not syslog) +//#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" server */ +//#define DHCP_LPR_SERVER 0x09 +#define DHCP_HOST_NAME 0x0c /* either client informs server or server gives name to client */ +//#define DHCP_BOOT_SIZE 0x0d +//#define DHCP_DOMAIN_NAME 0x0f /* server gives domain suffix */ +//#define DHCP_SWAP_SERVER 0x10 +//#define DHCP_ROOT_PATH 0x11 +//#define DHCP_IP_TTL 0x17 +//#define DHCP_MTU 0x1a +//#define DHCP_BROADCAST 0x1c +//#define DHCP_NIS_DOMAIN 0x28 +//#define DHCP_NIS_SERVER 0x29 +//#define DHCP_NTP_SERVER 0x2a +//#define DHCP_WINS_SERVER 0x2c +#define DHCP_REQUESTED_IP 0x32 /* sent by client if specific IP is wanted */ +#define DHCP_LEASE_TIME 0x33 +#define DHCP_OPTION_OVERLOAD 0x34 +#define DHCP_MESSAGE_TYPE 0x35 +#define DHCP_SERVER_ID 0x36 /* by default server's IP */ +#define DHCP_PARAM_REQ 0x37 /* list of options client wants */ +//#define DHCP_ERR_MESSAGE 0x38 /* error message when sending NAK etc */ +#define DHCP_MAX_SIZE 0x39 +#define DHCP_VENDOR 0x3c /* client's vendor (a string) */ +#define DHCP_CLIENT_ID 0x3d /* by default client's MAC addr, but may be arbitrarily long */ +//#define DHCP_TFTP_SERVER_NAME 0x42 /* same as 'sname' field */ +//#define DHCP_BOOT_FILE 0x43 /* same as 'file' field */ +//#define DHCP_USER_CLASS 0x4d /* RFC 3004. set of LASCII strings. "I am a printer" etc */ +#define DHCP_FQDN 0x51 /* client asks to update DNS to map its FQDN to its new IP */ +//#define DHCP_DOMAIN_SEARCH 0x77 /* RFC 3397. set of ASCIZ string, DNS-style compressed */ +//#define DHCP_STATIC_ROUTES 0x79 /* RFC 3442. (mask,ip,router) tuples */ +//#define DHCP_WPAD 0xfc /* MSIE's Web Proxy Autodiscovery Protocol */ +#define DHCP_END 0xff + +/* Offsets in option byte sequence */ +#define OPT_CODE 0 +#define OPT_LEN 1 +#define OPT_DATA 2 +/* Bits in "overload" option */ +#define OPTION_FIELD 0 +#define FILE_FIELD 1 +#define SNAME_FIELD 2 + +/* DHCP_MESSAGE_TYPE values */ +#define DHCPDISCOVER 1 /* client -> server */ +#define DHCPOFFER 2 /* client <- server */ +#define DHCPREQUEST 3 /* client -> server */ +#define DHCPDECLINE 4 /* client -> server */ +#define DHCPACK 5 /* client <- server */ +#define DHCPNAK 6 /* client <- server */ +#define DHCPRELEASE 7 /* client -> server */ +#define DHCPINFORM 8 /* client -> server */ +#define DHCP_MINTYPE DHCPDISCOVER +#define DHCP_MAXTYPE DHCPINFORM + +struct dhcp_option { + uint8_t flags; + uint8_t code; +}; + +extern const struct dhcp_option dhcp_options[]; +extern const char dhcp_option_strings[]; +extern const uint8_t dhcp_option_lengths[]; + +uint8_t *udhcp_get_option(struct dhcp_packet *packet, int code) FAST_FUNC; +int udhcp_end_option(uint8_t *optionptr) FAST_FUNC; +void udhcp_add_option_string(uint8_t *optionptr, uint8_t *string) FAST_FUNC; +void udhcp_add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) FAST_FUNC; +#if ENABLE_FEATURE_UDHCP_RFC3397 +char *dname_dec(const uint8_t *cstr, int clen, const char *pre) FAST_FUNC; +uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen) FAST_FUNC; +#endif + // RFC 2131 Table 5: Fields and options used by DHCP clients // // Field DHCPDISCOVER DHCPREQUEST DHCPDECLINE, @@ -132,6 +239,33 @@ struct BUG_bad_sizeof_struct_ip_udp_dhcp_packet { // All others MAY MAY MUST NOT +/*** Logging ***/ + +#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 +extern unsigned dhcp_verbose; +# define log1(...) do { if (dhcp_verbose >= 1) bb_info_msg(__VA_ARGS__); } while (0) +# if CONFIG_UDHCP_DEBUG >= 2 +void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC; +# define log2(...) do { if (dhcp_verbose >= 2) bb_info_msg(__VA_ARGS__); } while (0) +# else +# define udhcp_dump_packet(...) ((void)0) +# define log2(...) ((void)0) +# endif +# if CONFIG_UDHCP_DEBUG >= 3 +# define log3(...) do { if (dhcp_verbose >= 3) bb_info_msg(__VA_ARGS__); } while (0) +# else +# define log3(...) ((void)0) +# endif +#else +# define udhcp_dump_packet(...) ((void)0) +# define log1(...) ((void)0) +# define log2(...) ((void)0) +# define log3(...) ((void)0) +#endif + + +/*** Other shared functions ***/ + uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC; void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC; @@ -147,24 +281,14 @@ int udhcp_send_kernel_packet(struct dhcp_packet *dhcp_pkt, uint32_t source_ip, int source_port, uint32_t dest_ip, int dest_port) FAST_FUNC; - -/**/ - -void udhcp_run_script(struct dhcp_packet *packet, const char *name) FAST_FUNC; - -// Still need to clean these up... - -/* from options.h */ -#define get_option udhcp_get_option -#define end_option udhcp_end_option -#define add_option_string udhcp_add_option_string -#define add_simple_option udhcp_add_simple_option - void udhcp_sp_setup(void) FAST_FUNC; int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC; int udhcp_sp_read(const fd_set *rfds) FAST_FUNC; + int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC; + int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC; + /* Returns 1 if no reply received */ int arpping(uint32_t test_nip, const uint8_t *safe_mac, @@ -172,28 +296,6 @@ int arpping(uint32_t test_nip, uint8_t *from_mac, const char *interface) FAST_FUNC; -#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 -extern unsigned dhcp_verbose; -# define log1(...) do { if (dhcp_verbose >= 1) bb_info_msg(__VA_ARGS__); } while (0) -# if CONFIG_UDHCP_DEBUG >= 2 -void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC; -# define log2(...) do { if (dhcp_verbose >= 2) bb_info_msg(__VA_ARGS__); } while (0) -# else -# define udhcp_dump_packet(...) ((void)0) -# define log2(...) ((void)0) -# endif -# if CONFIG_UDHCP_DEBUG >= 3 -# define log3(...) do { if (dhcp_verbose >= 3) bb_info_msg(__VA_ARGS__); } while (0) -# else -# define log3(...) ((void)0) -# endif -#else -# define udhcp_dump_packet(...) ((void)0) -# define log1(...) ((void)0) -# define log2(...) ((void)0) -# define log3(...) ((void)0) -#endif - POP_SAVED_FUNCTION_VISIBILITY #endif |