udhcp: merge options.h into common.h, script.c into dhcpc.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 142 insertions, 40 deletions

diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index d740ca56c..2ce67598d 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