dnsd: fix a number of bugs. Ideas by Ming-Ching Tiew (mctiew AT yahoo.com)

[oweals/busybox.git] / networking / udhcp / options.h

diff --git a/networking/udhcp/options.h b/networking/udhcp/options.h
index 1b179f17383f967763ae6f32410f000f0506a6e3..23370da6e45cfc21a488fbe4c3c76d0f5abc667f 100644 (file)
--- a/networking/udhcp/options.h
+++ b/networking/udhcp/options.h
@@ -1,14 +1,19 @@
 /* vi: set sw=4 ts=4: */
 /* options.h */
-#ifndef _OPTIONS_H
-#define _OPTIONS_H
+#ifndef UDHCP_OPTIONS_H
+#define UDHCP_OPTIONS_H 1
 
-#define TYPE_MASK      0x0F
+PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
+
+#define TYPE_MASK       0x0F
 
 enum {
-       OPTION_IP=1,
+       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,
@@ -17,21 +22,93 @@ enum {
        OPTION_S32
 };
 
-#define OPTION_REQ     0x10 /* have the client request this option */
-#define OPTION_LIST    0x20 /* There can be a list of 1 or more of these */
+#define OPTION_REQ      0x10 /* have the client request this option */
+#define OPTION_LIST     0x20 /* There can be a list of 1 or more of these */
+
+/*****************************************************************/
+/* Do not modify below here unless you know what you are doing!! */
+/*****************************************************************/
+
+/* DHCP protocol -- see RFC 2131 */
+#define DHCP_MAGIC             0x63825363
+
+/* DHCP option codes (partial list) */
+#define DHCP_PADDING            0x00
+#define DHCP_SUBNET             0x01
+#define DHCP_TIME_OFFSET        0x02
+#define DHCP_ROUTER             0x03
+#define DHCP_TIME_SERVER        0x04
+#define DHCP_NAME_SERVER        0x05
+#define DHCP_DNS_SERVER         0x06
+#define DHCP_LOG_SERVER         0x07
+#define DHCP_COOKIE_SERVER      0x08
+#define DHCP_LPR_SERVER         0x09
+#define DHCP_HOST_NAME          0x0c
+#define DHCP_BOOT_SIZE          0x0d
+#define DHCP_DOMAIN_NAME        0x0f
+#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_NTP_SERVER         0x2a
+#define DHCP_WINS_SERVER        0x2c
+#define DHCP_REQUESTED_IP       0x32
+#define DHCP_LEASE_TIME         0x33
+#define DHCP_OPTION_OVERLOAD    0x34
+#define DHCP_MESSAGE_TYPE       0x35
+#define DHCP_SERVER_ID          0x36
+#define DHCP_PARAM_REQ          0x37
+#define DHCP_MESSAGE            0x38
+#define DHCP_MAX_SIZE           0x39
+#define DHCP_T1                 0x3a
+#define DHCP_T2                 0x3b
+#define DHCP_VENDOR             0x3c
+#define DHCP_CLIENT_ID          0x3d
+#define DHCP_FQDN               0x51
+#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
+
+#define BOOTREQUEST             1
+#define BOOTREPLY               2
+
+#define ETH_10MB                1
+#define ETH_10MB_LEN            6
+
+#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 */
 
 struct dhcp_option {
-       char name[12];
-       char flags;
+       uint8_t flags;
        uint8_t code;
 };
 
-extern struct dhcp_option dhcp_options[];
-extern int option_lengths[];
+extern const struct dhcp_option dhcp_options[];
+extern const char dhcp_option_strings[];
+extern const uint8_t dhcp_option_lengths[];
+
+uint8_t *get_option(struct dhcpMessage *packet, int code) FAST_FUNC;
+int end_option(uint8_t *optionptr) FAST_FUNC;
+int add_option_string(uint8_t *optionptr, uint8_t *string) FAST_FUNC;
+int 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
 
-uint8_t *get_option(struct dhcpMessage *packet, int code);
-int end_option(uint8_t *optionptr);
-int add_option_string(uint8_t *optionptr, uint8_t *string);
-int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data);
+POP_SAVED_FUNCTION_VISIBILITY
 
 #endif