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    Contents of /trunk/mkinitrd-magellan/busybox/networking/udhcp/common.h

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    Revision 984 - (show annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
    File MIME type: text/plain
    File size: 4321 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    1 /* vi: set sw=4 ts=4: */
    2 /* common.h
    3 *
    4 * Russ Dill <Russ.Dill@asu.edu> September 2001
    5 * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
    6 *
    7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    8 */
    9 #ifndef UDHCP_COMMON_H
    10 #define UDHCP_COMMON_H 1
    11
    12 #include "libbb.h"
    13 #include <netinet/udp.h>
    14 #include <netinet/ip.h>
    15
    16 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
    17
    18 #define DEFAULT_SCRIPT CONFIG_UDHCPC_DEFAULT_SCRIPT
    19
    20 extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
    21
    22 /*** packet.h ***/
    23
    24 #define DHCP_OPTIONS_BUFSIZE 308
    25
    26 //TODO: rename ciaddr/yiaddr/chaddr
    27 struct dhcp_packet {
    28 uint8_t op; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
    29 uint8_t htype; /* hardware address type. 1 = 10mb ethernet */
    30 uint8_t hlen; /* hardware address length */
    31 uint8_t hops; /* used by relay agents only */
    32 uint32_t xid; /* unique id */
    33 uint16_t secs; /* elapsed since client began acquisition/renewal */
    34 uint16_t flags; /* only one flag so far: */
    35 #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
    36 uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
    37 uint32_t yiaddr; /* 'your' (client) IP address */
    38 /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */
    39 uint32_t siaddr_nip;
    40 uint32_t gateway_nip; /* relay agent IP address */
    41 uint8_t chaddr[16]; /* link-layer client hardware address (MAC) */
    42 uint8_t sname[64]; /* server host name (ASCIZ) */
    43 uint8_t file[128]; /* boot file name (ASCIZ) */
    44 uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */
    45 uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
    46 } PACKED;
    47
    48 struct ip_udp_dhcp_packet {
    49 struct iphdr ip;
    50 struct udphdr udp;
    51 struct dhcp_packet data;
    52 } PACKED;
    53
    54 /* Let's see whether compiler understood us right */
    55 struct BUG_bad_sizeof_struct_ip_udp_dhcp_packet {
    56 char BUG_bad_sizeof_struct_ip_udp_dhcp_packet
    57 [(sizeof(struct ip_udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1];
    58 };
    59
    60 uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC;
    61
    62 void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC;
    63
    64 /*int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd); - in dhcpc.h */
    65 int udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd) FAST_FUNC;
    66
    67 int udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt,
    68 uint32_t source_ip, int source_port,
    69 uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
    70 int ifindex) FAST_FUNC;
    71
    72 int udhcp_send_kernel_packet(struct dhcp_packet *dhcp_pkt,
    73 uint32_t source_ip, int source_port,
    74 uint32_t dest_ip, int dest_port) FAST_FUNC;
    75
    76
    77 /**/
    78
    79 void udhcp_run_script(struct dhcp_packet *packet, const char *name) FAST_FUNC;
    80
    81 // Still need to clean these up...
    82
    83 /* from options.h */
    84 #define get_option udhcp_get_option
    85 #define end_option udhcp_end_option
    86 #define add_option_string udhcp_add_option_string
    87 #define add_simple_option udhcp_add_simple_option
    88
    89 void udhcp_sp_setup(void) FAST_FUNC;
    90 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
    91 int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
    92 int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC;
    93 int udhcp_raw_socket(int ifindex) FAST_FUNC;
    94 int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
    95 /* Returns 1 if no reply received */
    96 int arpping(uint32_t test_nip,
    97 const uint8_t *safe_mac,
    98 uint32_t from_ip,
    99 uint8_t *from_mac,
    100 const char *interface) FAST_FUNC;
    101
    102 #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
    103 extern unsigned dhcp_verbose;
    104 # define log1(...) do { if (dhcp_verbose >= 1) bb_info_msg(__VA_ARGS__); } while (0)
    105 # if CONFIG_UDHCP_DEBUG >= 2
    106 void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC;
    107 # define log2(...) do { if (dhcp_verbose >= 2) bb_info_msg(__VA_ARGS__); } while (0)
    108 # else
    109 # define udhcp_dump_packet(...) ((void)0)
    110 # define log2(...) ((void)0)
    111 # endif
    112 # if CONFIG_UDHCP_DEBUG >= 3
    113 # define log3(...) do { if (dhcp_verbose >= 3) bb_info_msg(__VA_ARGS__); } while (0)
    114 # else
    115 # define log3(...) ((void)0)
    116 # endif
    117 #else
    118 # define udhcp_dump_packet(...) ((void)0)
    119 # define log1(...) ((void)0)
    120 # define log2(...) ((void)0)
    121 # define log3(...) ((void)0)
    122 #endif
    123
    124 POP_SAVED_FUNCTION_VISIBILITY
    125
    126 #endif