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

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    Revision 816 - (show annotations) (download)
    Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
    File MIME type: text/plain
    File size: 3681 byte(s) 
    -updated to busybox-1.13.4
    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
    10 #ifndef _COMMON_H
    11 #define _COMMON_H
    12
    13 #include "libbb.h"
    14 #include <netinet/udp.h>
    15 #include <netinet/ip.h>
    16
    17 #if __GNUC_PREREQ(4,1)
    18 # pragma GCC visibility push(hidden)
    19 #endif
    20
    21 #define DEFAULT_SCRIPT CONFIG_UDHCPC_DEFAULT_SCRIPT
    22
    23 extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
    24
    25 /*** packet.h ***/
    26
    27 #define DHCP_OPTIONS_BUFSIZE 308
    28
    29 struct dhcpMessage {
    30 uint8_t op; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
    31 uint8_t htype; /* hardware address type. 1 = 10mb ethernet */
    32 uint8_t hlen; /* hardware address length */
    33 uint8_t hops; /* used by relay agents only */
    34 uint32_t xid; /* unique id */
    35 uint16_t secs; /* elapsed since client began acquisition/renewal */
    36 uint16_t flags; /* only one flag so far: */
    37 #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
    38 uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
    39 uint32_t yiaddr; /* 'your' (client) IP address */
    40 uint32_t siaddr; /* IP address of next server to use in bootstrap,
    41 * returned in DHCPOFFER, DHCPACK by server */
    42 uint32_t giaddr; /* relay agent IP address */
    43 uint8_t chaddr[16];/* link-layer client hardware address (MAC) */
    44 uint8_t sname[64]; /* server host name (ASCIZ) */
    45 uint8_t file[128]; /* boot file name (ASCIZ) */
    46 uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */
    47 uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
    48 } PACKED;
    49
    50 struct udp_dhcp_packet {
    51 struct iphdr ip;
    52 struct udphdr udp;
    53 struct dhcpMessage data;
    54 } PACKED;
    55
    56 /* Let's see whether compiler understood us right */
    57 struct BUG_bad_sizeof_struct_udp_dhcp_packet {
    58 char BUG_bad_sizeof_struct_udp_dhcp_packet
    59 [(sizeof(struct udp_dhcp_packet) != 576 + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS) ? -1 : 1];
    60 };
    61
    62 uint16_t udhcp_checksum(void *addr, int count) FAST_FUNC;
    63
    64 void udhcp_init_header(struct dhcpMessage *packet, char type) FAST_FUNC;
    65
    66 /*int udhcp_recv_raw_packet(struct dhcpMessage *payload, int fd); - in dhcpc.h */
    67 int udhcp_recv_kernel_packet(struct dhcpMessage *packet, int fd) FAST_FUNC;
    68
    69 int udhcp_send_raw_packet(struct dhcpMessage *payload,
    70 uint32_t source_ip, int source_port,
    71 uint32_t dest_ip, int dest_port, const uint8_t *dest_arp,
    72 int ifindex) FAST_FUNC;
    73
    74 int udhcp_send_kernel_packet(struct dhcpMessage *payload,
    75 uint32_t source_ip, int source_port,
    76 uint32_t dest_ip, int dest_port) FAST_FUNC;
    77
    78
    79 /**/
    80
    81 void udhcp_run_script(struct dhcpMessage *packet, const char *name) FAST_FUNC;
    82
    83 // Still need to clean these up...
    84
    85 /* from options.h */
    86 #define get_option udhcp_get_option
    87 #define end_option udhcp_end_option
    88 #define add_option_string udhcp_add_option_string
    89 #define add_simple_option udhcp_add_simple_option
    90
    91 void udhcp_sp_setup(void) FAST_FUNC;
    92 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
    93 int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
    94 int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp) FAST_FUNC;
    95 int udhcp_raw_socket(int ifindex) FAST_FUNC;
    96 int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
    97 /* Returns 1 if no reply received */
    98 int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface) FAST_FUNC;
    99
    100 #if ENABLE_UDHCP_DEBUG
    101 # define DEBUG(str, args...) bb_info_msg("### " str, ## args)
    102 #else
    103 # define DEBUG(str, args...) do {;} while (0)
    104 #endif
    105
    106 #if __GNUC_PREREQ(4,1)
    107 # pragma GCC visibility pop
    108 #endif
    109
    110 #endif