| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /* common.h
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| 3 | *
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| 4 | * Russ Dill <Russ.Dill@asu.edu> September 2001
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| 5 | * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | #ifndef _COMMON_H
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| 11 | #define _COMMON_H
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| 12 |
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| 13 | #include "libbb.h"
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| 14 |
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| 15 | #define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
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| 16 |
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| 17 | extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
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| 18 |
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| 19 | /*** packet.h ***/
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| 20 |
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| 21 | #include <netinet/udp.h>
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| 22 | #include <netinet/ip.h>
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| 23 |
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| 24 | struct dhcpMessage {
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| 25 | uint8_t op;
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| 26 | uint8_t htype;
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| 27 | uint8_t hlen;
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| 28 | uint8_t hops;
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| 29 | uint32_t xid;
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| 30 | uint16_t secs;
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| 31 | uint16_t flags;
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| 32 | uint32_t ciaddr;
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| 33 | uint32_t yiaddr;
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| 34 | uint32_t siaddr;
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| 35 | uint32_t giaddr;
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| 36 | uint8_t chaddr[16];
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| 37 | uint8_t sname[64];
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| 38 | uint8_t file[128];
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| 39 | uint32_t cookie;
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| 40 | uint8_t options[308]; /* 312 - cookie */
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| 41 | };
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| 42 |
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| 43 | struct udp_dhcp_packet {
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| 44 | struct iphdr ip;
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| 45 | struct udphdr udp;
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| 46 | struct dhcpMessage data;
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| 47 | };
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| 48 |
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| 49 | void udhcp_init_header(struct dhcpMessage *packet, char type);
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| 50 | int udhcp_get_packet(struct dhcpMessage *packet, int fd);
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| 51 | uint16_t udhcp_checksum(void *addr, int count);
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| 52 | int udhcp_raw_packet(struct dhcpMessage *payload,
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| 53 | uint32_t source_ip, int source_port,
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| 54 | uint32_t dest_ip, int dest_port,
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| 55 | const uint8_t *dest_arp, int ifindex);
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| 56 | int udhcp_kernel_packet(struct dhcpMessage *payload,
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| 57 | uint32_t source_ip, int source_port,
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| 58 | uint32_t dest_ip, int dest_port);
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| 59 |
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| 60 |
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| 61 | /**/
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| 62 |
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| 63 | void udhcp_run_script(struct dhcpMessage *packet, const char *name);
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| 64 |
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| 65 | // Still need to clean these up...
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| 66 |
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| 67 | /* from options.h */
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| 68 | #define get_option udhcp_get_option
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| 69 | #define end_option udhcp_end_option
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| 70 | #define add_option_string udhcp_add_option_string
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| 71 | #define add_simple_option udhcp_add_simple_option
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| 72 | #define option_lengths udhcp_option_lengths
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| 73 | /* from socket.h */
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| 74 | #define listen_socket udhcp_listen_socket
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| 75 | #define read_interface udhcp_read_interface
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| 76 | /* from dhcpc.h */
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| 77 | #define client_config udhcp_client_config
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| 78 | /* from dhcpd.h */
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| 79 | #define server_config udhcp_server_config
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| 80 |
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| 81 | void udhcp_sp_setup(void);
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| 82 | int udhcp_sp_fd_set(fd_set *rfds, int extra_fd);
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| 83 | int udhcp_sp_read(fd_set *rfds);
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| 84 | int raw_socket(int ifindex);
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| 85 | int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp);
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| 86 | int listen_socket(/*uint32_t ip,*/ int port, const char *inf);
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| 87 | /* Returns 1 if no reply received */
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| 88 | int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface);
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| 89 |
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| 90 | #if ENABLE_FEATURE_UDHCP_DEBUG
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| 91 | # define DEBUG(str, args...) bb_info_msg(str, ## args)
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| 92 | #else
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| 93 | # define DEBUG(str, args...) do {;} while (0)
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| 94 | #endif
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| 95 |
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| 96 | #endif
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