dhcp.h File Reference

#include "common.h"
#include "buffer.h"
#include "proto.h"
#include "tun.h"

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Data Structures
struct	dhcp
struct	dhcp_full

Macros
#define	DHCP_PAD   0
#define	DHCP_ROUTER   3
#define	DHCP_DOMAIN_SERVER   6
#define	DHCP_DOMAIN_NAME   15
#define	DHCP_NTP_SERVER   42
#define	DHCP_VENDOR   43
#define	DHCP_NETBIOS_DOMAIN_SERVER   44
#define	DHCP_NETBIOS_DIST_SERVER   45
#define	DHCP_NETBIOS_NODE_TYPE   46
#define	DHCP_NETBIOS_SCOPE   47
#define	DHCP_MSG_TYPE   53
#define	DHCP_DOMAIN_SEARCH   119
#define	DHCP_END   255
#define	DHCPDISCOVER   1
#define	DHCPOFFER   2
#define	DHCPREQUEST   3
#define	DHCPDECLINE   4
#define	DHCPACK   5
#define	DHCPNAK   6
#define	DHCPRELEASE   7
#define	DHCPINFORM   8
#define	BOOTPS_PORT   67
#define	BOOTPC_PORT   68
#define	BOOTREQUEST   1
#define	BOOTREPLY   2
#define	DHCP_OPTIONS_BUFFER_SIZE   256

Functions
in_addr_t	dhcp_extract_router_msg (struct buffer *ipbuf)
bool	build_dhcp_options_string (struct buffer *buf, const struct tuntap_options *o)

Macro Definition Documentation

BOOTPC_PORT

#define BOOTPC_PORT   68

Definition at line 59 of file dhcp.h.

Referenced by dhcp_extract_router_msg().

BOOTPS_PORT

#define BOOTPS_PORT   67

Definition at line 58 of file dhcp.h.

Referenced by dhcp_extract_router_msg().

BOOTREPLY

#define BOOTREPLY   2

Definition at line 64 of file dhcp.h.

Referenced by dhcp_extract_router_msg().

BOOTREQUEST

#define BOOTREQUEST   1

Definition at line 63 of file dhcp.h.

DHCP_DOMAIN_NAME

#define DHCP_DOMAIN_NAME   15

Definition at line 36 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_DOMAIN_SEARCH

#define DHCP_DOMAIN_SEARCH   119

Definition at line 44 of file dhcp.h.

Referenced by build_dhcp_options_string(), and test_write_dhcp_search_str().

DHCP_DOMAIN_SERVER

#define DHCP_DOMAIN_SERVER   6

Definition at line 35 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_END

#define DHCP_END   255

Definition at line 45 of file dhcp.h.

Referenced by do_extract(), and get_dhcp_message_type().

DHCP_MSG_TYPE

#define DHCP_MSG_TYPE   53

Definition at line 43 of file dhcp.h.

Referenced by get_dhcp_message_type().

DHCP_NETBIOS_DIST_SERVER

#define DHCP_NETBIOS_DIST_SERVER   45

Definition at line 40 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_NETBIOS_DOMAIN_SERVER

#define DHCP_NETBIOS_DOMAIN_SERVER   44

Definition at line 39 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_NETBIOS_NODE_TYPE

#define DHCP_NETBIOS_NODE_TYPE   46

Definition at line 41 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_NETBIOS_SCOPE

#define DHCP_NETBIOS_SCOPE   47

Definition at line 42 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_NTP_SERVER

#define DHCP_NTP_SERVER   42

Definition at line 37 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCP_OPTIONS_BUFFER_SIZE

#define DHCP_OPTIONS_BUFFER_SIZE   256

Definition at line 88 of file dhcp.h.

DHCP_PAD

#define DHCP_PAD   0

Definition at line 33 of file dhcp.h.

Referenced by do_extract(), and get_dhcp_message_type().

DHCP_ROUTER

#define DHCP_ROUTER   3

Definition at line 34 of file dhcp.h.

Referenced by do_extract().

DHCP_VENDOR

#define DHCP_VENDOR   43

Definition at line 38 of file dhcp.h.

Referenced by build_dhcp_options_string().

DHCPACK

#define DHCPACK   5

Definition at line 52 of file dhcp.h.

Referenced by dhcp_extract_router_msg().

DHCPDECLINE

#define DHCPDECLINE   4

Definition at line 51 of file dhcp.h.

DHCPDISCOVER

#define DHCPDISCOVER   1

Definition at line 48 of file dhcp.h.

DHCPINFORM

#define DHCPINFORM   8

Definition at line 55 of file dhcp.h.

DHCPNAK

#define DHCPNAK   6

Definition at line 53 of file dhcp.h.

DHCPOFFER

#define DHCPOFFER   2

Definition at line 49 of file dhcp.h.

Referenced by dhcp_extract_router_msg().

DHCPRELEASE

#define DHCPRELEASE   7

Definition at line 54 of file dhcp.h.

DHCPREQUEST

#define DHCPREQUEST   3

Definition at line 50 of file dhcp.h.

Function Documentation

build_dhcp_options_string()

bool build_dhcp_options_string	(	struct buffer *	buf,
		const struct tuntap_options *	o )

Definition at line 331 of file dhcp.c.

References buf_safe(), buf_write_u32(), buf_write_u8(), DHCP_DOMAIN_NAME, DHCP_DOMAIN_SEARCH, DHCP_DOMAIN_SERVER, DHCP_NETBIOS_DIST_SERVER, DHCP_NETBIOS_DOMAIN_SERVER, DHCP_NETBIOS_NODE_TYPE, DHCP_NETBIOS_SCOPE, DHCP_NTP_SERVER, DHCP_VENDOR, tuntap_options::disable_nbt, tuntap_options::dns, tuntap_options::dns_len, tuntap_options::domain, tuntap_options::domain_search_list, tuntap_options::domain_search_list_len, M_WARN, msg, tuntap_options::nbdd, tuntap_options::nbdd_len, tuntap_options::netbios_node_type, tuntap_options::netbios_scope, tuntap_options::ntp, tuntap_options::ntp_len, tuntap_options::wins, tuntap_options::wins_len, write_dhcp_search_str(), write_dhcp_str(), write_dhcp_u32_array(), and write_dhcp_u8().

Referenced by tuntap_dhcp_mask().

dhcp_extract_router_msg()

in_addr_t dhcp_extract_router_msg

(

struct buffer *

ipbuf

)

Definition at line 148 of file dhcp.c.

References BLEN, BOOTPC_PORT, BOOTPS_PORT, BOOTREPLY, BPTR, openvpn_udphdr::check, D_ROUTE, openvpn_iphdr::daddr, openvpn_udphdr::dest, dhcp_full::dhcp, DHCPACK, DHCPOFFER, do_extract(), gc, gc_free(), gc_new(), get_dhcp_message_type(), dhcp_full::ip, ip_checksum(), msg, dhcp::op, OPENVPN_IPPROTO_UDP, print_in_addr_t(), openvpn_iphdr::protocol, openvpn_iphdr::saddr, openvpn_udphdr::source, and dhcp_full::udp.

Referenced by process_ip_header().