dhcp.c File Reference

#include "syshead.h"
#include "dhcp.h"
#include "socket_util.h"
#include "error.h"
#include "memdbg.h"

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Functions
static int	get_dhcp_message_type (const struct dhcp *dhcp, const int optlen)
static in_addr_t	do_extract (struct dhcp *dhcp, int optlen)
in_addr_t	dhcp_extract_router_msg (struct buffer *ipbuf)
static void	write_dhcp_u8 (struct buffer *buf, const uint8_t type, const uint8_t data, bool *error)
static void	write_dhcp_u32_array (struct buffer *buf, const uint8_t type, const uint32_t *data, const unsigned int len, bool *error)
static void	write_dhcp_str (struct buffer *buf, const uint8_t type, const char *str, bool *error)
static void	write_dhcp_search_str (struct buffer *buf, const uint8_t type, const char *const *str_array, int array_len, bool *error)
bool	build_dhcp_options_string (struct buffer *buf, const struct tuntap_options *o)

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().

do_extract()

in_addr_t do_extract ( struct dhcp * dhcp, int optlen )

static

Definition at line 76 of file dhcp.c.

References DHCP_END, DHCP_PAD, and DHCP_ROUTER.

Referenced by dhcp_extract_router_msg().

get_dhcp_message_type()

int get_dhcp_message_type ( const struct dhcp * dhcp, const int optlen )

static

Definition at line 36 of file dhcp.c.

References DHCP_END, DHCP_MSG_TYPE, and DHCP_PAD.

Referenced by dhcp_extract_router_msg().

write_dhcp_search_str()

void write_dhcp_search_str ( struct buffer * buf, const uint8_t type, const char *const * str_array, int array_len, bool * error )

static

Definition at line 269 of file dhcp.c.

References buf_safe(), buf_write(), buf_write_u8(), M_WARN, and msg.

Referenced by build_dhcp_options_string(), and test_write_dhcp_search_str().

write_dhcp_str()

void write_dhcp_str ( struct buffer * buf, const uint8_t type, const char * str, bool * error )

static

Definition at line 240 of file dhcp.c.

References buf_safe(), buf_write(), buf_write_u8(), M_WARN, and msg.

Referenced by build_dhcp_options_string().

write_dhcp_u32_array()

void write_dhcp_u32_array ( struct buffer * buf, const uint8_t type, const uint32_t * data, const unsigned int len, bool * error )

static

Definition at line 211 of file dhcp.c.

References buf_safe(), buf_write_u32(), buf_write_u8(), M_WARN, and msg.

Referenced by build_dhcp_options_string().

write_dhcp_u8()

void write_dhcp_u8 ( struct buffer * buf, const uint8_t type, const uint8_t data, bool * error )

static

Definition at line 197 of file dhcp.c.

References buf_safe(), buf_write_u8(), M_WARN, and msg.

Referenced by build_dhcp_options_string().