ip_options.c File Reference

#include <sys/cdefs.h>
#include "opt_ipstealth.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/route/nhop.h>
#include <net/netisr.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/in_fib.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/ip_var.h>
#include <netinet/ip_options.h>
#include <netinet/ip_icmp.h>
#include <machine/in_cksum.h>
#include <sys/socketvar.h>

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Macros
#define	V_ip_dosourceroute   VNET(ip_dosourceroute)
#define	V_ip_acceptsourceroute   VNET(ip_acceptsourceroute)
#define	INA   struct in_ifaddr *
#define	SA   struct sockaddr *
#define	OPTSIZ   (sizeof(opts->ip_srcrt.nop) + sizeof(opts->ip_srcrt.srcopt))

Functions
	__FBSDID ("$FreeBSD$")
	VNET_DEFINE_STATIC (int, ip_dosourceroute)
	SYSCTL_INT (_net_inet_ip, IPCTL_SOURCEROUTE, sourceroute, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(ip_dosourceroute), 0, "Enable forwarding source routed IP packets")
	VNET_DEFINE_STATIC (int, ip_acceptsourceroute)
	SYSCTL_INT (_net_inet_ip, IPCTL_ACCEPTSOURCEROUTE, accept_sourceroute, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(ip_acceptsourceroute), 0, "Enable accepting source routed IP packets")
	VNET_DEFINE (int, ip_doopts)
	SYSCTL_INT (_net_inet_ip, OID_AUTO, process_options, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(ip_doopts), 0, "Enable IP options processing ([LS]SRR, RR, TS)")
static void	save_rte (struct mbuf *m, u_char *, struct in_addr)
int	ip_dooptions (struct mbuf *m, int pass)
struct mbuf *	ip_srcroute (struct mbuf *m0)
void	ip_stripoptions (struct mbuf *m)
struct mbuf *	ip_insertoptions (struct mbuf *m, struct mbuf *opt, int *phlen)
int	ip_optcopy (struct ip *ip, struct ip *jp)
int	ip_pcbopts (struct inpcb *inp, int optname, struct mbuf *m)
int	ip_checkrouteralert (struct mbuf *m)

Macro Definition Documentation

INA

#define INA   struct in_ifaddr *

OPTSIZ

#define OPTSIZ   (sizeof(opts->ip_srcrt.nop) + sizeof(opts->ip_srcrt.srcopt))

SA

#define SA   struct sockaddr *

V_ip_acceptsourceroute

#define V_ip_acceptsourceroute   VNET(ip_acceptsourceroute)

Definition at line 82 of file ip_options.c.

V_ip_dosourceroute

#define V_ip_dosourceroute   VNET(ip_dosourceroute)

Definition at line 76 of file ip_options.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

ip_checkrouteralert()

int ip_checkrouteralert

(

struct mbuf *

m

)

Definition at line 718 of file ip_options.c.

References ip::ip_hl, IPOPT_EOL, IPOPT_NOP, IPOPT_OFFSET, IPOPT_OLEN, IPOPT_OPTVAL, and IPOPT_RA.

Referenced by igmp_input().

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ip_dooptions()

int ip_dooptions	(	struct mbuf *	m,
		int	pass
	)

Definition at line 103 of file ip_options.c.

References fib4_lookup(), IA_SIN, icmp_error(), ICMP_PARAMPROB, ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB, ICMP_UNREACH_HOST, ICMP_UNREACH_SRCFAIL, INA, inet_ntoa_r(), ip::ip_dst, ip_forward(), ip::ip_hl, IPOPT_EOL, IPOPT_LSRR, IPOPT_MINOFF, IPOPT_NOP, IPOPT_OFFSET, IPOPT_OLEN, IPOPT_OPTVAL, IPOPT_RR, IPOPT_SSRR, IPOPT_TS, IPOPT_TS_PRESPEC, IPOPT_TS_TSANDADDR, IPOPT_TS_TSONLY, IPSTAT_INC, iptime(), in_addr::s_addr, SA, save_rte(), sockaddr_in::sin_addr, V_ip_acceptsourceroute, V_ip_doopts, V_ip_dosourceroute, and V_ipforwarding.

Referenced by ip_input().

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ip_insertoptions()

struct mbuf * ip_insertoptions	(	struct mbuf *	m,
		struct mbuf *	opt,
		int *	phlen
	)

Definition at line 507 of file ip_options.c.

References ip::ip_dst, ip::ip_hl, ip::ip_len, IP_MAXPACKET, ip::ip_v, ipoption::ipopt_dst, ipoption::ipopt_list, IPVERSION, and in_addr::s_addr.

Referenced by ip_output().

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ip_optcopy()

int ip_optcopy	(	struct ip *	ip,
		struct ip *	jp
	)

Definition at line 557 of file ip_options.c.

References ip::ip_hl, IPOPT_COPIED, IPOPT_EOL, IPOPT_NOP, and IPOPT_OLEN.

Referenced by ip_fragment().

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ip_pcbopts()

int ip_pcbopts	(	struct inpcb *	inp,
		int	optname,
		struct mbuf *	m
	)

Definition at line 601 of file ip_options.c.

References inpcb::inp_options, INP_WLOCK_ASSERT, IPOPT_EOL, IPOPT_LSRR, IPOPT_MINOFF, IPOPT_NOP, IPOPT_OFFSET, IPOPT_OLEN, IPOPT_OPTVAL, IPOPT_SSRR, and MAX_IPOPTLEN.

Referenced by ip_ctloutput().

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ip_srcroute()

struct mbuf * ip_srcroute

(

struct mbuf *

m0

)

Definition at line 426 of file ip_options.c.

References ipoptrt::dst, ipopt_tag::ip_nhops, ipopt_tag::ip_srcrt, IPOPT_MINOFF, IPOPT_NOP, IPOPT_OFFSET, ipoptrt::nop, OPTSIZ, ipoptrt::route, and ipoptrt::srcopt.

Referenced by ip_savecontrol(), syncache_add(), and syncache_socket().

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ip_stripoptions()

void ip_stripoptions

(

struct mbuf *

m

)

Definition at line 483 of file ip_options.c.

References ip::ip_hl, and ip::ip_len.

Referenced by tcp_input_with_port().

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save_rte()

static void save_rte ( struct mbuf *  m, u_char *  option, struct in_addr  dst  )

static

Definition at line 399 of file ip_options.c.

References ipoptrt::dst, ipopt_tag::ip_nhops, ipopt_tag::ip_srcrt, IPOPT_OFFSET, IPOPT_OLEN, and ipoptrt::srcopt.

Referenced by ip_dooptions().

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SYSCTL_INT() [1/3]

SYSCTL_INT	(	_net_inet_ip	,
		IPCTL_ACCEPTSOURCEROUTE	,
		accept_sourceroute	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEip_acceptsourceroute,
		0	,
		"Enable accepting source routed IP packets"
	)

SYSCTL_INT() [2/3]

SYSCTL_INT	(	_net_inet_ip	,
		IPCTL_SOURCEROUTE	,
		sourceroute	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEip_dosourceroute,
		0	,
		"Enable forwarding source routed IP packets"
	)

SYSCTL_INT() [3/3]

SYSCTL_INT	(	_net_inet_ip	,
		OID_AUTO	,
		process_options	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEip_doopts,
		0	,
		"Enable IP options processing ([LS]SRR, RR, TS)"
	)

VNET_DEFINE()

VNET_DEFINE	(	int	,
		ip_doopts
	)

VNET_DEFINE_STATIC() [1/2]

VNET_DEFINE_STATIC	(	int	,
		ip_acceptsourceroute
	)

VNET_DEFINE_STATIC() [2/2]

VNET_DEFINE_STATIC	(	int	,
		ip_dosourceroute
	)