#include <sys/cdefs.h>
#include "opt_bootp.h"
#include "opt_ipstealth.h"
#include "opt_ipsec.h"
#include "opt_route.h"
#include "opt_rss.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/hhook.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/rmlock.h>
#include <sys/rwlock.h>
#include <sys/sdt.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/pfil.h>
#include <net/route.h>
#include <net/route/nhop.h>
#include <net/netisr.h>
#include <net/rss_config.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/in_kdtrace.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/in_fib.h>
#include <netinet/in_pcb.h>
#include <netinet/ip_var.h>
#include <netinet/ip_fw.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_options.h>
#include <machine/in_cksum.h>
#include <netinet/ip_carp.h>
#include <netinet/in_rss.h>
#include <netipsec/ipsec_support.h>
#include <sys/socketvar.h>
#include <security/mac/mac_framework.h>

Include dependency graph for ip_input.c:

Macros
#define	V_ip_strong_es VNET(ip_strong_es)

#define	V_ip_sav VNET(ip_sav)

#define	CHECK_SO_CT(sp, ct) (((sp->so_options & SO_TIMESTAMP) && (sp->so_ts_clock == ct)) ? 1 : 0)

#define	V_ip_rsvp_on VNET(ip_rsvp_on)

Functions
	__FBSDID ("$FreeBSD$")

void	ipreass_init (void)

void	ipreass_drain (void)

void	ipreass_slowtimo (void)

	VNET_DEFINE (int, rsvp_on)

	VNET_DEFINE (int, ipforwarding)

	SYSCTL_INT (_net_inet_ip, IPCTL_FORWARDING, forwarding, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(ipforwarding), 0, "Enable IP forwarding between interfaces")

	VNET_DEFINE (int, ipsendredirects)

	SYSCTL_INT (_net_inet_ip, IPCTL_SENDREDIRECTS, redirect, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(ipsendredirects), 0, "Enable sending IP redirects")

	VNET_DEFINE_STATIC (bool, ip_strong_es)

	SYSCTL_BOOL (_net_inet_ip, OID_AUTO, rfc1122_strong_es, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(ip_strong_es), false, "Packet's IP destination address must match address on arrival interface")

	VNET_DEFINE_STATIC (bool, ip_sav)

	SYSCTL_BOOL (_net_inet_ip, OID_AUTO, source_address_validation, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(ip_sav), true, "Drop incoming packets with source address that is a local address")

	VNET_DEFINE (pfil_head_t, inet_pfil_head)

	VNET_DEFINE (struct in_ifaddrhead, in_ifaddrhead)

	VNET_DEFINE (struct in_ifaddrhashhead *, in_ifaddrhashtbl)

	VNET_DEFINE (u_long, in_ifaddrhmask)

	CTASSERT (sizeof(struct in_ifaddrhashhead)==sizeof(LIST_HEAD(, in_addr)))

	VNET_PCPUSTAT_DEFINE (struct ipstat, ipstat)

	VNET_PCPUSTAT_SYSINIT (ipstat)

	SYSCTL_VNET_PCPUSTAT (_net_inet_ip, IPCTL_STATS, stats, struct ipstat, ipstat, "IP statistics (struct ipstat, netinet/ip_var.h)")

void	kmod_ipstat_inc (int statnum)

void	kmod_ipstat_dec (int statnum)

static int	sysctl_netinet_intr_queue_maxlen (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_net_inet_ip, IPCTL_INTRQMAXLEN, intr_queue_maxlen, CTLTYPE_INT\|CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, 0, sysctl_netinet_intr_queue_maxlen, "I", "Maximum size of the IP input queue")

static int	sysctl_netinet_intr_queue_drops (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_net_inet_ip, IPCTL_INTRQDROPS, intr_queue_drops, CTLTYPE_INT\|CTLFLAG_RD\|CTLFLAG_MPSAFE, 0, 0, sysctl_netinet_intr_queue_drops, "I", "Number of packets dropped from the IP input queue")

static void	ip_vnet_init (void *arg __unused)

	VNET_SYSINIT (ip_vnet_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, ip_vnet_init, NULL)

static void	ip_init (const void *unused __unused)

	SYSINIT (ip_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip_init, NULL)

void	ip_input (struct mbuf *m)

void	ip_slowtimo (void)

void	ip_drain (void)

int	ipproto_register (short ipproto)

int	ipproto_unregister (short ipproto)

void	ip_forward (struct mbuf *m, int srcrt)

void	ip_savecontrol (struct inpcb inp, struct mbuf mp, struct ip ip, struct mbuf *m)

	VNET_DEFINE_STATIC (int, ip_rsvp_on)

	VNET_DEFINE (struct socket *, ip_rsvpd)

int	ip_rsvp_init (struct socket *so)

int	ip_rsvp_done (void)

int	rsvp_input (struct mbuf *mp, int offp, int proto)

Variables
static struct netisr_handler	ip_nh

struct domain	inetdomain

struct protosw	inetsw []

u_char	ip_protox [IPPROTO_MAX]

u_char	inetctlerrmap [PRC_NCMDS]

Macro Definition Documentation

◆ CHECK_SO_CT

#define CHECK_SO_CT	(	sp,
		ct
	)	(((sp->so_options & SO_TIMESTAMP) && (sp->so_ts_clock == ct)) ? 1 : 0)

Definition at line 1146 of file ip_input.c.

◆ V_ip_rsvp_on

#define V_ip_rsvp_on VNET(ip_rsvp_on)

Definition at line 1363 of file ip_input.c.

◆ V_ip_sav

#define V_ip_sav VNET(ip_sav)

Definition at line 127 of file ip_input.c.

◆ V_ip_strong_es

#define V_ip_strong_es VNET(ip_strong_es)

Definition at line 121 of file ip_input.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ CTASSERT()

CTASSERT ( sizeof(struct in_ifaddrhashhead) = =sizeof(LIST_HEAD(, in_addr)) )

◆ ip_drain()

void ip_drain ( void )

Definition at line 866 of file ip_input.c.

References ipreass_drain().

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◆ ip_forward()

void ip_forward	(	struct mbuf *	m,
		int	srcrt
	)

Definition at line 959 of file ip_input.c.

References fib4_lookup(), in_ifaddr::ia_subnet, in_ifaddr::ia_subnetmask, icmp_error(), ICMP_REDIRECT, ICMP_REDIRECT_HOST, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, ICMP_UNREACH, ICMP_UNREACH_HOST, ICMP_UNREACH_NEEDFRAG, ifatoia, in_canforward(), ip::ip_dst, IP_FORWARDING, ip::ip_len, ip_next_mtu(), ip_output(), ip::ip_ttl, IPSTAT_INC, IPTTLDEC, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_len, and V_ipsendredirects.

Referenced by ip_dooptions(), and ip_input().

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◆ ip_init()

static void ip_init ( const void *unused __unused )

static

Definition at line 344 of file ip_input.c.

References inetdomain, inetsw, ip_nh, and ip_protox.

◆ ip_input()

void ip_input ( struct mbuf * m )

Definition at line 448 of file ip_input.c.

References in_ifaddr::ia_ifa, IA_SIN, ifatoia, in_cksum_hdr(), in_localip_fib(), INADDR_ANY, INADDR_BROADCAST, INADDR_HASH, inetsw, ip_dooptions(), ip::ip_dst, ip_forward(), ip::ip_hl, ip_len, ip::ip_len, IP_MF, ip_mforward, ip::ip_off, IP_OFFMASK, ip::ip_p, IP_PROBE, ip_protox, ip_reass(), ip_tryforward(), ip::ip_v, IPSTAT_INC, IPVERSION, in_addr::s_addr, satosin, V_in_ifaddrhead, V_inet_pfil_head, V_ip_mrouter, V_ip_sav, V_ip_strong_es, V_ipforwarding, and V_rsvp_on.

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◆ ip_rsvp_done()

int ip_rsvp_done ( void )

Definition at line 1390 of file ip_input.c.

References V_ip_rsvp_on, V_ip_rsvpd, and V_rsvp_on.

◆ ip_rsvp_init()

int ip_rsvp_init ( struct socket * so )

Definition at line 1366 of file ip_input.c.

References V_ip_rsvp_on, V_ip_rsvpd, and V_rsvp_on.

◆ ip_savecontrol()

void ip_savecontrol	(	struct inpcb *	inp,
		struct mbuf **	mp,
		struct ip *	ip,
		struct mbuf *	m
	)

Definition at line 1150 of file ip_input.c.

References CHECK_SO_CT, inpcb::inp_flags, inpcb::inp_flags2, INP_RECVDSTADDR, INP_RECVFLOWID, INP_RECVIF, INP_RECVOPTS, INP_RECVRETOPTS, INP_RECVRSSBUCKETID, INP_RECVTOS, INP_RECVTTL, inpcb::inp_socket, ip::ip_dst, ip_srcroute(), ip::ip_tos, ip::ip_ttl, and IPPROTO_IP.

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◆ ip_slowtimo()

void ip_slowtimo ( void )

Definition at line 852 of file ip_input.c.

References ipreass_slowtimo().

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◆ ip_vnet_init()

static void ip_vnet_init ( void *arg __unused )

static

Definition at line 304 of file ip_input.c.

References INADDR_NHASH, ip_nh, ipreass_init(), PFIL_INET_NAME, V_in_ifaddrhashtbl, V_in_ifaddrhead, V_in_ifaddrhmask, and V_inet_pfil_head.

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◆ ipproto_register()

int ipproto_register ( short ipproto )

Definition at line 884 of file ip_input.c.

References inetdomain, inetsw, and ip_protox.

Referenced by carp_mod_load(), and sctp_module_load().

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◆ ipproto_unregister()

int ipproto_unregister ( short ipproto )

Definition at line 915 of file ip_input.c.

References inetsw, and ip_protox.

Referenced by carp_mod_cleanup(), and sctp_module_unload().

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◆ ipreass_drain()

void ipreass_drain ( void )

Definition at line 614 of file ip_reass.c.

References count, ipq_drop(), IPQ_LOCK, IPQ_UNLOCK, IPREASS_NHASH, and V_ipq.

Referenced by ip_drain(), and sysctl_maxfragpackets().

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◆ ipreass_init()

void ipreass_init ( void )

Definition at line 563 of file ip_reass.c.

References IP_MAXFRAGPACKETS, IP_MAXFRAGS, IPREASS_NHASH, ipreass_zone_change(), maxfrags, V_ipq, V_ipq_hashseed, V_ipq_zone, V_ipreass_maxbucketsize, and V_maxfragsperpacket.

Referenced by ip_vnet_init().

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◆ ipreass_slowtimo()

void ipreass_slowtimo ( void )

Definition at line 592 of file ip_reass.c.

References IPQ_LOCK, ipq_timeout(), ipq::ipq_ttl, IPQ_UNLOCK, IPREASS_NHASH, nfrags, and V_ipq.

Referenced by ip_slowtimo().

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◆ kmod_ipstat_dec()

void kmod_ipstat_dec ( int statnum )

Definition at line 211 of file ip_input.c.

◆ kmod_ipstat_inc()

void kmod_ipstat_inc ( int statnum )

Definition at line 204 of file ip_input.c.

◆ rsvp_input()

int rsvp_input	(	struct mbuf **	mp,
		int *	offp,
		int	proto
	)

Definition at line 1406 of file ip_input.c.

References rip_input(), rsvp_input_p, V_ip_rsvpd, and V_rsvp_on.

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◆ SYSCTL_BOOL() [1/2]

SYSCTL_BOOL	(	_net_inet_ip	,
		OID_AUTO	,
		rfc1122_strong_es	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEip_strong_es,
		false	,
		"Packet's IP destination address must match address on arrival interface"
	)

◆ SYSCTL_BOOL() [2/2]

SYSCTL_BOOL	(	_net_inet_ip	,
		OID_AUTO	,
		source_address_validation	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEip_sav,
		true	,
		"Drop incoming packets with source address that is a local address"
	)

◆ SYSCTL_INT() [1/2]

SYSCTL_INT	(	_net_inet_ip	,
		IPCTL_FORWARDING	,
		forwarding	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEipforwarding,
		0	,
		"Enable IP forwarding between interfaces"
	)

◆ SYSCTL_INT() [2/2]

SYSCTL_INT	(	_net_inet_ip	,
		IPCTL_SENDREDIRECTS	,
		redirect	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEipsendredirects,
		0	,
		"Enable sending IP redirects"
	)

◆ sysctl_netinet_intr_queue_drops()

static int sysctl_netinet_intr_queue_drops ( SYSCTL_HANDLER_ARGS )

static

Definition at line 236 of file ip_input.c.

References ip_nh.

◆ sysctl_netinet_intr_queue_maxlen()

static int sysctl_netinet_intr_queue_maxlen ( SYSCTL_HANDLER_ARGS )

static

Definition at line 218 of file ip_input.c.

References ip_nh.

◆ SYSCTL_PROC() [1/2]

SYSCTL_PROC	(	_net_inet_ip	,
		IPCTL_INTRQDROPS	,
		intr_queue_drops	,
		CTLTYPE_INT\|CTLFLAG_RD\|	CTLFLAG_MPSAFE,
		0	,
		0	,
		sysctl_netinet_intr_queue_drops	,
		"I"	,
		"Number of packets dropped from the IP input queue"
	)

◆ SYSCTL_PROC() [2/2]

SYSCTL_PROC	(	_net_inet_ip	,
		IPCTL_INTRQMAXLEN	,
		intr_queue_maxlen	,
		CTLTYPE_INT\|CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		0	,
		sysctl_netinet_intr_queue_maxlen	,
		"I"	,
		"Maximum size of the IP input queue"
	)

◆ SYSCTL_VNET_PCPUSTAT()

SYSCTL_VNET_PCPUSTAT	(	_net_inet_ip	,
		IPCTL_STATS	,
		stats	,
		struct ipstat	,
		ipstat	,
		"IP statistics (struct ipstat, netinet/ip_var.h)"
	)

◆ SYSINIT()

SYSINIT	(	ip_init	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_THIRD	,
		ip_init	,
		NULL
	)

◆ VNET_DEFINE() [1/8]

VNET_DEFINE	(	int	,
		ipforwarding
	)

◆ VNET_DEFINE() [2/8]

VNET_DEFINE	(	int	,
		ipsendredirects
	)

◆ VNET_DEFINE() [3/8]

VNET_DEFINE	(	int	,
		rsvp_on
	)

◆ VNET_DEFINE() [4/8]

VNET_DEFINE	(	pfil_head_t	,
		inet_pfil_head
	)

◆ VNET_DEFINE() [5/8]

VNET_DEFINE	(	struct in_ifaddrhashhead *	,
		in_ifaddrhashtbl
	)

◆ VNET_DEFINE() [6/8]

VNET_DEFINE	(	struct in_ifaddrhead	,
		in_ifaddrhead
	)

◆ VNET_DEFINE() [7/8]

VNET_DEFINE	(	struct socket *	,
		ip_rsvpd
	)

◆ VNET_DEFINE() [8/8]

VNET_DEFINE	(	u_long	,
		in_ifaddrhmask
	)

◆ VNET_DEFINE_STATIC() [1/3]

VNET_DEFINE_STATIC	(	bool	,
		ip_sav
	)

◆ VNET_DEFINE_STATIC() [2/3]

VNET_DEFINE_STATIC	(	bool	,
		ip_strong_es
	)

◆ VNET_DEFINE_STATIC() [3/3]

VNET_DEFINE_STATIC	(	int	,
		ip_rsvp_on
	)

◆ VNET_PCPUSTAT_DEFINE()

VNET_PCPUSTAT_DEFINE	(	struct ipstat	,
		ipstat
	)

◆ VNET_PCPUSTAT_SYSINIT()

VNET_PCPUSTAT_SYSINIT ( ipstat )

◆ VNET_SYSINIT()

VNET_SYSINIT	(	ip_vnet_init	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_FOURTH	,
		ip_vnet_init	,
		NULL
	)

Variable Documentation

◆ inetctlerrmap

u_char inetctlerrmap[PRC_NCMDS]

Initial value:

= {
        0,              0,              0,              0,
        0,              EMSGSIZE,       EHOSTDOWN,      EHOSTUNREACH,
        EHOSTUNREACH,   EHOSTUNREACH,   ECONNREFUSED,   ECONNREFUSED,
        EMSGSIZE,       EHOSTUNREACH,   0,              0,
        0,              0,              EHOSTUNREACH,   0,
        ENOPROTOOPT,    ECONNREFUSED
}

Definition at line 935 of file ip_input.c.

◆ inetdomain

struct domain inetdomain

extern

Referenced by ip_init(), and ipproto_register().

◆ inetsw

struct protosw inetsw[]

extern

Referenced by ip_init(), ip_input(), ipproto_register(), and ipproto_unregister().

◆ ip_nh

struct netisr_handler ip_nh

static

Initial value:

= {
        .nh_name = "ip",
        .nh_handler = ip_input,
        .nh_proto = NETISR_IP,
 
        .nh_policy = NETISR_POLICY_FLOW,
 
}

Definition at line 134 of file ip_input.c.

Referenced by ip_init(), ip_vnet_init(), sysctl_netinet_intr_queue_drops(), and sysctl_netinet_intr_queue_maxlen().

◆ ip_protox

u_char ip_protox[IPPROTO_MAX]

Definition at line 167 of file ip_input.c.

Referenced by ip_init(), ip_input(), ipproto_register(), and ipproto_unregister().

Macros

Functions

Variables

Macro Definition Documentation

◆ CHECK_SO_CT

◆ V_ip_rsvp_on

◆ V_ip_sav

◆ V_ip_strong_es

Function Documentation

◆ __FBSDID()

◆ CTASSERT()

◆ ip_drain()

◆ ip_forward()

◆ ip_init()

◆ ip_input()

◆ ip_rsvp_done()

◆ ip_rsvp_init()

◆ ip_savecontrol()

◆ ip_slowtimo()

◆ ip_vnet_init()

◆ ipproto_register()

◆ ipproto_unregister()

◆ ipreass_drain()

◆ ipreass_init()

◆ ipreass_slowtimo()

◆ kmod_ipstat_dec()

◆ kmod_ipstat_inc()

◆ rsvp_input()

◆ SYSCTL_BOOL() [1/2]

◆ SYSCTL_BOOL() [2/2]

◆ SYSCTL_INT() [1/2]

◆ SYSCTL_INT() [2/2]

◆ sysctl_netinet_intr_queue_drops()

◆ sysctl_netinet_intr_queue_maxlen()

◆ SYSCTL_PROC() [1/2]

◆ SYSCTL_PROC() [2/2]

◆ SYSCTL_VNET_PCPUSTAT()

◆ SYSINIT()

◆ VNET_DEFINE() [1/8]

◆ VNET_DEFINE() [2/8]

◆ VNET_DEFINE() [3/8]

◆ VNET_DEFINE() [4/8]

◆ VNET_DEFINE() [5/8]

◆ VNET_DEFINE() [6/8]

◆ VNET_DEFINE() [7/8]

◆ VNET_DEFINE() [8/8]

◆ VNET_DEFINE_STATIC() [1/3]

◆ VNET_DEFINE_STATIC() [2/3]

◆ VNET_DEFINE_STATIC() [3/3]

◆ VNET_PCPUSTAT_DEFINE()

◆ VNET_PCPUSTAT_SYSINIT()

◆ VNET_SYSINIT()

Variable Documentation

◆ inetctlerrmap

◆ inetdomain

◆ inetsw

◆ ip_nh

◆ ip_protox