version 1.302.2.1, 2013/02/25 00:30:04 |
version 1.314, 2014/05/23 23:38:48 |
Line 96 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 96 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_inet.h" |
#include "opt_inet.h" |
#include "opt_compat_netbsd.h" |
#include "opt_compat_netbsd.h" |
#include "opt_gateway.h" |
#include "opt_gateway.h" |
#include "opt_pfil_hooks.h" |
|
#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
#include "opt_mrouting.h" |
#include "opt_mrouting.h" |
#include "opt_mbuftrace.h" |
#include "opt_mbuftrace.h" |
Line 141 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 140 __KERNEL_RCSID(0, "$NetBSD$"); |
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#endif |
#endif |
#include <netinet/portalgo.h> |
#include <netinet/portalgo.h> |
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#ifdef FAST_IPSEC |
#ifdef IPSEC |
#include <netipsec/ipsec.h> |
#include <netipsec/ipsec.h> |
#include <netipsec/key.h> |
#endif |
#endif /* FAST_IPSEC*/ |
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|
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#ifndef IPFORWARDING |
#ifndef IPFORWARDING |
#ifdef GATEWAY |
#ifdef GATEWAY |
Line 214 int ip_do_randomid = 0; |
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Line 212 int ip_do_randomid = 0; |
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*/ |
*/ |
int ip_checkinterface = 0; |
int ip_checkinterface = 0; |
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struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
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u_long in_ifaddrhash; /* size of hash table - 1 */ |
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int in_ifaddrentries; /* total number of addrs */ |
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struct in_ifaddrhead in_ifaddrhead; |
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struct in_ifaddrhashhead *in_ifaddrhashtbl; |
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u_long in_multihash; /* size of hash table - 1 */ |
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int in_multientries; /* total number of addrs */ |
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struct in_multihashhead *in_multihashtbl; |
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struct ifqueue ipintrq; |
struct ifqueue ipintrq; |
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ipid_state_t * ip_ids; |
ipid_state_t * ip_ids; |
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|
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percpu_t *ipstat_percpu; |
percpu_t *ipstat_percpu; |
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#ifdef PFIL_HOOKS |
pfil_head_t *inet_pfil_hook; |
struct pfil_head inet_pfil_hook; |
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#endif |
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struct pool inmulti_pool; |
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#ifdef INET_CSUM_COUNTERS |
#ifdef INET_CSUM_COUNTERS |
#include <sys/device.h> |
#include <sys/device.h> |
Line 266 EVCNT_ATTACH_STATIC(ip_swcsum); |
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Line 252 EVCNT_ATTACH_STATIC(ip_swcsum); |
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* maintenance when the remote end is on a network that is not known |
* maintenance when the remote end is on a network that is not known |
* to us. |
* to us. |
*/ |
*/ |
int ip_nhops = 0; |
|
|
static int ip_nhops = 0; |
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static struct ip_srcrt { |
static struct ip_srcrt { |
struct in_addr dst; /* final destination */ |
struct in_addr dst; /* final destination */ |
char nop; /* one NOP to align */ |
char nop; /* one NOP to align */ |
Line 283 struct mowner ip_rx_mowner = MOWNER_INIT |
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Line 271 struct mowner ip_rx_mowner = MOWNER_INIT |
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struct mowner ip_tx_mowner = MOWNER_INIT("internet", "tx"); |
struct mowner ip_tx_mowner = MOWNER_INIT("internet", "tx"); |
#endif |
#endif |
|
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static void sysctl_net_inet_ip_setup(struct sysctllog **); |
static void ip_input(struct mbuf *); |
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static void ip_forward(struct mbuf *, int); |
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static bool ip_dooptions(struct mbuf *); |
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static struct in_ifaddr *ip_rtaddr(struct in_addr); |
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static void sysctl_net_inet_ip_setup(struct sysctllog **); |
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/* |
/* |
* IP initialization: fill in IP protocol switch table. |
* IP initialization: fill in IP protocol switch table. |
|
|
ip_init(void) |
ip_init(void) |
{ |
{ |
const struct protosw *pr; |
const struct protosw *pr; |
int i; |
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|
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in_init(); |
sysctl_net_inet_ip_setup(NULL); |
sysctl_net_inet_ip_setup(NULL); |
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pool_init(&inmulti_pool, sizeof(struct in_multi), 0, 0, 0, "inmltpl", |
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NULL, IPL_SOFTNET); |
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|
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pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
if (pr == 0) |
KASSERT(pr != NULL); |
panic("ip_init"); |
|
for (i = 0; i < IPPROTO_MAX; i++) |
for (u_int i = 0; i < IPPROTO_MAX; i++) { |
ip_protox[i] = pr - inetsw; |
ip_protox[i] = pr - inetsw; |
|
} |
for (pr = inetdomain.dom_protosw; |
for (pr = inetdomain.dom_protosw; |
pr < inetdomain.dom_protoswNPROTOSW; pr++) |
pr < inetdomain.dom_protoswNPROTOSW; pr++) |
if (pr->pr_domain->dom_family == PF_INET && |
if (pr->pr_domain->dom_family == PF_INET && |
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|
|
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ipintrq.ifq_maxlen = IFQ_MAXLEN; |
ipintrq.ifq_maxlen = IFQ_MAXLEN; |
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TAILQ_INIT(&in_ifaddrhead); |
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in_ifaddrhashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, true, |
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&in_ifaddrhash); |
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in_multihashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, true, |
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&in_multihash); |
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ip_mtudisc_timeout_q = rt_timer_queue_create(ip_mtudisc_timeout); |
ip_mtudisc_timeout_q = rt_timer_queue_create(ip_mtudisc_timeout); |
#ifdef GATEWAY |
#ifdef GATEWAY |
ipflow_init(ip_hashsize); |
ipflow_init(); |
#endif |
#endif |
|
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#ifdef PFIL_HOOKS |
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/* Register our Packet Filter hook. */ |
/* Register our Packet Filter hook. */ |
inet_pfil_hook.ph_type = PFIL_TYPE_AF; |
inet_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET); |
inet_pfil_hook.ph_af = AF_INET; |
KASSERT(inet_pfil_hook != NULL); |
i = pfil_head_register(&inet_pfil_hook); |
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if (i != 0) |
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printf("ip_init: WARNING: unable to register pfil hook, " |
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"error %d\n", i); |
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#endif /* PFIL_HOOKS */ |
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|
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#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
MOWNER_ATTACH(&ip_tx_mowner); |
MOWNER_ATTACH(&ip_tx_mowner); |
Line 350 struct sockaddr_in ipaddr = { |
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Line 329 struct sockaddr_in ipaddr = { |
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.sin_len = sizeof(ipaddr), |
.sin_len = sizeof(ipaddr), |
.sin_family = AF_INET, |
.sin_family = AF_INET, |
}; |
}; |
struct route ipforward_rt; |
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static struct route ipforward_rt; |
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/* |
/* |
* IP software interrupt routine |
* IP software interrupt routine |
|
|
* Ip input routine. Checksum and byte swap header. If fragmented |
* Ip input routine. Checksum and byte swap header. If fragmented |
* try to reassemble. Process options. Pass to next level. |
* try to reassemble. Process options. Pass to next level. |
*/ |
*/ |
void |
static void |
ip_input(struct mbuf *m) |
ip_input(struct mbuf *m) |
{ |
{ |
struct ip *ip = NULL; |
struct ip *ip = NULL; |
Line 405 ip_input(struct mbuf *m) |
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Line 385 ip_input(struct mbuf *m) |
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int downmatch; |
int downmatch; |
int checkif; |
int checkif; |
int srcrt = 0; |
int srcrt = 0; |
#ifdef FAST_IPSEC |
ifnet_t *ifp; |
struct m_tag *mtag; |
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struct tdb_ident *tdbi; |
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struct secpolicy *sp; |
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int error, s; |
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#endif /* FAST_IPSEC */ |
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MCLAIM(m, &ip_rx_mowner); |
MCLAIM(m, &ip_rx_mowner); |
KASSERT((m->m_flags & M_PKTHDR) != 0); |
KASSERT((m->m_flags & M_PKTHDR) != 0); |
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ifp = m->m_pkthdr.rcvif; |
|
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/* |
/* |
* If no IP addresses have been set yet but the interfaces |
* If no IP addresses have been set yet but the interfaces |
Line 471 ip_input(struct mbuf *m) |
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Line 447 ip_input(struct mbuf *m) |
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/* 127/8 must not appear on wire - RFC1122 */ |
/* 127/8 must not appear on wire - RFC1122 */ |
if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET || |
if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET || |
(ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) { |
(ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) { |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) { |
if ((ifp->if_flags & IFF_LOOPBACK) == 0) { |
IP_STATINC(IP_STAT_BADADDR); |
IP_STATINC(IP_STAT_BADADDR); |
goto bad; |
goto bad; |
} |
} |
} |
} |
|
|
switch (m->m_pkthdr.csum_flags & |
switch (m->m_pkthdr.csum_flags & |
((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_IPv4) | |
((ifp->if_csum_flags_rx & M_CSUM_IPv4) | |
M_CSUM_IPv4_BAD)) { |
M_CSUM_IPv4_BAD)) { |
case M_CSUM_IPv4|M_CSUM_IPv4_BAD: |
case M_CSUM_IPv4|M_CSUM_IPv4_BAD: |
INET_CSUM_COUNTER_INCR(&ip_hwcsum_bad); |
INET_CSUM_COUNTER_INCR(&ip_hwcsum_bad); |
Line 494 ip_input(struct mbuf *m) |
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Line 470 ip_input(struct mbuf *m) |
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* Must compute it ourselves. Maybe skip checksum on |
* Must compute it ourselves. Maybe skip checksum on |
* loopback interfaces. |
* loopback interfaces. |
*/ |
*/ |
if (__predict_true(!(m->m_pkthdr.rcvif->if_flags & |
if (__predict_true(!(ifp->if_flags & IFF_LOOPBACK) || |
IFF_LOOPBACK) || ip_do_loopback_cksum)) { |
ip_do_loopback_cksum)) { |
INET_CSUM_COUNTER_INCR(&ip_swcsum); |
INET_CSUM_COUNTER_INCR(&ip_swcsum); |
if (in_cksum(m, hlen) != 0) |
if (in_cksum(m, hlen) != 0) |
goto badcsum; |
goto badcsum; |
Line 538 ip_input(struct mbuf *m) |
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Line 514 ip_input(struct mbuf *m) |
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*/ |
*/ |
m->m_flags |= M_CANFASTFWD; |
m->m_flags |= M_CANFASTFWD; |
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#ifdef PFIL_HOOKS |
|
/* |
/* |
* Run through list of hooks for input packets. If there are any |
* Run through list of hooks for input packets. If there are any |
* filters which require that additional packets in the flow are |
* filters which require that additional packets in the flow are |
Line 546 ip_input(struct mbuf *m) |
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Line 521 ip_input(struct mbuf *m) |
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* Note that filters must _never_ set this flag, as another filter |
* Note that filters must _never_ set this flag, as another filter |
* in the list may have previously cleared it. |
* in the list may have previously cleared it. |
*/ |
*/ |
/* |
#if defined(IPSEC) |
* let ipfilter look at packet on the wire, |
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* not the decapsulated packet. |
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*/ |
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#if defined(FAST_IPSEC) |
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if (!ipsec_indone(m)) |
if (!ipsec_indone(m)) |
#else |
#else |
if (1) |
if (1) |
#endif |
#endif |
{ |
{ |
struct in_addr odst; |
struct in_addr odst = ip->ip_dst; |
|
|
odst = ip->ip_dst; |
if (pfil_run_hooks(inet_pfil_hook, &m, ifp, PFIL_IN) != 0) |
if (pfil_run_hooks(&inet_pfil_hook, &m, m->m_pkthdr.rcvif, |
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PFIL_IN) != 0) |
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return; |
return; |
if (m == NULL) |
if (m == NULL) |
return; |
return; |
Line 582 ip_input(struct mbuf *m) |
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Line 551 ip_input(struct mbuf *m) |
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*/ |
*/ |
srcrt = (odst.s_addr != ip->ip_dst.s_addr); |
srcrt = (odst.s_addr != ip->ip_dst.s_addr); |
} |
} |
#endif /* PFIL_HOOKS */ |
|
|
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#ifdef ALTQ |
#ifdef ALTQ |
/* XXX Temporary until ALTQ is changed to use a pfil hook */ |
/* XXX Temporary until ALTQ is changed to use a pfil hook */ |
Line 619 ip_input(struct mbuf *m) |
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Line 587 ip_input(struct mbuf *m) |
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* we get finer grain control. |
* we get finer grain control. |
*/ |
*/ |
checkif = ip_checkinterface && (ipforwarding == 0) && |
checkif = ip_checkinterface && (ipforwarding == 0) && |
(m->m_pkthdr.rcvif != NULL) && |
ifp && (ifp->if_flags & IFF_LOOPBACK) == 0; |
((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0); |
|
|
|
/* |
/* |
* Check our list of addresses, to see if the packet is for us. |
* Check our list of addresses, to see if the packet is for us. |
Line 632 ip_input(struct mbuf *m) |
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Line 599 ip_input(struct mbuf *m) |
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downmatch = 0; |
downmatch = 0; |
LIST_FOREACH(ia, &IN_IFADDR_HASH(ip->ip_dst.s_addr), ia_hash) { |
LIST_FOREACH(ia, &IN_IFADDR_HASH(ip->ip_dst.s_addr), ia_hash) { |
if (in_hosteq(ia->ia_addr.sin_addr, ip->ip_dst)) { |
if (in_hosteq(ia->ia_addr.sin_addr, ip->ip_dst)) { |
if (checkif && ia->ia_ifp != m->m_pkthdr.rcvif) |
if (checkif && ia->ia_ifp != ifp) |
continue; |
continue; |
if ((ia->ia_ifp->if_flags & IFF_UP) != 0) |
if ((ia->ia_ifp->if_flags & IFF_UP) != 0) |
break; |
break; |
Line 642 ip_input(struct mbuf *m) |
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Line 609 ip_input(struct mbuf *m) |
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} |
} |
if (ia != NULL) |
if (ia != NULL) |
goto ours; |
goto ours; |
if (m->m_pkthdr.rcvif && m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) { |
if (ifp && ifp->if_flags & IFF_BROADCAST) { |
IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) { |
IFADDR_FOREACH(ifa, ifp) { |
if (ifa->ifa_addr->sa_family != AF_INET) |
if (ifa->ifa_addr->sa_family != AF_INET) |
continue; |
continue; |
ia = ifatoia(ifa); |
ia = ifatoia(ifa); |
Line 682 ip_input(struct mbuf *m) |
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Line 649 ip_input(struct mbuf *m) |
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* as expected when ip_mforward() is called from |
* as expected when ip_mforward() is called from |
* ip_output().) |
* ip_output().) |
*/ |
*/ |
if (ip_mforward(m, m->m_pkthdr.rcvif) != 0) { |
if (ip_mforward(m, ifp) != 0) { |
IP_STATINC(IP_STAT_CANTFORWARD); |
IP_STATINC(IP_STAT_CANTFORWARD); |
m_freem(m); |
m_freem(m); |
return; |
return; |
Line 702 ip_input(struct mbuf *m) |
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Line 669 ip_input(struct mbuf *m) |
|
* See if we belong to the destination multicast group on the |
* See if we belong to the destination multicast group on the |
* arrival interface. |
* arrival interface. |
*/ |
*/ |
IN_LOOKUP_MULTI(ip->ip_dst, m->m_pkthdr.rcvif, inm); |
IN_LOOKUP_MULTI(ip->ip_dst, ifp, inm); |
if (inm == NULL) { |
if (inm == NULL) { |
IP_STATINC(IP_STAT_CANTFORWARD); |
IP_STATINC(IP_STAT_CANTFORWARD); |
m_freem(m); |
m_freem(m); |
Line 732 ip_input(struct mbuf *m) |
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Line 699 ip_input(struct mbuf *m) |
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IP_STATINC(IP_STAT_CANTFORWARD); |
IP_STATINC(IP_STAT_CANTFORWARD); |
return; |
return; |
} |
} |
#ifdef FAST_IPSEC |
#ifdef IPSEC |
mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
/* Perform IPsec, if any. */ |
s = splsoftnet(); |
if (ipsec4_input(m, IP_FORWARDING | (ip_directedbcast ? |
if (mtag != NULL) { |
IP_ALLOWBROADCAST : 0)) != 0) { |
tdbi = (struct tdb_ident *)(mtag + 1); |
|
sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
|
} else { |
|
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
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IP_FORWARDING, &error); |
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} |
|
if (sp == NULL) { /* NB: can happen if error */ |
|
splx(s); |
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/*XXX error stat???*/ |
|
DPRINTF(("ip_input: no SP for forwarding\n")); /*XXX*/ |
|
goto bad; |
goto bad; |
} |
} |
|
#endif |
/* |
|
* Check security policy against packet attributes. |
|
*/ |
|
error = ipsec_in_reject(sp, m); |
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KEY_FREESP(&sp); |
|
splx(s); |
|
if (error) { |
|
IP_STATINC(IP_STAT_CANTFORWARD); |
|
goto bad; |
|
} |
|
|
|
/* |
|
* Peek at the outbound SP for this packet to determine if |
|
* it's a Fast Forward candidate. |
|
*/ |
|
mtag = m_tag_find(m, PACKET_TAG_IPSEC_PENDING_TDB, NULL); |
|
if (mtag != NULL) |
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m->m_flags &= ~M_CANFASTFWD; |
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else { |
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s = splsoftnet(); |
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sp = ipsec4_checkpolicy(m, IPSEC_DIR_OUTBOUND, |
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(IP_FORWARDING | |
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(ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
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&error, NULL); |
|
if (sp != NULL) { |
|
m->m_flags &= ~M_CANFASTFWD; |
|
KEY_FREESP(&sp); |
|
} |
|
splx(s); |
|
} |
|
#endif /* FAST_IPSEC */ |
|
|
|
ip_forward(m, srcrt); |
ip_forward(m, srcrt); |
} |
} |
return; |
return; |
|
|
hlen = ip->ip_hl << 2; |
hlen = ip->ip_hl << 2; |
} |
} |
|
|
#ifdef FAST_IPSEC |
#ifdef IPSEC |
/* |
/* |
* enforce IPsec policy checking if we are seeing last header. |
* Enforce IPsec policy checking if we are seeing last header. |
* note that we do not visit this with protocols with pcb layer |
* Note that we do not visit this with protocols with PCB layer |
* code - like udp/tcp/raw ip. |
* code - like UDP/TCP/raw IP. |
*/ |
*/ |
if ((inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0) { |
if ((inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0) { |
/* |
if (ipsec4_input(m, 0) != 0) { |
* Check if the packet has already had IPsec processing |
|
* done. If so, then just pass it along. This tag gets |
|
* set during AH, ESP, etc. input handling, before the |
|
* packet is returned to the ip input queue for delivery. |
|
*/ |
|
mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
|
s = splsoftnet(); |
|
if (mtag != NULL) { |
|
tdbi = (struct tdb_ident *)(mtag + 1); |
|
sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
|
} else { |
|
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
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IP_FORWARDING, &error); |
|
} |
|
if (sp != NULL) { |
|
/* |
|
* Check security policy against packet attributes. |
|
*/ |
|
error = ipsec_in_reject(sp, m); |
|
KEY_FREESP(&sp); |
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} else { |
|
/* XXX error stat??? */ |
|
error = EINVAL; |
|
DPRINTF(("ip_input: no SP, packet discarded\n"));/*XXX*/ |
|
} |
|
splx(s); |
|
if (error) |
|
goto bad; |
goto bad; |
|
} |
} |
} |
#endif /* FAST_IPSEC */ |
#endif |
|
|
/* |
/* |
* Switch out to protocol's input routine. |
* Switch out to protocol's input routine. |
|
|
} |
} |
|
|
/* |
/* |
* Do option processing on a datagram, |
* ip_dooptions: perform option processing on a datagram, possibly discarding |
* possibly discarding it if bad options are encountered, |
* it if bad options are encountered, or forwarding it if source-routed. |
* or forwarding it if source-routed. |
* |
* Returns 1 if packet has been forwarded/freed, |
* => Returns true if packet has been forwarded/freed. |
* 0 if the packet should be processed further. |
* => Returns false if the packet should be processed further. |
*/ |
*/ |
int |
static bool |
ip_dooptions(struct mbuf *m) |
ip_dooptions(struct mbuf *m) |
{ |
{ |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
Line 1122 ip_dooptions(struct mbuf *m) |
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Line 1021 ip_dooptions(struct mbuf *m) |
|
goto bad; |
goto bad; |
} |
} |
ip_forward(m, 1); |
ip_forward(m, 1); |
return (1); |
return true; |
} |
} |
return (0); |
return false; |
bad: |
bad: |
icmp_error(m, type, code, 0, 0); |
icmp_error(m, type, code, 0, 0); |
IP_STATINC(IP_STAT_BADOPTIONS); |
IP_STATINC(IP_STAT_BADOPTIONS); |
return (1); |
return true; |
} |
} |
|
|
/* |
/* |
* Given address of next destination (final or next hop), |
* ip_rtaddr: given address of next destination (final or next hop), |
* return internet address info of interface to be used to get there. |
* return internet address info of interface to be used to get there. |
*/ |
*/ |
struct in_ifaddr * |
static struct in_ifaddr * |
ip_rtaddr(struct in_addr dst) |
ip_rtaddr(struct in_addr dst) |
{ |
{ |
struct rtentry *rt; |
struct rtentry *rt; |
Line 1153 ip_rtaddr(struct in_addr dst) |
|
Line 1052 ip_rtaddr(struct in_addr dst) |
|
} |
} |
|
|
/* |
/* |
* Save incoming source route for use in replies, |
* save_rte: save incoming source route for use in replies, to be picked |
* to be picked up later by ip_srcroute if the receiver is interested. |
* up later by ip_srcroute if the receiver is interested. |
*/ |
*/ |
void |
static void |
save_rte(u_char *option, struct in_addr dst) |
save_rte(u_char *option, struct in_addr dst) |
{ |
{ |
unsigned olen; |
unsigned olen; |
|
|
olen = option[IPOPT_OLEN]; |
olen = option[IPOPT_OLEN]; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf("save_rte: olen %d\n", olen); |
|
#endif /* 0 */ |
|
if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst))) |
if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst))) |
return; |
return; |
memcpy((void *)ip_srcrt.srcopt, (void *)option, olen); |
memcpy((void *)ip_srcrt.srcopt, (void *)option, olen); |
Line 1196 ip_srcroute(void) |
|
Line 1091 ip_srcroute(void) |
|
/* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */ |
/* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */ |
m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) + |
m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) + |
OPTSIZ; |
OPTSIZ; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf("ip_srcroute: nhops %d mlen %d", ip_nhops, m->m_len); |
|
#endif |
|
|
|
/* |
/* |
* First save first hop for return route |
* First save first hop for return route |
*/ |
*/ |
p = &ip_srcrt.route[ip_nhops - 1]; |
p = &ip_srcrt.route[ip_nhops - 1]; |
*(mtod(m, struct in_addr *)) = *p--; |
*(mtod(m, struct in_addr *)) = *p--; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf(" hops %x", ntohl(mtod(m, struct in_addr *)->s_addr)); |
|
#endif |
|
|
|
/* |
/* |
* Copy option fields and padding (nop) to mbuf. |
* Copy option fields and padding (nop) to mbuf. |
Line 1226 ip_srcroute(void) |
|
Line 1113 ip_srcroute(void) |
|
* reversing the path (pointers are now aligned). |
* reversing the path (pointers are now aligned). |
*/ |
*/ |
while (p >= ip_srcrt.route) { |
while (p >= ip_srcrt.route) { |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf(" %x", ntohl(q->s_addr)); |
|
#endif |
|
*q++ = *p--; |
*q++ = *p--; |
} |
} |
/* |
/* |
* Last hop goes to final destination. |
* Last hop goes to final destination. |
*/ |
*/ |
*q = ip_srcrt.dst; |
*q = ip_srcrt.dst; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf(" %x\n", ntohl(q->s_addr)); |
|
#endif |
|
return (m); |
return (m); |
} |
} |
|
|
Line 1284 ip_drainstub(void) |
|
Line 1163 ip_drainstub(void) |
|
* The srcrt parameter indicates whether the packet is being forwarded |
* The srcrt parameter indicates whether the packet is being forwarded |
* via a source route. |
* via a source route. |
*/ |
*/ |
void |
static void |
ip_forward(struct mbuf *m, int srcrt) |
ip_forward(struct mbuf *m, int srcrt) |
{ |
{ |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
Line 1308 ip_forward(struct mbuf *m, int srcrt) |
|
Line 1187 ip_forward(struct mbuf *m, int srcrt) |
|
m->m_pkthdr.csum_flags = 0; |
m->m_pkthdr.csum_flags = 0; |
|
|
dest = 0; |
dest = 0; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) { |
|
printf("forward: src %s ", inet_ntoa(ip->ip_src)); |
|
printf("dst %s ttl %x\n", inet_ntoa(ip->ip_dst), ip->ip_ttl); |
|
} |
|
#endif |
|
if (m->m_flags & (M_BCAST|M_MCAST) || in_canforward(ip->ip_dst) == 0) { |
if (m->m_flags & (M_BCAST|M_MCAST) || in_canforward(ip->ip_dst) == 0) { |
IP_STATINC(IP_STAT_CANTFORWARD); |
IP_STATINC(IP_STAT_CANTFORWARD); |
m_freem(m); |
m_freem(m); |
Line 1366 ip_forward(struct mbuf *m, int srcrt) |
|
Line 1239 ip_forward(struct mbuf *m, int srcrt) |
|
*/ |
*/ |
type = ICMP_REDIRECT; |
type = ICMP_REDIRECT; |
code = ICMP_REDIRECT_HOST; |
code = ICMP_REDIRECT_HOST; |
#ifdef DIAGNOSTIC |
|
if (ipprintfs) |
|
printf("redirect (%d) to %x\n", code, |
|
(u_int32_t)dest); |
|
#endif |
|
} |
} |
} |
} |
|
|
Line 1422 ip_forward(struct mbuf *m, int srcrt) |
|
Line 1290 ip_forward(struct mbuf *m, int srcrt) |
|
|
|
if ((rt = rtcache_validate(&ipforward_rt)) != NULL) |
if ((rt = rtcache_validate(&ipforward_rt)) != NULL) |
destmtu = rt->rt_ifp->if_mtu; |
destmtu = rt->rt_ifp->if_mtu; |
|
#ifdef IPSEC |
#if defined(FAST_IPSEC) |
(void)ipsec4_forward(mcopy, &destmtu); |
{ |
#endif |
/* |
|
* If the packet is routed over IPsec tunnel, tell the |
|
* originator the tunnel MTU. |
|
* tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz |
|
* XXX quickhack!!! |
|
*/ |
|
|
|
struct secpolicy *sp; |
|
int ipsecerror; |
|
size_t ipsechdr; |
|
struct route *ro; |
|
|
|
sp = ipsec4_getpolicybyaddr(mcopy, |
|
IPSEC_DIR_OUTBOUND, IP_FORWARDING, |
|
&ipsecerror); |
|
|
|
if (sp != NULL) { |
|
/* count IPsec header size */ |
|
ipsechdr = ipsec4_hdrsiz(mcopy, |
|
IPSEC_DIR_OUTBOUND, NULL); |
|
|
|
/* |
|
* find the correct route for outer IPv4 |
|
* header, compute tunnel MTU. |
|
*/ |
|
|
|
if (sp->req != NULL |
|
&& sp->req->sav != NULL |
|
&& sp->req->sav->sah != NULL) { |
|
ro = &sp->req->sav->sah->sa_route; |
|
rt = rtcache_validate(ro); |
|
if (rt && rt->rt_ifp) { |
|
destmtu = |
|
rt->rt_rmx.rmx_mtu ? |
|
rt->rt_rmx.rmx_mtu : |
|
rt->rt_ifp->if_mtu; |
|
destmtu -= ipsechdr; |
|
} |
|
} |
|
|
|
KEY_FREESP(&sp); |
|
} |
|
} |
|
#endif /*defined(FAST_IPSEC)*/ |
|
IP_STATINC(IP_STAT_CANTFRAG); |
IP_STATINC(IP_STAT_CANTFRAG); |
break; |
break; |
|
|
case ENOBUFS: |
case ENOBUFS: |
#if 1 |
|
/* |
/* |
* a router should not generate ICMP_SOURCEQUENCH as |
* Do not generate ICMP_SOURCEQUENCH as required in RFC 1812, |
* required in RFC1812 Requirements for IP Version 4 Routers. |
* Requirements for IP Version 4 Routers. Source quench can |
* source quench could be a big problem under DoS attacks, |
* big problem under DoS attacks or if the underlying |
* or if the underlying interface is rate-limited. |
* interface is rate-limited. |
*/ |
*/ |
if (mcopy) |
if (mcopy) |
m_freem(mcopy); |
m_freem(mcopy); |
return; |
return; |
#else |
|
type = ICMP_SOURCEQUENCH; |
|
code = 0; |
|
break; |
|
#endif |
|
} |
} |
icmp_error(mcopy, type, code, dest, destmtu); |
icmp_error(mcopy, type, code, dest, destmtu); |
} |
} |
|
|
ip_savecontrol(struct inpcb *inp, struct mbuf **mp, struct ip *ip, |
ip_savecontrol(struct inpcb *inp, struct mbuf **mp, struct ip *ip, |
struct mbuf *m) |
struct mbuf *m) |
{ |
{ |
|
struct socket *so = inp->inp_socket; |
|
ifnet_t *ifp = m->m_pkthdr.rcvif; |
|
int inpflags = inp->inp_flags; |
|
|
if (inp->inp_socket->so_options & SO_TIMESTAMP |
if (so->so_options & SO_TIMESTAMP |
#ifdef SO_OTIMESTAMP |
#ifdef SO_OTIMESTAMP |
|| inp->inp_socket->so_options & SO_OTIMESTAMP |
|| so->so_options & SO_OTIMESTAMP |
#endif |
#endif |
) { |
) { |
struct timeval tv; |
struct timeval tv; |
|
|
microtime(&tv); |
microtime(&tv); |
#ifdef SO_OTIMESTAMP |
#ifdef SO_OTIMESTAMP |
if (inp->inp_socket->so_options & SO_OTIMESTAMP) { |
if (so->so_options & SO_OTIMESTAMP) { |
struct timeval50 tv50; |
struct timeval50 tv50; |
timeval_to_timeval50(&tv, &tv50); |
timeval_to_timeval50(&tv, &tv50); |
*mp = sbcreatecontrol((void *) &tv50, sizeof(tv50), |
*mp = sbcreatecontrol((void *) &tv50, sizeof(tv50), |
Line 1518 ip_savecontrol(struct inpcb *inp, struct |
|
Line 1339 ip_savecontrol(struct inpcb *inp, struct |
|
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (inp->inp_flags & INP_RECVDSTADDR) { |
if (inpflags & INP_RECVDSTADDR) { |
*mp = sbcreatecontrol((void *) &ip->ip_dst, |
*mp = sbcreatecontrol((void *) &ip->ip_dst, |
sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP); |
sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
#ifdef notyet |
if (inpflags & INP_RECVPKTINFO) { |
/* |
struct in_pktinfo ipi; |
* XXX |
ipi.ipi_addr = ip->ip_src; |
* Moving these out of udp_input() made them even more broken |
ipi.ipi_ifindex = ifp->if_index; |
* than they already were. |
*mp = sbcreatecontrol((void *) &ipi, |
* - fenner@parc.xerox.com |
sizeof(ipi), IP_RECVPKTINFO, IPPROTO_IP); |
*/ |
|
/* options were tossed already */ |
|
if (inp->inp_flags & INP_RECVOPTS) { |
|
*mp = sbcreatecontrol((void *) opts_deleted_above, |
|
sizeof(struct in_addr), IP_RECVOPTS, IPPROTO_IP); |
|
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
/* ip_srcroute doesn't do what we want here, need to fix */ |
if (inpflags & INP_PKTINFO) { |
if (inp->inp_flags & INP_RECVRETOPTS) { |
struct in_pktinfo ipi; |
*mp = sbcreatecontrol((void *) ip_srcroute(), |
ipi.ipi_addr = ip->ip_dst; |
sizeof(struct in_addr), IP_RECVRETOPTS, IPPROTO_IP); |
ipi.ipi_ifindex = ifp->if_index; |
|
*mp = sbcreatecontrol((void *) &ipi, |
|
sizeof(ipi), IP_PKTINFO, IPPROTO_IP); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
#endif |
if (inpflags & INP_RECVIF) { |
if (inp->inp_flags & INP_RECVIF) { |
|
struct sockaddr_dl sdl; |
struct sockaddr_dl sdl; |
|
|
sockaddr_dl_init(&sdl, sizeof(sdl), |
sockaddr_dl_init(&sdl, sizeof(sdl), ifp ? |
(m->m_pkthdr.rcvif != NULL) |
ifp->if_index : 0, 0, NULL, 0, NULL, 0); |
? m->m_pkthdr.rcvif->if_index |
|
: 0, |
|
0, NULL, 0, NULL, 0); |
|
*mp = sbcreatecontrol(&sdl, sdl.sdl_len, IP_RECVIF, IPPROTO_IP); |
*mp = sbcreatecontrol(&sdl, sdl.sdl_len, IP_RECVIF, IPPROTO_IP); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (inp->inp_flags & INP_RECVTTL) { |
if (inpflags & INP_RECVTTL) { |
*mp = sbcreatecontrol((void *) &ip->ip_ttl, |
*mp = sbcreatecontrol((void *) &ip->ip_ttl, |
sizeof(uint8_t), IP_RECVTTL, IPPROTO_IP); |
sizeof(uint8_t), IP_RECVTTL, IPPROTO_IP); |
if (*mp) |
if (*mp) |
Line 1621 sysctl_net_inet_ip_pmtudto(SYSCTLFN_ARGS |
|
Line 1435 sysctl_net_inet_ip_pmtudto(SYSCTLFN_ARGS |
|
return (0); |
return (0); |
} |
} |
|
|
#ifdef GATEWAY |
|
/* |
|
* sysctl helper routine for net.inet.ip.maxflows. |
|
*/ |
|
static int |
|
sysctl_net_inet_ip_maxflows(SYSCTLFN_ARGS) |
|
{ |
|
int error; |
|
|
|
error = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
|
if (error || newp == NULL) |
|
return (error); |
|
|
|
mutex_enter(softnet_lock); |
|
KERNEL_LOCK(1, NULL); |
|
|
|
ipflow_prune(); |
|
|
|
KERNEL_UNLOCK_ONE(NULL); |
|
mutex_exit(softnet_lock); |
|
|
|
return (0); |
|
} |
|
|
|
static int |
|
sysctl_net_inet_ip_hashsize(SYSCTLFN_ARGS) |
|
{ |
|
int error, tmp; |
|
struct sysctlnode node; |
|
|
|
node = *rnode; |
|
tmp = ip_hashsize; |
|
node.sysctl_data = &tmp; |
|
error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
|
if (error || newp == NULL) |
|
return (error); |
|
|
|
if ((tmp & (tmp - 1)) == 0 && tmp != 0) { |
|
/* |
|
* Can only fail due to malloc() |
|
*/ |
|
mutex_enter(softnet_lock); |
|
KERNEL_LOCK(1, NULL); |
|
|
|
error = ipflow_invalidate_all(tmp); |
|
|
|
KERNEL_UNLOCK_ONE(NULL); |
|
mutex_exit(softnet_lock); |
|
|
|
} else { |
|
/* |
|
* EINVAL if not a power of 2 |
|
*/ |
|
error = EINVAL; |
|
} |
|
|
|
return error; |
|
} |
|
#endif /* GATEWAY */ |
|
|
|
static int |
static int |
sysctl_net_inet_ip_stats(SYSCTLFN_ARGS) |
sysctl_net_inet_ip_stats(SYSCTLFN_ARGS) |
{ |
{ |
Line 1691 sysctl_net_inet_ip_stats(SYSCTLFN_ARGS) |
|
Line 1445 sysctl_net_inet_ip_stats(SYSCTLFN_ARGS) |
|
static void |
static void |
sysctl_net_inet_ip_setup(struct sysctllog **clog) |
sysctl_net_inet_ip_setup(struct sysctllog **clog) |
{ |
{ |
extern int subnetsarelocal, hostzeroisbroadcast; |
|
|
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "net", NULL, |
|
NULL, 0, NULL, 0, |
|
CTL_NET, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT, |
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "inet", |
CTLTYPE_NODE, "inet", |
Line 1763 sysctl_net_inet_ip_setup(struct sysctllo |
|
Line 1510 sysctl_net_inet_ip_setup(struct sysctllo |
|
NULL, 0, &ip_allowsrcrt, 0, |
NULL, 0, &ip_allowsrcrt, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_ALLOWSRCRT, CTL_EOL); |
IPCTL_ALLOWSRCRT, CTL_EOL); |
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "subnetsarelocal", |
|
SYSCTL_DESCR("Whether logical subnets are considered " |
|
"local"), |
|
NULL, 0, &subnetsarelocal, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_SUBNETSARELOCAL, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "mtudisc", |
CTLTYPE_INT, "mtudisc", |
Line 1799 sysctl_net_inet_ip_setup(struct sysctllo |
|
Line 1539 sysctl_net_inet_ip_setup(struct sysctllo |
|
sysctl_net_inet_ip_pmtudto, 0, (void *)&ip_mtudisc_timeout, 0, |
sysctl_net_inet_ip_pmtudto, 0, (void *)&ip_mtudisc_timeout, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_MTUDISCTIMEOUT, CTL_EOL); |
IPCTL_MTUDISCTIMEOUT, CTL_EOL); |
#ifdef GATEWAY |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "maxflows", |
|
SYSCTL_DESCR("Number of flows for fast forwarding"), |
|
sysctl_net_inet_ip_maxflows, 0, &ip_maxflows, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_MAXFLOWS, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "hashsize", |
|
SYSCTL_DESCR("Size of hash table for fast forwarding (IPv4)"), |
|
sysctl_net_inet_ip_hashsize, 0, &ip_hashsize, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
CTL_CREATE, CTL_EOL); |
|
#endif /* GATEWAY */ |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "hostzerobroadcast", |
|
SYSCTL_DESCR("All zeroes address is broadcast address"), |
|
NULL, 0, &hostzeroisbroadcast, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_HOSTZEROBROADCAST, CTL_EOL); |
|
#if NGIF > 0 |
#if NGIF > 0 |
sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |