version 1.284.4.4, 2011/05/31 03:05:07 |
version 1.309, 2014/02/25 18:30:12 |
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" |
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#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 139 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 138 __KERNEL_RCSID(0, "$NetBSD$"); |
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#ifdef MROUTING |
#ifdef MROUTING |
#include <netinet/ip_mroute.h> |
#include <netinet/ip_mroute.h> |
#endif |
#endif |
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#include <netinet/portalgo.h> |
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#ifdef IPSEC |
#ifdef IPSEC |
#include <netinet6/ipsec.h> |
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#include <netinet6/ipsec_private.h> |
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#include <netkey/key.h> |
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#endif |
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#ifdef FAST_IPSEC |
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#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 |
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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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|
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struct pool inmulti_pool; |
struct pool inmulti_pool; |
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|
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ipflow_init(ip_hashsize); |
ipflow_init(ip_hashsize); |
#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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#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
MOWNER_ATTACH(&ip_tx_mowner); |
MOWNER_ATTACH(&ip_tx_mowner); |
Line 409 ip_input(struct mbuf *m) |
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Line 395 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 |
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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); |
Line 456 ip_input(struct mbuf *m) |
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Line 436 ip_input(struct mbuf *m) |
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goto bad; |
goto bad; |
} |
} |
if (hlen > m->m_len) { |
if (hlen > m->m_len) { |
if ((m = m_pullup(m, hlen)) == 0) { |
if ((m = m_pullup(m, hlen)) == NULL) { |
IP_STATINC(IP_STAT_BADHLEN); |
IP_STATINC(IP_STAT_BADHLEN); |
return; |
return; |
} |
} |
Line 536 ip_input(struct mbuf *m) |
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Line 516 ip_input(struct mbuf *m) |
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m_adj(m, len - m->m_pkthdr.len); |
m_adj(m, len - m->m_pkthdr.len); |
} |
} |
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#if defined(IPSEC) |
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/* ipflow (IP fast forwarding) is not compatible with IPsec. */ |
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m->m_flags &= ~M_CANFASTFWD; |
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#else |
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/* |
/* |
* Assume that we can create a fast-forward IP flow entry |
* Assume that we can create a fast-forward IP flow entry |
* based on this packet. |
* based on this packet. |
*/ |
*/ |
m->m_flags |= M_CANFASTFWD; |
m->m_flags |= M_CANFASTFWD; |
#endif |
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#ifdef PFIL_HOOKS |
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/* |
/* |
* 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 559 ip_input(struct mbuf *m) |
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Line 533 ip_input(struct mbuf *m) |
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* let ipfilter look at packet on the wire, |
* let ipfilter look at packet on the wire, |
* not the decapsulated packet. |
* not the decapsulated packet. |
*/ |
*/ |
#ifdef IPSEC |
#if defined(IPSEC) |
if (!ipsec_getnhist(m)) |
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#elif defined(FAST_IPSEC) |
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if (!ipsec_indone(m)) |
if (!ipsec_indone(m)) |
#else |
#else |
if (1) |
if (1) |
Line 570 ip_input(struct mbuf *m) |
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Line 542 ip_input(struct mbuf *m) |
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struct in_addr odst; |
struct in_addr odst; |
|
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odst = ip->ip_dst; |
odst = ip->ip_dst; |
if (pfil_run_hooks(&inet_pfil_hook, &m, m->m_pkthdr.rcvif, |
if (pfil_run_hooks(inet_pfil_hook, &m, m->m_pkthdr.rcvif, |
PFIL_IN) != 0) |
PFIL_IN) != 0) |
return; |
return; |
if (m == NULL) |
if (m == NULL) |
Line 593 ip_input(struct mbuf *m) |
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Line 565 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 744 ip_input(struct mbuf *m) |
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Line 715 ip_input(struct mbuf *m) |
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return; |
return; |
} |
} |
#ifdef IPSEC |
#ifdef IPSEC |
if (ipsec4_in_reject(m, NULL)) { |
/* Perform IPsec, if any. */ |
IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); |
if (ipsec4_input(m, IP_FORWARDING | (ip_directedbcast ? |
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IP_ALLOWBROADCAST : 0)) != 0) { |
goto bad; |
goto bad; |
} |
} |
#endif |
#endif |
#ifdef FAST_IPSEC |
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mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
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s = splsoftnet(); |
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if (mtag != NULL) { |
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tdbi = (struct tdb_ident *)(mtag + 1); |
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sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
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} else { |
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sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
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IP_FORWARDING, &error); |
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} |
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if (sp == NULL) { /* NB: can happen if error */ |
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splx(s); |
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/*XXX error stat???*/ |
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DPRINTF(("ip_input: no SP for forwarding\n")); /*XXX*/ |
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goto bad; |
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} |
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/* |
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* Check security policy against packet attributes. |
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*/ |
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error = ipsec_in_reject(sp, m); |
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KEY_FREESP(&sp); |
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splx(s); |
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if (error) { |
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IP_STATINC(IP_STAT_CANTFORWARD); |
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goto bad; |
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} |
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/* |
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* Peek at the outbound SP for this packet to determine if |
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* it's a Fast Forward candidate. |
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*/ |
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mtag = m_tag_find(m, PACKET_TAG_IPSEC_PENDING_TDB, NULL); |
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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); |
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if (sp != NULL) { |
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m->m_flags &= ~M_CANFASTFWD; |
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KEY_FREESP(&sp); |
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} |
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splx(s); |
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} |
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#endif /* FAST_IPSEC */ |
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ip_forward(m, srcrt); |
ip_forward(m, srcrt); |
} |
} |
return; |
return; |
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hlen = ip->ip_hl << 2; |
hlen = ip->ip_hl << 2; |
} |
} |
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#if defined(IPSEC) |
#ifdef IPSEC |
/* |
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* enforce IPsec policy checking if we are seeing last header. |
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* note that we do not visit this with protocols with pcb layer |
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* code - like udp/tcp/raw ip. |
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*/ |
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if ((inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0 && |
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ipsec4_in_reject(m, NULL)) { |
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IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); |
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goto bad; |
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} |
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#endif |
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#ifdef FAST_IPSEC |
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/* |
/* |
* 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 |
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* done. If so, then just pass it along. This tag gets |
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* set during AH, ESP, etc. input handling, before the |
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* packet is returned to the ip input queue for delivery. |
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*/ |
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mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
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s = splsoftnet(); |
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if (mtag != NULL) { |
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tdbi = (struct tdb_ident *)(mtag + 1); |
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sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
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} else { |
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sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
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IP_FORWARDING, &error); |
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} |
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if (sp != NULL) { |
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/* |
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* Check security policy against packet attributes. |
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*/ |
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error = ipsec_in_reject(sp, m); |
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KEY_FREESP(&sp); |
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} else { |
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/* XXX error stat??? */ |
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error = EINVAL; |
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DPRINTF(("ip_input: no SP, packet discarded\n"));/*XXX*/ |
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} |
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splx(s); |
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if (error) |
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goto bad; |
goto bad; |
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} |
} |
} |
#endif /* FAST_IPSEC */ |
#endif |
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/* |
/* |
* Switch out to protocol's input routine. |
* Switch out to protocol's input routine. |
Line 1405 ip_forward(struct mbuf *m, int srcrt) |
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Line 1290 ip_forward(struct mbuf *m, int srcrt) |
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error = ip_output(m, NULL, &ipforward_rt, |
error = ip_output(m, NULL, &ipforward_rt, |
(IP_FORWARDING | (ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
(IP_FORWARDING | (ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
(struct ip_moptions *)NULL, (struct socket *)NULL); |
NULL, NULL); |
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if (error) |
if (error) |
IP_STATINC(IP_STAT_CANTFORWARD); |
IP_STATINC(IP_STAT_CANTFORWARD); |
Line 1451 ip_forward(struct mbuf *m, int srcrt) |
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Line 1336 ip_forward(struct mbuf *m, int srcrt) |
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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; |
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#ifdef IPSEC |
#if defined(IPSEC) || defined(FAST_IPSEC) |
(void)ipsec4_forward(mcopy, &destmtu); |
{ |
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/* |
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* If the packet is routed over IPsec tunnel, tell the |
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* originator the tunnel MTU. |
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* tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz |
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* XXX quickhack!!! |
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*/ |
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struct secpolicy *sp; |
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int ipsecerror; |
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size_t ipsechdr; |
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struct route *ro; |
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sp = ipsec4_getpolicybyaddr(mcopy, |
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IPSEC_DIR_OUTBOUND, IP_FORWARDING, |
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&ipsecerror); |
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if (sp != NULL) { |
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/* count IPsec header size */ |
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ipsechdr = ipsec4_hdrsiz(mcopy, |
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IPSEC_DIR_OUTBOUND, NULL); |
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/* |
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* find the correct route for outer IPv4 |
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* header, compute tunnel MTU. |
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*/ |
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if (sp->req != NULL |
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&& sp->req->sav != NULL |
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&& sp->req->sav->sah != NULL) { |
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ro = &sp->req->sav->sah->sa_route; |
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rt = rtcache_validate(ro); |
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if (rt && rt->rt_ifp) { |
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destmtu = |
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rt->rt_rmx.rmx_mtu ? |
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rt->rt_rmx.rmx_mtu : |
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rt->rt_ifp->if_mtu; |
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destmtu -= ipsechdr; |
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} |
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} |
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#ifdef IPSEC |
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key_freesp(sp); |
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#else |
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KEY_FREESP(&sp); |
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#endif |
#endif |
} |
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} |
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#endif /*defined(IPSEC) || defined(FAST_IPSEC)*/ |
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IP_STATINC(IP_STAT_CANTFRAG); |
IP_STATINC(IP_STAT_CANTFRAG); |
break; |
break; |
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Line 1557 ip_savecontrol(struct inpcb *inp, struct |
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Line 1394 ip_savecontrol(struct inpcb *inp, struct |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
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if (inp->inp_flags & INP_RECVPKTINFO) { |
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struct in_pktinfo ipi; |
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ipi.ipi_addr = ip->ip_src; |
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ipi.ipi_ifindex = m->m_pkthdr.rcvif->if_index; |
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*mp = sbcreatecontrol((void *) &ipi, |
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sizeof(ipi), IP_RECVPKTINFO, IPPROTO_IP); |
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if (*mp) |
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mp = &(*mp)->m_next; |
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} |
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if (inp->inp_flags & INP_PKTINFO) { |
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struct in_pktinfo ipi; |
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ipi.ipi_addr = ip->ip_dst; |
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ipi.ipi_ifindex = m->m_pkthdr.rcvif->if_index; |
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*mp = sbcreatecontrol((void *) &ipi, |
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sizeof(ipi), IP_PKTINFO, IPPROTO_IP); |
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if (*mp) |
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mp = &(*mp)->m_next; |
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} |
#ifdef notyet |
#ifdef notyet |
/* |
/* |
* XXX |
* XXX |
Line 1728 sysctl_net_inet_ip_setup(struct sysctllo |
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Line 1583 sysctl_net_inet_ip_setup(struct sysctllo |
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|
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sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT, |
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "net", NULL, |
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NULL, 0, NULL, 0, |
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CTL_NET, CTL_EOL); |
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sysctl_createv(clog, 0, NULL, NULL, |
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CTLFLAG_PERMANENT, |
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CTLTYPE_NODE, "inet", |
CTLTYPE_NODE, "inet", |
SYSCTL_DESCR("PF_INET related settings"), |
SYSCTL_DESCR("PF_INET related settings"), |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
Line 1829 sysctl_net_inet_ip_setup(struct sysctllo |
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Line 1679 sysctl_net_inet_ip_setup(struct sysctllo |
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "mtudisctimeout", |
CTLTYPE_INT, "mtudisctimeout", |
SYSCTL_DESCR("Lifetime of a Path MTU Discovered route"), |
SYSCTL_DESCR("Lifetime of a Path MTU Discovered route"), |
sysctl_net_inet_ip_pmtudto, 0, &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 |
#ifdef GATEWAY |
Line 1920 sysctl_net_inet_ip_setup(struct sysctllo |
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Line 1770 sysctl_net_inet_ip_setup(struct sysctllo |
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sysctl_net_inet_ip_stats, 0, NULL, 0, |
sysctl_net_inet_ip_stats, 0, NULL, 0, |
CTL_NET, PF_INET, IPPROTO_IP, IPCTL_STATS, |
CTL_NET, PF_INET, IPPROTO_IP, IPCTL_STATS, |
CTL_EOL); |
CTL_EOL); |
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/* anonportalgo RFC6056 subtree */ |
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const struct sysctlnode *portalgo_node; |
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sysctl_createv(clog, 0, NULL, &portalgo_node, |
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CTLFLAG_PERMANENT, |
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CTLTYPE_NODE, "anonportalgo", |
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SYSCTL_DESCR("Anonymous Port Algorithm Selection (RFC 6056)"), |
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NULL, 0, NULL, 0, |
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CTL_NET, PF_INET, IPPROTO_IP, CTL_CREATE, CTL_EOL); |
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sysctl_createv(clog, 0, &portalgo_node, NULL, |
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CTLFLAG_PERMANENT, |
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CTLTYPE_STRING, "available", |
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SYSCTL_DESCR("available algorithms"), |
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sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN, |
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CTL_CREATE, CTL_EOL); |
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sysctl_createv(clog, 0, &portalgo_node, NULL, |
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
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CTLTYPE_STRING, "selected", |
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SYSCTL_DESCR("selected algorithm"), |
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sysctl_portalgo_selected4, 0, NULL, PORTALGO_MAXLEN, |
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CTL_CREATE, CTL_EOL); |
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sysctl_createv(clog, 0, &portalgo_node, NULL, |
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
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CTLTYPE_STRUCT, "reserve", |
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SYSCTL_DESCR("bitmap of reserved ports"), |
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sysctl_portalgo_reserve4, 0, NULL, 0, |
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CTL_CREATE, CTL_EOL); |
} |
} |
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void |
void |