| version 1.169, 2003/06/30 07:54:28 |
version 1.169.2.1, 2004/08/03 10:54:39 |
|
|
| * 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the University nor the names of its contributors |
| * must display the following acknowledgement: |
|
| * This product includes software developed by the University of |
|
| * California, Berkeley and its contributors. |
|
| * 4. Neither the name of the University nor the names of its contributors |
|
| * may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
* without specific prior written permission. |
| * |
* |
|
|
| #include <sys/cdefs.h> |
#include <sys/cdefs.h> |
| __KERNEL_RCSID(0, "$NetBSD$"); |
__KERNEL_RCSID(0, "$NetBSD$"); |
| |
|
| |
#include "opt_inet.h" |
| #include "opt_gateway.h" |
#include "opt_gateway.h" |
| #include "opt_pfil_hooks.h" |
#include "opt_pfil_hooks.h" |
| #include "opt_ipsec.h" |
#include "opt_ipsec.h" |
| Line 151 __KERNEL_RCSID(0, "$NetBSD$"); |
|
| Line 148 __KERNEL_RCSID(0, "$NetBSD$"); |
|
| #include <netinet6/ipsec.h> |
#include <netinet6/ipsec.h> |
| #include <netkey/key.h> |
#include <netkey/key.h> |
| #endif |
#endif |
| |
#ifdef FAST_IPSEC |
| |
#include <netipsec/ipsec.h> |
| |
#include <netipsec/key.h> |
| |
#endif /* FAST_IPSEC*/ |
| |
|
| #ifndef IPFORWARDING |
#ifndef IPFORWARDING |
| #ifdef GATEWAY |
#ifdef GATEWAY |
| Line 197 int ip_mtudisc_timeout = IPMTUDISCTIMEOU |
|
| Line 198 int ip_mtudisc_timeout = IPMTUDISCTIMEOU |
|
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| int ipprintfs = 0; |
int ipprintfs = 0; |
| #endif |
#endif |
| |
|
| |
int ip_do_randomid = 0; |
| |
|
| /* |
/* |
| * XXX - Setting ip_checkinterface mostly implements the receive side of |
* XXX - Setting ip_checkinterface mostly implements the receive side of |
| * the Strong ES model described in RFC 1122, but since the routing table |
* the Strong ES model described in RFC 1122, but since the routing table |
| Line 215 int ip_checkinterface = 0; |
|
| Line 219 int ip_checkinterface = 0; |
|
| |
|
| struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
| |
|
| extern struct domain inetdomain; |
|
| int ipqmaxlen = IFQ_MAXLEN; |
int ipqmaxlen = IFQ_MAXLEN; |
| u_long in_ifaddrhash; /* size of hash table - 1 */ |
u_long in_ifaddrhash; /* size of hash table - 1 */ |
| int in_ifaddrentries; /* total number of addrs */ |
int in_ifaddrentries; /* total number of addrs */ |
| struct in_ifaddrhead in_ifaddr; |
struct in_ifaddrhead in_ifaddrhead; |
| struct in_ifaddrhashhead *in_ifaddrhashtbl; |
struct in_ifaddrhashhead *in_ifaddrhashtbl; |
| u_long in_multihash; /* size of hash table - 1 */ |
u_long in_multihash; /* size of hash table - 1 */ |
| int in_multientries; /* total number of addrs */ |
int in_multientries; /* total number of addrs */ |
| struct in_multihead in_multi; |
|
| struct in_multihashhead *in_multihashtbl; |
struct in_multihashhead *in_multihashtbl; |
| struct ifqueue ipintrq; |
struct ifqueue ipintrq; |
| struct ipstat ipstat; |
struct ipstat ipstat; |
| u_int16_t ip_id; |
uint16_t ip_id; |
| |
|
| #ifdef PFIL_HOOKS |
#ifdef PFIL_HOOKS |
| struct pfil_head inet_pfil_hook; |
struct pfil_head inet_pfil_hook; |
| #endif |
#endif |
| |
|
| struct ipqhead ipq; |
/* |
| |
* Cached copy of nmbclusters. If nbclusters is different, |
| |
* recalculate IP parameters derived from nmbclusters. |
| |
*/ |
| |
static int ip_nmbclusters; /* copy of nmbclusters */ |
| |
static void ip_nmbclusters_changed __P((void)); /* recalc limits */ |
| |
|
| |
#define CHECK_NMBCLUSTER_PARAMS() \ |
| |
do { \ |
| |
if (__predict_false(ip_nmbclusters != nmbclusters)) \ |
| |
ip_nmbclusters_changed(); \ |
| |
} while (/*CONSTCOND*/0) |
| |
|
| |
/* IP datagram reassembly queues (hashed) */ |
| |
#define IPREASS_NHASH_LOG2 6 |
| |
#define IPREASS_NHASH (1 << IPREASS_NHASH_LOG2) |
| |
#define IPREASS_HMASK (IPREASS_NHASH - 1) |
| |
#define IPREASS_HASH(x,y) \ |
| |
(((((x) & 0xF) | ((((x) >> 8) & 0xF) << 4)) ^ (y)) & IPREASS_HMASK) |
| |
struct ipqhead ipq[IPREASS_NHASH]; |
| int ipq_locked; |
int ipq_locked; |
| int ip_nfragpackets = 0; |
static int ip_nfragpackets; /* packets in reass queue */ |
| int ip_maxfragpackets = 200; |
static int ip_nfrags; /* total fragments in reass queues */ |
| |
|
| |
int ip_maxfragpackets = 200; /* limit on packets. XXX sysctl */ |
| |
int ip_maxfrags; /* limit on fragments. XXX sysctl */ |
| |
|
| |
|
| |
/* |
| |
* Additive-Increase/Multiplicative-Decrease (AIMD) strategy for |
| |
* IP reassembly queue buffer managment. |
| |
* |
| |
* We keep a count of total IP fragments (NB: not fragmented packets!) |
| |
* awaiting reassembly (ip_nfrags) and a limit (ip_maxfrags) on fragments. |
| |
* If ip_nfrags exceeds ip_maxfrags the limit, we drop half the |
| |
* total fragments in reassembly queues.This AIMD policy avoids |
| |
* repeatedly deleting single packets under heavy fragmentation load |
| |
* (e.g., from lossy NFS peers). |
| |
*/ |
| |
static u_int ip_reass_ttl_decr __P((u_int ticks)); |
| |
static void ip_reass_drophalf __P((void)); |
| |
|
| |
|
| static __inline int ipq_lock_try __P((void)); |
static __inline int ipq_lock_try __P((void)); |
| static __inline void ipq_unlock __P((void)); |
static __inline void ipq_unlock __P((void)); |
|
|
| |
|
| #define IPQ_UNLOCK() ipq_unlock() |
#define IPQ_UNLOCK() ipq_unlock() |
| |
|
| struct pool inmulti_pool; |
POOL_INIT(inmulti_pool, sizeof(struct in_multi), 0, 0, 0, "inmltpl", NULL); |
| struct pool ipqent_pool; |
POOL_INIT(ipqent_pool, sizeof(struct ipqent), 0, 0, 0, "ipqepl", NULL); |
| |
|
| #ifdef INET_CSUM_COUNTERS |
#ifdef INET_CSUM_COUNTERS |
| #include <sys/device.h> |
#include <sys/device.h> |
| Line 307 struct evcnt ip_swcsum = EVCNT_INITIALIZ |
|
| Line 347 struct evcnt ip_swcsum = EVCNT_INITIALIZ |
|
| |
|
| #define INET_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
#define INET_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
| |
|
| |
EVCNT_ATTACH_STATIC(ip_hwcsum_bad); |
| |
EVCNT_ATTACH_STATIC(ip_hwcsum_ok); |
| |
EVCNT_ATTACH_STATIC(ip_swcsum); |
| |
|
| #else |
#else |
| |
|
| #define INET_CSUM_COUNTER_INCR(ev) /* nothing */ |
#define INET_CSUM_COUNTER_INCR(ev) /* nothing */ |
| Line 336 struct mowner ip_tx_mowner = { "internet |
|
| Line 380 struct mowner ip_tx_mowner = { "internet |
|
| #endif |
#endif |
| |
|
| /* |
/* |
| |
* Compute IP limits derived from the value of nmbclusters. |
| |
*/ |
| |
static void |
| |
ip_nmbclusters_changed(void) |
| |
{ |
| |
ip_maxfrags = nmbclusters / 4; |
| |
ip_nmbclusters = nmbclusters; |
| |
} |
| |
|
| |
/* |
| * IP initialization: fill in IP protocol switch table. |
* IP initialization: fill in IP protocol switch table. |
| * All protocols not implemented in kernel go to raw IP protocol handler. |
* All protocols not implemented in kernel go to raw IP protocol handler. |
| */ |
*/ |
| void |
void |
| ip_init() |
ip_init() |
| { |
{ |
| struct protosw *pr; |
const struct protosw *pr; |
| int i; |
int i; |
| |
|
| pool_init(&inmulti_pool, sizeof(struct in_multi), 0, 0, 0, "inmltpl", |
|
| NULL); |
|
| pool_init(&ipqent_pool, sizeof(struct ipqent), 0, 0, 0, "ipqepl", |
|
| NULL); |
|
| |
|
| pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
| if (pr == 0) |
if (pr == 0) |
| panic("ip_init"); |
panic("ip_init"); |
|
|
| if (pr->pr_domain->dom_family == PF_INET && |
if (pr->pr_domain->dom_family == PF_INET && |
| pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) |
pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) |
| ip_protox[pr->pr_protocol] = pr - inetsw; |
ip_protox[pr->pr_protocol] = pr - inetsw; |
| LIST_INIT(&ipq); |
|
| ip_id = time.tv_sec & 0xffff; |
for (i = 0; i < IPREASS_NHASH; i++) |
| |
LIST_INIT(&ipq[i]); |
| |
|
| |
ip_id = time.tv_sec & 0xfffff; |
| |
|
| ipintrq.ifq_maxlen = ipqmaxlen; |
ipintrq.ifq_maxlen = ipqmaxlen; |
| TAILQ_INIT(&in_ifaddr); |
ip_nmbclusters_changed(); |
| |
|
| |
TAILQ_INIT(&in_ifaddrhead); |
| in_ifaddrhashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IFADDR, |
in_ifaddrhashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IFADDR, |
| M_WAITOK, &in_ifaddrhash); |
M_WAITOK, &in_ifaddrhash); |
| in_multihashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IPMADDR, |
in_multihashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IPMADDR, |
|
|
| "error %d\n", i); |
"error %d\n", i); |
| #endif /* PFIL_HOOKS */ |
#endif /* PFIL_HOOKS */ |
| |
|
| #ifdef INET_CSUM_COUNTERS |
|
| evcnt_attach_static(&ip_hwcsum_bad); |
|
| evcnt_attach_static(&ip_hwcsum_ok); |
|
| evcnt_attach_static(&ip_swcsum); |
|
| #endif /* INET_CSUM_COUNTERS */ |
|
| |
|
| #ifdef MBUFTRACE |
#ifdef MBUFTRACE |
| MOWNER_ATTACH(&ip_tx_mowner); |
MOWNER_ATTACH(&ip_tx_mowner); |
| MOWNER_ATTACH(&ip_rx_mowner); |
MOWNER_ATTACH(&ip_rx_mowner); |
| Line 434 ip_input(struct mbuf *m) |
|
| Line 483 ip_input(struct mbuf *m) |
|
| int downmatch; |
int downmatch; |
| int checkif; |
int checkif; |
| int srcrt = 0; |
int srcrt = 0; |
| |
u_int hash; |
| |
#ifdef FAST_IPSEC |
| |
struct m_tag *mtag; |
| |
struct tdb_ident *tdbi; |
| |
struct secpolicy *sp; |
| |
int s, error; |
| |
#endif /* FAST_IPSEC */ |
| |
|
| MCLAIM(m, &ip_rx_mowner); |
MCLAIM(m, &ip_rx_mowner); |
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if ((m->m_flags & M_PKTHDR) == 0) |
if ((m->m_flags & M_PKTHDR) == 0) |
| panic("ipintr no HDR"); |
panic("ipintr no HDR"); |
| #endif |
#endif |
| #ifdef IPSEC |
|
| /* |
|
| * should the inner packet be considered authentic? |
|
| * see comment in ah4_input(). |
|
| */ |
|
| if (m) { |
|
| m->m_flags &= ~M_AUTHIPHDR; |
|
| m->m_flags &= ~M_AUTHIPDGM; |
|
| } |
|
| #endif |
|
| |
|
| /* |
/* |
| * If no IP addresses have been set yet but the interfaces |
* If no IP addresses have been set yet but the interfaces |
| * are receiving, can't do anything with incoming packets yet. |
* are receiving, can't do anything with incoming packets yet. |
| */ |
*/ |
| if (TAILQ_FIRST(&in_ifaddr) == 0) |
if (TAILQ_FIRST(&in_ifaddrhead) == 0) |
| goto bad; |
goto bad; |
| ipstat.ips_total++; |
ipstat.ips_total++; |
| /* |
/* |
| Line 562 ip_input(struct mbuf *m) |
|
| Line 608 ip_input(struct mbuf *m) |
|
| m_adj(m, len - m->m_pkthdr.len); |
m_adj(m, len - m->m_pkthdr.len); |
| } |
} |
| |
|
| #ifdef IPSEC |
#if defined(IPSEC) |
| /* ipflow (IP fast forwarding) is not compatible with IPsec. */ |
/* ipflow (IP fast forwarding) is not compatible with IPsec. */ |
| m->m_flags &= ~M_CANFASTFWD; |
m->m_flags &= ~M_CANFASTFWD; |
| #else |
#else |
| Line 587 ip_input(struct mbuf *m) |
|
| Line 633 ip_input(struct mbuf *m) |
|
| */ |
*/ |
| #ifdef IPSEC |
#ifdef IPSEC |
| if (!ipsec_getnhist(m)) |
if (!ipsec_getnhist(m)) |
| |
#elif defined(FAST_IPSEC) |
| |
if (!ipsec_indone(m)) |
| #else |
#else |
| if (1) |
if (1) |
| #endif |
#endif |
| Line 690 ip_input(struct mbuf *m) |
|
| Line 738 ip_input(struct mbuf *m) |
|
| #ifdef MROUTING |
#ifdef MROUTING |
| extern struct socket *ip_mrouter; |
extern struct socket *ip_mrouter; |
| |
|
| if (M_READONLY(m)) { |
|
| if ((m = m_pullup(m, hlen)) == 0) { |
|
| ipstat.ips_toosmall++; |
|
| return; |
|
| } |
|
| ip = mtod(m, struct ip *); |
|
| } |
|
| |
|
| if (ip_mrouter) { |
if (ip_mrouter) { |
| /* |
/* |
| * If we are acting as a multicast router, all |
* If we are acting as a multicast router, all |
| Line 767 ip_input(struct mbuf *m) |
|
| Line 807 ip_input(struct mbuf *m) |
|
| goto bad; |
goto bad; |
| } |
} |
| #endif |
#endif |
| |
#ifdef FAST_IPSEC |
| |
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, |
| |
IP_FORWARDING, &error); |
| |
} |
| |
if (sp == NULL) { /* NB: can happen if error */ |
| |
splx(s); |
| |
/*XXX error stat???*/ |
| |
DPRINTF(("ip_input: no SP for forwarding\n")); /*XXX*/ |
| |
goto bad; |
| |
} |
| |
|
| |
/* |
| |
* Check security policy against packet attributes. |
| |
*/ |
| |
error = ipsec_in_reject(sp, m); |
| |
KEY_FREESP(&sp); |
| |
splx(s); |
| |
if (error) { |
| |
ipstat.ips_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) |
| |
m->m_flags &= ~M_CANFASTFWD; |
| |
else { |
| |
s = splsoftnet(); |
| |
sp = ipsec4_checkpolicy(m, IPSEC_DIR_OUTBOUND, |
| |
(IP_FORWARDING | |
| |
(ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
| |
&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); |
| } |
} |
|
|
| * but it's not worth the time; just let them time out.) |
* but it's not worth the time; just let them time out.) |
| */ |
*/ |
| if (ip->ip_off & ~htons(IP_DF|IP_RF)) { |
if (ip->ip_off & ~htons(IP_DF|IP_RF)) { |
| if (M_READONLY(m)) { |
|
| if ((m = m_pullup(m, hlen)) == NULL) { |
|
| ipstat.ips_toosmall++; |
|
| goto bad; |
|
| } |
|
| ip = mtod(m, struct ip *); |
|
| } |
|
| |
|
| /* |
/* |
| * Look for queue of fragments |
* Look for queue of fragments |
| * of this datagram. |
* of this datagram. |
| */ |
*/ |
| IPQ_LOCK(); |
IPQ_LOCK(); |
| LIST_FOREACH(fp, &ipq, ipq_q) |
hash = IPREASS_HASH(ip->ip_src.s_addr, ip->ip_id); |
| |
/* XXX LIST_FOREACH(fp, &ipq[hash], ipq_q) */ |
| |
for (fp = LIST_FIRST(&ipq[hash]); fp != NULL; |
| |
fp = LIST_NEXT(fp, ipq_q)) { |
| if (ip->ip_id == fp->ipq_id && |
if (ip->ip_id == fp->ipq_id && |
| in_hosteq(ip->ip_src, fp->ipq_src) && |
in_hosteq(ip->ip_src, fp->ipq_src) && |
| in_hosteq(ip->ip_dst, fp->ipq_dst) && |
in_hosteq(ip->ip_dst, fp->ipq_dst) && |
| ip->ip_p == fp->ipq_p) |
ip->ip_p == fp->ipq_p) |
| goto found; |
goto found; |
| |
|
| |
} |
| fp = 0; |
fp = 0; |
| found: |
found: |
| |
|
|
|
| ipqe->ipqe_mff = mff; |
ipqe->ipqe_mff = mff; |
| ipqe->ipqe_m = m; |
ipqe->ipqe_m = m; |
| ipqe->ipqe_ip = ip; |
ipqe->ipqe_ip = ip; |
| m = ip_reass(ipqe, fp); |
m = ip_reass(ipqe, fp, &ipq[hash]); |
| if (m == 0) { |
if (m == 0) { |
| IPQ_UNLOCK(); |
IPQ_UNLOCK(); |
| return; |
return; |
|
|
| IPQ_UNLOCK(); |
IPQ_UNLOCK(); |
| } |
} |
| |
|
| #ifdef IPSEC |
#if defined(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 |
|
|
| goto bad; |
goto bad; |
| } |
} |
| #endif |
#endif |
| |
#if FAST_IPSEC |
| |
/* |
| |
* enforce IPsec policy checking if we are seeing last header. |
| |
* note that we do not visit this with protocols with pcb layer |
| |
* code - like udp/tcp/raw ip. |
| |
*/ |
| |
if ((inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 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, |
| |
IP_FORWARDING, &error); |
| |
} |
| |
if (sp != NULL) { |
| |
/* |
| |
* Check security policy against packet attributes. |
| |
*/ |
| |
error = ipsec_in_reject(sp, m); |
| |
KEY_FREESP(&sp); |
| |
} else { |
| |
/* XXX error stat??? */ |
| |
error = EINVAL; |
| |
DPRINTF(("ip_input: no SP, packet discarded\n"));/*XXX*/ |
| |
goto bad; |
| |
} |
| |
splx(s); |
| |
if (error) |
| |
goto bad; |
| |
} |
| |
#endif /* FAST_IPSEC */ |
| |
|
| /* |
/* |
| * Switch out to protocol's input routine. |
* Switch out to protocol's input routine. |
|
|
| * is given as fp; otherwise have to make a chain. |
* is given as fp; otherwise have to make a chain. |
| */ |
*/ |
| struct mbuf * |
struct mbuf * |
| ip_reass(ipqe, fp) |
ip_reass(ipqe, fp, ipqhead) |
| struct ipqent *ipqe; |
struct ipqent *ipqe; |
| struct ipq *fp; |
struct ipq *fp; |
| |
struct ipqhead *ipqhead; |
| { |
{ |
| struct mbuf *m = ipqe->ipqe_m; |
struct mbuf *m = ipqe->ipqe_m; |
| struct ipqent *nq, *p, *q; |
struct ipqent *nq, *p, *q; |
| Line 918 ip_reass(ipqe, fp) |
|
| Line 1044 ip_reass(ipqe, fp) |
|
| m->m_data += hlen; |
m->m_data += hlen; |
| m->m_len -= hlen; |
m->m_len -= hlen; |
| |
|
| |
#ifdef notyet |
| |
/* make sure fragment limit is up-to-date */ |
| |
CHECK_NMBCLUSTER_PARAMS(); |
| |
|
| |
/* If we have too many fragments, drop the older half. */ |
| |
if (ip_nfrags >= ip_maxfrags) |
| |
ip_reass_drophalf(void); |
| |
#endif |
| |
|
| |
/* |
| |
* We are about to add a fragment; increment frag count. |
| |
*/ |
| |
ip_nfrags++; |
| |
|
| /* |
/* |
| * If first fragment to arrive, create a reassembly queue. |
* If first fragment to arrive, create a reassembly queue. |
| */ |
*/ |
| Line 937 ip_reass(ipqe, fp) |
|
| Line 1077 ip_reass(ipqe, fp) |
|
| M_FTABLE, M_NOWAIT); |
M_FTABLE, M_NOWAIT); |
| if (fp == NULL) |
if (fp == NULL) |
| goto dropfrag; |
goto dropfrag; |
| LIST_INSERT_HEAD(&ipq, fp, ipq_q); |
LIST_INSERT_HEAD(ipqhead, fp, ipq_q); |
| |
fp->ipq_nfrags = 1; |
| fp->ipq_ttl = IPFRAGTTL; |
fp->ipq_ttl = IPFRAGTTL; |
| fp->ipq_p = ipqe->ipqe_ip->ip_p; |
fp->ipq_p = ipqe->ipqe_ip->ip_p; |
| fp->ipq_id = ipqe->ipqe_ip->ip_id; |
fp->ipq_id = ipqe->ipqe_ip->ip_id; |
| Line 946 ip_reass(ipqe, fp) |
|
| Line 1087 ip_reass(ipqe, fp) |
|
| fp->ipq_dst = ipqe->ipqe_ip->ip_dst; |
fp->ipq_dst = ipqe->ipqe_ip->ip_dst; |
| p = NULL; |
p = NULL; |
| goto insert; |
goto insert; |
| |
} else { |
| |
fp->ipq_nfrags++; |
| } |
} |
| |
|
| /* |
/* |
| Line 996 ip_reass(ipqe, fp) |
|
| Line 1139 ip_reass(ipqe, fp) |
|
| m_freem(q->ipqe_m); |
m_freem(q->ipqe_m); |
| TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q); |
TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q); |
| pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
| |
fp->ipq_nfrags--; |
| |
ip_nfrags--; |
| } |
} |
| |
|
| insert: |
insert: |
|
|
| pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
| m_cat(m, t); |
m_cat(m, t); |
| } |
} |
| |
ip_nfrags -= fp->ipq_nfrags; |
| |
|
| /* |
/* |
| * Create header for new ip packet by |
* Create header for new ip packet by |
|
|
| return (m); |
return (m); |
| |
|
| dropfrag: |
dropfrag: |
| |
if (fp != 0) |
| |
fp->ipq_nfrags--; |
| |
ip_nfrags--; |
| ipstat.ips_fragdropped++; |
ipstat.ips_fragdropped++; |
| m_freem(m); |
m_freem(m); |
| pool_put(&ipqent_pool, ipqe); |
pool_put(&ipqent_pool, ipqe); |
|
|
| struct ipq *fp; |
struct ipq *fp; |
| { |
{ |
| struct ipqent *q, *p; |
struct ipqent *q, *p; |
| |
u_int nfrags = 0; |
| |
|
| IPQ_LOCK_CHECK(); |
IPQ_LOCK_CHECK(); |
| |
|
| for (q = TAILQ_FIRST(&fp->ipq_fragq); q != NULL; q = p) { |
for (q = TAILQ_FIRST(&fp->ipq_fragq); q != NULL; q = p) { |
| p = TAILQ_NEXT(q, ipqe_q); |
p = TAILQ_NEXT(q, ipqe_q); |
| m_freem(q->ipqe_m); |
m_freem(q->ipqe_m); |
| |
nfrags++; |
| TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q); |
TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q); |
| pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
| } |
} |
| |
|
| |
if (nfrags != fp->ipq_nfrags) |
| |
printf("ip_freef: nfrags %d != %d\n", fp->ipq_nfrags, nfrags); |
| |
ip_nfrags -= nfrags; |
| LIST_REMOVE(fp, ipq_q); |
LIST_REMOVE(fp, ipq_q); |
| FREE(fp, M_FTABLE); |
FREE(fp, M_FTABLE); |
| ip_nfragpackets--; |
ip_nfragpackets--; |
| } |
} |
| |
|
| /* |
/* |
| |
* IP reassembly TTL machinery for multiplicative drop. |
| |
*/ |
| |
static u_int fragttl_histo[(IPFRAGTTL+1)]; |
| |
|
| |
|
| |
/* |
| |
* Decrement TTL of all reasembly queue entries by `ticks'. |
| |
* Count number of distinct fragments (as opposed to partial, fragmented |
| |
* datagrams) in the reassembly queue. While we traverse the entire |
| |
* reassembly queue, compute and return the median TTL over all fragments. |
| |
*/ |
| |
static u_int |
| |
ip_reass_ttl_decr(u_int ticks) |
| |
{ |
| |
u_int nfrags, median, dropfraction, keepfraction; |
| |
struct ipq *fp, *nfp; |
| |
int i; |
| |
|
| |
nfrags = 0; |
| |
memset(fragttl_histo, 0, sizeof fragttl_histo); |
| |
|
| |
for (i = 0; i < IPREASS_NHASH; i++) { |
| |
for (fp = LIST_FIRST(&ipq[i]); fp != NULL; fp = nfp) { |
| |
fp->ipq_ttl = ((fp->ipq_ttl <= ticks) ? |
| |
0 : fp->ipq_ttl - ticks); |
| |
nfp = LIST_NEXT(fp, ipq_q); |
| |
if (fp->ipq_ttl == 0) { |
| |
ipstat.ips_fragtimeout++; |
| |
ip_freef(fp); |
| |
} else { |
| |
nfrags += fp->ipq_nfrags; |
| |
fragttl_histo[fp->ipq_ttl] += fp->ipq_nfrags; |
| |
} |
| |
} |
| |
} |
| |
|
| |
KASSERT(ip_nfrags == nfrags); |
| |
|
| |
/* Find median (or other drop fraction) in histogram. */ |
| |
dropfraction = (ip_nfrags / 2); |
| |
keepfraction = ip_nfrags - dropfraction; |
| |
for (i = IPFRAGTTL, median = 0; i >= 0; i--) { |
| |
median += fragttl_histo[i]; |
| |
if (median >= keepfraction) |
| |
break; |
| |
} |
| |
|
| |
/* Return TTL of median (or other fraction). */ |
| |
return (u_int)i; |
| |
} |
| |
|
| |
void |
| |
ip_reass_drophalf(void) |
| |
{ |
| |
|
| |
u_int median_ticks; |
| |
/* |
| |
* Compute median TTL of all fragments, and count frags |
| |
* with that TTL or lower (roughly half of all fragments). |
| |
*/ |
| |
median_ticks = ip_reass_ttl_decr(0); |
| |
|
| |
/* Drop half. */ |
| |
median_ticks = ip_reass_ttl_decr(median_ticks); |
| |
|
| |
} |
| |
|
| |
/* |
| * IP timer processing; |
* IP timer processing; |
| * if a timer expires on a reassembly |
* if a timer expires on a reassembly |
| * queue, discard it. |
* queue, discard it. |
|
|
| void |
void |
| ip_slowtimo() |
ip_slowtimo() |
| { |
{ |
| struct ipq *fp, *nfp; |
static u_int dropscanidx = 0; |
| |
u_int i; |
| |
u_int median_ttl; |
| int s = splsoftnet(); |
int s = splsoftnet(); |
| |
|
| IPQ_LOCK(); |
IPQ_LOCK(); |
| for (fp = LIST_FIRST(&ipq); fp != NULL; fp = nfp) { |
|
| nfp = LIST_NEXT(fp, ipq_q); |
/* Age TTL of all fragments by 1 tick .*/ |
| if (--fp->ipq_ttl == 0) { |
median_ttl = ip_reass_ttl_decr(1); |
| ipstat.ips_fragtimeout++; |
|
| ip_freef(fp); |
/* make sure fragment limit is up-to-date */ |
| } |
CHECK_NMBCLUSTER_PARAMS(); |
| } |
|
| |
/* If we have too many fragments, drop the older half. */ |
| |
if (ip_nfrags > ip_maxfrags) |
| |
ip_reass_ttl_decr(median_ttl); |
| |
|
| /* |
/* |
| * If we are over the maximum number of fragments |
* If we are over the maximum number of fragmented packets |
| * (due to the limit being lowered), drain off |
* (due to the limit being lowered), drain off |
| * enough to get down to the new limit. |
* enough to get down to the new limit. Start draining |
| |
* from the reassembly hashqueue most recently drained. |
| */ |
*/ |
| if (ip_maxfragpackets < 0) |
if (ip_maxfragpackets < 0) |
| ; |
; |
| else { |
else { |
| while (ip_nfragpackets > ip_maxfragpackets && LIST_FIRST(&ipq)) |
int wrapped = 0; |
| ip_freef(LIST_FIRST(&ipq)); |
|
| |
i = dropscanidx; |
| |
while (ip_nfragpackets > ip_maxfragpackets && wrapped == 0) { |
| |
while (LIST_FIRST(&ipq[i]) != NULL) |
| |
ip_freef(LIST_FIRST(&ipq[i])); |
| |
if (++i >= IPREASS_NHASH) { |
| |
i = 0; |
| |
} |
| |
/* |
| |
* Dont scan forever even if fragment counters are |
| |
* wrong: stop after scanning entire reassembly queue. |
| |
*/ |
| |
if (i == dropscanidx) |
| |
wrapped = 1; |
| |
} |
| |
dropscanidx = i; |
| } |
} |
| IPQ_UNLOCK(); |
IPQ_UNLOCK(); |
| #ifdef GATEWAY |
#ifdef GATEWAY |
|
|
| if (ipq_lock_try() == 0) |
if (ipq_lock_try() == 0) |
| return; |
return; |
| |
|
| while (LIST_FIRST(&ipq) != NULL) { |
/* |
| ipstat.ips_fragdropped++; |
* Drop half the total fragments now. If more mbufs are needed, |
| ip_freef(LIST_FIRST(&ipq)); |
* we will be called again soon. |
| } |
*/ |
| |
ip_reass_drophalf(); |
| |
|
| IPQ_UNLOCK(); |
IPQ_UNLOCK(); |
| } |
} |
| Line 1250 ip_dooptions(m) |
|
| Line 1496 ip_dooptions(m) |
|
| bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr, |
bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr, |
| sizeof(ipaddr.sin_addr)); |
sizeof(ipaddr.sin_addr)); |
| if (opt == IPOPT_SSRR) |
if (opt == IPOPT_SSRR) |
| ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr))); |
ia = ifatoia(ifa_ifwithladdr(sintosa(&ipaddr))); |
| else |
else |
| ia = ip_rtaddr(ipaddr.sin_addr); |
ia = ip_rtaddr(ipaddr.sin_addr); |
| if (ia == 0) { |
if (ia == 0) { |
| Line 1571 ip_forward(m, srcrt) |
|
| Line 1817 ip_forward(m, srcrt) |
|
| struct mbuf *mcopy; |
struct mbuf *mcopy; |
| n_long dest; |
n_long dest; |
| struct ifnet *destifp; |
struct ifnet *destifp; |
| #ifdef IPSEC |
#if defined(IPSEC) || defined(FAST_IPSEC) |
| struct ifnet dummyifp; |
struct ifnet dummyifp; |
| #endif |
#endif |
| |
|
| Line 1664 ip_forward(m, srcrt) |
|
| Line 1910 ip_forward(m, srcrt) |
|
| } |
} |
| } |
} |
| |
|
| #ifdef IPSEC |
|
| /* Don't lookup socket in forwarding case */ |
|
| (void)ipsec_setsocket(m, NULL); |
|
| #endif |
|
| error = ip_output(m, (struct mbuf *)0, &ipforward_rt, |
error = ip_output(m, (struct mbuf *)0, &ipforward_rt, |
| (IP_FORWARDING | (ip_directedbcast ? IP_ALLOWBROADCAST : 0)), 0); |
(IP_FORWARDING | (ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
| |
(struct ip_moptions *)NULL, (struct socket *)NULL); |
| |
|
| if (error) |
if (error) |
| ipstat.ips_cantforward++; |
ipstat.ips_cantforward++; |
| else { |
else { |
| Line 1709 ip_forward(m, srcrt) |
|
| Line 1953 ip_forward(m, srcrt) |
|
| case EMSGSIZE: |
case EMSGSIZE: |
| type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
| code = ICMP_UNREACH_NEEDFRAG; |
code = ICMP_UNREACH_NEEDFRAG; |
| #ifndef IPSEC |
#if !defined(IPSEC) && !defined(FAST_IPSEC) |
| if (ipforward_rt.ro_rt) |
if (ipforward_rt.ro_rt) |
| destifp = ipforward_rt.ro_rt->rt_ifp; |
destifp = ipforward_rt.ro_rt->rt_ifp; |
| #else |
#else |
| Line 1726 ip_forward(m, srcrt) |
|
| Line 1970 ip_forward(m, srcrt) |
|
| struct route *ro; |
struct route *ro; |
| |
|
| sp = ipsec4_getpolicybyaddr(mcopy, |
sp = ipsec4_getpolicybyaddr(mcopy, |
| IPSEC_DIR_OUTBOUND, |
IPSEC_DIR_OUTBOUND, IP_FORWARDING, |
| IP_FORWARDING, |
&ipsecerror); |
| &ipsecerror); |
|
| |
|
| if (sp == NULL) |
if (sp == NULL) |
| destifp = ipforward_rt.ro_rt->rt_ifp; |
destifp = ipforward_rt.ro_rt->rt_ifp; |
| else { |
else { |
| /* count IPsec header size */ |
/* count IPsec header size */ |
| ipsechdr = ipsec4_hdrsiz(mcopy, |
ipsechdr = ipsec4_hdrsiz(mcopy, |
| IPSEC_DIR_OUTBOUND, |
IPSEC_DIR_OUTBOUND, NULL); |
| NULL); |
|
| |
|
| /* |
/* |
| * find the correct route for outer IPv4 |
* find the correct route for outer IPv4 |
| Line 1762 ip_forward(m, srcrt) |
|
| Line 2004 ip_forward(m, srcrt) |
|
| } |
} |
| } |
} |
| |
|
| |
#ifdef IPSEC |
| key_freesp(sp); |
key_freesp(sp); |
| |
#else |
| |
KEY_FREESP(&sp); |
| |
#endif |
| } |
} |
| } |
} |
| #endif /*IPSEC*/ |
#endif /*IPSEC*/ |
| Line 1849 ip_savecontrol(inp, mp, ip, m) |
|
| Line 2095 ip_savecontrol(inp, mp, ip, m) |
|
| } |
} |
| } |
} |
| |
|
| int |
/* |
| ip_sysctl(name, namelen, oldp, oldlenp, newp, newlen) |
* sysctl helper routine for net.inet.ip.mtudisctimeout. checks the |
| int *name; |
* range of the new value and tweaks timers if it changes. |
| u_int namelen; |
*/ |
| void *oldp; |
static int |
| size_t *oldlenp; |
sysctl_net_inet_ip_pmtudto(SYSCTLFN_ARGS) |
| void *newp; |
|
| size_t newlen; |
|
| { |
{ |
| extern int subnetsarelocal, hostzeroisbroadcast; |
int error, tmp; |
| |
struct sysctlnode node; |
| int error, old; |
|
| |
|
| /* All sysctl names at this level are terminal. */ |
node = *rnode; |
| if (namelen != 1) |
tmp = ip_mtudisc_timeout; |
| return (ENOTDIR); |
node.sysctl_data = &tmp; |
| |
error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| switch (name[0]) { |
if (error || newp == NULL) |
| case IPCTL_FORWARDING: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, &ipforwarding)); |
|
| case IPCTL_SENDREDIRECTS: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ipsendredirects)); |
|
| case IPCTL_DEFTTL: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_defttl)); |
|
| #ifdef notyet |
|
| case IPCTL_DEFMTU: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu)); |
|
| #endif |
|
| case IPCTL_FORWSRCRT: |
|
| /* Don't allow this to change in a secure environment. */ |
|
| if (securelevel > 0) |
|
| return (sysctl_rdint(oldp, oldlenp, newp, |
|
| ip_forwsrcrt)); |
|
| else |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ip_forwsrcrt)); |
|
| case IPCTL_DIRECTEDBCAST: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ip_directedbcast)); |
|
| case IPCTL_ALLOWSRCRT: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ip_allowsrcrt)); |
|
| case IPCTL_SUBNETSARELOCAL: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &subnetsarelocal)); |
|
| case IPCTL_MTUDISC: |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ip_mtudisc); |
|
| if (error == 0 && ip_mtudisc == 0) |
|
| rt_timer_queue_remove_all(ip_mtudisc_timeout_q, TRUE); |
|
| return error; |
|
| case IPCTL_ANONPORTMIN: |
|
| old = anonportmin; |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, &anonportmin); |
|
| if (anonportmin >= anonportmax || anonportmin < 0 |
|
| || anonportmin > 65535 |
|
| #ifndef IPNOPRIVPORTS |
|
| || anonportmin < IPPORT_RESERVED |
|
| #endif |
|
| ) { |
|
| anonportmin = old; |
|
| return (EINVAL); |
|
| } |
|
| return (error); |
|
| case IPCTL_ANONPORTMAX: |
|
| old = anonportmax; |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, &anonportmax); |
|
| if (anonportmin >= anonportmax || anonportmax < 0 |
|
| || anonportmax > 65535 |
|
| #ifndef IPNOPRIVPORTS |
|
| || anonportmax < IPPORT_RESERVED |
|
| #endif |
|
| ) { |
|
| anonportmax = old; |
|
| return (EINVAL); |
|
| } |
|
| return (error); |
|
| case IPCTL_MTUDISCTIMEOUT: |
|
| old = ip_mtudisc_timeout; |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ip_mtudisc_timeout); |
|
| if (ip_mtudisc_timeout < 0) { |
|
| ip_mtudisc_timeout = old; |
|
| return (EINVAL); |
|
| } |
|
| if (error == 0) |
|
| rt_timer_queue_change(ip_mtudisc_timeout_q, |
|
| ip_mtudisc_timeout); |
|
| return (error); |
return (error); |
| |
if (tmp < 0) |
| |
return (EINVAL); |
| |
|
| |
ip_mtudisc_timeout = tmp; |
| |
rt_timer_queue_change(ip_mtudisc_timeout_q, ip_mtudisc_timeout); |
| |
|
| |
return (0); |
| |
} |
| |
|
| #ifdef GATEWAY |
#ifdef GATEWAY |
| case IPCTL_MAXFLOWS: |
/* |
| { |
* sysctl helper routine for net.inet.ip.maxflows. apparently if |
| int s; |
* maxflows is even looked up, we "reap flows". |
| |
*/ |
| |
static int |
| |
sysctl_net_inet_ip_maxflows(SYSCTLFN_ARGS) |
| |
{ |
| |
int s; |
| |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, |
s = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
| &ip_maxflows); |
if (s) |
| s = splsoftnet(); |
return (s); |
| ipflow_reap(0); |
|
| splx(s); |
s = splsoftnet(); |
| return (error); |
ipflow_reap(0); |
| } |
splx(s); |
| #endif |
|
| case IPCTL_HOSTZEROBROADCAST: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &hostzeroisbroadcast)); |
|
| #if NGIF > 0 |
|
| case IPCTL_GIF_TTL: |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
| &ip_gif_ttl)); |
|
| #endif |
|
| |
|
| #if NGRE > 0 |
return (0); |
| case IPCTL_GRE_TTL: |
} |
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
#endif /* GATEWAY */ |
| &ip_gre_ttl)); |
|
| #endif |
|
| |
|
| #ifndef IPNOPRIVPORTS |
|
| case IPCTL_LOWPORTMIN: |
|
| old = lowportmin; |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, &lowportmin); |
|
| if (lowportmin >= lowportmax |
|
| || lowportmin > IPPORT_RESERVEDMAX |
|
| || lowportmin < IPPORT_RESERVEDMIN |
|
| ) { |
|
| lowportmin = old; |
|
| return (EINVAL); |
|
| } |
|
| return (error); |
|
| case IPCTL_LOWPORTMAX: |
|
| old = lowportmax; |
|
| error = sysctl_int(oldp, oldlenp, newp, newlen, &lowportmax); |
|
| if (lowportmin >= lowportmax |
|
| || lowportmax > IPPORT_RESERVEDMAX |
|
| || lowportmax < IPPORT_RESERVEDMIN |
|
| ) { |
|
| lowportmax = old; |
|
| return (EINVAL); |
|
| } |
|
| return (error); |
|
| #endif |
|
| |
|
| case IPCTL_MAXFRAGPACKETS: |
SYSCTL_SETUP(sysctl_net_inet_ip_setup, "sysctl net.inet.ip subtree setup") |
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
{ |
| &ip_maxfragpackets)); |
extern int subnetsarelocal, hostzeroisbroadcast; |
| |
|
| case IPCTL_CHECKINTERFACE: |
sysctl_createv(clog, 0, NULL, NULL, |
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
CTLFLAG_PERMANENT, |
| &ip_checkinterface)); |
CTLTYPE_NODE, "net", NULL, |
| default: |
NULL, 0, NULL, 0, |
| return (EOPNOTSUPP); |
CTL_NET, CTL_EOL); |
| } |
sysctl_createv(clog, 0, NULL, NULL, |
| /* NOTREACHED */ |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_NODE, "inet", |
| |
SYSCTL_DESCR("PF_INET related settings"), |
| |
NULL, 0, NULL, 0, |
| |
CTL_NET, PF_INET, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_NODE, "ip", |
| |
SYSCTL_DESCR("IPv4 related settings"), |
| |
NULL, 0, NULL, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, CTL_EOL); |
| |
|
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "forwarding", |
| |
SYSCTL_DESCR("Enable forwarding of INET datagrams"), |
| |
NULL, 0, &ipforwarding, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_FORWARDING, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "redirect", |
| |
SYSCTL_DESCR("Enable sending of ICMP redirect messages"), |
| |
NULL, 0, &ipsendredirects, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_SENDREDIRECTS, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "ttl", |
| |
SYSCTL_DESCR("Default TTL for an INET datagram"), |
| |
NULL, 0, &ip_defttl, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_DEFTTL, CTL_EOL); |
| |
#ifdef IPCTL_DEFMTU |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT /* |CTLFLAG_READWRITE? */, |
| |
CTLTYPE_INT, "mtu", |
| |
SYSCTL_DESCR("Default MTA for an INET route"), |
| |
NULL, 0, &ip_mtu, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_DEFMTU, CTL_EOL); |
| |
#endif /* IPCTL_DEFMTU */ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READONLY1, |
| |
CTLTYPE_INT, "forwsrcrt", |
| |
SYSCTL_DESCR("Enable forwarding of source-routed " |
| |
"datagrams"), |
| |
NULL, 0, &ip_forwsrcrt, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_FORWSRCRT, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "directed-broadcast", |
| |
SYSCTL_DESCR("Enable forwarding of broadcast datagrams"), |
| |
NULL, 0, &ip_directedbcast, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_DIRECTEDBCAST, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "allowsrcrt", |
| |
SYSCTL_DESCR("Accept source-routed datagrams"), |
| |
NULL, 0, &ip_allowsrcrt, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
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, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "mtudisc", |
| |
SYSCTL_DESCR("Use RFC1191 Path MTU Discovery"), |
| |
NULL, 0, &ip_mtudisc, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_MTUDISC, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "anonportmin", |
| |
SYSCTL_DESCR("Lowest ephemeral port number to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &anonportmin, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_ANONPORTMIN, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "anonportmax", |
| |
SYSCTL_DESCR("Highest ephemeral port number to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &anonportmax, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_ANONPORTMAX, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "mtudisctimeout", |
| |
SYSCTL_DESCR("Lifetime of a Path MTU Discovered route"), |
| |
sysctl_net_inet_ip_pmtudto, 0, &ip_mtudisc_timeout, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
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); |
| |
#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 |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "gifttl", |
| |
SYSCTL_DESCR("Default TTL for a gif tunnel datagram"), |
| |
NULL, 0, &ip_gif_ttl, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_GIF_TTL, CTL_EOL); |
| |
#endif /* NGIF */ |
| |
#ifndef IPNOPRIVPORTS |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "lowportmin", |
| |
SYSCTL_DESCR("Lowest privileged ephemeral port number " |
| |
"to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &lowportmin, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_LOWPORTMIN, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "lowportmax", |
| |
SYSCTL_DESCR("Highest privileged ephemeral port number " |
| |
"to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &lowportmax, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_LOWPORTMAX, CTL_EOL); |
| |
#endif /* IPNOPRIVPORTS */ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "maxfragpackets", |
| |
SYSCTL_DESCR("Maximum number of fragments to retain for " |
| |
"possible reassembly"), |
| |
NULL, 0, &ip_maxfragpackets, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_MAXFRAGPACKETS, CTL_EOL); |
| |
#if NGRE > 0 |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "grettl", |
| |
SYSCTL_DESCR("Default TTL for a gre tunnel datagram"), |
| |
NULL, 0, &ip_gre_ttl, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_GRE_TTL, CTL_EOL); |
| |
#endif /* NGRE */ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "checkinterface", |
| |
SYSCTL_DESCR("Enable receive side of Strong ES model " |
| |
"from RFC1122"), |
| |
NULL, 0, &ip_checkinterface, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_CHECKINTERFACE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "random_id", |
| |
SYSCTL_DESCR("Assign random ip_id values"), |
| |
NULL, 0, &ip_do_randomid, 0, |
| |
CTL_NET, PF_INET, IPPROTO_IP, |
| |
IPCTL_RANDOMID, CTL_EOL); |
| } |
} |