version 1.209.2.2, 2005/03/19 08:36:38 |
version 1.236.2.1.4.1, 2008/03/30 15:26:11 |
Line 121 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 121 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/pool.h> |
#include <sys/pool.h> |
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
|
#include <sys/kauth.h> |
|
|
#include <net/if.h> |
#include <net/if.h> |
#include <net/if_dl.h> |
#include <net/if_dl.h> |
Line 131 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 132 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include <netinet/in_systm.h> |
#include <netinet/in_systm.h> |
#include <netinet/ip.h> |
#include <netinet/ip.h> |
#include <netinet/in_pcb.h> |
#include <netinet/in_pcb.h> |
|
#include <netinet/in_proto.h> |
#include <netinet/in_var.h> |
#include <netinet/in_var.h> |
#include <netinet/ip_var.h> |
#include <netinet/ip_var.h> |
#include <netinet/ip_icmp.h> |
#include <netinet/ip_icmp.h> |
Line 200 int ipprintfs = 0; |
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Line 202 int ipprintfs = 0; |
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#endif |
#endif |
|
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int ip_do_randomid = 0; |
int ip_do_randomid = 0; |
int ip_do_loopback_cksum = 0; |
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|
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/* |
/* |
* XXX - Setting ip_checkinterface mostly implements the receive side of |
* XXX - Setting ip_checkinterface mostly implements the receive side of |
Line 279 static u_int ip_reass_ttl_decr(u_int tic |
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Line 280 static u_int ip_reass_ttl_decr(u_int tic |
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static void ip_reass_drophalf(void); |
static void ip_reass_drophalf(void); |
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|
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static __inline int ipq_lock_try(void); |
static inline int ipq_lock_try(void); |
static __inline void ipq_unlock(void); |
static inline void ipq_unlock(void); |
|
|
static __inline int |
static inline int |
ipq_lock_try(void) |
ipq_lock_try(void) |
{ |
{ |
int s; |
int s; |
Line 301 ipq_lock_try(void) |
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Line 302 ipq_lock_try(void) |
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return (1); |
return (1); |
} |
} |
|
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static __inline void |
static inline void |
ipq_unlock(void) |
ipq_unlock(void) |
{ |
{ |
int s; |
int s; |
Line 376 static struct ip_srcrt { |
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Line 377 static struct ip_srcrt { |
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static void save_rte(u_char *, struct in_addr); |
static void save_rte(u_char *, struct in_addr); |
|
|
#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
struct mowner ip_rx_mowner = { "internet", "rx" }; |
struct mowner ip_rx_mowner = MOWNER_INIT("internet", "rx"); |
struct mowner ip_tx_mowner = { "internet", "tx" }; |
struct mowner ip_tx_mowner = MOWNER_INIT("internet", "tx"); |
#endif |
#endif |
|
|
/* |
/* |
|
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for (i = 0; i < IPREASS_NHASH; i++) |
for (i = 0; i < IPREASS_NHASH; i++) |
LIST_INIT(&ipq[i]); |
LIST_INIT(&ipq[i]); |
|
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ip_id = time.tv_sec & 0xfffff; |
ip_id = time_second & 0xfffff; |
|
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ipintrq.ifq_maxlen = ipqmaxlen; |
ipintrq.ifq_maxlen = ipqmaxlen; |
ip_nmbclusters_changed(); |
ip_nmbclusters_changed(); |
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#endif /* MBUFTRACE */ |
#endif /* MBUFTRACE */ |
} |
} |
|
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struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; |
struct sockaddr_in ipaddr = { |
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.sin_len = sizeof(ipaddr), |
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.sin_family = AF_INET, |
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}; |
struct route ipforward_rt; |
struct route ipforward_rt; |
|
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/* |
/* |
Line 484 ip_input(struct mbuf *m) |
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Line 488 ip_input(struct mbuf *m) |
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int downmatch; |
int downmatch; |
int checkif; |
int checkif; |
int srcrt = 0; |
int srcrt = 0; |
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int s; |
u_int hash; |
u_int hash; |
#ifdef FAST_IPSEC |
#ifdef FAST_IPSEC |
struct m_tag *mtag; |
struct m_tag *mtag; |
struct tdb_ident *tdbi; |
struct tdb_ident *tdbi; |
struct secpolicy *sp; |
struct secpolicy *sp; |
int s, error; |
int error; |
#endif /* FAST_IPSEC */ |
#endif /* FAST_IPSEC */ |
|
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MCLAIM(m, &ip_rx_mowner); |
MCLAIM(m, &ip_rx_mowner); |
Line 732 ip_input(struct mbuf *m) |
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Line 737 ip_input(struct mbuf *m) |
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} |
} |
if (ia != NULL) |
if (ia != NULL) |
goto ours; |
goto ours; |
if (m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) { |
if (m->m_pkthdr.rcvif && m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) { |
IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) { |
IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) { |
if (ifa->ifa_addr->sa_family != AF_INET) |
if (ifa->ifa_addr->sa_family != AF_INET) |
continue; |
continue; |
|
|
*/ |
*/ |
if (mff || ip->ip_off != htons(0)) { |
if (mff || ip->ip_off != htons(0)) { |
ipstat.ips_fragments++; |
ipstat.ips_fragments++; |
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s = splvm(); |
ipqe = pool_get(&ipqent_pool, PR_NOWAIT); |
ipqe = pool_get(&ipqent_pool, PR_NOWAIT); |
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splx(s); |
if (ipqe == NULL) { |
if (ipqe == NULL) { |
ipstat.ips_rcvmemdrop++; |
ipstat.ips_rcvmemdrop++; |
IPQ_UNLOCK(); |
IPQ_UNLOCK(); |
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|
goto bad; |
goto bad; |
} |
} |
#endif |
#endif |
#if FAST_IPSEC |
#ifdef FAST_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 |
|
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/* XXX error stat??? */ |
/* XXX error stat??? */ |
error = EINVAL; |
error = EINVAL; |
DPRINTF(("ip_input: no SP, packet discarded\n"));/*XXX*/ |
DPRINTF(("ip_input: no SP, packet discarded\n"));/*XXX*/ |
goto bad; |
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} |
} |
splx(s); |
splx(s); |
if (error) |
if (error) |
Line 1051 ip_reass(struct ipqent *ipqe, struct ipq |
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Line 1057 ip_reass(struct ipqent *ipqe, struct ipq |
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struct ip *ip; |
struct ip *ip; |
struct mbuf *t; |
struct mbuf *t; |
int hlen = ipqe->ipqe_ip->ip_hl << 2; |
int hlen = ipqe->ipqe_ip->ip_hl << 2; |
int i, next; |
int i, next, s; |
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IPQ_LOCK_CHECK(); |
IPQ_LOCK_CHECK(); |
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Line 1156 ip_reass(struct ipqent *ipqe, struct ipq |
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Line 1162 ip_reass(struct ipqent *ipqe, struct ipq |
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nq = TAILQ_NEXT(q, ipqe_q); |
nq = TAILQ_NEXT(q, ipqe_q); |
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); |
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s = splvm(); |
pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
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splx(s); |
fp->ipq_nfrags--; |
fp->ipq_nfrags--; |
ip_nfrags--; |
ip_nfrags--; |
} |
} |
|
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m->m_next = 0; |
m->m_next = 0; |
m_cat(m, t); |
m_cat(m, t); |
nq = TAILQ_NEXT(q, ipqe_q); |
nq = TAILQ_NEXT(q, ipqe_q); |
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s = splvm(); |
pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
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splx(s); |
for (q = nq; q != NULL; q = nq) { |
for (q = nq; q != NULL; q = nq) { |
t = q->ipqe_m; |
t = q->ipqe_m; |
nq = TAILQ_NEXT(q, ipqe_q); |
nq = TAILQ_NEXT(q, ipqe_q); |
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s = splvm(); |
pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
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splx(s); |
m_cat(m, t); |
m_cat(m, t); |
} |
} |
ip_nfrags -= fp->ipq_nfrags; |
ip_nfrags -= fp->ipq_nfrags; |
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for (t = m; t; t = t->m_next) |
for (t = m; t; t = t->m_next) |
plen += t->m_len; |
plen += t->m_len; |
m->m_pkthdr.len = plen; |
m->m_pkthdr.len = plen; |
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m->m_pkthdr.csum_flags = 0; |
} |
} |
return (m); |
return (m); |
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ip_nfrags--; |
ip_nfrags--; |
ipstat.ips_fragdropped++; |
ipstat.ips_fragdropped++; |
m_freem(m); |
m_freem(m); |
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s = splvm(); |
pool_put(&ipqent_pool, ipqe); |
pool_put(&ipqent_pool, ipqe); |
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splx(s); |
return (0); |
return (0); |
} |
} |
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Line 1248 ip_freef(struct ipq *fp) |
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Line 1263 ip_freef(struct ipq *fp) |
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{ |
{ |
struct ipqent *q, *p; |
struct ipqent *q, *p; |
u_int nfrags = 0; |
u_int nfrags = 0; |
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int s; |
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IPQ_LOCK_CHECK(); |
IPQ_LOCK_CHECK(); |
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Line 1256 ip_freef(struct ipq *fp) |
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Line 1272 ip_freef(struct ipq *fp) |
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m_freem(q->ipqe_m); |
m_freem(q->ipqe_m); |
nfrags++; |
nfrags++; |
TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q); |
TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q); |
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s = splvm(); |
pool_put(&ipqent_pool, q); |
pool_put(&ipqent_pool, q); |
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splx(s); |
} |
} |
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if (nfrags != fp->ipq_nfrags) |
if (nfrags != fp->ipq_nfrags) |
Line 1822 ip_forward(struct mbuf *m, int srcrt) |
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Line 1840 ip_forward(struct mbuf *m, int srcrt) |
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struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
struct sockaddr_in *sin; |
struct sockaddr_in *sin; |
struct rtentry *rt; |
struct rtentry *rt; |
int error, type = 0, code = 0; |
int error, type = 0, code = 0, destmtu = 0; |
struct mbuf *mcopy; |
struct mbuf *mcopy; |
n_long dest; |
n_long dest; |
struct ifnet *destifp; |
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#if defined(IPSEC) || defined(FAST_IPSEC) |
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struct ifnet dummyifp; |
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#endif |
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/* |
/* |
* We are now in the output path. |
* We are now in the output path. |
Line 1842 ip_forward(struct mbuf *m, int srcrt) |
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Line 1856 ip_forward(struct mbuf *m, int srcrt) |
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dest = 0; |
dest = 0; |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (ipprintfs) |
if (ipprintfs) { |
printf("forward: src %2.2x dst %2.2x ttl %x\n", |
printf("forward: src %s ", inet_ntoa(ip->ip_src)); |
ntohl(ip->ip_src.s_addr), |
printf("dst %s ttl %x\n", inet_ntoa(ip->ip_dst), ip->ip_ttl); |
ntohl(ip->ip_dst.s_addr), ip->ip_ttl); |
} |
#endif |
#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) { |
ipstat.ips_cantforward++; |
ipstat.ips_cantforward++; |
Line 1856 ip_forward(struct mbuf *m, int srcrt) |
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Line 1870 ip_forward(struct mbuf *m, int srcrt) |
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icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0); |
icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0); |
return; |
return; |
} |
} |
ip->ip_ttl -= IPTTLDEC; |
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sin = satosin(&ipforward_rt.ro_dst); |
sin = satosin(&ipforward_rt.ro_dst); |
if ((rt = ipforward_rt.ro_rt) == 0 || |
if ((rt = ipforward_rt.ro_rt) == 0 || |
Line 1871 ip_forward(struct mbuf *m, int srcrt) |
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Line 1884 ip_forward(struct mbuf *m, int srcrt) |
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rtalloc(&ipforward_rt); |
rtalloc(&ipforward_rt); |
if (ipforward_rt.ro_rt == 0) { |
if (ipforward_rt.ro_rt == 0) { |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, dest, 0); |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, dest, 0); |
return; |
return; |
} |
} |
rt = ipforward_rt.ro_rt; |
rt = ipforward_rt.ro_rt; |
Line 1886 ip_forward(struct mbuf *m, int srcrt) |
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Line 1899 ip_forward(struct mbuf *m, int srcrt) |
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if (mcopy) |
if (mcopy) |
mcopy = m_pullup(mcopy, ip->ip_hl << 2); |
mcopy = m_pullup(mcopy, ip->ip_hl << 2); |
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ip->ip_ttl -= IPTTLDEC; |
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/* |
/* |
* If forwarding packet using same interface that it came in on, |
* If forwarding packet using same interface that it came in on, |
* perhaps should send a redirect to sender to shortcut a hop. |
* perhaps should send a redirect to sender to shortcut a hop. |
Line 1942 ip_forward(struct mbuf *m, int srcrt) |
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Line 1957 ip_forward(struct mbuf *m, int srcrt) |
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} |
} |
if (mcopy == NULL) |
if (mcopy == NULL) |
return; |
return; |
destifp = NULL; |
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switch (error) { |
switch (error) { |
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Line 1962 ip_forward(struct mbuf *m, int srcrt) |
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Line 1976 ip_forward(struct mbuf *m, int srcrt) |
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case EMSGSIZE: |
case EMSGSIZE: |
type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
code = ICMP_UNREACH_NEEDFRAG; |
code = ICMP_UNREACH_NEEDFRAG; |
#if !defined(IPSEC) && !defined(FAST_IPSEC) |
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if (ipforward_rt.ro_rt) |
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destifp = ipforward_rt.ro_rt->rt_ifp; |
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#else |
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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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if (ipforward_rt.ro_rt) { |
if (ipforward_rt.ro_rt) { |
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#if defined(IPSEC) || defined(FAST_IPSEC) |
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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; |
struct secpolicy *sp; |
int ipsecerror; |
int ipsecerror; |
size_t ipsechdr; |
size_t ipsechdr; |
Line 1981 ip_forward(struct mbuf *m, int srcrt) |
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Line 1995 ip_forward(struct mbuf *m, int srcrt) |
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sp = ipsec4_getpolicybyaddr(mcopy, |
sp = ipsec4_getpolicybyaddr(mcopy, |
IPSEC_DIR_OUTBOUND, IP_FORWARDING, |
IPSEC_DIR_OUTBOUND, IP_FORWARDING, |
&ipsecerror); |
&ipsecerror); |
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#endif |
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if (sp == NULL) |
destmtu = ipforward_rt.ro_rt->rt_ifp->if_mtu; |
destifp = ipforward_rt.ro_rt->rt_ifp; |
#if defined(IPSEC) || defined(FAST_IPSEC) |
else { |
if (sp != NULL) { |
/* count IPsec header size */ |
/* count IPsec header size */ |
ipsechdr = ipsec4_hdrsiz(mcopy, |
ipsechdr = ipsec4_hdrsiz(mcopy, |
IPSEC_DIR_OUTBOUND, NULL); |
IPSEC_DIR_OUTBOUND, NULL); |
Line 1992 ip_forward(struct mbuf *m, int srcrt) |
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Line 2007 ip_forward(struct mbuf *m, int srcrt) |
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/* |
/* |
* find the correct route for outer IPv4 |
* find the correct route for outer IPv4 |
* header, compute tunnel MTU. |
* header, compute tunnel MTU. |
* |
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* XXX BUG ALERT |
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* The "dummyifp" code relies upon the fact |
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* that icmp_error() touches only ifp->if_mtu. |
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*/ |
*/ |
/*XXX*/ |
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destifp = NULL; |
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if (sp->req != NULL |
if (sp->req != NULL |
&& sp->req->sav != NULL |
&& sp->req->sav != NULL |
&& sp->req->sav->sah != NULL) { |
&& sp->req->sav->sah != NULL) { |
ro = &sp->req->sav->sah->sa_route; |
ro = &sp->req->sav->sah->sa_route; |
if (ro->ro_rt && ro->ro_rt->rt_ifp) { |
if (ro->ro_rt && ro->ro_rt->rt_ifp) { |
dummyifp.if_mtu = |
destmtu = |
ro->ro_rt->rt_rmx.rmx_mtu ? |
ro->ro_rt->rt_rmx.rmx_mtu ? |
ro->ro_rt->rt_rmx.rmx_mtu : |
ro->ro_rt->rt_rmx.rmx_mtu : |
ro->ro_rt->rt_ifp->if_mtu; |
ro->ro_rt->rt_ifp->if_mtu; |
dummyifp.if_mtu -= ipsechdr; |
destmtu -= ipsechdr; |
destifp = &dummyifp; |
|
} |
} |
} |
} |
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Line 2019 ip_forward(struct mbuf *m, int srcrt) |
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Line 2028 ip_forward(struct mbuf *m, int srcrt) |
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KEY_FREESP(&sp); |
KEY_FREESP(&sp); |
#endif |
#endif |
} |
} |
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#endif /*defined(IPSEC) || defined(FAST_IPSEC)*/ |
} |
} |
#endif /*IPSEC*/ |
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ipstat.ips_cantfrag++; |
ipstat.ips_cantfrag++; |
break; |
break; |
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Line 2041 ip_forward(struct mbuf *m, int srcrt) |
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Line 2050 ip_forward(struct mbuf *m, int srcrt) |
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break; |
break; |
#endif |
#endif |
} |
} |
icmp_error(mcopy, type, code, dest, destifp); |
icmp_error(mcopy, type, code, dest, destmtu); |
} |
} |
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void |
void |
Line 2102 ip_savecontrol(struct inpcb *inp, struct |
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Line 2111 ip_savecontrol(struct inpcb *inp, struct |
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} |
} |
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/* |
/* |
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* sysctl helper routine for net.inet.ip.forwsrcrt. |
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*/ |
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static int |
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sysctl_net_inet_ip_forwsrcrt(SYSCTLFN_ARGS) |
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{ |
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int error, tmp; |
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struct sysctlnode node; |
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|
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node = *rnode; |
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tmp = ip_forwsrcrt; |
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node.sysctl_data = &tmp; |
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error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
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if (error || newp == NULL) |
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return (error); |
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|
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if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_FORWSRCRT, |
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0, NULL, NULL, NULL)) |
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return (EPERM); |
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|
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ip_forwsrcrt = tmp; |
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return (0); |
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} |
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|
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/* |
* sysctl helper routine for net.inet.ip.mtudisctimeout. checks the |
* sysctl helper routine for net.inet.ip.mtudisctimeout. checks the |
* range of the new value and tweaks timers if it changes. |
* range of the new value and tweaks timers if it changes. |
*/ |
*/ |
Line 2202 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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Line 2236 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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IPCTL_DEFMTU, CTL_EOL); |
IPCTL_DEFMTU, CTL_EOL); |
#endif /* IPCTL_DEFMTU */ |
#endif /* IPCTL_DEFMTU */ |
sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READONLY1, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "forwsrcrt", |
CTLTYPE_INT, "forwsrcrt", |
SYSCTL_DESCR("Enable forwarding of source-routed " |
SYSCTL_DESCR("Enable forwarding of source-routed " |
"datagrams"), |
"datagrams"), |
NULL, 0, &ip_forwsrcrt, 0, |
sysctl_net_inet_ip_forwsrcrt, 0, &ip_forwsrcrt, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_FORWSRCRT, CTL_EOL); |
IPCTL_FORWSRCRT, CTL_EOL); |
sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
Line 2341 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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Line 2375 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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NULL, 0, &ip_do_loopback_cksum, 0, |
NULL, 0, &ip_do_loopback_cksum, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_LOOPBACKCKSUM, CTL_EOL); |
IPCTL_LOOPBACKCKSUM, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_STRUCT, "stats", |
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SYSCTL_DESCR("IP statistics"), |
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NULL, 0, &ipstat, sizeof(ipstat), |
|
CTL_NET, PF_INET, IPPROTO_IP, IPCTL_STATS, |
|
CTL_EOL); |
} |
} |