version 1.218.2.5, 2007/10/27 11:36:08 |
version 1.263, 2008/03/27 00:18:56 |
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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_initid(); |
ip_id = time_second & 0xfffff; |
ip_id = time_second & 0xfffff; |
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ipintrq.ifq_maxlen = ipqmaxlen; |
ipintrq.ifq_maxlen = ipqmaxlen; |
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splx(s); |
splx(s); |
if (m == 0) |
if (m == 0) |
return; |
return; |
MCLAIM(m, &ip_rx_mowner); |
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ip_input(m); |
ip_input(m); |
} |
} |
} |
} |
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* 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)) { |
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uint16_t off; |
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/* |
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* Prevent TCP blind data attacks by not allowing non-initial |
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* fragments to start at less than 68 bytes (minimal fragment |
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* size) and making sure the first fragment is at least 68 |
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* bytes. |
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*/ |
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off = (ntohs(ip->ip_off) & IP_OFFMASK) << 3; |
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if ((off > 0 ? off + hlen : len) < IP_MINFRAGSIZE - 1) { |
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ipstat.ips_badfrags++; |
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goto bad; |
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} |
/* |
/* |
* Look for queue of fragments |
* Look for queue of fragments |
* of this datagram. |
* of this datagram. |
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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) { |
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/* |
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* Make sure the TOS is matches previous |
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* fragments. |
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*/ |
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if (ip->ip_tos != fp->ipq_tos) { |
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ipstat.ips_badfrags++; |
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goto bad; |
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} |
goto found; |
goto found; |
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} |
} |
} |
fp = 0; |
fp = 0; |
found: |
found: |
Line 1106 ip_reass(struct ipqent *ipqe, struct ipq |
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Line 1125 ip_reass(struct ipqent *ipqe, struct ipq |
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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; |
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fp->ipq_tos = ipqe->ipqe_ip->ip_tos; |
TAILQ_INIT(&fp->ipq_fragq); |
TAILQ_INIT(&fp->ipq_fragq); |
fp->ipq_src = ipqe->ipqe_ip->ip_src; |
fp->ipq_src = ipqe->ipqe_ip->ip_src; |
fp->ipq_dst = ipqe->ipqe_ip->ip_dst; |
fp->ipq_dst = ipqe->ipqe_ip->ip_dst; |
Line 1777 ip_srcroute(void) |
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Line 1797 ip_srcroute(void) |
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} |
} |
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const int inetctlerrmap[PRC_NCMDS] = { |
const int inetctlerrmap[PRC_NCMDS] = { |
0, 0, 0, 0, |
[PRC_MSGSIZE] = EMSGSIZE, |
0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH, |
[PRC_HOSTDEAD] = EHOSTDOWN, |
EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED, |
[PRC_HOSTUNREACH] = EHOSTUNREACH, |
EMSGSIZE, EHOSTUNREACH, 0, 0, |
[PRC_UNREACH_NET] = EHOSTUNREACH, |
0, 0, 0, 0, |
[PRC_UNREACH_HOST] = EHOSTUNREACH, |
ENOPROTOOPT |
[PRC_UNREACH_PROTOCOL] = ECONNREFUSED, |
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[PRC_UNREACH_PORT] = ECONNREFUSED, |
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[PRC_UNREACH_SRCFAIL] = EHOSTUNREACH, |
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[PRC_PARAMPROB] = ENOPROTOOPT, |
}; |
}; |
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/* |
/* |
Line 1931 ip_forward(struct mbuf *m, int srcrt) |
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Line 1954 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 != NULL) |
if ((rt = rtcache_validate(&ipforward_rt)) != NULL) { |
destmtu = ipforward_rt.ro_rt->rt_ifp->if_mtu; |
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#else |
#if defined(IPSEC) || defined(FAST_IPSEC) |
/* |
/* |
* If the packet is routed over IPsec tunnel, tell the |
* If the packet is routed over IPsec tunnel, tell the |
* originator the tunnel MTU. |
* originator the tunnel MTU. |
* tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz |
* tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz |
* XXX quickhack!!! |
* XXX quickhack!!! |
*/ |
*/ |
if (ipforward_rt.ro_rt != NULL) { |
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struct secpolicy *sp; |
struct secpolicy *sp; |
int ipsecerror; |
int ipsecerror; |
size_t ipsechdr; |
size_t ipsechdr; |
Line 1950 ip_forward(struct mbuf *m, int srcrt) |
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Line 1973 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 = rt->rt_ifp->if_mtu; |
destmtu = ipforward_rt.ro_rt->rt_ifp->if_mtu; |
#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 1967 ip_forward(struct mbuf *m, int srcrt) |
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Line 1991 ip_forward(struct mbuf *m, int srcrt) |
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&& 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 (rt && rt->rt_ifp) { |
destmtu = |
destmtu = |
ro->ro_rt->rt_rmx.rmx_mtu ? |
rt->rt_rmx.rmx_mtu ? |
ro->ro_rt->rt_rmx.rmx_mtu : |
rt->rt_rmx.rmx_mtu : |
ro->ro_rt->rt_ifp->if_mtu; |
rt->rt_ifp->if_mtu; |
destmtu -= ipsechdr; |
destmtu -= ipsechdr; |
} |
} |
} |
} |
Line 1982 ip_forward(struct mbuf *m, int srcrt) |
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Line 2006 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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