version 1.245.2.4, 2007/08/20 21:27:59 |
version 1.260, 2007/12/22 15:41:11 |
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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: |
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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 1107 ip_reass(struct ipqent *ipqe, struct ipq |
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Line 1124 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 1795 ip_srcroute(void) |
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return (m); |
return (m); |
} |
} |
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/* |
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* Strip out IP options, at higher |
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* level protocol in the kernel. |
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* Second argument is buffer to which options |
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* will be moved, and return value is their length. |
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* XXX should be deleted; last arg currently ignored. |
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*/ |
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void |
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ip_stripoptions(struct mbuf *m, struct mbuf *mopt) |
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{ |
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int i; |
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struct ip *ip = mtod(m, struct ip *); |
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void *opts; |
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int olen; |
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olen = (ip->ip_hl << 2) - sizeof (struct ip); |
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opts = (void *)(ip + 1); |
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i = m->m_len - (sizeof (struct ip) + olen); |
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memmove(opts, (char *)opts + olen, (unsigned)i); |
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m->m_len -= olen; |
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if (m->m_flags & M_PKTHDR) |
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m->m_pkthdr.len -= olen; |
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ip->ip_len = htons(ntohs(ip->ip_len) - olen); |
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ip->ip_hl = sizeof (struct ip) >> 2; |
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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 1959 ip_forward(struct mbuf *m, int srcrt) |
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Line 1954 ip_forward(struct mbuf *m, int srcrt) |
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type = ICMP_UNREACH; |
type = ICMP_UNREACH; |
code = ICMP_UNREACH_NEEDFRAG; |
code = ICMP_UNREACH_NEEDFRAG; |
#if !defined(IPSEC) && !defined(FAST_IPSEC) |
#if !defined(IPSEC) && !defined(FAST_IPSEC) |
if (ipforward_rt.ro_rt != NULL) |
if ((rt = rtcache_getrt(&ipforward_rt)) != NULL) |
destmtu = ipforward_rt.ro_rt->rt_ifp->if_mtu; |
destmtu = rt->rt_ifp->if_mtu; |
#else |
#else |
/* |
/* |
* If the packet is routed over IPsec tunnel, tell the |
* If the packet is routed over IPsec tunnel, tell the |
Line 1968 ip_forward(struct mbuf *m, int srcrt) |
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Line 1963 ip_forward(struct mbuf *m, int srcrt) |
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* 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) { |
if ((rt = rtcache_getrt(&ipforward_rt)) != NULL) { |
struct secpolicy *sp; |
struct secpolicy *sp; |
int ipsecerror; |
int ipsecerror; |
size_t ipsechdr; |
size_t ipsechdr; |
Line 1979 ip_forward(struct mbuf *m, int srcrt) |
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Line 1974 ip_forward(struct mbuf *m, int srcrt) |
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&ipsecerror); |
&ipsecerror); |
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if (sp == NULL) |
if (sp == NULL) |
destmtu = ipforward_rt.ro_rt->rt_ifp->if_mtu; |
destmtu = rt->rt_ifp->if_mtu; |
else { |
else { |
/* count IPsec header size */ |
/* count IPsec header size */ |
ipsechdr = ipsec4_hdrsiz(mcopy, |
ipsechdr = ipsec4_hdrsiz(mcopy, |
Line 1994 ip_forward(struct mbuf *m, int srcrt) |
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Line 1989 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 2079 ip_savecontrol(struct inpcb *inp, struct |
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Line 2074 ip_savecontrol(struct inpcb *inp, struct |
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if (inp->inp_flags & INP_RECVIF) { |
if (inp->inp_flags & INP_RECVIF) { |
struct sockaddr_dl sdl; |
struct sockaddr_dl sdl; |
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sockaddr_dl_init(&sdl, (m->m_pkthdr.rcvif != NULL) ? |
sockaddr_dl_init(&sdl, sizeof(sdl), |
m->m_pkthdr.rcvif->if_index : 0, 0, NULL, 0, NULL, 0); |
(m->m_pkthdr.rcvif != NULL) |
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? m->m_pkthdr.rcvif->if_index |
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: 0, |
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0, NULL, 0, NULL, 0); |
*mp = sbcreatecontrol(&sdl, sdl.sdl_len, IP_RECVIF, IPPROTO_IP); |
*mp = sbcreatecontrol(&sdl, sdl.sdl_len, IP_RECVIF, IPPROTO_IP); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |