version 1.355, 2017/06/01 02:45:14 |
version 1.371, 2018/02/05 15:18:10 |
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* SUCH DAMAGE. |
* SUCH DAMAGE. |
*/ |
*/ |
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/*- |
/* |
* Copyright (c) 1998 The NetBSD Foundation, Inc. |
* Copyright (c) 1998 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
* |
* |
Line 95 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 95 __KERNEL_RCSID(0, "$NetBSD$"); |
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#ifdef _KERNEL_OPT |
#ifdef _KERNEL_OPT |
#include "opt_inet.h" |
#include "opt_inet.h" |
#include "opt_compat_netbsd.h" |
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#include "opt_gateway.h" |
#include "opt_gateway.h" |
#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
#include "opt_mrouting.h" |
#include "opt_mrouting.h" |
Line 154 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 153 __KERNEL_RCSID(0, "$NetBSD$"); |
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#ifndef IPFORWARDING |
#ifndef IPFORWARDING |
#ifdef GATEWAY |
#ifdef GATEWAY |
#define IPFORWARDING 1 /* forward IP packets not for us */ |
#define IPFORWARDING 1 /* forward IP packets not for us */ |
#else /* GATEWAY */ |
#else |
#define IPFORWARDING 0 /* don't forward IP packets not for us */ |
#define IPFORWARDING 0 /* don't forward IP packets not for us */ |
#endif /* GATEWAY */ |
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#endif /* IPFORWARDING */ |
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#ifndef IPSENDREDIRECTS |
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#define IPSENDREDIRECTS 1 |
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#endif |
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#ifndef IPFORWSRCRT |
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#define IPFORWSRCRT 1 /* forward source-routed packets */ |
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#endif |
#endif |
#ifndef IPALLOWSRCRT |
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#define IPALLOWSRCRT 1 /* allow source-routed packets */ |
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#endif |
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#ifndef IPMTUDISC |
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#define IPMTUDISC 1 |
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#endif |
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#ifndef IPMTUDISCTIMEOUT |
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#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */ |
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#endif |
#endif |
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#ifdef COMPAT_50 |
#ifndef IPSENDREDIRECTS |
#include <compat/sys/time.h> |
#define IPSENDREDIRECTS 1 |
#include <compat/sys/socket.h> |
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#endif |
#endif |
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/* |
#ifndef IPMTUDISCTIMEOUT |
* Note: DIRECTED_BROADCAST is handled this way so that previous |
#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */ |
* configuration using this option will Just Work. |
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*/ |
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#ifndef IPDIRECTEDBCAST |
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#ifdef DIRECTED_BROADCAST |
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#define IPDIRECTEDBCAST 1 |
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#else |
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#define IPDIRECTEDBCAST 0 |
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#endif /* DIRECTED_BROADCAST */ |
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#endif /* IPDIRECTEDBCAST */ |
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int ipforwarding = IPFORWARDING; |
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int ipsendredirects = IPSENDREDIRECTS; |
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int ip_defttl = IPDEFTTL; |
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int ip_forwsrcrt = IPFORWSRCRT; |
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int ip_directedbcast = IPDIRECTEDBCAST; |
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int ip_allowsrcrt = IPALLOWSRCRT; |
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int ip_mtudisc = IPMTUDISC; |
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int ip_mtudisc_timeout = IPMTUDISCTIMEOUT; |
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#ifdef DIAGNOSTIC |
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int ipprintfs = 0; |
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#endif |
#endif |
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int ip_do_randomid = 0; |
int ipforwarding = IPFORWARDING; |
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int ipsendredirects = IPSENDREDIRECTS; |
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int ip_defttl = IPDEFTTL; |
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int ip_forwsrcrt = 0; |
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int ip_directedbcast = 0; |
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int ip_allowsrcrt = 0; |
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int ip_mtudisc = 1; |
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int ip_mtudisc_timeout = IPMTUDISCTIMEOUT; |
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int ip_do_randomid = 0; |
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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 377 ip_match_our_address(struct ifnet *ifp, |
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Line 349 ip_match_our_address(struct ifnet *ifp, |
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continue; |
continue; |
if (checkif && ia->ia_ifp != ifp) |
if (checkif && ia->ia_ifp != ifp) |
continue; |
continue; |
if ((ia->ia_ifp->if_flags & IFF_UP) != 0 && |
if ((ia->ia_ifp->if_flags & IFF_UP) == 0) { |
(ia->ia4_flags & IN_IFF_DETACHED) == 0) |
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break; |
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else |
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(*downmatch)++; |
(*downmatch)++; |
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continue; |
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} |
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if (ia->ia4_flags & IN_IFF_DETACHED && |
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(ifp->if_flags & IFF_LOOPBACK) == 0) |
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continue; |
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break; |
} |
} |
} |
} |
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Line 398 ip_match_our_address_broadcast(struct if |
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Line 373 ip_match_our_address_broadcast(struct if |
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if (ifa->ifa_addr->sa_family != AF_INET) |
if (ifa->ifa_addr->sa_family != AF_INET) |
continue; |
continue; |
ia = ifatoia(ifa); |
ia = ifatoia(ifa); |
if (ia->ia4_flags & (IN_IFF_NOTREADY | IN_IFF_DETACHED)) |
if (ia->ia4_flags & IN_IFF_NOTREADY) |
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continue; |
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if (ia->ia4_flags & IN_IFF_DETACHED && |
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(ifp->if_flags & IFF_LOOPBACK) == 0) |
continue; |
continue; |
if (in_hosteq(ip->ip_dst, ia->ia_broadaddr.sin_addr) || |
if (in_hosteq(ip->ip_dst, ia->ia_broadaddr.sin_addr) || |
in_hosteq(ip->ip_dst, ia->ia_netbroadcast) || |
in_hosteq(ip->ip_dst, ia->ia_netbroadcast) || |
Line 432 ipintr(void *arg __unused) |
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Line 410 ipintr(void *arg __unused) |
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KASSERT(cpu_softintr_p()); |
KASSERT(cpu_softintr_p()); |
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#ifndef NET_MPSAFE |
SOFTNET_LOCK_UNLESS_NET_MPSAFE(); |
mutex_enter(softnet_lock); |
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#endif |
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while ((m = pktq_dequeue(ip_pktq)) != NULL) { |
while ((m = pktq_dequeue(ip_pktq)) != NULL) { |
ip_input(m); |
ip_input(m); |
} |
} |
#ifndef NET_MPSAFE |
SOFTNET_UNLOCK_UNLESS_NET_MPSAFE(); |
mutex_exit(softnet_lock); |
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#endif |
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} |
} |
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/* |
/* |
Line 486 ip_input(struct mbuf *m) |
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Line 460 ip_input(struct mbuf *m) |
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*/ |
*/ |
if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) { |
if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) { |
if ((m = m_copyup(m, sizeof(struct ip), |
if ((m = m_copyup(m, sizeof(struct ip), |
(max_linkhdr + 3) & ~3)) == NULL) { |
(max_linkhdr + 3) & ~3)) == NULL) { |
/* XXXJRT new stat, please */ |
/* XXXJRT new stat, please */ |
IP_STATINC(IP_STAT_TOOSMALL); |
IP_STATINC(IP_STAT_TOOSMALL); |
goto out; |
goto out; |
} |
} |
} else if (__predict_false(m->m_len < sizeof (struct ip))) { |
} else if (__predict_false(m->m_len < sizeof(struct ip))) { |
if ((m = m_pullup(m, sizeof (struct ip))) == NULL) { |
if ((m = m_pullup(m, sizeof(struct ip))) == NULL) { |
IP_STATINC(IP_STAT_TOOSMALL); |
IP_STATINC(IP_STAT_TOOSMALL); |
goto out; |
goto out; |
} |
} |
Line 534 ip_input(struct mbuf *m) |
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Line 508 ip_input(struct mbuf *m) |
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} |
} |
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switch (m->m_pkthdr.csum_flags & |
switch (m->m_pkthdr.csum_flags & |
((ifp->if_csum_flags_rx & M_CSUM_IPv4) | |
((ifp->if_csum_flags_rx & M_CSUM_IPv4) | M_CSUM_IPv4_BAD)) { |
M_CSUM_IPv4_BAD)) { |
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case M_CSUM_IPv4|M_CSUM_IPv4_BAD: |
case M_CSUM_IPv4|M_CSUM_IPv4_BAD: |
INET_CSUM_COUNTER_INCR(&ip_hwcsum_bad); |
INET_CSUM_COUNTER_INCR(&ip_hwcsum_bad); |
IP_STATINC(IP_STAT_BADSUM); |
IP_STATINC(IP_STAT_BADSUM); |
Line 574 ip_input(struct mbuf *m) |
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Line 547 ip_input(struct mbuf *m) |
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} |
} |
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/* |
/* |
* Check that the amount of data in the buffers |
* Check that the amount of data in the buffers is at least as much |
* is as at least much as the IP header would have us expect. |
* as the IP header would have us expect. Trim mbufs if longer than |
* Trim mbufs if longer than we expect. |
* we expect. Drop packet if shorter than we expect. |
* Drop packet if shorter than we expect. |
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*/ |
*/ |
if (m->m_pkthdr.len < len) { |
if (m->m_pkthdr.len < len) { |
IP_STATINC(IP_STAT_TOOSHORT); |
IP_STATINC(IP_STAT_TOOSHORT); |
Line 658 ip_input(struct mbuf *m) |
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Line 630 ip_input(struct mbuf *m) |
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* error was detected (causing an icmp message |
* error was detected (causing an icmp message |
* to be sent and the original packet to be freed). |
* to be sent and the original packet to be freed). |
*/ |
*/ |
if (hlen > sizeof (struct ip) && ip_dooptions(m)) { |
if (hlen > sizeof(struct ip) && ip_dooptions(m)) { |
m = NULL; |
m = NULL; |
goto out; |
goto out; |
} |
} |
Line 758 ip_input(struct mbuf *m) |
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Line 730 ip_input(struct mbuf *m) |
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return; |
return; |
} |
} |
#ifdef IPSEC |
#ifdef IPSEC |
/* Perform IPsec, if any. */ |
/* Check the security policy (SP) for the packet */ |
if (ipsec_used) { |
if (ipsec_used) { |
SOFTNET_LOCK(); |
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if (ipsec4_input(m, IP_FORWARDING | |
if (ipsec4_input(m, IP_FORWARDING | |
(ip_directedbcast ? IP_ALLOWBROADCAST : 0)) != 0) { |
(ip_directedbcast ? IP_ALLOWBROADCAST : 0)) != 0) { |
SOFTNET_UNLOCK(); |
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goto out; |
goto out; |
} |
} |
SOFTNET_UNLOCK(); |
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} |
} |
#endif |
#endif |
ip_forward(m, srcrt, ifp); |
ip_forward(m, srcrt, ifp); |
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} |
} |
/* |
/* |
* Reassembly is done, we have the final packet. |
* Reassembly is done, we have the final packet. |
* Updated cached data in local variable(s). |
* Update cached data in local variable(s). |
*/ |
*/ |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
hlen = ip->ip_hl << 2; |
hlen = ip->ip_hl << 2; |
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*/ |
*/ |
if (ipsec_used && |
if (ipsec_used && |
(inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0) { |
(inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0) { |
SOFTNET_LOCK(); |
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if (ipsec4_input(m, 0) != 0) { |
if (ipsec4_input(m, 0) != 0) { |
SOFTNET_UNLOCK(); |
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goto out; |
goto out; |
} |
} |
SOFTNET_UNLOCK(); |
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} |
} |
#endif |
#endif |
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const int off = hlen, nh = ip->ip_p; |
const int off = hlen, nh = ip->ip_p; |
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SOFTNET_LOCK(); |
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(*inetsw[ip_protox[nh]].pr_input)(m, off, nh); |
(*inetsw[ip_protox[nh]].pr_input)(m, off, nh); |
SOFTNET_UNLOCK(); |
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return; |
return; |
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out: |
out: |
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ip_slowtimo(void) |
ip_slowtimo(void) |
{ |
{ |
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#ifndef NET_MPSAFE |
SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); |
mutex_enter(softnet_lock); |
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KERNEL_LOCK(1, NULL); |
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#endif |
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ip_reass_slowtimo(); |
ip_reass_slowtimo(); |
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#ifndef NET_MPSAFE |
SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); |
KERNEL_UNLOCK_ONE(NULL); |
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mutex_exit(softnet_lock); |
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#endif |
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} |
} |
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/* |
/* |
Line 896 ip_dooptions(struct mbuf *m) |
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Line 854 ip_dooptions(struct mbuf *m) |
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struct ip_timestamp *ipt; |
struct ip_timestamp *ipt; |
struct in_ifaddr *ia; |
struct in_ifaddr *ia; |
int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0; |
int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0; |
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int srr_present, rr_present, ts_present; |
struct in_addr dst; |
struct in_addr dst; |
n_time ntime; |
n_time ntime; |
struct ifaddr *ifa = NULL; |
struct ifaddr *ifa = NULL; |
int s; |
int s; |
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srr_present = 0; |
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rr_present = 0; |
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ts_present = 0; |
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dst = ip->ip_dst; |
dst = ip->ip_dst; |
cp = (u_char *)(ip + 1); |
cp = (u_char *)(ip + 1); |
cnt = (ip->ip_hl << 2) - sizeof (struct ip); |
cnt = (ip->ip_hl << 2) - sizeof(struct ip); |
for (; cnt > 0; cnt -= optlen, cp += optlen) { |
for (; cnt > 0; cnt -= optlen, cp += optlen) { |
opt = cp[IPOPT_OPTVAL]; |
opt = cp[IPOPT_OPTVAL]; |
if (opt == IPOPT_EOL) |
if (opt == IPOPT_EOL) |
Line 948 ip_dooptions(struct mbuf *m) |
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Line 911 ip_dooptions(struct mbuf *m) |
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code = ICMP_UNREACH_NET_PROHIB; |
code = ICMP_UNREACH_NET_PROHIB; |
goto bad; |
goto bad; |
} |
} |
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if (srr_present++) { |
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code = &cp[IPOPT_OPTVAL] - (u_char *)ip; |
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goto bad; |
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} |
if (optlen < IPOPT_OFFSET + sizeof(*cp)) { |
if (optlen < IPOPT_OFFSET + sizeof(*cp)) { |
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
goto bad; |
goto bad; |
Line 1022 ip_dooptions(struct mbuf *m) |
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Line 989 ip_dooptions(struct mbuf *m) |
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.sin_family = AF_INET, |
.sin_family = AF_INET, |
}; |
}; |
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if (rr_present++) { |
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code = &cp[IPOPT_OPTVAL] - (u_char *)ip; |
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goto bad; |
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} |
if (optlen < IPOPT_OFFSET + sizeof(*cp)) { |
if (optlen < IPOPT_OFFSET + sizeof(*cp)) { |
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
code = &cp[IPOPT_OLEN] - (u_char *)ip; |
goto bad; |
goto bad; |
Line 1063 ip_dooptions(struct mbuf *m) |
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Line 1034 ip_dooptions(struct mbuf *m) |
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case IPOPT_TS: |
case IPOPT_TS: |
code = cp - (u_char *)ip; |
code = cp - (u_char *)ip; |
ipt = (struct ip_timestamp *)cp; |
ipt = (struct ip_timestamp *)cp; |
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if (ts_present++) { |
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code = &cp[IPOPT_OPTVAL] - (u_char *)ip; |
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goto bad; |
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} |
if (ipt->ipt_len < 4 || ipt->ipt_len > 40) { |
if (ipt->ipt_len < 4 || ipt->ipt_len > 40) { |
code = (u_char *)&ipt->ipt_len - (u_char *)ip; |
code = (u_char *)&ipt->ipt_len - (u_char *)ip; |
goto bad; |
goto bad; |
Line 1071 ip_dooptions(struct mbuf *m) |
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Line 1046 ip_dooptions(struct mbuf *m) |
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code = (u_char *)&ipt->ipt_ptr - (u_char *)ip; |
code = (u_char *)&ipt->ipt_ptr - (u_char *)ip; |
goto bad; |
goto bad; |
} |
} |
if (ipt->ipt_ptr > ipt->ipt_len - sizeof (int32_t)) { |
if (ipt->ipt_ptr > ipt->ipt_len - sizeof(int32_t)) { |
if (++ipt->ipt_oflw == 0) { |
if (++ipt->ipt_oflw == 0) { |
code = (u_char *)&ipt->ipt_ptr - |
code = (u_char *)&ipt->ipt_ptr - |
(u_char *)ip; |
(u_char *)ip; |
Line 1521 ip_savecontrol(struct inpcb *inp, struct |
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Line 1496 ip_savecontrol(struct inpcb *inp, struct |
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struct mbuf *m) |
struct mbuf *m) |
{ |
{ |
struct socket *so = inp->inp_socket; |
struct socket *so = inp->inp_socket; |
ifnet_t *ifp; |
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int inpflags = inp->inp_flags; |
int inpflags = inp->inp_flags; |
struct psref psref; |
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ifp = m_get_rcvif_psref(m, &psref); |
if (SOOPT_TIMESTAMP(so->so_options)) |
if (__predict_false(ifp == NULL)) |
mp = sbsavetimestamp(so->so_options, m, mp); |
return; /* XXX should report error? */ |
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if (so->so_options & SO_TIMESTAMP |
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#ifdef SO_OTIMESTAMP |
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|| so->so_options & SO_OTIMESTAMP |
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#endif |
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) { |
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struct timeval tv; |
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microtime(&tv); |
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#ifdef SO_OTIMESTAMP |
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if (so->so_options & SO_OTIMESTAMP) { |
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struct timeval50 tv50; |
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timeval_to_timeval50(&tv, &tv50); |
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*mp = sbcreatecontrol((void *) &tv50, sizeof(tv50), |
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SCM_OTIMESTAMP, SOL_SOCKET); |
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} else |
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#endif |
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*mp = sbcreatecontrol((void *) &tv, sizeof(tv), |
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SCM_TIMESTAMP, SOL_SOCKET); |
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if (*mp) |
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mp = &(*mp)->m_next; |
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} |
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if (inpflags & INP_RECVDSTADDR) { |
if (inpflags & INP_RECVDSTADDR) { |
*mp = sbcreatecontrol((void *) &ip->ip_dst, |
*mp = sbcreatecontrol(&ip->ip_dst, |
sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP); |
sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (inpflags & INP_RECVPKTINFO) { |
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struct in_pktinfo ipi; |
if (inpflags & INP_RECVTTL) { |
ipi.ipi_addr = ip->ip_src; |
*mp = sbcreatecontrol(&ip->ip_ttl, |
ipi.ipi_ifindex = ifp->if_index; |
sizeof(uint8_t), IP_RECVTTL, IPPROTO_IP); |
*mp = sbcreatecontrol((void *) &ipi, |
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sizeof(ipi), IP_RECVPKTINFO, IPPROTO_IP); |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (inpflags & INP_PKTINFO) { |
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struct psref psref; |
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ifnet_t *ifp = m_get_rcvif_psref(m, &psref); |
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if (__predict_false(ifp == NULL)) { |
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#ifdef DIAGNOSTIC |
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printf("%s: missing receive interface\n", __func__); |
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#endif |
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return; /* XXX should report error? */ |
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} |
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if (inpflags & INP_RECVPKTINFO) { |
struct in_pktinfo ipi; |
struct in_pktinfo ipi; |
ipi.ipi_addr = ip->ip_dst; |
ipi.ipi_addr = ip->ip_dst; |
ipi.ipi_ifindex = ifp->if_index; |
ipi.ipi_ifindex = ifp->if_index; |
*mp = sbcreatecontrol((void *) &ipi, |
*mp = sbcreatecontrol(&ipi, |
sizeof(ipi), IP_PKTINFO, IPPROTO_IP); |
sizeof(ipi), IP_PKTINFO, IPPROTO_IP); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
Line 1583 ip_savecontrol(struct inpcb *inp, struct |
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Line 1542 ip_savecontrol(struct inpcb *inp, struct |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (inpflags & INP_RECVTTL) { |
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*mp = sbcreatecontrol((void *) &ip->ip_ttl, |
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sizeof(uint8_t), IP_RECVTTL, IPPROTO_IP); |
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if (*mp) |
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mp = &(*mp)->m_next; |
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} |
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m_put_rcvif_psref(ifp, &psref); |
m_put_rcvif_psref(ifp, &psref); |
} |
} |
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