version 1.353, 2017/03/31 06:42:19 |
version 1.355.2.6, 2018/03/18 10:57:01 |
Line 162 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 162 __KERNEL_RCSID(0, "$NetBSD$"); |
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#define IPSENDREDIRECTS 1 |
#define IPSENDREDIRECTS 1 |
#endif |
#endif |
#ifndef IPFORWSRCRT |
#ifndef IPFORWSRCRT |
#define IPFORWSRCRT 1 /* forward source-routed packets */ |
#define IPFORWSRCRT 0 /* forward source-routed packets */ |
#endif |
#endif |
#ifndef IPALLOWSRCRT |
#ifndef IPALLOWSRCRT |
#define IPALLOWSRCRT 1 /* allow source-routed packets */ |
#define IPALLOWSRCRT 0 /* allow source-routed packets */ |
#endif |
#endif |
#ifndef IPMTUDISC |
#ifndef IPMTUDISC |
#define IPMTUDISC 1 |
#define IPMTUDISC 1 |
Line 253 EVCNT_ATTACH_STATIC(ip_swcsum); |
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Line 253 EVCNT_ATTACH_STATIC(ip_swcsum); |
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#endif /* INET_CSUM_COUNTERS */ |
#endif /* INET_CSUM_COUNTERS */ |
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/* |
/* |
* We need to save the IP options in case a protocol wants to respond |
* Used to save the IP options in case a protocol wants to respond |
* to an incoming packet over the same route if the packet got here |
* to an incoming packet over the same route if the packet got here |
* using IP source routing. This allows connection establishment and |
* using IP source routing. This allows connection establishment and |
* maintenance when the remote end is on a network that is not known |
* maintenance when the remote end is on a network that is not known |
* to us. |
* to us. |
*/ |
*/ |
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struct ip_srcrt { |
static int ip_nhops = 0; |
int isr_nhops; /* number of hops */ |
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struct in_addr isr_dst; /* final destination */ |
static struct ip_srcrt { |
char isr_nop; /* one NOP to align */ |
struct in_addr dst; /* final destination */ |
char isr_hdr[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN & OFFSET */ |
char nop; /* one NOP to align */ |
struct in_addr isr_routes[MAX_IPOPTLEN/sizeof(struct in_addr)]; |
char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */ |
}; |
struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)]; |
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} ip_srcrt; |
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static int ip_drainwanted; |
static int ip_drainwanted; |
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static void save_rte(u_char *, struct in_addr); |
static void save_rte(struct mbuf *, u_char *, struct in_addr); |
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#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
struct mowner ip_rx_mowner = MOWNER_INIT("internet", "rx"); |
struct mowner ip_rx_mowner = MOWNER_INIT("internet", "rx"); |
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#endif /* MBUFTRACE */ |
#endif /* MBUFTRACE */ |
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ipstat_percpu = percpu_alloc(sizeof(uint64_t) * IP_NSTATS); |
ipstat_percpu = percpu_alloc(sizeof(uint64_t) * IP_NSTATS); |
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ipforward_rt_percpu = percpu_alloc(sizeof(struct route)); |
ipforward_rt_percpu = percpu_alloc(sizeof(struct route)); |
if (ipforward_rt_percpu == NULL) |
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panic("failed to allocate ipforward_rt_percpu"); |
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ip_mtudisc_timeout_q = rt_timer_queue_create(ip_mtudisc_timeout); |
ip_mtudisc_timeout_q = rt_timer_queue_create(ip_mtudisc_timeout); |
} |
} |
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Line 383 ip_match_our_address(struct ifnet *ifp, |
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Line 377 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 404 ip_match_our_address_broadcast(struct if |
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Line 401 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 438 ipintr(void *arg __unused) |
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Line 438 ipintr(void *arg __unused) |
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KASSERT(cpu_softintr_p()); |
KASSERT(cpu_softintr_p()); |
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#ifndef NET_MPSAFE |
SOFTNET_KERNEL_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_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); |
mutex_exit(softnet_lock); |
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#endif |
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} |
} |
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/* |
/* |
Line 664 ip_input(struct mbuf *m) |
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Line 660 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). |
*/ |
*/ |
ip_nhops = 0; /* for source routed packets */ |
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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 765 ip_input(struct mbuf *m) |
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Line 760 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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*/ |
*/ |
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 987 ip_dooptions(struct mbuf *m) |
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Line 968 ip_dooptions(struct mbuf *m) |
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/* |
/* |
* End of source route. Should be for us. |
* End of source route. Should be for us. |
*/ |
*/ |
save_rte(cp, ip->ip_src); |
save_rte(m, cp, ip->ip_src); |
break; |
break; |
} |
} |
/* |
/* |
Line 1226 ip_rtaddr(struct in_addr dst, struct psr |
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Line 1207 ip_rtaddr(struct in_addr dst, struct psr |
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* up later by ip_srcroute if the receiver is interested. |
* up later by ip_srcroute if the receiver is interested. |
*/ |
*/ |
static void |
static void |
save_rte(u_char *option, struct in_addr dst) |
save_rte(struct mbuf *m, u_char *option, struct in_addr dst) |
{ |
{ |
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struct ip_srcrt *isr; |
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struct m_tag *mtag; |
unsigned olen; |
unsigned olen; |
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olen = option[IPOPT_OLEN]; |
olen = option[IPOPT_OLEN]; |
if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst))) |
if (olen > sizeof(isr->isr_hdr) + sizeof(isr->isr_routes)) |
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return; |
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mtag = m_tag_get(PACKET_TAG_SRCROUTE, sizeof(*isr), M_NOWAIT); |
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if (mtag == NULL) |
return; |
return; |
memcpy((void *)ip_srcrt.srcopt, (void *)option, olen); |
isr = (struct ip_srcrt *)(mtag + 1); |
ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr); |
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ip_srcrt.dst = dst; |
memcpy(isr->isr_hdr, option, olen); |
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isr->isr_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr); |
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isr->isr_dst = dst; |
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m_tag_prepend(m, mtag); |
} |
} |
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/* |
/* |
Line 1244 save_rte(u_char *option, struct in_addr |
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Line 1234 save_rte(u_char *option, struct in_addr |
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* The first hop is placed before the options, will be removed later. |
* The first hop is placed before the options, will be removed later. |
*/ |
*/ |
struct mbuf * |
struct mbuf * |
ip_srcroute(void) |
ip_srcroute(struct mbuf *m0) |
{ |
{ |
struct in_addr *p, *q; |
struct in_addr *p, *q; |
struct mbuf *m; |
struct mbuf *m; |
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struct ip_srcrt *isr; |
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struct m_tag *mtag; |
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if (ip_nhops == 0) |
mtag = m_tag_find(m0, PACKET_TAG_SRCROUTE, NULL); |
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if (mtag == NULL) |
return NULL; |
return NULL; |
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isr = (struct ip_srcrt *)(mtag + 1); |
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if (isr->isr_nhops == 0) |
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return NULL; |
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m = m_get(M_DONTWAIT, MT_SOOPTS); |
m = m_get(M_DONTWAIT, MT_SOOPTS); |
if (m == 0) |
if (m == NULL) |
return NULL; |
return NULL; |
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MCLAIM(m, &inetdomain.dom_mowner); |
MCLAIM(m, &inetdomain.dom_mowner); |
#define OPTSIZ (sizeof(ip_srcrt.nop) + sizeof(ip_srcrt.srcopt)) |
#define OPTSIZ (sizeof(isr->isr_nop) + sizeof(isr->isr_hdr)) |
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/* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */ |
/* length is (nhops+1)*sizeof(addr) + sizeof(nop + header) */ |
m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) + |
m->m_len = (isr->isr_nhops + 1) * sizeof(struct in_addr) + OPTSIZ; |
OPTSIZ; |
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/* |
/* |
* First save first hop for return route |
* First save first hop for return route |
*/ |
*/ |
p = &ip_srcrt.route[ip_nhops - 1]; |
p = &(isr->isr_routes[isr->isr_nhops - 1]); |
*(mtod(m, struct in_addr *)) = *p--; |
*(mtod(m, struct in_addr *)) = *p--; |
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/* |
/* |
* Copy option fields and padding (nop) to mbuf. |
* Copy option fields and padding (nop) to mbuf. |
*/ |
*/ |
ip_srcrt.nop = IPOPT_NOP; |
isr->isr_nop = IPOPT_NOP; |
ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF; |
isr->isr_hdr[IPOPT_OFFSET] = IPOPT_MINOFF; |
memmove(mtod(m, char *) + sizeof(struct in_addr), &ip_srcrt.nop, |
memmove(mtod(m, char *) + sizeof(struct in_addr), &isr->isr_nop, |
OPTSIZ); |
OPTSIZ); |
q = (struct in_addr *)(mtod(m, char *) + |
q = (struct in_addr *)(mtod(m, char *) + |
sizeof(struct in_addr) + OPTSIZ); |
sizeof(struct in_addr) + OPTSIZ); |
Line 1282 ip_srcroute(void) |
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Line 1279 ip_srcroute(void) |
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* Record return path as an IP source route, |
* Record return path as an IP source route, |
* reversing the path (pointers are now aligned). |
* reversing the path (pointers are now aligned). |
*/ |
*/ |
while (p >= ip_srcrt.route) { |
while (p >= isr->isr_routes) { |
*q++ = *p--; |
*q++ = *p--; |
} |
} |
/* |
/* |
* Last hop goes to final destination. |
* Last hop goes to final destination. |
*/ |
*/ |
*q = ip_srcrt.dst; |
*q = isr->isr_dst; |
return (m); |
m_tag_delete(m0, mtag); |
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return m; |
} |
} |
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const int inetctlerrmap[PRC_NCMDS] = { |
const int inetctlerrmap[PRC_NCMDS] = { |
Line 1548 ip_savecontrol(struct inpcb *inp, struct |
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Line 1546 ip_savecontrol(struct inpcb *inp, struct |
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} |
} |
if (inpflags & INP_RECVPKTINFO) { |
if (inpflags & INP_RECVPKTINFO) { |
struct in_pktinfo ipi; |
struct in_pktinfo ipi; |
ipi.ipi_addr = ip->ip_src; |
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ipi.ipi_ifindex = ifp->if_index; |
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*mp = sbcreatecontrol((void *) &ipi, |
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sizeof(ipi), IP_RECVPKTINFO, IPPROTO_IP); |
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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_PKTINFO) { |
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struct in_pktinfo ipi; |
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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((void *) &ipi, |