version 1.21, 2000/05/19 20:09:27 |
version 1.25, 2000/07/06 12:36:19 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
/* $KAME: ip6_input.c,v 1.89 2000/05/19 19:59:05 itojun Exp $ */ |
/* $KAME: ip6_input.c,v 1.95 2000/07/02 07:49:37 jinmei Exp $ */ |
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/* |
/* |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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if (m->m_next) { |
if (m->m_next) { |
if (m->m_flags & M_LOOP) { |
if (m->m_flags & M_LOOP) { |
ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
} |
} else if (m->m_pkthdr.rcvif->if_index <= 31) |
else if (m->m_pkthdr.rcvif->if_index <= 31) |
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ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
else |
else |
ip6stat.ip6s_m2m[0]++; |
ip6stat.ip6s_m2m[0]++; |
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/* |
/* |
* Unicast check |
* Unicast check |
*/ |
*/ |
if (ip6_forward_rt.ro_rt == 0 || |
if (ip6_forward_rt.ro_rt != NULL && |
!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
(ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 && |
&ip6_forward_rt.ro_dst.sin6_addr)) { |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
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&ip6_forward_rt.ro_dst.sin6_addr)) |
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ip6stat.ip6s_forward_cachehit++; |
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else { |
if (ip6_forward_rt.ro_rt) { |
if (ip6_forward_rt.ro_rt) { |
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/* route is down or destination is different */ |
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ip6stat.ip6s_forward_cachemiss++; |
RTFREE(ip6_forward_rt.ro_rt); |
RTFREE(ip6_forward_rt.ro_rt); |
ip6_forward_rt.ro_rt = 0; |
ip6_forward_rt.ro_rt = 0; |
} |
} |
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bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); |
bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); |
ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); |
ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); |
ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
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ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { |
ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { |
struct in6_ifaddr *ia6 = |
struct in6_ifaddr *ia6 = |
(struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa; |
(struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa; |
/* packet to tentative address must not be received */ |
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if (ia6->ia6_flags & IN6_IFF_ANYCAST) |
if (ia6->ia6_flags & IN6_IFF_ANYCAST) |
m->m_flags |= M_ANYCAST6; |
m->m_flags |= M_ANYCAST6; |
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/* |
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* packets to a tentative, duplicated, or somehow invalid |
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* address must not be accepted. |
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*/ |
if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) { |
if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) { |
/* this interface is ready */ |
/* this address is ready */ |
ours = 1; |
ours = 1; |
deliverifp = ia6->ia_ifp; /* correct? */ |
deliverifp = ia6->ia_ifp; /* correct? */ |
goto hbhcheck; |
goto hbhcheck; |
} else { |
} else { |
/* this interface is not ready, fall through */ |
/* address is not ready, so discard the packet. */ |
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log(LOG_INFO, |
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"ip6_input: packet to an unready address %s->%s", |
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ip6_sprintf(&ip6->ip6_src), |
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ip6_sprintf(&ip6->ip6_dst)); |
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goto bad; |
} |
} |
} |
} |
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#endif |
#endif |
return; /* m have already been freed */ |
return; /* m have already been freed */ |
} |
} |
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/* adjust pointer */ |
/* adjust pointer */ |
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
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/* |
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* if the payload length field is 0 and the next header field |
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* indicates Hop-by-Hop Options header, then a Jumbo Payload |
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* option MUST be included. |
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*/ |
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if (ip6->ip6_plen == 0 && plen == 0) { |
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/* |
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* Note that if a valid jumbo payload option is |
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* contained, ip6_hoptops_input() must set a valid |
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* (non-zero) payload length to the variable plen. |
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*/ |
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ip6stat.ip6s_badoptions++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
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icmp6_error(m, ICMP6_PARAM_PROB, |
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ICMP6_PARAMPROB_HEADER, |
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(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
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return; |
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} |
#ifndef PULLDOWN_TEST |
#ifndef PULLDOWN_TEST |
/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
hbh = (struct ip6_hbh *)(ip6 + 1); |
hbh = (struct ip6_hbh *)(ip6 + 1); |
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m_freem(m); |
m_freem(m); |
return; |
return; |
} |
} |
} |
} else if (!ours) { |
else if (!ours) { |
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ip6_forward(m, 0); |
ip6_forward(m, 0); |
return; |
return; |
} |
} |
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ip6 = mtod(m, struct ip6_hdr *); |
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/* |
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* Malicious party may be able to use IPv4 mapped addr to confuse |
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* tcp/udp stack and bypass security checks (act as if it was from |
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* 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious. |
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* |
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* For SIIT end node behavior, you may want to disable the check. |
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* However, you will become vulnerable to attacks using IPv4 mapped |
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* source. |
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*/ |
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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
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ip6stat.ip6s_badscope++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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goto bad; |
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} |
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/* |
/* |
* Tell launch routine the next header |
* Tell launch routine the next header |
*/ |
*/ |
#ifdef IFA_STATS |
#ifdef IFA_STATS |
if (IFA_STATS && deliverifp != NULL) { |
if (IFA_STATS && deliverifp != NULL) { |
struct in6_ifaddr *ia6; |
struct in6_ifaddr *ia6; |
ip6 = mtod(m, struct ip6_hdr *); |
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ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
if (ia6) |
if (ia6) |
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
Line 740 ip6_process_hopopts(m, opthead, hbhlen, |
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Line 791 ip6_process_hopopts(m, opthead, hbhlen, |
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int optlen = 0; |
int optlen = 0; |
u_int8_t *opt = opthead; |
u_int8_t *opt = opthead; |
u_int16_t rtalert_val; |
u_int16_t rtalert_val; |
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u_int32_t jumboplen; |
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for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { |
for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { |
switch(*opt) { |
switch(*opt) { |
Line 768 ip6_process_hopopts(m, opthead, hbhlen, |
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Line 820 ip6_process_hopopts(m, opthead, hbhlen, |
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*rtalertp = ntohs(rtalert_val); |
*rtalertp = ntohs(rtalert_val); |
break; |
break; |
case IP6OPT_JUMBO: |
case IP6OPT_JUMBO: |
/* XXX may need check for alignment */ |
/* XXX may need check for alignment */ |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
goto bad; |
goto bad; |
} |
} |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
/* XXX: should we discard the packet? */ |
/* XXX: should we discard the packet? */ |
log(LOG_ERR, "length of jumbopayload opt " |
log(LOG_ERR, "length of jumbopayload opt " |
"is inconsistent(%d)", |
"is inconsistent(%d)", |
*(opt + 1)); |
*(opt + 1)); |
optlen = IP6OPT_JUMBO_LEN; |
optlen = IP6OPT_JUMBO_LEN; |
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/* |
/* |
* We can simply cast because of the alignment |
* IPv6 packets that have non 0 payload length |
* requirement of the jumbo payload option. |
* must not contain a jumbo paylod option. |
*/ |
*/ |
#if 0 |
ip6 = mtod(m, struct ip6_hdr *); |
*plenp = ntohl(*(u_int32_t *)(opt + 2)); |
if (ip6->ip6_plen) { |
#else |
ip6stat.ip6s_badoptions++; |
bcopy(opt + 2, plenp, sizeof(*plenp)); |
icmp6_error(m, ICMP6_PARAM_PROB, |
*plenp = htonl(*plenp); |
ICMP6_PARAMPROB_HEADER, |
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sizeof(struct ip6_hdr) + |
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sizeof(struct ip6_hbh) + |
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opt - opthead); |
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return(-1); |
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} |
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/* |
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* We may see jumbolen in unaligned location, so |
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* we'd need to perform bcopy(). |
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*/ |
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bcopy(opt + 2, &jumboplen, sizeof(jumboplen)); |
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jumboplen = (u_int32_t)htonl(jumboplen); |
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#if 1 |
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/* |
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* if there are multiple jumbo payload options, |
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* *plenp will be non-zero and the packet will be |
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* rejected. |
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* the behavior may need some debate in ipngwg - |
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* multiple options does not make sense, however, |
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* there's no explicit mention in specification. |
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*/ |
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if (*plenp != 0) { |
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ip6stat.ip6s_badoptions++; |
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icmp6_error(m, ICMP6_PARAM_PROB, |
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ICMP6_PARAMPROB_HEADER, |
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sizeof(struct ip6_hdr) + |
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sizeof(struct ip6_hbh) + |
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opt + 2 - opthead); |
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return(-1); |
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} |
#endif |
#endif |
if (*plenp <= IPV6_MAXPACKET) { |
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/* |
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* jumbo payload length must be larger |
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* than 65535 |
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*/ |
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ip6stat.ip6s_badoptions++; |
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icmp6_error(m, ICMP6_PARAM_PROB, |
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ICMP6_PARAMPROB_HEADER, |
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sizeof(struct ip6_hdr) + |
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sizeof(struct ip6_hbh) + |
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opt + 2 - opthead); |
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return(-1); |
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} |
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ip6 = mtod(m, struct ip6_hdr *); |
/* |
if (ip6->ip6_plen) { |
* jumbo payload length must be larger than 65535. |
/* |
*/ |
* IPv6 packets that have non 0 payload length |
if (jumboplen <= IPV6_MAXPACKET) { |
* must not contain a jumbo paylod option. |
ip6stat.ip6s_badoptions++; |
*/ |
icmp6_error(m, ICMP6_PARAM_PROB, |
ip6stat.ip6s_badoptions++; |
ICMP6_PARAMPROB_HEADER, |
icmp6_error(m, ICMP6_PARAM_PROB, |
sizeof(struct ip6_hdr) + |
ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hbh) + |
sizeof(struct ip6_hdr) + |
opt + 2 - opthead); |
sizeof(struct ip6_hbh) + |
return(-1); |
opt - opthead); |
} |
return(-1); |
*plenp = jumboplen; |
} |
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break; |
break; |
default: /* unknown option */ |
default: /* unknown option */ |
if (hbhlen < IP6OPT_MINLEN) { |
if (hbhlen < IP6OPT_MINLEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
Line 1283 u_char inet6ctlerrmap[PRC_NCMDS] = { |
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Line 1353 u_char inet6ctlerrmap[PRC_NCMDS] = { |
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ENOPROTOOPT |
ENOPROTOOPT |
}; |
}; |
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#include <vm/vm.h> |
#include <uvm/uvm_extern.h> |
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
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int |
int |