version 1.46, 1997/02/19 08:30:04 |
version 1.53.2.1, 1998/05/09 03:33:00 |
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#define IPSENDREDIRECTS 1 |
#define IPSENDREDIRECTS 1 |
#endif |
#endif |
#ifndef IPFORWSRCRT |
#ifndef IPFORWSRCRT |
#define IPFORWSRCRT 1 /* allow source-routed packets */ |
#define IPFORWSRCRT 1 /* forward source-routed packets */ |
#endif |
#endif |
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#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 0 |
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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 |
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/* |
/* |
* Note: DIRECTED_BROADCAST is handled this way so that previous |
* Note: DIRECTED_BROADCAST is handled this way so that previous |
* configuration using this option will Just Work. |
* configuration using this option will Just Work. |
Line 96 int ipsendredirects = IPSENDREDIRECTS; |
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Line 107 int ipsendredirects = IPSENDREDIRECTS; |
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int ip_defttl = IPDEFTTL; |
int ip_defttl = IPDEFTTL; |
int ip_forwsrcrt = IPFORWSRCRT; |
int ip_forwsrcrt = IPFORWSRCRT; |
int ip_directedbcast = IPDIRECTEDBCAST; |
int ip_directedbcast = IPDIRECTEDBCAST; |
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int ip_allowsrcrt = IPALLOWSRCRT; |
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int ip_mtudisc = IPMTUDISC; |
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u_int ip_mtudisc_timeout = IPMTUDISCTIMEOUT; |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
int ipprintfs = 0; |
int ipprintfs = 0; |
#endif |
#endif |
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struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
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extern struct domain inetdomain; |
extern struct domain inetdomain; |
extern struct protosw inetsw[]; |
extern struct protosw inetsw[]; |
u_char ip_protox[IPPROTO_MAX]; |
u_char ip_protox[IPPROTO_MAX]; |
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ip_id = time.tv_sec & 0xffff; |
ip_id = time.tv_sec & 0xffff; |
ipintrq.ifq_maxlen = ipqmaxlen; |
ipintrq.ifq_maxlen = ipqmaxlen; |
TAILQ_INIT(&in_ifaddr); |
TAILQ_INIT(&in_ifaddr); |
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if (ip_mtudisc != 0) |
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ip_mtudisc_timeout_q = |
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rt_timer_queue_create(ip_mtudisc_timeout); |
} |
} |
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struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; |
struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; |
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for (pfh = pfil_hook_get(PFIL_IN); pfh; pfh = pfh->pfil_link.le_next) |
for (pfh = pfil_hook_get(PFIL_IN); pfh; pfh = pfh->pfil_link.le_next) |
if (pfh->pfil_func) { |
if (pfh->pfil_func) { |
rv = pfh->pfil_func(ip, hlen, m->m_pkthdr.rcvif, 0, &m0); |
rv = pfh->pfil_func(ip, hlen, m->m_pkthdr.rcvif, 0, &m0); |
ip = mtod(m = m0, struct ip *); |
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if (rv) |
if (rv) |
goto next; |
goto next; |
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ip = mtod(m = m0, struct ip *); |
} |
} |
#endif /* PFIL_HOOKS */ |
#endif /* PFIL_HOOKS */ |
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ip->ip_dst.s_addr == ia->ia_net) |
ip->ip_dst.s_addr == ia->ia_net) |
goto ours; |
goto ours; |
} |
} |
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/* |
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* An interface with IP address zero accepts |
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* all packets that arrive on that interface. |
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*/ |
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if ((ia->ia_ifp == m->m_pkthdr.rcvif) && |
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in_nullhost(ia->ia_addr.sin_addr)) |
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goto ours; |
} |
} |
if (IN_MULTICAST(ip->ip_dst.s_addr)) { |
if (IN_MULTICAST(ip->ip_dst.s_addr)) { |
struct in_multi *inm; |
struct in_multi *inm; |
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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 & ~(IP_DF|IP_RF)) { |
if (ip->ip_off & ~(IP_DF|IP_RF)) { |
if (m->m_flags & M_EXT) { /* XXX */ |
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if ((m = m_pullup(m, sizeof (struct ip))) == 0) { |
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ipstat.ips_toosmall++; |
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goto next; |
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} |
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ip = mtod(m, struct ip *); |
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} |
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/* |
/* |
* Look for queue of fragments |
* Look for queue of fragments |
* of this datagram. |
* of this datagram. |
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goto bad; |
goto bad; |
} |
} |
ipqe->ipqe_mff = mff; |
ipqe->ipqe_mff = mff; |
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ipqe->ipqe_m = m; |
ipqe->ipqe_ip = ip; |
ipqe->ipqe_ip = ip; |
ip = ip_reass(ipqe, fp); |
m = ip_reass(ipqe, fp); |
if (ip == 0) |
if (m == 0) |
goto next; |
goto next; |
ipstat.ips_reassembled++; |
ipstat.ips_reassembled++; |
m = dtom(ip); |
ip = mtod(m, struct ip *); |
} else |
} else |
if (fp) |
if (fp) |
ip_freef(fp); |
ip_freef(fp); |
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* reassembly of this datagram already exists, then it |
* reassembly of this datagram already exists, then it |
* is given as fp; otherwise have to make a chain. |
* is given as fp; otherwise have to make a chain. |
*/ |
*/ |
struct ip * |
struct mbuf * |
ip_reass(ipqe, fp) |
ip_reass(ipqe, fp) |
register struct ipqent *ipqe; |
register struct ipqent *ipqe; |
register struct ipq *fp; |
register struct ipq *fp; |
{ |
{ |
register struct mbuf *m = dtom(ipqe->ipqe_ip); |
register struct mbuf *m = ipqe->ipqe_m; |
register struct ipqent *nq, *p, *q; |
register struct ipqent *nq, *p, *q; |
struct ip *ip; |
struct ip *ip; |
struct mbuf *t; |
struct mbuf *t; |
Line 474 ip_reass(ipqe, fp) |
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Line 495 ip_reass(ipqe, fp) |
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* If first fragment to arrive, create a reassembly queue. |
* If first fragment to arrive, create a reassembly queue. |
*/ |
*/ |
if (fp == 0) { |
if (fp == 0) { |
if ((t = m_get(M_DONTWAIT, MT_FTABLE)) == NULL) |
MALLOC(fp, struct ipq *, sizeof (struct ipq), |
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M_FTABLE, M_NOWAIT); |
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if (fp == NULL) |
goto dropfrag; |
goto dropfrag; |
fp = mtod(t, struct ipq *); |
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LIST_INSERT_HEAD(&ipq, fp, ipq_q); |
LIST_INSERT_HEAD(&ipq, fp, ipq_q); |
fp->ipq_ttl = IPFRAGTTL; |
fp->ipq_ttl = IPFRAGTTL; |
fp->ipq_p = ipqe->ipqe_ip->ip_p; |
fp->ipq_p = ipqe->ipqe_ip->ip_p; |
Line 507 ip_reass(ipqe, fp) |
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Line 529 ip_reass(ipqe, fp) |
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if (i > 0) { |
if (i > 0) { |
if (i >= ipqe->ipqe_ip->ip_len) |
if (i >= ipqe->ipqe_ip->ip_len) |
goto dropfrag; |
goto dropfrag; |
m_adj(dtom(ipqe->ipqe_ip), i); |
m_adj(ipqe->ipqe_m, i); |
ipqe->ipqe_ip->ip_off += i; |
ipqe->ipqe_ip->ip_off += i; |
ipqe->ipqe_ip->ip_len -= i; |
ipqe->ipqe_ip->ip_len -= i; |
} |
} |
Line 524 ip_reass(ipqe, fp) |
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Line 546 ip_reass(ipqe, fp) |
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if (i < q->ipqe_ip->ip_len) { |
if (i < q->ipqe_ip->ip_len) { |
q->ipqe_ip->ip_len -= i; |
q->ipqe_ip->ip_len -= i; |
q->ipqe_ip->ip_off += i; |
q->ipqe_ip->ip_off += i; |
m_adj(dtom(q->ipqe_ip), i); |
m_adj(q->ipqe_m, i); |
break; |
break; |
} |
} |
nq = q->ipqe_q.le_next; |
nq = q->ipqe_q.le_next; |
m_freem(dtom(q->ipqe_ip)); |
m_freem(q->ipqe_m); |
LIST_REMOVE(q, ipqe_q); |
LIST_REMOVE(q, ipqe_q); |
FREE(q, M_IPQ); |
FREE(q, M_IPQ); |
} |
} |
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ip_freef(fp); |
ip_freef(fp); |
return (0); |
return (0); |
} |
} |
m = dtom(q->ipqe_ip); |
m = q->ipqe_m; |
t = m->m_next; |
t = m->m_next; |
m->m_next = 0; |
m->m_next = 0; |
m_cat(m, t); |
m_cat(m, t); |
nq = q->ipqe_q.le_next; |
nq = q->ipqe_q.le_next; |
FREE(q, M_IPQ); |
FREE(q, M_IPQ); |
for (q = nq; q != NULL; q = nq) { |
for (q = nq; q != NULL; q = nq) { |
t = dtom(q->ipqe_ip); |
t = q->ipqe_m; |
nq = q->ipqe_q.le_next; |
nq = q->ipqe_q.le_next; |
FREE(q, M_IPQ); |
FREE(q, M_IPQ); |
m_cat(m, t); |
m_cat(m, t); |
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ip->ip_src = fp->ipq_src; |
ip->ip_src = fp->ipq_src; |
ip->ip_dst = fp->ipq_dst; |
ip->ip_dst = fp->ipq_dst; |
LIST_REMOVE(fp, ipq_q); |
LIST_REMOVE(fp, ipq_q); |
(void) m_free(dtom(fp)); |
FREE(fp, M_FTABLE); |
m->m_len += (ip->ip_hl << 2); |
m->m_len += (ip->ip_hl << 2); |
m->m_data -= (ip->ip_hl << 2); |
m->m_data -= (ip->ip_hl << 2); |
/* some debugging cruft by sklower, below, will go away soon */ |
/* some debugging cruft by sklower, below, will go away soon */ |
if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */ |
if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */ |
register int plen = 0; |
register int plen = 0; |
for (t = m; m; m = m->m_next) |
for (t = m; t; t = t->m_next) |
plen += m->m_len; |
plen += t->m_len; |
t->m_pkthdr.len = plen; |
m->m_pkthdr.len = plen; |
} |
} |
return (ip); |
return (m); |
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dropfrag: |
dropfrag: |
ipstat.ips_fragdropped++; |
ipstat.ips_fragdropped++; |
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for (q = fp->ipq_fragq.lh_first; q != NULL; q = p) { |
for (q = fp->ipq_fragq.lh_first; q != NULL; q = p) { |
p = q->ipqe_q.le_next; |
p = q->ipqe_q.le_next; |
m_freem(dtom(q->ipqe_ip)); |
m_freem(q->ipqe_m); |
LIST_REMOVE(q, ipqe_q); |
LIST_REMOVE(q, ipqe_q); |
FREE(q, M_IPQ); |
FREE(q, M_IPQ); |
} |
} |
LIST_REMOVE(fp, ipq_q); |
LIST_REMOVE(fp, ipq_q); |
(void) m_free(dtom(fp)); |
FREE(fp, M_FTABLE); |
} |
} |
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/* |
/* |
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*/ |
*/ |
case IPOPT_LSRR: |
case IPOPT_LSRR: |
case IPOPT_SSRR: |
case IPOPT_SSRR: |
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if (ip_allowsrcrt == 0) { |
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type = ICMP_UNREACH; |
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code = ICMP_UNREACH_NET_PROHIB; |
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goto bad; |
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} |
if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { |
if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) { |
code = &cp[IPOPT_OFFSET] - (u_char *)ip; |
code = &cp[IPOPT_OFFSET] - (u_char *)ip; |
goto bad; |
goto bad; |
Line 1231 ip_sysctl(name, namelen, oldp, oldlenp, |
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Line 1258 ip_sysctl(name, namelen, oldp, oldlenp, |
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void *newp; |
void *newp; |
size_t newlen; |
size_t newlen; |
{ |
{ |
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extern int subnetsarelocal; |
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int error; |
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/* All sysctl names at this level are terminal. */ |
/* All sysctl names at this level are terminal. */ |
if (namelen != 1) |
if (namelen != 1) |
return (ENOTDIR); |
return (ENOTDIR); |
Line 1248 ip_sysctl(name, namelen, oldp, oldlenp, |
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Line 1278 ip_sysctl(name, namelen, oldp, oldlenp, |
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return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu)); |
return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu)); |
#endif |
#endif |
case IPCTL_FORWSRCRT: |
case IPCTL_FORWSRCRT: |
/* |
/* Don't allow this to change in a secure environment. */ |
* Don't allow this to change in a secure environment. |
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*/ |
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if (securelevel > 0) |
if (securelevel > 0) |
return (sysctl_rdint(oldp, oldlenp, newp, |
return (sysctl_rdint(oldp, oldlenp, newp, |
ip_forwsrcrt)); |
ip_forwsrcrt)); |
Line 1260 ip_sysctl(name, namelen, oldp, oldlenp, |
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Line 1288 ip_sysctl(name, namelen, oldp, oldlenp, |
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case IPCTL_DIRECTEDBCAST: |
case IPCTL_DIRECTEDBCAST: |
return (sysctl_int(oldp, oldlenp, newp, newlen, |
return (sysctl_int(oldp, oldlenp, newp, newlen, |
&ip_directedbcast)); |
&ip_directedbcast)); |
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case IPCTL_ALLOWSRCRT: |
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return (sysctl_int(oldp, oldlenp, newp, newlen, |
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&ip_allowsrcrt)); |
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case IPCTL_SUBNETSARELOCAL: |
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return (sysctl_int(oldp, oldlenp, newp, newlen, |
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&subnetsarelocal)); |
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case IPCTL_MTUDISC: |
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error = sysctl_int(oldp, oldlenp, newp, newlen, |
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&ip_mtudisc); |
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if (ip_mtudisc != 0 && ip_mtudisc_timeout_q == NULL) { |
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ip_mtudisc_timeout_q = |
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rt_timer_queue_create(ip_mtudisc_timeout); |
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} else if (ip_mtudisc == 0 && ip_mtudisc_timeout_q != NULL) { |
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rt_timer_queue_destroy(ip_mtudisc_timeout_q, TRUE); |
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ip_mtudisc_timeout_q = NULL; |
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} |
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return error; |
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case IPCTL_MTUDISCTIMEOUT: |
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error = sysctl_int(oldp, oldlenp, newp, newlen, |
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&ip_mtudisc_timeout); |
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if (ip_mtudisc_timeout_q != NULL) |
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rt_timer_queue_change(ip_mtudisc_timeout_q, |
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ip_mtudisc_timeout); |
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return (error); |
default: |
default: |
return (EOPNOTSUPP); |
return (EOPNOTSUPP); |
} |
} |