version 1.69, 1998/08/09 08:58:19 |
version 1.77, 1999/01/11 22:35:06 |
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#include <sys/time.h> |
#include <sys/time.h> |
#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
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#include <sys/pool.h> |
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#include <vm/vm.h> |
#include <vm/vm.h> |
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
Line 163 struct ifqueue ipintrq; |
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Line 164 struct ifqueue ipintrq; |
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struct ipstat ipstat; |
struct ipstat ipstat; |
u_int16_t ip_id; |
u_int16_t ip_id; |
int ip_defttl; |
int ip_defttl; |
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struct ipqhead ipq; |
struct ipqhead ipq; |
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int ipq_locked; |
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static __inline int ipq_lock_try __P((void)); |
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static __inline void ipq_unlock __P((void)); |
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static __inline int |
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ipq_lock_try() |
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{ |
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int s; |
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s = splimp(); |
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if (ipq_locked) { |
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splx(s); |
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return (0); |
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} |
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ipq_locked = 1; |
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splx(s); |
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return (1); |
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} |
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static __inline void |
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ipq_unlock() |
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{ |
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int s; |
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s = splimp(); |
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ipq_locked = 0; |
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splx(s); |
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} |
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#ifdef DIAGNOSTIC |
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#define IPQ_LOCK() \ |
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do { \ |
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if (ipq_lock_try() == 0) { \ |
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printf("%s:%d: ipq already locked\n", __FILE__, __LINE__); \ |
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panic("ipq_lock"); \ |
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} \ |
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} while (0) |
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#define IPQ_LOCK_CHECK() \ |
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do { \ |
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if (ipq_locked == 0) { \ |
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printf("%s:%d: ipq lock not held\n", __FILE__, __LINE__); \ |
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panic("ipq lock check"); \ |
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} \ |
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} while (0) |
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#else |
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#define IPQ_LOCK() (void) ipq_lock_try() |
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#define IPQ_LOCK_CHECK() /* nothing */ |
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#endif |
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#define IPQ_UNLOCK() ipq_unlock() |
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struct pool ipqent_pool; |
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/* |
/* |
* We need to save the IP options in case a protocol wants to respond |
* We need to save the IP options in case a protocol wants to respond |
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register struct protosw *pr; |
register struct protosw *pr; |
register int i; |
register int i; |
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pool_init(&ipqent_pool, sizeof(struct ipqent), 0, 0, 0, "ipqepl", |
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0, NULL, NULL, M_IPQ); |
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pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
if (pr == 0) |
if (pr == 0) |
panic("ip_init"); |
panic("ip_init"); |
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if (ip_mtudisc != 0) |
if (ip_mtudisc != 0) |
ip_mtudisc_timeout_q = |
ip_mtudisc_timeout_q = |
rt_timer_queue_create(ip_mtudisc_timeout); |
rt_timer_queue_create(ip_mtudisc_timeout); |
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#ifdef GATEWAY |
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ipflow_init(); |
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#endif |
} |
} |
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struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; |
struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET }; |
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* Look for queue of fragments |
* Look for queue of fragments |
* of this datagram. |
* of this datagram. |
*/ |
*/ |
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IPQ_LOCK(); |
for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next) |
for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next) |
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) && |
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*/ |
*/ |
if (ip->ip_len == 0 || (ip->ip_len & 0x7) != 0) { |
if (ip->ip_len == 0 || (ip->ip_len & 0x7) != 0) { |
ipstat.ips_badfrags++; |
ipstat.ips_badfrags++; |
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IPQ_UNLOCK(); |
goto bad; |
goto bad; |
} |
} |
} |
} |
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*/ |
*/ |
if (mff || ip->ip_off) { |
if (mff || ip->ip_off) { |
ipstat.ips_fragments++; |
ipstat.ips_fragments++; |
MALLOC(ipqe, struct ipqent *, sizeof (struct ipqent), |
ipqe = pool_get(&ipqent_pool, PR_NOWAIT); |
M_IPQ, M_NOWAIT); |
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if (ipqe == NULL) { |
if (ipqe == NULL) { |
ipstat.ips_rcvmemdrop++; |
ipstat.ips_rcvmemdrop++; |
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IPQ_UNLOCK(); |
goto bad; |
goto bad; |
} |
} |
ipqe->ipqe_mff = mff; |
ipqe->ipqe_mff = mff; |
ipqe->ipqe_m = m; |
ipqe->ipqe_m = m; |
ipqe->ipqe_ip = ip; |
ipqe->ipqe_ip = ip; |
m = ip_reass(ipqe, fp); |
m = ip_reass(ipqe, fp); |
if (m == 0) |
if (m == 0) { |
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IPQ_UNLOCK(); |
goto next; |
goto next; |
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} |
ipstat.ips_reassembled++; |
ipstat.ips_reassembled++; |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
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hlen = ip->ip_hl << 2; |
} else |
} else |
if (fp) |
if (fp) |
ip_freef(fp); |
ip_freef(fp); |
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IPQ_UNLOCK(); |
} else |
} else |
ip->ip_len -= hlen; |
ip->ip_len -= hlen; |
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Line 541 ip_reass(ipqe, fp) |
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Line 608 ip_reass(ipqe, fp) |
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int hlen = ipqe->ipqe_ip->ip_hl << 2; |
int hlen = ipqe->ipqe_ip->ip_hl << 2; |
int i, next; |
int i, next; |
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IPQ_LOCK_CHECK(); |
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/* |
/* |
* Presence of header sizes in mbufs |
* Presence of header sizes in mbufs |
* would confuse code below. |
* would confuse code below. |
Line 609 ip_reass(ipqe, fp) |
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Line 678 ip_reass(ipqe, fp) |
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nq = q->ipqe_q.le_next; |
nq = q->ipqe_q.le_next; |
m_freem(q->ipqe_m); |
m_freem(q->ipqe_m); |
LIST_REMOVE(q, ipqe_q); |
LIST_REMOVE(q, ipqe_q); |
FREE(q, M_IPQ); |
pool_put(&ipqent_pool, q); |
} |
} |
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insert: |
insert: |
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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); |
pool_put(&ipqent_pool, q); |
for (q = nq; q != NULL; q = nq) { |
for (q = nq; q != NULL; q = nq) { |
t = q->ipqe_m; |
t = q->ipqe_m; |
nq = q->ipqe_q.le_next; |
nq = q->ipqe_q.le_next; |
FREE(q, M_IPQ); |
pool_put(&ipqent_pool, q); |
m_cat(m, t); |
m_cat(m, t); |
} |
} |
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dropfrag: |
dropfrag: |
ipstat.ips_fragdropped++; |
ipstat.ips_fragdropped++; |
m_freem(m); |
m_freem(m); |
FREE(ipqe, M_IPQ); |
pool_put(&ipqent_pool, ipqe); |
return (0); |
return (0); |
} |
} |
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{ |
{ |
register struct ipqent *q, *p; |
register struct ipqent *q, *p; |
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IPQ_LOCK_CHECK(); |
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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(q->ipqe_m); |
m_freem(q->ipqe_m); |
LIST_REMOVE(q, ipqe_q); |
LIST_REMOVE(q, ipqe_q); |
FREE(q, M_IPQ); |
pool_put(&ipqent_pool, q); |
} |
} |
LIST_REMOVE(fp, ipq_q); |
LIST_REMOVE(fp, ipq_q); |
FREE(fp, M_FTABLE); |
FREE(fp, M_FTABLE); |
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register struct ipq *fp, *nfp; |
register struct ipq *fp, *nfp; |
int s = splsoftnet(); |
int s = splsoftnet(); |
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IPQ_LOCK(); |
for (fp = ipq.lh_first; fp != NULL; fp = nfp) { |
for (fp = ipq.lh_first; fp != NULL; fp = nfp) { |
nfp = fp->ipq_q.le_next; |
nfp = fp->ipq_q.le_next; |
if (--fp->ipq_ttl == 0) { |
if (--fp->ipq_ttl == 0) { |
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ip_freef(fp); |
ip_freef(fp); |
} |
} |
} |
} |
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IPQ_UNLOCK(); |
#ifdef GATEWAY |
#ifdef GATEWAY |
ipflow_slowtimo(); |
ipflow_slowtimo(); |
#endif |
#endif |
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ip_drain() |
ip_drain() |
{ |
{ |
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/* |
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* We may be called from a device's interrupt context. If |
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* the ipq is already busy, just bail out now. |
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*/ |
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if (ipq_lock_try() == 0) |
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return; |
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while (ipq.lh_first != NULL) { |
while (ipq.lh_first != NULL) { |
ipstat.ips_fragdropped++; |
ipstat.ips_fragdropped++; |
ip_freef(ipq.lh_first); |
ip_freef(ipq.lh_first); |
} |
} |
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IPQ_UNLOCK(); |
} |
} |
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/* |
/* |
Line 1131 ip_forward(m, srcrt) |
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Line 1213 ip_forward(m, srcrt) |
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dest = 0; |
dest = 0; |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (ipprintfs) |
if (ipprintfs) |
printf("forward: src %x dst %x ttl %x\n", |
printf("forward: src %2.2x dst %2.2x ttl %x\n", |
ip->ip_src.s_addr, ip->ip_dst.s_addr, ip->ip_ttl); |
ntohl(ip->ip_src.s_addr), |
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ntohl(ip->ip_dst.s_addr), ip->ip_ttl); |
#endif |
#endif |
if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) { |
if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) { |
ipstat.ips_cantforward++; |
ipstat.ips_cantforward++; |
m_freem(m); |
m_freem(m); |
return; |
return; |
} |
} |
HTONS(ip->ip_id); |
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if (ip->ip_ttl <= IPTTLDEC) { |
if (ip->ip_ttl <= IPTTLDEC) { |
icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0); |
icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0); |
return; |
return; |
Line 1186 ip_forward(m, srcrt) |
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Line 1268 ip_forward(m, srcrt) |
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if (rt->rt_ifa && |
if (rt->rt_ifa && |
(ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) == |
(ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) == |
ifatoia(rt->rt_ifa)->ia_subnet) { |
ifatoia(rt->rt_ifa)->ia_subnet) { |
if (rt->rt_flags & RTF_GATEWAY) |
if (rt->rt_flags & RTF_GATEWAY) |
dest = satosin(rt->rt_gateway)->sin_addr.s_addr; |
dest = satosin(rt->rt_gateway)->sin_addr.s_addr; |
else |
else |
dest = ip->ip_dst.s_addr; |
dest = ip->ip_dst.s_addr; |
/* Router requirements says to only send host redirects */ |
/* |
type = ICMP_REDIRECT; |
* Router requirements says to only send host |
code = ICMP_REDIRECT_HOST; |
* redirects. |
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*/ |
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type = ICMP_REDIRECT; |
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code = ICMP_REDIRECT_HOST; |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (ipprintfs) |
if (ipprintfs) |
printf("redirect (%d) to %x\n", code, (u_int32_t)dest); |
printf("redirect (%d) to %x\n", code, |
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(u_int32_t)dest); |
#endif |
#endif |
} |
} |
} |
} |