src/sys/netinet/ip_input.c - diff

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Diff for /src/sys/netinet/ip_input.c between version 1.130.2.9 and 1.130.2.10

version 1.130.2.9, 2002/05/04 19:51:50

version 1.130.2.10, 2002/06/20 03:48:44

Line 3

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

Line 15

* 3. Neither the name of the project nor the names of its contributors

* may be used to endorse or promote products derived from this software

* without specific prior written permission.

* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

Line 168 __KERNEL_RCSID(0, "$NetBSD$");

#define IPALLOWSRCRT 1 /* allow source-routed packets */

#endif

#ifndef IPMTUDISC

#define IPMTUDISC 0

#define IPMTUDISC 1

#endif

#ifndef IPMTUDISCTIMEOUT

#define IPMTUDISCTIMEOUT (10 * 60) /* as per RFC 1191 */

Line 201 struct rttimer_queue *ip_mtudisc_timeout

extern struct domain inetdomain;

int ipqmaxlen = IFQ_MAXLEN;

u_long in_ifaddrhash; /* size of hash table - 1 */

int in_ifaddrentries; /* total number of addrs */

struct in_ifaddrhead in_ifaddr;

struct in_ifaddrhashhead *in_ifaddrhashtbl;

struct ifqueue ipintrq;

Line 225 ipq_lock_try()

Line 227 ipq_lock_try()

int s;

* Use splvm() -- we're bloking things that would cause

* Use splvm() -- we're blocking things that would cause

* mbuf allocation.

s = splvm();

Line 337 ip_init()

Line 339 ip_init()

in_ifaddrhashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IFADDR,

M_WAITOK, &in_ifaddrhash);

if (ip_mtudisc != 0)

ip_mtudisc_timeout_q =

rt_timer_queue_create(ip_mtudisc_timeout);

#ifdef GATEWAY

ipflow_init();

Line 509 ip_input(struct mbuf *m)

Line 511 ip_input(struct mbuf *m)

}

#ifdef IPSEC

/* ipflow (IP fast fowarding) is not compatible with IPsec. */

/* ipflow (IP fast forwarding) is not compatible with IPsec. */

m->m_flags &= ~M_CANFASTFWD;

#else

Line 858 ip_reass(ipqe, fp)

Line 860 ip_reass(ipqe, fp)

fp->ipq_ttl = IPFRAGTTL;

fp->ipq_p = ipqe->ipqe_ip->ip_p;

fp->ipq_id = ipqe->ipqe_ip->ip_id;

LIST_INIT(&fp->ipq_fragq);

TAILQ_INIT(&fp->ipq_fragq);

fp->ipq_src = ipqe->ipqe_ip->ip_src;

fp->ipq_dst = ipqe->ipqe_ip->ip_dst;

p = NULL;

Line 868 ip_reass(ipqe, fp)

Line 870 ip_reass(ipqe, fp)

* Find a segment which begins after this one does.

for (p = NULL, q = LIST_FIRST(&fp->ipq_fragq); q != NULL;

for (p = NULL, q = TAILQ_FIRST(&fp->ipq_fragq); q != NULL;

p = q, q = LIST_NEXT(q, ipqe_q))

p = q, q = TAILQ_NEXT(q, ipqe_q))

if (q->ipqe_ip->ip_off > ipqe->ipqe_ip->ip_off)

break;

Line 904 ip_reass(ipqe, fp)

Line 906 ip_reass(ipqe, fp)

m_adj(q->ipqe_m, i);

break;

}

nq = LIST_NEXT(q, ipqe_q);

nq = TAILQ_NEXT(q, ipqe_q);

m_freem(q->ipqe_m);

LIST_REMOVE(q, ipqe_q);

TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q);

pool_put(&ipqent_pool, q);

}

Line 916 insert:

Line 918 insert:

* check for complete reassembly.

if (p == NULL) {

LIST_INSERT_HEAD(&fp->ipq_fragq, ipqe, ipqe_q);

TAILQ_INSERT_HEAD(&fp->ipq_fragq, ipqe, ipqe_q);

} else {

LIST_INSERT_AFTER(p, ipqe, ipqe_q);

TAILQ_INSERT_AFTER(&fp->ipq_fragq, p, ipqe, ipqe_q);

}

next = 0;

for (p = NULL, q = LIST_FIRST(&fp->ipq_fragq); q != NULL;

for (p = NULL, q = TAILQ_FIRST(&fp->ipq_fragq); q != NULL;

p = q, q = LIST_NEXT(q, ipqe_q)) {

p = q, q = TAILQ_NEXT(q, ipqe_q)) {

if (q->ipqe_ip->ip_off != next)

return (0);

next += q->ipqe_ip->ip_len;

Line 934 insert:

Line 936 insert:

* Reassembly is complete. Check for a bogus message size and

* concatenate fragments.

q = LIST_FIRST(&fp->ipq_fragq);

q = TAILQ_FIRST(&fp->ipq_fragq);

ip = q->ipqe_ip;

if ((next + (ip->ip_hl << 2)) > IP_MAXPACKET) {

ipstat.ips_toolong++;

Line 945 insert:

Line 947 insert:

t = m->m_next;

m->m_next = 0;

m_cat(m, t);

nq = LIST_NEXT(q, ipqe_q);

nq = TAILQ_NEXT(q, ipqe_q);

pool_put(&ipqent_pool, q);

for (q = nq; q != NULL; q = nq) {

t = q->ipqe_m;

nq = LIST_NEXT(q, ipqe_q);

nq = TAILQ_NEXT(q, ipqe_q);

pool_put(&ipqent_pool, q);

m_cat(m, t);

}

Line 996 ip_freef(fp)

Line 998 ip_freef(fp)

IPQ_LOCK_CHECK();

for (q = LIST_FIRST(&fp->ipq_fragq); q != NULL; q = p) {

for (q = TAILQ_FIRST(&fp->ipq_fragq); q != NULL; q = p) {

p = LIST_NEXT(q, ipqe_q);

p = TAILQ_NEXT(q, ipqe_q);

m_freem(q->ipqe_m);

LIST_REMOVE(q, ipqe_q);

TAILQ_REMOVE(&fp->ipq_fragq, q, ipqe_q);

pool_put(&ipqent_pool, q);

}

LIST_REMOVE(fp, ipq_q);

Line 1660 ip_forward(m, srcrt)

Line 1662 ip_forward(m, srcrt)

ro = &sp->req->sav->sah->sa_route;

if (ro->ro_rt && ro->ro_rt->rt_ifp) {

dummyifp.if_mtu =

ro->ro_rt->rt_rmx.rmx_mtu ?

ro->ro_rt->rt_rmx.rmx_mtu :

ro->ro_rt->rt_ifp->if_mtu;

dummyifp.if_mtu -= ipsechdr;

destifp = &dummyifp;

Line 1679 ip_forward(m, srcrt)

Line 1683 ip_forward(m, srcrt)

* a router should not generate ICMP_SOURCEQUENCH as

* required in RFC1812 Requirements for IP Version 4 Routers.

* source quench could be a big problem under DoS attacks,

* or the underlying interface is rate-limited.

* or if the underlying interface is rate-limited.

if (mcopy)

m_freem(mcopy);

Line 1803 ip_sysctl(name, namelen, oldp, oldlenp,

Line 1807 ip_sysctl(name, namelen, oldp, oldlenp,

error = sysctl_int(oldp, oldlenp, newp, newlen,

&ip_mtudisc);

if (ip_mtudisc != 0 && ip_mtudisc_timeout_q == NULL) {

ip_mtudisc_timeout_q =

rt_timer_queue_create(ip_mtudisc_timeout);

} else if (ip_mtudisc == 0 && ip_mtudisc_timeout_q != NULL) {

rt_timer_queue_destroy(ip_mtudisc_timeout_q, TRUE);

Line 1840 ip_sysctl(name, namelen, oldp, oldlenp,

Line 1844 ip_sysctl(name, namelen, oldp, oldlenp,

error = sysctl_int(oldp, oldlenp, newp, newlen,

&ip_mtudisc_timeout);

if (ip_mtudisc_timeout_q != NULL)

rt_timer_queue_change(ip_mtudisc_timeout_q,

ip_mtudisc_timeout);

return (error);

#ifdef GATEWAY

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