src/sys/netinet6/ip6_input.c - diff

Return to ip6_input.c CVS log

Up to [cvs.NetBSD.org] / src / sys / netinet6

Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.

Diff for /src/sys/netinet6/ip6_input.c between version 1.78 and 1.78.2.1

version 1.78, 2005/05/29 21:43:51

version 1.78.2.1, 2006/06/21 15:11:08

Line 65

__KERNEL_RCSID(0, "$NetBSD$");

#include "opt_inet.h"

#include "opt_inet6.h"

#include "opt_ipsec.h"

#include "opt_pfil_hooks.h"

Line 103 __KERNEL_RCSID(0, "$NetBSD$");

Line 104 __KERNEL_RCSID(0, "$NetBSD$");

#include <netinet6/ip6_var.h>

#include <netinet6/in6_pcb.h>

#include <netinet/icmp6.h>

#include <netinet6/scope6_var.h>

#include <netinet6/in6_ifattach.h>

#include <netinet6/nd6.h>

Line 128 static int ip6qmaxlen = IFQ_MAXLEN;

Line 130 static int ip6qmaxlen = IFQ_MAXLEN;

struct in6_ifaddr *in6_ifaddr;

struct ifqueue ip6intrq;

extern struct callout in6_tmpaddrtimer_ch;

int ip6_forward_srcrt; /* XXX */

int ip6_sourcecheck; /* XXX */

int ip6_sourcecheck_interval; /* XXX */

Line 139 struct pfil_head inet6_pfil_hook;

Line 143 struct pfil_head inet6_pfil_hook;

struct ip6stat ip6stat;

static void ip6_init2 __P((void *));

static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));

static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));

static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));

Line 164 ip6_init()

Line 169 ip6_init()

pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)

ip6_protox[pr->pr_protocol] = pr - inet6sw;

ip6intrq.ifq_maxlen = ip6qmaxlen;

scope6_init();

addrsel_policy_init();

nd6_init();

frag6_init();

ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;

ip6_init2((void *)0);

Line 188 ip6_init2(dummy)

Line 196 ip6_init2(dummy)

/* nd6_timer_init */

callout_init(&nd6_timer_ch);

callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);

/* timer for regeneranation of temporary addresses randomize ID */

callout_init(&in6_tmpaddrtimer_ch);

callout_reset(&in6_tmpaddrtimer_ch,

(ip6_temp_preferred_lifetime - ip6_desync_factor -

ip6_temp_regen_advance) * hz,

in6_tmpaddrtimer, NULL);

}

Line 205 ip6intr()

Line 220 ip6intr()

splx(s);

if (m == 0)

return;

/* drop the packet if IPv6 operation is disabled on the IF */

if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {

m_freem(m);

return;

}

ip6_input(m);

}

Line 233 ip6_input(m)

Line 253 ip6_input(m)

#endif

* make sure we don't have onion peering information into m_tag.

ip6_delaux(m);

* mbuf statistics

if (m->m_flags & M_EXT) {

Line 260 ip6_input(m)

Line 285 ip6_input(m)

* If the IPv6 header is not aligned, slurp it up into a new

* mbuf with space for link headers, in the event we forward

* it. OTherwise, if it is aligned, make sure the entire base

* it. Otherwise, if it is aligned, make sure the entire base

* IPv6 header is in the first mbuf of the chain.

if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {

Line 375 ip6_input(m)

Line 400 ip6_input(m)

}

#endif

if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) ||

IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) {

* Disambiguate address scope zones (if there is ambiguity).

if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {

* We first make sure that the original source or destination address

ours = 1;

* is not in our internal form for scoped addresses. Such addresses

deliverifp = m->m_pkthdr.rcvif;

* are not necessarily invalid spec-wise, but we cannot accept them due

goto hbhcheck;

* to the usage conflict.

} else {

* in6_setscope() then also checks and rejects the cases where src or

ip6stat.ip6s_badscope++;

* dst are the loopback address and the receiving interface

in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);

* is not loopback.

goto bad;

}

if (__predict_false(

}

m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))

goto bad;

/* drop packets if interface ID portion is already filled */

ip6 = mtod(m, struct ip6_hdr *);

if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {

if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {

if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src) &&

ip6stat.ip6s_badscope++; /* XXX */

ip6->ip6_src.s6_addr16[1]) {

goto bad;

ip6stat.ip6s_badscope++;

goto bad;

}

if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) &&

ip6->ip6_dst.s6_addr16[1]) {

ip6stat.ip6s_badscope++;

goto bad;

}

if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||

if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))

in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {

ip6->ip6_src.s6_addr16[1]

ip6stat.ip6s_badscope++;

= htons(m->m_pkthdr.rcvif->if_index);

goto bad;

if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))

ip6->ip6_dst.s6_addr16[1]

= htons(m->m_pkthdr.rcvif->if_index);

* We use rt->rt_ifp to determine if the address is ours or not.

* If rt_ifp is lo0, the address is ours.

* The problem here is, rt->rt_ifp for fe80::%lo0/64 is set to lo0,

* so any address under fe80::%lo0/64 will be mistakenly considered

* local. The special case is supplied to handle the case properly

* by actually looking at interface addresses

* (using in6ifa_ifpwithaddr).

if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0 &&

IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) {

if (!in6ifa_ifpwithaddr(m->m_pkthdr.rcvif, &ip6->ip6_dst)) {

icmp6_error(m, ICMP6_DST_UNREACH,

ICMP6_DST_UNREACH_ADDR, 0);

/* m is already freed */

return;

}

ours = 1;

deliverifp = m->m_pkthdr.rcvif;

goto hbhcheck;

}

Line 583 ip6_input(m)

Line 575 ip6_input(m)

hbhcheck:

* record address information into m_tag, if we don't have one yet.

* note that we are unable to record it, if the address is not listed

* as our interface address (e.g. multicast addresses, addresses

* within FAITH prefixes and such).

if (deliverifp && !ip6_getdstifaddr(m)) {

struct in6_ifaddr *ia6;

ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);

if (ia6) {

if (!ip6_setdstifaddr(m, ia6)) {

* XXX maybe we should drop the packet here,

* as we could not provide enough information

* to the upper layers.

}

* Process Hop-by-Hop options header if it's contained.

* m may be modified in ip6_hopopts_input().

* If a JumboPayload option is included, plen will also be modified.

Line 609 ip6_input(m)

Line 622 ip6_input(m)

if (ip6->ip6_plen == 0 && plen == 0) {

* Note that if a valid jumbo payload option is

* contained, ip6_hoptops_input() must set a valid

* contained, ip6_hopopts_input() must set a valid

* (non-zero) payload length to the variable plen.

ip6stat.ip6s_badoptions++;

Line 753 ip6_input(m)

Line 766 ip6_input(m)

}

* set/grab in6_ifaddr correspond to IPv6 destination address.

static struct m_tag *

ip6_setdstifaddr(m, ia6)

struct mbuf *m;

struct in6_ifaddr *ia6;

{

struct m_tag *mtag;

mtag = ip6_addaux(m);

if (mtag)

((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;

return mtag; /* NULL if failed to set */

}

struct in6_ifaddr *

ip6_getdstifaddr(m)

struct mbuf *m;

{

struct m_tag *mtag;

mtag = ip6_findaux(m);

if (mtag)

return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;

else

return NULL;

}

* Hop-by-Hop options header processing. If a valid jumbo payload option is

* included, the real payload length will be stored in plenp.

Line 993 ip6_savecontrol(in6p, mp, ip6, m)

Line 1035 ip6_savecontrol(in6p, mp, ip6, m)

struct ip6_hdr *ip6;

struct mbuf *m;

{

#ifdef RFC2292

#define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))

#else

#define IS2292(x, y) (y)

#endif

#ifdef SO_TIMESTAMP

if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {

Line 1005 ip6_savecontrol(in6p, mp, ip6, m)

Line 1052 ip6_savecontrol(in6p, mp, ip6, m)

mp = &(*mp)->m_next;

}

#endif

if (in6p->in6p_flags & IN6P_RECVDSTADDR) {

*mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst,

sizeof(struct in6_addr), IPV6_RECVDSTADDR, IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

}

#ifdef noyet

/* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */

/* options were tossed above */

if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)

if (in6p->in6p_flags & IN6P_RECVOPTS)

return;

/* broken */

/* ip6_srcroute doesn't do what we want here, need to fix */

if (in6p->in6p_flags & IPV6P_RECVRETOPTS)

/* broken */

#endif

/* RFC 2292 sec. 5 */

if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {

struct in6_pktinfo pi6;

bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));

if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr))

in6_clearscope(&pi6.ipi6_addr); /* XXX */

pi6.ipi6_addr.s6_addr16[1] = 0;

pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?

pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)

m->m_pkthdr.rcvif->if_index : 0;

? m->m_pkthdr.rcvif->if_index

: 0;

*mp = sbcreatecontrol((caddr_t) &pi6,

sizeof(struct in6_pktinfo), IPV6_PKTINFO, IPPROTO_IPV6);

sizeof(struct in6_pktinfo),

IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

}

if (in6p->in6p_flags & IN6P_HOPLIMIT) {

int hlim = ip6->ip6_hlim & 0xff;

*mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int),

IPV6_HOPLIMIT, IPPROTO_IPV6);

IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

}

if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {

u_int32_t flowinfo;

int tclass;

flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);

flowinfo >>= 20;

tclass = flowinfo & 0xff;

*mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass),

IPV6_TCLASS, IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

}

/* IN6P_NEXTHOP - for outgoing packet only */

* IPV6_HOPOPTS socket option. Recall that we required super-user

* privilege for the option (see ip6_ctloutput), but it might be too

* strict, since there might be some hop-by-hop options which can be

* returned to normal user.

* See also RFC 2292 section 6.

* See also RFC3542 section 8 (or RFC2292 section 6).

if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {

Line 1083 ip6_savecontrol(in6p, mp, ip6, m)

Line 1135 ip6_savecontrol(in6p, mp, ip6, m)

* XXX: We copy whole the header even if a jumbo

* payload option is included, which option is to

* be removed before returning in the RFC 2292.

* But it's too painful operation...

* Note: this constraint is removed in RFC3542.

*mp = sbcreatecontrol((caddr_t)hbh, hbhlen,

IPV6_HOPOPTS, IPPROTO_IPV6);

IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),

IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

m_freem(ext);

Line 1105 ip6_savecontrol(in6p, mp, ip6, m)

Line 1158 ip6_savecontrol(in6p, mp, ip6, m)

* Note that the order of the headers remains in

* the chain of ancillary data.

while (1) { /* is explicit loop prevention necessary? */

for (;;) { /* is explicit loop prevention necessary? */

struct ip6_ext *ip6e = NULL;

int elen;

struct mbuf *ext = NULL;

Line 1147 ip6_savecontrol(in6p, mp, ip6, m)

Line 1200 ip6_savecontrol(in6p, mp, ip6, m)

break;

*mp = sbcreatecontrol((caddr_t)ip6e, elen,

IPV6_DSTOPTS, IPPROTO_IPV6);

IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),

IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

break;

Line 1157 ip6_savecontrol(in6p, mp, ip6, m)

Line 1211 ip6_savecontrol(in6p, mp, ip6, m)

break;

*mp = sbcreatecontrol((caddr_t)ip6e, elen,

IPV6_RTHDR, IPPROTO_IPV6);

IS2292(IPV6_2292RTHDR, IPV6_RTHDR),

IPPROTO_IPV6);

if (*mp)

mp = &(*mp)->m_next;

break;

Line 1189 ip6_savecontrol(in6p, mp, ip6, m)

Line 1244 ip6_savecontrol(in6p, mp, ip6, m)

;

}

#undef IS2292

void

ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu)

{

struct socket *so;

struct mbuf *m_mtu;

struct ip6_mtuinfo mtuctl;

so = in6p->in6p_socket;

if (mtu == NULL)

return;

#ifdef DIAGNOSTIC

if (so == NULL) /* I believe this is impossible */

panic("ip6_notify_pmtu: socket is NULL");

#endif

memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */

mtuctl.ip6m_mtu = *mtu;

mtuctl.ip6m_addr = *dst;

if (sa6_recoverscope(&mtuctl.ip6m_addr))

return;

if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl),

IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)

return;

if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu)

== 0) {

m_freem(m_mtu);

/* XXX: should count statistics */

} else

sorwakeup(so);

return;

}

* pull single extension header from mbuf chain. returns single mbuf that

Line 1316 ip6_nexthdr(m, off, proto, nxtp)

Line 1410 ip6_nexthdr(m, off, proto, nxtp)

switch (proto) {

case IPPROTO_IPV6:

/* do not chase beyond intermediate IPv6 headers */

if (off != 0)

return -1;

if (m->m_pkthdr.len < off + sizeof(ip6))

return -1;

m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);

Line 1391 ip6_lasthdr(m, off, proto, nxtp)

Line 1488 ip6_lasthdr(m, off, proto, nxtp)

nxt = -1;

nxtp = &nxt;

}

while (1) {

for (;;) {

newoff = ip6_nexthdr(m, off, proto, nxtp);

if (newoff < 0)

return off;

Line 1405 ip6_lasthdr(m, off, proto, nxtp)

Line 1502 ip6_lasthdr(m, off, proto, nxtp)

}

struct m_tag *

ip6_addaux(m)

struct mbuf *m;

{

struct m_tag *mtag;

mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);

if (!mtag) {

mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),

M_NOWAIT);

if (mtag) {

m_tag_prepend(m, mtag);

bzero(mtag + 1, sizeof(struct ip6aux));

}

return mtag;

}

struct m_tag *

ip6_findaux(m)

struct mbuf *m;

{

struct m_tag *mtag;

mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);

return mtag;

}

void

ip6_delaux(m)

struct mbuf *m;

{

struct m_tag *mtag;

mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);

if (mtag)

m_tag_delete(m, mtag);

}

* System control for IP6

Line 1420 u_char inet6ctlerrmap[PRC_NCMDS] = {

Line 1556 u_char inet6ctlerrmap[PRC_NCMDS] = {

SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")

{

#ifdef RFC2292

#define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))

#else

#define IS2292(x, y) (y)

#endif

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT,

Line 1477 SYSCTL_SETUP(sysctl_net_inet6_ip6_setup,

Line 1618 SYSCTL_SETUP(sysctl_net_inet6_ip6_setup,

IPV6CTL_FORWSRCRT, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_STRUCT, "stats", NULL,

NULL, 0, &?, sizeof(?),

CTL_NET, PF_INET6, IPPROTO_IPV6,

IPV6CTL_STATS, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_STRUCT, "mrtstats", NULL,

NULL, 0, &?, sizeof(?),

CTL_NET, PF_INET6, IPPROTO_IPV6,

Line 1642 SYSCTL_SETUP(sysctl_net_inet6_ip6_setup,

Line 1777 SYSCTL_SETUP(sysctl_net_inet6_ip6_setup,

#endif /* IPNOPRIVPORTS */

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_INT, "use_tempaddr",

SYSCTL_DESCR("Use temporary address"),

NULL, 0, &ip6_use_tempaddr, 0,

CTL_NET, PF_INET6, IPPROTO_IPV6,

CTL_CREATE, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_INT, "temppltime",

SYSCTL_DESCR("preferred lifetime of a temporary address"),

NULL, 0, &ip6_temp_preferred_lifetime, 0,

CTL_NET, PF_INET6, IPPROTO_IPV6,

CTL_CREATE, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_INT, "tempvltime",

SYSCTL_DESCR("valid lifetime of a temporary address"),

NULL, 0, &ip6_temp_valid_lifetime, 0,

CTL_NET, PF_INET6, IPPROTO_IPV6,

CTL_CREATE, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_INT, "maxfrags",

SYSCTL_DESCR("Maximum fragments in reassembly queue"),

NULL, 0, &ip6_maxfrags, 0,

CTL_NET, PF_INET6, IPPROTO_IPV6,

IPV6CTL_MAXFRAGS, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT,

CTLTYPE_STRUCT, "stats",

SYSCTL_DESCR("IPv6 statistics"),

NULL, 0, &ip6stat, sizeof(ip6stat),

CTL_NET, PF_INET6, IPPROTO_IPV6,

IPV6CTL_STATS, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_INT, "use_defaultzone",

SYSCTL_DESCR("Whether to use the default scope zones"),

NULL, 0, &ip6_use_defzone, 0,

CTL_NET, PF_INET6, IPPROTO_IPV6,

IPV6CTL_USE_DEFAULTZONE, CTL_EOL);

sysctl_createv(clog, 0, NULL, NULL,

CTLFLAG_PERMANENT|CTLFLAG_READWRITE,

CTLTYPE_INT, "mcast_pmtu",

SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),

NULL, 0, &ip6_mcast_pmtu, 0,

CTL_NET, PF_INET6, IPPROTO_IPV6,

CTL_CREATE, CTL_EOL);

}

CVSweb <webmaster@jp.NetBSD.org>