version 1.37.2.13, 2002/09/17 21:23:23 |
version 1.67, 2003/10/14 05:33:04 |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the University nor the names of its contributors |
* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
Line 149 struct ip6stat ip6stat; |
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Line 145 struct ip6stat ip6stat; |
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static void ip6_init2 __P((void *)); |
static void ip6_init2 __P((void *)); |
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static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); |
static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); |
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static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int)); |
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/* |
/* |
* IP6 initialization: fill in IP6 protocol switch table. |
* IP6 initialization: fill in IP6 protocol switch table. |
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ip6intrq.ifq_maxlen = ip6qmaxlen; |
ip6intrq.ifq_maxlen = ip6qmaxlen; |
nd6_init(); |
nd6_init(); |
frag6_init(); |
frag6_init(); |
ip6_flow_seq = arc4random(); |
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ip6_init2((void *)0); |
ip6_init2((void *)0); |
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u_int32_t rtalert = ~0; |
u_int32_t rtalert = ~0; |
int nxt, ours = 0; |
int nxt, ours = 0; |
struct ifnet *deliverifp = NULL; |
struct ifnet *deliverifp = NULL; |
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int srcrt = 0; |
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#ifdef IPSEC |
#ifdef IPSEC |
/* |
/* |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
ip6stat.ip6s_total++; |
ip6stat.ip6s_total++; |
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#ifndef PULLDOWN_TEST |
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/* XXX is the line really necessary? */ |
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IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/); |
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#endif |
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/* |
/* |
* If the IPv6 header is not aligned, slurp it up into a new |
* If the IPv6 header is not aligned, slurp it up into a new |
* mbuf with space for link headers, in the event we forward |
* mbuf with space for link headers, in the event we forward |
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if (1) |
if (1) |
#endif |
#endif |
{ |
{ |
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struct in6_addr odst; |
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odst = ip6->ip6_dst; |
if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, |
if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, |
PFIL_IN) != 0) |
PFIL_IN) != 0) |
return; |
return; |
if (m == NULL) |
if (m == NULL) |
return; |
return; |
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
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srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst); |
} |
} |
#endif /* PFIL_HOOKS */ |
#endif /* PFIL_HOOKS */ |
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(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
return; |
return; |
} |
} |
#ifndef PULLDOWN_TEST |
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/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
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hbh = (struct ip6_hbh *)(ip6 + 1); |
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#else |
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IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), |
sizeof(struct ip6_hbh)); |
sizeof(struct ip6_hbh)); |
if (hbh == NULL) { |
if (hbh == NULL) { |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
#endif |
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KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
nxt = hbh->ip6h_nxt; |
nxt = hbh->ip6h_nxt; |
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return; |
return; |
} |
} |
} else if (!ours) { |
} else if (!ours) { |
ip6_forward(m, 0); |
ip6_forward(m, srcrt); |
return; |
return; |
} |
} |
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Line 782 ip6_hopopts_input(plenp, rtalertp, mp, o |
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Line 773 ip6_hopopts_input(plenp, rtalertp, mp, o |
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u_int8_t *opt; |
u_int8_t *opt; |
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/* validation of the length of the header */ |
/* validation of the length of the header */ |
#ifndef PULLDOWN_TEST |
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IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), -1); |
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hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
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hbhlen = (hbh->ip6h_len + 1) << 3; |
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IP6_EXTHDR_CHECK(m, off, hbhlen, -1); |
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hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
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#else |
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IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
if (hbh == NULL) { |
if (hbh == NULL) { |
Line 803 ip6_hopopts_input(plenp, rtalertp, mp, o |
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Line 786 ip6_hopopts_input(plenp, rtalertp, mp, o |
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ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return -1; |
return -1; |
} |
} |
#endif |
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KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
off += hbhlen; |
off += hbhlen; |
hbhlen -= sizeof(struct ip6_hbh); |
hbhlen -= sizeof(struct ip6_hbh); |
Line 1030 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1012 ip6_savecontrol(in6p, mp, ip6, m) |
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microtime(&tv); |
microtime(&tv); |
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), |
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), |
SCM_TIMESTAMP, SOL_SOCKET); |
SCM_TIMESTAMP, SOL_SOCKET); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
#endif |
#endif |
if (in6p->in6p_flags & IN6P_RECVDSTADDR) { |
if (in6p->in6p_flags & IN6P_RECVDSTADDR) { |
*mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst, |
*mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst, |
sizeof(struct in6_addr), IPV6_RECVDSTADDR, |
sizeof(struct in6_addr), IPV6_RECVDSTADDR, IPPROTO_IPV6); |
IPPROTO_IPV6); |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
Line 1062 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1043 ip6_savecontrol(in6p, mp, ip6, m) |
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? m->m_pkthdr.rcvif->if_index |
? m->m_pkthdr.rcvif->if_index |
: 0; |
: 0; |
*mp = sbcreatecontrol((caddr_t) &pi6, |
*mp = sbcreatecontrol((caddr_t) &pi6, |
sizeof(struct in6_pktinfo), IPV6_PKTINFO, |
sizeof(struct in6_pktinfo), IPV6_PKTINFO, IPPROTO_IPV6); |
IPPROTO_IPV6); |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (in6p->in6p_flags & IN6P_HOPLIMIT) { |
if (in6p->in6p_flags & IN6P_HOPLIMIT) { |
int hlim = ip6->ip6_hlim & 0xff; |
int hlim = ip6->ip6_hlim & 0xff; |
*mp = sbcreatecontrol((caddr_t) &hlim, |
*mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int), |
sizeof(int), IPV6_HOPLIMIT, IPPROTO_IPV6); |
IPV6_HOPLIMIT, IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
Line 1094 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1074 ip6_savecontrol(in6p, mp, ip6, m) |
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if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
struct ip6_hbh *hbh; |
struct ip6_hbh *hbh; |
int hbhlen; |
int hbhlen; |
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struct mbuf *ext; |
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#ifndef PULLDOWN_TEST |
ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr), |
hbh = (struct ip6_hbh *)(ip6 + 1); |
ip6->ip6_nxt); |
hbhlen = (hbh->ip6h_len + 1) << 3; |
if (ext == NULL) { |
#else |
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IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
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sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
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if (hbh == NULL) { |
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ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
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hbh = mtod(ext, struct ip6_hbh *); |
hbhlen = (hbh->ip6h_len + 1) << 3; |
hbhlen = (hbh->ip6h_len + 1) << 3; |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
if (hbhlen != ext->m_len) { |
sizeof(struct ip6_hdr), hbhlen); |
m_freem(ext); |
if (hbh == NULL) { |
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ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
#endif |
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/* |
/* |
* XXX: We copy whole the header even if a jumbo |
* XXX: We copy whole the header even if a jumbo |
Line 1121 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1097 ip6_savecontrol(in6p, mp, ip6, m) |
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* But it's too painful operation... |
* But it's too painful operation... |
*/ |
*/ |
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen, |
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen, |
IPV6_HOPOPTS, IPPROTO_IPV6); |
IPV6_HOPOPTS, IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
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m_freem(ext); |
} |
} |
} |
} |
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/* IPV6_DSTOPTS and IPV6_RTHDR socket options */ |
/* IPV6_DSTOPTS and IPV6_RTHDR socket options */ |
if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) { |
if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) { |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);; |
int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr); |
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/* |
/* |
* Search for destination options headers or routing |
* Search for destination options headers or routing |
Line 1140 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1117 ip6_savecontrol(in6p, mp, ip6, m) |
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* the chain of ancillary data. |
* the chain of ancillary data. |
*/ |
*/ |
while (1) { /* is explicit loop prevention necessary? */ |
while (1) { /* is explicit loop prevention necessary? */ |
struct ip6_ext *ip6e; |
struct ip6_ext *ip6e = NULL; |
int elen; |
int elen; |
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struct mbuf *ext = NULL; |
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#ifndef PULLDOWN_TEST |
/* |
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off); |
* if it is not an extension header, don't try to |
if (nxt == IPPROTO_AH) |
* pull it from the chain. |
elen = (ip6e->ip6e_len + 2) << 2; |
*/ |
else |
switch (nxt) { |
elen = (ip6e->ip6e_len + 1) << 3; |
case IPPROTO_DSTOPTS: |
#else |
case IPPROTO_ROUTING: |
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, |
case IPPROTO_HOPOPTS: |
sizeof(struct ip6_ext)); |
case IPPROTO_AH: /* is it possible? */ |
if (ip6e == NULL) { |
break; |
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default: |
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goto loopend; |
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} |
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ext = ip6_pullexthdr(m, off, nxt); |
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if (ext == NULL) { |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
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ip6e = mtod(ext, struct ip6_ext *); |
if (nxt == IPPROTO_AH) |
if (nxt == IPPROTO_AH) |
elen = (ip6e->ip6e_len + 2) << 2; |
elen = (ip6e->ip6e_len + 2) << 2; |
else |
else |
elen = (ip6e->ip6e_len + 1) << 3; |
elen = (ip6e->ip6e_len + 1) << 3; |
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, elen); |
if (elen != ext->m_len) { |
if (ip6e == NULL) { |
m_freem(ext); |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
#endif |
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KASSERT(IP6_HDR_ALIGNED_P(ip6e)); |
KASSERT(IP6_HDR_ALIGNED_P(ip6e)); |
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switch (nxt) { |
switch (nxt) { |
case IPPROTO_DSTOPTS: |
case IPPROTO_DSTOPTS: |
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
break; |
break; |
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Line 1182 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1166 ip6_savecontrol(in6p, mp, ip6, m) |
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break; |
break; |
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*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
IPV6_DSTOPTS, |
IPV6_DSTOPTS, IPPROTO_IPV6); |
IPPROTO_IPV6); |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
break; |
break; |
Line 1193 ip6_savecontrol(in6p, mp, ip6, m) |
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Line 1176 ip6_savecontrol(in6p, mp, ip6, m) |
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break; |
break; |
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*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
IPV6_RTHDR, |
IPV6_RTHDR, IPPROTO_IPV6); |
IPPROTO_IPV6); |
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if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
break; |
break; |
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case IPPROTO_UDP: |
case IPPROTO_HOPOPTS: |
case IPPROTO_TCP: |
case IPPROTO_AH: /* is it possible? */ |
case IPPROTO_ICMPV6: |
break; |
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default: |
default: |
/* |
/* |
* stop search if we encounter an upper |
* other cases have been filtered in the above. |
* layer protocol headers. |
* none will visit this case. here we supply |
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* the code just in case (nxt overwritten or |
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* other cases). |
*/ |
*/ |
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m_freem(ext); |
goto loopend; |
goto loopend; |
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case IPPROTO_HOPOPTS: |
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case IPPROTO_AH: /* is it possible? */ |
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break; |
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} |
} |
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/* proceed with the next header. */ |
/* proceed with the next header. */ |
off += elen; |
off += elen; |
nxt = ip6e->ip6e_nxt; |
nxt = ip6e->ip6e_nxt; |
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ip6e = NULL; |
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m_freem(ext); |
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ext = NULL; |
} |
} |
loopend: |
loopend: |
; |
; |
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} |
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} |
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/* |
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* pull single extension header from mbuf chain. returns single mbuf that |
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* contains the result, or NULL on error. |
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*/ |
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static struct mbuf * |
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ip6_pullexthdr(m, off, nxt) |
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struct mbuf *m; |
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size_t off; |
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int nxt; |
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{ |
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struct ip6_ext ip6e; |
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size_t elen; |
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struct mbuf *n; |
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#ifdef DIAGNOSTIC |
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switch (nxt) { |
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case IPPROTO_DSTOPTS: |
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case IPPROTO_ROUTING: |
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case IPPROTO_HOPOPTS: |
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case IPPROTO_AH: /* is it possible? */ |
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break; |
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default: |
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printf("ip6_pullexthdr: invalid nxt=%d\n", nxt); |
} |
} |
if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { |
#endif |
/* to be done */ |
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m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e); |
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if (nxt == IPPROTO_AH) |
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elen = (ip6e.ip6e_len + 2) << 2; |
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else |
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elen = (ip6e.ip6e_len + 1) << 3; |
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MGET(n, M_DONTWAIT, MT_DATA); |
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if (n && elen >= MLEN) { |
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MCLGET(n, M_DONTWAIT); |
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if ((n->m_flags & M_EXT) == 0) { |
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m_free(n); |
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n = NULL; |
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} |
} |
} |
if ((in6p->in6p_flags & IN6P_DSTOPTS) && privileged) { |
if (!n) |
/* to be done */ |
return NULL; |
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n->m_len = 0; |
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if (elen >= M_TRAILINGSPACE(n)) { |
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m_free(n); |
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return NULL; |
} |
} |
/* IN6P_RTHDR - to be done */ |
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m_copydata(m, off, elen, mtod(n, caddr_t)); |
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n->m_len = elen; |
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return n; |
} |
} |
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/* |
/* |
Line 1319 ip6_nexthdr(m, off, proto, nxtp) |
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Line 1351 ip6_nexthdr(m, off, proto, nxtp) |
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if (m->m_pkthdr.len < off + sizeof(fh)) |
if (m->m_pkthdr.len < off + sizeof(fh)) |
return -1; |
return -1; |
m_copydata(m, off, sizeof(fh), (caddr_t)&fh); |
m_copydata(m, off, sizeof(fh), (caddr_t)&fh); |
if ((ntohs(fh.ip6f_offlg) & IP6F_OFF_MASK) != 0) |
if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0) |
return -1; |
return -1; |
if (nxtp) |
if (nxtp) |
*nxtp = fh.ip6f_nxt; |
*nxtp = fh.ip6f_nxt; |
Line 1359 ip6_nexthdr(m, off, proto, nxtp) |
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Line 1391 ip6_nexthdr(m, off, proto, nxtp) |
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default: |
default: |
return -1; |
return -1; |
} |
} |
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return -1; |
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} |
} |
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/* |
/* |