| version 1.21, 2000/05/19 20:09:27 |
version 1.21.2.1, 2000/06/22 17:10:01 |
|
|
| /* $NetBSD$ */ |
/* $NetBSD$ */ |
| /* $KAME: ip6_input.c,v 1.89 2000/05/19 19:59:05 itojun Exp $ */ |
/* $KAME: ip6_input.c,v 1.94 2000/06/13 10:06:19 jinmei Exp $ */ |
| |
|
| /* |
/* |
| * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
|
|
| if (m->m_next) { |
if (m->m_next) { |
| if (m->m_flags & M_LOOP) { |
if (m->m_flags & M_LOOP) { |
| ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
| } |
} else if (m->m_pkthdr.rcvif->if_index <= 31) |
| else if (m->m_pkthdr.rcvif->if_index <= 31) |
|
| ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
| else |
else |
| ip6stat.ip6s_m2m[0]++; |
ip6stat.ip6s_m2m[0]++; |
|
|
| /* |
/* |
| * Unicast check |
* Unicast check |
| */ |
*/ |
| if (ip6_forward_rt.ro_rt == 0 || |
if (ip6_forward_rt.ro_rt != NULL && |
| !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
(ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 && |
| &ip6_forward_rt.ro_dst.sin6_addr)) { |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
| |
&ip6_forward_rt.ro_dst.sin6_addr)) |
| |
; /* cache hit */ |
| |
else { |
| if (ip6_forward_rt.ro_rt) { |
if (ip6_forward_rt.ro_rt) { |
| |
/* route is down or destination is different */ |
| RTFREE(ip6_forward_rt.ro_rt); |
RTFREE(ip6_forward_rt.ro_rt); |
| ip6_forward_rt.ro_rt = 0; |
ip6_forward_rt.ro_rt = 0; |
| } |
} |
| |
|
| bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); |
bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); |
| ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); |
ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); |
| ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
|
|
| #endif |
#endif |
| return; /* m have already been freed */ |
return; /* m have already been freed */ |
| } |
} |
| |
|
| /* adjust pointer */ |
/* adjust pointer */ |
| ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
| |
|
| |
/* |
| |
* if the payload length field is 0 and the next header field |
| |
* indicates Hop-by-Hop Options header, then a Jumbo Payload |
| |
* option MUST be included. |
| |
*/ |
| |
if (ip6->ip6_plen == 0 && plen == 0) { |
| |
/* |
| |
* Note that if a valid jumbo payload option is |
| |
* contained, ip6_hoptops_input() must set a valid |
| |
* (non-zero) payload length to the variable plen. |
| |
*/ |
| |
ip6stat.ip6s_badoptions++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
| |
return; |
| |
} |
| #ifndef PULLDOWN_TEST |
#ifndef PULLDOWN_TEST |
| /* ip6_hopopts_input() ensures that mbuf is contiguous */ |
/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
| hbh = (struct ip6_hbh *)(ip6 + 1); |
hbh = (struct ip6_hbh *)(ip6 + 1); |
|
|
| m_freem(m); |
m_freem(m); |
| return; |
return; |
| } |
} |
| } |
} else if (!ours) { |
| else if (!ours) { |
|
| ip6_forward(m, 0); |
ip6_forward(m, 0); |
| return; |
return; |
| } |
} |
|
|
| #ifdef IFA_STATS |
#ifdef IFA_STATS |
| if (IFA_STATS && deliverifp != NULL) { |
if (IFA_STATS && deliverifp != NULL) { |
| struct in6_ifaddr *ia6; |
struct in6_ifaddr *ia6; |
| ip6 = mtod(m, struct ip6_hdr *); |
|
| ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
| if (ia6) |
if (ia6) |
| ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
| Line 740 ip6_process_hopopts(m, opthead, hbhlen, |
|
| Line 763 ip6_process_hopopts(m, opthead, hbhlen, |
|
| int optlen = 0; |
int optlen = 0; |
| u_int8_t *opt = opthead; |
u_int8_t *opt = opthead; |
| u_int16_t rtalert_val; |
u_int16_t rtalert_val; |
| |
u_int32_t jumboplen; |
| |
|
| for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { |
for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { |
| switch(*opt) { |
switch(*opt) { |
| Line 768 ip6_process_hopopts(m, opthead, hbhlen, |
|
| Line 792 ip6_process_hopopts(m, opthead, hbhlen, |
|
| *rtalertp = ntohs(rtalert_val); |
*rtalertp = ntohs(rtalert_val); |
| break; |
break; |
| case IP6OPT_JUMBO: |
case IP6OPT_JUMBO: |
| /* XXX may need check for alignment */ |
/* XXX may need check for alignment */ |
| if (hbhlen < IP6OPT_JUMBO_LEN) { |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
| ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
| goto bad; |
goto bad; |
| } |
} |
| if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
| /* XXX: should we discard the packet? */ |
/* XXX: should we discard the packet? */ |
| log(LOG_ERR, "length of jumbopayload opt " |
log(LOG_ERR, "length of jumbopayload opt " |
| "is inconsistent(%d)", |
"is inconsistent(%d)", |
| *(opt + 1)); |
*(opt + 1)); |
| optlen = IP6OPT_JUMBO_LEN; |
optlen = IP6OPT_JUMBO_LEN; |
| |
|
| /* |
/* |
| * We can simply cast because of the alignment |
* IPv6 packets that have non 0 payload length |
| * requirement of the jumbo payload option. |
* must not contain a jumbo paylod option. |
| */ |
*/ |
| #if 0 |
ip6 = mtod(m, struct ip6_hdr *); |
| *plenp = ntohl(*(u_int32_t *)(opt + 2)); |
if (ip6->ip6_plen) { |
| #else |
ip6stat.ip6s_badoptions++; |
| bcopy(opt + 2, plenp, sizeof(*plenp)); |
icmp6_error(m, ICMP6_PARAM_PROB, |
| *plenp = htonl(*plenp); |
ICMP6_PARAMPROB_HEADER, |
| |
sizeof(struct ip6_hdr) + |
| |
sizeof(struct ip6_hbh) + |
| |
opt - opthead); |
| |
return(-1); |
| |
} |
| |
|
| |
/* |
| |
* We may see jumbolen in unaligned location, so |
| |
* we'd need to perform bcopy(). |
| |
*/ |
| |
bcopy(opt + 2, &jumboplen, sizeof(jumboplen)); |
| |
jumboplen = (u_int32_t)htonl(jumboplen); |
| |
|
| |
#if 1 |
| |
/* |
| |
* if there are multiple jumbo payload options, |
| |
* *plenp will be non-zero and the packet will be |
| |
* rejected. |
| |
* the behavior may need some debate in ipngwg - |
| |
* multiple options does not make sense, however, |
| |
* there's no explicit mention in specification. |
| |
*/ |
| |
if (*plenp != 0) { |
| |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
sizeof(struct ip6_hdr) + |
| |
sizeof(struct ip6_hbh) + |
| |
opt + 2 - opthead); |
| |
return(-1); |
| |
} |
| #endif |
#endif |
| if (*plenp <= IPV6_MAXPACKET) { |
|
| /* |
|
| * jumbo payload length must be larger |
|
| * than 65535 |
|
| */ |
|
| ip6stat.ip6s_badoptions++; |
|
| icmp6_error(m, ICMP6_PARAM_PROB, |
|
| ICMP6_PARAMPROB_HEADER, |
|
| sizeof(struct ip6_hdr) + |
|
| sizeof(struct ip6_hbh) + |
|
| opt + 2 - opthead); |
|
| return(-1); |
|
| } |
|
| |
|
| ip6 = mtod(m, struct ip6_hdr *); |
/* |
| if (ip6->ip6_plen) { |
* jumbo payload length must be larger than 65535. |
| /* |
*/ |
| * IPv6 packets that have non 0 payload length |
if (jumboplen <= IPV6_MAXPACKET) { |
| * must not contain a jumbo paylod option. |
ip6stat.ip6s_badoptions++; |
| */ |
icmp6_error(m, ICMP6_PARAM_PROB, |
| ip6stat.ip6s_badoptions++; |
ICMP6_PARAMPROB_HEADER, |
| icmp6_error(m, ICMP6_PARAM_PROB, |
sizeof(struct ip6_hdr) + |
| ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hbh) + |
| sizeof(struct ip6_hdr) + |
opt + 2 - opthead); |
| sizeof(struct ip6_hbh) + |
return(-1); |
| opt - opthead); |
} |
| return(-1); |
*plenp = jumboplen; |
| } |
|
| break; |
break; |
| default: /* unknown option */ |
default: /* unknown option */ |
| if (hbhlen < IP6OPT_MINLEN) { |
if (hbhlen < IP6OPT_MINLEN) { |
| ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |