#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#if !(defined(__APPLE__))
#include <netinet6/in6_pcb.h>
#endif
#include <netinet/icmp6.h>
#if MIP6
int (*mip6_store_dstopt_pre_hook)(struct mbuf *m, u_int8_t *opt,
u_int8_t off, u_int8_t dstlen) = NULL;
int (*mip6_rec_ctrl_sig_hook)(struct mbuf *m, int off) = NULL;
#endif
int
dest6_input(mp, offp, proto)
struct mbuf **mp;
int *offp, proto;
{
register struct mbuf *m = *mp;
int off = *offp, dstoptlen, optlen;
struct ip6_dest *dstopts;
u_int8_t *opt;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, sizeof(*dstopts));
if (dstopts == NULL)
return IPPROTO_DONE;
#endif
dstoptlen = (dstopts->ip6d_len + 1) << 3;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, dstoptlen);
if (dstopts == NULL)
return IPPROTO_DONE;
#endif
off += dstoptlen;
dstoptlen -= sizeof(struct ip6_dest);
opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
switch(*opt) {
case IP6OPT_PAD1:
optlen = 1;
break;
case IP6OPT_PADN:
if (dstoptlen < IP6OPT_MINLEN) {
ip6stat.ip6s_toosmall++;
goto bad;
}
optlen = *(opt + 1) + 2;
break;
#if MIP6
case IP6OPT_BINDING_UPDATE:
case IP6OPT_BINDING_ACK:
case IP6OPT_BINDING_REQ:
case IP6OPT_HOME_ADDRESS:
if (mip6_store_dstopt_pre_hook) {
if ((*mip6_store_dstopt_pre_hook)(m, opt, off, dstoptlen) != 0)
goto bad;
}
optlen = *(opt + 1) + 2;
break;
#endif
default:
if (dstoptlen < IP6OPT_MINLEN) {
ip6stat.ip6s_toosmall++;
goto bad;
}
if ((optlen = ip6_unknown_opt(opt, m,
opt-mtod(m, u_int8_t *))) == -1)
return(IPPROTO_DONE);
optlen += 2;
break;
}
}
#if MIP6
if (mip6_rec_ctrl_sig_hook) {
if ((*mip6_rec_ctrl_sig_hook)(m, *offp) != 0)
return(IPPROTO_DONE);
}
#endif
*offp = off;
return(dstopts->ip6d_nxt);
bad:
m_freem(m);
return(IPPROTO_DONE);
}