ip6_cantforward(const struct ip6_hdr *ip6, const struct ifnet *srcifp,
const struct ifnet *dstifp, const char *fmt, ...)
{
char sbuf[INET6_ADDRSTRLEN], dbuf[INET6_ADDRSTRLEN];
char reason[256];
va_list ap;
uint64_t *ip6s;
/* update statistics */
ip6s = IP6_STAT_GETREF();
ip6s[IP6_STAT_CANTFORWARD]++;
if (dstifp)
ip6s[IP6_STAT_BADSCOPE]++;
IP6_STAT_PUTREF();
if (dstifp)
in6_ifstat_inc(dstifp, ifs6_in_discard);
if (ip6_log_time + ip6_log_interval >= time_uptime)
return;
ip6_log_time = time_uptime;
va_start(ap, fmt);
vsnprintf(reason, sizeof(reason), fmt, ap);
va_end(ap);
log(LOG_DEBUG, "Cannot forward from %s@%s to %s@%s nxt %d (%s)\n",
IN6_PRINT(sbuf, &ip6->ip6_src), srcifp ? if_name(srcifp) : "?",
IN6_PRINT(dbuf, &ip6->ip6_dst), dstifp ? if_name(dstifp) : "?",
ip6->ip6_nxt, reason);
}
/* The generic function called in order to pick a port. */
int
portalgo_randport(uint16_t *port, struct inpcb_hdr *inp_hdr, kauth_cred_t cred)
{
int algo, error;
uint16_t lport;
int default_algo;
DPRINTF("%s called\n", __func__);
if (inp_hdr->inph_portalgo == PORTALGO_DEFAULT) {
switch (inp_hdr->inph_af) {
#ifdef INET
case AF_INET:
default_algo = inet4_portalgo;
break;
#endif
#ifdef INET6
case AF_INET6:
default_algo = inet6_portalgo;
break;
#endif
default:
return EINVAL;
}
if (default_algo == PORTALGO_DEFAULT)
algo = PORTALGO_BSD;
else
algo = default_algo;
}
else /* socket specifies the algorithm */
algo = inp_hdr->inph_portalgo;
KASSERT(algo >= 0);
KASSERT(algo < NALGOS);
switch (inp_hdr->inph_af) {
#ifdef INET
case AF_INET: {
char buf[INET_ADDRSTRLEN];
struct inpcb *inp = (struct inpcb *)(void *)inp_hdr;
DPRINTF("local addr: %s\n", IN_PRINT(buf, &inp->inp_laddr));
DPRINTF("local port: %d\n", inp->inp_lport);
DPRINTF("foreign addr: %s\n", IN_PRINT(buf, &inp->inp_faddr));
DPRINTF("foreign port: %d\n", inp->inp_fport);
break;
}
#endif
#ifdef INET6
case AF_INET6: {
char buf[INET6_ADDRSTRLEN];
struct in6pcb *in6p = (struct in6pcb *)(void *)inp_hdr;
DPRINTF("local addr: %s\n", IN6_PRINT(buf, &in6p->in6p_laddr));
DPRINTF("local port: %d\n", in6p->in6p_lport);
DPRINTF("foreign addr: %s\n", IN6_PRINT(buf,
&in6p->in6p_laddr));
DPRINTF("foreign port: %d\n", in6p->in6p_fport);
break;
}
#endif
default:
break;
}
DPRINTF("%s portalgo = %d\n", __func__, algo);
error = (*algos[algo].func)(algo, &lport, inp_hdr, cred);
if (error == 0) {
*port = lport;
} else if (error != EAGAIN) {
uint16_t lastport, mymin, mymax, *pnext_ephemeral;
error = pcb_getports(inp_hdr, &lastport, &mymin,
&mymax, &pnext_ephemeral, algo);
if (error)
return error;
*port = lastport - 1;
}
return error;
}
