static int enable_nat(const char *interface)
{
int err;
if (interface == NULL)
return 0;
/* Enable IPv4 forwarding */
err = enable_ip_forward(TRUE);
if (err < 0)
return err;
/* POSTROUTING flush */
err = __connman_iptables_command("-t nat -F POSTROUTING");
if (err < 0)
return err;
/* Enable masquerading */
err = __connman_iptables_command("-t nat -A POSTROUTING "
"-o %s -j MASQUERADE", interface);
if (err < 0)
return err;
return __connman_iptables_commit("nat");
}
static int enable_nat(struct connman_nat *nat)
{
int err;
g_free(nat->interface);
nat->interface = g_strdup(default_interface);
if (nat->interface == NULL)
return 0;
/* Enable masquerading */
if(nat->address) {
err = __connman_iptables_command("-t nat -A POSTROUTING "
"-s %s/%d -o %s -j MASQUERADE",
nat->address,
nat->prefixlen,
nat->interface);
if (err < 0)
return err;
}
else {
err = __connman_iptables_command("-t nat -A POSTROUTING "
"-o %s -j MASQUERADE",
nat->interface);
if (err < 0)
return err;
}
return __connman_iptables_commit("nat");
}
static void disable_nat(struct connman_nat *nat)
{
int err;
if (nat->interface == NULL)
return;
/* Disable masquerading */
if(nat->address) {
err = __connman_iptables_command("-t nat -D POSTROUTING "
"-s %s/%d -o %s -j MASQUERADE",
nat->address,
nat->prefixlen,
nat->interface);
if (err < 0)
return;
}
else {
err = __connman_iptables_command("-t nat -D POSTROUTING "
"-o %s -j MASQUERADE",
nat->interface);
if (err < 0)
return;
}
__connman_iptables_commit("nat");
}
static void flush_nat(void)
{
int err;
err = __connman_iptables_command("-t nat -F POSTROUTING");
if (err < 0) {
DBG("Flushing the nat table failed");
return;
}
__connman_iptables_commit("nat");
}
static void disable_nat(const char *interface)
{
int err;
/* Disable IPv4 forwarding */
enable_ip_forward(FALSE);
/* POSTROUTING flush */
err = __connman_iptables_command("-t nat -F POSTROUTING");
if (err < 0)
return;
__connman_iptables_commit("nat");
}
