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miniupnpd: Disable port forwarding when upstream interface is down 

Obviously port forwarding cannot work when upstream interface is down. So
correctly report status code for port forwarding requests to clients in
this case.
This commit is contained in:
Pali Rohár 2021-08-06 16:13:25 +02:00
parent 6f848ae082
commit 7ee554d31b
1 changed files with 1 additions and 0 deletions
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miniupnpd/miniupnpd.c
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@ -2239,6 +2239,7 @@ main(int argc, char * * argv)
struct in_addr addr;
if (getifaddr(ext_if_name, if_addr, INET_ADDRSTRLEN, &addr, NULL) < 0) {
syslog(LOG_WARNING, "Cannot get IP address for ext interface %s. Network is down", ext_if_name);
disable_port_forwarding = 1;
} else if (addr_is_reserved(&addr)) {
syslog(LOG_INFO, "Reserved / private IP address %s on ext interface %s: Port forwarding is impossible", if_addr, ext_if_name);
syslog(LOG_INFO, "You are probably behind NAT, enable option ext_perform_stun=yes to detect public IP address");