| commit 7f5475515484885c112dffc51f32db3985acc4d6 |
| Author: Alexey Serbin <alexey@apache.org> |
| Date: Thu Sep 12 23:48:20 2019 -0700 |
| |
| ntp: add SO_REUSEPORT option for NTP server socket |
| |
| This patch makes the NTP server socket capable of binding to a port |
| which is already bound, but not yet listened to. This is useful |
| in scenarios when it's necessary to make chronyd serving NTP requests |
| at a port which has been reserved for chronyd by some other process. |
| |
| diff --git a/ntp_io.c b/ntp_io.c |
| index ab08372..1ab554d 100644 |
| --- a/ntp_io.c |
| +++ b/ntp_io.c |
| @@ -206,6 +206,17 @@ prepare_socket(int family, int port_number, int client_only) |
| LOG(LOGS_ERR, "Could not set %s socket option", "SO_REUSEADDR"); |
| /* Don't quit - we might survive anyway */ |
| } |
| + |
| + /* Make the socket capable of binding to a port which is already bound, |
| + * but not yet listened to. This is useful in scenarios when it's necessary |
| + * to make chronyd serving NTP requests at a port which has been reserved |
| + * for chronyd by some other process. |
| + */ |
| + if (!client_only && port_number && |
| + setsockopt(sock_fd, SOL_SOCKET, SO_REUSEPORT, (char *)&on_off, sizeof(on_off)) < 0) { |
| + LOG(LOGS_ERR, "Could not set %s socket option", "SO_REUSEPORT"); |
| + /* Don't quit yet - we might survive anyway */ |
| + } |
| |
| /* Make the socket capable of sending broadcast pkts - needed for NTP broadcast mode */ |
| if (!client_only && |
