diff options
Diffstat (limited to 'unix')
| -rw-r--r-- | unix/tclUnixSock.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/unix/tclUnixSock.c b/unix/tclUnixSock.c index 170aea9..d8a33f9 100644 --- a/unix/tclUnixSock.c +++ b/unix/tclUnixSock.c @@ -113,6 +113,11 @@ struct TcpState { #define SOCKET_BUFSIZE 4096 +#ifdef SO_REUSEPORT +/* Bitmask to check if the setting of SO_REUSEPORT was requested by the caller. */ +#define USE_SOCK_REUSEPORT (1 << 16) +#endif + /* * Static routines for this file: */ @@ -1435,6 +1440,10 @@ Tcl_OpenTcpServer( char channelName[SOCK_CHAN_LENGTH]; const char *errorMsg = NULL; TcpFdList *fds = NULL, *newfds; +#ifdef SO_REUSEPORT + int reuseport = port & USE_SOCK_REUSEPORT; + CLEAR_BITS(port, USE_SOCK_REUSEPORT); +#endif /* * Try to record and return the most meaningful error message, i.e. the @@ -1512,6 +1521,17 @@ Tcl_OpenTcpServer( (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &reuseaddr, sizeof(reuseaddr)); +#ifdef SO_REUSEPORT + /* + * Set up to allows multiple sockets on the same host to bind to the same port. + * The flag can be switched on by setting the lowest bit above the valid maximum port (0xffff). + */ + if(reuseport) { + (void) setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, + (char *) &reuseport, sizeof(reuseport)); + } +#endif + /* * Make sure we use the same port number when opening two server * sockets for IPv4 and IPv6 on a random port. |