Modbus

Add KeepAlive support for all TCP sockets.

2021-03-22, Edouard Tisserant
16ea5cbbda4e
Parents 7c955a1d39e8
Children e319814f1c17
Add KeepAlive support for all TCP sockets.
1 files changed, 12 insertions(+), 0 deletions(-)
  • +12 -0
    mb_tcp.c
    • --- a/mb_tcp.c Mon Jun 01 14:28:49 2020 +0100
    +++ b/mb_tcp.c Mon Mar 22 14:57:48 2021 +0100
    @@ -467,6 +467,18 @@
    }
    /* configure the socket */
    + {
    + int optval;
    + socklen_t optlen = sizeof(optval);
    + optval = 1;
    + if(setsockopt(socket_id, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen) < 0) {
    +#ifdef ERRMSG
    + perror("setsockopt()");
    + fprintf(stderr, ERRMSG_HEAD "Error configuring socket 'KeepAlive' option.\n");
    +#endif
    + return -1;
    + }
    + }
    /* set the TCP no delay flag. */
    {int bool_opt = 1;
    if (setsockopt(socket_id, SOL_TCP, TCP_NODELAY,