telnetd: set SO_KEEPALIVE, users report it's useful. +20 bytes.

diff --git a/networking/telnetd.c b/networking/telnetd.c
index f60c4205609a1781ab9c8efd85d0a919384c27f2..46dfb318f11dc2b051545f041a43e97c8be857c3 100644 (file)
--- a/networking/telnetd.c
+++ b/networking/telnetd.c
@@ -182,6 +182,8 @@ make_new_session(
        ndelay_on(fd);
 #if ENABLE_FEATURE_TELNETD_STANDALONE
        ts->sockfd_read = sock;
+       /* SO_KEEPALIVE by popular demand */
+       setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
        ndelay_on(sock);
        if (!sock) { /* We are called with fd 0 - we are in inetd mode */
                sock++; /* so use fd 1 for output */
@@ -191,6 +193,8 @@ make_new_session(
        if (sock > maxfd)
                maxfd = sock;
 #else
+       /* SO_KEEPALIVE by popular demand */
+       setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
        /* ts->sockfd_read = 0; - done by xzalloc */
        ts->sockfd_write = 1;
        ndelay_on(0);