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Turn on keepalive on accepted amlc telnet connections

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On linux, keepalive defaults off.  The default timer on linux
is 7200 seconds.  Do we need to make a note in the docs about
setting /proc/sys/net/ipv4/tcp_keepalive_time?
This commit is contained in:
Dennis Boone
2020-05-16 22:51:14 -04:00
parent 07c7232878
commit 7e8e7236ec
1 changed files with 3 additions and 0 deletions
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3
devamlc.h
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@@ -911,6 +911,9 @@ int devamlc (int class, int func, int device) {
optval = 1;
if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &optval, sizeof(optval)) == -1)
perror("unable to set TCP_NODELAY");
/* Should we re-set optval here? Any chance it gets modified? */
if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &optval, sizeof(optval)) == -1)
perror("unable to set SO_KEEPALIVE");
/* these Telnet commands put the connecting telnet client
into character-at-a-time mode and binary mode. Since