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socket: Add Support for TCP keep alive variables

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The tcp keep alive variables now can be configured via conf
parameter. Follwing variables are now supported by this patch.

tcp_keepalive_intvl: The number of seconds between TCP keep-alive probes

tcp_keepalive_probes: The maximum number of TCP keep-alive probes to
send before giving up and killing the connection if no response is
obtained from the other end.

tcp_keepalive_time: The number of seconds a connection needs to be
idle before TCP begins sending out keep-alive probes.
This commit is contained in:
Susant Sahani
2014-08-14 19:48:57 -04:00
committed by Zbigniew Jędrzejewski-Szmek
parent 1dbe0a6efd
commit 209e9dcd7b
5 changed files with 81 additions and 0 deletions
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src/core/socket.c
+36
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@@ -462,6 +462,7 @@ _const_ static const char* listen_lookup(int family, int type) {
}
static void socket_dump(Unit *u, FILE *f, const char *prefix) {
char time_string[FORMAT_TIMESPAN_MAX];
SocketExecCommand c;
Socket *s = SOCKET(u);
SocketPort *p;
@@ -595,6 +596,23 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
prefix, strna(s->user),
prefix, strna(s->group));
if(s->keep_alive_time)
fprintf(f,
"%sKeepAliveTime: %s\n",
prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX,
s->keep_alive_time, USEC_PER_SEC));
if(s->keep_alive_interval)
fprintf(f,
"%sKeepAliveInterval: %s\n",
prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX,
s->keep_alive_interval, USEC_PER_SEC));
if(s->keep_alive_cnt)
fprintf(f,
"%sKeepAliveProbes: %u\n",
prefix, s->keep_alive_cnt);
LIST_FOREACH(port, p, s->ports) {
if (p->type == SOCKET_SOCKET) {
@@ -792,6 +810,24 @@ static void socket_apply_socket_options(Socket *s, int fd) {
log_warning_unit(UNIT(s)->id, "SO_KEEPALIVE failed: %m");
}
if (s->keep_alive_time) {
int value = s->keep_alive_time / USEC_PER_SEC;
if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0)
log_warning_unit(UNIT(s)->id, "TCP_KEEPIDLE failed: %m");
}
if (s->keep_alive_interval) {
int value = s->keep_alive_interval / USEC_PER_SEC;
if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0)
log_warning_unit(UNIT(s)->id, "TCP_KEEPINTVL failed: %m");
}
if (s->keep_alive_cnt) {
int value = s->keep_alive_cnt;
if (setsockopt(fd, SOL_SOCKET, TCP_KEEPCNT, &value, sizeof(value)) < 0)
log_warning_unit(UNIT(s)->id, "TCP_KEEPCNT failed: %m");
}
if (s->no_delay) {
int b = s->no_delay;
if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &b, sizeof(b)) < 0)