[spice-server v3 4/6] net: Introduce red_socket_set_keepalive() helper

[Christophe Fergeau <cfergeau@xxxxxxxxxx>]

This allows to move some low-level code out of reds.c

Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
---
 server/net-utils.c | 32 ++++++++++++++++++++++++++++++++
 server/net-utils.h |  1 +
 server/reds.c      | 25 +------------------------
 3 files changed, 34 insertions(+), 24 deletions(-)

diff --git a/server/net-utils.c b/server/net-utils.c
index 0e533f5..44e1987 100644
--- a/server/net-utils.c
+++ b/server/net-utils.c
@@ -32,6 +32,38 @@
 #include "net-utils.h"
 
 /**
+ * red_socket_set_keepalive:
+ * @fd: a socket file descriptor
+ * @keepalive: whether to enable keepalives on @fd
+ *
+ * Returns: #true if the operation succeeded, #false otherwise.
+ */
+bool red_socket_set_keepalive(int fd, bool enable, int timeout)
+{
+    int keepalive = !!enable;
+
+    if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &keepalive, sizeof(keepalive)) == -1) {
+        if (errno != ENOTSUP) {
+            spice_printerr("setsockopt for keepalive failed, %s", strerror(errno));
+            return false;
+        }
+    }
+
+    if (!enable) {
+        return true;
+    }
+
+    if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &timeout, sizeof(timeout)) == -1) {
+        if (errno != ENOTSUP) {
+            spice_printerr("setsockopt for keepalive timeout failed, %s", strerror(errno));
+            return false;
+        }
+    }
+
+    return true;
+}
+
+/**
  * red_socket_set_no_delay:
  * @fd: a socket file descriptor
  * @no_delay: whether to enable TCP_NODELAY on @fd
diff --git a/server/net-utils.h b/server/net-utils.h
index 023bc6b..d56b479 100644
--- a/server/net-utils.h
+++ b/server/net-utils.h
@@ -20,6 +20,7 @@
 
 #include <stdbool.h>
 
+bool red_socket_set_keepalive(int fd, bool enable, int timeout);
 bool red_socket_set_no_delay(int fd, bool no_delay);
 bool red_socket_set_non_blocking(int fd, bool non_blocking);
 
diff --git a/server/reds.c b/server/reds.c
index 2f2dad8..d741a10 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -2378,29 +2378,6 @@ static void reds_handle_ssl_accept(int fd, int event, void *data)
 
 #define KEEPALIVE_TIMEOUT (10*60)
 
-static bool reds_init_keepalive(int socket)
-{
-    int keepalive = 1;
-    int keepalive_timeout = KEEPALIVE_TIMEOUT;
-
-    if (setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE, &keepalive, sizeof(keepalive)) == -1) {
-        if (errno != ENOTSUP) {
-            spice_printerr("setsockopt for keepalive failed, %s", strerror(errno));
-            return false;
-        }
-    }
-
-    if (setsockopt(socket, SOL_TCP, TCP_KEEPIDLE,
-                   &keepalive_timeout, sizeof(keepalive_timeout)) == -1) {
-        if (errno != ENOTSUP) {
-            spice_printerr("setsockopt for keepalive timeout failed, %s", strerror(errno));
-            return false;
-        }
-    }
-
-    return true;
-}
-
 static RedLinkInfo *reds_init_client_connection(RedsState *reds, int socket)
 {
     RedLinkInfo *link;
@@ -2413,7 +2390,7 @@ static RedLinkInfo *reds_init_client_connection(RedsState *reds, int socket)
        goto error;
     }
 
-    reds_init_keepalive(socket);
+    red_socket_set_keepalive(socket, TRUE, KEEPALIVE_TIMEOUT);
 
     link = spice_new0(RedLinkInfo, 1);
     link->reds = reds;
-- 
2.9.3

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