Add a configuration option for TCP keepalives (SO_KEEPALIVE), default off.

[u/mdw/putty] / putty.h

diff --git a/putty.h b/putty.h
index 723f1e6..fed589b 100644 (file)
--- a/putty.h
+++ b/putty.h
@@ -269,7 +269,8 @@ enum {
 struct backend_tag {
     const char *(*init) (void *frontend_handle, void **backend_handle,
                         Config *cfg,
-                        char *host, int port, char **realhost, int nodelay);
+                        char *host, int port, char **realhost, int nodelay,
+                        int keepalive);
     void (*free) (void *handle);
     /* back->reconfig() passes in a replacement configuration. */
     void (*reconfig) (void *handle, Config *cfg);
@@ -329,6 +330,7 @@ struct config_tag {
     int warn_on_close;
     int ping_interval;                /* in seconds */
     int tcp_nodelay;
+    int tcp_keepalives;
     /* Proxy options */
     char proxy_exclude_list[512];
     int proxy_dns;