Keep alive has only been used for OML so far.

This patch refactors the socket configuration into an own function
and uses it for RSL, too.

Ticket: OW#1060
Sponsored-by: On-Waves ehf
---
 src/input/ipaccess.c |   73 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 45 insertions(+), 28 deletions(-)

diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index 8f9865e..6b9d93e 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -610,12 +610,54 @@ struct e1inp_driver ipaccess_driver = {
        .default_delay = 0,
 };
 
+static void update_fd_settings(struct e1inp_line *line, int fd)
+{
+       int ret;
+       int val;
+
+       if (DEFAULT_TCP_KEEPALIVE_RETRY_COUNT) {
+               /* Enable TCP keepalive to find out if the connection is gone */
+               val = 1;
+               ret = setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &val, 
sizeof(val));
+               if (ret < 0)
+                       LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive: 
%s\n",
+                            strerror(errno));
+               else
+                       LOGP(DLINP, LOGL_NOTICE, "Keepalive is set: %i\n", ret);
+
+#if defined(TCP_KEEPIDLE) && defined(TCP_KEEPINTVL) && defined(TCP_KEEPCNT)
+               /* The following options are not portable! */
+               val = DEFAULT_TCP_KEEPALIVE_IDLE_TIMEOUT;
+               ret = setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE,
+                                &val, sizeof(val));
+               if (ret < 0)
+                       LOGP(DLINP, LOGL_NOTICE,
+                            "Failed to set keepalive idle time: %s\n",
+                            strerror(errno));
+               val = DEFAULT_TCP_KEEPALIVE_INTERVAL;
+               ret = setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL,
+                                &val, sizeof(val));
+               if (ret < 0)
+                       LOGP(DLINP, LOGL_NOTICE,
+                            "Failed to set keepalive interval: %s\n",
+                            strerror(errno));
+               val = DEFAULT_TCP_KEEPALIVE_RETRY_COUNT;
+               ret = setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT,
+                                &val, sizeof(val));
+               if (ret < 0)
+                       LOGP(DLINP, LOGL_NOTICE,
+                            "Failed to set keepalive count: %s\n",
+                            strerror(errno));
+       }
+#endif
+}
+
 /* callback of the OML listening filedescriptor */
 static int ipaccess_bsc_oml_cb(struct ipa_server_link *link, int fd)
 {
        int ret;
        int idx = 0;
-       int i, val;
+       int i;
        struct e1inp_line *line;
        struct e1inp_ts *e1i_ts;
        struct osmo_fd *bfd;
@@ -648,33 +690,7 @@ static int ipaccess_bsc_oml_cb(struct ipa_server_link 
*link, int fd)
                goto err_line;
        }
 
-       /* Enable TCP keepalive to find out if the connection is gone */
-       val = 1;
-       ret = setsockopt(bfd->fd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val));
-       if (ret < 0)
-               LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive: %s\n",
-                    strerror(errno));
-       else
-               LOGP(DLINP, LOGL_NOTICE, "Keepalive is set: %i\n", ret);
-
-#if defined(TCP_KEEPIDLE) && defined(TCP_KEEPINTVL) && defined(TCP_KEEPCNT)
-       /* The following options are not portable! */
-       val = DEFAULT_TCP_KEEPALIVE_IDLE_TIMEOUT;
-       ret = setsockopt(bfd->fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof(val));
-       if (ret < 0)
-               LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive idle time: 
%s\n",
-                    strerror(errno));
-       val = DEFAULT_TCP_KEEPALIVE_INTERVAL;
-       ret = setsockopt(bfd->fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, 
sizeof(val));
-       if (ret < 0)
-               LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive interval: 
%s\n",
-                    strerror(errno));
-       val = DEFAULT_TCP_KEEPALIVE_RETRY_COUNT;
-       ret = setsockopt(bfd->fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof(val));
-       if (ret < 0)
-               LOGP(DLINP, LOGL_NOTICE, "Failed to set keepalive count: %s\n",
-                    strerror(errno));
-#endif
+       update_fd_settings(line, bfd->fd);
 
        /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno 
*/
        ret = ipaccess_send_id_req(bfd->fd);
@@ -736,6 +752,7 @@ static int ipaccess_bsc_rsl_cb(struct ipa_server_link 
*link, int fd)
                        strerror(errno));
                goto err_socket;
        }
+       update_fd_settings(line, bfd->fd);
        return ret;
 
 err_socket:
-- 
1.7.9.5


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