neels submitted this change.
Allow running without a GTP dev
Allow running without opening a GTP dev for encapsulation/decapsulation.
Probe and open the mnl socket for talking to the GTP kernel module only
when actual GTP devices exist in the config.
A site that is only doing tunnel proxying via netfilter hence does not
require GTP support in the kernel.
Change-Id: Ibb79b3ce1906136f77a895ff6f691d72a92c9fb9
---
M include/osmocom/upf/upf_gtp.h
M src/osmo-upf/osmo_upf_main.c
M src/osmo-upf/upf_gtp.c
3 files changed, 8 insertions(+), 10 deletions(-)
diff --git a/include/osmocom/upf/upf_gtp.h b/include/osmocom/upf/upf_gtp.h
index a67c850..1e0df5e 100644
--- a/include/osmocom/upf/upf_gtp.h
+++ b/include/osmocom/upf/upf_gtp.h
@@ -69,7 +69,7 @@
int upf_gtp_tun_desc_cmp(const struct upf_gtp_tun_desc *a, const struct upf_gtp_tun_desc *b);
-int upf_gtp_genl_open();
+int upf_gtp_genl_ensure_open();
void upf_gtp_genl_close();
int upf_gtp_dev_open(const char *name, bool create_gtp_dev, const char *local_addr, bool listen_for_gtpv0,
diff --git a/src/osmo-upf/osmo_upf_main.c b/src/osmo-upf/osmo_upf_main.c
index b4888af..65a0e84 100644
--- a/src/osmo-upf/osmo_upf_main.c
+++ b/src/osmo-upf/osmo_upf_main.c
@@ -331,9 +331,6 @@
}
}
- if (upf_gtp_genl_open())
- return -1;
-
if (upf_gtp_devs_open())
return -1;
diff --git a/src/osmo-upf/upf_gtp.c b/src/osmo-upf/upf_gtp.c
index 6280e45..d75e8d7 100644
--- a/src/osmo-upf/upf_gtp.c
+++ b/src/osmo-upf/upf_gtp.c
@@ -183,6 +183,12 @@
dev->sgsn_mode = sgsn_mode;
+ rc = upf_gtp_genl_ensure_open();
+ if (rc) {
+ LOG_GTP_DEV(dev, LOGL_ERROR, "Cannot set up GTP device, failed to open mnl_socket\n");
+ return rc;
+ }
+
if (listen_for_gtpv0) {
rc = osmo_sock_init_osa_ofd(&dev->gtpv0.ofd, SOCK_DGRAM, 0, &dev->gtpv0.local_addr, &any,
OSMO_SOCK_F_BIND);
@@ -255,13 +261,8 @@
}
/* Open an MNL socket which allows to create and remove GTP devices (requires CAP_NET_ADMIN). */
-int upf_gtp_genl_open()
+int upf_gtp_genl_ensure_open()
{
- if (g_upf->gtp.mockup) {
- LOGP(DGTP, LOGL_NOTICE, "gtp/mockup active: not opening mnl_socket\n");
- return 0;
- }
-
/* Already open? */
if (g_upf->gtp.nl && g_upf->gtp.genl_id >= 0)
return 0;
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