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authorNeels Hofmeyr <nhofmeyr@sysmocom.de>2015-12-03 14:12:44 +0100
committerNeels Hofmeyr <nhofmeyr@sysmocom.de>2015-12-03 14:14:43 +0100
commitca2361c23717fd13e33088d6dfe4e2370b714097 (patch)
tree92557322eb5aa947552cce4297c0c4bf44de271c /openbsc/src/gprs/gtphub_vty.c
parentd53c6046bc315cd2ddbdeac86d3b574b371985b6 (diff)
gtphub: implement sgsn_use_sender for NAT.
If an SGSN is behind NAT, we cannot rely on the default ports. Specifically, if a GGSN sends a message, the forwarding to the SGSN should go to whichever port the SGSN last sent from (whether sequence nr is known or not). Add sgsn_use_sender config and VTY command, and store the sender instead of the GSN Address IE and default port if set. Sponsored-by: On-Waves ehi
Diffstat (limited to 'openbsc/src/gprs/gtphub_vty.c')
-rw-r--r--openbsc/src/gprs/gtphub_vty.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gtphub_vty.c b/openbsc/src/gprs/gtphub_vty.c
index 204d1deeb..324d155b9 100644
--- a/openbsc/src/gprs/gtphub_vty.c
+++ b/openbsc/src/gprs/gtphub_vty.c
@@ -87,6 +87,10 @@ static int config_write_gtphub(struct vty *vty)
&g_cfg->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].bind,
&g_cfg->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER].bind);
+ if (g_cfg->sgsn_use_sender) {
+ vty_out(vty, "sgsn-use-sender%s", VTY_NEWLINE);
+ }
+
if (g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].addr_str) {
write_addrs(vty, "sgsn-proxy",
&g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL],
@@ -237,6 +241,28 @@ DEFUN(cfg_gtphub_sgsn_proxy, cfg_gtphub_sgsn_proxy_cmd,
}
+#define SGSN_USE_SENDER_STR \
+ "Ignore SGSN's Address IEs, use sender address and port (useful over NAT)\n"
+
+DEFUN(cfg_gtphub_sgsn_use_sender,
+ cfg_gtphub_sgsn_use_sender_cmd,
+ "sgsn-use-sender",
+ SGSN_USE_SENDER_STR)
+{
+ g_cfg->sgsn_use_sender = 1;
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_gtphub_no_sgsn_use_sender,
+ cfg_gtphub_no_sgsn_use_sender_cmd,
+ "no sgsn-use-sender",
+ NO_STR SGSN_USE_SENDER_STR)
+{
+ g_cfg->sgsn_use_sender = 0;
+ return CMD_SUCCESS;
+}
+
+
/* Copied from sgsn_vty.h */
DEFUN(cfg_grx_ggsn, cfg_grx_ggsn_cmd,
"grx-dns-add A.B.C.D",
@@ -425,6 +451,8 @@ int gtphub_vty_init(struct gtphub *global_hub, struct gtphub_cfg *global_cfg)
install_element(GTPHUB_NODE, &cfg_gtphub_ggsn_proxy_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_proxy_short_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_proxy_cmd);
+ install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_use_sender_cmd);
+ install_element(GTPHUB_NODE, &cfg_gtphub_no_sgsn_use_sender_cmd);
install_element(GTPHUB_NODE, &cfg_grx_ggsn_cmd);
return 0;