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--- a/oor/data-plane/tun/tun.c
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+++ b/oor/data-plane/tun/tun.c
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@@ -53,6 +53,8 @@ int tun_rm_fwd_from_entry(lisp_addr_t *e
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tun_dplane_data_t * tun_dplane_data_new_init(oor_encap_t encap_type, glist_t *allowed_dst_eids);
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void tun_dplane_data_free(tun_dplane_data_t *data);
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+int tun_receive_fd;
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+int tun_ifindex;
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data_plane_struct_t dplane_tun = {
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.datap_init = tun_configure_data_plane,
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--- a/oor/data-plane/tun/tun.h
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+++ b/oor/data-plane/tun/tun.h
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@@ -60,9 +60,9 @@
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/* Tun MN variables */
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-int tun_receive_fd;
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-int tun_ifindex;
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-uint8_t *tun_receive_buf;
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+extern int tun_receive_fd;
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+extern int tun_ifindex;
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+extern uint8_t *tun_receive_buf;
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lisp_addr_t * tun_get_default_output_address(int afi);
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int tun_get_default_output_socket(int);
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