gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)

This is an initial implementation of a netdev driver for GTP datapath (GTP-U) v0 and v1, according to the GSM TS 09.60 and 3GPP TS 29.060 standards. This tunneling protocol is used to prevent subscribers from accessing mobile carrier core network infrastructure. This implementation requires a GGSN userspace daemon that implements the signaling protocol (GTP-C), such as OpenGGSN [1]. This userspace daemon updates the PDP context database that represents active subscriber sessions through a genetlink interface. For more context on this tunneling protocol, you can check the slides that were presented during the NetDev 1.1 [2]. Only IPv4 is supported at this time. [1] http://git.osmocom.org/openggsn/ [2] http://www.netdevconf.org/1.1/proceedings/slides/schultz-welte-osmocom-gtp.pdf

Pablo Neira committed 10 years ago

Commit 459aa661 parent c047c3b8 files · +1462 −1Browse files

Showing the changes to include/uapi (4 of 8 files). Show all

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4 files

include/uapi/linux/Kbuild +1 −0
include/uapi/linux/gtp.h +33 −0
include/uapi/linux/if_link.h +10 −0
include/uapi/linux/udp.h +2 −1

include/uapi/linux/Kbuild+1−0

@@ -141,6 +141,7 @@ header-y += gfs2_ondisk.h · 140 unmodified lines
141	header-y += gigaset_dev.h	141	header-y += gigaset_dev.h
142	header-y += gpio.h	142	header-y += gpio.h
143	header-y += gsmmux.h	143	header-y += gsmmux.h
		144	header-y += gtp.h
144	header-y += hdlcdrv.h	145	header-y += hdlcdrv.h
145	header-y += hdlc.h	146	header-y += hdlc.h
146	header-y += hdreg.h	147	header-y += hdreg.h

include/uapi/linux/gtp.h+33−0

@@ -0,0 +1,33 @@
	1	#ifndef _UAPI_LINUX_GTP_H_
	2	#define _UAPI_LINUX_GTP_H__
	3
	4	enum gtp_genl_cmds {
	5	GTP_CMD_NEWPDP,
	6	GTP_CMD_DELPDP,
	7	GTP_CMD_GETPDP,
	8
	9	GTP_CMD_MAX,
	10	};
	11
	12	enum gtp_version {
	13	GTP_V0 = 0,
	14	GTP_V1,
	15	};
	16
	17	enum gtp_attrs {
	18	GTPA_UNSPEC = 0,
	19	GTPA_LINK,
	20	GTPA_VERSION,
	21	GTPA_TID, /* for GTPv0 only */
	22	GTPA_SGSN_ADDRESS,
	23	GTPA_MS_ADDRESS,
	24	GTPA_FLOW,
	25	GTPA_NET_NS_FD,
	26	GTPA_I_TEI, /* for GTPv1 only */
	27	GTPA_O_TEI, /* for GTPv1 only */
	28	GTPA_PAD,
	29	__GTPA_MAX,
	30	};
	31	#define GTPA_MAX (__GTPA_MAX + 1)
	32
	33	#endif /* _UAPI_LINUX_GTP_H_ */

include/uapi/linux/if_link.h+10−0

@@ -529,6 +529,16 @@ enum { · 528 unmodified lines
529	};	529	};
530	#define IFLA_PPP_MAX (__IFLA_PPP_MAX - 1)	530	#define IFLA_PPP_MAX (__IFLA_PPP_MAX - 1)
531		531
		532	/* GTP section */
		533	enum {
		534	IFLA_GTP_UNSPEC,
		535	IFLA_GTP_FD0,
		536	IFLA_GTP_FD1,
		537	IFLA_GTP_PDP_HASHSIZE,
		538	__IFLA_GTP_MAX,
		539	};
		540	#define IFLA_GTP_MAX (__IFLA_GTP_MAX - 1)
		541
532	/* Bonding section */	542	/* Bonding section */
533		543
534	enum {	544	enum {

include/uapi/linux/udp.h+2−1

@@ -36,6 +36,7 @@ struct udphdr { · 35 unmodified lines
36	#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */	36	#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
37	#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */	37	#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
38	#define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */	38	#define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */
39		39	#define UDP_ENCAP_GTP0 4 /* GSM TS 09.60 */
		40	#define UDP_ENCAP_GTP1U 5 /* 3GPP TS 29.060 */
40		41
41	#endif /* _UAPI_LINUX_UDP_H */	42	#endif /* _UAPI_LINUX_UDP_H */