[GPRS] Rename gsm_04_08_gprs.c to gprs_gmm.c

GMM refers to GPRS Mobility Management.

1 files changed, 0 insertions, 762 deletions

diff --git a/openbsc/src/gprs/gsm_04_08_gprs.c b/openbsc/src/gprs/gsm_04_08_gprs.c
deleted file mode 100644
index 4a42113f0..000000000
--- a/openbsc/src/gprs/gsm_04_08_gprs.c
+++ /dev/null
@@ -1,762 +0,0 @@
-/* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface
- * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
-
-/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
- *
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-#include <openbsc/db.h>
-#include <osmocore/msgb.h>
-#include <osmocore/tlv.h>
-#include <osmocore/gsm_utils.h>
-#include <osmocore/signal.h>
-#include <osmocore/talloc.h>
-
-#include <openbsc/debug.h>
-#include <openbsc/gsm_data.h>
-#include <openbsc/gsm_subscriber.h>
-#include <openbsc/gsm_04_08.h>
-#include <openbsc/gsm_04_08_gprs.h>
-#include <openbsc/paging.h>
-#include <openbsc/transaction.h>
-#include <openbsc/gprs_bssgp.h>
-#include <openbsc/gprs_llc.h>
-#include <openbsc/gprs_sgsn.h>
-
-/* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */
-struct value_string gmm_cause_names[] = {
-	/* FIXME */
-	{ GMM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" },
-	{ GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" },
-	{ GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL,
-			"Message type non-existant or not implemented" },
-	{ GMM_CAUSE_MSGT_INCOMP_P_STATE,
-			"Message type not compatible with protocol state" },
-	{ GMM_CAUSE_IE_NOTEXIST_NOTIMPL,
-			"Information element non-existent or not implemented" },
-	{ GMM_CAUSE_COND_IE_ERR, "Conditional IE error" },
-	{ GMM_CAUSE_MSG_INCOMP_P_STATE,
-				"Message not compatible with protocol state " },
-	{ GMM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" },
-	{ 0, NULL }
-};
-
-/* 10.5.6.6 SM Cause / Table 10.5.157 */
-struct value_string gsm_cause_names[] = {
-	{ GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" },
-	{ GSM_CAUSE_MISSING_APN, "Missing or unknown APN" },
-	{ GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" },
-	{ GSM_CAUSE_AUTH_FAILED, "User Authentication failed" },
-	{ GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" },
-	{ GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" },
-	{ GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" },
-	{ GSM_CAUSE_REQ_SERV_OPT_NOTSUB,
-				"Requested service option not subscribed" },
-	{ GSM_CAUSE_SERV_OPT_TEMP_OOO,
-				"Service option temporarily out of order" },
-	{ GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" },
-	{ GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" },
-	{ GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" },
-	{ GSM_CAUSE_NET_FAIL, "Network Failure" },
-	{ GSM_CAUSE_REACT_RQD, "Reactivation required" },
-	{ GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " },
-	{ GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" },
-	{ GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" },
-	{ GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" },
-	{ GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL,
-			"Message type non-existant or not implemented" },
-	{ GSM_CAUSE_MSGT_INCOMP_P_STATE,
-			"Message type not compatible with protocol state" },
-	{ GSM_CAUSE_IE_NOTEXIST_NOTIMPL,
-			"Information element non-existent or not implemented" },
-	{ GSM_CAUSE_COND_IE_ERR, "Conditional IE error" },
-	{ GSM_CAUSE_MSG_INCOMP_P_STATE,
-				"Message not compatible with protocol state " },
-	{ GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" },
-	{ 0, NULL }
-};
-
-static const char *att_name(uint8_t type)
-{
-	switch (type) {
-	case GPRS_ATT_T_ATTACH:
-		return "GPRS attach";
-	case GPRS_ATT_T_ATT_WHILE_IMSI:
-		return "GPRS attach while IMSI attached";
-	case GPRS_ATT_T_COMBINED:
-		return "Combined GPRS/IMSI attach";
-	default:
-		return "unknown";
-	}
-}
-
-static const char *upd_name(uint8_t type)
-{
-	switch (type) {
-	case GPRS_UPD_T_RA:
-		return "RA updating";
-	case GPRS_UPD_T_RA_LA:
-		return "combined RA/LA updating";
-	case GPRS_UPD_T_RA_LA_IMSI_ATT:
-		return "combined RA/LA updating + IMSI attach";
-	case GPRS_UPD_T_PERIODIC:
-		return "periodic updating";
-	}
-	return "unknown";
-}
-
-/* Send a message through the underlying layer */
-static int gsm48_gmm_sendmsg(struct msgb *msg, int command)
-{
-	/* caller needs to provide TLLI, BVCI and NSEI */
-	return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command);
-}
-
-/* copy identifiers from old message to new message, this
- * is required so lower layers can route it correctly */
-static void gmm_copy_id(struct msgb *msg, const struct msgb *old)
-{
-	msgb_tlli(msg) = msgb_tlli(old);
-	msgb_bvci(msg) = msgb_bvci(old);
-	msgb_nsei(msg) = msgb_nsei(old);
-}
-
-static struct gsm48_qos default_qos = {
-	.delay_class = 4,	/* best effort */
-	.reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT,
-	.peak_tput = GSM48_QOS_PEAK_TPUT_32000bps,
-	.preced_class = GSM48_QOS_PC_NORMAL,
-	.mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT,
-	.traf_class = GSM48_QOS_TC_INTERACTIVE,
-	.deliv_order = GSM48_QOS_DO_UNORDERED,
-	.deliv_err_sdu = GSM48_QOS_ERRSDU_YES,
-	.max_sdu_size = GSM48_QOS_MAXSDU_1520,
-	.max_bitrate_up = GSM48_QOS_MBRATE_63k,
-	.max_bitrate_down = GSM48_QOS_MBRATE_63k,
-	.resid_ber = GSM48_QOS_RBER_5e_2,
-	.sdu_err_ratio = GSM48_QOS_SERR_1e_2,
-	.handling_prio = 3,
-	.xfer_delay = 0x10,	/* 200ms */
-	.guar_bitrate_up = GSM48_QOS_MBRATE_0k,
-	.guar_bitrate_down = GSM48_QOS_MBRATE_0k,
-	.sig_ind = 0,	/* not optimised for signalling */
-	.max_bitrate_down_ext = 0,	/* use octet 9 */
-	.guar_bitrate_down_ext = 0,	/* use octet 13 */
-};
-
-/* Chapter 9.4.2: Attach accept */
-static int gsm48_tx_gmm_att_ack(struct msgb *old_msg)
-{
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_hdr *gh;
-	struct gsm48_attach_ack *aa;
-	struct gprs_ra_id ra_id;
-
-	DEBUGP(DMM, "<- GPRS ATTACH ACCEPT\n");
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
-	gh->proto_discr = GSM48_PDISC_MM_GPRS;
-	gh->msg_type = GSM48_MT_GMM_ATTACH_ACK;
-
-	aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa));
-	aa->force_stby = 0;	/* not indicated */
-	aa->att_result = 1;	/* GPRS only */
-	aa->ra_upd_timer = GPRS_TMR_MINUTE | 10;
-	aa->radio_prio = 4;	/* lowest */
-	bssgp_parse_cell_id(&ra_id, msgb_bcid(old_msg));
-	gsm48_construct_ra(aa->ra_id.digits, &ra_id);
-
-	/* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Chapter 9.4.5: Attach reject */
-static int gsm48_tx_gmm_att_rej(struct msgb *old_msg, uint8_t gmm_cause)
-{
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_hdr *gh;
-
-	DEBUGP(DMM, "<- GPRS ATTACH REJECT\n");
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
-	gh->proto_discr = GSM48_PDISC_MM_GPRS;
-	gh->msg_type = GSM48_MT_GMM_ATTACH_REJ;
-	gh->data[0] = gmm_cause;
-
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Transmit Chapter 9.4.12 Identity Request */
-static int gsm48_tx_gmm_id_req(struct msgb *old_msg, uint8_t id_type)
-{
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_hdr *gh;
-
-	DEBUGP(DMM, "-> GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type);
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
-	gh->proto_discr = GSM48_PDISC_MM_GPRS;
-	gh->msg_type = GSM48_MT_GMM_ID_REQ;
-	/* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */
-	gh->data[0] = id_type & 0xf;
-
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Check if we can already authorize a subscriber */
-static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx, struct msgb *msg)
-{
-	if (strlen(ctx->imei) && strlen(ctx->imsi)) {
-		ctx->mm_state = GMM_REGISTERED_NORMAL;
-		return gsm48_tx_gmm_att_ack(msg);
-	} 
-	if (!strlen(ctx->imei))
-		return gsm48_tx_gmm_id_req(msg, GSM_MI_TYPE_IMEI);
-
-	if (!strlen(ctx->imsi))
-		return gsm48_tx_gmm_id_req(msg, GSM_MI_TYPE_IMSI);
-
-	return 0;
-}
-
-/* Parse Chapter 9.4.13 Identity Response */
-static int gsm48_rx_gmm_id_resp(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK;
-	char mi_string[GSM48_MI_SIZE];
-	struct gprs_ra_id ra_id;
-	struct sgsn_mm_ctx *ctx;
-
-	gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]);
-	DEBUGP(DMM, "GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ",
-		mi_type, mi_string);
-
-	bssgp_parse_cell_id(&ra_id, msgb_bcid(msg));
-	ctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id);
-	if (!ctx) {
-		DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg));
-		return -EINVAL;
-	}
-
-	switch (mi_type) {
-	case GSM_MI_TYPE_IMSI:
-		/* we already have a mm context with current TLLI, but no
-		 * P-TMSI / IMSI yet.  What we now need to do is to fill
-		 * this initial context with data from the HLR */
-		strncpy(ctx->imsi, mi_string, sizeof(ctx->imei));
-		break;
-	case GSM_MI_TYPE_IMEI:
-		strncpy(ctx->imei, mi_string, sizeof(ctx->imei));
-		break;
-	case GSM_MI_TYPE_IMEISV:
-		break;
-	}
-
-	DEBUGPC(DMM, "\n");
-	/* Check if we can let the mobile station enter */
-	return gsm48_gmm_authorize(ctx, msg);
-}
-
-static void attach_rej_cb(void *data)
-{
-	struct sgsn_mm_ctx *ctx = data;
-
-	/* FIXME: determine through which BTS/TRX to send this */
-	//gsm48_tx_gmm_att_rej(ctx->tlli, GMM_CAUSE_MS_ID_NOT_DERIVED);
-	ctx->mm_state = GMM_DEREGISTERED;
-	/* FIXME: release the context */
-}
-
-static void schedule_reject(struct sgsn_mm_ctx *ctx)
-{
-	ctx->T = 3370;
-	ctx->timer.cb = attach_rej_cb;
-	ctx->timer.data = ctx;
-	bsc_schedule_timer(&ctx->timer, 6, 0);
-}
-
-/* Section 9.4.1 Attach request */
-static int gsm48_rx_gmm_att_req(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	uint8_t *cur = gh->data, *msnc, *mi, *old_ra_info;
-	uint8_t msnc_len, att_type, mi_len, mi_type;
-	uint16_t drx_par;
-	uint32_t tmsi;
-	char mi_string[GSM48_MI_SIZE];
-	struct gprs_ra_id ra_id;
-	uint16_t cid;
-	struct sgsn_mm_ctx *ctx;
-
-	DEBUGP(DMM, "GMM ATTACH REQUEST ");
-
-	/* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either
-	 * with a foreign TLLI (P-TMSI that was allocated to the MS before),
-	 * or with random TLLI. */
-
-	cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg));
-
-	/* MS network capability 10.5.5.12 */
-	msnc_len = *cur++;
-	msnc = cur;
-	if (msnc_len > 2)
-		goto err_inval;
-	cur += msnc_len;
-
-	/* aTTACH Type 10.5.5.2 */
-	att_type = *cur++ & 0x0f;
-
-	/* DRX parameter 10.5.5.6 */
-	drx_par = *cur++;
-	drx_par |= *cur++ << 8;
-
-	/* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */
-	mi_len = *cur++;
-	mi = cur;
-	if (mi_len > 8)
-		goto err_inval;
-	mi_type = *mi & GSM_MI_TYPE_MASK;
-	cur += mi_len;
-
-	gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len);
-
-	DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, att_name(att_type));
-
-	/* Old routing area identification 10.5.5.15 */
-	old_ra_info = cur;
-	cur += 6;
-
-	/* MS Radio Access Capability 10.5.5.12a */
-
-	/* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */
-
-	switch (mi_type) {
-	case GSM_MI_TYPE_IMSI:
-		/* Try to find MM context based on IMSI */
-		ctx = sgsn_mm_ctx_by_imsi(mi_string);
-		if (!ctx) {
-#if 0
-			return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN);
-#else
-			/* As a temorary hack, we simply assume that the IMSI exists */
-			ctx = sgsn_mm_ctx_alloc(0, &ra_id);
-			if (!ctx)
-				return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_NET_FAIL);
-			strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi));
-#endif
-		}
-		/* FIXME: Start some timer */
-		ctx->mm_state = GMM_COMMON_PROC_INIT;
-		ctx->tlli = msgb_tlli(msg);
-		break;
-	case GSM_MI_TYPE_TMSI:
-		tmsi = strtoul(mi_string, NULL, 10);
-		/* Try to find MM context based on P-TMSI */
-		ctx = sgsn_mm_ctx_by_ptmsi(tmsi);
-		if (!ctx) {
-			ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id);
-			/* FIXME: Start some timer */
-			ctx->mm_state = GMM_COMMON_PROC_INIT;
-			ctx->tlli = msgb_tlli(msg);
-		}
-		break;
-	default:
-		return 0;
-	}
-	/* Update MM Context with currient RA and Cell ID */
-	ctx->ra = ra_id;
-	ctx->cell_id = cid;
-
-	/* FIXME: allocate a new P-TMSI (+ P-TMSI signature) */
-	/* FIXME: update the TLLI with the new local TLLI based on the P-TMSI */
-
-	DEBUGPC(DMM, "\n");
-
-	return ctx ? gsm48_gmm_authorize(ctx, msg) : 0;
-
-err_inval:
-	DEBUGPC(DMM, "\n");
-	return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_SEM_INCORR_MSG);
-}
-
-/* Chapter 9.4.15: Routing area update accept */
-static int gsm48_tx_gmm_ra_upd_ack(struct msgb *old_msg)
-{
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_hdr *gh;
-	struct gsm48_ra_upd_ack *rua;
-	struct gprs_ra_id ra_id;
-
-	DEBUGP(DMM, "<- ROUTING AREA UPDATE ACCEPT\n");
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
-	gh->proto_discr = GSM48_PDISC_MM_GPRS;
-	gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK;
-
-	rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua));
-	rua->force_stby = 0;	/* not indicated */
-	rua->upd_result = 0;	/* RA updated */
-	rua->ra_upd_timer = GPRS_TMR_MINUTE | 10;
-
-	bssgp_parse_cell_id(&ra_id, msgb_bcid(old_msg));
-	gsm48_construct_ra(rua->ra_id.digits, &ra_id);
-
-	/* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Chapter 9.4.17: Routing area update reject */
-static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause)
-{
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_hdr *gh;
-
-	DEBUGP(DMM, "<- ROUTING AREA UPDATE REJECT\n");
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2);
-	gh->proto_discr = GSM48_PDISC_MM_GPRS;
-	gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ;
-	gh->data[0] = cause;
-	gh->data[1] = 0; /* ? */
-
-	/* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Chapter 9.4.14: Routing area update request */
-static int gsm48_rx_gmm_ra_upd_req(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	struct sgsn_mm_ctx *mmctx;
-	uint8_t *cur = gh->data;
-	struct gprs_ra_id old_ra_id;
-	uint8_t upd_type;
-
-	/* Update Type 10.5.5.18 */
-	upd_type = *cur++ & 0x0f;
-
-	DEBUGP(DMM, "GMM RA UPDATE REQUEST type=\"%s\" ", upd_name(upd_type));
-
-	/* Old routing area identification 10.5.5.15 */
-	gsm48_parse_ra(&old_ra_id, cur);
-	cur += 6;
-
-	/* MS Radio Access Capability 10.5.5.12a */
-
-	/* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status,
-	 * DRX parameter, MS network capability */
-
-	switch (upd_type) {
-	case GPRS_UPD_T_RA_LA:
-	case GPRS_UPD_T_RA_LA_IMSI_ATT:
-		DEBUGPC(DMM, " unsupported in Mode III, is your SI13 corrupt?\n");
-		return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_PROTO_ERR_UNSPEC);
-		break;
-	case GPRS_UPD_T_RA:
-	case GPRS_UPD_T_PERIODIC:
-		break;
-	}
-
-	/* Look-up the MM context based on old RA-ID and TLLI */
-	mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id);
-	if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) {
-		/* The MS has to perform GPRS attach */
-		DEBUGPC(DMM, " REJECT\n");
-		return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_IMPL_DETACHED);
-	}
-
-	/* Update the MM context with the new RA-ID */
-	bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg));
-	/* Update the MM context with the new TLLI */
-	mmctx->tlli = msgb_tlli(msg);
-	/* FIXME: Update the MM context with the MS radio acc capabilities */
-	/* FIXME: Update the MM context with the MS network capabilities */
-
-	DEBUGPC(DMM, " ACCEPT\n");
-	return gsm48_tx_gmm_ra_upd_ack(msg);
-}
-
-static int gsm48_rx_gmm_status(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = msgb_l3(msg);
-
-	DEBUGP(DMM, "GPRS MM STATUS (cause: %s)\n",
-		get_value_string(gmm_cause_names, gh->data[0]));
-
-	return 0;
-}
-
-/* GPRS Mobility Management */
-static int gsm0408_rcv_gmm(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	int rc;
-
-	switch (gh->msg_type) {
-	case GSM48_MT_GMM_RA_UPD_REQ:
-		rc = gsm48_rx_gmm_ra_upd_req(msg);
-		break;
-	case GSM48_MT_GMM_ATTACH_REQ:
-		rc = gsm48_rx_gmm_att_req(msg);
-		break;
-	case GSM48_MT_GMM_ID_RESP:
-		rc = gsm48_rx_gmm_id_resp(msg);
-		break;
-	case GSM48_MT_GMM_STATUS:
-		rc = gsm48_rx_gmm_status(msg);
-		break;
-	case GSM48_MT_GMM_RA_UPD_COMPL:
-		/* only in case SGSN offered new P-TMSI */
-	case GSM48_MT_GMM_ATTACH_COMPL:
-		/* only in case SGSN offered new P-TMSI */
-	case GSM48_MT_GMM_DETACH_REQ:
-	case GSM48_MT_GMM_PTMSI_REALL_COMPL:
-	case GSM48_MT_GMM_AUTH_CIPH_RESP:
-		DEBUGP(DMM, "Unimplemented GSM 04.08 GMM msg type 0x%02x\n",
-			gh->msg_type);
-		break;
-	default:
-		DEBUGP(DMM, "Unknown GSM 04.08 GMM msg type 0x%02x\n",
-			gh->msg_type);
-		break;
-	}
-
-	return rc;
-}
-
-static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr)
-{
-	uint8_t v[6];
-
-	v[0] = PDP_TYPE_ORG_IETF;
-	v[1] = PDP_TYPE_N_IETF_IPv4;
-	*(uint32_t *)(v+2) = htonl(ipaddr);
-
-	msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
-}
-
-static void msgb_put_pdp_addr_ppp(struct msgb *msg)
-{
-	uint8_t v[2];
-
-	v[0] = PDP_TYPE_ORG_ETSI;
-	v[1] = PDP_TYPE_N_ETSI_PPP;
-
-	msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
-}
-
-/* Section 9.5.2: Ativate PDP Context Accept */
-static int gsm48_tx_gsm_act_pdp_acc(struct msgb *old_msg, struct gsm48_act_pdp_ctx_req *req)
-{
-	struct gsm48_hdr *old_gh = (struct gsm48_hdr *) msgb_gmmh(old_msg);
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_act_pdp_ctx_ack *act_ack;
-	struct gsm48_hdr *gh;
-	uint8_t transaction_id = ((old_gh->proto_discr >> 4) ^ 0x8); /* flip */
-
-	DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT ACK\n");
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
-	gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
-	gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK;
-
-	/* Negotiated LLC SAPI */
-	msgb_v_put(msg, req->req_llc_sapi);
-	/* copy QoS parameters from original request */
-	msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos);
-	/* Radio priority 10.5.7.2 */
-	msgb_v_put(msg, 4);
-	/* PDP address */
-	msgb_put_pdp_addr_ipv4(msg, 0x01020304);
-	/* Optional: Protocol configuration options */
-	/* Optional: Packet Flow Identifier */
-
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Section 9.5.9: Deactivate PDP Context Accept */
-static int gsm48_tx_gsm_deact_pdp_acc(struct msgb *old_msg)
-{
-	struct gsm48_hdr *old_gh = (struct gsm48_hdr *) msgb_gmmh(old_msg);
-	struct msgb *msg = gsm48_msgb_alloc();
-	struct gsm48_hdr *gh;
-	uint8_t transaction_id = ((old_gh->proto_discr >> 4) ^ 0x8); /* flip */
-
-	DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT ACK\n");
-
-	gmm_copy_id(msg, old_msg);
-
-	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
-	gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
-	gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK;
-
-	return gsm48_gmm_sendmsg(msg, 0);
-}
-
-/* Section 9.5.1: Activate PDP Context Request */
-static int gsm48_rx_gsm_act_pdp_req(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data;
-	uint8_t *pdp_addr_lv = act_req->data;
-	uint8_t req_qos_len, req_pdpa_len;
-	uint8_t *req_qos, *req_pdpa;
-	struct tlv_parsed tp;
-
-	DEBUGP(DMM, "ACTIVATE PDP CONTEXT REQ: ");
-	req_qos_len = act_req->data[0];
-	req_qos = act_req->data + 1;	/* 10.5.6.5 */
-	req_pdpa_len = act_req->data[1 + req_qos_len];
-	req_pdpa = act_req->data + 1 + req_qos_len + 1;	/* 10.5.6.4 */
-
-	switch (req_pdpa[0] & 0xf) {
-	case 0x0:
-		DEBUGPC(DMM, "ETSI ");
-		break;
-	case 0x1:
-		DEBUGPC(DMM, "IETF ");
-		break;
-	case 0xf:
-		DEBUGPC(DMM, "Empty ");
-		break;
-	}
-
-	switch (req_pdpa[1]) {
-	case 0x21:
-		DEBUGPC(DMM, "IPv4 ");
-		if (req_pdpa_len >= 6) {
-			struct in_addr ia;
-			ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2)));
-			DEBUGPC(DMM, "%s ", inet_ntoa(ia));
-		}
-		break;
-	case 0x57:
-		DEBUGPC(DMM, "IPv6 ");
-		if (req_pdpa_len >= 18) {
-			/* FIXME: print IPv6 address */
-		}
-		break;
-	default:	
-		DEBUGPC(DMM, "0x%02x ", req_pdpa[1]);
-		break;
-	}
-
-	/* FIXME: parse TLV for AP name and protocol config options */
-	if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {}
-	if (TLVP_PRESENT(&tp, GSM48_IE_GSM_PROTO_CONF_OPT)) {}
-
-	return gsm48_tx_gsm_act_pdp_acc(msg, act_req);
-}
-
-/* Section 9.5.8: Deactivate PDP Context Request */
-static int gsm48_rx_gsm_deact_pdp_req(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-
-	DEBUGP(DMM, "DEACTIVATE PDP CONTEXT REQ (cause: %s)\n",
-		get_value_string(gsm_cause_names, gh->data[0]));
-
-	return gsm48_tx_gsm_deact_pdp_acc(msg);
-}
-
-static int gsm48_rx_gsm_status(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = msgb_l3(msg);
-
-	DEBUGP(DMM, "GPRS SM STATUS (cause: %s)\n",
-		get_value_string(gsm_cause_names, gh->data[0]));
-
-	return 0;
-}
-
-/* GPRS Session Management */
-static int gsm0408_rcv_gsm(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	int rc;
-
-	switch (gh->msg_type) {
-	case GSM48_MT_GSM_ACT_PDP_REQ:
-		rc = gsm48_rx_gsm_act_pdp_req(msg);
-		break;
-	case GSM48_MT_GSM_DEACT_PDP_REQ:
-		rc = gsm48_rx_gsm_deact_pdp_req(msg);
-	case GSM48_MT_GSM_STATUS:
-		rc = gsm48_rx_gsm_status(msg);
-		break;
-	case GSM48_MT_GSM_REQ_PDP_ACT_REJ:
-	case GSM48_MT_GSM_ACT_AA_PDP_REQ:
-	case GSM48_MT_GSM_DEACT_AA_PDP_REQ:
-		DEBUGP(DMM, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n",
-			gh->msg_type);
-		break;
-	default:
-		DEBUGP(DMM, "Unknown GSM 04.08 GSM msg type 0x%02x\n",
-			gh->msg_type);
-		break;
-
-	}
-
-	return rc;
-}
-
-/* Main entry point for incoming 04.08 GPRS messages */
-int gsm0408_gprs_rcvmsg(struct msgb *msg)
-{
-	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
-	uint8_t pdisc = gh->proto_discr & 0x0f;
-	int rc = -EINVAL;
-
-	switch (pdisc) {
-	case GSM48_PDISC_MM_GPRS:
-		rc = gsm0408_rcv_gmm(msg);
-		break;
-	case GSM48_PDISC_SM_GPRS:
-		rc = gsm0408_rcv_gsm(msg);
-		break;
-	default:
-		DEBUGP(DMM, "Unknown GSM 04.08 discriminator 0x%02x\n",
-			pdisc);
-		break;
-	}
-
-	return rc;
-}