Initial revision
diff --git a/gtp/pdp.h b/gtp/pdp.h
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+++ b/gtp/pdp.h
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+/*
+ * OpenGGSN - Gateway GPRS Support Node
+ * Copyright (C) 2002 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+#ifndef _PDP_H
+#define _PDP_H
+
+#define PDP_MAX 1024 /* Max number of PDP contexts */
+
+#define PDP_DEBUG 0 /* Print debug information */
+
+/* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
+/* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
+ * by 135: QOS Profile in version 1 */
+
+
+struct sl_t {
+int l;
+char *v;
+};
+
+struct ul_t {
+int l;
+unsigned char *v;
+};
+
+struct ul16_t {
+int l;
+unsigned char v[16];
+};
+
+struct ul66_t {
+int l;
+unsigned char v[66];
+};
+
+struct ul255_t {
+int l;
+unsigned char v[255];
+};
+
+
+/* ***********************************************************
+ * Information storage for each PDP context
+ *
+ * Information storage for each PDP context is defined in
+ * 23.060 section 13.3 and 03.60. Includes IMSI, MSISDN, APN,
+ * PDP-type, PDP-address (IP address), sequence numbers, charging ID.
+ * For the SGSN it also includes radio related mobility
+ * information.
+ * The following structure is a combination of the storage
+ * requirements for each PDP context for the GGSN and SGSN.
+ * It contains both 23.060 as well as 03.60 parameters.
+ * Information is stored in the format for information elements
+ * described in 29.060 and 09.60.
+ * 31 * 4 + 15 structs + = 120 + 15 structs ~ 2k / context
+ * Structs: IP address 16+4 bytes (6), APN 255 bytes (2)
+ * QOS: 255 bytes (3), msisdn 16 bytes (1),
+ *
+ * TODO: We need to consider who manages the pdp_t hash tables
+ * Is it gtp_lib, or is it the application?
+ * I suppose that it will be gtp_lib.
+ * SGSN will ask gtplib for new pdp_t. Fill out the fields,
+ * and pass it on to gtp_create_pdp_req.
+ * GGSN will receive gtp_create_pdp_ind, create new pdp_t and
+ * send responce to SGSN.
+ * SGSN will receive response and gtplib will find the
+ * original pdp_t corresponding to the request. This will be
+ * passed on to the application.
+ * Eventually the SGSN will close the connection, and the
+ * pdp_t will be freed by gtplib in SGSN and GGSN
+ * This means that gtplib need to have functions to
+ * allocate, free, sort and find pdp_t
+ * (newpdp, freepdp, getpdp)
+ * Hash tables: TID, IMSI, IP etc.)
+ *************************************************************/
+
+struct pdp_t {
+ /* Parameter determining if this PDP is in use. */
+ uint8_t inuse; /* 0=free. 1=used by somebody */
+
+ /* Pointers related to hash tables */
+ struct pdp_t *tidnext;
+ struct pdp_t *ipnext;
+
+ /* Parameters shared by all PDP context belonging to the same MS */
+
+ void *ipif; /* IP network interface */
+ void *asap; /* Application specific service access point */
+
+ uint64_t imsi; /* International Mobile Subscriber Identity.*/
+ struct ul16_t msisdn; /* The basic MSISDN of the MS. */
+ uint8_t mnrg; /* Indicates whether the MS is marked as not reachable for PS at the HLR. (1 bit, not transmitted) */
+ uint8_t cch_sub; /* The charging characteristics for the MS, e.g. normal, prepaid, flat-rate, and/or hot billing subscription. (not transmitted) */
+ uint16_t traceref; /* Identifies a record or a collection of records for a particular trace. */
+ uint16_t tracetype;/* Indicates the type of trace. */
+ struct ul_t triggerid;/* Identifies the entity that initiated the trace. */
+ struct ul_t omcid; /* Identifies the OMC that shall receive the trace record(s). */
+ uint8_t rec_hlr; /* Indicates if HLR or VLR is performing database recovery. (1 bit, not transmitted) */
+
+ /* Parameters specific to each individual PDP context */
+
+ uint8_t pdp_id; /* Index of the PDP context. (PDP context identifier) */
+ uint8_t pdp_state;/* PDP State Packet data protocol state, INACTIVE or ACTIVE. (1 bit, not transmitted) */
+ /* struct ul_t pdp_type; * PDP type; e.g. PPP or IP. */
+ /* struct ul_t pdp_addr; * PDP address; e.g. an IP address. */
+ struct ul66_t eua; /* End user address. PDP type and address combined */
+ uint8_t pdp_dyn; /* Indicates whether PDP Address is static or dynamic. (1 bit, not transmitted) */
+ struct ul255_t apn_req;/* The APN requested. */
+ struct ul255_t apn_sub;/* The APN received from the HLR. */
+ struct ul255_t apn_use;/* The APN Network Identifier currently used. */
+ uint8_t nsapi; /* Network layer Service Access Point Identifier. (4 bit) */
+ uint16_t ti; /* Transaction Identifier. (4 or 12 bit) */
+
+ uint32_t teic_own; /* (Own Tunnel Endpoint Identifier Control) */
+ uint32_t teid_own; /* (Own Tunnel Endpoint Identifier Data I) */
+ uint32_t teic_gn; /* Tunnel Endpoint Identifier for the Gn and Gp interfaces. (Control plane) */
+ uint32_t teid_gn; /* Tunnel Endpoint Identifier for the Gn and Gp interfaces. (Data I) */
+ uint32_t tei_iu; /* Tunnel Endpoint Identifier for the Iu interface. */
+
+ uint16_t fllc; /* (Local Flow Label Control, gtp0) */
+ uint16_t fllu; /* (Local Flow Label Data I, gtp0) */
+ uint16_t flrc; /* (Remote gn/gp Flow Label Control, gtp0) */
+ uint16_t flru; /* (Remote gn/gp Flow Label Data I, gtp0) */
+
+ struct ul_t tft; /* Traffic flow template. */
+ /*struct ul16_t sgsnc; * The IP address of the SGSN currently serving this MS. (Control plane) */
+ /*struct ul16_t sgsnu; * The IP address of the SGSN currently serving this MS. (User plane) */
+ /*struct ul16_t ggsnc; * The IP address of the GGSN currently used. (Control plane) */
+ /*struct ul16_t ggsnu; * The IP address of the GGSN currently used. (User plane) */
+
+ struct ul16_t gsnlc; /* The IP address of the local GSN. (Control plane) */
+ struct ul16_t gsnlu; /* The IP address of the local GSN. (User plane) */
+ struct ul16_t gsnrc; /* The IP address of the remote GSN. (Control plane) */
+ struct ul16_t gsnru; /* The IP address of the remote GSN. (User plane) */
+
+ uint8_t vplmn_allow; /* Specifies whether the MS is allowed to use the APN in the domain of the HPLMN only, or additionally the APN in the domain of the VPLMN. (1 bit) */
+ uint8_t qos_sub0[3]; /* The quality of service profile subscribed. */
+ uint8_t qos_req0[3]; /* The quality of service profile requested. */
+ uint8_t qos_neg0[3]; /* The quality of service profile negotiated. */
+ struct ul255_t qos_sub; /* The quality of service profile subscribed. */
+ struct ul255_t qos_req; /* The quality of service profile requested. */
+ struct ul255_t qos_neg; /* The quality of service profile negotiated. */
+ uint8_t radio_pri;/* The RLC/MAC radio priority level for uplink user data transmission. (4 bit) */
+ uint16_t flow_id; /* Packet flow identifier. */
+ /* struct ul_t bssqos_neg; * The aggregate BSS quality of service profile negotiated for the packet flow that this PDP context belongs to. (NOT GTP)*/
+ uint8_t sndcpd; /* SNDCP sequence number of the next downlink N-PDU to be sent to the MS. */
+ uint8_t sndcpu; /* SNDCP sequence number of the next uplink N-PDU expected from the MS. */
+ uint8_t rec_sgsn; /* Indicates if the SGSN is performing database recovery. (1 bit, not transmitted) */
+/* uint16_t gtpsnd; GTP-U sequence number of the next downlink N-PDU to be sent to the SGSN / received from the GGSN. */
+/* uint16_t gtpsnu; GTP-U sequence number of the next uplink N-PDU to be received from the SGSN / sent to the GGSN */
+ uint16_t gtpsntx; /* GTP-U sequence number of the next downlink N-PDU to be sent (09.60 section 8.1.1.1) */
+ uint16_t gtpsnrx; /* GTP-U sequence number of the next uplink N-PDU to be received (09.60 section 8.1.1.1) */
+ uint8_t pdcpsndd; /* Sequence number of the next downlink in-sequence PDCP-PDU to be sent to the MS. */
+ uint8_t pdcpsndu; /* Sequence number of the next uplink in-sequence PDCP-PDU expected from the MS. */
+ uint32_t cid; /* Charging identifier, identifies charging records generated by SGSN and GGSN. */
+ uint16_t cch_pdp; /* The charging characteristics for this PDP context, e.g. normal, prepaid, flat-rate, and/or hot billing. */
+ struct ul16_t rnc_addr;/* The IP address of the RNC currently used. */
+ uint8_t reorder; /* Specifies whether the GGSN shall reorder N-PDUs received from the SGSN / Specifies whether the SGSN shall reorder N-PDUs before delivering the N-PSUs to the MS. (1 bit) */
+ struct ul255_t pco_req; /* Requested packet control options. */
+ struct ul255_t pco_neg; /* Negotiated packet control options. */
+ uint32_t selmode; /* Selection mode. */
+ uint64_t tid; /* (Combination of imsi and nsapi) */
+};
+
+
+/* functions related to pdp_t management */
+int pdp_init();
+int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
+ struct pdp_t *pdp_old);
+int pdp_freepdp(struct pdp_t *pdp);
+int pdp_getpdp(struct pdp_t **pdp);
+
+int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl);
+int pdp_getgtp1(struct pdp_t **pdp, uint32_t teid);
+
+int pdp_tidhash(uint64_t tid);
+int pdp_tidset(struct pdp_t *pdp, uint64_t tid);
+int pdp_tiddel(struct pdp_t *pdp);
+int pdp_tidget(struct pdp_t **pdp, uint64_t tid);
+
+int pdp_iphash(void* ipif, struct ul66_t *eua);
+int pdp_ipset(struct pdp_t *pdp, void* ipif, struct ul66_t *eua);
+int pdp_ipdel(struct pdp_t *pdp);
+int pdp_ipget(struct pdp_t **pdp, void* ipif, struct ul66_t *eua);
+
+int pdp_ntoeua(struct in_addr *src, struct ul66_t *eua);
+uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi);
+int ulcpy(void* dst, void* src, size_t size);
+
+#endif /* !_PDP_H */