262 lines
12 KiB
C
262 lines
12 KiB
C
/*
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* OpenGGSN - Gateway GPRS Support Node
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* Copyright (C) 2002, 2003 Mondru AB.
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*
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* The contents of this file may be used under the terms of the GNU
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* General Public License Version 2, provided that the above copyright
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* notice and this permission notice is included in all copies or
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* substantial portions of the software.
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*
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*/
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#ifndef _PDP_H
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#define _PDP_H
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struct gsn_t;
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#define PDP_MAX 1024 /* Max number of PDP contexts */
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#define PDP_MAXNSAPI 16 /* Max number of NSAPI */
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/* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
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/* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
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* by 135: QOS Profile in version 1 */
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struct sl_t {
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unsigned int l;
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char *v;
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};
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struct ul_t {
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unsigned int l;
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unsigned char *v;
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};
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struct ul16_t {
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unsigned int l;
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unsigned char v[16];
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};
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struct ul66_t {
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unsigned int l;
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unsigned char v[66];
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};
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struct ul255_t {
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unsigned int l;
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unsigned char v[255];
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};
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/* *****************************************************************
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* Information storage for each PDP context
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*
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* Information storage for each PDP context is defined in 23.060
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* section 13.3 and 03.60. Includes IMSI, MSISDN, APN, PDP-type,
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* PDP-address (IP address), sequence numbers, charging ID. For the
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* SGSN it also includes radio related mobility information.
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*
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* The following structure is a combination of the storage
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* requirements for each PDP context for the GGSN and SGSN. It
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* contains both 23.060 as well as 03.60 parameters. Information is
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* stored in the format for information elements described in 29.060
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* and 09.60.
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* 31 * 4 + 15 structs + = 120 + 15 structs ~ 2k / context
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* Structs: IP address 16+4 bytes (6), APN 255 bytes (2)
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* QOS: 255 bytes (3), msisdn 16 bytes (1),
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*
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* TODO: We need to consider who manages the pdp_t hash tables
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* Is it gtp_lib, or is it the application?
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* I suppose that it will be gtp_lib.
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* SGSN will ask gtplib for new pdp_t. Fill out the fields,
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* and pass it on to gtp_create_pdp_req.
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* GGSN will receive gtp_create_pdp_ind, create new pdp_t and
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* send responce to SGSN.
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* SGSN will receive response and gtplib will find the
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* original pdp_t corresponding to the request. This will be
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* passed on to the application.
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* Eventually the SGSN will close the connection, and the
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* pdp_t will be freed by gtplib in SGSN and GGSN
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* This means that gtplib need to have functions to
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* allocate, free, sort and find pdp_t
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* (newpdp, freepdp, getpdp)
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* Hash tables: TID, IMSI, IP etc.)
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*
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*
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* Secondary PDP Context Activation Procedure
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*
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* With GTP version 1 it is possible to establish multiple PDP
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* contexts with the same IP address. With this scheme the first
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* context is established as normal. Following contexts are
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* established by referencing one of the allready existing ones. Each
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* context is uniquely identified by IMSI and NSAPI. Each context is
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* allocated an tei_di, but they all share the same tei_c.
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*
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* For Delete PDP Context the context is referenced by tei_c and
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* nsapi. As an option it is possible to include a teardown indicater,
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* in which case all PDP contexts with the same tei_c (IP address) are
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* deleted.
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*
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* For Update PDP Context the context is normally referenced by tei_c
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* and nsapi. If moving from GTP0 to GTP1 during an update the context
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* is referenced instead by IMSI and NSAPI.
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*****************************************************************/
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struct pdp_t {
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/* Parameter determining if this PDP is in use. */
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uint8_t inuse; /* 0=free. 1=used by somebody */
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/* Pointers related to hash tables */
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struct pdp_t *tidnext;
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struct pdp_t *ipnext;
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/* Parameters shared by all PDP context belonging to the same MS */
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void *ipif; /* IP network interface */
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void *peer; /* Pointer to peer protocol */
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void *asap; /* Application specific service access point */
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uint64_t imsi; /* International Mobile Subscriber Identity. */
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struct ul16_t msisdn; /* The basic MSISDN of the MS. */
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uint8_t mnrg; /* Indicates whether the MS is marked as not reachable for PS at the HLR. (1 bit, not transmitted) */
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uint8_t cch_sub; /* The charging characteristics for the MS, e.g. normal, prepaid, flat-rate, and/or hot billing subscription. (not transmitted) */
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uint16_t traceref; /* Identifies a record or a collection of records for a particular trace. */
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uint16_t tracetype; /* Indicates the type of trace. */
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struct ul_t triggerid; /* Identifies the entity that initiated the trace. */
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struct ul_t omcid; /* Identifies the OMC that shall receive the trace record(s). */
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uint8_t rec_hlr; /* Indicates if HLR or VLR is performing database recovery. (1 bit, not transmitted) */
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/* Parameters specific to each individual PDP context */
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uint8_t pdp_id; /* Index of the PDP context. (PDP context identifier) */
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uint8_t pdp_state; /* PDP State Packet data protocol state, INACTIVE or ACTIVE. (1 bit, not transmitted) */
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/* struct ul_t pdp_type; * PDP type; e.g. PPP or IP. */
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/* struct ul_t pdp_addr; * PDP address; e.g. an IP address. */
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struct ul66_t eua; /* End user address. PDP type and address combined */
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uint8_t pdp_dyn; /* Indicates whether PDP Address is static or dynamic. (1 bit, not transmitted) */
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struct ul255_t apn_req; /* The APN requested. */
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struct ul255_t apn_sub; /* The APN received from the HLR. */
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struct ul255_t apn_use; /* The APN Network Identifier currently used. */
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uint8_t nsapi; /* Network layer Service Access Point Identifier. (4 bit) */
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uint16_t ti; /* Transaction Identifier. (4 or 12 bit) */
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uint32_t teic_own; /* (Own Tunnel Endpoint Identifier Control) */
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uint32_t teid_own; /* (Own Tunnel Endpoint Identifier Data I) */
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uint32_t teic_gn; /* Tunnel Endpoint Identifier for the Gn and Gp interfaces. (Control plane) */
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uint32_t teid_gn; /* Tunnel Endpoint Identifier for the Gn and Gp interfaces. (Data I) */
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uint32_t tei_iu; /* Tunnel Endpoint Identifier for the Iu interface. */
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uint16_t fllc; /* (Local Flow Label Control, gtp0) */
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uint16_t fllu; /* (Local Flow Label Data I, gtp0) */
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uint16_t flrc; /* (Remote gn/gp Flow Label Control, gtp0) */
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uint16_t flru; /* (Remote gn/gp Flow Label Data I, gtp0) */
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struct ul255_t tft; /* Traffic flow template. */
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/*struct ul16_t sgsnc; * The IP address of the SGSN currently serving this MS. (Control plane) */
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/*struct ul16_t sgsnu; * The IP address of the SGSN currently serving this MS. (User plane) */
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/*struct ul16_t ggsnc; * The IP address of the GGSN currently used. (Control plane) */
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/*struct ul16_t ggsnu; * The IP address of the GGSN currently used. (User plane) */
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struct ul16_t gsnlc; /* The IP address of the local GSN. (Control plane) */
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struct ul16_t gsnlu; /* The IP address of the local GSN. (User plane) */
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struct ul16_t gsnrc; /* The IP address of the remote GSN. (Control plane) */
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struct ul16_t gsnru; /* The IP address of the remote GSN. (User plane) */
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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) */
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uint8_t qos_sub0[3]; /* The quality of service profile subscribed. */
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uint8_t qos_req0[3]; /* The quality of service profile requested. */
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uint8_t qos_neg0[3]; /* The quality of service profile negotiated. */
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struct ul255_t qos_sub; /* The quality of service profile subscribed. */
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struct ul255_t qos_req; /* The quality of service profile requested. */
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struct ul255_t qos_neg; /* The quality of service profile negotiated. */
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uint8_t radio_pri; /* The RLC/MAC radio priority level for uplink user data transmission. (4 bit) */
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uint16_t flow_id; /* Packet flow identifier. */
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/* 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) */
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uint8_t sndcpd; /* SNDCP sequence number of the next downlink N-PDU to be sent to the MS. */
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uint8_t sndcpu; /* SNDCP sequence number of the next uplink N-PDU expected from the MS. */
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uint8_t rec_sgsn; /* Indicates if the SGSN is performing database recovery. (1 bit, not transmitted) */
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/* uint16_t gtpsnd; GTP-U sequence number of the next downlink N-PDU to be sent to the SGSN / received from the GGSN. */
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/* uint16_t gtpsnu; GTP-U sequence number of the next uplink N-PDU to be received from the SGSN / sent to the GGSN */
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uint16_t gtpsntx; /* GTP-U sequence number of the next downlink N-PDU to be sent (09.60 section 8.1.1.1) */
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uint16_t gtpsnrx; /* GTP-U sequence number of the next uplink N-PDU to be received (09.60 section 8.1.1.1) */
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uint8_t pdcpsndd; /* Sequence number of the next downlink in-sequence PDCP-PDU to be sent to the MS. */
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uint8_t pdcpsndu; /* Sequence number of the next uplink in-sequence PDCP-PDU expected from the MS. */
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uint32_t cid; /* Charging identifier, identifies charging records generated by SGSN and GGSN. */
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uint16_t cch_pdp; /* The charging characteristics for this PDP context, e.g. normal, prepaid, flat-rate, and/or hot billing. */
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struct ul16_t rnc_addr; /* The IP address of the RNC currently used. */
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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) */
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struct ul255_t pco_req; /* Requested packet control options. */
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struct ul255_t pco_neg; /* Negotiated packet control options. */
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uint32_t selmode; /* Selection mode. */
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struct ul255_t rattype; /* Radio Access Technology Type */
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int rattype_given; /* Radio Access Technology Type given */
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struct ul255_t userloc; /* User Location Information */
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int userloc_given; /* User Location Information given */
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struct ul255_t rai; /* Routing Area Information */
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int rai_given; /* Routing Area Information given */
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struct ul255_t mstz; /* MS Time Zone */
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int mstz_given; /* MS Time Zone given */
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struct ul255_t imeisv; /* IMEI Software Version */
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int imeisv_given; /* IMEI Software Version given */
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int norecovery_given; /* norecovery given */
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/* Additional parameters used by library */
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int version; /* Protocol version currently in use. 0 or 1 */
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uint64_t tid; /* Combination of imsi and nsapi */
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uint16_t seq; /* Sequence number of last request */
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struct sockaddr_in sa_peer; /* Address of last request */
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int fd; /* File descriptor request was received on */
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uint8_t teic_confirmed; /* 0: Not confirmed. 1: Confirmed */
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/* Parameters used for secondary activation procedure (tei data) */
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/* If (secondary == 1) then teic_own indicates linked PDP context */
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uint8_t secondary; /* 0: Primary (control). 1: Secondary (data only) */
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uint8_t nodata; /* 0: User plane PDP context. 1: No user plane */
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/* Secondary contexts of this primary context */
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uint32_t secondary_tei[PDP_MAXNSAPI];
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/* IP address used for Create and Update PDP Context Requests */
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struct in_addr hisaddr0; /* Server address */
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struct in_addr hisaddr1; /* Server address */
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/* to be used by libgtp callers/users (to attach their own private state) */
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void *priv;
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struct gsn_t *gsn;
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};
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/* functions related to pdp_t management */
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int pdp_init();
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int pdp_newpdp(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi,
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struct pdp_t *pdp_old);
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int pdp_freepdp(struct pdp_t *pdp);
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int pdp_getpdp(struct pdp_t **pdp);
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int pdp_getgtp0(struct pdp_t **pdp, uint16_t fl);
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int pdp_getgtp1(struct pdp_t **pdp, uint32_t tei);
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int pdp_getgtp1_peer_d(struct pdp_t **pdp, const struct sockaddr_in *peer, uint32_t teid_gn);
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int pdp_getimsi(struct pdp_t **pdp, uint64_t imsi, uint8_t nsapi);
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int pdp_tidhash(uint64_t tid);
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int pdp_tidset(struct pdp_t *pdp, uint64_t tid);
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int pdp_tiddel(struct pdp_t *pdp);
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int pdp_tidget(struct pdp_t **pdp, uint64_t tid);
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void pdp_set_imsi_nsapi(struct pdp_t *pdp, uint64_t teid);
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/*
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int pdp_iphash(void* ipif, struct ul66_t *eua);
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int pdp_ipset(struct pdp_t *pdp, void* ipif, struct ul66_t *eua);
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int pdp_ipdel(struct pdp_t *pdp);
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int pdp_ipget(struct pdp_t **pdp, void* ipif, struct ul66_t *eua);
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*/
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int pdp_ntoeua(struct in_addr *src, struct ul66_t *eua);
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int pdp_euaton(struct ul66_t *eua, struct in_addr *dst);
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uint64_t pdp_gettid(uint64_t imsi, uint8_t nsapi);
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#endif /* !_PDP_H */
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