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Diffstat (limited to 'gtp/pdp.h')
| -rw-r--r-- | gtp/pdp.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/gtp/pdp.h b/gtp/pdp.h new file mode 100644 index 0000000..b9ca62a --- /dev/null +++ b/gtp/pdp.h @@ -0,0 +1,203 @@ +/* + * 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 Note that version 0 6: QOS Profile was superceded * + * by 135: QOS Profile in version 1 */ + + +struct sl_t { +int l; +char *v; +}; + +struct ul_t { +int l; +unsigned char *v; +}; + +struct ul16_t { +int l;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 */ |