lynxis lazus has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ggsn/+/39032?usp=email )
Change subject: gtpie: add gtp_encaps a modern encapsulation method ......................................................................
gtpie: add gtp_encaps a modern encapsulation method
No idea why the previous ones started at the second IE. Further add more length arguments to the encapsulation method.
Change-Id: I8bb086c568e07052c52d880df06049490346e91e --- M gtp/gtpie.c M include/osmocom/gtp/gtpie.h 2 files changed, 188 insertions(+), 0 deletions(-)
Approvals: pespin: Looks good to me, but someone else must approve Jenkins Builder: Verified daniel: Looks good to me, approved
diff --git a/gtp/gtpie.c b/gtp/gtpie.c index b3f2ff7..84a3ec2 100644 --- a/gtp/gtpie.c +++ b/gtp/gtpie.c @@ -944,3 +944,189 @@ } return 0; } + +/*! Encode GTP packet payload from Array of Information Elements. + * \param[in] ie Input Array of GTPIE + * \param[in] ie_len Length of \a ie array + * \param[in] pack Pointer to caller-allocated buffer for raw GTP packet (GTPIE_MAX length) + * \param[in] pack_len Length of \a pack buffer + * \param[out] encoded_len Encoded length of \a pack in bytes + * \returns 0 on success; 2 for out-of-space + * GTP requires a certain order, the call must follow those which are defined for every message */ +int gtpie_encaps3(union gtpie_member *ies[], unsigned int ie_len, + void *pack, unsigned pack_len, unsigned *encoded_len) +{ + unsigned int i; + unsigned char *p; + unsigned char *end; + int iesize; + union gtpie_member *ie; + + *encoded_len = 0; + p = pack; + + memset(pack, 0, pack_len); + end = p + pack_len; + for (i = 0; i < ie_len; i++) { + if (!ies[i]) + continue; + ie = ies[i]; + + if (GTPIE_DEBUG) + printf + ("gtpie_encaps. Number %d, Type %d\n", + i, ie->t); + switch (ie->t) { + case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */ + case GTPIE_REORDER: + case GTPIE_MAP_CAUSE: + case GTPIE_MS_VALIDATED: + case GTPIE_RECOVERY: + case GTPIE_SELECTION_MODE: + case GTPIE_TEARDOWN: + case GTPIE_NSAPI: + case GTPIE_RANAP_CAUSE: + case GTPIE_RP_SMS: + case GTPIE_RP: + case GTPIE_MS_NOT_REACH: + case GTPIE_BCM: + iesize = 2; + break; + case GTPIE_PFI: /* TV GTPIE types with value length 2 */ + case GTPIE_CHARGING_C: + case GTPIE_TRACE_REF: + case GTPIE_TRACE_TYPE: + iesize = 3; + break; + case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */ + case GTPIE_P_TMSI_S: + iesize = 4; + break; + case GTPIE_TLLI: /* TV GTPIE types with value length 4 */ + case GTPIE_P_TMSI: + case GTPIE_TEI_DI: + case GTPIE_TEI_C: + case GTPIE_CHARGING_ID: + iesize = 5; + break; + case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */ + iesize = 6; + break; + case GTPIE_RAI: /* TV GTPIE types with value length 6 */ + iesize = 7; + break; + case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */ + iesize = 8; + break; + case GTPIE_IMSI: /* TV GTPIE types with value length 8 */ + iesize = 9; + break; + case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */ + iesize = 29; + break; + case GTPIE_EXT_HEADER_T: /* GTP extension header */ + iesize = 2 + hton8(ie->ext.l); + break; + case GTPIE_EUA: /* TLV GTPIE types with length length 2 */ + case GTPIE_MM_CONTEXT: + case GTPIE_PDP_CONTEXT: + case GTPIE_APN: + case GTPIE_PCO: + case GTPIE_GSN_ADDR: + case GTPIE_MSISDN: + case GTPIE_QOS_PROFILE: + case GTPIE_AUTH_QUINTUP: + case GTPIE_TFT: + case GTPIE_TARGET_INF: + case GTPIE_UTRAN_TRANS: + case GTPIE_RAB_SETUP: + case GTPIE_TRIGGER_ID: + case GTPIE_OMC_ID: + case GTPIE_RAN_T_CONTAIN: + case GTPIE_PDP_CTX_PRIO: + case GTPIE_ADDL_RAB_S_I: + case GTPIE_SGSN_NUMBER: + case GTPIE_COMMON_FLAGS: + case GTPIE_APN_RESTR: + case GTPIE_R_PRIO_LCS: + case GTPIE_RAT_TYPE: + case GTPIE_USER_LOC: + case GTPIE_MS_TZ: + case GTPIE_IMEI_SV: + case GTPIE_CML_CHG_I_CT: + case GTPIE_MBMS_UE_CTX: + case GTPIE_TMGI: + case GTPIE_RIM_ROUT_ADDR: + case GTPIE_MBMS_PCO: + case GTPIE_MBMS_SA: + case GTPIE_SRNC_PDCP_CTX: + case GTPIE_ADDL_TRACE: + case GTPIE_HOP_CTR: + case GTPIE_SEL_PLMN_ID: + case GTPIE_MBMS_SESS_ID: + case GTPIE_MBMS_2_3G_IND: + case GTPIE_ENH_NSAPI: + case GTPIE_MBMS_SESS_DUR: + case GTPIE_A_MBMS_TRAC_I: + case GTPIE_MBMS_S_REP_N: + case GTPIE_MBMS_TTDT: + case GTPIE_PS_HO_REQ_CTX: + case GTPIE_BSS_CONTAINER: + case GTPIE_CELL_ID: + case GTPIE_PDU_NUMBERS: + case GTPIE_BSSGP_CAUSE: + case GTPIE_RQD_MBMS_BCAP: + case GTPIE_RIM_RA_DISCR: + case GTPIE_L_SETUP_PFCS: + case GTPIE_PS_HO_XID_PAR: + case GTPIE_MS_CHG_REP_A: + case GTPIE_DIR_TUN_FLAGS: + case GTPIE_CORREL_ID: + case GTPIE_MBMS_FLOWI: + case GTPIE_MBMS_MC_DIST: + case GTPIE_MBMS_DIST_ACK: + case GTPIE_R_IRAT_HO_INF: + case GTPIE_RFSP_IDX: + case GTPIE_FQDN: + case GTPIE_E_ALL_PRIO_1: + case GTPIE_E_ALL_PRIO_2: + case GTPIE_E_CMN_FLAGS: + case GTPIE_U_CSG_INFO: + case GTPIE_CSG_I_REP_ACT: + case GTPIE_CSG_ID: + case GTPIE_CSG_MEMB_IND: + case GTPIE_AMBR: + case GTPIE_UE_NET_CAPA: + case GTPIE_UE_AMBR: + case GTPIE_APN_AMBR_NS: + case GTPIE_GGSN_BACKOFF: + case GTPIE_S_PRIO_IND: + case GTPIE_S_PRIO_IND_NS: + case GTPIE_H_BR_16MBPS_F: + case GTPIE_A_MMCTX_SRVCC: + case GTPIE_A_FLAGS_SRVCC: + case GTPIE_STN_SR: + case GTPIE_C_MSISDN: + case GTPIE_E_RANAP_CAUSE: + case GTPIE_ENODEB_ID: + case GTPIE_SEL_MODE_NS: + case GTPIE_ULI_TIMESTAMP: + case GTPIE_CHARGING_ADDR: + case GTPIE_PRIVATE: + iesize = 3 + hton16(ie->tlv.l); + break; + default: + return 2; /* We received something unknown */ + } + + if (p + iesize < end) { + memcpy(p, ie, iesize); + p += iesize; + *encoded_len += iesize; + } else + return 2; /* Out of space */ + } + + return 0; +} + diff --git a/include/osmocom/gtp/gtpie.h b/include/osmocom/gtp/gtpie.h index b6fea6e..b3e3ddf 100644 --- a/include/osmocom/gtp/gtpie.h +++ b/include/osmocom/gtp/gtpie.h @@ -321,5 +321,7 @@ extern int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len); extern int gtpie_encaps2(union gtpie_member ie[], unsigned int size, void *pack, unsigned *len); +extern int gtpie_encaps3(union gtpie_member *ie[], unsigned int ie_len, + void *pack, unsigned pack_len, unsigned *encoded_len);
#endif /* !_GTPIE_H */
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lynxis lazus