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osmo-ggsn/gtp/gtpie.c

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/*
* OsmoGGSN - 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.
*
*/
/*
* gtpie.c: Contains functions to encapsulate and decapsulate GTP
* information elements
*
*
* Encapsulation
* - gtpie_tlv, gtpie_tv0, gtpie_tv1, gtpie_tv2 ... Adds information
* elements to a buffer.
*
* Decapsulation
* - gtpie_decaps: Returns array with pointers to information elements.
* - getie_getie: Returns the pointer of a particular element.
* - gtpie_gettlv: Copies tlv information element. Return 0 on success.
* - gtpie_gettv: Copies tv information element. Return 0 on success.
*
*/
#include <../config.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <string.h>
#include "gtpie.h"
/*! Encode a TLV type Information Element.
* \param[inout] p Pointer to output packet to which IE is appended
* \param[inout] length Up to which byte length is \a p used/filled
* \param[in] size Total size of \a p in bytes
* \param[in] t Tag / Information Element Identifier
* \param[in] l Length of value \a v in bytes
* \param[in] v Pointer to input value
* \returns 0 on success, 1 on error */
int gtpie_tlv(void *p, unsigned int *length, unsigned int size, uint8_t t,
int l, const void *v)
{
if ((*length + 3 + l) >= size)
return 1;
((union gtpie_member *)(p + *length))->tlv.t = hton8(t);
((union gtpie_member *)(p + *length))->tlv.l = hton16(l);
memcpy((void *)(p + *length + 3), v, l);
*length += 3 + l;
return 0;
}
/*! Encode a TV0 (Tag + value) type Information Element.
* \param[inout] p Pointer to output packet to which IE is appended
* \param[inout] length Up to which byte length is \a p used/filled
* \param[in] size Total size of \a p in bytes
* \param[in] t Tag / Information Element Identifier
* \param[in] l Length of value \a v in bytes
* \param[in] v Pointer to input value
* \returns 0 on success, 1 on error */
int gtpie_tv0(void *p, unsigned int *length, unsigned int size, uint8_t t,
int l, const uint8_t * v)
{
if ((*length + 1 + l) >= size)
return 1;
((union gtpie_member *)(p + *length))->tv0.t = hton8(t);
memcpy((void *)(p + *length + 1), v, l);
*length += 1 + l;
return 0;
}
/*! Encode a TV1 (Tag + 8bit value) type Information Element.
* \param[inout] p Pointer to output packet to which IE is appended
* \param[inout] length Up to which byte length is \a p used/filled
* \param[in] size Total size of \a p in bytes
* \param[in] t Tag / Information Element Identifier
* \param[in] v Input value
* \returns 0 on success, 1 on error */
int gtpie_tv1(void *p, unsigned int *length, unsigned int size, uint8_t t,
uint8_t v)
{
if ((*length + 2) >= size)
return 1;
((union gtpie_member *)(p + *length))->tv1.t = hton8(t);
((union gtpie_member *)(p + *length))->tv1.v = hton8(v);
*length += 2;
return 0;
}
/*! Encode a TV2 (Tag + 16bit value) type Information Element.
* \param[inout] p Pointer to output packet to which IE is appended
* \param[inout] length Up to which byte length is \a p used/filled
* \param[in] size Total size of \a p in bytes
* \param[in] t Tag / Information Element Identifier
* \param[in] v Input value
* \returns 0 on success, 1 on error */
int gtpie_tv2(void *p, unsigned int *length, unsigned int size, uint8_t t,
uint16_t v)
{
if ((*length + 3) >= size)
return 1;
((union gtpie_member *)(p + *length))->tv2.t = hton8(t);
((union gtpie_member *)(p + *length))->tv2.v = hton16(v);
*length += 3;
return 0;
}
/*! Encode a TV4 (Tag + 32bit value) type Information Element.
* \param[inout] p Pointer to output packet to which IE is appended
* \param[inout] length Up to which byte length is \a p used/filled
* \param[in] size Total size of \a p in bytes
* \param[in] t Tag / Information Element Identifier
* \param[in] v Input value
* \returns 0 on success, 1 on error */
int gtpie_tv4(void *p, unsigned int *length, unsigned int size, uint8_t t,
uint32_t v)
{
if ((*length + 5) >= size)
return 1;
((union gtpie_member *)(p + *length))->tv4.t = hton8(t);
((union gtpie_member *)(p + *length))->tv4.v = hton32(v);
*length += 5;
return 0;
}
/*! Encode a TV8 (Tag + 64bit value) type Information Element.
* \param[inout] p Pointer to output packet to which IE is appended
* \param[inout] length Up to which byte length is \a p used/filled
* \param[in] size Total size of \a p in bytes
* \param[in] t Tag / Information Element Identifier
* \param[in] v Input value
* \returns 0 on success, 1 on error */
int gtpie_tv8(void *p, unsigned int *length, unsigned int size, uint8_t t,
uint64_t v)
{
if ((*length + 9) >= size)
return 1;
((union gtpie_member *)(p + *length))->tv8.t = hton8(t);
((union gtpie_member *)(p + *length))->tv8.v = hton64(v);
*length += 9;
return 0;
}
/*! Obtain a GTP IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \returns index into \a ie on success; -1 if not found */
int gtpie_getie(union gtpie_member *ie[], int type, int instance)
{
int j;
for (j = 0; j < GTPIE_SIZE; j++) {
if ((ie[j] != 0) && (ie[j]->t == type)) {
if (instance-- == 0)
return j;
}
}
return -1;
}
/*! Determine if IE for a given tag/IEI exists in a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \returns 1 if IEI instance present in \a ie; 0 if not */
int gtpie_exist(union gtpie_member *ie[], int type, int instance)
{
int j;
for (j = 0; j < GTPIE_SIZE; j++) {
if ((ie[j] != 0) && (ie[j]->t == type)) {
if (instance-- == 0)
return 1;
}
}
return 0;
}
/*! Obtain Value of TLV-type IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \param[out] length Length of IE
* \param[inout] dst Caller-allocated buffer where to store value
* \param[in] size Size of \a dst in bytes
* \returns 0 on sucess; EOF in case value is larger than \a size */
int gtpie_gettlv(union gtpie_member *ie[], int type, int instance,
unsigned int *length, void *dst, unsigned int size)
{
int ien;
ien = gtpie_getie(ie, type, instance);
if (ien >= 0) {
*length = ntoh16(ie[ien]->tlv.l);
if (*length <= size)
memcpy(dst, ie[ien]->tlv.v, *length);
else
return EOF;
}
return 0;
}
/*! Obtain Value of TV0-type IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \param[inout] dst Caller-allocated buffer where to store value
* \param[in] size Size of value in bytes
* \returns 0 on sucess; EOF in case IE not found */
int gtpie_gettv0(union gtpie_member *ie[], int type, int instance,
void *dst, unsigned int size)
{
int ien;
ien = gtpie_getie(ie, type, instance);
if (ien >= 0)
memcpy(dst, ie[ien]->tv0.v, size);
else
return EOF;
return 0;
}
/*! Obtain Value of TV1-type IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \param[inout] dst Caller-allocated buffer where to store value
* \returns 0 on sucess; EOF in case IE not found */
int gtpie_gettv1(union gtpie_member *ie[], int type, int instance,
uint8_t * dst)
{
int ien;
ien = gtpie_getie(ie, type, instance);
if (ien >= 0)
*dst = ntoh8(ie[ien]->tv1.v);
else
return EOF;
return 0;
}
/*! Obtain Value of TV2-type IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \param[inout] dst Caller-allocated buffer where to store value
* \returns 0 on sucess; EOF in case IE not found */
int gtpie_gettv2(union gtpie_member *ie[], int type, int instance,
uint16_t * dst)
{
int ien;
ien = gtpie_getie(ie, type, instance);
if (ien >= 0)
*dst = ntoh16(ie[ien]->tv2.v);
else
return EOF;
return 0;
}
/*! Obtain Value of TV4-type IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \param[inout] dst Caller-allocated buffer where to store value
* \returns 0 on sucess; EOF in case IE not found */
int gtpie_gettv4(union gtpie_member *ie[], int type, int instance,
uint32_t * dst)
{
int ien;
ien = gtpie_getie(ie, type, instance);
if (ien >= 0)
*dst = ntoh32(ie[ien]->tv4.v);
else
return EOF;
return 0;
}
/*! Obtain Value of TV8-type IE for a given tag/IEI from a list/array.
* \param[in] ie Array of GTPIE
* \param[in] type Tag/IEI for which we're looking
* \param[in] instance Instance (number of occurence) of this IEI
* \param[inout] dst Caller-allocated buffer where to store value
* \returns 0 on sucess; EOF in case IE not found */
int gtpie_gettv8(union gtpie_member *ie[], int type, int instance,
uint64_t * dst)
{
int ien;
ien = gtpie_getie(ie, type, instance);
if (ien >= 0)
*dst = ntoh64(ie[ien]->tv8.v);
else
return EOF;
return 0;
}
/*! Parse an incoming GTP packet into its Information Elements.
* \param[out] ie Caller-allocated Array of GTPIE
* \param[in] version GTP protocol version
* \param[in] pack Pointer to raw GTP packet (payload part)
* \param[in] len Length of \a pack in bytes
* \returns 0 on sucess; EOF in case IE not found */
int gtpie_decaps(union gtpie_member *ie[], int version, const void *pack,
unsigned len)
{
int i;
int j = 0;
const unsigned char *p;
const unsigned char *end;
end = (unsigned char *)pack + len;
p = pack;
memset(ie, 0, sizeof(union gtpie_member *) * GTPIE_SIZE);
while ((p < end) && (j < GTPIE_SIZE)) {
if (GTPIE_DEBUG) {
printf("The packet looks like this:\n");
for (i = 0; i < (end - p); i++) {
printf("%02x ",
(unsigned char)*(char *)(p + i));
if (!((i + 1) % 16))
printf("\n");
};
printf("\n");
}
switch (*p) {
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:
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE TV1 found. Type %d, value %d\n",
ie[j]->tv1.t, ie[j]->tv1.v);
p += 1 + 1;
j++;
}
break;
case GTPIE_FL_DI: /* TV GTPIE types with value length 2 or 4 */
case GTPIE_FL_C:
if (version != 0) {
if (j < GTPIE_SIZE) { /* GTPIE_TEI_DI & GTPIE_TEI_C with length 4 */
/* case GTPIE_TEI_DI: gtp1 */
/* case GTPIE_TEI_C: gtp1 */
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE TV 4 found. Type %d, value %d\n",
ie[j]->tv4.t,
ie[j]->tv4.v);
p += 1 + 4;
j++;
}
break;
}
case GTPIE_PFI: /* TV GTPIE types with value length 2 */
case GTPIE_CHARGING_C:
case GTPIE_TRACE_REF:
case GTPIE_TRACE_TYPE:
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE TV2 found. Type %d, value %d\n",
ie[j]->tv2.t, ie[j]->tv2.v);
p += 1 + 2;
j++;
}
break;
case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
case GTPIE_P_TMSI_S:
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE TV 3 found. Type %d, value %d, %d, %d\n",
ie[j]->tv0.t, ie[j]->tv0.v[0],
ie[j]->tv0.v[1], ie[j]->tv0.v[2]);
p += 1 + 3;
j++;
}
break;
case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
case GTPIE_P_TMSI:
case GTPIE_CHARGING_ID:
/* case GTPIE_TEI_DI: Handled by GTPIE_FL_DI */
/* case GTPIE_TEI_C: Handled by GTPIE_FL_DI */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE TV 4 found. Type %d, value %d\n",
ie[j]->tv4.t, ie[j]->tv4.v);
p += 1 + 4;
j++;
}
break;
case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf("GTPIE TV 5 found. Type %d\n",
ie[j]->tv0.t);
p += 1 + 5;
j++;
}
break;
case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf("GTPIE TV 7 found. Type %d\n",
ie[j]->tv0.t);
p += 1 + 7;
j++;
}
break;
case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE_IMSI - GTPIE TV 8 found. Type %d, value 0x%llx\n",
ie[j]->tv0.t, ie[j]->tv8.v);
p += 1 + 8;
j++;
}
break;
case GTPIE_RAI: /* TV GTPIE types with value length 6 */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE_RAI - GTPIE TV 6 found. Type %d, value 0x%llx\n",
ie[j]->tv0.t, ie[j]->tv8.v);
p += 1 + 6;
j++;
}
break;
case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf("GTPIE TV 28 found. Type %d\n",
ie[j]->tv0.t);
p += 1 + 28;
j++;
}
break;
case GTPIE_EXT_HEADER_T: /* GTP extension header */
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf
("GTPIE GTP extension header found. Type %d\n",
ie[j]->ext.t);
p += 2 + ntoh8(ie[j]->ext.l);
j++;
}
break;
case GTPIE_EUA: /* TLV GTPIE types with variable length */
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:
if (j < GTPIE_SIZE) {
ie[j] = (union gtpie_member *)p;
if (GTPIE_DEBUG)
printf("GTPIE TLV found. Type %d\n",
ie[j]->tlv.t);
p += 3 + ntoh16(ie[j]->tlv.l);
j++;
}
break;
default:
if (GTPIE_DEBUG)
printf("GTPIE something unknown. Type %d\n",
*p);
return EOF; /* We received something unknown */
}
}
if (p == end) {
if (GTPIE_DEBUG)
printf("GTPIE normal return. %lx %lx\n",
(unsigned long)p, (unsigned long)end);
return 0; /* We landed at the end of the packet: OK */
} else if (!(j < GTPIE_SIZE)) {
if (GTPIE_DEBUG)
printf("GTPIE too many elements.\n");
return EOF; /* We received too many information elements */
} else {
if (GTPIE_DEBUG)
printf("GTPIE exceeded end of packet. %lx %lx\n",
(unsigned long)p, (unsigned long)end);
return EOF; /* We exceeded the end of the packet: Error */
}
}
/*! Encode GTP packet payload from Array of Information Elements.
* \param[out] ie Input Array of GTPIE
* \param[out] pack Pointer to caller-allocated buffer for raw GTP packet (GTPIE_MAX length)
* \param[out] len Encoded length of \a pack in bytes
* \returns 0 on sucess; 2 for out-of-space */
int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
{
int i;
unsigned char *p;
unsigned char *end;
int iesize;
p = pack;
memset(pack, 0, GTPIE_MAX);
end = p + GTPIE_MAX;
for (i = 1; i < GTPIE_SIZE; i++)
if (ie[i] != 0) {
if (GTPIE_DEBUG)
printf("gtpie_encaps. Type %d\n", i);
switch (i) {
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_FL_DI: /* TV GTPIE types with value length 2 */
case GTPIE_FL_C:
case GTPIE_PFI:
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: only in gtp1 */
/* case GTPIE_TEI_C: only in gtp1 */
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[i]->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[i]->tlv.l);
break;
default:
return 2; /* We received something unknown */
}
if (p + iesize < end) {
memcpy(p, ie[i], iesize);
p += iesize;
*len += iesize;
} else
return 2; /* Out of space */
}
return 0;
}
/*! Encode GTP packet payload from Array of Information Elements.
* \param[out] ie Input Array of GTPIE
* \param[in] size Size of ?
* \param[out] pack Pointer to caller-allocated buffer for raw GTP packet (GTPIE_MAX length)
* \param[out] len Encoded length of \a pack in bytes
* \returns 0 on sucess; 2 for out-of-space */
int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
void *pack, unsigned *len)
{
unsigned int i, j;
unsigned char *p;
unsigned char *end;
int iesize;
p = pack;
memset(pack, 0, GTPIE_MAX);
end = p + GTPIE_MAX;
for (j = 0; j < GTPIE_SIZE; j++)
for (i = 0; i < size; i++)
if (ie[i].t == j) {
if (GTPIE_DEBUG)
printf
("gtpie_encaps. Number %d, Type %d\n",
i, ie[i].t);
switch (ie[i].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[i].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[i].tlv.l);
break;
default:
return 2; /* We received something unknown */
}
if (p + iesize < end) {
memcpy(p, &ie[i], iesize);
p += iesize;
*len += iesize;
} else
return 2; /* Out of space */
}
return 0;
}
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