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gtp: Handle gtpv1 in gtp_update_pdp_conf() correctly 

libgtp cannot understand its own update pdp request (in gtp v1)
Only require the conditional and mandatory fields for gtpv1 and not
others.
Refer to 3GPP TS 29.060 Ch. 7.3.4
This commit is contained in:
Daniel Willmann 2016-02-04 15:38:12 +01:00 committed by Holger Hans Peter Freyther
parent 05f3ef3eb8
commit d997552d29
1 changed files with 63 additions and 57 deletions
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120
gtp/gtp.c
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@ -2187,9 +2187,8 @@ int gtp_update_pdp_conf(struct gsn_t *gsn, int version,
gsn->err_unknownpdp++;
GTP_LOGPKG(LOGL_ERROR, peer, pack, len,
"Unknown PDP context: %u\n", get_tei(pack));
if (gsn->cb_conf)
gsn->cb_conf(type, EOF, NULL, cbp);
return EOF;
pdp = NULL;
goto err_out;
}
/* Register that we have received a valid teic from GGSN */
@ -2200,23 +2199,12 @@ int gtp_update_pdp_conf(struct gsn_t *gsn, int version,
gsn->invalid++;
GTP_LOGPKG(LOGL_ERROR, peer, pack, len,
"Invalid message format\n");
if (gsn->cb_conf)
gsn->cb_conf(type, EOF, pdp, cbp);
/* if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
pdp_freepdp(pdp); */
return EOF;
goto err_out;
}
/* Extract cause value (mandatory) */
if (gtpie_gettv1(ie, GTPIE_CAUSE, 0, &cause)) {
gsn->missing++;
GTP_LOGPKG(LOGL_ERROR, peer, pack, len,
"Missing mandatory information field\n");
if (gsn->cb_conf)
gsn->cb_conf(type, EOF, pdp, cbp);
/* if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
pdp_freepdp(pdp); */
return EOF;
goto err_missing;
}
/* Extract recovery (optional) */
@ -2226,51 +2214,69 @@ int gtp_update_pdp_conf(struct gsn_t *gsn, int version,
}
/* Check all conditional information elements */
if (GTPCAUSE_ACC_REQ != cause) {
if (gsn->cb_conf)
gsn->cb_conf(type, cause, pdp, cbp);
/* if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
pdp_freepdp(pdp); */
return 0;
} else {
/* Check for missing conditionary information elements */
if (!(gtpie_exist(ie, GTPIE_QOS_PROFILE0, 0) &&
gtpie_exist(ie, GTPIE_REORDER, 0) &&
gtpie_exist(ie, GTPIE_FL_DI, 0) &&
gtpie_exist(ie, GTPIE_FL_C, 0) &&
gtpie_exist(ie, GTPIE_CHARGING_ID, 0) &&
gtpie_exist(ie, GTPIE_EUA, 0) &&
gtpie_exist(ie, GTPIE_GSN_ADDR, 0) &&
gtpie_exist(ie, GTPIE_GSN_ADDR, 1))) {
gsn->missing++;
GTP_LOGPKG(LOGL_ERROR, peer, pack,
len,
"Missing conditional information field\n");
if (gsn->cb_conf)
gsn->cb_conf(type, EOF, pdp, cbp);
/* if (gsn->cb_delete_context) gsn->cb_delete_context(pdp);
pdp_freepdp(pdp); */
return EOF;
/* TODO: This does not handle GGSN-initiated update responses */
if (GTPCAUSE_ACC_REQ == cause) {
if (version == 0) {
if (gtpie_gettv0(ie, GTPIE_QOS_PROFILE0, 0,
&pdp->qos_neg0,
sizeof(pdp->qos_neg0))) {
goto err_missing;
}
if (gtpie_gettv2(ie, GTPIE_FL_DI, 0, &pdp->flru)) {
goto err_missing;
}
if (gtpie_gettv2(ie, GTPIE_FL_C, 0, &pdp->flrc)) {
goto err_missing;
}
}
/* Update pdp with new values */
gtpie_gettv0(ie, GTPIE_QOS_PROFILE0, 0,
pdp->qos_neg0, sizeof(pdp->qos_neg0));
gtpie_gettv1(ie, GTPIE_REORDER, 0, &pdp->reorder);
gtpie_gettv2(ie, GTPIE_FL_DI, 0, &pdp->flru);
gtpie_gettv2(ie, GTPIE_FL_C, 0, &pdp->flrc);
gtpie_gettv4(ie, GTPIE_CHARGING_ID, 0, &pdp->cid);
gtpie_gettlv(ie, GTPIE_EUA, 0, &pdp->eua.l,
&pdp->eua.v, sizeof(pdp->eua.v));
gtpie_gettlv(ie, GTPIE_GSN_ADDR, 0, &pdp->gsnrc.l,
&pdp->gsnrc.v, sizeof(pdp->gsnrc.v));
gtpie_gettlv(ie, GTPIE_GSN_ADDR, 1, &pdp->gsnru.l,
&pdp->gsnru.v, sizeof(pdp->gsnru.v));
if (version == 1) {
if (gtpie_gettv4(ie, GTPIE_TEI_DI, 0, &pdp->teid_gn)) {
goto err_missing;
}
if (gsn->cb_conf)
gsn->cb_conf(type, cause, pdp, cbp);
return 0; /* Succes */
if (gtpie_gettv4(ie, GTPIE_TEI_C, 0, &pdp->teic_gn)) {
goto err_missing;
}
}
if (gtpie_gettv4(ie, GTPIE_CHARGING_ID, 0, &pdp->cid)) {
goto err_missing;
}
if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 0, &pdp->gsnrc.l,
&pdp->gsnrc.v, sizeof(pdp->gsnrc.v))) {
goto err_missing;
}
if (gtpie_gettlv(ie, GTPIE_GSN_ADDR, 1, &pdp->gsnru.l,
&pdp->gsnru.v, sizeof(pdp->gsnru.v))) {
goto err_missing;
}
if (version == 1) {
if (gtpie_gettlv
(ie, GTPIE_QOS_PROFILE, 0, &pdp->qos_neg.l,
&pdp->qos_neg.v, sizeof(pdp->qos_neg.v))) {
goto err_missing;
}
}
}
if (gsn->cb_conf)
gsn->cb_conf(type, cause, pdp, cbp);
return 0; /* Succes */
err_missing:
gsn->missing++;
GTP_LOGPKG(LOGL_ERROR, peer, pack, len,
"Missing information field\n");
err_out:
if (gsn->cb_conf)
gsn->cb_conf(type, EOF, pdp, cbp);
return EOF;
}
/* API: Send Delete PDP Context Request */