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Harald Welte gerrit-no-reply at lists.osmocom.orgHarald Welte has submitted this change and it was merged. ( https://gerrit.osmocom.org/c/osmo-ggsn/+/14011 )
Change subject: ggsn: Use gtp_delete_context_req2() everywhere
......................................................................
ggsn: Use gtp_delete_context_req2() everywhere
Replace calls to gtp_delete_context_req() with
gtp_delete_context_req2().
Related: OS#2741
Change-Id: Iecc8c5ac45207e7e20129559c4ac7f3c67dfb36a
---
M ggsn/ggsn.c
M gtp/gtp.c
M sgsnemu/sgsnemu.c
3 files changed, 40 insertions(+), 7 deletions(-)
Approvals:
Jenkins Builder: Verified
Harald Welte: Looks good to me, approved
diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index 9b45109..c559923 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -107,7 +107,12 @@
if (!pdp)
continue;
LOGPPDP(LOGL_DEBUG, pdp, "Sending DELETE PDP CTX due to shutdown\n");
- gtp_delete_context_req(pdp->gsn, pdp, NULL, 1);
+ gtp_delete_context_req2(pdp->gsn, pdp, NULL, 1);
+ /* We have nothing more to do with pdp ctx, free it. Upon cb_delete_context
+ called during this call we'll clean up ggsn related stuff attached to this
+ pdp context. After this call, ippool member is cleared so
+ data is no longer valid and should not be accessed anymore. */
+ gtp_freepdp_teardown(pdp->gsn, pdp);
}
}
@@ -980,6 +985,32 @@
}
}
+/* libgtp callback for confirmations */
+static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp)
+{
+ int rc = 0;
+
+ if (cause == EOF)
+ LOGP(DGGSN, LOGL_NOTICE, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n",
+ type, pdp, cbp);
+
+ switch (type) {
+ case GTP_DELETE_PDP_REQ:
+ /* Remark: We actually never reach this path nowadays because
+ only place where we call gtp_delete_context_req2() is during
+ apn_stop()->pool_close_all_pdp() path, and in that case we
+ free all pdp contexts immediatelly without waiting for
+ confirmation since we want to tear down the whole APN
+ anyways. As a result, DeleteCtxResponse will never reach here
+ since it will be dropped at some point in lower layers in the
+ Rx path. This code is nevertheless left here in order to ease
+ future developent and avoid possible future memleaks once more
+ scenarios where GGSN sends a DeleteCtxRequest are introduced. */
+ if (pdp)
+ rc = pdp_freepdp(pdp);
+ }
+ return rc;
+}
/* Start a given GGSN */
int ggsn_start(struct ggsn_ctx *ggsn)
@@ -1027,6 +1058,7 @@
gtp_set_cb_data_ind(ggsn->gsn, encaps_tun);
gtp_set_cb_delete_context(ggsn->gsn, delete_context);
gtp_set_cb_create_context_ind(ggsn->gsn, create_context_ind);
+ gtp_set_cb_conf(ggsn->gsn, cb_conf);
LOGPGGSN(LOGL_NOTICE, ggsn, "Successfully started\n");
ggsn->started = true;
diff --git a/gtp/gtp.c b/gtp/gtp.c
index 9ae208a..2b14026 100644
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
@@ -2434,7 +2434,9 @@
return 0;
}
-/* API: Send Delete PDP Context Request. PDP CTX shall be free'd by user at cb_conf(GTP_DELETE_PDP_RSP) */
+/* API: Send Delete PDP Context Request. PDP CTX shall be free'd by user at any
+ point in time later than this function through a call to pdp_freepdp(pdp), but
+ it must be freed no later than during cb_conf(GTP_DELETE_PDP_REQ, pdp) */
int gtp_delete_context_req2(struct gsn_t *gsn, struct pdp_t *pdp, void *cbp,
int teardown)
{
@@ -2643,7 +2645,7 @@
if (pdp_getgtp1(&pdp, get_tei(pack))) {
gsn->err_unknownpdp++;
GTP_LOGPKG(LOGL_NOTICE, peer, pack, len,
- "Unknown PDP context: %u (expected if gtp_delete_context_req is used)\n",
+ "Unknown PDP context: %u (expected if gtp_delete_context_req is used or pdp ctx was freed manually before response)\n",
get_tei(pack));
if (gsn->cb_conf)
gsn->cb_conf(type, EOF, NULL, cbp);
diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c
index a2220f0..225dc59 100644
--- a/sgsnemu/sgsnemu.c
+++ b/sgsnemu/sgsnemu.c
@@ -1474,6 +1474,8 @@
{
printf("Received delete PDP context response. Cause value: %d\n",
cause);
+ if (pdp)
+ pdp_freepdp(pdp);
return 0;
}
@@ -1508,8 +1510,6 @@
case GTP_CREATE_PDP_REQ:
return create_pdp_conf(pdp, cbp, cause);
case GTP_DELETE_PDP_REQ:
- if (cause != 128)
- return 0; /* Request not accepted. We don't care */
return delete_pdp_conf(pdp, cause);
default:
return 0;
@@ -1756,8 +1756,7 @@
for (n = 0; n < options.contexts; n++) {
/* Delete context */
printf("Disconnecting PDP context #%d\n", n);
- gtp_delete_context_req(gsn, iparr[n].pdp, NULL,
- 1);
+ gtp_delete_context_req2(gsn, iparr[n].pdp, NULL, 1);
if ((options.pinghost.s_addr != 0)
&& ntransmitted)
ping_finish();
--
To view, visit https://gerrit.osmocom.org/c/osmo-ggsn/+/14011
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Gerrit-Project: osmo-ggsn
Gerrit-Branch: master
Gerrit-Change-Id: Iecc8c5ac45207e7e20129559c4ac7f3c67dfb36a
Gerrit-Change-Number: 14011
Gerrit-PatchSet: 5
Gerrit-Owner: osmith <osmith at sysmocom.de>
Gerrit-Assignee: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <axilirator at gmail.com>
Gerrit-Reviewer: osmith <osmith at sysmocom.de>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-MessageType: merged
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