Harald Welte has submitted this change and it was merged.
Change subject: ggsn: Send proper errors in create_context_ind()
......................................................................
ggsn: Send proper errors in create_context_ind()
When we receive PDP context requests for unknown PDP types or if
we run out of dynamic addresses, we need to inform the SGSN that
PDP context creation failed.
Change-Id: Ibf199c1726130d27c8f80230b30ee51101c93b06
---
M ggsn/ggsn.c
M lib/ippool.c
M lib/ippool.h
3 files changed, 20 insertions(+), 11 deletions(-)
Approvals:
Harald Welte: Looks good to me, approved
Jenkins Builder: Verified
diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index 8e7d1e3..0629f9e 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -178,6 +178,7 @@
{
struct in46_addr addr;
struct ippoolm_t *member;
+ int rc;
DEBUGP(DGGSN, "Received create PDP context request\n");
@@ -192,11 +193,16 @@
pdp->qos_neg.l = pdp->qos_req.l;
if (in46a_from_eua(&pdp->eua, &addr)) {
- addr.v4.s_addr = 0; /* Request dynamic */
+ SYS_ERR(DGGSN, LOGL_ERROR, 0, "Cannot decode EUA from MS/SGSN:
%s",
+ osmo_hexdump(pdp->eua.v, pdp->eua.l));
+ gtp_create_context_resp(gsn, pdp, GTPCAUSE_UNKNOWN_PDP);
+ return 0;
}
- if (ippool_newip(ippool, &member, &addr, 0)) {
- gtp_create_context_resp(gsn, pdp, GTPCAUSE_NO_RESOURCES);
+ rc = ippool_newip(ippool, &member, &addr, 0);
+ if (rc < 0) {
+ SYS_ERR(DGGSN, LOGL_ERROR, 0, "Cannot allocate IP address in
pool\n");
+ gtp_create_context_resp(gsn, pdp, -rc);
return 0; /* Allready in use, or no more available */
}
@@ -208,6 +214,8 @@
if (gtp_kernel_tunnel_add(pdp) < 0) {
SYS_ERR(DGGSN, LOGL_ERROR, 0,
"Cannot add tunnel to kernel: %s\n", strerror(errno));
+ gtp_create_context_resp(gsn, pdp, GTPCAUSE_SYS_FAIL);
+ return 0;
}
if (!send_trap(gsn, pdp, member, "imsi-ass-ip")) { /* TRAP with IP
assignment */
diff --git a/lib/ippool.c b/lib/ippool.c
index 3ca1b86..007dc50 100644
--- a/lib/ippool.c
+++ b/lib/ippool.c
@@ -402,7 +402,7 @@
if (!this->allowstat) {
SYS_ERR(DIP, LOGL_ERROR, 0,
"Static IP address not allowed");
- return -1;
+ return -GTPCAUSE_NOT_SUPPORTED;
}
if (!in46a_within_mask(addr, &this->stataddr,
this->stataddrprefixlen)) {
SYS_ERR(DIP, LOGL_ERROR, 0, "Static out of range");
@@ -412,7 +412,7 @@
if (!this->allowdyn) {
SYS_ERR(DIP, LOGL_ERROR, 0,
"Dynamic IP address not allowed");
- return -1;
+ return -GTPCAUSE_NOT_SUPPORTED;
}
}
@@ -438,7 +438,7 @@
if (!this->firstdyn) {
SYS_ERR(DIP, LOGL_ERROR, 0,
"No more IP addresses available");
- return -1;
+ return -GTPCAUSE_ADDR_OCCUPIED;
} else
p2 = this->firstdyn;
}
@@ -447,12 +447,12 @@
if (p2->inuse) {
SYS_ERR(DIP, LOGL_ERROR, 0,
"IP address allready in use");
- return -1; /* Allready in use / Should not happen
*/
+ return -GTPCAUSE_SYS_FAIL; /* Allready in use /
Should not happen */
}
if (p2->addr.len != addr->len) {
SYS_ERR(DIP, LOGL_ERROR, 0, "MS requested unsupported
PDP context type");
- return -1;
+ return -GTPCAUSE_UNKNOWN_PDP;
}
/* Remove from linked list of free dynamic addresses */
@@ -481,13 +481,13 @@
if (!this->firststat) {
SYS_ERR(DIP, LOGL_ERROR, 0,
"No more IP addresses available");
- return -1; /* No more available */
+ return -GTPCAUSE_ADDR_OCCUPIED; /* No more available */
} else
p2 = this->firststat;
if (p2->addr.len != addr->len) {
SYS_ERR(DIP, LOGL_ERROR, 0, "MS requested unsupported
PDP context type");
- return -1;
+ return -GTPCAUSE_UNKNOWN_PDP;
}
/* Remove from linked list of free static addresses */
@@ -512,7 +512,7 @@
SYS_ERR(DIP, LOGL_ERROR, 0,
"Could not allocate IP address");
- return -1; /* Should never get here. TODO: Bad code */
+ return -GTPCAUSE_SYS_FAIL; /* Should never get here. TODO:
Bad code */
}
int ippool_freeip(struct ippool_t *this, struct ippoolm_t *member)
diff --git a/lib/ippool.h b/lib/ippool.h
index e3c1c92..ba92a56 100644
--- a/lib/ippool.h
+++ b/lib/ippool.h
@@ -13,6 +13,7 @@
#define _IPPOOL_H
#include "../lib/in46_addr.h"
+#include "../gtp/gtp.h"
/* Assuming that the address space is fragmented we need a hash table
in order to return the addresses.
--
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Gerrit-MessageType: merged
Gerrit-Change-Id: Ibf199c1726130d27c8f80230b30ee51101c93b06
Gerrit-PatchSet: 6
Gerrit-Project: openggsn
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <lafo...@gnumonks.org>
Gerrit-Reviewer: Harald Welte <lafo...@gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
