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Check rng return value when generating Transaction IDs in DHCP plugin
author
Tobias Brunner
<tobias@strongswan.org>
Mon, 25 Jun 2012 13:56:31 +0000
(15:56 +0200)
committer
Martin Willi
<martin@revosec.ch>
Mon, 16 Jul 2012 12:53:36 +0000
(14:53 +0200)
src/libcharon/plugins/dhcp/dhcp_socket.c
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diff --git
a/src/libcharon/plugins/dhcp/dhcp_socket.c
b/src/libcharon/plugins/dhcp/dhcp_socket.c
index
b4e9af7
..
8f976ae
100644
(file)
--- a/
src/libcharon/plugins/dhcp/dhcp_socket.c
+++ b/
src/libcharon/plugins/dhcp/dhcp_socket.c
@@
-366,7
+366,11
@@
METHOD(dhcp_socket_t, enroll, dhcp_transaction_t*,
u_int32_t id;
int try;
- this->rng->get_bytes(this->rng, sizeof(id), (u_int8_t*)&id);
+ if (!this->rng->get_bytes(this->rng, sizeof(id), (u_int8_t*)&id))
+ {
+ DBG1(DBG_CFG, "DHCP DISCOVER failed, no transaction ID");
+ return NULL;
+ }
transaction = dhcp_transaction_create(id, identity);
this->mutex->lock(this->mutex);