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-rw-r--r--src/lib/protocols/smpp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/protocols/smpp.c b/src/lib/protocols/smpp.c
index c188bd91f..e0521ae12 100644
--- a/src/lib/protocols/smpp.c
+++ b/src/lib/protocols/smpp.c
@@ -68,7 +68,7 @@ void ndpi_search_smpp_tcp(struct ndpi_detection_module_struct* ndpi_struct,
u_int32_t tmp_pdu_l = 0;
u_int16_t pdu_c = 1;
// loop PDUs (check if lengths are valid)
- while(total_pdu_l < packet->payload_packet_len) {
+ while(total_pdu_l < (packet->payload_packet_len-4)) {
// get next PDU length
tmp_pdu_l = ntohl(get_u_int32_t(packet->payload, total_pdu_l));
// if zero or overflowing , return, will try the next TCP segment