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Update smpp.c

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dillinger79 2017-01-18 18:21:47 +01:00 • committed by GitHub
parent e44834e0c5
commit 4e6dda6361
1 changed files with 7 additions and 2 deletions
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9
src/lib/protocols/smpp.c
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@ -31,6 +31,11 @@ static void ndpi_int_smpp_add_connection(struct ndpi_detection_module_struct* nd
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SMPP, NDPI_PROTOCOL_UNKNOWN);
}
static u_int8_t ndpi_check_overflow(u_int32_t current_legth, u_int32_t total_lenth)
{
return (current_legth > 0 && current_legth > INT_MAX - total_lenth);
}
void ndpi_search_smpp_tcp(struct ndpi_detection_module_struct* ndpi_struct,
struct ndpi_flow_struct* flow)
{
@ -68,8 +73,8 @@ void ndpi_search_smpp_tcp(struct ndpi_detection_module_struct* ndpi_struct,
while(total_pdu_l < packet->payload_packet_len) {
// get next PDU length
tmp_pdu_l = ntohl(get_u_int32_t(packet->payload, total_pdu_l));
// if zero, return, will try the next TCP segment
if(tmp_pdu_l == 0) return;
// if zero or overflowing , return, will try the next TCP segment
if(tmp_pdu_l == 0 || ndpi_check_overflow(tmp_pdu_l, total_pdu_l) ) return;
// inc total PDU length
total_pdu_l += ntohl(get_u_int32_t(packet->payload, total_pdu_l));
// inc total PDU count