asgardius/virtualx-engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Fix buffer size check in UDP socket.

Browse source 
We were reserving 12 bytes from the buffer for ip, port, and length, but since
IPv6 introduction we should be reserving 24 (IPv6 are 16 bytes)
This commit is contained in:
Fabio Alessandrelli 2017-01-19 17:00:01 +01:00
parent 9336857132
commit 5dc7c920bf
2 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/unix/packet_peer_udp_posix.cpp
View file

@ -179,7 +179,7 @@ Error PacketPeerUDPPosix::_poll(bool p_wait) {
struct sockaddr_storage from = {0};
socklen_t len = sizeof(struct sockaddr_storage);
int ret;
while ( (ret = recvfrom(sockfd, recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-12, 0)), p_wait?0:MSG_DONTWAIT, (struct sockaddr*)&from, &len)) > 0) {
while ( (ret = recvfrom(sockfd, recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-24, 0)), p_wait?0:MSG_DONTWAIT, (struct sockaddr*)&from, &len)) > 0) {
uint32_t port = 0;

2
platform/windows/packet_peer_udp_winsock.cpp
View file

@ -175,7 +175,7 @@ Error PacketPeerUDPWinsock::_poll(bool p_wait) {
struct sockaddr_storage from = {0};
int len = sizeof(struct sockaddr_storage);
int ret;
while ( (ret = recvfrom(sockfd, (char*)recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-12, 0)), 0, (struct sockaddr*)&from, &len)) > 0) {
while ( (ret = recvfrom(sockfd, (char*)recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-24, 0)), 0, (struct sockaddr*)&from, &len)) > 0) {
uint32_t port = 0;