diff options
Diffstat (limited to 'src/network/network_server.cpp')
| -rw-r--r-- | src/network/network_server.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp index c35e437e5..89d97ae50 100644 --- a/src/network/network_server.cpp +++ b/src/network/network_server.cpp @@ -29,6 +29,7 @@ #include "../company_gui.h" #include "../window_func.h" #include "../roadveh.h" +#include "../rev.h" #include "table/strings.h" @@ -776,6 +777,27 @@ DEF_SERVER_RECEIVE_COMMAND(PACKET_CLIENT_GETMAP) { NetworkClientSocket *new_cs; + /* Do an extra version match. We told the client our version already, + * lets confirm that the client isn't lieing to us. + * But only do it for stable releases because of those we are sure + * that everybody has the same NewGRF version. For trunk and the + * branches we make tarballs of the OpenTTDs compiled from tarball + * will have the lower bits set to 0. As such they would become + * incompatible, which we would like to prevent by this. */ + if (HasBit(_openttd_newgrf_version, 19)) { + if (_openttd_newgrf_version != p->Recv_uint32()) { + /* The version we get from the client differs, it must have the + * wrong version. The client must be wrong. */ + SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED); + return NETWORK_RECV_STATUS_OKAY; + } + } else if (p->size != 3) { + /* We received a packet from a version that claims to be stable. + * That shouldn't happen. The client must be wrong. */ + SEND_COMMAND(PACKET_SERVER_ERROR)(cs, NETWORK_ERROR_NOT_EXPECTED); + return NETWORK_RECV_STATUS_OKAY; + } + /* The client was never joined.. so this is impossible, right? * Ignore the packet, give the client a warning, and close his connection */ if (cs->status < STATUS_AUTH || cs->HasClientQuit()) { |