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New PROTOCOL_VERSION scheme (allow client to support a range of versions)

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This commit is contained in:
Perttu Ahola 2012-11-26 09:49:07 +02:00
parent ab507f83e2
commit 197542c7ec
3 changed files with 32 additions and 13 deletions
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25
src/server.cpp
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@ -2037,11 +2037,22 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
Read and check network protocol version
*/
u16 net_proto_version = 0;
u16 min_net_proto_version = 0;
if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
{
net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
}
min_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
// Use min if version field doesn't exist (backwards compatibility)
u16 max_net_proto_version = min_net_proto_version;
if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2)
max_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2]);
u16 net_proto_version = max_net_proto_version;
if(max_net_proto_version != SERVER_PROTOCOL_VERSION && min_net_proto_version <= SERVER_PROTOCOL_VERSION)
net_proto_version = SERVER_PROTOCOL_VERSION;
verbosestream<<"Server: "<<peer_id<<" Protocol version: min: "
<<min_net_proto_version<<", max: "<<max_net_proto_version
<<", chosen: "<<net_proto_version<<std::endl;
getClient(peer_id)->net_proto_version = net_proto_version;
@ -2059,7 +2070,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
if(g_settings->getBool("strict_protocol_version_checking"))
{
if(net_proto_version != PROTOCOL_VERSION)
if(net_proto_version != SERVER_PROTOCOL_VERSION)
{
actionstream<<"Server: A mismatched client tried to connect"
<<" from "<<addr_s<<std::endl;
@ -2068,7 +2079,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
L"Server version is ")
+ narrow_to_wide(VERSION_STRING) + L",\n"
+ L"server's PROTOCOL_VERSION is "
+ narrow_to_wide(itos(PROTOCOL_VERSION))
+ narrow_to_wide(itos(SERVER_PROTOCOL_VERSION))
+ L", client's PROTOCOL_VERSION is "
+ narrow_to_wide(itos(net_proto_version))
);
@ -2310,7 +2321,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
}
// Warnings about protocol version can be issued here
if(getClient(peer_id)->net_proto_version < PROTOCOL_VERSION)
if(getClient(peer_id)->net_proto_version < SERVER_PROTOCOL_VERSION)
{
SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT IS OLD AND MAY WORK PROPERLY WITH THIS SERVER!");
}