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authorsfan5 <sfan5@live.de>2020-06-13 19:03:26 +0200
committerGitHub <noreply@github.com>2020-06-13 19:03:26 +0200
commit2424dfe007e451bb02f87884c2b272cf307d6e7c (patch)
treede43d4ab42126b0533bf5955de3ce68f97f53420 /src/network
parent982a030f330bd4f4953ed7d4a7f88286f6fd645d (diff)
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Server pushing media at runtime (#9961)
Diffstat (limited to 'src/network')
-rw-r--r--src/network/clientopcodes.cpp2
-rw-r--r--src/network/clientpackethandler.cpp46
-rw-r--r--src/network/networkprotocol.h9
-rw-r--r--src/network/serveropcodes.cpp2
4 files changed, 57 insertions, 2 deletions
diff --git a/src/network/clientopcodes.cpp b/src/network/clientopcodes.cpp
index 0f20047c0..f812a08a1 100644
--- a/src/network/clientopcodes.cpp
+++ b/src/network/clientopcodes.cpp
@@ -68,7 +68,7 @@ const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES] =
{ "TOCLIENT_TIME_OF_DAY", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_TimeOfDay }, // 0x29
{ "TOCLIENT_CSM_RESTRICTION_FLAGS", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_CSMRestrictionFlags }, // 0x2A
{ "TOCLIENT_PLAYER_SPEED", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_PlayerSpeed }, // 0x2B
- null_command_handler,
+ { "TOCLIENT_MEDIA_PUSH", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_MediaPush }, // 0x2C
null_command_handler,
null_command_handler,
{ "TOCLIENT_CHAT_MESSAGE", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ChatMessage }, // 0x2F
diff --git a/src/network/clientpackethandler.cpp b/src/network/clientpackethandler.cpp
index e000acc92..5934eaf8c 100644
--- a/src/network/clientpackethandler.cpp
+++ b/src/network/clientpackethandler.cpp
@@ -39,6 +39,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "script/scripting_client.h"
#include "util/serialize.h"
#include "util/srp.h"
+#include "util/sha1.h"
#include "tileanimation.h"
#include "gettext.h"
#include "skyparams.h"
@@ -1471,6 +1472,51 @@ void Client::handleCommand_PlayerSpeed(NetworkPacket *pkt)
player->addVelocity(added_vel);
}
+void Client::handleCommand_MediaPush(NetworkPacket *pkt)
+{
+ std::string raw_hash, filename, filedata;
+ bool cached;
+
+ *pkt >> raw_hash >> filename >> cached;
+ filedata = pkt->readLongString();
+
+ if (raw_hash.size() != 20 || filedata.empty() || filename.empty() ||
+ !string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)) {
+ throw PacketError("Illegal filename, data or hash");
+ }
+
+ verbosestream << "Server pushes media file \"" << filename << "\" with "
+ << filedata.size() << " bytes of data (cached=" << cached
+ << ")" << std::endl;
+
+ if (m_media_pushed_files.count(filename) != 0) {
+ // Silently ignore for synchronization purposes
+ return;
+ }
+
+ // Compute and check checksum of data
+ std::string computed_hash;
+ {
+ SHA1 ctx;
+ ctx.addBytes(filedata.c_str(), filedata.size());
+ unsigned char *buf = ctx.getDigest();
+ computed_hash.assign((char*) buf, 20);
+ free(buf);
+ }
+ if (raw_hash != computed_hash) {
+ verbosestream << "Hash of file data mismatches, ignoring." << std::endl;
+ return;
+ }
+
+ // Actually load media
+ loadMedia(filedata, filename, true);
+ m_media_pushed_files.insert(filename);
+
+ // Cache file for the next time when this client joins the same server
+ if (cached)
+ clientMediaUpdateCache(raw_hash, filedata);
+}
+
/*
* Mod channels
*/
diff --git a/src/network/networkprotocol.h b/src/network/networkprotocol.h
index ab924f1db..fd683eac9 100644
--- a/src/network/networkprotocol.h
+++ b/src/network/networkprotocol.h
@@ -323,6 +323,15 @@ enum ToClientCommand
v3f added_vel
*/
+ TOCLIENT_MEDIA_PUSH = 0x2C,
+ /*
+ std::string raw_hash
+ std::string filename
+ bool should_be_cached
+ u32 len
+ char filedata[len]
+ */
+
// (oops, there is some gap here)
TOCLIENT_CHAT_MESSAGE = 0x2F,
diff --git a/src/network/serveropcodes.cpp b/src/network/serveropcodes.cpp
index 6ee4ff256..2fc3197c2 100644
--- a/src/network/serveropcodes.cpp
+++ b/src/network/serveropcodes.cpp
@@ -167,7 +167,7 @@ const ClientCommandFactory clientCommandFactoryTable[TOCLIENT_NUM_MSG_TYPES] =
{ "TOCLIENT_TIME_OF_DAY", 0, true }, // 0x29
{ "TOCLIENT_CSM_RESTRICTION_FLAGS", 0, true }, // 0x2A
{ "TOCLIENT_PLAYER_SPEED", 0, true }, // 0x2B
- null_command_factory, // 0x2C
+ { "TOCLIENT_MEDIA_PUSH", 0, true }, // 0x2C (sent over channel 1 too)
null_command_factory, // 0x2D
null_command_factory, // 0x2E
{ "TOCLIENT_CHAT_MESSAGE", 0, true }, // 0x2F