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Add support for relaying unix sockets

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This commit is contained in:
Lauri Kasanen
2023-02-16 15:51:26 +02:00
parent 61613c4e65
commit 3bae812364
18 changed files with 333 additions and 0 deletions
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57
common/rfb/VNCSConnectionST.cxx
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@@ -51,6 +51,8 @@ static Cursor emptyCursor(0, 0, Point(0, 0), NULL);
extern rfb::BoolParameter disablebasicauth;
extern "C" char unixrelaynames[MAX_UNIX_RELAYS][MAX_UNIX_RELAY_NAME_LEN];
VNCSConnectionST::VNCSConnectionST(VNCServerST* server_, network::Socket *s,
bool reverse)
: upgradingToUdp(false), sock(s), reverseConnection(reverse),
@@ -73,6 +75,10 @@ VNCSConnectionST::VNCSConnectionST(VNCServerST* server_, network::Socket *s,
memset(bstats_total, 0, sizeof(bstats_total));
gettimeofday(&connStart, NULL);
unsigned i;
for (i = 0; i < MAX_UNIX_RELAYS; i++)
unixRelaySubscriptions[i][0] = '\0';
// Check their permissions, if applicable
kasmpasswdpath[0] = '\0';
wordexp_t wexp;
@@ -1780,3 +1786,54 @@ void VNCSConnectionST::udpDowngrade(const bool byServer)
vlog.info("Client %s downgrading from udp by %s", sock->getPeerAddress(),
byServer ? "the server" : "its own request");
}
void VNCSConnectionST::subscribeUnixRelay(const char *name)
{
bool read, write, owner;
if (!getPerms(read, write, owner) || !write) {
// Need write permissions to subscribe
writer()->writeSubscribeUnixRelay(false, "No permissions");
vlog.info("Client tried to subscribe to unix channel %s without permissions", name);
return;
}
unsigned i;
bool found = false;
for (i = 0; i < MAX_UNIX_RELAYS; i++) {
if (!strcmp(name, unixrelaynames[i])) {
found = true;
break;
}
}
if (!found) {
writer()->writeSubscribeUnixRelay(false, "No such unix channel");
vlog.info("Client tried to subscribe to nonexistent unix channel %s", name);
return;
}
writer()->writeSubscribeUnixRelay(true, "Ok");
for (i = 0; i < MAX_UNIX_RELAYS; i++) {
if (!unixRelaySubscriptions[i][0]) {
strcpy(unixRelaySubscriptions[i], name);
break;
}
}
}
void VNCSConnectionST::unixRelay(const char *name, const rdr::U8 *buf, const unsigned len)
{
unsigned i;
for (i = 0; i < MAX_UNIX_RELAYS; i++) {
if (!strcmp(unixRelaySubscriptions[i], name)) {
server->desktop->receivedUnixRelayData(name, buf, len);
return;
}
}
}
void VNCSConnectionST::sendUnixRelayData(const char name[], const unsigned char *buf,
const unsigned len)
{
writer()->writeUnixRelay(name, buf, len);
}