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Improved RPC connection cleanup logic

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This commit is contained in:
Joseph Henry 2015-10-22 13:20:50 -07:00
parent b203d25656
commit 2f4628520b
2 changed files with 37 additions and 5 deletions
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3
netcon/Intercept.c
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@ -375,8 +375,7 @@ int socket(SOCKET_SIG)
char cmd[BUF_SZ];
fdret_sock = !is_initialized ? init_service_connection() : fdret_sock;
if(fdret_sock < 0)
{
if(fdret_sock < 0) {
dwr("BAD service connection. exiting.\n");
exit(-1);
}

39
netcon/NetconEthernetTap.cpp
View File

@ -49,9 +49,9 @@
#include "Intercept.h"
#include "NetconUtilities.hpp"
#define APPLICATION_POLL_FREQ 1
#define APPLICATION_POLL_FREQ 5
#define ZT_LWIP_TCP_TIMER_INTERVAL 10
#define STATUS_TMR_INTERVAL 1000
#define STATUS_TMR_INTERVAL 500
namespace ZeroTier {
@ -278,6 +278,7 @@ void NetconEthernetTap::closeConnection(TcpConnection *conn)
close(_phy.getDescriptor(conn->dataSock));
_phy.close(conn->dataSock,false);
}
/* Eventually we might want to use a map here instead */
for(int i=0; i<tcp_connections.size(); i++) {
if(tcp_connections[i] == conn) {
tcp_connections.erase(tcp_connections.begin() + i);
@ -341,7 +342,6 @@ void NetconEthernetTap::threadMain()
// Main timer loop
while (_run) {
uint64_t now = OSUtils::now();
uint64_t since_tcp = now - prev_tcp_time;
@ -354,6 +354,29 @@ void NetconEthernetTap::threadMain()
if (since_status >= STATUS_TMR_INTERVAL) {
prev_status_time = now;
fprintf(stderr, "tcp_conns = %d, rpc_socks = %d\n", tcp_connections.size(), rpc_sockets.size());
/* Here we will periodically check the list of rpc_sockets for any which
do not currently have any data connection associated with them. If they are
unused, then we will try to read from them, if they fail, we can safely assumes
that the client has closed their and we can close ours */
for(int i=0, associated = 0; i<rpc_sockets.size(); i++, associated = 0) {
for(int j=0; j<tcp_connections.size(); j++) {
if(tcp_connections[j]->rpcSock == rpc_sockets[i])
associated++;
}
if(!associated){
// No TCP connections are associated, this is a candidate for removal
//fprintf(stderr, "removing RPC connection... \n");
char c;
if(read(_phy.getDescriptor(rpc_sockets[i]),&c,1) < 0) {
closeClient(rpc_sockets[i]);
}
else {
//fprintf(stderr, "this appears to be in use.\n");
}
}
}
}
if (since_tcp >= ZT_LWIP_TCP_TIMER_INTERVAL) {
prev_tcp_time = now;
@ -738,6 +761,12 @@ void NetconEthernetTap::nc_err(void *arg, err_t err)
*/
err_t NetconEthernetTap::nc_poll(void* arg, struct tcp_pcb *tpcb)
{
//Larg *l = (Larg*)arg;
/*
Larg *l = (Larg*)arg;
TcpConnection *conn = l->conn;
@ -1135,6 +1164,10 @@ void NetconEthernetTap::handle_write(TcpConnection *conn)
return;
}
if(conn->idx < max) {
if(!conn->pcb) {
fprintf(stderr, "handle_write(): conn->pcb == NULL. Failed to write.\n");
return;
}
int sndbuf = conn->pcb->snd_buf; // How much we are currently allowed to write to the connection
/* PCB send buffer is full,turn off readability notifications for the
corresponding PhySocket until nc_sent() is called and confirms that there is