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Object-Model refactor: Removed notion of Client

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This commit is contained in:
Joseph Henry 2015-09-27 06:08:39 -04:00
parent fe78eb77d4
commit 3bc9530db7
3 changed files with 184 additions and 277 deletions
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325
netcon/NetconEthernetTap.cpp
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@ -247,84 +247,64 @@ void NetconEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,s
_multicastGroups.swap(newGroups);
}
NetconConnection *NetconEthernetTap::getConnectionByPCB(struct tcp_pcb *pcb)
TcpConnection *NetconEthernetTap::getConnectionByPCB(struct tcp_pcb *pcb)
{
NetconConnection *c;
for(size_t i=0; i<clients.size(); i++) {
c = clients[i]->containsPCB(pcb);
if(c) return c;
for(size_t i=0; i<tcp_connections.size(); i++) {
if(tcp_connections[i]->pcb == pcb)
return tcp_connections[i];
}
return NULL;
}
NetconConnection *NetconEthernetTap::getConnectionByThisFD(int fd)
TcpConnection *NetconEthernetTap::getConnectionByTheirFD(int fd)
{
for(size_t i=0; i<clients.size(); i++) {
for(size_t j=0; j<clients[i]->connections.size(); j++) {
if(_phy.getDescriptor(clients[i]->connections[j]->sock) == fd)
return clients[i]->connections[j];
}
for(size_t i=0; i<tcp_connections.size(); i++) {
if(tcp_connections[i]->perceived_fd == fd)
return tcp_connections[i];
}
return NULL;
}
NetconClient *NetconEthernetTap::getClientByPCB(struct tcp_pcb *pcb)
{
for(size_t i=0; i<clients.size(); i++) {
if(clients[i]->containsPCB(pcb))
return clients[i];
}
return NULL;
}
void NetconEthernetTap::closeAllClients()
{
for(size_t i=0; i<clients.size(); i++){
closeClient(clients[i]);
}
}
/*
* Closes a NetconConnection and associated LWIP PCB strcuture.
* Closes a TcpConnection and associated LWIP PCB strcuture.
*/
void NetconEthernetTap::closeConnection(NetconConnection *conn)
void NetconEthernetTap::closeConnection(TcpConnection *conn)
{
fprintf(stderr, "closeConnection(): closing: conn->type = %d, fd=%d\n", conn->type, _phy.getDescriptor(conn->sock));
NetconClient *client = conn->owner;
if(conn->type == TCP_DATA && conn->pcb == NULL) {
fprintf(stderr, "closeConnection(): PCB is null\n");
return;
}
if(conn->type == TCP_DATA)
{
lwipstack->_tcp_arg(conn->pcb, NULL);
lwipstack->_tcp_sent(conn->pcb, NULL);
lwipstack->_tcp_recv(conn->pcb, NULL);
lwipstack->_tcp_err(conn->pcb, NULL);
lwipstack->_tcp_poll(conn->pcb, NULL, 0);
lwipstack->_tcp_close(conn->pcb);
}
close(_phy.getDescriptor(conn->sock));
//fprintf(stderr, "closeConnection(): closing: conn->type = %d, fd=%d\n", conn->type, _phy.getDescriptor(conn->sock));
lwipstack->_tcp_arg(conn->pcb, NULL);
lwipstack->_tcp_sent(conn->pcb, NULL);
lwipstack->_tcp_recv(conn->pcb, NULL);
lwipstack->_tcp_err(conn->pcb, NULL);
lwipstack->_tcp_poll(conn->pcb, NULL, 0);
lwipstack->_tcp_close(conn->pcb);
close(_phy.getDescriptor(conn->dataSock));
close(conn->their_fd);
_phy.close(conn->sock);
_phy.close(conn->dataSock);
for(int i=0; i<tcp_connections.size(); i++) {
if(tcp_connections[i] == conn) {
tcp_connections.erase(tcp_connections.begin() + i);
}
}
delete conn;
}
/*
* Closes a NetconClient and all associated NetconConnections (rpc, data, and unmapped)
*/
void NetconEthernetTap::closeClient(NetconClient *client)
void NetconEthernetTap::closeClient(PhySocket *sock)
{
{
Mutex::Lock _l(lwipstack->_lock);
closeConnection(client->rpc);
closeConnection(client->unmapped_conn);
}
while(client->connections.size()){
closeConnection(client->connections.front());
client->connections.erase(client->connections.begin());
for(int i=0; i<rpc_sockets.size(); i++) {
if(rpc_sockets[i] == sock)
rpc_sockets.erase(rpc_sockets.begin() + i);
}
close(_phy.getDescriptor(sock));
_phy.close(sock);
}
void NetconEthernetTap::closeAll()
{
while(rpc_sockets.size())
closeClient(rpc_sockets.front());
while(tcp_connections.size())
closeConnection(tcp_connections.front());
}
#define ZT_LWIP_TCP_TIMER_INTERVAL 10
@ -332,6 +312,7 @@ void NetconEthernetTap::closeClient(NetconClient *client)
void NetconEthernetTap::threadMain()
throw()
{
fprintf(stderr, "_threadMain()\n");
uint64_t prev_tcp_time = 0;
uint64_t prev_etharp_time = 0;
@ -380,15 +361,15 @@ void NetconEthernetTap::threadMain()
}
_phy.poll((unsigned long)std::min(tcp_remaining,etharp_remaining));
}
closeAllClients();
//closeAllClients();
// TODO: cleanup -- destroy LWIP state, kill any clients, unload .so, etc.
}
void NetconEthernetTap::phyOnUnixClose(PhySocket *sock,void **uptr)
{
fprintf(stderr, "phyOnUnixClose() CLOSING: %d\n", _phy.getDescriptor(sock));
//close(_phy.getDescriptor(sock));
//closeClient((NetconClient*)*uptr);
//fprintf(stderr, "phyOnUnixClose() CLOSING: %d\n", _phy.getDescriptor(sock));
//closeClient(sock);
// FIXME:
}
/*
@ -398,14 +379,13 @@ void NetconEthernetTap::phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,
{
if(readable) {
int r;
NetconConnection *c = ((NetconClient*)*uptr)->getConnection(sock);
if(c->idx < DEFAULT_READ_BUFFER_SIZE) {
TcpConnection *conn = (TcpConnection*)*uptr;
if(conn->idx < DEFAULT_READ_BUFFER_SIZE) {
int read_fd = _phy.getDescriptor(sock);
//fprintf(stderr, "phyOnFileDescriptorActivity(): read_fd = %d\n", read_fd);
if((r = read(read_fd, (&c->buf)+c->idx, DEFAULT_READ_BUFFER_SIZE-(c->idx))) > 0) {
c->idx += r;
if((r = read(read_fd, (&conn->buf)+conn->idx, DEFAULT_READ_BUFFER_SIZE-(conn->idx))) > 0) {
conn->idx += r;
Mutex::Lock _l(lwipstack->_lock);
handle_write(c);
handle_write(conn);
}
}
}
@ -427,12 +407,8 @@ void NetconEthernetTap::phyOnTcpWritable(PhySocket *sock,void **uptr) {}
*/
void NetconEthernetTap::phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN)
{
fprintf(stderr, "phyOnUnixAccept() NEW CLIENT RPC: %d\n", _phy.getDescriptor(sockN));
NetconClient *newClient = new NetconClient();
newClient->rpc = newClient->addConnection(RPC, sockN);
*uptrN = newClient;
clients.push_back(newClient);
//fprintf(stderr, "phyOnUnixAccept() NEW CLIENT RPC: %d\n", _phy.getDescriptor(sockN));
rpc_sockets.push_back(sockN);
}
/*
@ -441,45 +417,39 @@ void NetconEthernetTap::phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void *
void NetconEthernetTap::phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len)
{
unsigned char *buf = (unsigned char*)data;
NetconClient *client = (NetconClient*)*uptr;
switch(buf[0])
{
case RPC_SOCKET:
fprintf(stderr, "RPC_SOCKET\n");
struct socket_st socket_rpc;
memcpy(&socket_rpc, &buf[1], sizeof(struct socket_st));
client->tid = socket_rpc.__tid;
handle_socket(client, &socket_rpc);
handle_socket(sock, uptr, &socket_rpc);
break;
case RPC_LISTEN:
fprintf(stderr, "RPC_LISTEN\n");
struct listen_st listen_rpc;
memcpy(&listen_rpc, &buf[1], sizeof(struct listen_st));
client->tid = listen_rpc.__tid;
handle_listen(client, &listen_rpc);
handle_listen(sock, uptr, &listen_rpc);
break;
case RPC_BIND:
fprintf(stderr, "RPC_BIND\n");
struct bind_st bind_rpc;
memcpy(&bind_rpc, &buf[1], sizeof(struct bind_st));
client->tid = bind_rpc.__tid;
handle_bind(client, &bind_rpc);
handle_bind(sock, uptr, &bind_rpc);
break;
case RPC_KILL_INTERCEPT:
fprintf(stderr, "RPC_KILL_INTERCEPT\n");
closeClient(client);
//scloseClient(sock);
break;
case RPC_CONNECT:
fprintf(stderr, "RPC_CONNECT\n");
struct connect_st connect_rpc;
memcpy(&connect_rpc, &buf[1], sizeof(struct connect_st));
client->tid = connect_rpc.__tid;
handle_connect(client, &connect_rpc);
handle_connect(sock, uptr, &connect_rpc);
break;
case RPC_FD_MAP_COMPLETION:
fprintf(stderr, "RPC_FD_MAP_COMPLETION\n");
handle_retval(client, buf);
handle_retval(sock, uptr, buf);
break;
default:
break;
@ -489,20 +459,20 @@ void NetconEthernetTap::phyOnUnixData(PhySocket *sock,void **uptr,void *data,uns
/*
* Send a return value to the client for an RPC
*/
int NetconEthernetTap::send_return_value(NetconClient *client, int retval)
int NetconEthernetTap::send_return_value(TcpConnection *conn, int retval)
{
char retmsg[4];
memset(&retmsg, '\0', sizeof(retmsg));
retmsg[0]=RPC_RETVAL;
memcpy(&retmsg[1], &retval, sizeof(retval));
int n = write(_phy.getDescriptor(client->rpc->sock), &retmsg, sizeof(retmsg));
int n = write(_phy.getDescriptor(conn->rpcSock), &retmsg, sizeof(retmsg));
if(n > 0) {
// signal that we've satisfied this requirement
client->waiting_for_retval = false;
conn->pending = false;
}
else {
fprintf(stderr, "unable to send return value to the intercept\n");
closeClient(client);
closeConnection(conn);
}
return n;
}
@ -526,10 +496,10 @@ err_t NetconEthernetTap::nc_poll(void* arg, struct tcp_pcb *tpcb)
{
//fprintf(stderr, "nc_poll\n");
Larg *l = (Larg*)arg;
NetconConnection *c = l->tap->getConnectionByPCB(tpcb);
TcpConnection *conn = l->conn;
NetconEthernetTap *tap = l->tap;
if(c && c->idx) // if valid connection and non-zero index (indicating data present)
tap->handle_write(c);
if(conn && conn->idx) // if valid connection and non-zero index (indicating data present)
tap->handle_write(conn);
return ERR_OK;
}
@ -551,29 +521,30 @@ err_t NetconEthernetTap::nc_poll(void* arg, struct tcp_pcb *tpcb)
*/
err_t NetconEthernetTap::nc_accept(void *arg, struct tcp_pcb *newpcb, err_t err)
{
fprintf(stderr, "nc_accept()\n");
Larg *l = (Larg*)arg;
int larg_fd = l->tap->_phy.getDescriptor(l->sock);
TcpConnection *conn = l->conn;
NetconEthernetTap *tap = l->tap;
NetconConnection *c = tap->getConnectionByThisFD(larg_fd);
if(c) {
NetconClient *client = c->owner;
if(!client){
fprintf(stderr, "nc_accpet(%d): unable to locate client for this PCB\n", larg_fd);
return -1;
}
int larg_fd = tap->_phy.getDescriptor(conn->dataSock);
if(conn) {
ZT_PHY_SOCKFD_TYPE fds[2];
socketpair(PF_LOCAL, SOCK_STREAM, 0, fds);
NetconConnection *new_conn = client->addConnection(TCP_DATA, tap->_phy.wrapSocket(fds[0], client));
client->connections.push_back(new_conn);
new_conn->pcb = newpcb;
new_conn->their_fd = fds[1];
int send_fd = tap->_phy.getDescriptor(client->rpc->sock);
TcpConnection *new_tcp_conn = new TcpConnection();
new_tcp_conn->dataSock = tap->_phy.wrapSocket(fds[0], new_tcp_conn);
new_tcp_conn->rpcSock = conn->rpcSock;
new_tcp_conn->pcb = newpcb;
new_tcp_conn->their_fd = fds[1];
tap->tcp_connections.push_back(new_tcp_conn);
int send_fd = tap->_phy.getDescriptor(conn->rpcSock);
int n = write(larg_fd, "z", 1);
if(n > 0) {
if(sock_fd_write(send_fd, fds[1]) > 0) {
client->unmapped_conn = new_conn;
new_tcp_conn->pending = true;
fprintf(stderr, "nc_accept(): socketpair = { our=%d, their=%d}\n", fds[0], fds[1]);
}
else {
fprintf(stderr, "nc_accept(%d): unable to send fd to client\n", larg_fd);
@ -583,12 +554,12 @@ err_t NetconEthernetTap::nc_accept(void *arg, struct tcp_pcb *newpcb, err_t err)
fprintf(stderr, "nc_accept(%d): error writing signal byte (send_fd = %d, perceived_fd = %d)\n", larg_fd, send_fd, fds[1]);
return -1;
}
tap->lwipstack->_tcp_arg(newpcb, new Larg(tap, new_conn->sock));
tap->lwipstack->_tcp_arg(newpcb, new Larg(tap, new_tcp_conn));
tap->lwipstack->_tcp_recv(newpcb, nc_recved);
tap->lwipstack->_tcp_err(newpcb, nc_err);
tap->lwipstack->_tcp_sent(newpcb, nc_sent);
tap->lwipstack->_tcp_poll(newpcb, nc_poll, 1);
tcp_accepted(c->pcb);
tcp_accepted(conn->pcb);
return ERR_OK;
}
else {
@ -612,22 +583,19 @@ err_t NetconEthernetTap::nc_accept(void *arg, struct tcp_pcb *newpcb, err_t err)
*/
err_t NetconEthernetTap::nc_recved(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
fprintf(stderr, "nc_recved()\n");
Larg *l = (Larg*)arg;
NetconConnection *c = l->tap->getConnectionByPCB(tpcb);
NetconEthernetTap *tap = l->tap;
int n;
struct pbuf* q = p;
if(!c) {
if(!l->conn) {
fprintf(stderr, "nc_recved(): no connection object\n");
return ERR_OK; // ?
}
if(p == NULL) {
if(c) {
if(l->conn) {
fprintf(stderr, "nc_recved(): closing connection\n");
tap->_phy.close(c->sock);
tap->closeConnection(c);
l->tap->closeConnection(l->conn);
}
else {
fprintf(stderr, "nc_recved(): can't locate connection via (arg)\n");
@ -638,18 +606,18 @@ err_t NetconEthernetTap::nc_recved(void *arg, struct tcp_pcb *tpcb, struct pbuf
while(p != NULL) { // Cycle through pbufs and write them to the socket
if(p->len <= 0)
break; // ?
if((n = tap->_phy.streamSend(c->sock,p->payload, p->len)) > 0) {
if((n = l->tap->_phy.streamSend(l->conn->dataSock,p->payload, p->len)) > 0) {
if(n < p->len) {
fprintf(stderr, "nc_recved(): unable to write entire pbuf to buffer\n");
}
tap->lwipstack->_tcp_recved(tpcb, n); // TODO: would it be more efficient to call this once at the end?
l->tap->lwipstack->_tcp_recved(tpcb, n); // TODO: would it be more efficient to call this once at the end?
}
else {
fprintf(stderr, "nc_recved(): No data written to intercept buffer\n");
}
p = p->next;
}
tap->lwipstack->_pbuf_free(q); // free pbufs
l->tap->lwipstack->_pbuf_free(q); // free pbufs
return ERR_OK;
}
@ -667,13 +635,11 @@ void NetconEthernetTap::nc_err(void *arg, err_t err)
{
fprintf(stderr, "nc_err\n");
Larg *l = (Larg*)arg;
NetconEthernetTap *tap = l->tap;
NetconConnection *c = tap->getConnectionByThisFD(tap->_phy.getDescriptor(l->sock));
if(c) {
tap->closeConnection(c);
if(l->conn) {
l->tap->closeConnection(l->conn);
}
else {
fprintf(stderr, "can't locate connection object for PCB\n");
fprintf(stderr, "nc_err(): can't locate connection object for PCB\n");
}
}
@ -690,7 +656,7 @@ void NetconEthernetTap::nc_err(void *arg, err_t err)
*/
err_t NetconEthernetTap::nc_sent(void* arg, struct tcp_pcb *tpcb, u16_t len)
{
//fprintf(stderr, "nc_sent\n");
fprintf(stderr, "nc_sent\n");
return ERR_OK;
}
@ -708,17 +674,10 @@ err_t NetconEthernetTap::nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err
{
fprintf(stderr, "nc_connected\n");
Larg *l = (Larg*)arg;
NetconEthernetTap *tap = l->tap;
for(size_t i=0; i<tap->clients.size(); i++) {
if(tap->clients[i]->containsPCB(tpcb)) {
tap->send_return_value(tap->clients[i],err);
}
}
l->tap->send_return_value(l->conn, err);
return ERR_OK;
}
/*------------------------------------------------------------------------------
----------------------------- RPC Handler functions ----------------------------
------------------------------------------------------------------------------*/
@ -730,17 +689,19 @@ err_t NetconEthernetTap::nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err
* @param structure containing the data and parameters for this client's RPC
*
*/
void NetconEthernetTap::handle_bind(NetconClient *client, struct bind_st *bind_rpc)
void NetconEthernetTap::handle_bind(PhySocket *sock, void **uptr, struct bind_st *bind_rpc)
{
struct sockaddr_in *connaddr;
connaddr = (struct sockaddr_in *) &bind_rpc->addr;
int conn_port = lwipstack->ntohs(connaddr->sin_port);
ip_addr_t conn_addr;
conn_addr.addr = *((u32_t *)_ips[0].rawIpData());
NetconConnection *c = client->getConnectionByTheirFD(bind_rpc->sockfd);
if(c) {
if(c->pcb->state == CLOSED){
int err = lwipstack->tcp_bind(c->pcb, &conn_addr, conn_port);
TcpConnection *conn = getConnectionByTheirFD(bind_rpc->sockfd);
if(conn) {
if(conn->pcb->state == CLOSED){
int err = lwipstack->tcp_bind(conn->pcb, &conn_addr, conn_port);
if(err != ERR_OK) {
int ip = connaddr->sin_addr.s_addr;
unsigned char d[4];
@ -763,22 +724,22 @@ void NetconEthernetTap::handle_bind(NetconClient *client, struct bind_st *bind_r
* @param structure containing the data and parameters for this client's RPC
*
*/
void NetconEthernetTap::handle_listen(NetconClient *client, struct listen_st *listen_rpc)
void NetconEthernetTap::handle_listen(PhySocket *sock, void **uptr, struct listen_st *listen_rpc)
{
NetconConnection *c = client->getConnectionByTheirFD(listen_rpc->sockfd);
if(c) {
if(c->pcb->state == LISTEN) {
TcpConnection *conn = getConnectionByTheirFD(listen_rpc->sockfd);
if(conn) {
if(conn->pcb->state == LISTEN) {
fprintf(stderr, "handle_listen(): PCB is already in listening state.\n");
return;
}
struct tcp_pcb* listening_pcb = lwipstack->tcp_listen(c->pcb);
struct tcp_pcb* listening_pcb = lwipstack->tcp_listen(conn->pcb);
if(listening_pcb != NULL) {
c->pcb = listening_pcb;
conn->pcb = listening_pcb;
lwipstack->tcp_accept(listening_pcb, nc_accept);
lwipstack->tcp_arg(listening_pcb, new Larg(this, c->sock));
lwipstack->tcp_arg(listening_pcb, new Larg(this, conn));
/* we need to wait for the client to send us the fd allocated on their end
for this listening socket */
client->waiting_for_retval=true;
conn->pending = true;
}
else {
fprintf(stderr, "handle_listen(): unable to allocate memory for new listening PCB\n");
@ -797,13 +758,14 @@ void NetconEthernetTap::handle_listen(NetconClient *client, struct listen_st *li
* @param structure containing the data and parameters for this client's RPC
*
*/
void NetconEthernetTap::handle_retval(NetconClient *client, unsigned char* buf)
void NetconEthernetTap::handle_retval(PhySocket *sock, void **uptr, unsigned char* buf)
{
if(client->unmapped_conn != NULL) {
memcpy(&(client->unmapped_conn->perceived_fd), &buf[1], sizeof(int));
fprintf(stderr, "handle_retval(): Mapping [our=%d -> their=%d]\n", _phy.getDescriptor(client->unmapped_conn->sock), client->unmapped_conn->perceived_fd);
client->connections.push_back(client->unmapped_conn);
client->unmapped_conn = NULL;
TcpConnection *conn = (TcpConnection*)*uptr;
if(conn->pending) {
memcpy(&(conn->perceived_fd), &buf[1], sizeof(int));
fprintf(stderr, "handle_retval(): Mapping [our=%d -> their=%d]\n",
_phy.getDescriptor(conn->dataSock), conn->perceived_fd);
conn->pending = false;
}
}
@ -819,21 +781,24 @@ void NetconEthernetTap::handle_retval(NetconClient *client, unsigned char* buf)
* @param structure containing the data and parameters for this client's RPC
*
*/
void NetconEthernetTap::handle_socket(NetconClient *client, struct socket_st* socket_rpc)
void NetconEthernetTap::handle_socket(PhySocket *sock, void **uptr, struct socket_st* socket_rpc)
{
struct tcp_pcb *pcb = lwipstack->tcp_new();
if(pcb != NULL) {
struct tcp_pcb *newpcb = lwipstack->tcp_new();
if(newpcb != NULL) {
ZT_PHY_SOCKFD_TYPE fds[2];
socketpair(PF_LOCAL, SOCK_STREAM, 0, fds);
NetconConnection *new_conn = client->addConnection(TCP_DATA, _phy.wrapSocket(fds[0], client));
new_conn->pcb = pcb;
TcpConnection *new_conn = new TcpConnection();
new_conn->dataSock = _phy.wrapSocket(fds[0], new_conn);
*uptr = new_conn;
new_conn->rpcSock = sock;
new_conn->pcb = newpcb;
new_conn->their_fd = fds[1];
PhySocket *sock = client->rpc->sock;
tcp_connections.push_back(new_conn);
sock_fd_write(_phy.getDescriptor(sock), fds[1]);
fprintf(stderr, "handle_socket(): socketpair = { our=%d, their=%d}\n", fds[0], fds[1]);
/* Once the client tells us what its fd is for the other end,
we can then complete the mapping */
client->unmapped_conn = new_conn;
new_conn->pending = true;
}
else {
fprintf(stderr, "handle_socket(): Memory not available for new PCB\n");
@ -847,23 +812,23 @@ void NetconEthernetTap::handle_socket(NetconClient *client, struct socket_st* so
* @param structure containing the data and parameters for this client's RPC
*
*/
void NetconEthernetTap::handle_connect(NetconClient *client, struct connect_st* connect_rpc)
void NetconEthernetTap::handle_connect(PhySocket *sock, void **uptr, struct connect_st* connect_rpc)
{
TcpConnection *conn = (TcpConnection*)*uptr;
struct sockaddr_in *connaddr;
connaddr = (struct sockaddr_in *) &connect_rpc->__addr;
int conn_port = lwipstack->ntohs(connaddr->sin_port);
ip_addr_t conn_addr = convert_ip((struct sockaddr_in *)&connect_rpc->__addr);
NetconConnection *c = client->getConnectionByTheirFD(connect_rpc->__fd);
if(c != NULL) {
lwipstack->tcp_sent(c->pcb, nc_sent); // FIXME: Move?
lwipstack->tcp_recv(c->pcb, nc_recved);
lwipstack->tcp_err(c->pcb, nc_err);
lwipstack->tcp_poll(c->pcb, nc_poll, APPLICATION_POLL_FREQ);
lwipstack->tcp_arg(c->pcb, new Larg(this, c->sock));
if(conn != NULL) {
lwipstack->tcp_sent(conn->pcb, nc_sent); // FIXME: Move?
lwipstack->tcp_recv(conn->pcb, nc_recved);
lwipstack->tcp_err(conn->pcb, nc_err);
lwipstack->tcp_poll(conn->pcb, nc_poll, APPLICATION_POLL_FREQ);
lwipstack->tcp_arg(conn->pcb, new Larg(this, conn));
int err = 0;
if((err = lwipstack->tcp_connect(c->pcb,&conn_addr,conn_port, nc_connected)) < 0)
if((err = lwipstack->tcp_connect(conn->pcb,&conn_addr,conn_port, nc_connected)) < 0)
{
fprintf(stderr, "handle_connect(): unable to connect\n");
// We should only return a value if failure happens immediately
@ -873,10 +838,10 @@ void NetconEthernetTap::handle_connect(NetconClient *client, struct connect_st*
// that's it!
// - Most instances of a retval for a connect() should happen
// in the nc_connect() and nc_err() callbacks!
send_return_value(client, err);
send_return_value(conn, err);
}
// Everything seems to be ok, but we don't have enough info to retval
client->waiting_for_retval=true;
conn->pending=true;
}
else {
fprintf(stderr, "could not locate PCB based on their fd\n");
@ -892,10 +857,10 @@ void NetconEthernetTap::handle_connect(NetconClient *client, struct connect_st*
*
* TODO: Optimize write logic (should we stop using poll?)
*/
void NetconEthernetTap::handle_write(NetconConnection *c)
void NetconEthernetTap::handle_write(TcpConnection *conn)
{
if(c) {
int sndbuf = c->pcb->snd_buf;
if(conn) {
int sndbuf = conn->pcb->snd_buf;
float avail = (float)sndbuf;
float max = (float)TCP_SND_BUF;
float load = 1.0 - (avail / max);
@ -904,21 +869,21 @@ void NetconEthernetTap::handle_write(NetconConnection *c)
return;
}
int sz, write_allowance = sndbuf < c->idx ? sndbuf : c->idx;
int sz, write_allowance = sndbuf < conn->idx ? sndbuf : conn->idx;
if(write_allowance > 0) {
// NOTE: this assumes that lwipstack->_lock is locked, either
// because we are in a callback or have locked it manually.
int err = lwipstack->_tcp_write(c->pcb, &c->buf, write_allowance, TCP_WRITE_FLAG_COPY);
int err = lwipstack->_tcp_write(conn->pcb, &conn->buf, write_allowance, TCP_WRITE_FLAG_COPY);
if(err != ERR_OK) {
fprintf(stderr, "handle_write(): error while writing to PCB\n");
return;
}
else {
sz = (c->idx)-write_allowance;
sz = (conn->idx)-write_allowance;
if(sz) {
memmove(&c->buf, (c->buf+write_allowance), sz);
memmove(&conn->buf, (conn->buf+write_allowance), sz);
}
c->idx -= write_allowance;
conn->idx -= write_allowance;
return;
}
}

30
netcon/NetconEthernetTap.hpp
View File

@ -104,12 +104,14 @@ private:
static err_t nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err);
// RPC handlers (from NetconIntercept)
void handle_bind(NetconClient *client, struct bind_st *bind_rpc);
void handle_listen(NetconClient *client, struct listen_st *listen_rpc);
void handle_retval(NetconClient *client, unsigned char* buf);
void handle_socket(NetconClient *client, struct socket_st* socket_rpc);
void handle_connect(NetconClient *client, struct connect_st* connect_rpc);
void handle_write(NetconConnection *c);
void handle_bind(PhySocket *sock, void **uptr, struct bind_st *bind_rpc);
void handle_listen(PhySocket *sock, void **uptr, struct listen_st *listen_rpc);
void handle_retval(PhySocket *sock, void **uptr, unsigned char* buf);
void handle_socket(PhySocket *sock, void **uptr, struct socket_st* socket_rpc);
void handle_connect(PhySocket *sock, void **uptr, struct connect_st* connect_rpc);
void handle_write(TcpConnection *conn);
int send_return_value(TcpConnection *conn, int retval);
void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *from,void *data,unsigned long len);
void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success);
@ -122,7 +124,6 @@ private:
void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len);
void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable);
int send_return_value(NetconClient *client, int retval);
ip_addr_t convert_ip(struct sockaddr_in * addr)
{
@ -137,18 +138,19 @@ private:
}
// Client helpers
NetconConnection *getConnectionByThisFD(int fd);
NetconConnection *getConnectionByPCB(struct tcp_pcb *pcb);
NetconClient *getClientByPCB(struct tcp_pcb *pcb);
void closeAllClients();
void closeConnection(NetconConnection *conn);
TcpConnection *getConnectionByTheirFD(int fd);
TcpConnection *getConnectionByPCB(struct tcp_pcb *pcb);
void closeConnection(TcpConnection *conn);
void closeAll();
void closeClient(NetconClient *client);
void closeClient(PhySocket *sock);
Phy<NetconEthernetTap *> _phy;
PhySocket *_unixListenSocket;
std::vector<NetconClient*> clients;
std::vector<TcpConnection*> tcp_connections;
std::vector<PhySocket*> rpc_sockets;
netif interface;
MAC _mac;

106
netcon/NetconService.hpp
View File

@ -41,10 +41,29 @@ using namespace std;
namespace ZeroTier {
enum NetconConnectionType { RPC, TCP_DATA };
class NetconEthernetTap;
// prototypes
class TcpConnection;
/*
*
*/
class TcpConnection
{
public:
int perceived_fd;
int their_fd;
bool pending;
PhySocket *rpcSock;
PhySocket *dataSock;
struct tcp_pcb *pcb;
unsigned char buf[DEFAULT_READ_BUFFER_SIZE];
int idx;
};
/*
* A helper class for passing a reference to _phy to LWIP callbacks as a "state"
*/
@ -52,90 +71,11 @@ namespace ZeroTier {
{
public:
NetconEthernetTap *tap;
PhySocket *sock;
Larg(NetconEthernetTap *_tap, PhySocket *_sock) : tap(_tap), sock(_sock) {}
TcpConnection *conn;
Larg(NetconEthernetTap *_tap, TcpConnection *conn) : tap(_tap), conn(conn) {}
};
// prototypes
class NetconClient;
class NetconConnection;
/*
* A data connection, any number of these may be associated with a NetconClient
*/
class NetconConnection
{
public:
int perceived_fd;
int their_fd;
unsigned char buf[DEFAULT_READ_BUFFER_SIZE];
int idx;
NetconConnectionType type;
struct tcp_pcb *pcb;
PhySocket *sock;
NetconClient *owner;
NetconConnection(NetconConnectionType type, PhySocket *sock) : type(type), sock(sock) {}
};
/*
* A "harnessed" client with associated rpc and data connections.
*/
class NetconClient
{
public:
vector<NetconConnection*> connections; // TODO: Switch to storing the actual object here
int tid;
bool waiting_for_retval;
NetconConnection *rpc;
NetconConnection* unmapped_conn;
NetconConnection *addConnection(NetconConnectionType type, PhySocket *sock)
{
NetconConnection *new_conn = new NetconConnection(type, sock);
new_conn->owner = this;
return new_conn;
}
// Check data and RPC connections
NetconConnection *getConnection(PhySocket *sock)
{
if(sock && sock == rpc->sock) {
return rpc;
}
for(size_t i=0; i<connections.size(); i++) {
if(sock == connections[i]->sock) return connections[i];
}
return NULL;
}
//
NetconConnection *getConnectionByTheirFD(int fd)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->perceived_fd == fd) return connections[i];
}
return NULL;
}
//
NetconConnection *getConnectionByPCB(struct tcp_pcb *pcb)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->pcb == pcb) return connections[i];
}
return NULL;
}
NetconConnection *containsPCB(struct tcp_pcb *pcb)
{
for(size_t i=0; i<connections.size(); i++) {
if(connections[i]->pcb == pcb) return connections[i];
}
return NULL;
}
};
} // namespace ZeroTier
#endif