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refactor in progress

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This commit is contained in:
Joseph Henry 2015-09-10 16:52:18 -04:00
parent 637da383f5
commit f4d3c995bc
3 changed files with 134 additions and 122 deletions
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152
netcon/NetconEthernetTap.cpp
View File

@ -202,16 +202,6 @@ void NetconEthernetTap::threadMain()
tv_sel.tv_sec = 0;
tv_sel.tv_usec = min_time;
// Assemble/copy our fd_sets to poll on
if(nc_service->possible_state_change) {
nc_service->assemble_fd_sets();
}
memcpy(&(nc_service->fdset), &(nc_service->cached_fdset), sizeof(nc_service->cached_fdset));
memcpy(&(nc_service->exfdset), &(nc_service->cached_exfdset), sizeof(nc_service->cached_exfdset));
memcpy(&(nc_service->alltypes), &(nc_service->cached_alltypes), sizeof(nc_service->cached_alltypes));
nc_service->maxfd = nc_service->cached_maxfd;
nc_service->sz = nc_service->cached_sz;
_phy.poll(min_time * 1000); // conversion from usec to millisec, TODO: double check
}
@ -229,7 +219,10 @@ void NetconEthernetTap::phyOnTcpWritable(PhySocket *sock,void **uptr) {}
void NetconEthernetTap::phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN)
{
_phy.setuptr(sockN, new NIntercept());
NetconClient newClient = new NetconClient();
newClient->rpc = new NetconConnection();
newClient->rpc->type = NetconConnectionType.RPC;
newClient->rpc->sock = *uptrN;
}
void NetconEthernetTap::phyOnUnixClose(PhySocket *sock,void **uptr)
@ -240,15 +233,12 @@ void NetconEthernetTap::phyOnUnixClose(PhySocket *sock,void **uptr)
void NetconEthernetTap::phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len)
{
NIntercept *h = (NIntercept*)_phy.getuptr(sock);
NetconConnection *c = *uptr->getConnection(sock);
int r;
nc_service->possible_state_change = true;
if(sws->uptr->type == NetconSocketType.BUFFER) {
NetconConnection* c = nc_service->get_connection_by_buf_sock(sws->sock);
if(c->type == NetconConnectionType.BUFFER) {
if(c) {
if(c->idx < DEFAULT_READ_BUFFER_SIZE) {
//tcp_output(c->pcb);
if((r = read(sws->sock, (&c->buf)+c->idx, DEFAULT_READ_BUFFER_SIZE-(c->idx))) > 0) {
c->idx += r;
handle_write(c);
@ -259,46 +249,46 @@ void NetconEthernetTap::phyOnUnixData(PhySocket *sock,void **uptr,void *data,uns
//dwr(-1, "can't find connection for this fd: %d\n", ns->allfds[i].fd);
}
}
if(sws->uptr->type == NetconSocketType.RPC)
if(c->type == NetconConnectionType.RPC)
{
NetconIntercept *h = nc_service->get_intercept_by_rpc(sws->sock);
NetconClient client = (NetconClient*)*uptr;
switch(data[0])
{
case RPC_SOCKET:
struct socket_st socket_rpc;
memcpy(&socket_rpc, &data[1], sizeof(struct socket_st));
h->tid = socket_rpc.__tid;
client->tid = socket_rpc.__tid;
//dwr(h->tid,"__RPC_SOCKET\n");
handle_socket(h, &socket_rpc);
handle_socket(client, &socket_rpc);
break;
case RPC_LISTEN:
struct listen_st listen_rpc;
memcpy(&listen_rpc, &data[1], sizeof(struct listen_st));
h->tid = listen_rpc.__tid;
client->tid = listen_rpc.__tid;
//dwr(h->tid,"__RPC_LISTEN\n");
handle_listen(h, &listen_rpc);
handle_listen(client, &listen_rpc);
break;
case RPC_BIND:
struct bind_st bind_rpc;
memcpy(&bind_rpc, &data[1], sizeof(struct bind_st));
h->tid = bind_rpc.__tid;
client->tid = bind_rpc.__tid;
//dwr(h->tid,"__RPC_BIND\n");
handle_bind(h, &bind_rpc);
handle_bind(client, &bind_rpc);
break;
case RPC_KILL_INTERCEPT:
//dwr(h->tid,"__RPC_KILL_INTERCEPT\n");
handle_kill_intercept(h);
handle_kill_intercept(client);
break;
case RPC_CONNECT:
struct connect_st connect_rpc;
memcpy(&connect_rpc, &data[1], sizeof(struct connect_st));
h->tid = connect_rpc.__tid;
client->tid = connect_rpc.__tid;
//dwr("__RPC_CONNECT\n");
handle_connect(h, &connect_rpc);
break;
case RPC_FD_MAP_COMPLETION:
//dwr("__RPC_FD_MAP_COMPLETION\n");
handle_retval(h, data);
handle_retval(client, data);
break;
default:
break;
@ -310,18 +300,6 @@ void NetconEthernetTap::phyOnUnixWritable(PhySocket *sock,void **uptr)
{
}
void NetconEthernetTap::handle_kill_intercept(NetconIntercept* h) {
nc_service->possible_state_change = true;
// Close all owned connections
for(size_t i=0; i<h->owned_connections.size(); i++) {
nc_close(h->owned_connections[i]->pcb);
close(h->owned_connections[i]->our_fd);
}
// Close RPC socketpair for this intercept
close(h->rpc);
nc_service->remove_intercept(h);
}
int NetconEthernetTap::send_return_value(NetconIntercept *h, int retval)
{
if(!h->waiting_for_retval){
@ -362,7 +340,6 @@ 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)
{
nc_service->possible_state_change = true;
NetconConnection *c = nc_service->get_connection_by_buf_sock((intptr_t)arg);
if(c && c->owner) {
// Generate new socketpair and Connection. Use newly-allocated PCB
@ -422,7 +399,6 @@ err_t NetconEthernetTap::nc_recved(void *arg, struct tcp_pcb *tpcb, struct pbuf
nc_close(tpcb);
close(c->our_fd); /* TODO: Check logic */
nc_service->remove_connection(c);
nc_service->possible_state_change = true;
}
else {
//dwr(-1, "can't locate connection via (arg)\n");
@ -451,7 +427,6 @@ err_t NetconEthernetTap::nc_recved(void *arg, struct tcp_pcb *tpcb, struct pbuf
void NetconEthernetTap::nc_err(void *arg, err_t err)
{
nc_service->possible_state_change = true;
NetconConnection *c = nc_service->get_connection_by_this_fd((intptr_t)arg);
if(c) {
//dwr(c->owner->tid, "nc_err: %s\n", lwiperror(err));
@ -467,8 +442,6 @@ void NetconEthernetTap::nc_err(void *arg, err_t err)
void NetconEthernetTap::nc_close(struct tcp_pcb* tpcb)
{
nc_service->possible_state_change = true;
NetconConnection *c = nc_service->get_connection_by_pcb(tpcb);
if(c) {
//dwr(c->owner->tid, "nc_close(): closing connection (their=%d, our=%d)\n", c->their_fd, c->our_fd);
@ -500,8 +473,7 @@ err_t NetconEthernetTap::nc_sent(void* arg, struct tcp_pcb *tpcb, u16_t len)
err_t NetconEthernetTap::nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err)
{
nc_service->possible_state_change = true;
NetconIntercept *h = nc_service->get_intercept_by_pcb(tpcb);
NetconClient *client = nc_service->get_intercept_by_pcb(tpcb);
if(h) {
//dwr(h->tid, "nc_connected()\n");
send_return_value(h,err);
@ -513,7 +485,7 @@ err_t NetconEthernetTap::nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err
----------------------------- RPC Handler functions ----------------------------
------------------------------------------------------------------------------*/
void NetconEthernetTap::handle_bind(NetconIntercept *h, struct bind_st *bind_rpc)
void NetconEthernetTap::handle_bind(NetconClient *client, struct bind_st *bind_rpc)
{
// FIXME: Is this hack still needed?
struct sockaddr_in *connaddr;
@ -528,97 +500,88 @@ void NetconEthernetTap::handle_bind(NetconIntercept *h, struct bind_st *bind_rpc
bytes[1] = (ip >> 8) & 0xFF;
bytes[2] = (ip >> 16) & 0xFF;
bytes[3] = (ip >> 24) & 0xFF;
//dwr(h->tid, "binding to: %d.%d.%d.%d\n", bytes[0], bytes[1], bytes[2], bytes[3]);
NetconConnection *c = nc_service->get_connection_by_that_fd(h, bind_rpc->sockfd);
if(c)
{
// "binding to: %d.%d.%d.%d", bytes[0], bytes[1], bytes[2], bytes[3]
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);
if(err != ERR_OK) {
//dwr(h->tid, "ERROR: while binding to addr/port\n");
// error while binding to addr/port
}
else {
//dwr(h->tid, "bind successful (fd=%d)\n", bind_rpc->sockfd);
// bind successful
}
}
else {
//dwr(h->tid, "PCB not in CLOSED state. Ignoring BIND request.\n");
// PCB not in CLOSED state. Ignoring BIND request.
}
}
else {
//dwr(h->tid, "can't locate connection for PCB (%d)\n", bind_rpc->sockfd);
// can't locate connection for PCB
}
}
void NetconEthernetTap::handle_listen(NetconIntercept *h, struct listen_st *listen_rpc)
void NetconEthernetTap::handle_listen(NetconClient *client, struct listen_st *listen_rpc)
{
NetconConnection *c = nc_service->get_connection_by_that_fd(h, listen_rpc->sockfd);
NetconConnection *c = client->getConnectionByTheirFD(listen_rpc->sockfd);
if(c) {
//dwr(c->owner->tid, "listen(%d, backlog=%d) from (tid=%d)\n", listen_rpc->sockfd, listen_rpc->backlog, listen_rpc->__tid);
if(c->pcb->state == LISTEN) {
//dwr(c->owner->tid, "PCB is already in listening state.\n");
// PCB is already in listening state.
return;
}
struct tcp_pcb* listening_pcb = lwipstack->tcp_listen(c->pcb);
if(listening_pcb != NULL) {
//dwr(h->tid, "created new listening PCB\n");
c->pcb = listening_pcb;
lwipstack->tcp_accept(listening_pcb, nc_accept);
//dwr(h->tid, "tcp_arg(pcb, %d)\n", (void*)(intptr_t)c->our_fd);
lwipstack->tcp_arg(listening_pcb, (void*)(intptr_t)c->our_fd);
h->waiting_for_retval=true;
int our_fd = _phy.getDescriptor(c->sock);
lwipstack->tcp_arg(listening_pcb, (void*)(intptr_t)our_fd);
client->waiting_for_retval=true;
}
else {
//dwr(h->tid, "unable to allocate memory for new listening PCB\n");
// unable to allocate memory for new listening PCB
}
}
else {
//dwr(h->tid, "can't locate connection for PCB (%d)\n", listen_rpc->sockfd);
// can't locate connection for PCB
}
}
void NetconEthernetTap::handle_retval(NetconIntercept *h, unsigned char* buf)
void NetconEthernetTap::handle_retval(NetconClient *client, unsigned char* buf)
{
if(h->unmapped_conn != NULL) {
memcpy(&(h->unmapped_conn->their_fd), &buf[1], sizeof(int));
//dwr(h->tid, "intercept_fd(%d) -> service_fd(%d)\n",
// h->unmapped_conn->their_fd, h->unmapped_conn->our_fd);
if(client->unmapped_conn != NULL) {
memcpy(&(client->unmapped_conn->their_fd), &buf[1], sizeof(int));
h->unmapped_conn = NULL;
}
}
void NetconEthernetTap::handle_socket(NetconIntercept *h, struct socket_st* socket_rpc)
void NetconEthernetTap::handle_socket(NetconClient *client, struct socket_st* socket_rpc)
{
struct tcp_pcb *pcb = lwipstack->tcp_new();
if(pcb != NULL) {
int fd[2];
socketpair(PF_LOCAL, SOCK_STREAM, 0, fd);
NetconConnection* new_connection = nc_service->add_connection(h, h->tid, fd[0], -1, pcb);
//dwr(h->tid, "socketpair { fd[0]=%d, fd[1]=%d }\n", fd[0], fd[1]);
//dwr(h->tid, "connections = %d\n", nc_service->connections.size());
//dwr(h->tid, "added new socket entry\n");
//dwr(h->tid, "sending socketpair buffer fd... %d\n", fd[1]);
sock_fd_write(h->rpc, fd[1]);
int *their_fd;
NetconConnection new_conn = new NetconConnection();
new_conn->sock = _phy.createSocketPair(&their_fd, client);
new_conn->their_fd = their_fd;
new_conn->pcb = pcb;
new_conn->type = NetconConnectionType.BUFFER;
sock_fd_write(_phy.getDescriptor(client->rpc->sock), their_fd);
h->unmapped_conn = new_connection;
}
else {
//dwr(h->tid, "ERROR: Memory not available for new PCB\n");
// Memory not available for new PCB
}
}
void NetconEthernetTap::handle_connect(NetconIntercept *h, struct connect_st* connect_rpc)
void NetconEthernetTap::handle_connect(NetconClient *client, struct connect_st* connect_rpc)
{
// FIXME: Parse out address information -- Probably a more elegant way to do this
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 = nc_service->get_connection_by_that_fd(h, connect_rpc->__fd);
//print_ip(connaddr->sin_addr.s_addr);
NetconConnection *c = client->getConnectionByTheirFD(connect_rpc->__fd);
if(c!= NULL) {
//dwr(-1, "connect(): TCP_SNDBUF = %d\n", tcp_sndbuf(nc->pcb));
lwipstack->tcp_sent(c->pcb, nc_sent); // FIXME: Move?
lwipstack->tcp_recv(c->pcb, nc_recved);
lwipstack->tcp_err(c->pcb, nc_err);
@ -636,13 +599,13 @@ void NetconEthernetTap::handle_connect(NetconIntercept *h, struct connect_st* co
// that's it!
// - Most instances of a retval for a connect() should happen
// in the nc_connect() and nc_err() callbacks!
send_return_value(h, err);
send_return_value(client, err);
}
// Everything seems to be ok, but we don't have enough info to retval
h->waiting_for_retval=true;
client->waiting_for_retval=true;
}
else {
//dwr(h->tid, "ERROR: could not locate PCB based on their_fd (%d)", connect_rpc->__fd);
// could not locate PCB based on their fd
}
}
@ -650,7 +613,6 @@ void NetconEthernetTap::handle_write(NetconConnection *c)
{
if(c) {
int sndbuf = c->pcb->snd_buf;
float avail = (float)sndbuf;
float max = (float)TCP_SND_BUF;
float load = 1.0 - (avail / max);
@ -661,19 +623,15 @@ void NetconEthernetTap::handle_write(NetconConnection *c)
int write_allowance = sndbuf < c->idx ? sndbuf : c->idx;
int sz;
if(write_allowance > 0)
{
// FIXME: Copying data is expensive, we actually want TCP_WRITE_FLAG_MORE!
if(write_allowance > 0) {
int err = lwipstack->tcp_write(c->pcb, &c->buf, write_allowance, TCP_WRITE_FLAG_COPY);
if(err != ERR_OK) {
//dwr(c->owner->tid, "ERROR(%d): while writing to PCB, %s\n", err, lwiperror(err));
// error while writing to PCB
return;
}
else {
sz = (c->idx)-write_allowance;
if(sz) {
//printf(" w = %d\n\n", c->written);
//printf("sz = %d\n", (c->idx)-write_allowance);
memmove(&c->buf, (c->buf+write_allowance), sz);
}
c->idx -= write_allowance;
@ -682,12 +640,12 @@ void NetconEthernetTap::handle_write(NetconConnection *c)
}
}
else {
//dwr(c->owner->tid, "ERROR: lwIP stack full.\n");
// lwIP stack full
return;
}
}
else {
//dwr("ERROR: could not locate connection for this fd\n");
// could not locate connection for this fd
}
}

14
netcon/NetconEthernetTap.hpp
View File

@ -95,8 +95,7 @@ private:
void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len);
void phyOnUnixWritable(PhySocket *sock,void **uptr);
void handle_kill_intercept(NetconIntercept* h);
int send_return_value(NetconIntercept *h, int retval);
int send_return_value(NetconClient *client, int retval);
// For LWIP Callbacks
err_t nc_poll(void* arg, struct tcp_pcb *tpcb);
@ -109,11 +108,11 @@ private:
err_t nc_connected(void *arg, struct tcp_pcb *tpcb, err_t err);
// RPC handlers (from NetconIntercept)
void handle_bind(NetconIntercept *h, struct bind_st *bind_rpc);
void handle_listen(NetconIntercept *h, struct listen_st *listen_rpc);
void handle_retval(NetconIntercept *h, unsigned char* buf);
void handle_socket(NetconIntercept *h, struct socket_st* socket_rpc);
void handle_connect(NetconIntercept *h, struct connect_st* connect_rpc);
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 (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
@ -121,7 +120,6 @@ private:
// Logging helper
Phy<NetconEthernetTap *> _phy;
PhySocket *_unixListenSocket;

68
netcon/NetconService.h
View File

@ -27,6 +27,9 @@
#include <sys/poll.h>
#include <string>
#include "../osdep/Phy.hpp"
#include "Intercept.h"
#include "LWIPStack.hpp"
@ -35,19 +38,72 @@
using namespace std;
enum NetconSocketType { RPC, BUFFER };
namespace ZeroTier {
enum NetconConnectionType { RPC, BUFFER };
class NConnection
class NetconClient;
class NetconConnection;
//
class NetconConnection
{
NetconSocketType type;
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) {}
};
class Client
//
class NetconClient
{
private:
vector<NetconConnection*> connections;
public:
vector<NConnection*> connections;
int tid;
NetconConnection *rpc;
void addConnection(NetconConnectionType type, PhySocket *sock)
{
NetconConnection new_conn = new NetconConnection(type, sock);
new_conn->owner = this;
}
// Check data and RPC connections
NetconConnection *getConnection(PhySocket *sock)
{
if(sock && sock == rpc->sock) {
return rpc;
}
for(int i=0; i<connections.size(); i++) {
if(sock == connections[i]->sock) { return connections[i];}
}
return NULL;
}
//
NetconConnection *getConnectionByTheirFD(int fd)
{
for(int i=0; i<connections.size(); i++) {
if(connections[i]->their_fd == fd) { return connections[i]; }
}
}
//
NetconConnection *getConnectionByPCB(struct tcp_pcb *pcb)
{
for(int i=0; i<connections.size(); i++) {
if(connections[i]->pcb = pcb) { return connections[i]; }
}
}
void close()
{
@ -56,5 +112,5 @@ public:
// -- PhySocket
}
};
} // namespace ZeroTier
#endif