updated
This commit is contained in:
Joseph Henry
@@ -48,9 +48,11 @@
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#include "SDK_RPC.h"
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// lwIP structs
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struct tcp_pcb;
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struct udp_pcb;
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// ZT RPC structs
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struct socket_st;
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struct listen_st;
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struct bind_st;
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@@ -58,6 +60,7 @@ struct connect_st;
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struct getsockname_st;
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struct accept_st;
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// Timing
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#define APPLICATION_POLL_FREQ 2
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#define ZT_LWIP_TCP_TIMER_INTERVAL 50
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#define STATUS_TMR_INTERVAL 500 // How often we check connection statuses (in ms)
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@@ -78,429 +81,429 @@ struct accept_st;
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namespace ZeroTier {
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class NetconEthernetTap;
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class LWIPStack;
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/*
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* TCP connection
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*/
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struct Connection
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{
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bool listening, probation, disabled;
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int pid, txsz, rxsz, type;
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PhySocket *rpcSock, *sock;
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struct tcp_pcb *TCP_pcb;
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struct udp_pcb *UDP_pcb;
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struct sockaddr_storage *addr;
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unsigned short port;
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unsigned char txbuf[DEFAULT_TCP_TX_BUF_SZ];
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unsigned char rxbuf[DEFAULT_TCP_RX_BUF_SZ];
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// TODO: necessary still?
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bool unread_udp_packet;
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int proxy_conn_state;
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};
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/*
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* A helper for passing a reference to _phy to LWIP callbacks as a "state"
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*/
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struct Larg
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{
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NetconEthernetTap *tap;
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Connection *conn;
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Larg(NetconEthernetTap *_tap, Connection *conn) : tap(_tap), conn(conn) {}
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};
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/*
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* Network Containers instance -- emulates an Ethernet tap device as far as OneService knows
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*/
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class NetconEthernetTap
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{
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friend class Phy<NetconEthernetTap *>;
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public:
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NetconEthernetTap(
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const char *homePath,
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const MAC &mac,
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unsigned int mtu,
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unsigned int metric,
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uint64_t nwid,
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const char *friendlyName,
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void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
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void *arg);
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~NetconEthernetTap();
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void setEnabled(bool en);
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bool enabled() const;
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bool addIp(const InetAddress &ip);
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bool removeIp(const InetAddress &ip);
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std::vector<InetAddress> ips() const;
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void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
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std::string deviceName() const;
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void setFriendlyName(const char *friendlyName);
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void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
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void threadMain()
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throw();
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LWIPStack *lwipstack;
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uint64_t _nwid;
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void (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
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void *_arg;
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private:
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// LWIP callbacks
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// NOTE: these are called from within LWIP, meaning that lwipstack->_lock is ALREADY
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// locked in this case!
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class NetconEthernetTap;
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class LWIPStack;
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/*
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* Callback from LWIP for when a connection has been accepted and the PCB has been
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* put into an ACCEPT state.
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*
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* A socketpair is created, one end is kept and wrapped into a PhySocket object
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* for use in the main ZT I/O loop, and one end is sent to the client. The client
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* is then required to tell the service what new file descriptor it has allocated
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* for this connection. After the mapping is complete, the accepted socket can be
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* used.
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*
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* @param associated service state object
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* @param newly allocated PCB
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* @param error code
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* @return ERR_OK if everything is ok, -1 otherwise
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*
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* i := should be implemented in intercept lib
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* I := is implemented in intercept lib
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* X := is implemented in service
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* ? := required treatment Unknown
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* - := Not needed
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*
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* [ ] EAGAIN or EWOULDBLOCK - The socket is marked nonblocking and no connections are present
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* to be accepted. POSIX.1-2001 allows either error to be returned for
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* this case, and does not require these constants to have the same value,
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* so a portable application should check for both possibilities.
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* [I] EBADF - The descriptor is invalid.
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* [I] ECONNABORTED - A connection has been aborted.
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* [i] EFAULT - The addr argument is not in a writable part of the user address space.
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* [-] EINTR - The system call was interrupted by a signal that was caught before a valid connection arrived; see signal(7).
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* [I] EINVAL - Socket is not listening for connections, or addrlen is invalid (e.g., is negative).
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* [I] EINVAL - (accept4()) invalid value in flags.
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* [I] EMFILE - The per-process limit of open file descriptors has been reached.
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* [ ] ENFILE - The system limit on the total number of open files has been reached.
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* [ ] ENOBUFS, ENOMEM - Not enough free memory. This often means that the memory allocation is
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* limited by the socket buffer limits, not by the system memory.
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* [I] ENOTSOCK - The descriptor references a file, not a socket.
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* [I] EOPNOTSUPP - The referenced socket is not of type SOCK_STREAM.
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* [ ] EPROTO - Protocol error.
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*
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* TCP connection
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*/
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static err_t nc_accept(void *arg, struct tcp_pcb *newPCB, err_t err);
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/*
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* Callback from LWIP for when data is available to be read from the network.
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*
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* Data is in the form of a linked list of struct pbufs, it is then recombined and
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* send to the client over the associated unix socket.
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*
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* @param associated service state object
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* @param allocated PCB
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* @param chain of pbufs
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* @param error code
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* @return ERR_OK if everything is ok, -1 otherwise
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*
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*/
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static err_t nc_recved(void *arg, struct tcp_pcb *PCB, struct pbuf *p, err_t err);
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static err_t nc_recved_proxy(void *arg, struct tcp_pcb *PCB, struct pbuf *p, err_t err);
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static void nc_udp_recved(void * arg, struct udp_pcb * upcb, struct pbuf * p, struct ip_addr * addr, u16_t port);
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/*
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* Callback from LWIP when an internal error is associtated with the given (arg)
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*
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* Since the PCB related to this error might no longer exist, only its perviously
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* associated (arg) is provided to us.
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*
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* @param associated service state object
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* @param error code
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*
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*/
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static void nc_err(void *arg, err_t err);
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/*
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* Callback from LWIP to do whatever work we might need to do.
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*
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* @param associated service state object
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* @param PCB we're polling on
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* @return ERR_OK if everything is ok, -1 otherwise
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*
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*/
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static err_t nc_poll(void* arg, struct tcp_pcb *PCB);
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/*
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* Callback from LWIP to signal that 'len' bytes have successfully been sent.
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* As a result, we should put our socket back into a notify-on-readability state
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* since there is now room on the PCB buffer to write to.
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*
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* NOTE: This could be used to track the amount of data sent by a connection.
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*
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* @param associated service state object
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* @param relevant PCB
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* @param length of data sent
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* @return ERR_OK if everything is ok, -1 otherwise
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*
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*/
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static err_t nc_sent(void *arg, struct tcp_pcb *PCB, u16_t len);
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/*
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* Callback from LWIP which sends a return value to the client to signal that
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* a connection was established for this PCB
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*
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* @param associated service state object
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* @param relevant PCB
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* @param error code
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* @return ERR_OK if everything is ok, -1 otherwise
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*
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*/
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static err_t nc_connected(void *arg, struct tcp_pcb *PCB, err_t err);
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static err_t nc_connected_proxy(void *arg, struct tcp_pcb *PCB, err_t err);
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//static void nc_close(struct tcp_pcb *PCB);
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//static err_t nc_send(struct tcp_pcb *PCB);
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/*
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* Handles an RPC to bind an LWIP PCB to a given address and port
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*
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* @param PhySocket associated with this RPC connection
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* @param structure containing the data and parameters for this client's RPC
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*
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i := should be implemented in intercept lib
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I := is implemented in intercept lib
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X := is implemented in service
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? := required treatment Unknown
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- := Not needed
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[ ] EACCES - The address is protected, and the user is not the superuser.
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[X] EADDRINUSE - The given address is already in use.
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[I] EBADF - sockfd is not a valid descriptor.
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[X] EINVAL - The socket is already bound to an address.
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[I] ENOTSOCK - sockfd is a descriptor for a file, not a socket.
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[X] ENOMEM - Insufficient kernel memory was available.
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- The following errors are specific to UNIX domain (AF_UNIX) sockets:
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[-] EACCES - Search permission is denied on a component of the path prefix. (See also path_resolution(7).)
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[-] EADDRNOTAVAIL - A nonexistent interface was requested or the requested address was not local.
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[-] EFAULT - addr points outside the user's accessible address space.
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[-] EINVAL - The addrlen is wrong, or the socket was not in the AF_UNIX family.
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[-] ELOOP - Too many symbolic links were encountered in resolving addr.
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[-] ENAMETOOLONG - s addr is too long.
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[-] ENOENT - The file does not exist.
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[-] ENOTDIR - A component of the path prefix is not a directory.
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[-] EROFS - The socket inode would reside on a read-only file system.
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*/
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void handleBind(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct bind_st *bind_rpc);
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/*
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* Handles an RPC to put an LWIP PCB into LISTEN mode
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*
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* @param PhySocket associated with this RPC connection
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* @param structure containing the data and parameters for this client's RPC
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*
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i := should be implemented in intercept lib
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I := is implemented in intercept lib
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X := is implemented in service
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? := required treatment Unknown
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- := Not needed
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[?] EADDRINUSE - Another socket is already listening on the same port.
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[IX] EBADF - The argument sockfd is not a valid descriptor.
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[I] ENOTSOCK - The argument sockfd is not a socket.
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[I] EOPNOTSUPP - The socket is not of a type that supports the listen() operation.
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*/
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void handleListen(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct listen_st *listen_rpc);
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/*
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* Handles an RPC to create a socket (LWIP PCB and associated socketpair)
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*
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* A socketpair is created, one end is kept and wrapped into a PhySocket object
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* for use in the main ZT I/O loop, and one end is sent to the client. The client
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* is then required to tell the service what new file descriptor it has allocated
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* for this connection. After the mapping is complete, the socket can be used.
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*
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* @param PhySocket associated with this RPC connection
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* @param structure containing the data and parameters for this client's RPC
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*
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i := should be implemented in intercept lib
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I := is implemented in intercept lib
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X := is implemented in service
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? := required treatment Unknown
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- := Not needed
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[-] EACCES - Permission to create a socket of the specified type and/or protocol is denied.
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[I] EAFNOSUPPORT - The implementation does not support the specified address family.
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[I] EINVAL - Unknown protocol, or protocol family not available.
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[I] EINVAL - Invalid flags in type.
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[I] EMFILE - Process file table overflow.
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[?] ENFILE - The system limit on the total number of open files has been reached.
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[X] ENOBUFS or ENOMEM - Insufficient memory is available. The socket cannot be created until sufficient resources are freed.
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[?] EPROTONOSUPPORT - The protocol type or the specified protocol is not supported within this domain.
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*/
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Connection * handleSocket(PhySocket *sock, void **uptr, struct socket_st* socket_rpc);
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Connection * handleSocketProxy(PhySocket *sock, int socket_type);
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/*
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* Handles an RPC to connect to a given address and port
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*
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* @param PhySocket associated with this RPC connection
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* @param structure containing the data and parameters for this client's RPC
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--- Error handling in this method will only catch problems which are immedately
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apprent. Some errors will need to be caught in the nc_connected(0 callback
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i := should be implemented in intercept lib
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I := is implemented in intercept lib
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X := is implemented in service
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? := required treatment Unknown
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- := Not needed
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[-] EACCES - For UNIX domain sockets, which are identified by pathname: Write permission is denied ...
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[?] EACCES, EPERM - The user tried to connect to a broadcast address without having the socket broadcast flag enabled ...
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[X] EADDRINUSE - Local address is already in use.
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[I] EAFNOSUPPORT - The passed address didn't have the correct address family in its sa_family field.
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[X] EAGAIN - No more free local ports or insufficient entries in the routing cache.
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[ ] EALREADY - The socket is nonblocking and a previous connection attempt has not yet been completed.
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[IX] EBADF - The file descriptor is not a valid index in the descriptor table.
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[ ] ECONNREFUSED - No-one listening on the remote address.
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[i] EFAULT - The socket structure address is outside the user's address space.
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[ ] EINPROGRESS - The socket is nonblocking and the connection cannot be completed immediately.
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[-] EINTR - The system call was interrupted by a signal that was caught.
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[X] EISCONN - The socket is already connected.
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[X] ENETUNREACH - Network is unreachable.
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[I] ENOTSOCK - The file descriptor is not associated with a socket.
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[X] ETIMEDOUT - Timeout while attempting connection.
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[X] EINVAL - Invalid argument, SVr4, generally makes sense to set this
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*/
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void handleConnect(PhySocket *sock, PhySocket *rpcsock, Connection *conn, struct connect_st* connect_rpc);
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int handleConnectProxy(PhySocket *sock, struct sockaddr_in *rawAddr);
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// void handleIsConnected();
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/*
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* Return the address that the socket is bound to
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*/
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void handleGetsockname(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct getsockname_st *getsockname_rpc);
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/*
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* Writes data from the application's socket to the LWIP connection
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*/
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void handleWrite(Connection *conn);
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/*
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* Sends a return value to the intercepted application
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*/
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int sendReturnValue(PhySocket *sock, int retval, int _errno);
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int sendReturnValue(int fd, int retval, int _errno);
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/*
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* Unpacks the buffer from an RPC command
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*/
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void unloadRPC(void *data, pid_t &pid, pid_t &tid,
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int &rpc_count, char (timestamp[RPC_TIMESTAMP_SZ]), char (magic[sizeof(uint64_t)]), char &cmd, void* &payload);
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// Unused -- no UDP or TCP from this thread/Phy<>
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void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *local_address, const struct sockaddr *from,void *data,unsigned long len);
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void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success);
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void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN,const struct sockaddr *from);
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void phyOnTcpClose(PhySocket *sock,void **uptr);
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void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len);
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void processReceivedData(PhySocket *sock,void **uptr,bool lwip_invoked);
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void phyOnTcpWritable(PhySocket *sock,void **uptr,bool lwip_invoked);
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/*
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* Signals us to close the TcpConnection associated with this PhySocket
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*/
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void phyOnUnixClose(PhySocket *sock,void **uptr);
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/*
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* Notifies us that there is data to be read from an application's socket
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*/
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void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len);
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/*
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* Notifies us that we can write to an application's socket
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*/
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void phyOnUnixWritable(PhySocket *sock,void **uptr,bool lwip_invoked);
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/*
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* Returns a pointer to a TcpConnection associated with a given PhySocket
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*/
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Connection *getConnection(PhySocket *sock);
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/*
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* Closes a TcpConnection, associated LWIP PCB strcuture,
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* PhySocket, and underlying file descriptor
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*/
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void closeConnection(PhySocket *sock);
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// --- Proxy stubs
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int proxyListenPort;
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//std::map<int,PhySocket> proxySockStates;
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int sockstate;
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int proxyListenSocket;
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PhySocket *proxyListenPhySocket;
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void StartProxy(const char *nwid);
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void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable);
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// --- end Proxy stubs
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ip_addr_t convert_ip(struct sockaddr_in * addr)
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struct Connection
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{
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ip_addr_t conn_addr;
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struct sockaddr_in *ipv4 = addr;
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short a = ip4_addr1(&(ipv4->sin_addr));
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short b = ip4_addr2(&(ipv4->sin_addr));
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short c = ip4_addr3(&(ipv4->sin_addr));
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short d = ip4_addr4(&(ipv4->sin_addr));
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IP4_ADDR(&conn_addr, a,b,c,d);
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return conn_addr;
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}
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bool listening, probation, disabled;
|
||||
int pid, txsz, rxsz, type;
|
||||
PhySocket *rpcSock, *sock;
|
||||
struct tcp_pcb *TCP_pcb;
|
||||
struct udp_pcb *UDP_pcb;
|
||||
struct sockaddr_storage *addr;
|
||||
unsigned short port;
|
||||
unsigned char txbuf[DEFAULT_TCP_TX_BUF_SZ];
|
||||
unsigned char rxbuf[DEFAULT_TCP_RX_BUF_SZ];
|
||||
|
||||
// TODO: necessary still?
|
||||
bool unread_udp_packet;
|
||||
int proxy_conn_state;
|
||||
};
|
||||
|
||||
Phy<NetconEthernetTap *> _phy;
|
||||
PhySocket *_unixListenSocket;
|
||||
/*
|
||||
* A helper for passing a reference to _phy to LWIP callbacks as a "state"
|
||||
*/
|
||||
struct Larg
|
||||
{
|
||||
NetconEthernetTap *tap;
|
||||
Connection *conn;
|
||||
Larg(NetconEthernetTap *_tap, Connection *conn) : tap(_tap), conn(conn) {}
|
||||
};
|
||||
|
||||
std::vector<Connection*> _Connections;
|
||||
|
||||
std::map<uint64_t, std::pair<PhySocket*, void*> > jobmap;
|
||||
/*
|
||||
* Network Containers instance -- emulates an Ethernet tap device as far as OneService knows
|
||||
*/
|
||||
class NetconEthernetTap
|
||||
{
|
||||
friend class Phy<NetconEthernetTap *>;
|
||||
|
||||
pid_t rpcCounter;
|
||||
netif interface;
|
||||
public:
|
||||
NetconEthernetTap(
|
||||
const char *homePath,
|
||||
const MAC &mac,
|
||||
unsigned int mtu,
|
||||
unsigned int metric,
|
||||
uint64_t nwid,
|
||||
const char *friendlyName,
|
||||
void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
|
||||
void *arg);
|
||||
|
||||
MAC _mac;
|
||||
Thread _thread;
|
||||
std::string _homePath;
|
||||
std::string _dev; // path to Unix domain socket
|
||||
~NetconEthernetTap();
|
||||
|
||||
std::vector<MulticastGroup> _multicastGroups;
|
||||
Mutex _multicastGroups_m;
|
||||
void setEnabled(bool en);
|
||||
bool enabled() const;
|
||||
bool addIp(const InetAddress &ip);
|
||||
bool removeIp(const InetAddress &ip);
|
||||
std::vector<InetAddress> ips() const;
|
||||
void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
|
||||
std::string deviceName() const;
|
||||
void setFriendlyName(const char *friendlyName);
|
||||
void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
|
||||
|
||||
std::vector<InetAddress> _ips;
|
||||
Mutex _ips_m, _tcpconns_m, _rx_buf_m, _close_m;
|
||||
void threadMain()
|
||||
throw();
|
||||
|
||||
unsigned int _mtu;
|
||||
volatile bool _enabled;
|
||||
volatile bool _run;
|
||||
};
|
||||
LWIPStack *lwipstack;
|
||||
uint64_t _nwid;
|
||||
void (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
|
||||
void *_arg;
|
||||
|
||||
private:
|
||||
// LWIP callbacks
|
||||
// NOTE: these are called from within LWIP, meaning that lwipstack->_lock is ALREADY
|
||||
// locked in this case!
|
||||
|
||||
/*
|
||||
* Callback from LWIP for when a connection has been accepted and the PCB has been
|
||||
* put into an ACCEPT state.
|
||||
*
|
||||
* A socketpair is created, one end is kept and wrapped into a PhySocket object
|
||||
* for use in the main ZT I/O loop, and one end is sent to the client. The client
|
||||
* is then required to tell the service what new file descriptor it has allocated
|
||||
* for this connection. After the mapping is complete, the accepted socket can be
|
||||
* used.
|
||||
*
|
||||
* @param associated service state object
|
||||
* @param newly allocated PCB
|
||||
* @param error code
|
||||
* @return ERR_OK if everything is ok, -1 otherwise
|
||||
*
|
||||
* i := should be implemented in intercept lib
|
||||
* I := is implemented in intercept lib
|
||||
* X := is implemented in service
|
||||
* ? := required treatment Unknown
|
||||
* - := Not needed
|
||||
*
|
||||
* [ ] EAGAIN or EWOULDBLOCK - The socket is marked nonblocking and no connections are present
|
||||
* to be accepted. POSIX.1-2001 allows either error to be returned for
|
||||
* this case, and does not require these constants to have the same value,
|
||||
* so a portable application should check for both possibilities.
|
||||
* [I] EBADF - The descriptor is invalid.
|
||||
* [I] ECONNABORTED - A connection has been aborted.
|
||||
* [i] EFAULT - The addr argument is not in a writable part of the user address space.
|
||||
* [-] EINTR - The system call was interrupted by a signal that was caught before a valid connection arrived; see signal(7).
|
||||
* [I] EINVAL - Socket is not listening for connections, or addrlen is invalid (e.g., is negative).
|
||||
* [I] EINVAL - (accept4()) invalid value in flags.
|
||||
* [I] EMFILE - The per-process limit of open file descriptors has been reached.
|
||||
* [ ] ENFILE - The system limit on the total number of open files has been reached.
|
||||
* [ ] ENOBUFS, ENOMEM - Not enough free memory. This often means that the memory allocation is
|
||||
* limited by the socket buffer limits, not by the system memory.
|
||||
* [I] ENOTSOCK - The descriptor references a file, not a socket.
|
||||
* [I] EOPNOTSUPP - The referenced socket is not of type SOCK_STREAM.
|
||||
* [ ] EPROTO - Protocol error.
|
||||
*
|
||||
*/
|
||||
static err_t nc_accept(void *arg, struct tcp_pcb *newPCB, err_t err);
|
||||
|
||||
/*
|
||||
* Callback from LWIP for when data is available to be read from the network.
|
||||
*
|
||||
* Data is in the form of a linked list of struct pbufs, it is then recombined and
|
||||
* send to the client over the associated unix socket.
|
||||
*
|
||||
* @param associated service state object
|
||||
* @param allocated PCB
|
||||
* @param chain of pbufs
|
||||
* @param error code
|
||||
* @return ERR_OK if everything is ok, -1 otherwise
|
||||
*
|
||||
*/
|
||||
static err_t nc_recved(void *arg, struct tcp_pcb *PCB, struct pbuf *p, err_t err);
|
||||
static err_t nc_recved_proxy(void *arg, struct tcp_pcb *PCB, struct pbuf *p, err_t err);
|
||||
static void nc_udp_recved(void * arg, struct udp_pcb * upcb, struct pbuf * p, struct ip_addr * addr, u16_t port);
|
||||
|
||||
|
||||
/*
|
||||
* Callback from LWIP when an internal error is associtated with the given (arg)
|
||||
*
|
||||
* Since the PCB related to this error might no longer exist, only its perviously
|
||||
* associated (arg) is provided to us.
|
||||
*
|
||||
* @param associated service state object
|
||||
* @param error code
|
||||
*
|
||||
*/
|
||||
static void nc_err(void *arg, err_t err);
|
||||
|
||||
/*
|
||||
* Callback from LWIP to do whatever work we might need to do.
|
||||
*
|
||||
* @param associated service state object
|
||||
* @param PCB we're polling on
|
||||
* @return ERR_OK if everything is ok, -1 otherwise
|
||||
*
|
||||
*/
|
||||
static err_t nc_poll(void* arg, struct tcp_pcb *PCB);
|
||||
|
||||
/*
|
||||
* Callback from LWIP to signal that 'len' bytes have successfully been sent.
|
||||
* As a result, we should put our socket back into a notify-on-readability state
|
||||
* since there is now room on the PCB buffer to write to.
|
||||
*
|
||||
* NOTE: This could be used to track the amount of data sent by a connection.
|
||||
*
|
||||
* @param associated service state object
|
||||
* @param relevant PCB
|
||||
* @param length of data sent
|
||||
* @return ERR_OK if everything is ok, -1 otherwise
|
||||
*
|
||||
*/
|
||||
static err_t nc_sent(void *arg, struct tcp_pcb *PCB, u16_t len);
|
||||
|
||||
/*
|
||||
* Callback from LWIP which sends a return value to the client to signal that
|
||||
* a connection was established for this PCB
|
||||
*
|
||||
* @param associated service state object
|
||||
* @param relevant PCB
|
||||
* @param error code
|
||||
* @return ERR_OK if everything is ok, -1 otherwise
|
||||
*
|
||||
*/
|
||||
static err_t nc_connected(void *arg, struct tcp_pcb *PCB, err_t err);
|
||||
static err_t nc_connected_proxy(void *arg, struct tcp_pcb *PCB, err_t err);
|
||||
|
||||
|
||||
//static void nc_close(struct tcp_pcb *PCB);
|
||||
//static err_t nc_send(struct tcp_pcb *PCB);
|
||||
|
||||
/*
|
||||
* Handles an RPC to bind an LWIP PCB to a given address and port
|
||||
*
|
||||
* @param PhySocket associated with this RPC connection
|
||||
* @param structure containing the data and parameters for this client's RPC
|
||||
*
|
||||
|
||||
i := should be implemented in intercept lib
|
||||
I := is implemented in intercept lib
|
||||
X := is implemented in service
|
||||
? := required treatment Unknown
|
||||
- := Not needed
|
||||
|
||||
[ ] EACCES - The address is protected, and the user is not the superuser.
|
||||
[X] EADDRINUSE - The given address is already in use.
|
||||
[I] EBADF - sockfd is not a valid descriptor.
|
||||
[X] EINVAL - The socket is already bound to an address.
|
||||
[I] ENOTSOCK - sockfd is a descriptor for a file, not a socket.
|
||||
|
||||
[X] ENOMEM - Insufficient kernel memory was available.
|
||||
|
||||
- The following errors are specific to UNIX domain (AF_UNIX) sockets:
|
||||
|
||||
[-] EACCES - Search permission is denied on a component of the path prefix. (See also path_resolution(7).)
|
||||
[-] EADDRNOTAVAIL - A nonexistent interface was requested or the requested address was not local.
|
||||
[-] EFAULT - addr points outside the user's accessible address space.
|
||||
[-] EINVAL - The addrlen is wrong, or the socket was not in the AF_UNIX family.
|
||||
[-] ELOOP - Too many symbolic links were encountered in resolving addr.
|
||||
[-] ENAMETOOLONG - s addr is too long.
|
||||
[-] ENOENT - The file does not exist.
|
||||
[-] ENOTDIR - A component of the path prefix is not a directory.
|
||||
[-] EROFS - The socket inode would reside on a read-only file system.
|
||||
*/
|
||||
void handleBind(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct bind_st *bind_rpc);
|
||||
|
||||
/*
|
||||
* Handles an RPC to put an LWIP PCB into LISTEN mode
|
||||
*
|
||||
* @param PhySocket associated with this RPC connection
|
||||
* @param structure containing the data and parameters for this client's RPC
|
||||
*
|
||||
|
||||
i := should be implemented in intercept lib
|
||||
I := is implemented in intercept lib
|
||||
X := is implemented in service
|
||||
? := required treatment Unknown
|
||||
- := Not needed
|
||||
|
||||
[?] EADDRINUSE - Another socket is already listening on the same port.
|
||||
[IX] EBADF - The argument sockfd is not a valid descriptor.
|
||||
[I] ENOTSOCK - The argument sockfd is not a socket.
|
||||
[I] EOPNOTSUPP - The socket is not of a type that supports the listen() operation.
|
||||
*/
|
||||
void handleListen(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct listen_st *listen_rpc);
|
||||
|
||||
/*
|
||||
* Handles an RPC to create a socket (LWIP PCB and associated socketpair)
|
||||
*
|
||||
* A socketpair is created, one end is kept and wrapped into a PhySocket object
|
||||
* for use in the main ZT I/O loop, and one end is sent to the client. The client
|
||||
* is then required to tell the service what new file descriptor it has allocated
|
||||
* for this connection. After the mapping is complete, the socket can be used.
|
||||
*
|
||||
* @param PhySocket associated with this RPC connection
|
||||
* @param structure containing the data and parameters for this client's RPC
|
||||
*
|
||||
|
||||
i := should be implemented in intercept lib
|
||||
I := is implemented in intercept lib
|
||||
X := is implemented in service
|
||||
? := required treatment Unknown
|
||||
- := Not needed
|
||||
|
||||
[-] EACCES - Permission to create a socket of the specified type and/or protocol is denied.
|
||||
[I] EAFNOSUPPORT - The implementation does not support the specified address family.
|
||||
[I] EINVAL - Unknown protocol, or protocol family not available.
|
||||
[I] EINVAL - Invalid flags in type.
|
||||
[I] EMFILE - Process file table overflow.
|
||||
[?] ENFILE - The system limit on the total number of open files has been reached.
|
||||
[X] ENOBUFS or ENOMEM - Insufficient memory is available. The socket cannot be created until sufficient resources are freed.
|
||||
[?] EPROTONOSUPPORT - The protocol type or the specified protocol is not supported within this domain.
|
||||
*/
|
||||
Connection * handleSocket(PhySocket *sock, void **uptr, struct socket_st* socket_rpc);
|
||||
Connection * handleSocketProxy(PhySocket *sock, int socket_type);
|
||||
|
||||
/*
|
||||
* Handles an RPC to connect to a given address and port
|
||||
*
|
||||
* @param PhySocket associated with this RPC connection
|
||||
* @param structure containing the data and parameters for this client's RPC
|
||||
|
||||
--- Error handling in this method will only catch problems which are immedately
|
||||
apprent. Some errors will need to be caught in the nc_connected(0 callback
|
||||
|
||||
i := should be implemented in intercept lib
|
||||
I := is implemented in intercept lib
|
||||
X := is implemented in service
|
||||
? := required treatment Unknown
|
||||
- := Not needed
|
||||
|
||||
[-] EACCES - For UNIX domain sockets, which are identified by pathname: Write permission is denied ...
|
||||
[?] EACCES, EPERM - The user tried to connect to a broadcast address without having the socket broadcast flag enabled ...
|
||||
[X] EADDRINUSE - Local address is already in use.
|
||||
[I] EAFNOSUPPORT - The passed address didn't have the correct address family in its sa_family field.
|
||||
[X] EAGAIN - No more free local ports or insufficient entries in the routing cache.
|
||||
[ ] EALREADY - The socket is nonblocking and a previous connection attempt has not yet been completed.
|
||||
[IX] EBADF - The file descriptor is not a valid index in the descriptor table.
|
||||
[ ] ECONNREFUSED - No-one listening on the remote address.
|
||||
[i] EFAULT - The socket structure address is outside the user's address space.
|
||||
[ ] EINPROGRESS - The socket is nonblocking and the connection cannot be completed immediately.
|
||||
[-] EINTR - The system call was interrupted by a signal that was caught.
|
||||
[X] EISCONN - The socket is already connected.
|
||||
[X] ENETUNREACH - Network is unreachable.
|
||||
[I] ENOTSOCK - The file descriptor is not associated with a socket.
|
||||
[X] ETIMEDOUT - Timeout while attempting connection.
|
||||
|
||||
[X] EINVAL - Invalid argument, SVr4, generally makes sense to set this
|
||||
*/
|
||||
void handleConnect(PhySocket *sock, PhySocket *rpcsock, Connection *conn, struct connect_st* connect_rpc);
|
||||
int handleConnectProxy(PhySocket *sock, struct sockaddr_in *rawAddr);
|
||||
|
||||
// void handleIsConnected();
|
||||
|
||||
/*
|
||||
* Return the address that the socket is bound to
|
||||
*/
|
||||
void handleGetsockname(PhySocket *sock, PhySocket *rpcsock, void **uptr, struct getsockname_st *getsockname_rpc);
|
||||
|
||||
/*
|
||||
* Writes data from the application's socket to the LWIP connection
|
||||
*/
|
||||
void handleWrite(Connection *conn);
|
||||
|
||||
/*
|
||||
* Sends a return value to the intercepted application
|
||||
*/
|
||||
int sendReturnValue(PhySocket *sock, int retval, int _errno);
|
||||
int sendReturnValue(int fd, int retval, int _errno);
|
||||
|
||||
/*
|
||||
* Unpacks the buffer from an RPC command
|
||||
*/
|
||||
void unloadRPC(void *data, pid_t &pid, pid_t &tid,
|
||||
int &rpc_count, char (timestamp[RPC_TIMESTAMP_SZ]), char (magic[sizeof(uint64_t)]), char &cmd, void* &payload);
|
||||
|
||||
// Unused -- no UDP or TCP from this thread/Phy<>
|
||||
void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *local_address, const struct sockaddr *from,void *data,unsigned long len);
|
||||
void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success);
|
||||
void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN,const struct sockaddr *from);
|
||||
void phyOnTcpClose(PhySocket *sock,void **uptr);
|
||||
void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len);
|
||||
|
||||
void processReceivedData(PhySocket *sock,void **uptr,bool lwip_invoked);
|
||||
void phyOnTcpWritable(PhySocket *sock,void **uptr,bool lwip_invoked);
|
||||
|
||||
/*
|
||||
* Signals us to close the TcpConnection associated with this PhySocket
|
||||
*/
|
||||
void phyOnUnixClose(PhySocket *sock,void **uptr);
|
||||
|
||||
/*
|
||||
* Notifies us that there is data to be read from an application's socket
|
||||
*/
|
||||
void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len);
|
||||
|
||||
/*
|
||||
* Notifies us that we can write to an application's socket
|
||||
*/
|
||||
void phyOnUnixWritable(PhySocket *sock,void **uptr,bool lwip_invoked);
|
||||
|
||||
/*
|
||||
* Returns a pointer to a TcpConnection associated with a given PhySocket
|
||||
*/
|
||||
Connection *getConnection(PhySocket *sock);
|
||||
|
||||
/*
|
||||
* Closes a TcpConnection, associated LWIP PCB strcuture,
|
||||
* PhySocket, and underlying file descriptor
|
||||
*/
|
||||
void closeConnection(PhySocket *sock);
|
||||
|
||||
// --- Proxy stubs
|
||||
int proxyListenPort;
|
||||
|
||||
//std::map<int,PhySocket> proxySockStates;
|
||||
|
||||
int sockstate;
|
||||
int proxyListenSocket;
|
||||
PhySocket *proxyListenPhySocket;
|
||||
|
||||
void StartProxy(const char *nwid);
|
||||
|
||||
void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable);
|
||||
|
||||
// --- end Proxy stubs
|
||||
|
||||
ip_addr_t convert_ip(struct sockaddr_in * addr)
|
||||
{
|
||||
ip_addr_t conn_addr;
|
||||
struct sockaddr_in *ipv4 = addr;
|
||||
short a = ip4_addr1(&(ipv4->sin_addr));
|
||||
short b = ip4_addr2(&(ipv4->sin_addr));
|
||||
short c = ip4_addr3(&(ipv4->sin_addr));
|
||||
short d = ip4_addr4(&(ipv4->sin_addr));
|
||||
IP4_ADDR(&conn_addr, a,b,c,d);
|
||||
return conn_addr;
|
||||
}
|
||||
|
||||
Phy<NetconEthernetTap *> _phy;
|
||||
PhySocket *_unixListenSocket;
|
||||
|
||||
std::vector<Connection*> _Connections;
|
||||
|
||||
std::map<uint64_t, std::pair<PhySocket*, void*> > jobmap;
|
||||
|
||||
pid_t rpcCounter;
|
||||
netif interface;
|
||||
|
||||
MAC _mac;
|
||||
Thread _thread;
|
||||
std::string _homePath;
|
||||
std::string _dev; // path to Unix domain socket
|
||||
|
||||
std::vector<MulticastGroup> _multicastGroups;
|
||||
Mutex _multicastGroups_m;
|
||||
|
||||
std::vector<InetAddress> _ips;
|
||||
Mutex _ips_m, _tcpconns_m, _rx_buf_m, _close_m;
|
||||
|
||||
unsigned int _mtu;
|
||||
volatile bool _enabled;
|
||||
volatile bool _run;
|
||||
};
|
||||
|
||||
} // namespace ZeroTier
|
||||
|
||||
|
||||
Reference in New Issue
Block a user