#ifndef rpc_h
#define rpc_h
+#include "types.h"
#include <sys/socket.h>
#include <netinet/in.h>
-#include <list>
-#include <map>
-#include <stdio.h>
#include "thr_pool.h"
#include "marshall.h"
+#include "marshall_wrap.h"
#include "connection.h"
-#include "lock.h"
-using std::string;
-using std::map;
-using std::list;
+namespace rpc {
+ static constexpr milliseconds to_max{12000};
+ static constexpr milliseconds to_min{100};
+}
class rpc_const {
public:
// rpc client endpoint.
// manages a xid space per destination socket
// threaded: multiple threads can be sending RPCs,
-class rpcc : public chanmgr {
-
+class rpcc : private connection_delegate {
private:
- //manages per rpc info
+ // manages per rpc info
struct caller {
- caller(int xxid, unmarshall *un);
- ~caller();
+ caller(int _xid, string *_rep) : xid(_xid), rep(_rep) {}
int xid;
- unmarshall *un;
+ string *rep;
int intret;
- bool done;
+ bool done = false;
mutex m;
cond c;
};
- void get_refconn(connection **ch);
+ void get_refconn(shared_ptr<connection> & ch);
void update_xid_rep(int xid);
bool retrans_;
bool reachable_;
- connection *chan_;
+ shared_ptr<connection> chan_;
mutex m_; // protect insert/delete to calls[]
mutex chan_m_;
list<int> xid_rep_window_;
struct request {
- request() { clear(); }
void clear() { buf.clear(); xid = -1; }
bool isvalid() { return xid != -1; }
string buf;
- int xid;
+ int xid = -1;
};
- struct request dup_req_;
+ request dup_req_;
int xid_rep_done_;
+
+ int call1(proc_t proc, marshall &req, string &rep, milliseconds to);
+
+ template<class R>
+ int call_m(proc_t proc, marshall &req, R & r, milliseconds to) {
+ string rep;
+ int intret = call1(proc, req, rep, to);
+ unmarshall u(rep, true);
+ if (intret < 0) return intret;
+ u >> r;
+ if (u.okdone() != true) {
+ cerr << "rpcc::call_m: failed to unmarshall the reply. You are probably " <<
+ "calling RPC 0x" << hex << proc << " with the wrong return type." << endl;
+ VERIFY(0);
+ return rpc_const::unmarshal_reply_failure;
+ }
+ return intret;
+ }
+
+ bool got_pdu(const shared_ptr<connection> & c, const string & b);
+
public:
rpcc(const string & d, bool retrans=true);
~rpcc();
- struct TO {
- int to;
- };
- static const TO to_max;
- static const TO to_min;
- static TO to(int x) { TO t; t.to = x; return t;}
-
unsigned int id() { return clt_nonce_; }
- int bind(TO to = to_max);
+ int bind(milliseconds to = rpc::to_max);
void set_reachable(bool r) { reachable_ = r; }
void cancel();
- int islossy() { return lossytest_ > 0; }
-
- int call1(proc_t proc,
- marshall &req, unmarshall &rep, TO to);
-
- bool got_pdu(connection *c, char *b, size_t sz);
-
- template<class R>
- int call_m(proc_t proc, marshall &req, R & r, TO to);
-
template<class R, typename ...Args>
- inline int call(proc_t proc, R & r, const Args&... args);
+ inline int call(proc_t proc, R & r, const Args&... args) {
+ return call_timeout(proc, rpc::to_max, r, args...);
+ }
template<class R, typename ...Args>
- inline int call_timeout(proc_t proc, TO to, R & r, const Args&... args);
+ inline int call_timeout(proc_t proc, milliseconds to, R & r, const Args&... args) {
+ marshall m{args...};
+ return call_m(proc, m, r, to);
+ }
};
-template<class R> int
-rpcc::call_m(proc_t proc, marshall &req, R & r, TO to)
-{
- unmarshall u;
- int intret = call1(proc, req, u, to);
- if (intret < 0) return intret;
- u >> r;
- if (u.okdone() != true) {
- fprintf(stderr, "rpcc::call_m: failed to unmarshall the reply."
- "You are probably calling RPC 0x%x with wrong return "
- "type.\n", proc);
- VERIFY(0);
- return rpc_const::unmarshal_reply_failure;
- }
- return intret;
-}
-
-template<class R, typename... Args> inline int
-rpcc::call(proc_t proc, R & r, const Args&... args)
-{
- return call_timeout(proc, rpcc::to_max, r, args...);
-}
-
-template<class R, typename... Args> inline int
-rpcc::call_timeout(proc_t proc, const rpcc::TO to, R & r, const Args&... args)
-{
- marshall m{args...};
- return call_m(proc, m, r, to);
-}
-
-bool operator<(const sockaddr_in &a, const sockaddr_in &b);
-
// rpc server endpoint.
-class rpcs : public chanmgr {
-
- typedef enum {
- NEW, // new RPC, not a duplicate
- INPROGRESS, // duplicate of an RPC we're still processing
- DONE, // duplicate of an RPC we already replied to (have reply)
- FORGOTTEN, // duplicate of an old RPC whose reply we've forgotten
- } rpcstate_t;
-
+class rpcs : private connection_delegate {
private:
+ typedef enum {
+ NEW, // new RPC, not a duplicate
+ INPROGRESS, // duplicate of an RPC we're still processing
+ DONE, // duplicate of an RPC we already replied to (have reply)
+ FORGOTTEN, // duplicate of an old RPC whose reply we've forgotten
+ } rpcstate_t;
+
// state about an in-progress or completed RPC, for at-most-once.
// if cb_present is true, then the RPC is complete and a reply
// has been sent; in that case buf points to a copy of the reply,
// and sz holds the size of the reply.
- struct reply_t {
- reply_t (int _xid) {
- xid = _xid;
- cb_present = false;
- buf = NULL;
- sz = 0;
- }
- reply_t (int _xid, char *_buf, size_t _sz) {
- xid = _xid;
- cb_present = true;
- buf = _buf;
- sz = _sz;
- }
- int xid;
- bool cb_present; // whether the reply buffer is valid
- char *buf; // the reply buffer
- size_t sz; // the size of reply buffer
- };
+ struct reply_t {
+ reply_t (int _xid) : xid(_xid), cb_present(false) {}
+ reply_t (int _xid, const string & _buf) : xid(_xid), cb_present(true), buf(_buf) {}
+ int xid;
+ bool cb_present; // whether the reply buffer is valid
+ string buf; // the reply buffer
+ };
- unsigned int port_;
- unsigned int nonce_;
+ in_port_t port_;
+ unsigned int nonce_;
- // provide at most once semantics by maintaining a window of replies
- // per client that that client hasn't acknowledged receiving yet.
+ // provide at most once semantics by maintaining a window of replies
+ // per client that that client hasn't acknowledged receiving yet.
// indexed by client nonce.
- map<unsigned int, list<reply_t> > reply_window_;
+ map<unsigned int, list<reply_t>> reply_window_;
- void free_reply_window(void);
- void add_reply(unsigned int clt_nonce, int xid, char *b, size_t sz);
+ void free_reply_window(void);
+ void add_reply(unsigned int clt_nonce, int xid, const string & b);
- rpcstate_t checkduplicate_and_update(unsigned int clt_nonce,
- int xid, int rep_xid,
- char **b, size_t *sz);
+ rpcstate_t checkduplicate_and_update(unsigned int clt_nonce,
+ int xid, int rep_xid, string & b);
- void updatestat(proc_t proc);
+ void updatestat(proc_t proc);
- // latest connection to the client
- map<unsigned int, connection *> conns_;
+ // latest connection to the client
+ map<unsigned int, shared_ptr<connection>> conns_;
- // counting
- const size_t counting_;
- size_t curr_counts_;
- map<proc_t, size_t> counts_;
+ // counting
+ const size_t counting_;
+ size_t curr_counts_;
+ map<proc_t, size_t> counts_;
- int lossytest_;
- bool reachable_;
+ bool reachable_;
- // map proc # to function
- map<proc_t, handler *> procs_;
+ // map proc # to function
+ map<proc_t, handler *> procs_;
- mutex procs_m_; // protect insert/delete to procs[]
- mutex count_m_; //protect modification of counts
- mutex reply_window_m_; // protect reply window et al
- mutex conss_m_; // protect conns_
+ mutex procs_m_; // protect insert/delete to procs[]
+ mutex count_m_; // protect modification of counts
+ mutex reply_window_m_; // protect reply window et al
+ mutex conns_m_; // protect conns_
+ void dispatch(shared_ptr<connection> c, const string & buf);
- protected:
+ // internal handler registration
+ void reg1(proc_t proc, handler *);
- struct djob_t {
- djob_t (connection *c, char *b, size_t bsz):buf(b),sz(bsz),conn(c) {}
- char *buf;
- size_t sz;
- connection *conn;
- };
- void dispatch(djob_t *);
+ unique_ptr<thread_pool> dispatchpool_;
+ unique_ptr<tcpsconn> listener_;
- // internal handler registration
- void reg1(proc_t proc, handler *);
+ // RPC handler for clients binding
+ int rpcbind(unsigned int &r, int a);
- ThrPool* dispatchpool_;
- tcpsconn* listener_;
+ bool got_pdu(const shared_ptr<connection> & c, const string & b);
public:
- rpcs(unsigned int port, size_t counts=0);
- ~rpcs();
- inline unsigned int port() { return listener_->port(); }
- //RPC handler for clients binding
- int rpcbind(unsigned int &r, int a);
- void set_reachable(bool r) { reachable_ = r; }
+ rpcs(in_port_t port, size_t counts=0);
+ ~rpcs();
- bool got_pdu(connection *c, char *b, size_t sz);
+ void set_reachable(bool r) { reachable_ = r; }
- template<class F, class C=void> void reg(proc_t proc, F f, C *c=nullptr);
-};
+ template<class F, class C=void> void reg(proc_t proc, F f, C *c=nullptr) {
+ struct ReturnOnFailure {
+ static inline int unmarshall_args_failure() {
+ return rpc_const::unmarshal_args_failure;
+ }
+ };
+ reg1(proc, marshalled_func<F, ReturnOnFailure>::wrap(f, c));
+ }
-struct ReturnOnFailure {
- static inline int unmarshall_args_failure() {
- return rpc_const::unmarshal_args_failure;
- }
+ void start();
};
-template<class F, class C> void rpcs::reg(proc_t proc, F f, C *c) {
- reg1(proc, marshalled_func<F, ReturnOnFailure>::wrap(f, c));
-}
-
-sockaddr_in make_sockaddr(const string &hostandport);
-sockaddr_in make_sockaddr(const string &host, const string &port);
-
#endif
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