Reliable Multicast Protocol VC implementation in windows...

Reliable multicasting is said in many places on the Internet and in the book. After reading it, I understand it, but it is very vague...

I also checked Windows Network Programming and finally realized it ..

Some server code:

// Dlgreliablemulticast. CPP: implementation file // # include "stdafx. H "# include" testserver. H "# include" dlgreliablemulticast. H "// zookeeper (histogram, cdialog) cdlgreliablemulticast: cdlgreliablemulticast (cwnd * pparent/* = NULL */): cdialog (cdlgreliablemulticast: IDD, pparent) {m_hworkthread = NULL;} cdlgreliablemulticast ::~ Upload () {} void upload: dodataexchange (cdataexchange * PDX) {cdialog: dodataexchange (PDX);} begin_message_map (cdlgreliablemulticast, cdialog) end_message_map () // receive message handlersbool cdlgreliablemulticast: oninitdialog () {cdialog: oninitdialog (); initnetwork (); Return true;} void cdlgreliablemulticast: initnetwork () {// create threaddword dwthreadid = 0; m_hworkthread = createthread (null, 0, networkthreadproc, this, create_suincluded, & dwthreadid); If (null = m_hworkthread) {return ;} setthreadpriority (m_hworkthread, thread_priority_highest); resumethread (m_hworkthread);} DWORD winapi restart: networkthreadproc (lpvoid lpvparam) {limit * pthis = (Limit *) lpvparam; return pthis-> threadproc ();} DWORD cdlgreliablemulticast: threadproc () {m_dwlocalipaddr = ...; // native ipwsadata wsadata; wsastartup (makeword (2, 2), & wsadata); m_hsocket = socket (af_inet, sock_rdm, ipproto_rm); If (m_hsocket = invalid_socket) {int nerr = wsagetlasterror (); logprintf (_ T ("socket: errorcode: % d \ n"), nerr);} // bind to inaddr_anysockaddr_in localaddr; memset (& localaddr, 0, sizeof (localaddr); localaddr. sin_family = af_inet; localaddr. sin_addr.s_un.s_addr = htonl (inaddr_any); localaddr. sin_port = htons (0); int nret = BIND (m_hsocket, (sockaddr *) & localaddr, sizeof (localaddr); If (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("BIND: errorcode: % d \ n"), nerr);} // set the outbound interface ulong ulsend = m_dwlocalipaddr; nret = setsockopt (m_hsocket, ipproto_rm, rm_set_send_if, (char *) & ulsend, sizeof (ulsend); If (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("setsockopt: errorcode: % d \ n"), nerr);} // connect the socket to connect the multicast group address sockaddr_in addrmulti; memset (& addrmulti, 0, sizeof (addrmulti); addrmulti. sin_family = af_inet; addrmulti. sin_addr.s_un.s_addr = inet_addr ("234.5.6.7"); addrmulti. sin_port = htons (5150); nret = connect (m_hsocket, (sockaddr *) & addrmulti, sizeof (addrmulti); If (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("setsockopt: errorcode: % d \ n"), nerr);} Char Buf [1024] = {0 }; buf [0] = 'a'; Buf [1] = 'V'; Buf [2] = 'D'; Buf [3] = 'R'; while (1) {nret = Send (m_hsocket, Buf, sizeof (BUF), 0); If (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("Send: errorcode: % d \ n "), nerr) ;}} wsacleanup (); Return 0 ;}

Client:

// Dlgreliablemulticast. CPP: implementation file // # include "stdafx. H "# include" testclient. H "# include" dlgreliablemulticast. H "// zookeeper (histogram, cdialog) cdlgreliablemulticast: cdlgreliablemulticast (cwnd * pparent/* = NULL */): cdialog (cdlgreliablemulticast: IDD, pparent) {m_hworkthread = NULL;} cdlgreliablemulticast ::~ Upload () {} void upload: dodataexchange (cdataexchange * PDX) {cdialog: dodataexchange (PDX);} begin_message_map (cdlgreliablemulticast, cdialog) end_message_map () // receive message handlersbool cdlgreliablemulticast: oninitdialog () {cdialog: oninitdialog (); initnetwork (); Return true;} void cdlgreliablemulticast: initnetwork () {// create threaddword dwthreadid = 0; m_hworkthread = createthread (null, 0, networkthreadproc, this, create_suincluded, & dwthreadid); If (null = m_hworkthread) {return ;} setthreadpriority (m_hworkthread, thread_priority_highest); resumethread (m_hworkthread);} DWORD winapi restart: networkthreadproc (lpvoid lpvparam) {limit * pthis = (Limit *) lpvparam; return pthis-> threadproc ();} DWORD cdlgreliablemulticast: threadproc () {m_dwlocalipaddr = ...; // native ipwsadata wsadata; wsastartup (makeword (2, 2), & wsadata); m_hsocket = socket (af_inet, sock_rdm, ipproto_rm); If (m_hsocket = invalid_socket) {int nerr = wsagetlasterror (); logprintf (_ T ("socket: errorcode: % d \ n"), nerr);} sockaddr_in addrmulti; memset (& addrmulti, 0, sizeof (addrmulti); addrmulti. sin_family = af_inet; addrmulti. sin_addr.s_un.s_addr = inet_addr ("234.5.6.7"); addrmulti. sin_port = htons (5150); int nret = BIND (m_hsocket, (sockaddr *) & addrmulti, sizeof (addrmulti); If (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("BIND: errorcode: % d \ n"), nerr);} nret = listen (m_hsocket, 10 ); if (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("Listen: errorcode: % d \ n"), nerr );} ulong localipaddress = m_dwlocalipaddr; nret = setsockopt (m_hsocket, ipproto_rm, rm_add_receive_if, (char *) & localipaddress, sizeof (localipaddress); If (nret = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("Listen: errorcode: % d \ n"), nerr);} sockaddr_in addrfrom; int fromlen = sizeof (addrfrom ); socket NS = accept (m_hsocket, (sockaddr *) & addrfrom, & fromlen); If (NS = invalid_socket) {int nerr = wsagetlasterror (); logprintf (_ T ("accept: errorcode: % d \ n"), nerr);} closesocket (m_hsocket); // while (1) {char Buf [1024]; int rc = Recv (NS, Buf, sizeof (BUF), 0); If (rc = socket_error) {int nerr = wsagetlasterror (); logprintf (_ T ("Recv: errorcode: % d \ n "), nerr);} else {//} closesocket (NS); wsacleanup (); Return 0 ;}

At the same time, you must install the reliable multicast protocol on the local machine as follows: