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communication.cpp File Reference

Things related to network communication. More...

#include "xdprof.h"

Include dependency graph for communication.cpp:

Go to the source code of this file.

Functions
int	Send (const char *msg, int len)
	Sends the msg of length len over the socket. More...
void	Send (const string &s)
	Sends a string. More...
bool	IsConnected ()
	Determines if the client is connected to the server. More...
int	GetSocketDescriptor (const char *hostname, unsigned short port)
	Return a socket descriptor connect()ed to a hostname that is accept()ing information data on port. More...
bool	InitializeCommunications (string hostname, int port)
	This initializes communications with the server. More...
void	RecordPacket (unsigned long packetsize)
void	ShutdownCommunications ()
	Shutdown the communications, close the sockets, etc. More...
Variables
int	Server
	Socket connection (or < 0 if not connected). More...
int	BytesSent = 0
	Number of bytes sent. More...
int	SendCalls = 0
	Number of times Send was called. More...
int	PacketCount = 0
unsigned long int	PacketBytes = 0

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Detailed Description

Things related to network communication.

Definition in file communication.cpp.

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Function Documentation

int GetSocketDescriptor ( const char * hostname, unsigned short port ) [static]

Return a socket descriptor connect()ed to a hostname that is accept()ing information data on port. Return a value <= 0 if such a connection can't be made. Parameters: hostname   the hostname to connect to port   the port number Definition at line 91 of file communication.cpp. Referenced by InitializeCommunications(). { struct hostent *hentry; struct sockaddr_in s; int fd; if (port <= 0 || port > 65535) { fprintf(stderr, "DPROF ERROR: bad port number\n"); return -1; } if (hostname == NULL) { fprintf(stderr, "DPROF ERROR: hostname is NULL\n"); return -1; } /* create a socket */ fd = socket(AF_INET, SOCK_STREAM, 0); /* find remote host's addr from name */ if ((hentry = gethostbyname(hostname)) == NULL) { #ifdef WIN32 debug("Bad gethostbyname value.", WSAGetLastError()); #endif return -1; } memset((char *)&s, 0, sizeof(s)); /* set remote host's addr; its already in network byte order */ memcpy(&s.sin_addr.s_addr, *(hentry->h_addr_list), sizeof(s.sin_addr.s_addr)); /* set remote host's port */ s.sin_port = htons(port); s.sin_family = AF_INET; /* now try connecting */ if (-1 == connect(fd, (struct sockaddr*)&s, sizeof(s))) { debug("Unable to connect!"); return -1; } else { return fd; } }

bool InitializeCommunications ( string hostname, int port )

This initializes communications with the server. Parameters: hostname   the hostname to connect to; either IP address or a machine name port   the port number to use selfinfo   a descriptive string describing this connection Definition at line 148 of file communication.cpp. { #ifdef WIN32 WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 1, 1 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { debug("WSA error", WSAGetLastError()); Server = -1; return false; } #endif Server = GetSocketDescriptor(hostname.c_str(), static_cast<unsigned short>(port)); if (IsConnected()) debug("connected!"); else debug("couldn't connect"); return IsConnected(); }

bool IsConnected ( )

Determines if the client is connected to the server. Definition at line 79 of file communication.cpp. Referenced by BackgroundThread(), and InitializeCommunications(). { return (Server > 0); }

void RecordPacket ( unsigned long packetsize )

Definition at line 176 of file communication.cpp. { ++PacketCount; PacketBytes += packetsize; }

void Send ( const string & s )

Sends a string. Parameters: s   the string to send Definition at line 71 of file communication.cpp. { Send(s.c_str(), s.length() ); }

int Send ( const char * msg, int len )

Sends the msg of length len over the socket. Parameters: msg   the data to send len   the length of the data Definition at line 55 of file communication.cpp. { if (Server > 0) { BytesSent += len; ++SendCalls; return send(Server, msg, len, 0); } else return 0; }

void ShutdownCommunications ( )

Shutdown the communications, close the sockets, etc. Definition at line 185 of file communication.cpp. Referenced by BackgroundThread(), and NotifyEvent(). { Send("/*done*/"); unsafe_debug("Bytes sent:", BytesSent); unsafe_debug("SendCalls: ", SendCalls); //fprintf(stderr, "bytes=%d calls=%d\n", BytesSent, SendCalls); fprintf(stdout, "\npackets\tbytes\trefresh\n"); //fprintf(stderr, "packets\t%d \nbytes\t%d\nrefresh\t%d\n", PacketCount, PacketBytes,RefreshTime); fprintf(stdout, "%d\t%d\t%d\n", PacketCount, PacketBytes,RefreshTime); fprintf(stdout, "Methods=%d, Classes=%d, MethodCache=%d,ClassCache=%d\n", Methods.size(), Classes.size(), MethodCache.size(), ClassCache.size()); fflush(stdout); unsafe_debug("Average: ", BytesSent / static_cast<double>(SendCalls)); if (Server > 0) closesocket(Server); Server = -1; #ifdef WIN32 WSACleanup(); #endif }

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Variable Documentation

int BytesSent = 0 [static]

Number of bytes sent. Definition at line 45 of file communication.cpp.

unsigned long int PacketBytes = 0 [static]

Definition at line 174 of file communication.cpp.

int PacketCount = 0 [static]

Definition at line 173 of file communication.cpp.

int SendCalls = 0 [static]

Number of times Send was called. Definition at line 48 of file communication.cpp.

int Server [static]

Socket connection (or < 0 if not connected). Definition at line 42 of file communication.cpp.

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