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slsDetectorPackage/slsDetectorSoftware/MySocketTCP/genericSocket.h
l_maliakal_d ac2c4211e2 included settting up of udpport from client and getting receiver mac from receiver and also listening to only one ethernet interface 
git-svn-id: file:///afs/psi.ch/project/sls_det_software/svn/slsDetectorSoftware@371 951219d9-93cf-4727-9268-0efd64621fa3
2012-12-06 14:27:52 +00:00

634 lines
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#ifndef GENERIC_SOCKET_H
#define GENERIC_SOCKET_H
/**
*
* @libdoc genericSocket provides some functions to open/close sockets both TCP and UDP
*
* @short some functions to open/close sockets both TCP and UDP
* @author Anna Bergamaschi
* @version 0.0
*/
//version 1.0, base development, Ian 19/01/09
/* Modified by anna on 19.01.2009 */
/*
canceled SetupParameters() and varaibles intialized in the constructors' headers;
defined SEND_REC_MAX_SIZE (for compatibilty with mythen (and possibly other) pure C servers (i would move it to the common header file)
added #ifndef C_ONLY... to cutout class definition when including in pure C servers (can be removed if SEND_REC_MAX_SIZE is moved to the common header file)
defined private variables char hostname[1000] and int portno to store connection informations;
defined public functions int getHostname(char *name) and int getPortNumber() to retrieve connection informations
added public function int getErrorStatus() returning 1 if socketDescriptor<0
remove exits in the constructors and replace them with socketDescriptor=-1
replaced the argument of send/receive data with void (to avoid too much casting or compiler errors/warnings)
added a function which really does not close the socket between send/receive (senddataonly, receivedataonly)
*/
#ifdef __CINT__
//class sockaddr_in;
class socklen_t;
class uint32_t;
class uint32_t_ss;
// CINT view of types:
class sockaddr_in;
// {
// unsigned short int sa_family;
// unsigned char sa_data[14];
// };
#else
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <ifaddrs.h>
#endif
#include <unistd.h>
#include <string.h>
#include <iostream>
#include <math.h>
#include <errno.h>
#include <stdio.h>
using namespace std;
#define DEFAULT_PACKET_SIZE 1286
#define DEFAULT_PORTNO 1952
#define DEFAULT_BACKLOG 5
#define DEFAULT_UDP_PORTNO 50001
class genericSocket{
public:
/**
Communication protocol
*/
enum communicationProtocol{
TCP, /**< TCP/IP */
UDP /**< UDP */
};
genericSocket(const char* const host_ip_or_name, unsigned short int const port_number, communicationProtocol p) :
// portno(port_number),
protocol(p), is_a_server(0), socketDescriptor(-1),file_des(-1), packet_size(DEFAULT_PACKET_SIZE)// sender (client): where to? ip
{
// strcpy(hostname,host_ip_or_name);
struct hostent *hostInfo = gethostbyname(host_ip_or_name);
if (hostInfo == NULL){
cerr << "Exiting: Problem interpreting host: " << host_ip_or_name << "\n";
} else {
// Set some fields in the serverAddress structure.
serverAddress.sin_family = hostInfo->h_addrtype;
memcpy((char *) &serverAddress.sin_addr.s_addr,
hostInfo->h_addr_list[0], hostInfo->h_length);
serverAddress.sin_port = htons(port_number);
socketDescriptor=0; //You can use send and recv, //would it work?????
}
clientAddress_length=sizeof(clientAddress);
}
int getProtocol(communicationProtocol p) {
switch (p) {
case TCP:
return SOCK_STREAM;
break;
case UDP:
return SOCK_DGRAM;
default:
cerr << "unknow protocol " << p << endl;
return -1;
}
}
int getProtocol() {return getProtocol(protocol);};
/**
The constructor for a server
@short the contructor for a server
\param port_number port number to listen to
\param p TCP or UDP
\param eth interface name or IP address to listen to (if NULL, listen to all interfaces)
*/
genericSocket(unsigned short int const port_number, communicationProtocol p, const char *eth=NULL):
//portno(port_number),
protocol(p), is_a_server(1),socketDescriptor(-1), file_des(-1), packet_size(DEFAULT_PACKET_SIZE){
/* // you can specify an IP address: */
/* */
/* // or you can let it automatically select one: */
/* myaddr.sin_addr.s_addr = INADDR_ANY; */
if(serverAddress.sin_port == htons(port_number)){
socketDescriptor = -10;
return;
}
char ip[20];
strcpy(ip,"0.0.0.0");
clientAddress_length=sizeof(clientAddress);
if (eth) {
strcpy(ip,nameToIp(string(eth)).c_str());
if (string(ip)==string("0.0.0.0"))
strcpy(ip,eth);
}
// strcpy(hostname,"localhost"); //needed?!?!?!?
socketDescriptor = socket(AF_INET, getProtocol(),0); //tcp
if (socketDescriptor < 0) {
cerr << "Can not create socket "<<endl;
return;
}
// Set some fields in the serverAddress structure.
serverAddress.sin_family = AF_INET;
serverAddress.sin_port = htons(port_number);
serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
if (string(ip)!=string("0.0.0.0")) {
if (inet_pton(AF_INET, ip, &(serverAddress.sin_addr)))
;
else
serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
}
if(bind(socketDescriptor,(struct sockaddr *) &serverAddress,sizeof(serverAddress))<0){
cerr << "Can not bind socket "<< endl;
socketDescriptor=-1;
return;
}
if (getProtocol()==SOCK_STREAM)
listen(socketDescriptor, DEFAULT_BACKLOG);
}
/**
The destructor: disconnects and close the socket
@short the destructor
*/
~genericSocket(){ \
Disconnect();
if (socketDescriptor >= 0){ \
close(socketDescriptor); \
} \
file_des=-1; \
};
/* /\** @short if client returns hostname for connection */
/* \param name string to write the hostname to */
/* \returns 0 if client, 1 if server (in this case ignore name return value) */
/* *\/ */
/* int getHostname(char *name){ */
/* if (is_a_server==0) { */
/* strcpy(name,getHostname().c_str()); */
/* } */
/* return is_a_server; */
/* }; */
/* /\** @short if client returns hostname for connection */
/* \returns hostname */
/* *\/ */
/* string getHostname(){return string(hostname);}; */
/* /\** @short returns port number for connection */
/* \returns port number */
/* *\/ */
/* int getPortNumber(){return portno;}; */
/** @short returns communication protocol
\returns TCP or UDP
*/
int getCommunicationProtocol(){return protocol;};
/** @short returns error status
\returns 1 if error
*/
int getErrorStatus(){if (socketDescriptor==-10) return -10; else if (socketDescriptor<0) return 1; else return 0;};
/** @short etablishes connection; disconnect should always follow
\returns 1 if error
*/
int Connect(){//cout<<"connect"<<endl;
if(file_des>0) return file_des;
if (protocol==UDP) return -1;
if(is_a_server && protocol==TCP){ //server tcp; the server will wait for the clients connection
if (socketDescriptor>0) {
if ((file_des = accept(socketDescriptor,(struct sockaddr *) &clientAddress, &clientAddress_length)) < 0) {
cerr << "Error: with server accept, connection refused"<<endl;
switch(errno) {
case EWOULDBLOCK:
printf("ewouldblock eagain\n");
break;
case EBADF:
printf("ebadf\n");
break;
case ECONNABORTED:
printf("econnaborted\n");
break;
case EFAULT:
printf("efault\n");
break;
case EINTR:
printf("eintr\n");
break;
case EINVAL:
printf("einval\n");
break;
case EMFILE:
printf("emfile\n");
break;
case ENFILE:
printf("enfile\n");
break;
case ENOTSOCK:
printf("enotsock\n");
break;
case EOPNOTSUPP:
printf("eOPNOTSUPP\n");
break;
case ENOBUFS:
printf("ENOBUFS\n");
break;
case ENOMEM:
printf("ENOMEM\n");
break;
case ENOSR:
printf("ENOSR\n");
break;
case EPROTO:
printf("EPROTO\n");
break;
default:
printf("unknown error\n");
}
socketDescriptor=-1;
}
else{
inet_ntop(AF_INET, &(clientAddress.sin_addr), dummyClientIP, INET_ADDRSTRLEN);
#ifdef VERY_VERBOSE
cout << "client connected "<< file_des << endl;
#endif
}
}
// file_des = socketDescriptor;
#ifdef VERY_VERBOSE
cout << "fd " << file_des << endl;
#endif
} else {
if (socketDescriptor<=0)
socketDescriptor = socket(AF_INET, getProtocol(),0);
// SetTimeOut(10);
if (socketDescriptor < 0){
cerr << "Can not create socket "<<endl;
file_des = socketDescriptor;
} else {
if(connect(socketDescriptor,(struct sockaddr *) &serverAddress,sizeof(serverAddress))<0){
cerr << "Can not connect to socket "<<endl;
file_des = -1;
} else{
file_des = socketDescriptor;
}
}
}
return file_des;
}
uint16_t getPortNumber(){
return ntohs(serverAddress.sin_port);
}
int getFileDes(){return file_des;};
int getsocketDescriptor(){return socketDescriptor;};
/** @short free connection */
void Disconnect(){
if (protocol==UDP){
close(socketDescriptor);
socketDescriptor=-1;
}
else{
if(file_des>=0){ //then was open
if(is_a_server){
close(file_des);
}
else {
close(socketDescriptor);
socketDescriptor=-1;
}
file_des=-1;
}
}
};
void ShutDownSocket(){
if (socketDescriptor != -1)
shutdown(socketDescriptor, SHUT_RDWR);
};
/** Set the socket timeout ts is in seconds */
int SetTimeOut(int ts){
if (ts<=0)
return -1;
//cout << "socketdescriptor "<< socketDescriptor << endl;
struct timeval tout;
tout.tv_sec = 0;
tout.tv_usec = 0;
if(::setsockopt(socketDescriptor, SOL_SOCKET, SO_RCVTIMEO, &tout, sizeof(struct timeval)) <0)
{
cerr << "Error in setsockopt SO_RCVTIMEO "<< 0 << endl;
}
tout.tv_sec = ts;
tout.tv_usec = 0;
if(::setsockopt(socketDescriptor, SOL_SOCKET, SO_SNDTIMEO, &tout, sizeof(struct timeval)) < 0)
{
cerr << "Error in setsockopt SO_SNDTIMEO " << ts << endl;
}
return 0;
};
int setPacketSize(int i=-1) { if (i>=0) packet_size=i; return packet_size;};
static string ipToName(string ip) {
struct ifaddrs *addrs, *iap;
struct sockaddr_in *sa;
char buf[32];
strcpy(buf,"none");
getifaddrs(&addrs);
for (iap = addrs; iap != NULL; iap = iap->ifa_next) {
if (iap->ifa_addr && (iap->ifa_flags & IFF_UP) && iap->ifa_addr->sa_family == AF_INET) {
sa = (struct sockaddr_in *)(iap->ifa_addr);
inet_ntop(iap->ifa_addr->sa_family, (void *)&(sa->sin_addr), buf, sizeof(buf));
if (ip==string(buf)) {
//printf("%s\n", iap->ifa_name);
strcpy(buf,iap->ifa_name);
}
}
}
freeifaddrs(addrs);
return string(buf);
};
static string nameToMac(string inf) {
struct ifreq ifr;
int sock, j, k;
char mac[32];
sock=getSock(inf,&ifr);
if (-1==ioctl(sock, SIOCGIFHWADDR, &ifr)) {
perror("ioctl(SIOCGIFHWADDR) ");
return string("00:00:00:00:00:00");
}
for (j=0, k=0; j<6; j++) {
k+=snprintf(mac+k, sizeof(mac)-k-1, j ? ":%02X" : "%02X",
(int)(unsigned int)(unsigned char)ifr.ifr_hwaddr.sa_data[j]);
}
mac[sizeof(mac)-1]='\0';
return string(mac);
};
static string nameToIp(string inf){
struct ifreq ifr;
int sock;
char *p, addr[32];
sock=getSock(inf,&ifr);
if (-1==ioctl(sock, SIOCGIFADDR, &ifr)) {
perror("ioctl(SIOCGIFADDR) ");
return string("0.0.0.0");
}
p=inet_ntoa(((struct sockaddr_in *)(&ifr.ifr_addr))->sin_addr);
strncpy(addr,p,sizeof(addr)-1);
addr[sizeof(addr)-1]='\0';
return string(addr);
};
static int getSock(string inf, struct ifreq *ifr) {
int sock;
sock=socket(PF_INET, SOCK_STREAM, 0);
if (-1==sock) {
perror("socket() ");
return 1;
}
strncpy(ifr->ifr_name,inf.c_str(),sizeof(ifr->ifr_name)-1);
ifr->ifr_name[sizeof(ifr->ifr_name)-1]='\0';
return sock;
};
int ReceiveDataOnly(void* buf,int length){
if (buf==NULL) return -1;
total_sent=0;
switch(protocol) {
case TCP:
if (file_des<0) return -1;
while(length>0){
nsending = (length>packet_size) ? packet_size:length;
nsent = read(file_des,(char*)buf+total_sent,nsending);
if(!nsent) break;
length-=nsent;
total_sent+=nsent;
}
break;
case UDP:
if (socketDescriptor<0) return -1;
// while(length>0){
for(int i=0;i<2;i++){
nsending=packet_size;
//nsending = (length>packet_size) ? packet_size:length;
nsent = recvfrom(socketDescriptor,(char*)buf+total_sent,nsending, 0, (struct sockaddr *) &clientAddress, &clientAddress_length);
if(!nsent) break;
length-=nsent;
total_sent+=nsent;
}
break;
default:
;
}
#ifdef VERY_VERBOSE
cout << "sent "<< total_sent << " Bytes" << endl;
#endif
if (total_sent>0)
strcpy(thisClientIP,dummyClientIP);
if (strcmp(lastClientIP,thisClientIP))
differentClients=1;
else
differentClients=0;
return total_sent;
}
int SendDataOnly(void *buf, int length) {
#ifdef VERY_VERBOSE
cout << "want to send "<< length << " Bytes" << endl;
#endif
if (buf==NULL) return -1;
total_sent=0;
switch(protocol) {
case TCP:
if (file_des<0) return -1;
while(length>0){
nsending = (length>packet_size) ? packet_size:length;
nsent = write(file_des,(char*)buf+total_sent,nsending);
if(!nsent) break;
length-=nsent;
total_sent+=nsent;
}
break;
case UDP:
if (socketDescriptor<0) return -1;
while(length>0){
nsending = (length>packet_size) ? packet_size:length;
nsent = sendto(socketDescriptor,(char*)buf+total_sent,nsending, 0, (struct sockaddr *) &clientAddress, clientAddress_length);
if(!nsent) break;
length-=nsent;
total_sent+=nsent;
}
break;
default:
;
}
#ifdef VERY_VERBOSE
cout << "sent "<< total_sent << " Bytes" << endl;
#endif
return total_sent;
}
char lastClientIP[INET_ADDRSTRLEN];
char thisClientIP[INET_ADDRSTRLEN];
int differentClients;
protected:
communicationProtocol protocol;
int is_a_server;
int socketDescriptor;
int file_des;
int packet_size;
struct sockaddr_in clientAddress, serverAddress;
socklen_t clientAddress_length;
char dummyClientIP[INET_ADDRSTRLEN];
private:
int nsending;
int nsent;
int total_sent;
// pthread_mutex_t mp;
};
#endif
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