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socketConnection.h
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socketConnection.h
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#ifndef INCLUDED_SOCKET_H
#define INCLUDED_SOCKET_H
#include <iostream>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define SO_RCVBUF_SIZE 10485760
#define RECVBUFLEN 1500
using namespace std;
class socketUtility {
public:
//////////////////////////////////
int media_Sockfd;
int fecRow_Sockfd;
int fecCol_Sockfd;
int output_Sockfd;
int fdmax;
unsigned char *sockRecvBuf;
//////////////////////////////////
socketUtility(const char* mediaIP , const char* mediaPort, const char* outputIP , const char* outputPort) {
char *fecRowPort = (char*)malloc(20);
char *fecColPort = (char*)malloc(20);
sprintf(fecRowPort , "%d" , atoi(mediaPort) + 4);
sprintf(fecColPort , "%d" , atoi(mediaPort) + 2);
media_Sockfd = listenSocket(mediaIP , mediaPort , SO_RCVBUF_SIZE);
fecRow_Sockfd = listenSocket(mediaIP , fecRowPort , SO_RCVBUF_SIZE);
fecCol_Sockfd = listenSocket(mediaIP , fecColPort , SO_RCVBUF_SIZE);
output_Sockfd = sendSocket(outputIP , outputPort);
fdmax = maximumOfThreeNum(media_Sockfd , fecRow_Sockfd , fecCol_Sockfd);
sockRecvBuf = (unsigned char*)malloc(RECVBUFLEN * sizeof(unsigned char));
}
~socketUtility() {
if(media_Sockfd >= 0)
close(media_Sockfd);
if(fecRow_Sockfd >= 0)
close(fecRow_Sockfd);
if(fecCol_Sockfd >= 0)
close(fecCol_Sockfd);
if(output_Sockfd >= 0)
close(output_Sockfd);
if(sockRecvBuf)
free(sockRecvBuf);
exit(1);
}
bool isMulticastAddress(const char* mediaIP) {
string IPstr(mediaIP);
string firstByteStr = IPstr.substr(0 , 3);
if(stoi(firstByteStr) >= 224 && stoi(firstByteStr) <= 239) {
return true;
}
else {
return false;
}
}
int listenSocket(const char* mediaIP , const char* mediaPort , int recvBufSize) {
int sockfd;
struct addrinfo hints = { 0 };
struct addrinfo* localAddr = 0;
struct addrinfo* mediaAddr = 0;
int yes = 1;
hints.ai_family = AF_INET;
hints.ai_flags = AI_NUMERICHOST;
int addrInfoStatus;
if((addrInfoStatus = getaddrinfo(mediaIP , NULL , &hints , &mediaAddr)) != 0) {
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(addrInfoStatus));
return -1;
}
hints.ai_family = mediaAddr->ai_family;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE;
if((addrInfoStatus = getaddrinfo(NULL , mediaPort , &hints , &localAddr)) != 0) {
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(addrInfoStatus));
return -1;
}
if((sockfd = socket(localAddr->ai_family , localAddr->ai_socktype , 0)) < 0) {
perror("socket() failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
if(setsockopt(sockfd , SOL_SOCKET , SO_REUSEADDR , (char*)&yes , sizeof(int)) == -1) {
perror("setsockopt() failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
if(bind(sockfd , localAddr->ai_addr , localAddr->ai_addrlen) != 0) {
perror("bind() failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
int outputValue = 0;
socklen_t outputValue_len = sizeof(outputValue);
int defaultBuf;
if(getsockopt(sockfd , SOL_SOCKET , SO_RCVBUF , (char*)&outputValue , &outputValue_len) != 0) {
perror("getsockopt failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
defaultBuf = outputValue;
outputValue = recvBufSize;
if(setsockopt(sockfd , SOL_SOCKET , SO_RCVBUF , (char*)&outputValue , sizeof(outputValue)) != 0) {
perror("setsockopt failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
if(getsockopt(sockfd , SOL_SOCKET , SO_RCVBUF , (char*)&outputValue , &outputValue_len) != 0) {
perror("getsockopt failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
printf("tried to set socket receive buffer from %d to %d, got %d\n", defaultBuf , recvBufSize , outputValue);
if(isMulticastAddress(mediaIP)) {
struct ip_mreq multicastRequest;
memcpy(&multicastRequest.imr_multiaddr , &((struct sockaddr_in*)(mediaAddr->ai_addr))->sin_addr , sizeof(multicastRequest.imr_multiaddr));
multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY);
if(setsockopt(sockfd, IPPROTO_IP , IP_ADD_MEMBERSHIP , (char*) &multicastRequest , sizeof(multicastRequest)) != 0) {
perror("setsockopt failed");
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return -1;
}
}
if(localAddr)
freeaddrinfo(localAddr);
if(mediaAddr)
freeaddrinfo(mediaAddr);
return sockfd;
}
int multiCastConnectSocket(const char* multicastIP , const char* multicastPort) {
int sockfd;
struct addrinfo hints = { 0 };
struct addrinfo* res = 0;
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
int addrInfoStatus;
if((addrInfoStatus = getaddrinfo(multicastIP , multicastPort , &hints , &res)) != 0) {
if(res)
freeaddrinfo(res);
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(addrInfoStatus));
return -1;
}
if ((sockfd = socket(res->ai_family , res->ai_socktype , 0)) < 0) {
perror("socket() failed");
if(res)
freeaddrinfo(res);
return -1;
}
// allow multiple sockets to use the same PORT number
u_int reuse_port = 1;
if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &reuse_port, sizeof(reuse_port)) < 0) {
perror("setsockopt() failed");
if(res)
freeaddrinfo(res);
return -1;
}
if(res)
freeaddrinfo(res);
return sockfd;
}
int uCastConnectSocket(const char* unicastIP , const char* unicastPort) {
int sockfd;
struct addrinfo hints = { 0 };
struct addrinfo* res = 0;
int yes = 1;
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
int addrInfoStatus;
if((addrInfoStatus = getaddrinfo(unicastIP , unicastPort , &hints , &res)) != 0) {
if(res)
freeaddrinfo(res);
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(addrInfoStatus));
return -1;
}
if ((sockfd = socket(res->ai_family , res->ai_socktype , 0)) < 0) {
perror("socket() failed");
if(res)
freeaddrinfo(res);
return -1;
}
if (connect(sockfd, res->ai_addr, res->ai_addrlen) == -1) {
perror("connect() failed");
if(res)
freeaddrinfo(res);
return -1;
}
if(setsockopt(sockfd , SOL_SOCKET , SO_REUSEADDR , (char*)&yes , sizeof(int)) == -1) {
perror("setsockopt() failed");
if(res)
freeaddrinfo(res);
return -1;
}
if(res)
freeaddrinfo(res);
return sockfd;
}
int sendSocket(const char* recvIP , const char* recvPort) {
if(isMulticastAddress(recvIP))
return multiCastConnectSocket(recvIP, recvPort);
return uCastConnectSocket(recvIP, recvPort);
}
int maximumOfThreeNum( int a , int b , int c ) {
int max = ( a < b ) ? b : a;
return ( ( max < c ) ? c : max );
}
};
#endif