net.c

#include <string.h>

#ifdef __linux__

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <fcntl.h>
#include <netinet/in.h>

#else

#include <winsock2.h>
#include <ws2tcpip.h>

#endif

#include "minerlog.h"
#include "minernet.h"

int NetworkingInit(void)
{
	#ifdef __linux__
	return(0);
	#else
	WSADATA data;
	return(WSAStartup(MAKEWORD(2, 0), &data));
	#endif
}

void NetworkingShutdown(void)
{
	#ifndef __linux__
	WSACleanup();
	#endif
}

int ConnectToPool(char *URL, char *Port)
{
	int ret, sockfd;
	struct addrinfo filter, *poolinfo, *tmp;
	
	memset(&filter, 0, sizeof(struct addrinfo));
	filter.ai_family = AF_INET;
	filter.ai_socktype = SOCK_STREAM;
	filter.ai_flags = AI_PASSIVE;
	filter.ai_protocol = IPPROTO_TCP;
	
	ret = getaddrinfo(URL, Port, &filter, &poolinfo);
	
	if(ret)
	{
		Log(LOG_CRITICAL, "The attempt to get the address for the pool failed with code %d.", ret);
		return(INVALID_SOCKET);
	}
	
	sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if(sockfd == INVALID_SOCKET)
	{
		Log(LOG_CRITICAL, "The attempt to create a socket failed.");
		freeaddrinfo(poolinfo);
		return(INVALID_SOCKET);
	}
	
	for(tmp = poolinfo; tmp; tmp = tmp->ai_next)
	{
		ret = connect(sockfd, tmp->ai_addr, tmp->ai_addrlen);
		if(ret != INVALID_SOCKET) break;
		
		Log(LOG_ADVINFO, "The attempt to connect to the pool failed.");
	}
	
	// Did we run out of addresses before successfully connecting?
	if(!tmp)
	{
		Log(LOG_CRITICAL, "Failed to connect to any of the pool's addresses.");
		freeaddrinfo(poolinfo);
		return(INVALID_SOCKET);
	}
	
	freeaddrinfo(poolinfo);
	return(sockfd);
}

int SetNonBlockingSocket(SOCKET sockfd)
{
	// Set socket to non-blocking mode
	
	#ifdef __linux__
	
	int iof = fcntl(sockfd, F_GETFL, 0);
	fcntl(sockfd, F_SETFL, iof | O_NONBLOCK);
	
	#else
	
	unsigned long int enable = 1;
	ioctlsocket(sockfd, FIONBIO, &enable);
	
	#endif
	
	{
		int keepalive = 1;
		setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &keepalive, sizeof(keepalive));
	}
	return(0);
}