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#include "gsocket.h"
#include <errno.h> // For errno
#ifdef _WIN32
static bool initialized = false;
#endif
void GSocketErr(GStr message, bool inclSysMsg) {
if (inclSysMsg) {
message.append(": ");
message.append(strerror(errno));
}
GError("%s\n",message.chars());
}
// Function to fill in address structure given an address and port
static void fillAddr(const GStr &address, unsigned short port,
sockaddr_in &addr) {
memset(&addr, 0, sizeof(addr)); // Zero out address structure
addr.sin_family = AF_INET; // Internet address
hostent *host; // Resolve name
if ((host = gethostbyname(address.chars())) == NULL) {
// strerror() will not work for gethostbyname() and hstrerror()
// is supposedly obsolete
GSocketErr("Failed to resolve name (gethostbyname())");
}
addr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
addr.sin_port = htons(port); // Assign port in network byte order
}
// GSocket Code
GSocket::GSocket(int type, int protocol) {
#ifdef _WIN32
if (!initialized) {
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD(2, 0); // Request WinSock v2.0
if (WSAStartup(wVersionRequested, &wsaData) != 0) { // Load WinSock DLL
GSocketErr("Unable to load WinSock DLL");
}
initialized = true;
}
#endif
// Make a new socket
if ((sockDesc = socket(PF_INET, type, protocol)) < 0) {
GSocketErr("GSocket creation failed (socket())", true);
}
}
GSocket::~GSocket() {
#ifdef _WIN32
::closesocket(sockDesc);
#else
::close(sockDesc);
#endif
sockDesc = -1;
}
GStr GSocket::getLocalAddress() {
sockaddr_in addr;
unsigned int addr_len = sizeof(addr);
if (getsockname(sockDesc, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) {
GSocketErr("Fetch of local address failed (getsockname())", true);
}
return inet_ntoa(addr.sin_addr);
}
unsigned short GSocket::getLocalPort() {
sockaddr_in addr;
unsigned int addr_len = sizeof(addr);
if (getsockname(sockDesc, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) {
GSocketErr("Fetch of local port failed (getsockname())", true);
}
return ntohs(addr.sin_port);
}
void GSocket::setLocalPort(unsigned short localPort) {
// Bind the socket to its port
sockaddr_in localAddr;
memset(&localAddr, 0, sizeof(localAddr));
localAddr.sin_family = AF_INET;
localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
localAddr.sin_port = htons(localPort);
if (bind(sockDesc, (sockaddr *) &localAddr, sizeof(sockaddr_in)) < 0) {
GSocketErr("Set of local port failed (bind())", true);
}
}
void GSocket::setLocalAddressAndPort(const GStr &localAddress,
unsigned short localPort) {
// Get the address of the requested host
sockaddr_in localAddr;
fillAddr(localAddress, localPort, localAddr);
if (bind(sockDesc, (sockaddr *) &localAddr, sizeof(sockaddr_in)) < 0) {
GSocketErr("Set of local address and port failed (bind())", true);
}
}
void GSocket::cleanUp() {
#ifdef _WIN32
if (WSACleanup() != 0) {
GSocketErr("WSACleanup() failed");
}
#endif
}
unsigned short GSocket::resolveService(const GStr &service,
const GStr &protocol) {
struct servent *serv; /* Structure containing service information */
if ((serv = getservbyname(service.chars(), protocol.chars())) == NULL)
return atoi(service.chars()); /* Service is port number */
else
return ntohs(serv->s_port); /* Found port (network byte order) by name */
}
// GCommSocket Code
void GCommSocket::setTimeout(int microsecs) {
#ifdef _WIN32
DWORD timeout = microsecs;
setsockopt(sockDesc, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout, sizeof(timeout));
#else
struct timeval tv;
if (microsecs>1000) {
tv.tv_sec=microsecs / 1000;
tv.tv_usec=microsecs % 1000;
} else {
tv.tv_sec=0;
tv.tv_usec=microsecs;
}
setsockopt(sockDesc, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv,sizeof(struct timeval));
#endif
}
void GCommSocket::connect(const GStr &foreignAddress,
unsigned short foreignPort) {
// Get the address of the requested host
sockaddr_in destAddr;
fillAddr(foreignAddress, foreignPort, destAddr);
// Try to connect to the given port
if (::connect(sockDesc, (sockaddr *) &destAddr, sizeof(destAddr)) < 0) {
GSocketErr("Connect failed (connect())", true);
}
}
void GCommSocket::send(const void *buffer, int bufferLen) {
if (::send(sockDesc, (raw_type *) buffer, bufferLen, 0) < 0) {
GSocketErr("Send failed (send())", true);
}
}
int GCommSocket::recv(void *buffer, int bufferLen) {
int rtn;
if ((rtn = ::recv(sockDesc, (raw_type *) buffer, bufferLen, 0)) < 0) {
GSocketErr("Received failed (recv())", true);
}
return rtn;
}
GStr GCommSocket::recvline() {
GStr r;
char buf[1024];
char* p=NULL;
while (p==NULL) {
int rtn = ::recv(sockDesc, (raw_type *) buf, 1024, 0);
if (rtn<0) GSocketErr("Received failed (recv())", true);
if (rtn==0) return r;
p=(char*)memchr((void*)buf, '\n', rtn);
if (p) {
r.appendmem(buf, p-buf);
return r;
}
r.appendmem(buf, rtn);
}
return r;
}
GStr GCommSocket::getForeignAddress() {
sockaddr_in addr;
unsigned int addr_len = sizeof(addr);
if (getpeername(sockDesc, (sockaddr *) &addr,(socklen_t *) &addr_len) < 0) {
//GSocketErr("Fetch of foreign address failed (getpeername())", true);
return "";
}
return inet_ntoa(addr.sin_addr);
}
unsigned short GCommSocket::getForeignPort() {
sockaddr_in addr;
unsigned int addr_len = sizeof(addr);
if (getpeername(sockDesc, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) {
return 0;
}
return ntohs(addr.sin_port);
}
// GTCPServerSocket Code
GTCPSocket *GTCPServerSocket::accept() {
int newConnSD;
if ((newConnSD = ::accept(sockDesc, NULL, 0)) < 0) {
GSocketErr("Accept failed (accept())", true);
}
return new GTCPSocket(newConnSD);
}
void GTCPServerSocket::setListen(int queueLen) {
if (listen(sockDesc, queueLen) < 0)
GSocketErr("Set listening socket failed (listen())", true);
}
// GUDPSocket Code
void GUDPSocket::setBroadcast() {
// If this fails, we'll hear about it when we try to send. This will allow
// system that cannot broadcast to continue if they don't plan to broadcast
int broadcastPermission = 1;
setsockopt(sockDesc, SOL_SOCKET, SO_BROADCAST,
(raw_type *) &broadcastPermission, sizeof(broadcastPermission));
}
void GUDPSocket::disconnect() {
sockaddr_in nullAddr;
memset(&nullAddr, 0, sizeof(nullAddr));
nullAddr.sin_family = AF_UNSPEC;
// Try to disconnect
if (::connect(sockDesc, (sockaddr *) &nullAddr, sizeof(nullAddr)) < 0) {
#ifdef _WIN32
if (errno != WSAEAFNOSUPPORT) {
#else
if (errno != EAFNOSUPPORT) {
#endif
GSocketErr("Disconnect failed (connect())", true);
}
}
}
void GUDPSocket::sendTo(const void *buffer, int bufferLen,
const GStr &foreignAddress, unsigned short foreignPort) {
sockaddr_in destAddr;
fillAddr(foreignAddress, foreignPort, destAddr);
// Write out the whole buffer as a single message.
if (sendto(sockDesc, (raw_type *) buffer, bufferLen, 0,
(sockaddr *) &destAddr, sizeof(destAddr)) != bufferLen) {
GSocketErr("Send failed (sendto())", true);
}
}
int GUDPSocket::recvFrom(void *buffer, int bufferLen, GStr &sourceAddress,
unsigned short &sourcePort) {
sockaddr_in clntAddr;
socklen_t addrLen = sizeof(clntAddr);
int rtn;
if ((rtn = recvfrom(sockDesc, (raw_type *) buffer, bufferLen, 0,
(sockaddr *) &clntAddr, (socklen_t *) &addrLen)) < 0) {
GSocketErr("Receive failed (recvfrom())", true);
}
sourceAddress = inet_ntoa(clntAddr.sin_addr);
sourcePort = ntohs(clntAddr.sin_port);
return rtn;
}
void GUDPSocket::setMulticastTTL(unsigned char multicastTTL) {
if (setsockopt(sockDesc, IPPROTO_IP, IP_MULTICAST_TTL,
(raw_type *) &multicastTTL, sizeof(multicastTTL)) < 0) {
GSocketErr("Multicast TTL set failed (setsockopt())", true);
}
}
void GUDPSocket::joinGroup(const GStr &multicastGroup) {
struct ip_mreq multicastRequest;
multicastRequest.imr_multiaddr.s_addr = inet_addr(multicastGroup.chars());
multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY);
if (setsockopt(sockDesc, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(raw_type *) &multicastRequest,
sizeof(multicastRequest)) < 0) {
GSocketErr("Multicast group join failed (setsockopt())", true);
}
}
void GUDPSocket::leaveGroup(const GStr &multicastGroup) {
struct ip_mreq multicastRequest;
multicastRequest.imr_multiaddr.s_addr = inet_addr(multicastGroup.chars());
multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY);
if (setsockopt(sockDesc, IPPROTO_IP, IP_DROP_MEMBERSHIP,
(raw_type *) &multicastRequest,
sizeof(multicastRequest)) < 0) {
GSocketErr("Multicast group leave failed (setsockopt())", true);
}
}
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