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/*
* select
*/
#include <sys/select.h>
#include <vdr/plugin.h>
#include <vdr/timers.h>
#include "sock.h"
#include "select.h"
#include "handler.h"
#include "helpers.h"
struct node {
cVdrmanagerClientSocket * socket;
node * next;
};
cSelect::cSelect() {
serversocket = NULL;
clientsockets = NULL;
clientsocketcount = 0;
handler = new cHandler;
pollfds = NULL;
stopped = false;
nexttimer = 0;
shutdown = 0;
}
cSelect::~cSelect() {
if (serversocket)
delete serversocket;
while (clientsockets) {
node * next = clientsockets->next;
delete clientsockets->socket;
delete clientsockets;
clientsockets = next;
}
if (handler)
delete handler;
if (pollfds)
delete pollfds;
}
void cSelect::SetServerSocket(cVdrmanagerServerSocket * sock) {
serversocket = sock;
}
void cSelect::AddClientSocket(cVdrmanagerClientSocket * sock) {
// remember socket
node * newnode = new node;
newnode->next = clientsockets;
newnode->socket = sock;
clientsockets = newnode;
clientsocketcount++;
}
void cSelect::RemoveClientSocket(cVdrmanagerClientSocket * sock) {
node * curnode = clientsockets;
node * lastnode = NULL;
while (curnode) {
if (curnode->socket == sock) {
// unlink node
if (lastnode)
lastnode->next = curnode->next;
else
clientsockets = curnode->next;
// free socket and node
delete curnode->socket;
delete curnode;
clientsocketcount--;
break;
}
lastnode = curnode;
curnode = curnode->next;
}
if (clientsockets) {
curnode = clientsockets;
while (curnode) {
curnode = curnode->next;
}
}
}
cVdrmanagerClientSocket * cSelect::GetClientSocket(int sock) {
node * curnode = clientsockets;
while (curnode) {
if (curnode->socket->GetSocket() == sock)
return curnode->socket;
curnode = curnode->next;
}
return NULL;
}
bool cSelect::Action() {
for (; !stopped;) {
if (!Poll())
return false;
}
return true;
}
void cSelect::CreatePollfds() {
// we poll for the server socket and for each client socket
pollfds = new struct pollfd[clientsocketcount + 1];
pollfds[0].fd = serversocket->GetSocket();
pollfds[0].events = POLLIN;
node * curnode = clientsockets;
int i = 1;
while (curnode) {
pollfds[i].fd = curnode->socket->GetSocket();
pollfds[i].events = POLLIN | POLLHUP;
if (curnode->socket->WritePending()) {
pollfds[i].events |= POLLOUT;
}
pollfds[i++].revents = 0;
curnode = curnode->next;
}
}
bool cSelect::Poll() {
// poll for events
CreatePollfds();
int rc = 0;
while ((rc = poll(pollfds, clientsocketcount + 1, -1)) < 0) {
if (errno != EINTR)
break;
}
if (rc < 0) {
LOG_ERROR;
delete pollfds;
return false;
}
// timeout?
if (rc == 0)
return true;
// client requests or outstanding writes
for (int i = 1; i < clientsocketcount + 1; i++) {
cVdrmanagerClientSocket * sock = GetClientSocket(pollfds[i].fd);
if (sock) {
if (pollfds[i].revents & POLLOUT) {
// possibly outstanding writes
sock->Flush();
} else if (pollfds[i].revents & (POLLIN | POLLHUP)) {
// client request
handler->HandleClientRequest(sock);
}
// disconnect?
if (sock->Disconnected()) {
RemoveClientSocket(sock);
}
}
}
// new client?
if (pollfds[0].revents & POLLIN) {
// get client socket
cVdrmanagerClientSocket * sock = serversocket->Accept();
if (sock) {
// Add client socket
AddClientSocket(sock);
// Send current data
handler->HandleNewClient(sock);
}
}
delete pollfds;
return true;
}
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