// Deletes the given port from the system port table.
void
delete_port(Port::Id id)
{
if (port_table.find(id))
port_table.dealloc(id);
}
// TCP Port thread work function. Expects the internal port id to be passed
// as an argument, which is used to drive that port.
void*
tcp_work_fn(void* arg)
{
// Grab a pointer to the port object you are driving.
Port_tcp* self = (Port_tcp*)port_table.find(*((int*)arg));
// Setup epoll.
struct epoll_event event, event_list[10];
struct sockaddr_in addr = self->dst_addr_;
socklen_t slen = sizeof(addr);
int sock_fd, conn_fd, epoll_fd, res;
sock_fd = self->sock_fd_;
if ((epoll_fd = epoll_create1(0)) == -1)
perror(std::string("port[" + std::to_string(self->id()) +
"] epoll_create").c_str());
// Listen for input events.
event.events = EPOLLIN | EPOLLET;
event.data.fd = sock_fd;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock_fd, &event) == -1)
perror(std::string("port[" + std::to_string(self->id()) +
"] epoll_ctl_add").c_str());
// Run while the FD is valid.
while (fcntl(sock_fd, F_GETFD) != EBADF) {
res = epoll_wait(epoll_fd, event_list, 10, 1000);
// Receive messages/report errors.
if (res < 0) {
perror(std::string("port[" + std::to_string(self->id()) +
"]").c_str());
continue;
}
else {
for (int i = 0; i < res; i++) {
if (event_list[i].data.fd == sock_fd) {
// We have a new connection coming in.
conn_fd = accept(sock_fd, (struct sockaddr*)&addr, &slen);
if (conn_fd == -1) {
perror(std::string("port[" + std::to_string(self->id()) +
"]").c_str());
continue;
}
else {
// Set the socket to be non-blocking.
int flags = fcntl(conn_fd, F_GETFL, 0);
fcntl(conn_fd, F_SETFL, flags | O_NONBLOCK);
// Add to the epoll set.
event.events = EPOLLIN | EPOLLET;
event.data.fd = conn_fd;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, conn_fd, &event) == -1)
perror(std::string("port[" + std::to_string(self->id()) +
"]").c_str());
}
}
else {
// A message from a known client has been received. Process it.
self->io_fd_ = event_list[i].data.fd;
Context* cxt = self->recv();
thread_pool.assign(new Task("pipeline", cxt));
}
}
}
// Send any packets buffered for TX.
self->send();
}
return 0;
}