bool InspIRCd::BindPort(ConfigTag* tag, const irc::sockets::sockaddrs& sa, std::vector<ListenSocket*>& old_ports)
{
for (std::vector<ListenSocket*>::iterator n = old_ports.begin(); n != old_ports.end(); ++n)
{
if ((**n).bind_sa == sa)
{
// Replace tag, we know addr and port match, but other info (type, ssl) may not.
ServerInstance->Logs.Log("SOCKET", LOG_DEFAULT, "Replacing listener on %s from old tag at %s with new tag from %s",
sa.str().c_str(), (*n)->bind_tag->getTagLocation().c_str(), tag->getTagLocation().c_str());
(*n)->bind_tag = tag;
(*n)->ResetIOHookProvider();
old_ports.erase(n);
return true;
}
}
ListenSocket* ll = new ListenSocket(tag, sa);
if (ll->GetFd() < 0)
{
ServerInstance->Logs.Log("SOCKET", LOG_DEFAULT, "Failed to listen on %s from tag at %s: %s",
sa.str().c_str(), tag->getTagLocation().c_str(), strerror(errno));
delete ll;
return false;
}
ServerInstance->Logs.Log("SOCKET", LOG_DEFAULT, "Added a listener on %s from tag at %s", sa.str().c_str(), tag->getTagLocation().c_str());
ports.push_back(ll);
return true;
}
ListenSocket::ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_to)
: bind_tag(tag)
{
irc::sockets::satoap(bind_to, bind_addr, bind_port);
bind_desc = bind_to.str();
fd = socket(bind_to.sa.sa_family, SOCK_STREAM, 0);
if (this->fd == -1)
return;
#ifdef IPV6_V6ONLY
/* This OS supports IPv6 sockets that can also listen for IPv4
* connections. If our address is "*" or empty, enable both v4 and v6 to
* allow for simpler configuration on dual-stack hosts. Otherwise, if it
* is "::" or an IPv6 address, disable support so that an IPv4 bind will
* work on the port (by us or another application).
*/
if (bind_to.sa.sa_family == AF_INET6)
{
std::string addr = tag->getString("address");
/* This must be >= sizeof(DWORD) on Windows */
const int enable = (addr.empty() || addr == "*") ? 0 : 1;
/* This must be before bind() */
setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char *>(&enable), sizeof(enable));
// errors ignored intentionally
}
#endif
ServerInstance->SE->SetReuse(fd);
int rv = ServerInstance->SE->Bind(this->fd, bind_to);
if (rv >= 0)
rv = ServerInstance->SE->Listen(this->fd, ServerInstance->Config->MaxConn);
int timeout = tag->getInt("defer", 0);
if (timeout && !rv)
{
#if defined TCP_DEFER_ACCEPT
setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, sizeof(timeout));
#elif defined SO_ACCEPTFILTER
struct accept_filter_arg afa;
memset(&afa, 0, sizeof(afa));
strcpy(afa.af_name, "dataready");
setsockopt(fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));
#endif
}
if (rv < 0)
{
int errstore = errno;
ServerInstance->SE->Shutdown(this, 2);
ServerInstance->SE->Close(this);
this->fd = -1;
errno = errstore;
}
else
{
ServerInstance->SE->NonBlocking(this->fd);
ServerInstance->SE->AddFd(this, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
}
}