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/* $Id$ */
/** @file core/address.cpp Implementation of the address. */
#include "../../stdafx.h"
#ifdef ENABLE_NETWORK
#include "address.h"
#include "config.h"
#include "host.h"
#include "../../string_func.h"
#include "../../debug.h"
const char *NetworkAddress::GetHostname()
{
if (this->hostname == NULL) {
assert(this->address_length != 0);
char buf[NETWORK_HOSTNAME_LENGTH] = { '\0' };
getnameinfo((struct sockaddr *)&this->address, this->address_length, buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
this->hostname = strdup(buf);
}
return this->hostname;
}
uint16 NetworkAddress::GetPort() const
{
switch (this->address.ss_family) {
case AF_INET:
return ntohs(((struct sockaddr_in *)&this->address)->sin_port);
default:
NOT_REACHED();
}
}
void NetworkAddress::SetPort(uint16 port)
{
switch (this->address.ss_family) {
case AF_INET:
((struct sockaddr_in*)&this->address)->sin_port = htons(port);
break;
default:
NOT_REACHED();
}
}
const char *NetworkAddress::GetAddressAsString()
{
/* 6 = for the : and 5 for the decimal port number */
static char buf[NETWORK_HOSTNAME_LENGTH + 6];
seprintf(buf, lastof(buf), "%s:%d", this->GetHostname(), this->GetPort());
return buf;
}
/**
* Helper function to resolve without opening a socket.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
static SOCKET ResolveLoopProc(addrinfo *runp)
{
/* We just want the first 'entry', so return a valid socket. */
return !INVALID_SOCKET;
}
const sockaddr_storage *NetworkAddress::GetAddress()
{
if (!this->IsResolved()) {
/* Here we try to resolve a network address. We use SOCK_STREAM as
* socket type because some stupid OSes, like Solaris, cannot be
* bothered to implement the specifications and allow '0' as value
* that means "don't care whether it is SOCK_STREAM or SOCK_DGRAM".
*/
this->Resolve(this->address.ss_family, SOCK_STREAM, AI_ADDRCONFIG, ResolveLoopProc);
}
return &this->address;
}
SOCKET NetworkAddress::Resolve(int family, int socktype, int flags, LoopProc func)
{
struct addrinfo *ai;
struct addrinfo hints;
memset(&hints, 0, sizeof (hints));
hints.ai_family = family;
hints.ai_flags = flags;
hints.ai_socktype = socktype;
/* The port needs to be a string. Six is enough to contain all characters + '\0'. */
char port_name[6];
seprintf(port_name, lastof(port_name), "%u", this->GetPort());
int e = getaddrinfo(this->GetHostname(), port_name, &hints, &ai);
if (e != 0) {
DEBUG(net, 0, "getaddrinfo failed: %s", FS2OTTD(gai_strerror(e)));
return INVALID_SOCKET;
}
SOCKET sock = INVALID_SOCKET;
for (struct addrinfo *runp = ai; runp != NULL; runp = runp->ai_next) {
sock = func(runp);
if (sock == INVALID_SOCKET) continue;
this->address_length = runp->ai_addrlen;
assert(sizeof(this->address) >= runp->ai_addrlen);
memcpy(&this->address, runp->ai_addr, runp->ai_addrlen);
break;
}
freeaddrinfo (ai);
return sock;
}
/**
* Helper function to resolve a connected socket.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
static SOCKET ConnectLoopProc(addrinfo *runp)
{
SOCKET sock = socket(runp->ai_family, runp->ai_socktype, runp->ai_protocol);
if (sock == INVALID_SOCKET) {
DEBUG(net, 1, "Could not create socket: %s", strerror(errno));
return INVALID_SOCKET;
}
if (!SetNoDelay(sock)) DEBUG(net, 1, "Setting TCP_NODELAY failed");
if (connect(sock, runp->ai_addr, runp->ai_addrlen) != 0) {
DEBUG(net, 1, "Could not connect socket: %s", strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
/* Connection succeeded */
if (!SetNonBlocking(sock)) DEBUG(net, 0, "Setting non-blocking mode failed");
return sock;
}
SOCKET NetworkAddress::Connect()
{
DEBUG(net, 1, "Connecting to %s", this->GetAddressAsString());
return this->Resolve(0, SOCK_STREAM, AI_ADDRCONFIG, ConnectLoopProc);
}
/**
* Helper function to resolve a listening.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
static SOCKET ListenLoopProc(addrinfo *runp)
{
SOCKET sock = socket(runp->ai_family, runp->ai_socktype, runp->ai_protocol);
if (sock == INVALID_SOCKET) {
DEBUG(net, 1, "Could not create socket: %s", strerror(errno));
return INVALID_SOCKET;
}
if (!SetNoDelay(sock)) DEBUG(net, 1, "Setting TCP_NODELAY failed");
if (bind(sock, runp->ai_addr, runp->ai_addrlen) != 0) {
DEBUG(net, 1, "Could not bind: %s", strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
if (runp->ai_socktype != SOCK_DGRAM && listen(sock, 1) != 0) {
DEBUG(net, 1, "Could not listen: %s", strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
/* Connection succeeded */
if (!SetNonBlocking(sock)) DEBUG(net, 0, "Setting non-blocking mode failed");
return sock;
}
SOCKET NetworkAddress::Listen(int family, int socktype)
{
return this->Resolve(family, socktype, AI_ADDRCONFIG | AI_PASSIVE, ListenLoopProc);
}
#endif /* ENABLE_NETWORK */
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