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Location: cpp/openttd-patchpack/source/src/network/core/address.cpp
r13313:97d2c9ffa6c1
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(svn r17832) -Codechange: make Alberth happier
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/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file core/address.cpp Implementation of the address. */
#include "../../stdafx.h"
#ifdef ENABLE_NETWORK
#include "address.h"
#include "../../debug.h"
const char *NetworkAddress::GetHostname()
{
if (StrEmpty(this->hostname) && this->address.ss_family != AF_UNSPEC) {
assert(this->address_length != 0);
getnameinfo((struct sockaddr *)&this->address, this->address_length, this->hostname, sizeof(this->hostname), NULL, 0, NI_NUMERICHOST);
}
return this->hostname;
}
uint16 NetworkAddress::GetPort() const
{
switch (this->address.ss_family) {
case AF_UNSPEC:
case AF_INET:
return ntohs(((struct sockaddr_in *)&this->address)->sin_port);
case AF_INET6:
return ntohs(((struct sockaddr_in6 *)&this->address)->sin6_port);
default:
NOT_REACHED();
}
}
void NetworkAddress::SetPort(uint16 port)
{
switch (this->address.ss_family) {
case AF_UNSPEC:
case AF_INET:
((struct sockaddr_in*)&this->address)->sin_port = htons(port);
break;
case AF_INET6:
((struct sockaddr_in6*)&this->address)->sin6_port = htons(port);
break;
default:
NOT_REACHED();
}
}
void NetworkAddress::GetAddressAsString(char *buffer, const char *last, bool with_family)
{
if (this->GetAddress()->ss_family == AF_INET6) buffer = strecpy(buffer, "[", last);
buffer = strecpy(buffer, this->GetHostname(), last);
if (this->GetAddress()->ss_family == AF_INET6) buffer = strecpy(buffer, "]", last);
buffer += seprintf(buffer, last, ":%d", this->GetPort());
if (with_family) {
char family;
switch (this->address.ss_family) {
case AF_INET: family = '4'; break;
case AF_INET6: family = '6'; break;
default: family = '?'; break;
}
seprintf(buffer, last, " (IPv%c)", family);
}
}
const char *NetworkAddress::GetAddressAsString(bool with_family)
{
/* 6 = for the : and 5 for the decimal port number */
static char buf[NETWORK_HOSTNAME_LENGTH + 6 + 7];
this->GetAddressAsString(buf, lastof(buf), with_family);
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, NULL, ResolveLoopProc);
}
return &this->address;
}
bool NetworkAddress::IsFamily(int family)
{
if (!this->IsResolved()) {
this->Resolve(family, SOCK_STREAM, AI_ADDRCONFIG, NULL, ResolveLoopProc);
}
return this->address.ss_family == family;
}
bool NetworkAddress::IsInNetmask(char *netmask)
{
/* Resolve it if we didn't do it already */
if (!this->IsResolved()) this->GetAddress();
int cidr = this->address.ss_family == AF_INET ? 32 : 128;
NetworkAddress mask_address;
/* Check for CIDR separator */
char *chr_cidr = strchr(netmask, '/');
if (chr_cidr != NULL) {
int tmp_cidr = atoi(chr_cidr + 1);
/* Invalid CIDR, treat as single host */
if (tmp_cidr > 0 || tmp_cidr < cidr) cidr = tmp_cidr;
/* Remove and then replace the / so that NetworkAddress works on the IP portion */
*chr_cidr = '\0';
mask_address = NetworkAddress(netmask, 0, this->address.ss_family);
*chr_cidr = '/';
} else {
mask_address = NetworkAddress(netmask, 0, this->address.ss_family);
}
if (mask_address.GetAddressLength() == 0) return false;
uint32 *ip;
uint32 *mask;
switch (this->address.ss_family) {
case AF_INET:
ip = (uint32*)&((struct sockaddr_in*)&this->address)->sin_addr.s_addr;
mask = (uint32*)&((struct sockaddr_in*)&mask_address.address)->sin_addr.s_addr;
break;
case AF_INET6:
ip = (uint32*)&((struct sockaddr_in6*)&this->address)->sin6_addr;
mask = (uint32*)&((struct sockaddr_in6*)&mask_address.address)->sin6_addr;
break;
default:
NOT_REACHED();
}
while (cidr > 0) {
uint32 msk = cidr >= 32 ? (uint32)-1 : htonl(-(1 << (32 - cidr)));
if ((*mask & msk) != (*ip & msk)) return false;
cidr -= 32;
}
return true;
}
SOCKET NetworkAddress::Resolve(int family, int socktype, int flags, SocketList *sockets, 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());
bool reset_hostname = false;
/* Setting both hostname to NULL and port to 0 is not allowed.
* As port 0 means bind to any port, the other must mean that
* we want to bind to 'all' IPs. */
if (StrEmpty(this->hostname) && this->address_length == 0 && this->GetPort() == 0) {
reset_hostname = true;
int fam = this->address.ss_family;
if (fam == AF_UNSPEC) fam = family;
strecpy(this->hostname, fam == AF_INET ? "0.0.0.0" : "::", lastof(this->hostname));
}
int e = getaddrinfo(StrEmpty(this->hostname) ? NULL : this->hostname, port_name, &hints, &ai);
if (reset_hostname) strecpy(this->hostname, "", lastof(this->hostname));
if (e != 0) {
if (func != ResolveLoopProc) {
DEBUG(net, 0, "getaddrinfo for hostname \"%s\", port %s, address family %s and socket type %s failed: %s",
this->hostname, port_name, AddressFamilyAsString(family), SocketTypeAsString(socktype), FS2OTTD(gai_strerror(e)));
}
return INVALID_SOCKET;
}
SOCKET sock = INVALID_SOCKET;
for (struct addrinfo *runp = ai; runp != NULL; runp = runp->ai_next) {
/* When we are binding to multiple sockets, make sure we do not
* connect to one with exactly the same address twice. That's
* ofcourse totally unneeded ;) */
if (sockets != NULL) {
NetworkAddress address(runp->ai_addr, (int)runp->ai_addrlen);
if (sockets->Find(address) != sockets->End()) continue;
}
sock = func(runp);
if (sock == INVALID_SOCKET) continue;
if (sockets == NULL) {
this->address_length = (int)runp->ai_addrlen;
assert(sizeof(this->address) >= runp->ai_addrlen);
memcpy(&this->address, runp->ai_addr, runp->ai_addrlen);
break;
}
NetworkAddress addr(runp->ai_addr, (int)runp->ai_addrlen);
(*sockets)[addr] = sock;
sock = INVALID_SOCKET;
}
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)
{
const char *type = NetworkAddress::SocketTypeAsString(runp->ai_socktype);
const char *family = NetworkAddress::AddressFamilyAsString(runp->ai_family);
const char *address = NetworkAddress(runp->ai_addr, (int)runp->ai_addrlen).GetAddressAsString();
SOCKET sock = socket(runp->ai_family, runp->ai_socktype, runp->ai_protocol);
if (sock == INVALID_SOCKET) {
DEBUG(net, 1, "[%s] could not create %s socket: %s", type, family, strerror(errno));
return INVALID_SOCKET;
}
if (!SetNoDelay(sock)) DEBUG(net, 1, "[%s] setting TCP_NODELAY failed", type);
if (connect(sock, runp->ai_addr, (int)runp->ai_addrlen) != 0) {
DEBUG(net, 1, "[%s] could not connect %s socket: %s", type, family, strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
/* Connection succeeded */
if (!SetNonBlocking(sock)) DEBUG(net, 0, "[%s] setting non-blocking mode failed", type);
DEBUG(net, 1, "[%s] connected to %s", type, address);
return sock;
}
SOCKET NetworkAddress::Connect()
{
DEBUG(net, 1, "Connecting to %s", this->GetAddressAsString());
return this->Resolve(AF_UNSPEC, SOCK_STREAM, AI_ADDRCONFIG, NULL, 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)
{
const char *type = NetworkAddress::SocketTypeAsString(runp->ai_socktype);
const char *family = NetworkAddress::AddressFamilyAsString(runp->ai_family);
const char *address = NetworkAddress(runp->ai_addr, (int)runp->ai_addrlen).GetAddressAsString();
SOCKET sock = socket(runp->ai_family, runp->ai_socktype, runp->ai_protocol);
if (sock == INVALID_SOCKET) {
DEBUG(net, 0, "[%s] could not create %s socket on port %s: %s", type, family, address, strerror(errno));
return INVALID_SOCKET;
}
if (runp->ai_socktype == SOCK_STREAM && !SetNoDelay(sock)) {
DEBUG(net, 3, "[%s] setting TCP_NODELAY failed for port %s", type, address);
}
int on = 1;
/* The (const char*) cast is needed for windows!! */
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on)) == -1) {
DEBUG(net, 3, "[%s] could not set reusable %s sockets for port %s: %s", type, family, address, strerror(errno));
}
if (runp->ai_family == AF_INET6 &&
setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&on, sizeof(on)) == -1) {
DEBUG(net, 3, "[%s] could not disable IPv4 over IPv6 on port %s: %s", type, address, strerror(errno));
}
if (bind(sock, runp->ai_addr, (int)runp->ai_addrlen) != 0) {
DEBUG(net, 1, "[%s] could not bind on %s port %s: %s", type, family, address, strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
if (runp->ai_socktype != SOCK_DGRAM && listen(sock, 1) != 0) {
DEBUG(net, 1, "[%s] could not listen at %s port %s: %s", type, family, address, strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
/* Connection succeeded */
if (!SetNonBlocking(sock)) DEBUG(net, 0, "[%s] setting non-blocking mode failed for %s port %s", type, family, address);
DEBUG(net, 1, "[%s] listening on %s port %s", type, family, address);
return sock;
}
void NetworkAddress::Listen(int socktype, SocketList *sockets)
{
assert(sockets != NULL);
/* Setting both hostname to NULL and port to 0 is not allowed.
* As port 0 means bind to any port, the other must mean that
* we want to bind to 'all' IPs. */
if (this->address_length == 0 && this->address.ss_family == AF_UNSPEC &&
StrEmpty(this->hostname) && this->GetPort() == 0) {
this->Resolve(AF_INET, socktype, AI_ADDRCONFIG | AI_PASSIVE, sockets, ListenLoopProc);
this->Resolve(AF_INET6, socktype, AI_ADDRCONFIG | AI_PASSIVE, sockets, ListenLoopProc);
} else {
this->Resolve(AF_UNSPEC, socktype, AI_ADDRCONFIG | AI_PASSIVE, sockets, ListenLoopProc);
}
}
/* static */ const char *NetworkAddress::SocketTypeAsString(int socktype)
{
switch (socktype) {
case SOCK_STREAM: return "tcp";
case SOCK_DGRAM: return "udp";
default: return "unsupported";
}
}
/* static */ const char *NetworkAddress::AddressFamilyAsString(int family)
{
switch (family) {
case AF_UNSPEC: return "either IPv4 or IPv6";
case AF_INET: return "IPv4";
case AF_INET6: return "IPv6";
default: return "unsupported";
}
}
#endif /* ENABLE_NETWORK */
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