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@ r26736:7ad626023660
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Location: cpp/openttd-patchpack/source/src/network/core/host.cpp
r26736:7ad626023660
4.7 KiB
text/x-c
Update: Translations from eints
luxembourgish: 3 changes by phreeze83
hebrew: 125 changes by haimlm
luxembourgish: 3 changes by phreeze83
hebrew: 125 changes by haimlm
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | /*
* 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 host.cpp Functions related to getting host specific data (IPs). */
#include "../../stdafx.h"
#include "../../debug.h"
#include "address.h"
#include "../../safeguards.h"
/**
* Internal implementation for finding the broadcast IPs.
* This function is implemented multiple times for multiple targets.
* @param broadcast the list of broadcasts to write into.
*/
static void NetworkFindBroadcastIPsInternal(NetworkAddressList *broadcast);
#if defined(HAVE_GETIFADDRS)
static void NetworkFindBroadcastIPsInternal(NetworkAddressList *broadcast) // GETIFADDRS implementation
{
struct ifaddrs *ifap, *ifa;
if (getifaddrs(&ifap) != 0) return;
for (ifa = ifap; ifa != nullptr; ifa = ifa->ifa_next) {
if (!(ifa->ifa_flags & IFF_BROADCAST)) continue;
if (ifa->ifa_broadaddr == nullptr) continue;
if (ifa->ifa_broadaddr->sa_family != AF_INET) continue;
NetworkAddress addr(ifa->ifa_broadaddr, sizeof(sockaddr));
if (std::none_of(broadcast->begin(), broadcast->end(), [&addr](NetworkAddress const& elem) -> bool { return elem == addr; })) broadcast->push_back(addr);
}
freeifaddrs(ifap);
}
#elif defined(_WIN32)
static void NetworkFindBroadcastIPsInternal(NetworkAddressList *broadcast) // Win32 implementation
{
SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == INVALID_SOCKET) return;
DWORD len = 0;
int num = 2;
INTERFACE_INFO *ifo = CallocT<INTERFACE_INFO>(num);
for (;;) {
if (WSAIoctl(sock, SIO_GET_INTERFACE_LIST, nullptr, 0, ifo, num * sizeof(*ifo), &len, nullptr, nullptr) == 0) break;
free(ifo);
if (WSAGetLastError() != WSAEFAULT) {
closesocket(sock);
return;
}
num *= 2;
ifo = CallocT<INTERFACE_INFO>(num);
}
for (uint j = 0; j < len / sizeof(*ifo); j++) {
if (ifo[j].iiFlags & IFF_LOOPBACK) continue;
if (!(ifo[j].iiFlags & IFF_BROADCAST)) continue;
sockaddr_storage address;
memset(&address, 0, sizeof(address));
/* iiBroadcast is unusable, because it always seems to be set to 255.255.255.255. */
memcpy(&address, &ifo[j].iiAddress.Address, sizeof(sockaddr));
((sockaddr_in*)&address)->sin_addr.s_addr = ifo[j].iiAddress.AddressIn.sin_addr.s_addr | ~ifo[j].iiNetmask.AddressIn.sin_addr.s_addr;
NetworkAddress addr(address, sizeof(sockaddr));
if (std::none_of(broadcast->begin(), broadcast->end(), [&addr](NetworkAddress const& elem) -> bool { return elem == addr; })) broadcast->push_back(addr);
}
free(ifo);
closesocket(sock);
}
#else /* not HAVE_GETIFADDRS */
#include "../../string_func.h"
static void NetworkFindBroadcastIPsInternal(NetworkAddressList *broadcast) // !GETIFADDRS implementation
{
SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == INVALID_SOCKET) return;
char buf[4 * 1024]; // Arbitrary buffer size
struct ifconf ifconf;
ifconf.ifc_len = sizeof(buf);
ifconf.ifc_buf = buf;
if (ioctl(sock, SIOCGIFCONF, &ifconf) == -1) {
closesocket(sock);
return;
}
const char *buf_end = buf + ifconf.ifc_len;
for (const char *p = buf; p < buf_end;) {
const struct ifreq *req = (const struct ifreq*)p;
if (req->ifr_addr.sa_family == AF_INET) {
struct ifreq r;
strecpy(r.ifr_name, req->ifr_name, lastof(r.ifr_name));
if (ioctl(sock, SIOCGIFFLAGS, &r) != -1 &&
(r.ifr_flags & IFF_BROADCAST) &&
ioctl(sock, SIOCGIFBRDADDR, &r) != -1) {
NetworkAddress addr(&r.ifr_broadaddr, sizeof(sockaddr));
if (std::none_of(broadcast->begin(), broadcast->end(), [&addr](NetworkAddress const& elem) -> bool { return elem == addr; })) broadcast->push_back(addr);
}
}
p += sizeof(struct ifreq);
#if defined(AF_LINK) && !defined(SUNOS)
p += req->ifr_addr.sa_len - sizeof(struct sockaddr);
#endif
}
closesocket(sock);
}
#endif /* all NetworkFindBroadcastIPsInternals */
/**
* Find the IPv4 broadcast addresses; IPv6 uses a completely different
* strategy for broadcasting.
* @param broadcast the list of broadcasts to write into.
*/
void NetworkFindBroadcastIPs(NetworkAddressList *broadcast)
{
NetworkFindBroadcastIPsInternal(broadcast);
/* Now display to the debug all the detected ips */
Debug(net, 3, "Detected broadcast addresses:");
int i = 0;
for (NetworkAddress &addr : *broadcast) {
addr.SetPort(NETWORK_DEFAULT_PORT);
Debug(net, 3, " {}) {}", i++, addr.GetHostname());
}
}
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