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/* $Id$ */
/** @file host.cpp Functions related to getting host specific data (IPs). */
#ifdef ENABLE_NETWORK
#include "../../stdafx.h"
#include "../../debug.h"
#include "os_abstraction.h"
#include "../../core/alloc_func.hpp"
/**
* 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.
* @param limit the maximum number of items to add.
*/
static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit);
#if defined(PSP)
static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // PSP implementation
{
return 0;
}
#elif defined(BEOS_NET_SERVER) /* doesn't have neither getifaddrs or net/if.h */
/* Based on Andrew Bachmann's netstat+.c. Big thanks to him! */
int _netstat(int fd, char **output, int verbose);
int seek_past_header(char **pos, const char *header)
{
char *new_pos = strstr(*pos, header);
if (new_pos == 0) {
return B_ERROR;
}
*pos += strlen(header) + new_pos - *pos + 1;
return B_OK;
}
static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // BEOS implementation
{
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
DEBUG(net, 0, "[core] error creating socket");
return 0;
}
char *output_pointer = NULL;
int output_length = _netstat(sock, &output_pointer, 1);
if (output_length < 0) {
DEBUG(net, 0, "[core] error running _netstat");
return 0;
}
int index;
char **output = &output_pointer;
if (seek_past_header(output, "IP Interfaces:") == B_OK) {
while (index != limit) {
uint32 n, fields, read;
uint8 i1, i2, i3, i4, j1, j2, j3, j4;
struct in_addr inaddr;
uint32 ip;
uint32 netmask;
fields = sscanf(*output, "%u: %hhu.%hhu.%hhu.%hhu, netmask %hhu.%hhu.%hhu.%hhu%n",
&n, &i1, &i2, &i3, &i4, &j1, &j2, &j3, &j4, &read);
read += 1;
if (fields != 9) {
break;
}
ip = (uint32)i1 << 24 | (uint32)i2 << 16 | (uint32)i3 << 8 | (uint32)i4;
netmask = (uint32)j1 << 24 | (uint32)j2 << 16 | (uint32)j3 << 8 | (uint32)j4;
if (ip != INADDR_LOOPBACK && ip != INADDR_ANY) {
inaddr.s_addr = htonl(ip | ~netmask);
broadcast[index] = inaddr.s_addr;
index++;
}
if (read < 0) {
break;
}
*output += read;
}
closesocket(sock);
}
return index;
}
#elif defined(HAVE_GETIFADDRS)
static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // GETIFADDRS implementation
{
struct ifaddrs *ifap, *ifa;
if (getifaddrs(&ifap) != 0) return 0;
int index = 0;
for (ifa = ifap; ifa != NULL && index != limit; ifa = ifa->ifa_next) {
if (!(ifa->ifa_flags & IFF_BROADCAST)) continue;
if (ifa->ifa_broadaddr == NULL) continue;
if (ifa->ifa_broadaddr->sa_family != AF_INET) continue;
broadcast[index] = ((struct sockaddr_in*)ifa->ifa_broadaddr)->sin_addr.s_addr;
index++;
}
freeifaddrs(ifap);
return index;
}
#elif defined(WIN32)
static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // Win32 implementation
{
SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == INVALID_SOCKET) return 0;
DWORD len = 0;
INTERFACE_INFO *ifo = AllocaM(INTERFACE_INFO, limit);
memset(ifo, 0, limit * sizeof(*ifo));
if ((WSAIoctl(sock, SIO_GET_INTERFACE_LIST, NULL, 0, &ifo[0], limit * sizeof(*ifo), &len, NULL, NULL)) != 0) {
closesocket(sock);
return 0;
}
int index = 0;
for (uint j = 0; j < len / sizeof(*ifo) && index != limit; j++) {
if (ifo[j].iiFlags & IFF_LOOPBACK) continue;
if (!(ifo[j].iiFlags & IFF_BROADCAST)) continue;
/* iiBroadcast is unusable, because it always seems to be set to 255.255.255.255. */
broadcast[index++] = ifo[j].iiAddress.AddressIn.sin_addr.s_addr | ~ifo[j].iiNetmask.AddressIn.sin_addr.s_addr;
}
closesocket(sock);
return index;
}
#else /* not HAVE_GETIFADDRS */
#include "../../string_func.h"
static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // !GETIFADDRS implementation
{
SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == INVALID_SOCKET) return 0;
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 0;
}
const char *buf_end = buf + ifconf.ifc_len;
int index = 0;
for (const char *p = buf; p < buf_end && index != limit;) {
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) {
broadcast[index++] = ((struct sockaddr_in*)&r.ifr_broadaddr)->sin_addr.s_addr;
}
}
p += sizeof(struct ifreq);
#if defined(AF_LINK) && !defined(SUNOS)
p += req->ifr_addr.sa_len - sizeof(struct sockaddr);
#endif
}
closesocket(sock);
return index;
}
#endif /* all NetworkFindBroadcastIPsInternals */
/**
* Find the IPs to broadcast.
* @param broadcast the list of broadcasts to write into.
* @param limit the maximum number of items to add.
*/
void NetworkFindBroadcastIPs(uint32 *broadcast, int limit)
{
int count = NetworkFindBroadcastIPsInternal(broadcast, limit);
/* Make sure the list is terminated. */
broadcast[count] = 0;
/* Now display to the debug all the detected ips */
DEBUG(net, 3, "Detected broadcast addresses:");
for (int i = 0; broadcast[i] != 0; i++) {
DEBUG(net, 3, "%d) %s", i, inet_ntoa(*(struct in_addr *)&broadcast[i])); // inet_ntoa(inaddr));
}
}
/**
* Resolve a hostname to an ip.
* @param hsotname the hostname to resolve
* @return the IP belonging to that hostname, or 0 on failure.
*/
uint32 NetworkResolveHost(const char *hostname)
{
/* Is this an IP address? */
in_addr_t ip = inet_addr(hostname);
if (ip != INADDR_NONE) return ip;
/* No, try to resolve the name */
struct in_addr addr;
#if !defined(PSP)
struct hostent *he = gethostbyname(hostname);
if (he == NULL) {
DEBUG(net, 0, "[NET] Cannot resolve %s", hostname);
return 0;
}
addr = *(struct in_addr *)he->h_addr_list[0];
#else
int rid = -1;
char buf[1024];
/* Create a resolver */
if (sceNetResolverCreate(&rid, buf, sizeof(buf)) < 0) {
DEBUG(net, 0, "[NET] Error connecting resolver");
return 0;
}
/* Try to resolve the name */
if (sceNetResolverStartNtoA(rid, hostname, &addr, 2, 3) < 0) {
DEBUG(net, 0, "[NET] Cannot resolve %s", hostname);
sceNetResolverDelete(rid);
return 0;
}
sceNetResolverDelete(rid);
#endif /* PSP */
DEBUG(net, 1, "[NET] Resolved %s to %s", hostname, inet_ntoa(addr));
ip = addr.s_addr;
return ip;
}
#endif /* ENABLE_NETWORK */
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