int
eXosip_guess_ip_for_via (int family, char *address, int size)
{
/* w2000 and W95/98 */
unsigned long best_interface_index;
DWORD hr;
/* NT4 (sp4 only?) */
PMIB_IPFORWARDTABLE ipfwdt;
DWORD siz_ipfwd_table = 0;
unsigned int ipf_cnt;
address[0] = '\0';
best_interface_index = -1;
/* w2000 and W95/98 only */
hr = GetBestInterface(inet_addr("217.12.3.11"),&best_interface_index);
if (hr)
{
LPVOID lpMsgBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
hr,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR) &lpMsgBuf, 0, NULL);
OSIP_TRACE (osip_trace (__FILE__, __LINE__, OSIP_INFO4, NULL,
"GetBestInterface: %s\r\n", lpMsgBuf));
best_interface_index = -1;
}
if (best_interface_index != -1)
{ /* probably W2000 or W95/W98 */
char *servername;
char *serverip;
char *netmask;
OSIP_TRACE (osip_trace (__FILE__, __LINE__, OSIP_INFO4, NULL,
"Default Interface found %i\r\n", best_interface_index));
if (0 == ppl_dns_get_local_fqdn(&servername, &serverip, &netmask,
best_interface_index))
{
osip_strncpy(address, serverip, size);
osip_free(servername);
osip_free(serverip);
osip_free(netmask);
return 0;
}
return -1;
}
if (!GetIpForwardTable(NULL, &siz_ipfwd_table, FALSE) == ERROR_INSUFFICIENT_BUFFER
|| !(ipfwdt = (PMIB_IPFORWARDTABLE) alloca (siz_ipfwd_table)))
{
OSIP_TRACE (osip_trace (__FILE__, __LINE__, OSIP_INFO4, NULL,
"Allocation error\r\n"));
return -1;
}
/* NT4 (sp4 support only?) */
if (!GetIpForwardTable(ipfwdt, &siz_ipfwd_table, FALSE))
{
for (ipf_cnt = 0; ipf_cnt < ipfwdt->dwNumEntries; ++ipf_cnt)
{
if (ipfwdt->table[ipf_cnt].dwForwardDest == 0)
{ /* default gateway found */
char *servername;
char *serverip;
char *netmask;
OSIP_TRACE (osip_trace (__FILE__, __LINE__, OSIP_INFO4, NULL,
"Default Interface found %i\r\n", ipfwdt->table[ipf_cnt].dwForwardIfIndex));
if (0 == ppl_dns_get_local_fqdn(&servername,
&serverip,
&netmask,
ipfwdt->table[ipf_cnt].dwForwardIfIndex))
{
osip_strncpy(address, serverip, size);
osip_free(servername);
osip_free(serverip);
osip_free(netmask);
return 0;
}
return -1;
}
}
}
/* no default gateway interface found */
return -1;
}
bool NetworkObserver::canConnect()
{
#if defined(WIN32)
/* w2000 and W95/98 */
unsigned long best_interface_index;
DWORD hr;
/* NT4 (sp4 only?) */
PMIB_IPFORWARDTABLE ipfwdt;
DWORD siz_ipfwd_table = 0;
unsigned int ipf_cnt;
best_interface_index = -1;
/* w2000 and W95/98 only */
hr = GetBestInterface(inet_addr("216.151.151.59"),&best_interface_index); // VOXOX -ASV- 07-09-2009: we ping voxox.com to know if voxox has internet
if (hr)
{
LPVOID lpMsgBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
hr,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR) &lpMsgBuf, 0, NULL);
best_interface_index = -1;
}
if (best_interface_index != -1)
{ /* probably W2000 or W95/W98 */
char *servername;
char *serverip;
char *netmask;
if (ppl_dns_get_local_fqdn(&servername, &serverip, &netmask,
best_interface_index))
{
/*if(servername)
delete servername;
if(serverip)
delete serverip;
if(netmask)
delete netmask;*/
return true;
}
return false;
}
if (!GetIpForwardTable(NULL, &siz_ipfwd_table, FALSE) == ERROR_INSUFFICIENT_BUFFER
|| !(ipfwdt = (PMIB_IPFORWARDTABLE) alloca (siz_ipfwd_table)))
{
return false;
}
/* NT4 (sp4 support only?) */
if (!GetIpForwardTable(ipfwdt, &siz_ipfwd_table, FALSE))
{
for (ipf_cnt = 0; ipf_cnt < ipfwdt->dwNumEntries; ++ipf_cnt)
{
if (ipfwdt->table[ipf_cnt].dwForwardDest == 0)
{ /* default gateway found */
char *servername;
char *serverip;
char *netmask;
if (ppl_dns_get_local_fqdn(&servername,
&serverip,
&netmask,
ipfwdt->table[ipf_cnt].dwForwardIfIndex))
{
delete servername;
delete serverip;
delete netmask;
return true;
}
return false;
}
}
}
/* no default gateway interface found */
return true;
#else
#if defined(OS_MACOSX)
socklen_t len;
#else
unsigned int len;
#endif
int sock_rt, on=1;
struct sockaddr_in iface_out;
struct sockaddr_in remote;
memset(&remote, 0, sizeof(struct sockaddr_in));
remote.sin_family = AF_INET;
remote.sin_addr.s_addr = inet_addr("216.151.151.59");// VOXOX -ASV- 07-09-2009: we ping voxox.com to know if voxox has internet
remote.sin_port = htons(80);
memset(&iface_out, 0, sizeof(iface_out));
sock_rt = socket(AF_INET, SOCK_DGRAM, 0 );
if (setsockopt(sock_rt, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) == -1)
{
close(sock_rt);
return false;
}
if (::connect(sock_rt, (struct sockaddr*)&remote, sizeof(struct sockaddr_in)) == -1 )
{
close(sock_rt);
return false;
}
len = sizeof(iface_out);
if (getsockname(sock_rt, (struct sockaddr *)&iface_out, &len) == -1 )
{
close(sock_rt);
return false;
}
close(sock_rt);
if (iface_out.sin_addr.s_addr == 0)
{ /* what is this case?? */
return false;
}
return true;
#endif
}
