本文整理汇总了C++中HostInfo::SetErrorString方法的典型用法代码示例。如果您正苦于以下问题：C++ HostInfo::SetErrorString方法的具体用法？C++ HostInfo::SetErrorString怎么用？C++ HostInfo::SetErrorString使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类HostInfo的用法示例。
在下文中一共展示了HostInfo::SetErrorString方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Lookup
//.........这里部分代码省略.........
saSize = sizeof(sa6);
memset(&sa6, 0, sizeof(sa6));
sa6.sin6_family = AF_INET6;
memcpy(sa6.sin6_addr.s6_addr, address.GetIPv6Address().data, sizeof(sa6.sin6_addr.s6_addr));
sa6.sin6_port = htons(portNum);
}
// unknown (should be unreachable)
else BT_ASSERT_X(false, "HostInfo::Lookup: unknown network protocol");
// lookup name for IP
char hbuf[NI_MAXHOST];
char serv[NI_MAXSERV];
if ( sa && (getnameinfo(sa, saSize, hbuf, sizeof(hbuf), serv, sizeof(serv), 0) == 0) )
result.SetHostName(string(hbuf));
// if no domain name found, just use the original address's IP string
if ( result.HostName().empty() )
result.SetHostName(address.GetIPString());
// store address in HostInfo
uniqueAddresses.insert(address);
}
// otherwise, hostname is a domain name ('www.foo.bar')
// do 'normal' lookup
else {
// setup address lookup 'hints'
addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; // allow either IPv4 or IPv6
hints.ai_socktype = SOCK_STREAM; // for TCP
hints.ai_protocol = IPPROTO_TCP;
// fetch addresses for requested hostname/port
addrinfo* res;
int status = getaddrinfo(hostname.c_str(), port.c_str(), &hints, &res );
// if everything OK
if ( status == 0 ) {
// iterate over all IP addresses found
addrinfo* p = res;
for ( ; p != NULL; p = p->ai_next ) {
// IPv4
if ( p->ai_family == AF_INET ) {
sockaddr_in* ipv4 = (sockaddr_in*)p->ai_addr;
HostAddress a( ntohl(ipv4->sin_addr.s_addr) );
uniqueAddresses.insert(a);
}
// IPv6
else if ( p->ai_family == AF_INET6 ) {
sockaddr_in6* ipv6 = (sockaddr_in6*)p->ai_addr;
HostAddress a(ipv6->sin6_addr.s6_addr);
uniqueAddresses.insert(a);
}
}
// if we iterated, but no addresses were stored
if ( uniqueAddresses.empty() && (p == NULL) ) {
result.SetError(HostInfo::UnknownError);
result.SetErrorString("HostInfo: unknown address types found");
}
}
// handle error cases
else if (
#ifndef _WIN32
status == EAI_NONAME
|| status == EAI_FAIL
# ifdef EAI_NODATA
|| status == EAI_NODATA // officially deprecated, but just in case we happen to hit it
# endif // EAI_NODATA
#else // _WIN32
WSAGetLastError() == WSAHOST_NOT_FOUND
|| WSAGetLastError() == WSANO_DATA
|| WSAGetLastError() == WSANO_RECOVERY
#endif // _WIN32
)
{
result.SetError(HostInfo::HostNotFound);
result.SetErrorString("HostInfo: host not found");
}
else {
result.SetError(HostInfo::UnknownError);
result.SetErrorString("HostInfo: unknown error encountered");
}
// cleanup
freeaddrinfo(res);
}
// store fetched addresses (converting set -> vector) in result & return
result.SetAddresses( vector<HostAddress>(uniqueAddresses.begin(), uniqueAddresses.end()) );
return result;
}